CN116155464B - Sounding reference signal sending method and related equipment - Google Patents
Sounding reference signal sending method and related equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
Abstract
The present disclosure provides a Sounding Reference Signal (SRS) transmission method and related apparatus. The SRS transmission method comprises the following steps: receiving configuration information from a base station; determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information; generating SRS baseband signals according to configuration information in response to determining to generate the narrowband SRS; determining an SRS baseband signal from among the pre-stored wideband SRS signals in response to determining to generate the wideband SRS; generating an SRS radio frequency signal based on the SRS baseband signal; and transmitting the SRS radio frequency signal. The application can generate the narrowband SRS baseband signal when the narrowband SRS is required to be transmitted, and determine the SRS baseband signal from the prestored broadband SRS signal when the broadband SRS is required to be transmitted, so that the terminal can support the transmission of the SRS signal with higher bandwidth under the condition of not increasing the cost of the terminal, namely, the lightweight terminal can also support various enhanced SRS positioning functions.
Description
Technical Field
The disclosure relates to the technical field of wireless communication, and in particular relates to a sounding reference signal sending method and related equipment.
Background
This section is intended to provide a background or context to the embodiments of the disclosure recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The application scenarios of the fifth generation mobile communication technology (5G) can be divided into three major classes, including enhanced mobile broadband (enhanced mobile broadband, eMBB), ultra-high reliability low latency communication (ultra-reliable and low latency communications, uirllc) and mass machine type communication (massive machine type communication, mctc). The eMBB mainly faces to the demands of people on the mobile internet, and the demands comprise mobile phones, high-definition videos, virtual Reality (VR), augmented reality (augmented reality, AR) and the like; uRLLC is mainly oriented to high-performance special applications such as industrial control, internet of vehicles and the like; mctc is a large-scale internet of things deployment and application.
The 5G uses an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) technology adopted by the fifth generation mobile communication technology (4G). One major advantage of OFDM is that orthogonal subcarriers can be modulated and demodulated using fast fourier transform/inverse fast fourier transform (FFT/IFFT). In addition, in the 5G mobile communication system, a sounding reference signal (Sounding Reference Signal, abbreviated SRS) is also introduced in the uplink. The base station side can estimate the transmission quality of the channel according to the SRS transmitted by the terminal, and can estimate the uplink timing according to the SRS transmitted by the terminal. Thus, SRS is typically applied for positioning.
With the promotion of 5G industrial application, the high power consumption and high cost of 5G modules and terminals are becoming more and more the bottleneck restricting the large-scale popularization of various industries. At the same time, some high performance of 5G modules and terminals is also wasteful in application requirements of some industries, such as speed and the like. Thus, 3GPP proposes a 5G lightweight (also called NRlight) terminal based on a balance of performance and cost in R17. In order to reduce hardware cost, the 5G lightweight terminal adopts 1T2R antenna configuration (namely 1 transmitting antenna and 2 receiving antennas), and the maximum bandwidth of the 5G lightweight terminal is 20MHz in the Sub-6GHz frequency band. The 5G lightweight terminal is mainly oriented to three typical application scenes of an industrial wireless sensor, video monitoring and wearable equipment, and can be applied to industries and public network consumer users.
Because the maximum bandwidth supported by the 5G lightweight terminal is 20MHz, the uplink of the terminal can only support 20M SRS transmission at the maximum, and therefore, the enhanced SRS positioning function cannot be provided. Currently, this limitation of maximum bandwidth has become one of the bottlenecks in practical applications for 5G lightweight terminals.
Disclosure of Invention
In view of this, the disclosure proposes an SRS transmission method, which may enable a lightweight terminal to also support various enhanced SRS positioning functions.
The SRS transmission method proposed by the embodiment of the present disclosure may include: receiving configuration information from a base station; determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information; generating SRS baseband signals according to the configuration information in response to determining to generate the narrowband SRS; in response to determining to generate a wideband SRS, determining the SRS baseband signal from among pre-stored wideband SRS signals; generating an SRS radio frequency signal based on the SRS baseband signal; and transmitting the SRS radio frequency signal.
In an embodiment of the disclosure, the configuration information includes: partial bandwidth BWP; wherein the determining whether to generate the narrowband SRS or the wideband SRS according to the configuration information comprises: comparing the BWP with a preset bandwidth threshold; responsive to determining that the BWP is greater than the bandwidth threshold, determining to generate a wideband SRS; and in response to determining that the BWP is less than or equal to the bandwidth threshold, determining to generate a narrowband SRS.
In an embodiment of the disclosure, the generating the SRS baseband signal according to the configuration information includes: generating SRS baseband signals according to the configuration information at the sending moment of the SRS signals; and the determining the SRS baseband signal from the pre-stored SRS signals includes: at the transmission time of the SRS signal, the SRS baseband signal is determined from the broadband SRS signal stored in advance.
In an embodiment of the disclosure, the configuration information includes: SRS configuration parameters; wherein the generating the SRS baseband signal according to the configuration information includes: generating a ZC sequence according to the SRS configuration parameters; mapping the ZC sequence to a frequency domain in a comb-shaped mode to obtain a frequency domain sequence; performing Inverse Fast Fourier Transform (IFFT) on the frequency domain sequence to obtain a time domain sequence; and adding a cyclic prefix CP to the time domain sequence to obtain the SRS baseband signal.
In an embodiment of the disclosure, the determining the SRS baseband signal from the pre-stored wideband SRS signal includes: determining the identification of the broadband SRS signal corresponding to the SRS configuration parameter based on the mapping relation between the configuration information and the pre-stored identification of the broadband SRS signal; determining a storage position of the broadband SRS signal according to the identification of the SRS signal; and extracting the corresponding broadband SRS signal from a memory according to the storage position of the broadband SRS signal as the SRS baseband signal.
In an embodiment of the disclosure, the configuration information includes: identification of wideband SRS signals; wherein, the determining the SRS baseband signal from the pre-stored broadband SRS signal comprises: determining a storage position of the broadband SRS signal according to the identification of the broadband SRS signal; and extracting the corresponding broadband SRS signal from a memory according to the storage position of the broadband SRS signal as the SRS baseband signal.
In an embodiment of the disclosure, the determining the SRS baseband signal from the pre-stored wideband SRS signal includes: and extracting a pre-stored broadband SRS signal as the SRS baseband signal.
In an embodiment of the disclosure, the generating the SRS radio frequency signal based on the SRS baseband signal includes: and carrying out signal modulation on the SRS signal to generate the SRS radio frequency signal.
In an embodiment of the disclosure, the generating the SRS radio frequency signal based on the SRS baseband signal includes: buffering the SRS baseband signal; and at the sending moment of the SRS signal, carrying out signal modulation on the SRS signal to generate the SRS radio frequency signal.
In an embodiment of the disclosure, the transmitting the SRS radio frequency signal includes: and circularly transmitting the SRS radio frequency signals.
The embodiment of the disclosure also provides a terminal, including:
a configuration information receiving module for receiving configuration information from a base station;
the baseband module is used for determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information; generating SRS baseband signals according to the configuration information in response to determining to generate the narrowband SRS; in response to determining to generate a wideband SRS, determining the SRS baseband signal from among pre-stored wideband SRS signals;
The radio frequency module is used for receiving the SRS baseband signal from the baseband module and generating an SRS radio frequency signal based on the SRS baseband signal; and
and the transmitting antenna is used for transmitting the SRS radio frequency signals.
In an embodiment of the present disclosure, the baseband module includes: the device comprises a control unit, a narrowband SRS signal generator and a broadband SRS signal generator; wherein,
the control unit is used for determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information, and triggering the narrowband SRS signal generator to work in response to the determination of the generation of the narrowband SRS; in response to determining to generate a wideband SRS, triggering the wideband SRS signal generator to operate;
the narrowband SRS signal generator is used for generating the SRS baseband signal according to the configuration information; and
the wideband SRS signal generator is configured to determine the SRS baseband signal from a pre-stored wideband SRS signal.
In an embodiment of the present disclosure, the terminal further includes: and the timing controller is used for triggering the baseband module to work at the SRS signal sending moment.
In an embodiment of the present disclosure, the terminal further includes: and the timing controller is used for triggering the radio frequency module to work at the SRS signal sending moment.
In an embodiment of the disclosure, the radio frequency module includes: a buffer and a radio frequency processing unit; the buffer is used for buffering the SRS baseband signal; the radio frequency processing unit is used for generating SRS radio frequency signals based on the buffered SRS baseband signals under the triggering of the timing controller.
In an embodiment of the present disclosure, the terminal further includes: and the cyclic transmission control unit is used for controlling the transmitting antenna to cyclically transmit the SRS radio frequency signals.
The computer device according to an embodiment of the present disclosure includes:
one or more processors, memory; and
one or more programs;
wherein the one or more programs are stored in the memory and executed by the one or more processors, the programs including instructions for performing the sounding reference signal transmission method described above.
A non-transitory computer-readable storage medium containing a computer program according to an embodiment of the disclosure, which when executed by one or more processors, causes the processors to perform the above-described sounding reference signal transmission method.
The computer program product according to the embodiments of the present disclosure includes computer program instructions that, when executed on a computer, cause the computer to perform the sounding reference signal transmission method described above.
As can be seen, in the SRS transmission method disclosed in the embodiment of the present disclosure, when a narrowband SRS needs to be transmitted, the terminal may generate a narrowband SRS baseband signal to be transmitted by itself; and when the broadband SRS needs to be transmitted, the terminal can determine the SRS baseband signal of the broadband to be transmitted from the pre-stored broadband SRS signals, and the real-time generation is not needed. Therefore, the scheme disclosed by the embodiment of the disclosure can still enable the terminal to support the transmission of SRS signals with higher bandwidth without increasing the cost of the terminal, namely, the lightweight terminal can also support various enhanced SRS positioning functions.
Drawings
In order to more clearly illustrate the technical solutions of the present disclosure or related art, the drawings required for the embodiments or related art description will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to those of ordinary skill in the art.
Fig. 1 shows an implementation flow of an SRS transmission method according to an embodiment of the present disclosure;
FIG. 2 shows an implementation flow of a method for determining an SRS baseband signal from pre-stored wideband SRS signals according to an embodiment of the present disclosure;
Fig. 3 illustrates a functional structure of a terminal according to some embodiments of the present disclosure;
fig. 4 illustrates a functional structure of a terminal according to other embodiments of the present disclosure;
fig. 5 illustrates a functional structure of a terminal according to still other embodiments of the present disclosure; and
fig. 6 illustrates a hardware structure of an exemplary computer device provided by an embodiment of the present disclosure.
Detailed Description
For purposes of making the objects, technical solutions, and advantages of the present disclosure more apparent, the principle and spirit of the present disclosure will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are presented merely to enable one skilled in the art to better understand and practice the present disclosure and are not intended to limit the scope of the present disclosure in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In this document, it should be understood that any number of elements in the drawings is for illustration and not limitation, and that any naming is used only for distinction and not for any limitation.
It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure pertains. The terms "first," "second," and the like, as used in embodiments of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As previously described, since the maximum bandwidth supported by the above 5G lightweight terminal is only 20MHz, that is, at present, the uplink of the terminal can only support 20MHz SRS transmission at maximum, so that the current 5G lightweight terminal cannot provide enhanced SRS positioning function. In view of this, in order to enable a 5G lightweight terminal to also support SRS transmission of 100MHz, thereby providing enhanced SRS positioning function, embodiments of the present disclosure provide a method for SRS transmission.
Fig. 1 shows a specific implementation flow of an SRS transmission method according to some embodiments of the present disclosure, where the SRS transmission method may be performed by a 5G lightweight terminal. As shown in fig. 1, the SRS transmission method may include:
receiving configuration information from a base station in step 102;
in step 104, determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information;
in step 106, in response to determining to generate a narrowband SRS, generating an SRS baseband signal according to the configuration information;
in step 108, in response to determining to generate a wideband SRS, determining the SRS baseband signal from among pre-stored wideband SRS signals;
generating an SRS radio frequency signal based on the SRS baseband signal in step 110; and
in step 112, the SRS radio frequency signal is transmitted.
As can be seen from the implementation flow of the method, in the SRS transmission method disclosed in the embodiment of the present disclosure, when a narrowband SRS needs to be transmitted, the terminal may generate a narrowband SRS baseband signal to be transmitted by itself, and when a wideband SRS needs to be transmitted, the terminal may determine the wideband SRS baseband signal to be transmitted from the wideband SRS signals stored in advance, without generating in real time, so that the terminal may support transmission of the higher bandwidth SRS signal without increasing the cost of the terminal, that is, the lightweight terminal may support various enhanced SRS positioning functions.
The specific implementation method of each step in the SRS transmission method is described in detail below with further reference to specific examples.
In the 5G mobile communication system, a plurality of SRS Resource sets (ReS) may be configured according to the specifications of the existing 3GPP protocol. Wherein each ReS may contain 1 to multiple SRS resources. Specifically, each SRS resource may include {1,2,4} antenna ports. Further, in the time domain, SRS resources may be allocated in {1,2,4} consecutive symbols among the last 6 OFDM symbols of one Slot (Slot). In the frequency domain, it can be based on the size K of TCN TC Each SRS resource is mapped on a physical resource block in a comb-like manner. Wherein K is TC The value of (2, 4) may be. In addition, the SRS also supports 64 SRS bandwidth configurations, wherein the SRS bandwidth is minimum of 4RB and maximum of 272RB. Further, SRS is generally transmitted using ZC sequences as the SRS signal sequences. As such, different SRS ports may be distinguished from each other by occupying different OFDM symbols, or even by occupying the same OFDM symbol, may be distinguished from each other by selecting different frequency domain resources or by different cyclic shifts of the ZC sequence. Also, to further enhance the positioning capability of SRS, 3GPP specification release 16 specifies that in the time domain, SRS may be allocated {1,2,4,8,12} consecutive OFDM symbols, and the starting position of the symbols may be at any position within the slot; in addition, at frequencyOn the domain, a TCN value of 8 is further added.
As can be seen from the above, in order to implement the SRS generation and transmission process on the terminal side, the base station generally needs to configure the SRS resources used by each terminal. Specifically, the base station may respectively issue SRS configuration parameters of each terminal to each terminal through higher layer signaling as configuration information. The SRS configuration parameters described above may generally include: index C of antenna port, SRS occupying Resource Block (RB) in frequency domain SRS And B SRS OFDM symbol number occupied by SRS in time domain, transmission comb number K TC (Transmission Comb Number, TCN), SRS resource set configuration information, and so forth. The SRS resource set configuration information is used for identifying whether the current service is an SRS positioning enhancement scene or not. Specifically, when the configured SRS resource set is SRS-PosResource, the SRS resource set can be regarded as an SRS positioning enhancement scene; conversely, a non-SRS positioning enhanced scene may be considered.
In addition, the base station needs to send other configuration information of each terminal to each terminal through higher layer signaling. In these embodiments of the present disclosure, the configuration information may include: bandwidth Part (BWP). BWP is a new concept introduced by new air interfaces, intended to accommodate various different types of terminals. BWP is equivalent to dividing the spectrum of 5G into many small blocks in a certain time, and each BWP can use different parameter sets, and its bandwidth, subcarrier spacing, and other control parameters can be different. This is equivalent to dividing a plurality of sub-cells with different configurations in the 5G cell to adapt to different types of terminals and service types.
It can be seen that in the above step 102, the terminal may receive its own configuration information from the base station through higher layer signaling. These configuration information may include either the SRS configuration parameters described above, or other configuration information such as BWP.
After receiving the configuration information, the terminal may determine whether the terminal needs to generate a narrowband SRS or a wideband SRS according to the received configuration information in step 104. In some embodiments of the present disclosure, the terminal may determine whether to generate the narrowband SRS or the wideband SRS according to the BWP in the configuration information. The specific determination method can comprise the following steps: presetting a bandwidth threshold; comparing BWP in the configuration information with the bandwidth threshold; responsive to determining that BWP is greater than the bandwidth threshold, determining to generate a wideband SRS; in response to determining that BWP is less than or equal to the bandwidth threshold, it is determined to generate a narrowband SRS. In the embodiment of the present disclosure, the preset bandwidth threshold may be set according to a processing capability of the terminal. In this way, when the BWP configured by the base station is less than or equal to the bandwidth threshold, the terminal can be considered to have the capability of processing, and the SRS baseband signal is generated automatically; when the BWP configured by the base station is greater than the bandwidth threshold, the terminal may be considered to have no capability to process, so that the terminal is not required to generate the SRS baseband signal in real time at this time, but the wideband SRS baseband signal may be obtained in a simpler manner, thereby reducing the requirement on the computing capability of the terminal. For example, for the 5G lightweight terminal (RedCap), the bandwidth threshold may be set to 20MHz.
In some embodiments of the present disclosure, the execution time for the above step 106 or step 108 may be controlled by a timing controller provided inside the terminal. The timing controller is configured to determine a transmission time of the SRS signal, and trigger the terminal to execute step 106 or execute step 108 at the transmission time of the SRS signal. In these embodiments, if the above step 106 needs to be performed, the terminal will generate the SRS baseband signal according to the configuration information at the transmission time of the SRS signal. Alternatively, if the above step 108 is to be executed, the terminal determines the SRS baseband signal from the wideband SRS signals stored in advance at the SRS signal transmission timing. In these embodiments, after the step 106 or step 108 described above is performed, the subsequent step 110 will continue to be performed.
In other embodiments of the present disclosure, the step 106 or the step 108 may be performed before the transmission time of the SRS signal, that is, the step 106 or the step 108 is performed before the transmission time of the SRS signal arrives, so as to obtain the SRS baseband signal in advance. Then, the terminal caches the obtained SRS baseband signal until the trigger of the timing controller is received, and then the step 110 is executed, that is, the step 110 is executed again at the moment of sending the SRS signal.
The specific implementation of steps 106 and 108 is described in detail below.
Specifically, in the above step 106, the terminal may generate the SRS baseband signal according to the received configuration information by the following method. It is appreciated that in step 104 described above, the configuration information may include SRS configuration parameters. Specifically, first, the terminal will generate a ZC sequence according to SRS configuration parameters; then, mapping the generated ZC sequence to a frequency domain in a comb-shaped mode to obtain a frequency domain sequence; next, performing IFFT on the frequency domain sequence to obtain a time domain sequence; finally, a Cyclic Prefix (CP) is added to the time domain sequence to obtain the SRS baseband signal. In the embodiments of the present disclosure, the specific implementation method of each step may refer to the specification of the existing 3GPP protocol, and will not be described in detail herein.
For the above step 108, when it is determined that the wideband SRS needs to be generated, the terminal determines the SRS baseband signal from the pre-stored wideband SRS signals.
As described above, since the processing capability of the current 5G lightweight terminal can only support narrowband SRS, for example, support the generation and transmission of SRS signals with 20MHz bandwidth, but cannot support the generation and transmission of wideband SRS, when it is determined that wideband SRS needs to be generated, the 5G lightweight terminal cannot directly generate SRS baseband signals according to SRS configuration parameters, which is mainly limited by the maximum IFFT point number supported by the 5G lightweight terminal.
To this end, embodiments of the present disclosure provide a solution. In embodiments of the present disclosure, a base station may pre-configure a terminal with one or more sets of wideband SRS signals that it may use. Wherein each set of wideband SRS signals corresponds to one or a combination of configuration information. For example, each set of wideband SRS signals would correspond to a BWP setting; or each set of wideband SRS signals would correspond to a combination of a BWP setting and the number of OFDM symbols occupied by an SRS in the time domain, etc. After the configuration is completed, the base station and the terminal simultaneously store one or more groups of broadband SRS signals configured for the terminal and configuration information corresponding to the one or more groups of broadband SRS signals, that is, store a mapping relationship between the broadband SRS signals and the configuration information. In this way, after receiving the configuration information from the base station, the terminal can determine the corresponding wideband SRS signal according to the configuration information. In addition, the base station may further store a relationship between the identity of the terminal and the configured one or more sets of wideband SRS signals. In this way, the base station can determine which terminal transmits a wideband SRS signal after receiving the wideband SRS signal.
Based on the pre-configuration, the specific method for determining the SRS baseband signal from the pre-stored SRS signals by the terminal in the step 108 may be as shown in fig. 2, and mainly includes:
in step 202, the identity of the pre-stored wideband SRS signal is determined according to the configuration information.
In embodiments of the present disclosure, where multiple sets of wideband SRS signals are preconfigured, a unique identifier may be generated for each wideband SRS signal separately for convenience in managing the wideband SRS signals. In this way, the terminal can use the identifier of the wideband SRS signal to represent each wideband SRS signal when storing the wideband SRS signal and storing the mapping relation between the wideband SRS signal and the configuration information.
In step 204, storage locations of the corresponding wideband SRS signals are determined according to the identification of the wideband SRS signals.
In some embodiments of the present disclosure, a mapping relationship between the identifier of the wideband SRS signal and the storage location thereof may be recorded, so that the identifier of the wideband SRS signal may be used to find the mapping relationship, to obtain the storage location of the corresponding wideband SRS signal.
In other embodiments of the present disclosure, the storage location of the wideband SRS signal may be directly calculated from the identity of the wideband SRS signal. In this way, the storage position of the corresponding wideband SRS signal can be directly calculated according to the identification of the wideband SRS signal. For example, it may be configured that the wideband SRS signal is continuously stored in a storage space of the memory starting from a fixed starting position, and since the length of the wideband SRS signal is fixed, the storage position of the corresponding wideband SRS signal may be directly determined according to the identification of the wideband SRS signal. Such as wideband SRS signal identified as 1 is stored at this fixed starting location; the wideband SRS signal identified as 2 is stored at this fixed starting location plus the location determined by the length of the wideband SRS signal; … ….
In step 206, the wideband SRS signal is extracted from the memory as the SRS baseband signal according to the storage location of the wideband SRS signal.
In other embodiments of the present disclosure, the base station may also store an identification of the wideband SRS signal. In this way, the base station can directly carry the identifier of the wideband SRS signal in the configuration information, so as to configure the wideband SRS signal used by the terminal. In this case, the specific method for determining the SRS baseband signal from the pre-stored wideband SRS signal by the terminal in step 108 may include: determining a storage position of the broadband SRS signal according to the identification of the broadband SRS signal carried in the configuration information; and extracting the broadband SRS signal from the memory as the SRS baseband signal according to the storage position of the broadband SRS signal.
In further embodiments of the present disclosure, the base station may configure the terminal with only one wideband SRS signal, i.e. the terminal stores only one wideband SRS signal in advance. And, the base station will record the mapping relation between the wideband SRS signal and the terminal equipment identifier. In this way, when determining that wideband SRS needs to be transmitted, the terminal directly extracts the pre-stored wideband SRS signal as the SRS baseband signal. After receiving the SRS signal, the base station can determine which terminal transmits the SRS signal according to the mapping relationship between the recorded SRS signal and the terminal equipment identifier. It can be seen that the method is the simplest to operate, and has very low requirement on the processing capability of the hardware of the terminal, but can still enable the terminal to support the transmission of SRS signals with higher bandwidth so as to meet the requirements of various enhanced positioning scenes.
The embodiments of the present disclosure are not limited to the specific method for generating the pre-stored wideband SRS signal, and for example, the wideband SRS signal may be pre-generated by the base station side or may be pre-generated by a development platform at the time of system development. When generating the wideband SRS signal, all parameters required for wideband SRS signal generation and combinations of these parameters may be listed first; then, for each set of combinations of parameters, a wideband SRS signal is generated according to existing methods or other methods. As such, a plurality of wideband SRS signals may be generated for a combination of the plurality of sets of parameters. Wherein, the parameter combination corresponding to each wideband SRS signal can be used as a part of the configuration information. Finally, the base station configures the wideband SRS signals, for example, the wideband SRS signals and the corresponding parameter combinations are allocated to different terminals, and the terminal stores the wideband SRS signals and the corresponding parameter combinations configured to the terminal in its own memory. By the method, the terminal which does not support the broadband SRS can also use the broadband SRS, so that the enhanced SRS positioning function can be supported.
For the step 110, the terminal may directly perform signal modulation on the obtained SRS baseband signal to generate an SRS radio frequency signal. This applies to the case where step 106 or step 108 described above is performed when triggered by the timing controller. That is, an SRS baseband signal is generated or extracted at the transmission timing of the SRS signal, and then the SRS baseband signal is directly modulated to generate an SRS radio frequency signal, and then transmitted. In general, the processing capability of the terminal can support the real-time operation of the steps, and the delay can be ensured to be within a set range.
In addition, for the step 110, the terminal may perform the step 106 or 108 in advance, after obtaining the SRS baseband signal, buffer the obtained SRS baseband signal, and then perform signal modulation on the SRS baseband signal at the transmission time of the SRS signal, that is, when triggered by the timing controller, to generate the SRS radio frequency signal. The method can relieve communication pressure and communication time delay between the baseband module for generating the SRS baseband signal in the terminal and the radio frequency module for modulating the SRS baseband signal, and reduces the design requirement of a data interface between the terminal internal modules, so that the method is more suitable for the current 5G lightweight terminal and other lightweight terminals possibly occurring in the future.
For the above step 112, when transmitting the above SRS radio frequency signal, the terminal may transmit the SRS radio frequency signal generated only once over the air interface (air interface). Thus, the terminal completes the transmission of the SRS signal.
In other embodiments of the present disclosure, when transmitting the SRS radio frequency signal, in order to improve positioning accuracy, the terminal may choose to transmit the SRS radio frequency signal cyclically on the air interface. The number of times of cyclically transmitting the SRS radio frequency signal may be preset or determined according to actual requirements. For example, when the terminal moves to the edge of the coverage area of the base station, the terminal may choose to increase the number of times that the SRS radio frequency signal is transmitted cyclically. Thus, the base station can receive a plurality of identical SRS radio frequency signals sent by the same terminal. The base station combines the received SRS radio frequency signals, and the accuracy of positioning the terminal can be improved by utilizing the combination gain of the signals.
In further embodiments of the present disclosure, if the terminal supports cyclic transmission of the SRS radio frequency signal, the storage amount of the terminal storing the wideband SRS signal may be further reduced by the cyclic transmission method. In this case, the number of times of cyclically transmitting the SRS radio frequency signal may be determined according to the number of OFDM symbols occupied in the time domain by the SRS in the SRS configuration parameter issued by the base station. Specifically, as previously described, 3GPP specification release 16 specifies that in the time domain, SRS may be transmitted over {1,2,4,8,12} consecutive OFDM symbols allocated within one slot, and the starting position of the symbol may be at any position within the slot. Thus, for the same other configuration parameters, but different SRS occupies the OFDM symbol number in the time domain, the terminal may need to store a plurality of wideband SRS signals in advance. For example, for a bandwidth requirement that is also 100MHz, the following 5 SRS signals may need to be stored: occupying 1 OFDM symbol on one slot; occupy 2 consecutive OFDM symbols on one slot; occupy 4 consecutive OFDM symbols on one slot; occupying 8 consecutive OFDM symbols on one slot; and occupies 12 consecutive OFDM symbols on one slot. Such a storage scheme is a challenge for the storage space of the terminal when the combination of configuration parameters is relatively large.
In order to reduce the storage capacity of the terminal for storing the wideband SRS signal, the terminal may store only one wideband SRS signal for different OFDM symbol number requirements. This wideband SRS signal typically corresponds to a combination of configuration parameters when 1 OFDM symbol is occupied on one slot. However, in this case, when the mapping relationship between the configuration information and the pre-stored wideband SRS signal is established, a mapping relationship of many to one is established, that is, the configuration parameter combinations corresponding to different OFDM symbol number requirements all correspond to the same SRS signal. In this way, when a wideband SRS signal stored in advance is selected, the same wideband SRS signal, that is, an SRS corresponding to 1 OFDM symbol occupied in the time domain is generally extracted from the memory regardless of the number of OFDM symbols occupied in the time domain by the SRS to be configured. However, in order to compensate for the difference in the requirements for the number of OFDM symbols between the configuration information and the stored wideband SRS, when transmitting the SRS radio frequency signal, the terminal will cyclically transmit the SRS radio frequency signal according to the number of OFDM symbols occupied by the configured SRS in the time domain, so as to meet the requirements of the base station.
Still to illustrate with the above example, in this example, there are 5 OFDM symbol count requirements for {1,2,4,8,12} consecutive OFDM symbols for a bandwidth requirement that is also 100 MHz. The terminals corresponding to the 5 OFDM symbol number requirements only store one wideband SRS signal (the wideband SRS signal actually corresponds to the SRS with the OFDM symbol number requirement of 1), and a mapping relation between the 5 OFDM symbol number requirements and the same wideband SRS signal is established. In this way, when the requirement of the number of OFDM symbols in the configuration information issued by the base station is 1, the broadband SRS signal can be directly extracted and sent for 1 time on an air interface after radio frequency processing; when the requirement of the number of OFDM symbols in the configuration information issued by the base station is 2, the broadband SRS signal can be still extracted and is circularly transmitted for 2 times on an air interface after radio frequency processing, so that the requirement that the base station requires the SRS to occupy 2 continuous OFDM symbols on one time slot is met; … …; when the requirement of the number of OFDM symbols in the configuration information issued by the base station is 12, the broadband SRS signal can still be extracted and is circularly transmitted for 12 times on an air interface after radio frequency processing, so that the requirement that the SRS occupies 12 continuous OFDM symbols on one time slot is met by the base station. In the above scheme, different requirements of the OFDM symbol numbers can correspond to the same broadband SRS signal stored in advance, and the requirement that the base station needs to occupy a plurality of OFDM symbols in the time domain of the SRS is met in a cyclic transmission mode, and the plurality of broadband SRS signals are not required to be stored, so that the requirement on the storage space of the terminal can be greatly reduced, and the purposes of saving the storage space of the terminal and reducing the cost of the terminal are achieved.
Based on the same inventive concept, the present disclosure also provides a terminal corresponding to the method of any embodiment. Fig. 3 illustrates a functional structure of a terminal according to some embodiments of the present disclosure. As shown in fig. 3, the terminal includes:
a configuration information receiving module 302, configured to receive configuration information from a base station;
a baseband module 304, configured to determine whether to generate a narrowband SRS or a wideband SRS according to the configuration information; generating SRS baseband signals according to the configuration information in response to determining to generate the narrowband SRS; in response to determining to generate a wideband SRS, determining the SRS baseband signal from among pre-stored wideband SRS signals;
a radio frequency module 306, configured to receive the SRS baseband signal from the baseband module, and generate an SRS radio frequency signal based on the SRS baseband signal; and
and a transmitting antenna 308, configured to transmit the SRS radio frequency signal.
In an embodiment of the present disclosure, the baseband module may include: control section 3042, narrowband SRS signal generator 3044, and wideband SRS signal generator 3046.
Wherein, the control unit 3042 is configured to determine whether to generate a narrowband SRS or a wideband SRS according to the configuration information; in response to determining to generate the narrowband SRS, triggering the narrowband SRS signal generator 3044 to operate; in response to determining to generate the wideband SRS, the wideband SRS signal generator 3046 is triggered to operate.
The narrowband SRS signal generator 3044 is configured to generate an SRS baseband signal according to the configuration information.
The wideband SRS signal generator 3046 is configured to determine the SRS baseband signal from the wideband SRS signals stored in advance.
Fig. 4 shows a functional structure of a terminal according to other embodiments of the present disclosure. In the example shown in fig. 4, the terminal may further include: and the timing controller 310 is configured to trigger the baseband module to operate at the SRS signal transmission time.
Fig. 5 shows a functional structure of a terminal according to other embodiments of the present disclosure. In the example shown in fig. 4, the terminal may further include: and the timing controller 310 is configured to trigger the radio frequency module 306 to operate at the SRS signal transmission time.
Further, in the example shown in fig. 5, the radio frequency module 306 may include: the buffer 3062 and the rf processing unit 3064.
The buffer 3062 is configured to buffer the SRS baseband signal.
The radio frequency processing unit 3064 is configured to generate an SRS radio frequency signal based on the buffered SRS baseband signal under the triggering of the timing controller 310.
In still other embodiments of the present disclosure, the terminal may further include: and a cyclic transmission control unit, configured to control the transmitting antenna 308 to cyclically transmit the SRS radio frequency signal.
Based on the same inventive concept, the present disclosure also provides an electronic device corresponding to the method of any embodiment, including a memory, a processor, and a computer program stored on the memory and capable of running on the processor, where the processor implements the sounding reference signal transmitting method of any embodiment when executing the program.
Fig. 6 shows a more specific hardware architecture of an electronic device according to this embodiment, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 implement communication connections therebetween within the device via a bus 1050.
The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit ), microprocessor, application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits, etc. for executing relevant programs to implement the technical solutions provided in the embodiments of the present disclosure.
The Memory 1020 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory ), static storage device, dynamic storage device, or the like. Memory 1020 may store an operating system and other application programs, and when the embodiments of the present specification are implemented in software or firmware, the associated program code is stored in memory 1020 and executed by processor 1010.
The input/output interface 1030 is used to connect with an input/output module for inputting and outputting information. The input/output module may be configured as a component in a device (not shown in the figure) or may be external to the device to provide corresponding functionality. Wherein the input devices may include a keyboard, mouse, touch screen, microphone, various types of sensors, etc., and the output devices may include a display, speaker, vibrator, indicator lights, etc.
Communication interface 1040 is used to connect communication modules (not shown) to enable communication interactions of the present device with other devices. The communication module may implement communication through a wired manner (such as USB, network cable, etc.), or may implement communication through a wireless manner (such as mobile network, WIFI, bluetooth, etc.).
Bus 1050 includes a path for transferring information between components of the device (e.g., processor 1010, memory 1020, input/output interface 1030, and communication interface 1040).
It should be noted that although the above-described device only shows processor 1010, memory 1020, input/output interface 1030, communication interface 1040, and bus 1050, in an implementation, the device may include other components necessary to achieve proper operation. Furthermore, it will be understood by those skilled in the art that the above-described apparatus may include only the components necessary to implement the embodiments of the present description, and not all the components shown in the drawings.
The electronic device of the foregoing embodiment is configured to implement the corresponding SRS generating or transmitting method in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiment, which is not described herein.
Based on the same inventive concept, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the SRS generation or transmission method according to any of the above embodiments, corresponding to any of the above embodiments.
The non-transitory computer readable storage media described above can be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.
The storage medium of the above embodiment stores computer instructions for causing the computer to perform the SRS generating or transmitting method according to any one of the above exemplary method sections, and has the advantages of the corresponding method embodiments, which are not described herein.
Those skilled in the art will appreciate that embodiments of the present disclosure may be implemented as a system, method, or computer program product. Accordingly, the present disclosure may be embodied in the following forms, namely: all hardware, all software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software, is generally referred to herein as a "circuit," module, "or" system. Furthermore, in some embodiments, the present disclosure may also be embodied in the form of a computer program product in one or more computer-readable media, which contain computer-readable program code.
Any combination of one or more computer readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive example) of the computer-readable storage medium could include, for example: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer, for example, through the internet using an internet service provider.
It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
Furthermore, although the operations of the methods of the present disclosure are depicted in the drawings in a particular order, this is not required to or suggested that these operations must be performed in this particular order or that all of the illustrated operations must be performed in order to achieve desirable results. Rather, the steps depicted in the flowcharts may change the order of execution. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform.
Use of the verb "comprise," "include" and its conjugations in this application does not exclude the presence of elements or steps other than those stated in the application. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
While the spirit and principles of the present disclosure have been described with reference to several particular embodiments, it is to be understood that this disclosure is not limited to the particular embodiments disclosed nor does it imply that features in these aspects are not to be combined to benefit from this division, which is done for convenience of description only. The disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (18)
1. A sounding reference signal SRS transmission method includes:
receiving configuration information from a base station;
determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information;
generating SRS baseband signals according to the configuration information in response to determining to generate the narrowband SRS;
in response to determining to generate a wideband SRS, determining the SRS baseband signal from among pre-stored wideband SRS signals;
generating an SRS radio frequency signal based on the SRS baseband signal; and
and sending the SRS radio frequency signal.
2. The method of claim 1, wherein the configuration information comprises: partial bandwidth BWP; wherein,
the determining whether to generate the narrowband SRS or the wideband SRS according to the configuration information comprises:
comparing the BWP with a preset bandwidth threshold;
responsive to determining that the BWP is greater than the bandwidth threshold, determining to generate a wideband SRS; and
in response to determining that the BWP is less than or equal to the bandwidth threshold, a narrowband SRS is determined to be generated.
3. The method of claim 1, wherein,
the generating the SRS baseband signal according to the configuration information includes: generating SRS baseband signals according to the configuration information at the sending moment of the SRS signals; and
The determining the SRS baseband signal from the pre-stored wideband SRS signal includes: at the transmission time of the SRS signal, the SRS baseband signal is determined from the broadband SRS signal stored in advance.
4. A method according to claim 1 or 3, wherein the configuration information comprises: SRS configuration parameters; wherein,
the generating the SRS baseband signal according to the configuration information includes:
generating a ZC sequence according to the SRS configuration parameters;
mapping the ZC sequence to a frequency domain in a comb-shaped mode to obtain a frequency domain sequence;
performing Inverse Fast Fourier Transform (IFFT) on the frequency domain sequence to obtain a time domain sequence; and
and adding a cyclic prefix CP to the time domain sequence to obtain the SRS baseband signal.
5. A method according to claim 1 or 3, wherein said determining an SRS baseband signal from a pre-stored wideband SRS signal comprises:
determining the identification of a broadband SRS signal corresponding to configuration information based on the mapping relation between the configuration information and the identification of a pre-stored SRS signal;
determining a storage position of the broadband SRS signal according to the identification of the broadband SRS signal; and
and extracting the corresponding broadband SRS signal from a memory according to the storage position of the broadband SRS signal to serve as the SRS baseband signal.
6. A method according to claim 1 or 3, wherein the configuration information comprises: identification of wideband SRS signals; wherein,
the determining the SRS baseband signal from the pre-stored wideband SRS signal includes:
determining a storage position of the broadband SRS signal according to the identification of the broadband SRS signal; and
and extracting the corresponding broadband SRS signal from a memory according to the storage position of the broadband SRS signal to serve as the SRS baseband signal.
7. A method according to claim 1 or 3, wherein said determining an SRS baseband signal from a pre-stored wideband SRS signal comprises:
and extracting a pre-stored broadband SRS signal as the SRS baseband signal.
8. The method of claim 3, wherein the generating SRS radio frequency signal based on the SRS baseband signal comprises:
and carrying out signal modulation on the SRS signal to generate the SRS radio frequency signal.
9. The method of claim 1, wherein the generating SRS radio frequency signal based on the SRS baseband signal comprises:
buffering the SRS baseband signal; and
and at the sending moment of the SRS signal, carrying out signal modulation on the SRS signal to generate the SRS radio frequency signal.
10. The method of claim 1, wherein the transmitting the SRS radio frequency signal comprises: and circularly transmitting the SRS radio frequency signals.
11. A terminal, comprising:
a configuration information receiving module for receiving configuration information from a base station;
the baseband module is used for determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information; generating SRS baseband signals according to the configuration information in response to determining to generate the narrowband SRS; in response to determining to generate a wideband SRS, determining the SRS baseband signal from among pre-stored wideband SRS signals;
the radio frequency module is used for receiving the SRS baseband signal from the baseband module and generating an SRS radio frequency signal based on the SRS baseband signal; and
and the transmitting antenna is used for transmitting the SRS radio frequency signals.
12. The terminal of claim 11, wherein the baseband module comprises: the device comprises a control unit, a narrowband SRS signal generator and a broadband SRS signal generator; wherein,
the control unit is used for determining whether to generate a narrowband SRS or a wideband SRS according to the configuration information, and triggering the narrowband SRS signal generator to work in response to the determination of the generation of the narrowband SRS; in response to determining to generate a wideband SRS, triggering the wideband SRS signal generator to operate;
the narrowband SRS signal generator is used for generating the SRS baseband signal according to the configuration information; and
The wideband SRS signal generator is configured to determine the SRS baseband signal from a pre-stored wideband SRS signal.
13. The terminal of claim 11, further comprising: and the timing controller is used for triggering the baseband module to work at the SRS signal sending moment.
14. The terminal of claim 11, further comprising: and the timing controller is used for triggering the radio frequency module to work at the SRS signal sending moment.
15. The terminal of claim 14, wherein the radio frequency module comprises: a buffer and a radio frequency processing unit; wherein,
the buffer is used for buffering the SRS baseband signal;
the radio frequency processing unit is used for generating SRS radio frequency signals based on the buffered SRS baseband signals under the triggering of the timing controller.
16. The terminal of claim 11, further comprising: and the cyclic transmission control unit is used for controlling the transmitting antenna to cyclically transmit the SRS radio frequency signals.
17. A computer device, comprising:
one or more processors, memory; and
one or more programs;
wherein the one or more programs are stored in the memory and executed by the one or more processors, the programs comprising instructions for performing the sounding reference signal transmission method of claim 1.
18. A non-transitory computer-readable storage medium containing a computer program, which when executed by one or more processors, causes the processors to perform the sounding reference signal transmission method of claim 1.
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