CN117321950A - Method for determining initial position of SRS partial frequency detection frequency domain - Google Patents

Abstract

A wireless communication method is disclosed that includes receiving configuration information via Downlink Control Information (DCI) or higher layer signaling, the configuration information including frequency sounding with a Sounding Reference Signal (SRS) configuration. The method also includes configuring a partial frequency sounding with SRS transmission based on the configuration information and determining a frequency domain starting position of the SRS for the partial frequency sounding. In other aspects, a terminal and a system are also disclosed.

Description

Method for determining initial position of SRS partial frequency detection frequency domain

Technical Field

One or more embodiments disclosed herein relate to mechanism(s) for defining a starting position in a frequency domain for a Sounding Reference Signal (SRS) configured with partial band sounding.

Background

The SRS is a reference signal of a base station for determining channel quality of an uplink channel of each sub-portion of a frequency region. In the 5G New Radio (NR) technology, new requirements for further enhancing SRS transmission are being determined. The new item in release 17 relates to, for example, NR Multiple Input Multiple Output (MIMO).

In new research being conducted, enhancement of SRS is directed to both Frequency Ranges (FR) 1 and FR 2. In particular, research is underway to identify and specify enhancements to aperiodic SRS triggers to facilitate more flexible triggers and/or Downlink Control Information (DCI) overhead/usage reduction.

In addition, studies are underway to specify SRS switching for up to 8 antennas (e.g., xTyR, x= {1,2,4} and y= {6,8 }).

Furthermore, studies are evaluating and if desired, specifying the following mechanism(s) to enhance SRS capacity and/or coverage, including SRS time bundling, increased SRS repetition, and/or partial sounding across frequencies. In this work, mechanisms are being discussed how to introduce partial sounding across frequencies to enhance SRS coverage and capacity.

More specifically, in 3GPP RAN1#104-e [ 2]]Has been agreed upon for partial frequency sounding of SRS. In one Orthogonal Frequency Division Multiplexing (OFDM) symbolP under the condition of SRS transmission in continuous Resource Blocks (RBs) _F The value of (2) [ 3]]At least one of 4,8 }. />Indication by B _SRS And C _SRS Number of configured RBs. During transmission, no new sequence including length is introduced. Future studies may be made on further topics including non-integer values for SRS transmission, suitability for frequency hopping and non-frequency hopping, and determination of RB position and P _F Is described in detail. In this application, a method of defining a frequency domain start position of SRS partial frequency sounding is considered.

CITATION LIST

Non-patent reference

Non-patent reference 13 gpp RP 193133, "New WID: further enhancements on MIMO for NR ", 12 months 2019.

[ non-patent reference 2]3GPP RAN1#104-e, "Chairman's Notes", month 2 of 2021.

[ non-patent document 3]3GPP TS 38.211, "NR; physical channels and modulation (Release 16) ".

Disclosure of Invention

One or more embodiments of the present invention provide a wireless communication method including: reception via Downlink Control Information (DCI) or higher layer signaling includes configuration information for frequency sounding with Sounding Reference Signal (SRS) configuration, configuring a partial frequency sounding based on the configuration information, and determining a frequency domain starting position of the SRS partial frequency sounding.

In one aspect, the configuration information is signaled through Radio Resource Control (RRC) signaling.

In one aspect, the configuration information is dynamically updated/configured by one of Downlink Control Information (DCI) and a medium access control element (MAC-CE).

Other embodiments and advantages of the invention will be appreciated from the description and drawings.

Drawings

Fig. 1 is a diagram showing a schematic configuration of a wireless communication system according to an embodiment.

Fig. 2 is a diagram showing a schematic configuration of a base station according to an embodiment.

Fig. 3 is a schematic configuration of a UE according to an embodiment.

Fig. 4 is a table of SRS sounding bandwidths.

Fig. 5 shows an example of SRS bandwidth configuration.

Fig. 6 shows an example of a frequency domain start position.

Fig. 7 shows an example of partial frequency sounding with SRS.

Fig. 8 shows an example of a frequency domain start position for partial frequency probing.

Fig. 9 is a portion of fig. 8.

Fig. 10 shows an example of a frequency domain start position for partial frequency probing.

Fig. 11 shows an example of the configuration of parameters.

Fig. 12 shows an example of the configuration of parameters.

Fig. 13 shows an example of the configuration of parameters.

Fig. 14 shows an example of the configuration of parameters.

Fig. 15 shows an example of a frequency domain start position for partial frequency detection.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. For consistency, like elements in the various figures are denoted by like reference numerals.

In the following description of embodiments of the invention, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid obscuring the invention.

Fig. 1 depicts a wireless communication system 1 in accordance with one or more embodiments of the present invention. The wireless communication system 1 includes a User Equipment (UE) 10, a Base Station (BS) 20, and a core network 30. The wireless communication system 1 may be an NR system. The wireless communication system 1 is not limited to the specific configuration described herein, and may be any type of wireless communication system, such as an LTE/LTE-advanced (LTE-a) system.

The BS20 may transmit Uplink (UL) and Downlink (DL) signals with the UE 10 in a cell of the BS20. The DL and UL signals may include control information and user data. BS20 may communicate DL and UL signals with core network 30 over backhaul link 31. BS20 may be a gndeb (gNB). The BS20 may be referred to as a Network (NW) 20.

The BS20 includes an antenna, a communication interface (e.g., X2 interface) for communicating with the neighboring BS20, a communication interface (e.g., S1 interface) for communicating with the core network 30, and a CPU (central processing unit), such as a processor or a circuit for processing signals transmitted and received with the UE 10. The operation of the BS20 may be implemented by a processor processing or executing data and programs stored in a memory. However, the BS20 is not limited to the hardware configuration set forth above, and may be implemented by other suitable hardware configurations as understood by those of ordinary skill in the art. A plurality of BSs 20 may be provided so as to cover a wider service area of the wireless communication system 1.

The UE 10 may transmit DL and UL signals including control information and user data with the BS20 using a Multiple Input Multiple Output (MIMO) technique. The UE 10 may be a mobile station, a smart phone, a cellular phone, a tablet computer, a mobile router, or an information processing apparatus having a radio communication function, such as a wearable device. The wireless communication system 1 may include one or more UEs 10.

The UE 10 includes a CPU such as a processor, a RAM (random access memory), a flash memory, and a radio communication device to transmit/receive radio signals to/from the BS20 and the UE 10. For example, the operations of the UE 10 described below may be implemented by the CPU processing or executing data and programs stored in the memory. However, the UE 10 is not limited to the above hardware configuration, and may be configured with, for example, a circuit for realizing the processing described below.

As shown in fig. 1, the BS20 may transmit CSI reference signals (CSI-RS) to the UE 10. In response, the UE 10 may send a CSI report to the BS20. Similarly, the UE 10 may transmit SRS to the BS20.

(configuration of BS)

The BS20 according to an embodiment of the present invention will be described below with reference to fig. 2. Fig. 2 is a diagram showing a schematic configuration of the BS20 according to an embodiment of the present invention. BS20 may include a plurality of antennas (antenna element groups) 201, an amplifier 202, a transceiver (transmitter/receiver) 203, a baseband signal processor 204, a call processor 205, and a transmission path interface 206.

User data transmitted from the BS20 to the UE 20 on DL is input from the core network into the baseband signal processor 204 through the transmission path interface 206.

In the baseband signal processor 204, the signals are subjected to Packet Data Convergence Protocol (PDCP) layer processing, radio Link Control (RLC) layer transmission processing such as user data partitioning and coupling and RLC retransmission control transmission processing, medium Access Control (MAC) retransmission control including, for example, HARQ transmission processing, scheduling, transport format selection, channel coding, inverse Fast Fourier Transform (IFFT) processing, and precoding processing. The resulting signal is then transmitted to each transceiver 203. For the signal of the DL control channel, transmission processing including channel coding and inverse fast fourier transform is performed, and the resulting signal is transmitted to each transceiver 203.

The baseband signal processor 204 informs each UE 10 of control information (system information) for communication in a cell through higher layer signaling, such as Radio Resource Control (RRC) signaling and a broadcast channel. The information for communication in the cell includes, for example, UL or DL system bandwidth.

In each transceiver 203, the baseband signal precoded for each antenna and output from the baseband signal processor 204 is subjected to frequency conversion processing into the radio frequency band. The amplifier 202 amplifies the radio frequency signal that has undergone frequency conversion, and transmits the resulting signal from the antenna 201.

For data to be transmitted from the UE 10 to the BS20 on UL, a radio frequency signal is received in each antenna 201, amplified in an amplifier 202, subjected to frequency conversion and converted into a baseband signal in a transceiver 203, and input to a baseband signal processor 204.

The baseband signal processor 204 performs FFT processing, IDFT processing, error correction decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing on user data included in a received baseband signal. The resulting signal is then transmitted to the core network via the transmission path interface 206. The call processor 205 performs call processing such as setting up and releasing a communication channel, managing the state of the BS20, and managing radio resources.

(configuration of UE)

A UE 10 according to an embodiment of the present invention will be described below with reference to fig. 3. Fig. 3 is a schematic configuration of the UE 10 according to an embodiment of the present invention. The UE 10 has a plurality of UE antennas 101, an amplifier 102, a circuit 103 including a transceiver (transmitter/receiver) 1031, a controller 104, and an application 105.

For DL, the radio frequency signals received in the UE antenna S101 are amplified in the respective amplifiers 102 and subjected to frequency conversion of baseband signals in the transceiver 1031. In the controller 104, these baseband signals are subjected to reception processing such as FFT processing, error correction decoding, retransmission control, and the like. DL user data is transferred to the application 105. The application 105 performs processing related to higher layers above the physical layer and the MAC layer. In the downlink data, broadcast information is also transmitted to the application 105.

UL user data, on the other hand, is input from the application 105 to the controller 104. In the controller 104, retransmission control (hybrid ARQ) transmission processing, channel coding, precoding, DFT processing, IFFT processing, and the like are performed, and the resulting signal is transmitted to each transceiver 1031. In the transceiver 1031, the baseband signal output from the controller 104 is converted into a radio frequency band. Thereafter, the frequency-converted radio frequency signal is amplified in an amplifier 102 and then transmitted from an antenna 101.

As described above, consideration is given with respect to SRS partial frequency sounding. One or more embodiments described herein may provide a method for defining a frequency domain start position for SRS partial frequency sounding.

In one or more embodiments, the SRS bandwidth may be configured based on the values shown in fig. 4. Specifically, FIG. 4 focuses on having index value C _SRS 13. In this example, there may be a single Bandwidth (BW) region for SRS with a length of 48 RBs. Alternatively, there may be two BW areas for SRS, each BW area having a length of 24 RBs. Alternatively, there may be four BW areas for SRS, each BW area having a length of 12 RBs. Still alternatively, there may be twelve regions for SRS, each region having a length of 4 RBs. In other words, with different SRS bandwidths, the available bandwidth may be divided into a different number of portions. These features may be useful in SRS hopping when the SRS transmission is split into a series of narrowband transmissions that cover the entire bandwidth region of interest. And C _SRS And B _SRS The value of (c) may be configured by higher layer signaling.

FIG. 5 depicts a diagram illustrating a view based on FIG. 4One or more embodiments of the SRS bandwidth configuration of the examples. Index C _SRS Configuring SRS bandwidth set as described above while B _SRS One bandwidth is selected from the set of configurations and the available bandwidth is divided into a different number of portions. Specifically, with B _SRS Increasing and decreasing the size of the partition. In other words, as the number of detection bands increases, the number of frequency partitions also increases.

Fig. 6 shows an example of a frequency domain start position. The frequency domain starting position of the SRS may be determined by a cell specific SRS bandwidth configuration configured by higher layer signaling. Specifically, as illustrated in FIG. 6, the starting position may be determined based on equation (1)

Wherein the method comprises the steps of

For the purposes of explanation,is based on n _shift Calculated value +.>And->The frequency domain shift value of the SRS allocation is adjusted with respect to the reference grid point and transmitted via higher layer signaling. />Indicating the number of subcarriers in the RB. />Is the transmission comb parameter offset.

In addition, in the case of the optical fiber,is the length of the sounding reference signal sequence. More specifically, based on m _SRS,b 、/>、K _TC And B _SRS To determine->m _SRS,b And N _b The values of (2) are given in the selected row of figure 4. As described above (I)>Indicating the number of subcarriers in the RB. K (K) _TC Is a transport comb parameter specified by higher layer signaling. B is selected from {0,1,2,3} given by the fields contained in the higher layer parameters _SRS 。

As described above, N is given in the selected row of fig. 4 _b Values. For the purpose of explanation, when the frequency hopping parameter b _hop Greater than or equal to B _SRS Frequency hopping can be disabled and the frequency position index n for all OFDM symbols of SRS resources defined in the above equation _b Is kept at a constant value. N in the above equation _RRC Representing the frequency domain location.

Thus, the frequency domain starting position can be defined based on the above equation and parameters

In one or more embodiments referring to the example shown in fig. 7, partial frequency sounding with SRS may be performed. In particular, using higher layer signaling or DCI, the UE is configured to consider partial bandwidth SRS transmission. One or more potential advantages of partial frequency probing include the following possibilities.

Partial band sounding (or partial frequency sounding) provides a way to boost the power per subcarrier compared to full band sounding, since the available transmit power is allocated over a smaller bandwidth partition. In addition, it enhances SRS capacity because it provides the network with an opportunity to multiplex more UE ports on the remaining frequency resources.

To illustrate, in the example shown in fig. 7, a legacy SRS transmission having 24 RBs is configured with partial frequency sounding. After partial SRS configuration, SRS transmission may be completed over only half of the available bandwidth within each hop.

One or more potential drawbacks may be that frequency selective scheduling over the entire DL transmission bandwidth may not be feasible because the entire frequency band is not probed from SRS transmissions within the slot. Furthermore, due to partial frequency probing, the NW may not be able to extract the interfering structure of the channel.

Fig. 8 illustrates an example of a frequency domain starting position for partial frequency probing in accordance with one or more embodiments. As shown in fig. 8, only the configured SRS sounding bandwidth is consideredFor UL sounding. More specifically, in the example of fig. 8, P of the actual SRS sounding bandwidth is determined _F The factor is 2. Therefore, only the configured bandwidth is considered +.>Half of (a) is used for UL sounding. Therefore, in order to identify the frequency domain starting position for partial frequency detection, an additional parameter +.>

Fig. 9 is a partial frequency detecting section of fig. 8. In order to determine the frequency domain starting position of the partial frequency as shown in fig. 9, a new equation may be required. In view of the above discussion, the equation for the length of the SRS sequence of fig. 6 may need to be updated as follows:

wherein P is _F ∈{2,3,4,8}。

In the above equation, if P _F Not configured, P _F Will have a value of 1 and this equation will be the same as the equation for the SRS sequence length captured in fig. 6. In addition, when determining the starting position of the partial frequency detection,may be defined as in fig. 6.

Furthermore, as described above, additional parameters may need to be configuredTo identify the starting position of the sounding band using higher layer signaling or DCI. Thus, the equation for the frequency domain starting position of the SRS partial frequency sounding of fig. 6 may need to be updated as follows:

in the above equation, if the parameters areIs not configured, then->Will have a value of 0 and this equation can be considered for determining the starting position and correlating withThe equations for the frequency domain starting position of fig. 6 are the same. Note that here is +>Given in Physical Resource Elements (PRE). However, the parameter may also be given in Physical Resource Blocks (PRBs). In this case, it may be necessary to modify the equation accordingly. Optionally, ->May be configured as a common value for all ports. In other words, in the alternative,furthermore, this embodiment may be used to determine the frequency domain starting position for SRS hopping and non-hopping cases.

Fig. 10 illustrates another example of a frequency domain starting position for partial frequency probing in accordance with one or more embodiments. In the example of FIG. 10, onlyBits are configured by higher layer signaling or DCI +.>And P is _F Is configured to be 4 (thus 2 bits are used to configure +.>). Thus, as shown in fig. 10, there may be four possible frequency domain starting positions for SRS partial frequency sounding.

Based on the configurationThe frequency domain starting position of the partial frequencies of fig. 10 can be calculated as follows:

in the above equation, if the parameters areIs not configured, then->Will have a value of 0. Optionally, ->May be configured as a common value for all ports. In other words, a->

Alternatively, in one or more embodiments, higher layer signaling or DCI, parameters are usedIs configured to identify the frequency domain starting position of the partial frequency as follows:

in the above equation, if the parameters areIs not configured, then->Will have a value of 0. Optionally, ->May be configured as a common value for all ports. In other words, a->Furthermore, this embodiment may be used to determine the frequency domain starting position for SRS hopping and non-hopping cases.

In view of the above, it may be necessary to introduce new RRC parameters to configure the value of γ. In the example of fig. 11, the new RRC parameter may be pfsfreqdomain position with integer values of 0-67 in accordance with one or more embodiments. Note that the new RRC parameter may be configured for each SRS resource or each set of SRS resources, where each set of resources may include multiple SRS resources transmitted at different symbols. In addition, this embodiment may be used to determine the frequency domain starting position for both SRS hopping and non-hopping scenarios.

Fig. 12 illustrates an example of a configuration of parameter γ in accordance with one or more embodiments. Specifically, the value γ may be implicitly configured by associating the value γ with a DCI code point of an SRS request field triggering DCI. As shown in fig. 12, DCI code points of the SRS request field may have binary values of "00", "01", "10", and "11", which correspond to γ configured using RRC signaling ₁ 、γ ₂ And gamma ₃ And (when the DCI code point of the SRS request field is "00", the SRS resource set is not selected). The associated RRC parameters for configuring γ remain pfsfreqdomain position as previously defined. In addition, this embodiment may be used to determine the frequency domain starting position for both SRS hopping and non-hopping scenarios.

Fig. 13 illustrates an example of a configuration of parameter γ in accordance with one or more embodiments. Specifically, as described above, each SRS resource set may be associated with a particular γ value. As a result, the NW can implicitly configure specific values of the parameters by selecting an appropriate SRS resource set using DCI code points. As shown in the example of fig. 13, each SRS resource set in the table has a specific γ value (e.g., configured using RRC signaling). Then, by selecting a particular SRS resource set from the table, the NW can implicitly configure the value of γ. Alternatively, if aperiodic SRS (a-SRS) triggering is completed using DCI without data/CSI scheduling, unused fields in DCI format 0_1/0_2 may be reused to indicate the γ value. In addition, this embodiment may be used to determine the frequency domain starting position for both SRS hopping and non-hopping scenarios.

Fig. 14 illustrates an example of a configuration of parameter γ in accordance with one or more embodiments. In this example, it is possible to makeThe value of parameter gamma is explicitly configured with the code point of the new DCI field. For example, the code points for the new DCI fields may have binary values "00", "01", "10", and "11", which correspond to γ ₁ 、γ ₂ 、γ ₃ And gamma ₄ . In addition, this embodiment may be used to determine the frequency domain starting position for both SRS hopping and non-hopping scenarios.

Fig. 15 illustrates an example of a frequency domain starting position for partial frequency probing in accordance with one or more embodiments. In particular, considering using higher layer signaling or a bitmap of DCI, a UE may be configured with a set of consecutive RBs for SRS transmission within a configured SRS bandwidth. As shown in the example of figure 15 of the drawings,p _F =2. Then, using the bitmap, the NW may select a set of consecutive RBs for SRS transmission. In this example, set 000111111000 indicates that 1 represents SRS transmission RB as indicated by SRS resource allocation.

In addition, in this example, the number of cells,the equation may be used to determine the frequency domain starting position (same as the equation used for fig. 6).

In the same example configured with a set of consecutive RBs for SRS transmission, fig. 15 shows an example in which the index of the starting RB is 4. In this example, the index of the starting RB may be dynamically changed using DCI or higher layer signaling such as MAC-CE, RRC, etc. In addition, this embodiment may be used to determine the frequency domain starting position for both SRS hopping and non-hopping scenarios.

The above-described embodiments with respect to SRS partial frequency sounding may only apply when the corresponding UE capabilities have been reported and when the corresponding higher layer parameters are configured. For example, as part of its capability report, the UE reports whether it can perform SRS partial frequency sounding. As another example, as part of its capability report, the UE reports what P it can support when configured with SRS partial frequency sounding _F Values. When the UE reports its capabilities, the NW may then configureSRS partial frequency sounding. Those skilled in the art will appreciate that additional scenarios may be applicable when adding and/or configuring corresponding higher layer parameters.

Variants

Information, signals, and/or other elements described in this specification may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof, all of which may be referenced throughout the description contained herein.

Further, information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer. Information, signals, etc. may be input and/or output via a plurality of network nodes.

The input and/or output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed by using a management table. Information, signals, etc. to be input and/or output may be rewritten, updated, or appended. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to another device.

The reporting of information is in no way limited to the aspects/embodiments described in this specification, and other methods may also be used. Reporting of information may be accomplished, for example, by using physical layer signaling (e.g., downlink Control Information (DCI), uplink Control Information (UCI), higher layer signaling (e.g., RRC (radio resource control) signaling, broadcast information (master information block (MIB), system Information Block (SIB), etc.), MAC (medium access control) signaling, etc.), and/or other signals and/or combinations of these.

Software should be construed broadly to mean instructions, instruction sets, code segments, program code, programs, subroutines, software modules, applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, and the like, whether referred to as "software," "firmware," "middleware," "microcode," or "hardware description language," or invoked by other terms.

Further, software, commands, information, and the like may be transmitted and received via a communication medium. For example, when software is transmitted from a website, server, or other remote source using wired (coaxial cable, fiber optic cable, twisted pair cable, digital Subscriber Line (DSL), etc.) and/or wireless technologies (infrared radiation, microwave, etc.), the wired and/or wireless technologies are included in the definition of communication medium.

The terms "system" and "network" are used interchangeably in this specification.

In this specification, the terms "Base Station (BS)", "radio base station", "eNB", "gNB", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. A base station may be referred to as a "fixed station," "NodeB," "eNodeB (eNB)", "access point," "transmission point," "reception point," "femto cell," "small cell," and so on.

A base station may house one or more (e.g., three) cells (also referred to as "sectors"). When a base station accommodates multiple cells, the entire coverage area of the base station may be divided into multiple smaller areas, and each of the smaller areas may provide communication services through a base station subsystem (e.g., an indoor small base station (RRH (remote radio head))). The term "cell" or "sector" refers to a portion or the entire coverage area of a base station and/or base station subsystem providing communication services within that coverage area.

In this specification, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)" and "terminal" are used interchangeably.

In some cases, a mobile station may be referred to by those skilled in the art as a "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," or some other suitable terminology.

Furthermore, the radio base station in the present specification may be interpreted as a user terminal. For example, each aspect/current embodiment of the present disclosure may be applied to a configuration in which communication between a radio base station and a user terminal is replaced by communication (D2D (device to device)) between a plurality of user terminals. In this case, the user terminal 20 may have the functions of the radio base station 10 described above. Also, terms such as "uplink" and "downlink" may be interpreted as "side". For example, the uplink channel may be interpreted as a side channel.

Also, the user terminal in this specification can be interpreted as a radio base station. In this case, the radio base station may have the functions of the user terminal described above.

The actions performed by the base station, which have been described in the present specification, may be performed by an upper node in some cases. In a network comprising one or more network nodes with base stations, it is clear that various operations performed to communicate with a terminal may be performed by a base station, one or more network nodes other than a base station (e.g. MME (mobility management entity), S-GW (serving gateway), etc. are possible, but these are not limiting) or a combination of these.

One or more embodiments shown in the present specification may be used alone or in combination, which may be switched according to an embodiment mode. The order of processes, sequences, flowcharts, etc. that have been used to describe aspects/current embodiments herein can be reordered as long as no inconsistencies occur. For example, while various methods have been illustrated in this specification with various components in an exemplary order of steps, the specific order illustrated herein is in no way limiting.

One or more embodiments shown in the present disclosure may be applied to LTE (long term evolution), LTE-a (LTE-advanced), LTE-B (LTE-advanced), SUPER 3G, IMT-advanced, 4G (fourth generation mobile communication system), 5G (fifth generation mobile communication system), FRA (future radio access), new-RAT (radio access technology), NR (New radio), NX (New radio access), FX (future generation radio access), GSM (registered trademark) (global system for mobile communication), CDMA 2000, UMB (ultra mobile broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (ultra wideband), bluetooth (registered trademark), systems using other suitable radio communication methods, and/or next generation systems based on these enhancements.

The phrase "based on" (or "based on … …") as used in this specification does not mean "based on" (or "based on … … only") unless otherwise indicated. In other words, the phrase "based on" means "based on" and "based on at least" ("based on" and "based on at least").

References to elements having names such as "first," "second," etc., as used herein, generally do not limit the number or order of such elements. These names may be used herein for convenience only as a method for distinguishing between two or more elements. Thus, references to a first element and a second element do not mean that only two elements may be employed, or that the first element must precede the second element in some way.

The term "determining" as used herein may encompass a wide variety of actions. For example, "determining" may be interpreted to mean making a "decision (determination)" regarding computation, operation, processing, derivation, investigation, lookup (e.g., a search table, database, or some other data structure), pinpointing, etc. Further, "judgment (determination)" may be interpreted as meaning that "judgment (determination)" is made with respect to reception (e.g., receiving information), transmission (e.g., transmitting information), input, output, access (e.g., accessing data in a memory), and the like. In addition, "judgment (determination)" as used herein may be interpreted to mean making "judgment (determination)" with respect to parsing, selecting, picking, assuming, establishing, comparing, and the like. In other words, "judgment (determination)" may be interpreted to mean "judgment (determination)" with respect to a certain action.

The terms "connected" and "coupled" or any variant of these terms, as used herein, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intervening elements between two elements "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be interpreted as "connected".

In this specification, when two elements are connected, the two elements may be considered to be "connected" or "coupled" to each other by using one or more wires, cables, and/or printed electrical connections, and by using electromagnetic energy having wavelengths in the radio frequency region, the microwave region, the (visible and invisible) optical region, and the like, as some non-limiting and non-inclusive examples.

In this specification, the phrase "a and B are different" may mean "a and B are different from each other". The terms "separate," "coupled," and the like may be similarly interpreted.

Furthermore, the term "or" as used in the present specification or claims is intended to be a non-exclusive separation.

Now, although the present invention has been described in detail above, it is obvious to those skilled in the art that the present invention is by no means limited to the embodiments described in the present specification. The present invention can be realized by various corrections and various modifications without departing from the spirit and scope of the present invention as defined by the recitation of the claims. Accordingly, the description in this specification is for the purpose of illustration only and should not be construed as limiting the invention in any way.

Alternative examples

The above examples and embodiments may be combined with each other, and various features of these examples may be combined with each other in various combinations. The invention is not limited to the specific combinations disclosed herein.

While the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (20)

1. A method of wireless communication, comprising:

receiving configuration information including frequency sounding with Sounding Reference Signal (SRS) configuration via Downlink Control Information (DCI) or higher layer signaling;

configuring a partial frequency sounding with SRS transmission based on the configuration information; and

a frequency domain starting position of the SRS for partial frequency sounding is determined.

2. The wireless communication method of claim 1, wherein the downlink control information comprises information related to an uplink system bandwidth or a downlink system bandwidth.

3. The wireless communication method of claim 1, wherein the frequency domain starting position of the SRS is determined to be the same regardless of whether frequency hopping is enabled or disabled.

4. The wireless communication method of claim 1, wherein the SRS is transmitted in consecutive Resource Blocks (RBs) across one symbol in a time domain.

5. The wireless communication method of claim 1, wherein the number of frequency partitions of the SRS depends on the number of sounding bands of the SRS.

6. The wireless communication method of claim 1, further comprising: dynamically changing a frequency domain starting position of the SRS via the DCI.

7. The wireless communication method of claim 1, further comprising: it is determined whether to disable frequency hopping by comparing a frequency hopping parameter with the number of frequency partitions of the SRS.

8. The wireless communication method of claim 1, further comprising: as part of the capability report, information corresponding to the number of probe bands supported within the bandwidth is transmitted.

9. The wireless communication method of claim 1, further comprising: a first parameter given in a physical resource element is received, the first parameter configured to identify the frequency domain starting position of the SRS.

10. The wireless communication method of claim 8, wherein the number of supported sounding bands is 2,3, 4, or 8.

11. The wireless communication method of claim 9, wherein the first parameter depends on a length of the SRS.

12. The wireless communication method of claim 9, further comprising: a second parameter is received that is configured to identify a frequency domain start position of a sounding frequency band within the SRS.

13. The wireless communication method of claim 12, wherein the first parameter is determined based on the second parameter.

14. The wireless communication method of claim 12, wherein the second parameter is specific to each SRS port.

15. The wireless communication method of claim 12, wherein the second parameter is common to all SRS ports.

16. The wireless communication method of claim 12, wherein the second parameter is configured using the DCI.

17. The wireless communication method of claim 12, wherein the second parameter is configured using RRC.

18. The wireless communication method of claim 12, wherein the second parameter corresponds to a DCI code point of an SRS request field of the DCI.

19. A terminal, comprising:

a receiver that receives configuration information via Downlink Control Information (DCI) or higher layer signaling, the configuration information including frequency sounding with a Sounding Reference Signal (SRS) configuration;

a processor configured to:

configuring a partial frequency sounding with SRS transmission based on the configuration information; and

a frequency domain starting position of the SRS for partial frequency sounding is determined.

20. A system, comprising:

a terminal, comprising:

a first receiver that receives configuration information via Downlink Control Information (DCI) or higher layer signaling, the configuration information including a frequency sounding configuration with a Sounding Reference Signal (SRS);

a processor configured to:

configuring a partial frequency sounding with SRS transmission based on the configuration information; and

determining a frequency domain starting position of the SRS for partial frequency detection; and

a base station, the base station comprising:

a transmitter that transmits the configuration information via DCI or higher layer signaling.