Signal transmission method, apparatus, device, and system

Abstract

The application provides a signal transmission method, device, equipment and system. The method comprises: a terminal device receiving scheduling information from a network device, the scheduling information being used for indicating a sending mode of the terminal device for sending an uplink signal, and the terminal device sending the uplink signal based on the sending mode indicated by the scheduling information. The sending mode of the uplink signal comprises at least one of the following: sending an uplink narrowband signal on a narrowband frequency, sending the uplink narrowband signal on a wideband frequency, or sending an uplink wideband signal on the wideband frequency. The above scheme can realize the network side scheduling the terminal to send the narrowband signal on the wideband frequency and send the wideband signal on the wideband frequency, thereby improving the frequency resource utilization rate and transmission performance of the communication system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of network transmission and wireless communication, and in particular to a signal transmission method, device, equipment and system. BACKGROUND

[0002] A multi-modal communication system includes a narrowband system and a wideband system. The narrowband system is, for example, Police Digital Trunking (PDT), Trans European Trunked Radio (TETRA), etc. The wideband system is, for example, Long Term Evolution (LTE), New Radio (NR), 340MHz image transmission, 1430MHz police aviation image transmission, etc. Compared with the wideband system, the narrowband system has higher transmission power and greater channel coverage distance. Compared with the narrowband system, the wideband system has a larger carrier bandwidth.

[0003] In the multi-modal communication system, the narrowband system and the wideband system are independent of each other, mainly in the following aspects: the narrowband system and the wideband system use different frequency bands; the narrowband system and the wideband system are respectively configured with different baseband signal processing and radio frequency channel transmission; the scheduling and signal transmission of the narrowband system and the wideband system are separated.

[0004] At present, the multi-modal communication system does not support joint scheduling between the narrowband system and the wideband system, and the resource utilization rate and transmission performance of the communication system need to be improved. SUMMARY

[0005] Embodiments of the present application provide a signal transmission method, device, equipment and system, which can improve the frequency resource utilization rate and transmission performance of the communication system.

[0006] In a first aspect, embodiments of the present application provide a signal transmission method, which comprises:

[0007] A terminal device receives scheduling information from a network device, wherein the scheduling information is used to indicate a transmission mode of the terminal device for transmitting an uplink signal; the transmission mode of the uplink signal includes at least one of the following: transmitting an uplink narrowband signal on a narrowband frequency, or transmitting an uplink narrowband signal on a wideband frequency, or transmitting an uplink wideband signal on a wideband frequency;

[0008] The terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information.

[0009] In an optional embodiment of the first aspect, the terminal device receives the scheduling information from the network device, comprising:

[0010] The terminal device receives the scheduling information on a narrowband physical downlink control channel.

[0011] In an optional embodiment of the first aspect, the terminal device receives the scheduling information from the network device, comprising:

[0012] In the first condition, the terminal device receives the scheduling information from the network device for instructing the terminal device to transmit the uplink narrowband signal on the wideband frequency;

[0013] The first condition comprises at least one of:

[0014] The wideband frequency resource is free; or

[0015] The wideband frequency resource is allowed to be preempted; or

[0016] There is interference in transmitting the uplink narrowband signal on the narrowband frequency; or

[0017] The narrowband frequency resource is limited.

[0018] In an optional embodiment of the first aspect, the scheduling information comprises an index for indicating a transmission mode of the terminal device for transmitting the uplink signal;

[0019] The method further comprises:

[0020] The terminal device acquires a transmission parameter set corresponding to the index in the scheduling information by querying a pre-configured correspondence between the index and the transmission parameter set;

[0021] The terminal device transmits the uplink signal based on the scheduling information, comprising:

[0022] The terminal device transmits the uplink signal based on the transmission parameter set corresponding to the index in the scheduling information.

[0023] In an optional embodiment of the first aspect, if the scheduling information is for instructing the terminal device to transmit the uplink narrowband signal on a wideband frequency; the terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information, comprising:

[0024] The application processor of the terminal device configures a first signal transmission path through a control path selection module, and transmits the uplink narrowband signal on the wideband frequency through the first signal transmission path; the first signal transmission path comprises a narrowband baseband processing module and a wideband radio frequency processing module.

[0025] In an optional embodiment of the first aspect, if the scheduling information is used to instruct the terminal device to transmit the uplink narrowband signal on a narrowband frequency, the terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information, including:

[0026] The application processor of the terminal device configures a second signal transmission path through a control path selection module, and transmits the uplink narrowband signal on the narrowband frequency through the second signal transmission path; the second signal transmission path includes a narrowband baseband processing module and a narrowband radio frequency processing module.

[0027] In an optional embodiment of the first aspect, the terminal device receives scheduling information from the network device, including:

[0028] In the second condition, the terminal device receives scheduling information from the network device, which is used to instruct the terminal device to transmit the uplink wideband signal on the wideband frequency;

[0029] The second condition includes at least one of the following:

[0030] The narrowband signal coverage is normal, and the wideband signal coverage is weak; or

[0031] The uplink single sideband frequency resource is available.

[0032] In an optional embodiment of the first aspect, if the scheduling information is used to instruct the terminal device to transmit the uplink wideband signal on a wideband frequency, the terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information, including:

[0033] The application processor of the terminal device configures a third signal transmission path through a control path selection module, and transmits the uplink wideband signal on the wideband frequency through the third signal transmission path;

[0034] The third signal transmission path includes a wideband baseband processing module and a wideband radio frequency processing module.

[0035] In the second aspect, the embodiments of the present application provide a signal transmission method, including:

[0036] The network device transmits scheduling information to the terminal device, and the scheduling information is used to instruct the terminal device to transmit an uplink signal in a transmission mode;

[0037] The transmission mode of the uplink signal includes at least one of the following: transmitting an uplink narrowband signal on a narrowband frequency, or transmitting the uplink narrowband signal on a wideband frequency, or transmitting an uplink wideband signal on a wideband frequency;

[0038] The network device receives the uplink signal from the terminal device based on the transmission mode of the uplink signal indicated by the scheduling information.

[0039] In an optional embodiment of the second aspect, the network device sends the scheduling information to the terminal device, comprising:

[0040] In the first condition, the network device sends scheduling information to the terminal device, which indicates the terminal device to transmit the uplink narrowband signal on the wideband frequency.

[0041] The first condition comprises at least one of:

[0042] The wideband frequency resource is idle; or

[0043] The wideband frequency resource is allowed to be preempted; or

[0044] There is interference in transmitting the uplink narrowband signal on the narrowband frequency; or

[0045] The narrowband frequency resource is limited.

[0046] In an optional embodiment of the second aspect, if the scheduling information is used to indicate the terminal device to transmit the uplink narrowband signal on the wideband frequency, the network device receives the uplink signal from the terminal device based on the transmission mode of the uplink signal indicated by the scheduling information, comprising:

[0047] The network device receives an uplink signal on the wideband frequency, and the uplink signal comprises the uplink narrowband signal.

[0048] The method further comprises:

[0049] The network device separates the uplink narrowband signal from the uplink signal.

[0050] The network device transmits the uplink narrowband signal to a narrowband baseband processing module of the network device for processing.

[0051] In an optional embodiment of the second aspect, the network device sends the scheduling information to the terminal device, comprising:

[0052] In the second condition, the network device sends scheduling information to the terminal device, which indicates the terminal device to transmit the uplink wideband signal on the wideband frequency.

[0053] The second condition comprises at least one of:

[0054] The narrowband signal coverage is normal while the wideband signal coverage is weak; or

[0055] The uplink single sideband frequency resource is available.

[0056] In an optional embodiment of the second aspect, if the scheduling information is used to instruct the terminal device to transmit the uplink wideband signal on a wideband frequency, the network device receives the uplink signal from the terminal device based on the transmission mode of the uplink signal indicated by the scheduling information, including:

[0057] The network device receives the uplink signal on the wideband frequency, and the uplink signal includes the uplink wideband signal.

[0058] The method further includes:

[0059] The network device separates the uplink wideband signal from the uplink signal.

[0060] The network device transmits the uplink wideband signal to a wideband baseband processing module of the network device for processing.

[0061] In a third aspect, an embodiment of the present application provides a signal transmission device, which includes:

[0062] A receiving module is configured to receive scheduling information from a network device, and the scheduling information is used to instruct a transmission mode of an uplink signal transmitted by a transmission module; the transmission mode of the uplink signal includes at least one of the following: transmitting an uplink narrowband signal on a narrowband frequency, or transmitting the uplink narrowband signal on a wideband frequency, or transmitting an uplink wideband signal on a wideband frequency.

[0063] The transmission module is configured to transmit the uplink signal based on the transmission mode indicated by the scheduling information.

[0064] In a fourth aspect, an embodiment of the present application provides a signal transmission device, which includes:

[0065] A transmission module is configured to transmit scheduling information to a terminal device, and the scheduling information is used to instruct a transmission mode of an uplink signal transmitted by the terminal device.

[0066] The transmission mode of the uplink signal includes at least one of the following: transmitting an uplink narrowband signal on a narrowband frequency, or transmitting the uplink narrowband signal on a wideband frequency, or transmitting an uplink wideband signal on a wideband frequency.

[0067] A receiving module is configured to receive the uplink signal from the terminal device based on the transmission mode of the uplink signal indicated by the scheduling information.

[0068] In a fifth aspect, an embodiment of the present application provides a terminal device, comprising: a processor and a memory; the memory stores computer-executable instructions; and the processor executes the computer-executable instructions stored in the memory, so that the terminal device performs the method according to any one of the first aspect.

[0069] In a sixth aspect, an embodiment of the present application provides a network device, comprising: a processor and a memory; the memory stores computer-executable instructions; and the processor executes the computer-executable instructions stored in the memory, so that the network device performs the method according to any one of the second aspect.

[0070] In a seventh aspect, an embodiment of the present application provides a communication system, comprising: at least one terminal device and a network device, wherein the at least one terminal device is in communication connection with the network device.

[0071] The at least one terminal device performs the method according to any one of the first aspect, and the network device performs the method according to any one of the second aspect.

[0072] In an eighth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the method according to any one of the first aspect or the method according to any one of the second aspect.

[0073] In a ninth aspect, the present application provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the method according to any one of the first aspect or the method according to any one of the second aspect.

[0074] Embodiments of the present application provide a signal transmission method, device, equipment and system, the method comprising: a terminal device receives scheduling information from a network device, the scheduling information is used to indicate a transmission mode of the terminal device sending an uplink signal, and the terminal device sends the uplink signal based on the transmission mode indicated by the scheduling information. Wherein, the transmission mode of the uplink signal comprises at least one of the following: sending an uplink narrowband signal on a narrowband frequency, or sending an uplink narrowband signal on a wideband frequency, or sending an uplink wideband signal on a wideband frequency. The above scheme can realize the network side scheduling the terminal to send the narrowband signal on the wideband frequency, and send the wideband signal on the wideband frequency, and improve the frequency resource utilization and transmission performance of the communication system. BRIEF DESCRIPTION OF DRAWINGS

[0075] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0076] Figure 1 Structure diagram of terminal device provided for embodiments of the present application Figure 1 ;

[0077] Figure 2 Structure diagram of wideband and narrowband integrated multi-mode chip provided for embodiments of the present application Figure 1 ;

[0078] Figure 3 Structure diagram of wideband and narrowband integrated multi-mode chip provided for embodiments of the present application Figure 2 ;

[0079] Figure 4 Structure diagram of wideband and narrowband integrated multi-mode chip provided for embodiments of the present application Figure 3 ;

[0080] Figure 5 Structure diagram of signal transmission path provided for embodiments of the present application

[0081] Figure 6 Flow diagram of signal transmission method provided for embodiments of the present application Figure 1 ;

[0082] Figure 7 Flow diagram of signal transmission method provided for embodiments of the present application Figure 2 ;

[0083] Figure 8 Flow diagram of signal transmission method provided for embodiments of the present application Figure 3 ;

[0084] Figure 9 Structure diagram of spectrum resource allocation provided for embodiments of the present application

[0085] Figure 10 Structure diagram of signal transmission device provided for embodiments of the present application Figure 1 ;

[0086] Figure 11 Structure diagram of signal transmission device provided for embodiments of the present application Figure 2 ;

[0087] Figure 12 Structure diagram of terminal device provided for embodiments of the present application Figure 2 ;

[0088] Figure 13 A structural schematic diagram of a network device provided for an embodiment of the present application is shown in FIG. 1.

[0089] Figure 14 A structural schematic diagram of a terminal device provided for an embodiment of the present application is shown in FIG. 2. Figure 3 . DETAILED DESCRIPTION

[0090] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0091] The terms "first", "second", "third", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0092] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a list of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to such processes, methods, products, or devices.

[0093] The terms involved in the embodiments of the present application are explained as follows:

[0094] A baseband chip refers to a chip used to synthesize a baseband signal to be transmitted or to decode a received baseband signal. Specifically, it encodes a voice or other data signal into a baseband code for transmission when transmitting, and decodes a received baseband code into a voice or other data signal when receiving. It mainly performs information processing functions of a communication terminal.

[0095] A radio frequency chip, also known as a radio frequency integrated circuit (RFIC), is a special-purpose semiconductor device designed to effectively process radio frequency signals.

[0096] Radio frequency front end is a core component in wireless communication equipment, mainly for converting radio electromagnetic wave signals and binary digital signals. It is mainly composed of power amplifier (PA), low frequency noise amplifier (LNA), filter (Filter), switch (Switch), duplexer (Duplexer and Diplexer) and tuner (Antenna Tuner), etc. The characteristics and performance of these components directly affect the signal transmission of electronic equipment.

[0097] Application processor, also known as multimedia application processor (MAP), is a super large scale integrated circuit based on low power central processing unit (CPU) and extended audio and video functions and special interfaces, mainly responsible for processing audio, video and image information.

[0098] Narrowband signal refers to a signal with a relatively narrow frequency band. The frequency bandwidth of a narrowband signal is relatively small compared to the center frequency, i.e. WB / f0<1 / 10, where WB is the signal bandwidth and f0 is the center frequency. For example, if the center frequency is 1GHz and the bandwidth is 10MHz, the signal can be considered as a narrowband signal.

[0099] Wideband signal refers to a signal with a relatively wide frequency band. The frequency bandwidth of a wideband signal is relatively large compared to the center frequency, i.e. B<<f0 or B / f0<<1. Generally speaking, the relative bandwidth of a narrowband signal is B / f0<0.1, while the relative bandwidth of a wideband signal is relatively large, even reaching several orders of magnitude. Wideband signals have higher data transmission rates and wider frequency bandwidths, and can handle multiple different signal types simultaneously. In wideband signals, various communication protocols and modulation / demodulation techniques are widely used to achieve high-speed and efficient data transmission.

[0100] Single side band (SSB) communication is a communication method that can remove the carrier and the other side band during communication to save frequency band and power. The advantages of single side band communication are: saving frequency band, saving power, and improving security because the single side band transmitter does not transmit the carrier frequency.

[0101] In a multi-modal communication system, narrowband systems and wideband systems use different frequency bands. The frequency resources defined by narrowband systems are relatively low, such as the frequencies defined by PDT / TETRA, which are generally below 1GHz, such as 350MHz, 370MHz and 800MHz. The frequency resources defined by wideband systems are around 1GHz, C-Band and sub 6G, etc. The power spectral density of narrowband systems is generally higher than that of wideband systems, and the coverage, especially the uplink coverage, is generally greater than that of wideband systems.

[0102] Currently, in multi-mode communication, terminal devices are usually configured with different baseband signal processing and radio frequency channels to transmit or receive narrowband signals or wideband signals. For example, Figure 1 The structure of a terminal device provided by an embodiment of the present application is shown in Figure 1 . As shown in Figure 1 , the terminal device includes an antenna, a radio frequency front end, a radio frequency chip, a baseband chip, and an application processor. The radio frequency chip includes a narrowband radio frequency processing module and a wideband radio frequency processing module, and the baseband chip includes a narrowband baseband processing module and a wideband baseband processing module. The connection relationship between the modules or devices of the terminal device is as follows: the application processor is connected to the baseband chip, specifically, the application processor is connected to the narrowband baseband processing module and the wideband baseband processing module in the baseband chip. The narrowband baseband processing module of the baseband chip is connected to the narrowband radio frequency processing module of the radio frequency chip, and the wideband baseband processing module of the baseband chip is connected to the wideband radio frequency processing module of the radio frequency chip. The radio frequency chip is connected to the radio frequency front end, specifically, the radio frequency front end is connected to the narrowband radio frequency processing module and the wideband radio frequency processing module in the radio frequency chip. The radio frequency front end is connected to the antenna.

[0103] In some embodiments, the application processor can transmit audio / video or image information to the baseband chip, the baseband chip loads the information on the baseband signal, and after processing by the baseband chip, the radio frequency chip, and the radio frequency front end, the antenna completes the transmission of the uplink signal. Conversely, the antenna receives the downlink signal, the downlink signal carries the downlink information, and after processing by the radio frequency front end, the radio frequency chip, and the baseband chip, the downlink information is transmitted to the application processor.

[0104] Based on the terminal device shown in Figure 2 , the transmission path of the narrowband signal includes the narrowband baseband processing module of the baseband chip and the narrowband radio frequency processing module of the radio frequency chip, and the transmission path of the wideband signal includes the wideband baseband processing module of the baseband chip and the wideband radio frequency processing module of the radio frequency chip. Among them, the transmission path of the narrowband signal and the transmission path of the wideband signal are independent of each other, and the uplink transmission of the narrowband signal cannot share the radio frequency channel of the wideband signal, that is, it cannot share the wideband radio frequency processing module.

[0105] Currently, when the narrowband resource is limited or the wideband signal interference is large, even if the wideband frequency resource is idle or the uplink single sideband frequency resource is available, the system does not support narrowband scheduling wideband wireless resources, that is, the network side does not support scheduling the uplink transmission of the narrowband signal at the wideband frequency through the narrowband physical downlink control channel, or scheduling the uplink transmission of the wideband signal at the wideband frequency through the narrowband physical downlink control channel.

[0106] In view of this, the embodiment of the present application shows a wideband and narrowband integrated multi-mode chip, which comprises a baseband chip and a radio frequency chip, and a path selection module is arranged between the baseband chip and the radio frequency chip to decouple baseband processing and radio frequency processing. The multi-mode chip can be applied to a terminal side, and the terminal side can be configured to connect a narrowband baseband processing module in the baseband chip and a wideband radio frequency processing module in the radio frequency chip through the path selection module, so that the terminal side can send uplink narrowband signals on a wideband frequency. In this way, when narrowband resources are limited and wideband frequency resources are idle, the terminal device can send uplink narrowband signals on wideband resources based on network scheduling, thereby improving the transmission performance and resource utilization of the communication system.

[0107] Based on a terminal device comprising the above multi-mode chip, the embodiment of the present application shows a signal transmission method. On the one hand, a narrowband scheduling mechanism is introduced, i.e. a mechanism for scheduling wide and narrow wireless resources by a narrowband channel. The network side can schedule the terminal device to send uplink narrowband signals on a narrowband frequency resource, or to send uplink narrowband signals on a wideband frequency resource, or to send uplink wideband signals on a wideband frequency resource through a narrowband physical downlink control channel, thereby improving the transmission performance of the communication system. On the other hand, a wide and narrow integrated scheduling mechanism is introduced. The terminal side can configure the transmission path of narrowband baseband processing and wideband radio frequency processing by controlling the path selection module based on the scheduling of the network side. When uplink narrowband signals are sent, the wideband radio frequency path can be multiplexed, the frequency spectrum resources are shared, and the utilization rate of the frequency resources is improved.

[0108] The technical solutions of the present application will be described in detail in the following specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments.

[0109] Exemplarily, Figure 1 The structure of the wideband and narrowband integrated multi-mode chip provided by the embodiment of the present application is shown in Figure 2 . As Figure 3 shown, the wideband and narrowband integrated multi-mode chip of the embodiment comprises a baseband chip, a radio frequency chip, an application processor and a path selection module. The baseband chip is connected to the radio frequency chip through the path selection module, and the application processor is connected to the path selection module and the baseband chip respectively.

[0110] In some embodiments, the baseband chip can comprise a plurality of baseband processing modules, and multi-path baseband processing can improve the processing speed of the baseband chip. The radio frequency chip can comprise a plurality of radio frequency processing modules, and multi-path radio frequency processing can improve the processing speed of the radio frequency chip.

[0111] In some embodiments, the application processor is configured, based on scheduling information from the network device, via a control path selection module to configure a transmission path for transmitting uplink narrowband signals or uplink wideband signals.

[0112] The multi-mode chip shown in this embodiment adds a path selection module, supports multiple transmission modes, and can be applied to terminal devices in a multi-mode communication system. The terminal device can transmit uplink signals based on the transmission mode scheduled by the network side. The path selection module in the multi-mode chip can be regarded as a gating switch module. Under the control of the application processor, it can connect one baseband processing module in the baseband chip to one or more radio frequency processing modules in the radio frequency chip to realize multiple transmission modes.

[0113] The multi-mode chip supports the following transmission modes: first transmission mode, second transmission mode, and third transmission mode. The first transmission mode transmits uplink narrowband signals at a wideband frequency, the second transmission mode transmits uplink narrowband signals at a narrowband frequency, and the third transmission mode transmits uplink wideband signals at a wideband frequency.

[0114] For example, Figure 2 A schematic diagram of the structure of the multimode chip that integrates broadband and narrowband bandwidth provided in the embodiments of this application. Figure 3 .like Figure 4 As shown, the baseband chip includes a narrowband baseband processing module and a wideband baseband processing module. The narrowband baseband processing module performs baseband processing on uplink narrowband signals, and the wideband baseband processing module performs baseband processing on uplink wideband signals. The RF chip includes a narrowband RF processing module and a wideband RF processing module. The narrowband RF processing module performs RF modulation on uplink narrowband signals, and the wideband RF processing module performs RF modulation on either uplink narrowband or uplink wideband signals.

[0115] In some embodiments, one end of the path selection module is connected to both the narrowband baseband processing module and the wideband baseband processing module. The other end of the path selection module is connected to both the narrowband radio frequency processing module and the wideband radio frequency processing module.

[0116] In some embodiments, the application processor is connected to the path selection module to control the path selection module. The application processor is connected to both the narrowband baseband processing module and the wideband baseband processing module of the baseband chip.

[0117] In some embodiments, the path selection module is integrated into the baseband chip, such as... Figure 4 As shown.

[0118] In some embodiments, the application processor is integrated into the baseband chip, such as Figure 5 As shown.

[0119] In some embodiments, if the scheduling information is used to indicate that the uplink narrowband signal is transmitted on the wideband frequency, the application processor is configured to configure, through the control channel selection module, a first signal transmission channel, the first signal transmission channel comprising a narrowband baseband processing module and a wideband radio frequency processing module, as shown in FIG. 8. Figure 5 The first signal transmission channel corresponds to a first transmission mode, i.e., the transmission of the uplink narrowband signal on the wideband frequency. The uplink narrowband signal is sequentially processed by the narrowband baseband processing module and the wideband radio frequency processing module, and then processed by the radio frequency front end before being transmitted by the antenna.

[0120] In some embodiments, if the scheduling information is used to indicate that the uplink narrowband signal is transmitted on the narrowband frequency, the application processor is configured to configure, through the control channel selection module, a second signal transmission channel, the second signal transmission channel comprising a narrowband baseband processing module and a narrowband radio frequency processing module, as shown in FIG. 9. Figure 5 The second signal transmission channel corresponds to a second transmission mode, i.e., the transmission of the uplink narrowband signal on the narrowband frequency. The uplink narrowband signal is sequentially processed by the narrowband baseband processing module and the narrowband radio frequency processing module, and then processed by the radio frequency front end before being transmitted by the antenna.

[0121] In some embodiments, if the scheduling information is used to indicate that the uplink wideband signal is transmitted on the wideband frequency, the application processor is configured to configure, through the control channel selection module, a third signal transmission channel, the third signal transmission channel comprising a wideband baseband processing module and a wideband radio frequency processing module, as shown in FIG. 10. Figure 6 The third signal transmission channel corresponds to a third transmission mode, i.e., the transmission of the uplink wideband signal on the wideband frequency. The uplink wideband signal is sequentially processed by the wideband baseband processing module and the wideband radio frequency processing module, and then processed by the radio frequency front end before being transmitted by the antenna.

[0122] In some embodiments, the application processor is preconfigured (predefined) with a set of transmission parameters, the set of transmission parameters comprising at least one of: a first index of the first transmission mode for transmitting the uplink narrowband signal and a set of transmission parameters corresponding to the first index; or a second index of the second transmission mode for transmitting the uplink narrowband signal and a set of transmission parameters corresponding to the second index; or a third index of the third transmission mode for transmitting the uplink wideband signal and a set of transmission parameters corresponding to the third index. The application processor is configured to transmit the uplink narrowband signal or the uplink wideband signal by querying the set of transmission parameters corresponding to the index indicated in the scheduling information.

[0123] The preconfigured set of transmission parameters includes, but is not limited to, a modulation mode, a coding mode, a transmission power, and the like. In a multi-modal communication system, by preconfiguring the set of transmission parameters, the network device can carry an index corresponding to the set of transmission parameters in the scheduling information to indicate the transmission mode corresponding to the index to the terminal device, and the signaling interaction overhead can be saved.

[0124] The terminal device sends the uplink signal based on the index in the scheduling information and the correspondence between the preconfigured set of transmission parameters and the index. Carrying the index in the scheduling information can save the signaling interaction overhead and improve the transmission performance of the communication system.

[0125] In a multi-modal communication system, the terminal device is built-in with the multi-mode chip shown in the above embodiments, and based on the scheduling of the network side, the uplink narrowband signal can be controlled to be sent on a narrowband frequency or a wideband frequency, and the uplink wideband signal can be controlled to be sent on a wideband frequency.

[0126] The signal transmission method will be described in detail below with reference to several specific embodiments.

[0127] Exemplarily, Figure 1 The flowchart of the signal transmission method provided by the embodiments of the present application is shown in Figure 6 .

[0128] As Figure 7 shown, the signal transmission method of the present embodiment includes the following steps:

[0129] S601, the network device sends scheduling information to the terminal device, and the scheduling information is used to indicate a transmission mode of the terminal device for sending an uplink signal.

[0130] In some embodiments, the network device sends the scheduling information to the terminal device on a narrowband physical downlink control channel. Correspondingly, the terminal device receives the scheduling information from the network device on the narrowband physical downlink control channel.

[0131] In some embodiments, the network device generates the scheduling information by detecting the signal reception and interference of the narrowband signal and the wideband signal, to indicate which transmission mode the terminal device uses to send the uplink signal. The transmission mode of the terminal device includes a first transmission mode, a second transmission mode, and a third transmission mode. The first transmission mode is to send an uplink narrowband signal on a wideband frequency, the second transmission mode is to send an uplink narrowband signal on a narrowband frequency, and the third transmission mode is to send an uplink wideband signal on a wideband frequency.

[0132] S602, the terminal device sends the uplink signal based on the transmission mode indicated by the scheduling information.

[0133] In some embodiments, the scheduling information is used to indicate that the terminal device transmits the uplink signal in a first transmission mode, i.e., to instruct the terminal device to transmit an uplink narrowband signal on a wideband frequency, and the terminal device transmits the uplink narrowband signal on the wideband frequency based on the scheduling information.

[0134] In some embodiments, the scheduling information is used to indicate that the terminal device transmits the uplink signal in a second transmission mode, i.e., to instruct the terminal device to transmit an uplink narrowband signal on a narrowband frequency, and the terminal device transmits the uplink narrowband signal on the narrowband frequency based on the scheduling information.

[0135] In some embodiments, the scheduling information is used to indicate that the terminal device transmits the uplink signal in a third transmission mode, i.e., to instruct the terminal device to transmit an uplink wideband signal on a wideband frequency, and the terminal device transmits the uplink wideband signal on the wideband frequency based on the scheduling information.

[0136] In some embodiments, the scheduling information includes an index used to indicate the transmission mode of the terminal device transmitting the uplink signal. For example, a first index corresponds to the first transmission mode, a second index corresponds to the second transmission mode, and a third index corresponds to the third transmission mode.

[0137] The terminal device obtains the transmission parameter set corresponding to the index in the scheduling information by querying the pre-configured correspondence between the transmission parameter set and the index, and transmits the uplink signal based on the transmission parameter set corresponding to the index in the scheduling information.

[0138] In one example, the index indicated by the scheduling information is a first index, the first index corresponds to the first transmission mode, the terminal device obtains the transmission parameter set corresponding to the first index, and transmits the uplink narrowband signal on the wideband frequency.

[0139] In one example, the index indicated by the scheduling information is a second index, the second index corresponds to the second transmission mode, the terminal device obtains the transmission parameter set corresponding to the second index, and transmits the uplink narrowband signal on the narrowband frequency.

[0140] In the above two examples, the transmission of the uplink narrowband signal includes retransmission or new transmission of the uplink narrowband signal.

[0141] In one example, the index indicated by the scheduling information is a third index, the third index corresponds to the third transmission mode, the terminal device obtains the transmission parameter set corresponding to the third index, and transmits the uplink wideband signal on the wideband frequency.

[0142] In the above example, the transmission of the uplink wideband signal includes retransmission or new transmission of the uplink wideband signal.

[0143] It should be understood that the transmission parameter sets corresponding to the different transmission modes of the present embodiment are different.

[0144] The signal transmission method shown in the embodiment can be used for the terminal device to transmit uplink narrowband signals or uplink broadband signals based on a transmission mode indicated in scheduling information transmitted by the network device. The scheduling information can be carried on a narrowband physical downlink control channel, that is, the network device can schedule the transmission of the uplink narrowband signals or the uplink broadband signals through the narrowband downlink channel. The existing technology does not support scheduling the uplink transmission of broadband signals through a narrowband. The above solution supports scheduling the uplink transmission of narrowband signals or broadband signals through a narrowband, thereby improving the transmission performance of the communication system.

[0145] For example, Figure 2 The signal transmission method provided by the embodiment of the present application is shown in the flowchart Figure 7 .

[0146] As Figure 4 shown, the signal transmission method of the embodiment includes the following steps:

[0147] S701, under a first condition, the network device transmits scheduling information to the terminal device, and the scheduling information is used to instruct the terminal device to transmit uplink narrowband signals on a broadband frequency.

[0148] In the embodiment, the first condition includes at least one of the following: the broadband frequency resource is idle; or the broadband frequency resource is allowed to be preempted; or there is interference in transmitting the uplink narrowband signals on the narrowband frequency; or the narrowband frequency resource is limited.

[0149] In some embodiments, the network device determines that there is interference in transmitting the uplink narrowband signals on the narrowband frequency or that the narrowband frequency resource is limited, and that the broadband frequency resource is idle and available, by detecting the signal reception and interference of the narrowband signals and the broadband signals. The network device can transmit scheduling information to the terminal device through a narrowband physical downlink control channel to instruct the terminal device to transmit the uplink narrowband signals on the broadband frequency, that is, to schedule the uplink narrowband signals to be transmitted on the broadband frequency.

[0150] In some embodiments, referring to Figure 5 and Figure 8 , the application processor of the terminal device configures a first signal transmission path through a control path selection module, and the first signal transmission path includes a narrowband baseband processing module of a baseband chip and a broadband radio frequency processing module of a radio frequency chip. The terminal device transmits the uplink narrowband signals on the broadband frequency through the first signal transmission path. In this embodiment, the terminal device does not need to configure a narrowband radio frequency path on the broadband frequency, and the narrowband signals share the broadband radio frequency path through the control of the path selection module.

[0151] S702, the terminal device transmits the uplink signals on the broadband frequency based on the scheduling information, and the uplink signals include the uplink narrowband signals.

[0152] In some embodiments, the terminal device can send the uplink narrowband signal on the wideband frequency based on the scheduling information, and can also send an uplink wideband signal on the wideband frequency. Correspondingly, the network device receives the uplink signal from the terminal device on the wideband frequency, which can include the uplink narrowband signal and the uplink wideband signal at the same time, and the network device can extract the uplink narrowband signal by performing S703.

[0153] S703, the network device separates the uplink narrowband signal from the uplink signal.

[0154] S704, the network device transmits the uplink narrowband signal to a narrowband baseband processing module of the network device for processing.

[0155] In some embodiments, if the uplink signal also includes an uplink wideband signal, the network device can separate the uplink wideband signal from the uplink signal and transmit the uplink wideband signal to a wideband baseband processing module of the network device for processing.

[0156] The signal transmission method shown in this embodiment, when the first condition is met, the network device sends scheduling information to the terminal device through the narrowband control channel, instructing the terminal device to send the uplink narrowband signal and / or the uplink wideband signal on the wideband frequency. The terminal device can multiplex the wideband radio frequency channel when sending the uplink narrowband signal, achieving sharing of frequency resources and improving the utilization rate of frequency resources.

[0157] Figure 4 Flowchart of the signal transmission method provided by the embodiments of the present application Figure 8 As shown in Figure 4 , the signal transmission method of this embodiment includes the following steps:

[0158] S801, under the second condition, the network device sends scheduling information to the terminal device, and the scheduling information is used to instruct the terminal device to send the uplink wideband signal on the wideband frequency.

[0159] In this embodiment, the second condition includes at least one of the following: the narrowband signal coverage is normal and the wideband signal coverage is weak; or the uplink single sideband frequency resource is available. The narrowband signal coverage being normal means that the signal strength of the narrowband signal in its coverage range is greater than or equal to a preset threshold. The wideband signal coverage being weak means that the signal strength of the wideband signal in its coverage range is less than a preset threshold.

[0160] In some embodiments, the network device determines that the narrowband signal coverage is normal and the wideband signal coverage is weak, or the uplink single sideband frequency resource is available, by detecting the signal reception and interference of the narrowband signal and the wideband signal, and the network device can send the scheduling information to the terminal device through the narrowband physical downlink control channel to instruct the terminal device to send the uplink narrowband signal on the wideband frequency, i.e., to schedule the uplink wideband signal to be sent on the wideband frequency.

[0161] In some embodiments, referring to Figure 5 and Figure 4 , the application processor of the terminal device configures a third signal transmission path through the control path selection module, the third signal transmission path comprising a wideband baseband processing module of the baseband chip and a wideband radio frequency processing module of the radio frequency chip. The terminal device transmits an uplink wideband signal on a wideband frequency through the third signal transmission path.

[0162] S802, the terminal device transmits an uplink signal on a wideband frequency based on the scheduling information, the uplink signal comprising an uplink wideband signal.

[0163] In some embodiments, the terminal device transmits an uplink narrowband signal on a wideband frequency while transmitting an uplink wideband signal on a wideband frequency based on the scheduling information. Correspondingly, the network device receives an uplink signal from the terminal device on a wideband frequency, the uplink signal possibly comprising an uplink narrowband signal and an uplink wideband signal at the same time, and the network device can extract the uplink wideband signal by performing S803.

[0164] S803, the network device separates the uplink wideband signal from the uplink signal.

[0165] S804, the network device transmits the uplink wideband signal to a wideband baseband processing module of the network device for processing.

[0166] In some embodiments, if the uplink signal further comprises an uplink narrowband signal, the network device can separate the uplink narrowband signal from the uplink signal and transmit the uplink narrowband signal to a narrowband baseband processing module of the network device for processing.

[0167] The signal transmission method shown in this embodiment can be used to indicate the terminal device to transmit an uplink wideband signal on a wideband frequency through a narrowband control channel when the second condition is met. The existing communication system does not support uplink transmission of a wideband signal through a narrowband control channel, and the above scheme supports uplink transmission of a wideband signal through a narrowband control channel, which can improve the transmission performance of the communication system.

[0168] In some embodiments, referring to Figure 5 and Figure 9 , the application processor of the terminal device configures a second signal transmission path through the control path selection module, the second signal transmission path comprising a narrowband baseband processing module of the baseband chip and a narrowband radio frequency processing module of the radio frequency chip. The terminal device transmits an uplink narrowband signal on a narrowband frequency through the second signal transmission path. The signal transmission method shown in this embodiment can be used to indicate the terminal device to transmit an uplink narrowband signal on a narrowband frequency through a narrowband control channel, which is the existing transmission mode of the current system.

[0169] The public safety field has established a PDT network to support voice paging, voice cluster and small data volume data services. With the expansion of service requirements, on the basis of voice cluster communication, the demand for broadband private network supporting multimedia convergence services such as pictures, videos, real-time positioning and command dispatching is becoming more and more urgent, and the narrowband communication system has been unable to meet the existing service requirements. The existing PDT or TETRA is analyzing and introducing the evolution scheme of broadband.

[0170] Exemplary, Figure 9 The schematic diagram of spectrum resource allocation provided by the embodiment of the present application. As shown in the figure, Figure 10 In the field of public safety, the existing spectrum resource allocation is as follows:

[0171] 1) 336-344MHz is the uplink image transmission frequency interval, which can be used for public safety image acquisition, and can apply for continuous 4MHz or two discontinuous 2MHz, and can preferentially use 336-340MHz.

[0172] 2) 351-356MHz (uplink UL) / 361-366MHz (downlink DL) 2x5MHz frequency division duplex (FDD) is the narrowband PDT system frequency interval.

[0173] 3) 1430-1438MHz is the frequency interval dedicated to helicopters and unmanned aerial vehicles, and is dedicated to one-way image transmission.

[0174] The narrowband PDT system frequency resource and channel are limited, and are mainly used for voice guaranteed communication. In the medium and large-scale terminal use scenario, only a small amount of geographic information system (GIS) information upload can be supported, and when the 340MHz image transmission channel is idle, the current cannot support uplink data transmission, nor support triggering the upload of uplink image data.

[0175] Based on the mechanism of narrowband channel scheduling wide and narrow wireless resources in the foregoing embodiment, the network side (or system side) can support:

[0176] 1) Narrowband physical downlink control channel is used to schedule wideband frequency resources to transmit uplink narrowband signals, that is, the first transmission mode of the foregoing embodiment.

[0177] The first sending mode is an extended sending mode, for example, a wideband frequency of 336-344MHz can be defined, and the network side can directly or indirectly instruct the terminal side to send an uplink narrowband signal at the wideband frequency. Direct indication refers to indicating the numerical value of the wideband frequency interval in the scheduling information, and indirect indication refers to indicating an index or identifier in the scheduling information, and the network side and the terminal side preset the correspondence between the index or identifier and the wideband frequency interval in advance, and the terminal side learns the wideband frequency interval based on the index or identifier, and sends an uplink narrowband signal in the interval.

[0178] The network side detects the signal transmission of 336-344MHz uplink, measures the received signal code power (RSCP), received signal strength indication (RSSI), and interference signal code power (ISCP) and other signal conditions of the frequency segment, and according to the frequency usage and interference conditions, schedules and controls the uplink GIS data of the PDT terminal to be sent at the uplink frequency of 336-344MHz. Specifically, the baseband signal is processed by the PDT technology standard (which can correspond to the narrowband baseband processing module of the foregoing embodiment), and the radio frequency path uses a shared wideband 336-344MHz radio frequency path for sending (which can correspond to the wideband radio frequency processing module of the foregoing embodiment), that is, after the baseband signal processing is completed, the terminal switches the PDT baseband signal to the 340MHz wideband radio frequency path for sending through the path selection module.

[0179] 2) Send an uplink narrowband signal by scheduling a narrowband frequency resource through a narrowband physical downlink control channel, that is, the second sending mode of the foregoing embodiment.

[0180] In an example, the network side controls the uplink sending of the PDT voice signal or GIS signal at the narrowband frequency of 351-356MHz through the sending of a narrowband physical downlink control channel.

[0181] 3) Send an uplink wideband signal by scheduling a wideband frequency resource through a narrowband physical downlink control channel, that is, the third sending mode of the foregoing embodiment.

[0182] In an example, a set of predefined 336-344MHz wideband service transmission parameters is defined, such as a set of video service parameters of 1MBps / 2M / 4MBps orthogonal frequency division multiplexing (OFDM). The network side detects the uplink 336-344MHz signal transmission, measures the RSCP, RSSI and ISCP of the frequency segment, and according to the frequency usage and interference condition, schedules the terminal side to transmit the wideband signal of the video service in the 336-344MHz through the narrowband physical downlink control channel.

[0183] In an example, the 340MHz image transmission does not support voice, and if image transmission + voice communication needs to be supported, a set of video and voice concurrent service parameters of 1Mbps+PDT narrowband voice coding (NVOC) can be predefined, and the scheduling information is transmitted through the narrowband physical downlink control channel to realize the uplink transmission of the narrowband channel scheduling wideband video and voice.

[0184] Figure 1 Structure of the signal transmission device provided by the embodiment of the application Figure 10 As shown in Figure 11 , the signal transmission device 1000 of the embodiment includes a receiving module 1001 and a sending module 1002.

[0185] The receiving module 1001 is configured to receive scheduling information from a network device, wherein the scheduling information is used to indicate a sending mode of sending an uplink signal by the sending module 1002; and the sending mode of the uplink signal includes at least one of the following: sending an uplink narrowband signal on a narrowband frequency, or sending an uplink narrowband signal on a wideband frequency, or sending an uplink wideband signal on a wideband frequency.

[0186] The sending module 1002 is configured to send the uplink signal based on the sending mode indicated by the scheduling information.

[0187] In an optional embodiment, the receiving module 1001 is configured to receive the scheduling information on a narrowband physical downlink control channel.

[0188] In an optional embodiment, the receiving module 1001 is configured to receive, under a first condition, scheduling information from the network device for instructing the sending module 1002 to send the uplink narrowband signal on the wideband frequency.

[0189] The first condition includes at least one of the following:

[0190] a wideband frequency resource is idle; or

[0191] Broadband frequency resources can be preempted; or

[0192] Interference exists when transmitting the uplink narrowband signal at the narrowband frequency; or

[0193] Narrowband frequency resources are limited.

[0194] In one optional embodiment, the scheduling information includes an index for instructing the transmitting module 1002 to transmit the uplink signal in a transmission mode;

[0195] The signal transmission device 1000 also includes: a processing module 1003;

[0196] The processing module 1003 is used to obtain the sending parameter set corresponding to the index in the scheduling information by querying the correspondence between the pre-configured sending parameter set and the index;

[0197] The sending module 1002 is used to send the uplink signal based on the sending parameter set corresponding to the index in the scheduling information.

[0198] In an optional embodiment, if the scheduling information is used to instruct the transmitting module 1002 to transmit the uplink narrowband signal on a broadband frequency; the application processor of the signal transmission device 1000 configures a first signal transmission path through a control path selection module, and the transmitting module 1002 transmits the uplink narrowband signal on the broadband frequency through the first signal transmission path; the first signal transmission path includes a narrowband baseband processing module and a broadband radio frequency processing module.

[0199] In one optional embodiment, if the scheduling information is used to instruct the terminal device to transmit the uplink narrowband signal on a narrowband frequency; the application processor of the signal transmission device 1000 configures a second signal transmission path through a control path selection module, and the transmission module 1003 transmits the uplink narrowband signal on the narrowband frequency via the second signal transmission path; the second signal transmission path includes a narrowband baseband processing module and a narrowband radio frequency processing module.

[0200] In one optional embodiment, the receiving module 1001 is configured to receive, under a second condition, scheduling information from the network device instructing the transmitting module 1002 to transmit the uplink broadband signal on the broadband frequency;

[0201] The second condition includes at least one of the following:

[0202] Narrowband signal coverage is normal, while broadband signal coverage is weak; or

[0203] Uplink single-sideband frequency resources are available.

[0204] In an alternative embodiment, if the scheduling information is used to instruct the terminal device to send the uplink wideband signal on a wideband frequency, the application processor of the signal transmission device 1000 configures a third signal transmission path through the control path selection module, and the sending module 1002 sends the uplink wideband signal on the wideband frequency through the third signal transmission path.

[0205] The third signal transmission path comprises a wideband baseband processing module and a wideband radio frequency processing module.

[0206] The signal transmission device provided by the embodiments of the present application is used to realize the technical scheme of the terminal device in the foregoing method embodiments, and has similar implementation principles and technical effects, which will not be described here in detail.

[0207] Figure 2 The structure of the signal transmission device provided by the embodiments of the present application is shown in Figure 11 FIG. 1. Figure 12 As shown in FIG. 1, the signal transmission device 1100 of the present embodiment comprises a sending module 1101 and a receiving module 1102.

[0208] The sending module 1101 is used to send scheduling information to a terminal device, and the scheduling information is used to instruct the terminal device to send an uplink signal in a sending mode.

[0209] The sending mode of the uplink signal comprises at least one of the following: sending an uplink narrowband signal on a narrowband frequency, or sending the uplink narrowband signal on a wideband frequency, or sending an uplink wideband signal on a wideband frequency.

[0210] The receiving module 1102 is used to receive the uplink signal from the terminal device based on the sending mode of the uplink signal instructed by the scheduling information.

[0211] In an alternative embodiment, the sending module 1101 is used to send, under a first condition, scheduling information to the terminal device, which is used to instruct the terminal device to send the uplink narrowband signal on the wideband frequency.

[0212] The first condition comprises at least one of the following:

[0213] The wideband frequency resource is idle; or

[0214] The wideband frequency resource is allowed to be preempted; or

[0215] There is interference in sending the uplink narrowband signal on the narrowband frequency; or

[0216] The narrowband frequency resource is limited.

[0217] In an optional embodiment, if the scheduling information is used to instruct the terminal device to transmit the uplink narrowband signal on a broadband frequency, the receiving module 1102 is used to receive the uplink signal on the broadband frequency, the uplink signal including the uplink narrowband signal;

[0218] The signal transmission device 1100 also includes a signal extraction module 1103;

[0219] The signal extraction module 1103 is used to separate the uplink narrowband signal from the uplink signal and transmit the uplink narrowband signal to the narrowband baseband processing module of the signal transmission device 1100 for processing.

[0220] In one optional embodiment, the sending module 1101 is configured to send scheduling information to the terminal device under a second condition, instructing the terminal device to send the uplink broadband signal on the broadband frequency.

[0221] The second condition includes at least one of the following:

[0222] Narrowband signal coverage is normal, while broadband signal coverage is weak; or

[0223] Uplink single-sideband frequency resources are available.

[0224] In an optional embodiment, if the scheduling information is used to instruct the terminal device to transmit the uplink broadband signal on a broadband frequency, the receiving module 1102 is used to receive the uplink signal on the broadband frequency, the uplink signal including the uplink broadband signal;

[0225] The signal extraction module 1103 is used to separate the uplink broadband signal from the uplink signal and transmit the uplink broadband signal to the broadband baseband processing module of the signal transmission device 1100 for processing.

[0226] The signal transmission device provided in this application embodiment is used to implement the technical solution of the network device in the aforementioned method embodiment. Its implementation principle and technical effect are similar, and will not be repeated here.

[0227] Figure 2 Schematic diagram of the structure of the terminal device provided in the embodiments of this application Figure 12 .like Figure 13 As shown, the terminal device 1200 of this embodiment includes: a processor 1201 and a memory 1202; the memory 1202 stores computer execution instructions; the processor 1201 executes the computer execution instructions stored in the memory 1202, causing the terminal device 1200 to perform the method steps of the terminal device as described in any of the foregoing method embodiments. Its implementation principle and technical effects are similar, and will not be repeated here.

[0228] Figure 13 This is a schematic diagram of the network device provided in an embodiment of this application. Figure 14 As shown, the network device 1300 of this embodiment includes a processor 1301 and a memory 1302; the memory 1302 stores computer execution instructions; the processor 1301 executes the computer execution instructions stored in the memory 1302, causing the network device 1300 to perform the method steps of the network device as described in any of the foregoing method embodiments. Its implementation principle and technical effects are similar and will not be repeated here.

[0229] Figure 3 Schematic diagram of the structure of the terminal device provided in the embodiments of this application Figure 14 .like Figure 2 As shown, the terminal device in this embodiment includes: a multi-mode chip 1401 integrating broadband and narrowband bandwidth, a radio frequency front-end 1402, and an antenna 1403, wherein the multi-mode chip 1401 is connected to the radio frequency front-end 1402, and the radio frequency front-end 1402 is connected to the antenna. The multi-mode chip 1401 can be the aforementioned... Figure 3 , Figure 4 or Figure 1 The multi-mode chip shown can be described in terms of its functions and technical effects as described in the foregoing embodiments, and will not be repeated here.

[0230] This application provides a communication system comprising: at least one terminal device and a network device, wherein the at least one terminal device is communicatively connected to the network device; the at least one terminal device executes the method steps of the terminal device as described in any of the foregoing method embodiments, and the network device executes the method steps of the network device as described in any of the foregoing method embodiments. Its implementation principle and technical effects are similar to the aforementioned related embodiments, and will not be repeated here.

[0231] This application provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the method steps of the terminal device as described in any of the foregoing method embodiments. Its implementation principle and technical effects are similar to the aforementioned related embodiments, and will not be repeated here.

[0232] This application provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the method steps of the network device as described in any of the foregoing method embodiments. Its implementation principle and technical effects are similar to those of the aforementioned related embodiments, and will not be repeated here.

[0233] The embodiment of the present application provides a computer program product, the computer program product comprises a computer program, when the computer program is executed, the computer executes the method steps of the terminal device in any one of the foregoing method embodiments. The implementation principle and technical effects are similar to those of the above-mentioned related embodiments, and will not be repeated here.

[0234] The embodiment of the present application provides a computer program product, the computer program product comprises a computer program, when the computer program is executed, the computer executes the method steps of the network device in any one of the foregoing method embodiments. The implementation principle and technical effects are similar to those of the above-mentioned related embodiments, and will not be repeated here.

[0235] The embodiment of the present application provides a chip, the chip comprises a processor, and the processor is used for calling a computer program in a memory to execute the method steps of the terminal device in any one of the foregoing method embodiments. The implementation principle and technical effects are similar to those of the above-mentioned related embodiments, and will not be repeated here.

[0236] The embodiment of the present application provides a chip, the chip comprises a processor, and the processor is used for calling a computer program in a memory to execute the method steps of the network device in any one of the foregoing method embodiments. The implementation principle and technical effects are similar to those of the above-mentioned related embodiments, and will not be repeated here.

[0237] The method described in the foregoing embodiments can be implemented all or partially by software, hardware, firmware or any combination thereof. If implemented by software, the function can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. The computer-readable medium can include a computer storage medium and a communication medium, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium that can be accessed by a computer.

[0238] The computer readable medium can include a RAM, ROM, compact disc read-only memory (CD-ROM), or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray® discs where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0239] The embodiments of the present application are described with reference to the flowchart and / or block diagram of the method, apparatus (system) and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as a combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the computer or other programmable data processing apparatus generate a means for implementing the functions specified in the flowchart and / or block diagram block or blocks. Figure 1 The flow or flows and / or blocks ​ The means for carrying out the functions specified in the flowchart and / or block diagram block or blocks.

[0240] The above detailed description has further described the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A signal transmission method, characterized in that, include: The terminal device receives scheduling information from the network device, the scheduling information being used to indicate the transmission mode of the uplink signal sent by the terminal device; the transmission mode of the uplink signal includes at least one of the following: transmitting uplink narrowband signal on a narrowband frequency, or transmitting uplink narrowband signal on a wideband frequency, or transmitting uplink wideband signal on a wideband frequency; The terminal device sends the uplink signal based on the transmission mode indicated by the scheduling information.

2. The method according to claim 1, characterized in that, The terminal device receives scheduling information from the network device, including: The terminal device receives the scheduling information on a narrowband physical downlink control channel.

3. The method according to claim 1 or 2, characterized in that, The terminal device receives scheduling information from the network device, including: Under the first condition, the terminal device receives scheduling information from the network device instructing the terminal device to transmit the uplink narrowband signal on the broadband frequency; The first condition includes at least one of the following: Broadband frequency resources are idle; or Broadband frequency resources can be preempted; or Interference exists when transmitting the uplink narrowband signal at the narrowband frequency; or Narrowband frequency resources are limited.

4. The method according to any one of claims 1 to 3, characterized in that, The scheduling information includes an index for instructing the terminal device on the transmission mode for sending the uplink signal; The method further includes: The terminal device obtains the sending parameter set corresponding to the index in the scheduling information by querying the correspondence between the pre-configured sending parameter set and the index; The terminal device sends the uplink signal based on the scheduling information, including: The terminal device sends the uplink signal based on the set of transmission parameters corresponding to the index in the scheduling information.

5. The method according to any one of claims 1 to 4, characterized in that, If the scheduling information is used to instruct the terminal device to transmit the uplink narrowband signal on a broadband frequency; The terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information, including: The application processor of the terminal device configures a first signal transmission path through a control path selection module, and transmits the uplink narrowband signal on the broadband frequency through the first signal transmission path; the first signal transmission path includes a narrowband baseband processing module and a broadband radio frequency processing module.

6. The method according to any one of claims 1 to 4, characterized in that, If the scheduling information is used to instruct the terminal device to transmit the uplink narrowband signal on a narrowband frequency; The terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information, including: The application processor of the terminal device configures a second signal transmission path through a control path selection module, and transmits the uplink narrowband signal at the narrowband frequency through the second signal transmission path; the second signal transmission path includes a narrowband baseband processing module and a narrowband radio frequency processing module.

7. The method according to any one of claims 1 to 3, characterized in that, The terminal device receives scheduling information from the network device, including: Under the second condition, the terminal device receives scheduling information from the network device instructing the terminal device to transmit the uplink broadband signal on the broadband frequency; The second condition includes at least one of the following: Narrowband signal coverage is normal, while broadband signal coverage is weak; or Uplink single-sideband frequency resources are available.

8. The method according to claim 7, characterized in that, If the scheduling information is used to instruct the terminal device to transmit the uplink broadband signal on a broadband frequency; the terminal device transmits the uplink signal based on the transmission mode indicated by the scheduling information, including: The application processor of the terminal device configures a third signal transmission path through the control path selection module, and transmits the uplink broadband signal on the broadband frequency through the third signal transmission path. The third signal transmission path includes a broadband baseband processing module and a broadband radio frequency processing module.

9. A signal transmission method, characterized in that, include: The network device sends scheduling information to the terminal device, the scheduling information being used to indicate the transmission mode of the terminal device for sending uplink signals; The uplink signal transmission mode includes at least one of the following: transmitting an uplink narrowband signal at a narrowband frequency, or transmitting the uplink narrowband signal at a wideband frequency, or transmitting an uplink wideband signal at a wideband frequency. The network device receives the uplink signal from the terminal device based on the uplink signal transmission mode indicated by the scheduling information.

10. The method according to claim 9, characterized in that, The network device sends the scheduling information to the terminal device, including: Under the first condition, the network device sends scheduling information to the terminal device, instructing the terminal device to transmit the uplink narrowband signal on the broadband frequency; The first condition includes at least one of the following: Broadband frequency resources are idle; or Broadband frequency resources can be preempted; or Interference exists when transmitting the uplink narrowband signal at the narrowband frequency; or Narrowband frequency resources are limited.

11. The method according to claim 9 or 10, characterized in that, If the scheduling information is used to instruct the terminal device to transmit the uplink narrowband signal on a broadband frequency, the network device receives the uplink signal from the terminal device based on the transmission mode of the uplink signal indicated by the scheduling information, including: The network device receives an uplink signal on the broadband frequency, the uplink signal including the uplink narrowband signal; The method further includes: The network device separates the uplink narrowband signal from the uplink signal; The network device transmits the uplink narrowband signal to the narrowband baseband processing module of the network device for processing.

12. The method according to claim 9, characterized in that, The network device sends the scheduling information to the terminal device, including: Under the second condition, the network device sends scheduling information to the terminal device, instructing the terminal device to transmit the uplink broadband signal on the broadband frequency; The second condition includes at least one of the following: Narrowband signal coverage is normal, while broadband signal coverage is weak; or Uplink single-sideband frequency resources are available.

13. The method according to claim 9 or 12, characterized in that, If the scheduling information is used to instruct the terminal device to transmit the uplink broadband signal on a broadband frequency, the network device receives the uplink signal from the terminal device based on the transmission mode of the uplink signal indicated by the scheduling information, including: The network device receives an uplink signal on the broadband frequency, the uplink signal including the uplink broadband signal; The method further includes: The network device separates the uplink broadband signal from the uplink signal; The network device transmits the uplink broadband signal to the broadband baseband processing module of the network device for processing.

14. A signal transmission device, characterized in that, The device includes: A receiving module is configured to receive scheduling information from a network device, the scheduling information being used to instruct the sending module on the transmission mode of transmitting uplink signals; the transmission mode of the uplink signals includes at least one of the following: transmitting uplink narrowband signals on a narrowband frequency, or transmitting the uplink narrowband signals on a wideband frequency, or transmitting uplink wideband signals on a wideband frequency. The transmitting module is used to transmit the uplink signal based on the transmitting mode indicated by the scheduling information.

15. A signal transmission device, characterized in that, The device includes: The sending module is used to send scheduling information to the terminal device, wherein the scheduling information is used to indicate the sending mode of the terminal device for sending uplink signals; The uplink signal transmission mode includes at least one of the following: Transmitting an uplink narrowband signal at a narrowband frequency, or transmitting the uplink narrowband signal at a wideband frequency, or transmitting an uplink wideband signal at a wideband frequency.

16. A terminal device, characterized in that, include: Processor and memory; The memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, causing the terminal device to perform the method as described in any one of claims 1 to 8.

17. A network device, characterized in that, include: Processor and memory; The memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, causing the network device to perform the method as described in any one of claims 9 to 13.

18. A communication system, characterized in that, include: At least one terminal device and a network device, wherein the at least one terminal device is communicatively connected to the network device; The at least one terminal device performs the method as described in any one of claims 1 to 8, and the network device performs the method as described in any one of claims 9 to 13.

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