Multi-slot Sounding Reference Signal (SRS) resources

Abstract

Certain aspects of the present disclosure provide techniques for multi-slot sounding reference signal (SRS) resources. A method that may be performed by a user equipment (UE) includes receiving a configuration of SRS resources, wherein the SRS resources include a symbol set for transmission of the SRS across multiple slots, and transmitting the SRS to a base station using the symbol set across the multiple slots.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to U.S. Non-Provisional Application No. 17 / 447,611, filed on September 14, 2021, which claims the benefit of and priority to U.S. Provisional Application No. 63 / 078,670, filed on September 15, 2020, the entire contents of both applications are hereby expressly incorporated herein by reference, as if fully set forth below and for all applicable purposes. Technical Field

[0003]

[0004] Aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques for channel sounding. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city level, a national level, a regional level, and even a global level. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhanced set of LTE mobile standards released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on the downlink (DL) and on the uplink (UL). For this purpose, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0006] However, as the demand for mobile broadband access continues to increase, there is a need to further improve NR and LTE technologies. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. Summary of the invention

[0007] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desired attributes. Without limiting the scope of the present disclosure as expressed by the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description," those skilled in the art will understand how the features of the present disclosure provide advantages including improved techniques for detection.

[0008] Certain aspects of the subject matter described in the present disclosure may be implemented in a method for wireless communication by a user equipment (UE). The method generally includes receiving a configuration of a sounding reference signal (SRS) resource, wherein the SRS resource includes a symbol set for transmission of the SRS across multiple time slots; and sending the SRS to a base station using the symbol set across the multiple time slots.

[0009] Certain aspects of the subject matter described in the present disclosure may be implemented in a method for wireless communication. The method generally includes sending an indication of a configuration for SRS resources to a UE, wherein the SRS resources include a symbol set for transmission of SRS across multiple time slots; and receiving the SRS from the UE using the symbol set across multiple time slots.

[0010] Certain aspects of the subject matter described in the present disclosure may be implemented in an apparatus for wireless communication by a UE. The apparatus generally includes a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to receive a configuration of an SRS resource, wherein the SRS resource includes a symbol set for transmission of an SRS across multiple time slots, and to send the SRS to a base station using the symbol set across multiple time slots.

[0011] Certain aspects of the subject matter described in the present disclosure may be implemented in an apparatus for wireless communication. The apparatus generally includes a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to send an indication of a configuration for SRS resources to a UE, wherein the SRS resources include a symbol set for transmission of the SRS across multiple time slots; and receive the SRS from the UE using the symbol set across multiple time slots.

[0012] Certain aspects of the subject matter described in the present disclosure may be implemented in an apparatus for wireless communication by a UE. The apparatus generally includes means for receiving a configuration of SRS resources, wherein the SRS resources include a symbol set for transmission of the SRS across multiple time slots, and means for sending the SRS to a base station using the symbol set across multiple time slots.

[0013] Certain aspects of the subject matter described in the present disclosure may be implemented in an apparatus for wireless communication. The apparatus generally includes means for sending an indication of a configuration for SRS resources to a UE, wherein the SRS resources include a symbol set for transmission of the SRS across multiple time slots; and means for receiving the SRS from the UE using the symbol set across multiple time slots.

[0014] Certain aspects of the subject matter described in the present disclosure may be implemented in a computer-readable medium having instructions stored thereon to cause a UE to receive a configuration of SRS resources, wherein the SRS resources include a symbol set for transmission of the SRS across multiple time slots, and to send the SRS to a base station using the symbol set across multiple time slots.

[0015] Certain aspects of the subject matter described in the present disclosure may be implemented in a computer-readable medium having instructions stored thereon to cause an apparatus to send an indication of a configuration for SRS resources to a UE, wherein the SRS resources include a set of symbols for transmission of the SRS across multiple time slots; and to receive the SRS from the UE using the set of symbols across multiple time slots.

[0016] To achieve the aforementioned and related purposes, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features illustrate only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to understand in detail the manner in which the above-mentioned features of the present disclosure are achieved, a more specific description of the content briefly summarized above may be made by reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only certain typical aspects of the present disclosure, and since the description may admit of other equally effective aspects, it should not be considered as limiting the scope of protection thereof.

[0018] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0019] Figure 2 is a block diagram conceptually illustrating a design of a base station (BS) and a user equipment (UE) in accordance with certain aspects of the present disclosure.

[0020] Figure 3 is an example format for New Radio (NR) according to certain aspects of the present disclosure.

[0021] Figure 4is a flow diagram illustrating example operations for wireless communications by a BS in accordance with certain aspects of the present disclosure.

[0022] Figure 5 is a flow chart illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0023] Figure 6A-6F Various configurations of sounding reference signal (SRS) resources across time slots are shown in accordance with certain aspects of the present disclosure.

[0024] Figure 6G

[0013] Transmission of SRS using different beams is shown in accordance with certain aspects of the present disclosure.

[0025] Figure 7 and Figure 8

[0013] According to aspects of the present disclosure, a communication device is shown that may include various components configured to perform operations for the techniques disclosed herein.

[0026] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation. DETAILED DESCRIPTION

[0027] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for sounding reference signal (SRS) resource configuration. For example, SRS resources may be configured with symbols spanning multiple time slots, enhancing coverage for communication. In some implementations, the number of symbols in each time slot in the time slot used for SRS resources may be different. In some aspects, SRS resources may be configured per time slot in the case of frequency hopping, sequence-based hopping, or group-based hopping. If, for example, a time slot is subject to higher interference than another time slot, the time slot may be configured with a greater number of hoppings than the other time slot.

[0028] In some aspects, the SRS may span different numbers of time slots for different beams. For example, an SRS resource may be configured with an SRS spanning two time slots for a first beam, but it may also be configured with an SRS spanning three time slots for a second beam. The number of time slots that the SRS on a beam may span may be determined based on the coverage associated with the beam. For example, a beam with lower coverage may be configured with an SRS spanning a greater number of time slots than a beam with higher coverage, allowing a greater number of SRS repetitions for the beam with lower coverage. The various aspects described herein improve the coverage for SRS transmissions, improving the reliability and efficiency of communications.

[0029] The following description provides examples of techniques for detection in a communication system, and is not limited to the scope of protection, applicability or examples set forth in the claims. Without departing from the scope of protection of the present disclosure, the functions and arrangements of the elements discussed may be changed. Various examples may omit, replace or add various processes or components as needed. For example, the method described may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, the features described with respect to some examples may be combined in some other examples. For example, a device may be implemented or a method may be practiced using any number of aspects set forth herein. In addition, the scope of protection of the present disclosure is intended to cover such devices or methods practiced using other structures, functions, or structures and functions other than the various aspects of the disclosure set forth herein or structures, functions, or structures and functions different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims. The word "exemplary" is used herein to mean "used as an example, illustration or description". Any aspect described as "exemplary" herein is not necessarily interpreted as being more preferred or more advantageous than other aspects.

[0030] Generally, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as a radio technology, an air interface, etc. Frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.

[0031] The techniques described herein can be used for various wireless networks and radio technologies. Although various aspects may be described herein using terms commonly associated with 3G, 4G, and / or new radio (e.g., 5G NR) wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations.

[0032] NR access can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or above), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or above), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical mission targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet their respective quality of service (QoS) requirements. In addition, these services can coexist in the same subframe. NR can support beamforming, and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. The MIMO configuration in DL can support up to 8 transmit antennas with up to 8 streams and multi-layer DL transmission of up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE can be supported. Aggregation of multiple cells can be supported with up to 8 serving cells.

[0033] Figure 1 An example wireless communication network 100 is shown in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be an NR system (e.g., a 5G NR network). Figure 1 As shown in FIG, the wireless communication network 100 may communicate with a core network 132. The core network 132 may communicate with one or more base stations (BSs) 110 and / or user equipments (UEs) 120 in the wireless communication network 100 via one or more interfaces.

[0034] like Figure 1 As shown in , the wireless communication network 100 may include a number of BSs 110a-z (each also individually referred to herein as BS 110 or collectively referred to as BS 110) and other network entities. BS 110 may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be stationary or may move according to the location of mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 through various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any appropriate transport network. Figure 1In the example shown, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more cells. A network controller 130 may be coupled to a set of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110.

[0035] BS 110 communicates with UEs 120a-y (each also referred to herein individually as UE 120 or collectively as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be fixed or mobile. The wireless communication network 100 may also include relay stations (e.g., relay station 110r), also referred to as repeaters, etc., which receive transmissions of data and / or other information from upstream stations (e.g., BS 110a or UE 120r) and send transmissions of data and / or other information to downstream stations (e.g., UE 120 or BS 110), or relay transmissions between UEs 120 to facilitate communication between devices.

[0036] According to certain aspects, BS 110 and UE 120 may be configured for sounding reference signal (SRS) resource configuration. Figure 1 As shown in , BS 110a includes an SRS manager 112. According to aspects of the present disclosure, SRS manager 112 may be configured to determine a configuration of SRS resources, wherein the SRS resources include a symbol set for transmission of SRS across multiple time slots, send an indication of the configuration for the SRS resources to a UE, and receive the SRS from the UE using the symbol set across multiple time slots. Figure 1 As shown in , UE 120a includes an SRS manager 122. According to aspects of the present disclosure, the SRS manager 122 can be configured to determine (e.g., receive) a configuration of SRS resources, wherein the SRS resources include a symbol set for transmission of SRS across multiple time slots, and send the SRS to a base station using the symbol set across multiple time slots.

[0037] Figure 2 BS 110a and UE 120a are shown (e.g., Figure 1 The present invention provides example components of the wireless communication network 100 of the present invention, which can be used to implement various aspects of the present disclosure.

[0038] At BS 110a, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0039] The processor 220 can process (e.g., encode and symbol map) data and control information respectively to obtain data symbols and control symbols. The transmit processor 220 can also generate reference symbols, such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a channel state information reference signal (CSI-RS). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols (if applicable), and can provide an output symbol stream to a modulator (MOD) in a transceiver 232a-232t. Each modulator in the transceiver 232a-232t can process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from the modulators in the transceivers 232a-232t can be transmitted via antennas 234a-234t, respectively.

[0040] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator in transceivers 254a-254r may condition (e.g., filter, amplify, downconvert, and digitize) the respective received signals to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 may obtain received symbols from all demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to data sink 260, and provide decoded control information to controller / processor 280.

[0041] On the uplink, at the UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by a modulator (MOD) in the transceiver 254a-254r (e.g., for SC-FDM, etc.), and transmitted back to the BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 234, processed by modulators in transceivers 232a-232t, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120a. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240.

[0042] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0043] The antennas 252, processors 266, 258, 264, and / or controller / processor 280 of the UE 120a and / or the antennas 234, processors 220, 230, 238, and / or controller / processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2 As shown in FIG. 1 , the controller / processor 240 of BS 110a has an SRS manager 112 according to various aspects described herein. Figure 2 As shown in FIG. 1 , the controller / processor 280 of the UE 120a has an SRS manager 122 in accordance with various aspects described herein. Although shown at the controller / processor, other components of the UE 120a and the BS 110a may be used to perform the operations described herein.

[0044] NR can utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink. NR can support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones, frequency bands, etc. Each subcarrier can be modulated with data. The modulation symbol can be sent in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation (called a resource block (RB)) can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15kHz, and other SCSs can be defined with respect to the basic SCS (e.g., 30kHz, 60kHz, 120kHz, 240kHz, etc.).

[0045] Figure 3300 is a schematic diagram showing an example of a frame format for NR. The transmission timeline for each of the downlink and uplink can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10ms) and can be divided into 10 subframes, each of which is 1ms and has an index of 0 to 9. Each subframe can include a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots) depending on the SCS. Each slot can include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the SCS. The symbol period in each slot can be assigned an index. A microslot (which can be referred to as a subslot structure) refers to a transmission time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot can indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe can be dynamically switched. The link direction can be based on the slot format. Each slot can include DL / UL data and DL / UL control information.

[0046] Example Multi-Slot Sounding Reference Signal (SRS) Resource

[0047] Certain aspects of the present disclosure are generally directed to techniques for enhancing coverage by implementing a sounding reference signal (SRS) resource that spans multiple time slots. Coverage enhancement may be implemented for SRS using frequency hopping within a time slot. If hopping is enabled, some implementations have limitations on the number of symbols that can be repeated for SRS, resulting in a reduction in coverage. For example, the total number of SRS symbols may be constant, but the number of symbols per hop may be reduced. In some aspects, the number of repeated symbols per hop may be increased to maintain the same coverage per frequency hop as without hopping. For example, by implementing an SRS resource that spans multiple time slots, there may be 12 symbols per hop.

[0048] In other words, the SRS resource used for SRS transmission can span a number of symbols. The signal for SRS can be repeated in each symbol of the symbol associated with the SRS resource to improve coverage and reliability. For example, the SRS resource can have eight symbols. Therefore, the same sequence can be repeated in each of the eight symbols. For intra-frequency hopping, the UE can be configured with a number of hoppings in a time slot. For example, a resource set can be configured with eight symbols and four hoppings. Therefore, the UE can send SRS across eight symbols, where the sequence is repeated across eight symbols and has four hoppings. Therefore, each of the four hoppings can have two symbols.

[0049] Figure 4is a flow diagram illustrating example operations 400 for wireless communications in accordance with certain aspects of the present disclosure. Operations 400 may be performed, for example, by a BS, such as BS 110a in wireless communication network 100.

[0050] Operation 400 may be implemented as a process on one or more processors (e.g., Figure 2 Further, in operation 400, the transmission and reception of signals by the BS may be, for example, performed via one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the BS may be implemented via a bus interface of one or more processors (eg, controller / processor 240) that obtain and / or output signals.

[0051] Operations 400 may begin at block 405 with the BS sending an indication of a configuration for SRS resources to the UE, the SRS resources having a symbol set for transmission of SRS spanning multiple time slots. At block 415, the BS receives the SRS from the UE using the symbol set spanning multiple time slots.

[0052] Figure 5 5 is a flow diagram illustrating example operations 500 for wireless communications in accordance with certain aspects of the present disclosure. Operations 500 may be performed, for example, by a UE (e.g., UE 120a in wireless communication network 100). Operations 500 may be operations performed by a UE that are complementary to operations 400 performed by a BS.

[0053] Operation 500 may be implemented as a process on one or more processors (e.g., Figure 2 Further, in operation 500, the transmission and reception of signals by the UE may be, for example, performed via one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the UE may be implemented via a bus interface of one or more processors (eg, controller / processor 280) that obtain and / or output signals.

[0054] Operations 500 may begin at block 505 with the UE receiving a configuration of SRS resources having a symbol set for transmission of SRS across multiple time slots. For example, the UE may receive the configuration of SRS resources from a base station. At block 510, the UE may send the SRS to the base station using the symbol set across multiple time slots.

[0055] In some aspects, configuration for SRS resources may include configuration for transmission of SRS using frequency hopping across multiple time slots. In some aspects, configuration for SRS resources may include configuration for transmission of SRS using group or sequence based hopping across multiple time slots.

[0056] Figure 6A-6E Various configurations of SRS resources across time slots are shown according to certain aspects of the present disclosure. In some aspects, a symbol set for transmission of an SRS may include continuous symbols across multiple time slots. In other words, an SRS resource may be configured to span one or more time slots. An SRS resource may use continuous OFDM symbols across time slots. For example, Fig. 6A As shown in , the configured SRS resources include symbols across time slots, such as symbols 680, 682, 684 in time slot n and symbols 686, 688, 690 in time slot m. The symbol subset 602 for SRS resources in time slot n and the symbol subset 604 in time slot m are contiguous. In some aspects, the symbol subset 602 and the symbol subset 604 are on different frequency resources to achieve inter-slot frequency hopping to increase coverage.

[0057] In some aspects, a symbol set for transmission of an SRS across multiple time slots may include non-contiguous symbols. That is, the symbols of the SRS resource may not be continuous across time slots. Figure 6B As shown in , symbol subset 602 and symbol subset in 604 are non-contiguous. In this case, the same SRS resource starting OFDM symbol can be used for each time slot in the time slot. For example, symbol subset 602 can start at symbol 1 of time slot n, and symbol subset 604 can start at symbol 1 of time slot m.

[0058] In another case, different SRS resource starting OFDM symbols may be configured for each time slot in the time slot. Figure 6C As shown in , the symbol subset 602 in time slot n may start at symbol 1 of time slot n, and the symbol subset 604 in time slot m may start at symbol 2 of time slot m. In some aspects, the time slots may be consecutive or non-consecutive. In other words, time slot m and time slot n may be consecutive time slots (e.g., Figure 6C ) or non-contiguous time slots (as shown in Fig.6D ).

[0059] In some aspects, the total number of OFDM symbols per time slot may be different. Fig. 6EAs shown in , symbol subset 602 may include six symbols, while symbol subset 604 may include eight symbols. In some aspects, different numbers of SRS transmissions or different numbers of symbols per transmission, or both, may be configured. For example, Fig. 6F As shown in , there can be 4 SRS transmissions in time slot n (e.g., 2 symbols per SRS transmission for a total of 8 symbols), and there can be 2 SRS transmissions in time slot m (4 symbols per SRS transmission for a total of 8 symbols). In other words, there can be four frequency hops in time slot 2 (e.g., four symbol subsets 603, 606, 608, 610), each frequency hop in time slot n is 2 symbols, and there are two frequency hops in time slot m (e.g., symbol subsets 605, 612), each frequency hop in time slot m has 2 symbols.

[0060] In some aspects, a combination of inter-slot frequency hopping and intra-slot frequency hopping may be used for multi-slot SRS resources. In other words, the configuration of SRS resources may include multiple hoppings in a slot (e.g., Fig. 6E time slot n) and the configuration of multiple hops across time slots (e.g., Fig. 6E time slot n and time slot m).

[0061] In some aspects, group or sequence based hopping can be configured individually per time slot. For example, there can be sequence based hopping for time slot n, but no sequence based hopping for time slot m. That is, if the interference on some time slots is higher, the UE can allocate sequence based hopping for that time slot to reduce interference with neighboring UEs that may use the same sequence. Different sequences can be orthogonal. Therefore, hopping between sequences can increase the chances of neighboring UEs using orthogonal sequences when transmitting using the same resources.

[0062] In some implementations, the sequence of the SRS may be a Zadoff-Chu (ZC) sequence. Thus, ZC group-based hopping may be implemented. For example, there may be roots associated with the ZC, where the sequence for the SRS may be determined based on a cyclic shift of the root. There may be specific roots configured to generate a ZC sequence. A group generally refers to a root for a ZC sequence. Thus, group-based hopping may involve using a different root for the sequence in each SRS transmission (e.g., in each hop).

[0063] In some aspects, the number of time slots spanned by the SRS can be different for different beams (e.g., within the same TRP or across TRPs of the same or different PCIs). For example, a first number of time slots can be used for transmission of an SRS using a first beam, and a second number of time slots can be used for transmission of an SRS using a second beam, the first number of time slots being different from the second number of time slots. The first beam and the second beam can be associated with the same transmit receive point (TRP). In some aspects, the first beam and the second beam can be associated with different TRPs, the different TRPs being associated with the same physical cell identifier (PCI). In some aspects, the first beam and the second beam can be associated with different TRPs, the different TRPs being associated with different PCIs.

[0064] Figure 6G Beamforming for transmissions to TRPs is shown according to certain aspects of the present disclosure. In some aspects, the number of time slots for a beam can be determined based on the coverage associated with the beam (e.g., performed by the UE or configured by the BS). For example, the first beam can have a larger coverage than the second beam. Therefore, a larger number of repetitions for SRS can be configured for the second beam, and as a result, the SRS symbol can span a larger number of time slots. For example, as shown, beamforming can be used for transmissions to TRPs 650, 652. Beamforming generally refers to a process for controlling the directionality of the transmission and reception of radio signals. The beamforming process can help solve the high path loss associated with communications at the millimeter wave spectrum. A large number of antennas can be placed at each transceiver to utilize beamforming gain for extending the communication range. The same signal can be sent from each antenna in the array but at slightly different times to achieve beamforming.

[0065] Different beams may experience different coverage levels, such as beam 1 going to TRP 650 and beam 2 going to TRP 652. In some cases, TRPs 650, 652 may be part of the same base station. For one beam (e.g., beam 2) if the beam has a lower coverage level than another beam (e.g., beam 1), UE 120 may use a larger number of time slots, facilitating a larger number of repetitions for SRS transmission.

[0066] Figure 7 The diagram may include a method configured to perform operations for the techniques disclosed herein (such as Figure 4700 includes various components (e.g., corresponding to functional module components) of the communication device 700 and the operation shown in FIG. 700. The communication device 700 includes a processing system 702 coupled to a transceiver 708 (e.g., a transmitter and / or a receiver). The transceiver 708 is configured to send and receive signals for the communication device 700 via an antenna 710, such as various signals described herein. The processing system 702 can be configured to perform processing functions for the communication device 700, including processing signals received by the communication device 700 and / or to be transmitted.

[0067] The processing system 702 includes a processor 704 coupled to a computer-readable medium / memory 712 via a bus 706. In some aspects, the computer-readable medium / memory 712 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 704, cause the processor 704 to perform Figure 4 The operations shown or other operations for performing various techniques for detection discussed herein. In some aspects, the computer-readable medium / memory 712 stores code 714 for determining (e.g., an example of a unit for determining); and code 716 for receiving or sending (e.g., an example of a unit for receiving or sending). One or more of the codes 714, 716 can be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device. In some aspects, the computer-readable medium / memory 712 is an example of the SRS manager 112.

[0068] In some aspects, the processor 704 has circuits configured to implement the code stored in the computer-readable medium / memory 712. The processor 704 includes a circuit 720 for determining (e.g., an example of a unit for determining); and a circuit 722 for receiving or sending (e.g., an example of a unit for receiving or sending). One or more of the circuits 720, 722 can be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device. In some aspects, the processor 704 is an example of the SRS manager 112.

[0069] The transceiver 708 may provide a means for receiving information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SRS, etc.). The information may be communicated to other components of the device 700. The transceiver 708 may be a reference Figure 2Examples of various aspects of the transceiver 254 are described. Antenna 710 may correspond to a single antenna or a group of antennas. Transceiver 708 may provide a means for transmitting signals generated by other components of device 700.

[0070] Figure 8 The diagram may include a method configured to perform operations for the techniques disclosed herein (such as Figure 5 800 includes various components (e.g., corresponding to functional module components) of the communication device 800 and the operation shown in FIG. 800. The communication device 800 includes a processing system 802 coupled to a transceiver 808 (e.g., a transmitter and / or a receiver). The transceiver 808 is configured to send and receive signals for the communication device 800 via an antenna 810, such as various signals described herein. The processing system 802 can be configured to perform processing functions for the communication device 800, including processing signals received by the communication device 800 and / or to be transmitted.

[0071] The processing system 802 includes a processor 804 coupled to a computer readable medium / memory 812 via a bus 806. In some aspects, the computer readable medium / memory 812 is configured to store instructions (e.g., computer executable code) that, when executed by the processor 804, cause the processor 804 to perform Figure 5 The operations shown or other operations for performing various techniques for detection discussed herein. In some aspects, the computer-readable medium / memory 812 stores code 814 for determining (e.g., an example of a unit for determining); and code 816 for receiving or sending (e.g., an example of a unit for receiving or sending). One or more of the codes 814, 816 can be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device. In some aspects, the computer-readable medium / memory 812 is an example of the SRS manager 122.

[0072] In some aspects, the processor 804 has circuits configured to implement the code stored in the computer-readable medium / memory 812. The processor 804 includes a circuit 820 for determining (e.g., an example of a unit for determining); and a circuit 822 for receiving or sending (e.g., an example of a unit for receiving or sending). One or more of the circuits 820, 822 can be performed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device. In some aspects, the processor 804 is an example of the SRS manager 122.

[0073] The transceiver 808 may provide a means for receiving information such as packets associated with various information channels (e.g., control channels, data channels, and information related to SRS, etc.), user data, or control information. The information may be communicated to other components of the device 800. The transceiver 808 may be a reference Figure 2 Examples of various aspects of the transceiver 254 are described. Antenna 810 may correspond to a single antenna or a group of antennas. Transceiver 808 may provide a means for transmitting signals generated by other components of device 800.

[0074] Sample Clauses

[0075] Examples of implementations are described in the following numbered clauses:

[0076] Clause 1: A method for wireless communication performed by a user equipment (UE), comprising: receiving a configuration of a sounding reference signal (SRS) resource, wherein the SRS resource includes a symbol set for transmission of the SRS across multiple time slots; and sending the SRS to a base station using the symbol set across multiple time slots.

[0077] Clause 2. The method of claim 1, wherein the configuration for the SRS resources comprises configuration for transmission of the SRS using frequency hopping across a plurality of time slots.

[0078] Clause 3. The method of claim 1, wherein the configuration for SRS resources comprises configuration for transmission of the SRS using group or sequence based hopping across a plurality of time slots.

[0079] Clause 4. The method of claim 1, wherein the configuration of the SRS resources is received from a base station.

[0080] Clause 5. The method of claim 1, wherein a symbol set used for transmission of the SRS comprises consecutive symbols spanning a plurality of time slots.

[0081] Clause 6. The method of claim 1, wherein a set of symbols used for transmission of the SRS across a plurality of time slots comprises non-contiguous symbols.

[0082] Clause 7. A method according to claim 1, wherein the symbol set includes: a first subset of symbols in a first time slot among a plurality of time slots; and a second subset of symbols in a second time slot among the plurality of time slots, wherein a starting symbol of the first subset of symbols in the first time slot is the same as a starting symbol of the second subset of symbols in the second time slot.

[0083] Clause 8. A method according to claim 1, wherein the symbol set includes: a first subset of symbols in a first time slot among a plurality of time slots; and a second subset of symbols in a second time slot among the plurality of time slots, wherein a starting symbol of the first subset of symbols in the first time slot is different from a starting symbol of the second subset of symbols in the second time slot.

[0084] Clause 9. The method of claim 1, wherein the plurality of time slots comprises non-contiguous time slots.

[0085] Clause 10. The method of claim 1, wherein the plurality of time slots comprises consecutive time slots.

[0086] Clause 11. A method according to claim 1, wherein the symbol set includes: a first subset of symbols in a first time slot among a plurality of time slots; and a second subset of symbols in a second time slot among the plurality of time slots, the number of symbols in the first subset in the first time slot being different from the number of symbols in the second subset in the second time slot.

[0087] Clause 12. A method according to claim 1, wherein the configuration of the SRS resources includes: configuration of transmission of the SRS using a first number of one or more first hops in a first time slot among a plurality of time slots; and configuration of transmission of the SRS using a second number of one or more second hops in a second time slot among the plurality of time slots, the first number of one or more first hops and the second number of one or more second hops being different.

[0088] Clause 13. The method of claim 1, wherein the configuration of the SRS resources comprises configuration for a plurality of hops in a slot among a plurality of slots and a plurality of hops across a plurality of slots.

[0089] Clause 14. The method of claim 1, wherein the configuration of the SRS resources comprises configuration of group or sequence based hopping for transmission of the SRS for at least one of the plurality of time slots.

[0090] Clause 15. The method of claim 1, further comprising: determining a first number of time slots for transmission of the SRS using the first beam; and determining a second number of time slots for transmission of the SRS using the second beam, the first number of time slots being different from the second number of time slots.

[0091] Clause 16. The method of claim 15, wherein the first beam and the second beam are associated with a same transmit receive point (TRP).

[0092] Clause 17. The method of claim 15, wherein the first beam and the second beam are associated with different TRPs, the different TRPs being associated with the same physical cell identifier (PCI).

[0093] Clause 18. The method of claim 15, wherein the first beam and the second beam are associated with different TRPs, the different TRPs being associated with different PCIs.

[0094] Clause 19. A method for wireless communication, comprising: sending an indication of a configuration for a sounding reference signal (SRS) resource to a user equipment (UE), wherein the SRS resource comprises a set of symbols for transmission of the SRS across a plurality of time slots; and receiving the SRS from the UE using the set of symbols across the plurality of time slots.

[0095] Clause 20. The method of claim 19, wherein the configuration for the SRS resources comprises configuration for transmission of the SRS using frequency hopping across a plurality of time slots.

[0096] Clause 21. The method of claim 19, wherein the configuration for SRS resources comprises configuration for transmission of the SRS using group or sequence based hopping across a plurality of time slots.

[0097] Clause 22. The method of claim 19, wherein the set of symbols used for transmission of the SRS comprises consecutive symbols spanning a plurality of time slots.

[0098] Clause 23. The method of claim 19, wherein the set of symbols used for transmission of the SRS across a plurality of time slots comprises non-contiguous symbols.

[0099] Clause 24. A method according to claim 19, wherein the symbol set includes: a first subset of symbols in a first time slot among the plurality of time slots; a second subset of symbols in a second time slot among the plurality of time slots, and a starting symbol of the first subset of symbols in the first time slot is the same as a starting symbol of the second subset of symbols in the second time slot.

[0100] Clause 25. A method according to claim 19, wherein the symbol set includes: a first subset of symbols in a first time slot among the plurality of time slots; and a second subset of symbols in a second time slot among the plurality of time slots, wherein a starting symbol of the first subset of symbols in the first time slot is different from a starting symbol of the second subset of symbols in the second time slot.

[0101] Clause 26. The method of claim 19, wherein the plurality of time slots comprises non-contiguous time slots.

[0102] Clause 27. The method of claim 19, wherein the plurality of time slots comprises consecutive time slots.

[0103] Clause 28. A method according to claim 19, wherein the symbol set includes: a first subset of symbols in a first time slot among the plurality of time slots; and a second subset of symbols in a second time slot among the plurality of time slots, the number of symbols in the first subset in the first time slot being different from the number of symbols in the second subset in the second time slot.

[0104] Clause 29. A method according to claim 19, wherein the configuration of the SRS resources includes: configuration of transmission of the SRS using a first number of one or more first hops in a first time slot among a plurality of time slots; and configuration of transmission of the SRS using a second number of one or more second hops in a second time slot among the plurality of time slots, the first number of one or more first hops and the second number of one or more second hops being different.

[0105] Clause 30. The method of claim 19, wherein the configuration of the SRS resources comprises configuration for a plurality of hops in a slot among the plurality of slots and a plurality of hops across the plurality of slots.

[0106] Clause 31. The method of claim 19, wherein the configuration of the SRS resources comprises configuration for group or sequence based hopping for transmission of the SRS for at least one of the plurality of time slots.

[0107] Clause 32. The method of claim 19, wherein a first number of time slots for transmission of the SRS using the first beam is different from a second number of time slots for transmission of the SRS using the second beam.

[0108] Clause 33. The method of claim 32, wherein the first beam and the second beam are associated with a same transmit receive point (TRP).

[0109] Clause 34. The method of claim 32, wherein the first beam and the second beam are associated with different TRPs, the different TRPs being associated with the same physical cell identifier (PCI).

[0110] Clause 35. The method of claim 32, wherein the first beam and the second beam are associated with different TRPs, and the different TRPs are associated with different PCIs.

[0111] Clause 36: An apparatus comprising: a memory including executable instructions; one or more processors configured to execute the executable instructions and cause the apparatus to perform a method according to any one of clauses 1 to 35.

[0112] Clause 37: An apparatus comprising means for performing the method according to any one of clauses 1 to 35.

[0113] Clause 38: A non-transitory computer readable medium comprising executable instructions which, when executed by one or more processors of an apparatus, cause the apparatus to perform a method according to any one of clauses 1 to 35.

[0114] Clause 39: A computer program product embodied on a computer readable storage medium, the computer readable storage medium comprising code for performing the method according to any one of clauses 1 to 35.

[0115] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified with the frequency range names FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0116] In view of the above, unless otherwise expressly stated, it should be understood that the term "sub-6 GHz" and the like (if used herein) can broadly refer to frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Further, unless otherwise expressly stated, it should be understood that the term "millimeter wave" and the like (if used herein) can broadly refer to frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0117] The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network may implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0118] In 3GPP, the term "cell" may refer to the coverage area of ​​a Node B (NB) and / or a NB subsystem serving this coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and BS, next generation Node B (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmit receive point (TRP) may be used interchangeably. The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a residence, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be called a femto BS or a home BS.

[0119] UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a customer premises equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a home appliance, a medical device or medical equipment, a biosensor / device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music device, a video device, a satellite radio unit, etc.), a component or sensor of a vehicle, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium. Some UEs may be considered as machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node may provide, for example, a connection to a network or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0120] In some examples, access to the air interface can be scheduled. The scheduling entity (e.g., BS) allocates resources for communication among some or all devices and equipment in its service area or cell. The scheduling entity can be responsible for scheduling, assigning, reconfiguring and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entity utilizes the resources allocated by the scheduling entity. The base station is not the only entity that can act as a scheduling entity. In some examples, the UE can act as a scheduling entity, and resources for one or more subordinate entities (e.g., one or more other UEs) can be scheduled, and other UEs can utilize resources scheduled by the UE for wireless communication. In some examples, the UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In the mesh network example, the UE can communicate directly with each other in addition to communicating with the scheduling entity.

[0121] The method disclosed herein includes one or more steps or actions for implementing the method. The method steps and / or actions may be interchangeable without departing from the scope of protection of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of protection of the claims.

[0122] As used herein, a phrase referring to “at least one of” a list item refers to any combination of those items, including single members. As an example, “at least one of a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiples of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc or any other ordering of a, b, and c).

[0123] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, etc. In addition, "determine" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. In addition, "determine" may include resolving, selecting, choosing, establishing, etc.

[0124] The previous description is provided so that any technician in the field can practice the various aspects described herein. It will be obvious to those skilled in the art that various modifications to these aspects will be apparent, and the overall principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the various aspects shown herein, but to conform to the full scope consistent with the language of the claims, wherein unless explicitly stated, references to elements in the singular are not intended to mean "one and only one", but "one or more". Unless otherwise explicitly stated, the term "some" refers to one or more. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure, which are known or will be known to those of ordinary skill in the art, are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, there is no disclosure herein that is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recorded in the claims. No claim element is to be interpreted according to 35 U.S.C. § 112 (f), unless the element is explicitly recorded using the phrase "unit for...", or in the case of a method claim, the element is recorded using the phrase "step for...".

[0125] The various operations of the methods described above may be performed by any suitable unit capable of performing the corresponding functions. The unit may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. Generally, where operations are shown in the accompanying drawings, those operations may have corresponding paired functional module components with similar numbers.

[0126] The various illustrative logic blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or performed using a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration.

[0127] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application of the processing system and the overall design constraints, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter and other items to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In a user terminal (see Figure 1 ), a user interface (e.g., keyboard, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and therefore will not be described any further. The processor may be implemented using one or more general purpose processors and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits that can execute software. Those skilled in the art will recognize how to best implement the described functionality for the processing system depending on the specific application and the overall design constraints imposed on the entire system.

[0128] If implemented in software, the function may be stored on a computer-readable medium or sent as one or more instructions or codes on a computer-readable medium. Software should be broadly interpreted as meaning instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include computer storage media and communication media, and communication media include any media that facilitates the transmission of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including the execution of software stored on a machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. In an alternative solution, the storage medium may be a component of the processor. For example, the machine-readable medium may include a transmission line, a carrier waveform modulated by data, and / or a computer-readable storage medium having instructions stored thereon separated from a wireless node, all of which may be accessed by the processor through a bus interface. Alternatively or additionally, the machine-readable medium or any part thereof may be integrated into the processor, such as the case may be with a cache and / or a general register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard disks, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0129] A software module may include a single instruction or multiple instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media. A computer-readable medium may include a number of software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may exist in a single storage device, or may be distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard disk into a RAM. During execution of the software module, the processor may load some of the instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When the following relates to the functions of a software module, it will be understood that such functions are implemented by the processor when executing instructions from the software module.

[0130] In addition, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Optical disks, where magnetic disks typically reproduce data magnetically, and optical disks use lasers to reproduce data optically. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of protection of computer-readable media.

[0131] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein, for example, for performing the operations described herein and in Figure 4 and Figure 5 Instructions for the operations shown in .

[0132] Further, it should be understood that the modules and / or other appropriate units for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station on demand. For example, such a device can be coupled to a server to facilitate the transmission of the unit for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage unit (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.), so that the user terminal and / or base station can obtain the various methods when the storage unit is coupled to or provided to the device. In addition, any other appropriate technology for providing the methods and techniques described herein to the device can be utilized.

[0133] It is to be understood that the claims are not limited to the precise configuration and components shown above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. An apparatus for wireless communication by a user equipment (UE), comprising: Memory; as well as one or more processors coupled to the memory, the memory and the one or more processors individually or collectively configured to: receiving a configuration of a sounding reference signal (SRS) resource, wherein the SRS resource comprises a set of symbols for transmission of the SRS across a plurality of time slots; Determining, by the UE, a first number of time slots among the plurality of time slots for transmission of the SRS using a first beam; determining, by the UE, a second number of time slots among the plurality of time slots for transmission of the SRS using a second beam, the first number of time slots being different from the second number of time slots; and The SRS is transmitted to a base station using the symbol set spanning the plurality of time slots, wherein the symbol set used for transmission of the SRS includes consecutive symbols spanning the plurality of time slots.

2. The device according to claim 1, wherein: The configuration for the SRS resources includes configuration for the transmission of the SRS using frequency hopping across the plurality of time slots.

3. The device according to claim 1, wherein: The configuration for the SRS resources includes configuration for transmission of the SRS using group or sequence based hopping across the plurality of time slots.

4. The device according to claim 1, wherein: The configuration of the SRS resources is received from the base station.

5. The device according to claim 1, wherein: The symbol set includes: a first subset of symbols in a first time slot of the plurality of time slots; and A second subset of symbols in a second slot of the plurality of slots, a starting symbol of the first subset of symbols in the first slot being the same as a starting symbol of the second subset of symbols in the second slot.

6. The device according to claim 1, wherein: The symbol set includes: a first subset of symbols in a first time slot of the plurality of time slots; and For a second subset of symbols in a second slot of the plurality of slots, a starting symbol of the first subset of symbols in the first slot is different from a starting symbol of the second subset of symbols in the second slot.

7. The device according to claim 1, wherein: The plurality of time slots comprises consecutive time slots.

8. The device according to claim 1, wherein: The symbol set includes: a first subset of symbols in a first time slot of the plurality of time slots; and A second subset of symbols in a second time slot of the plurality of time slots, a number of symbols in the first subset in the first time slot being different from a number of symbols in the second subset in the second time slot.

9. The device according to claim 1, wherein: The configuration of the SRS resources includes: a configuration for transmission of the SRS using a first number of one or more first hops in a first time slot in the plurality of time slots; and For configuring transmission of the SRS using a second number of one or more second hops in a second time slot of the plurality of time slots, the first number of the one or more first hops and the second number of the one or more second hops are different.

10. The device according to claim 1, wherein: The configuration of the SRS resources includes configuration for a plurality of hops in a time slot among the plurality of time slots and a plurality of hops across the plurality of time slots.

11. The device according to claim 1, wherein: The configuration of the SRS resources includes configuration for group or sequence based hopping for transmission of the SRS for at least one time slot of the plurality of time slots.

12. The device according to claim 1, wherein: The first beam and the second beam are associated with a same transmit receive point (TRP).

13. The device according to claim 1, wherein: The first beam and the second beam are associated with different TRPs, and the different TRPs are associated with the same physical cell identifier (PCI).

14. The device according to claim 1, wherein: The first beam and the second beam are associated with different TRPs, and the different TRPs are associated with different PCIs.

15. An apparatus for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the memory and the one or more processors individually or collectively configured to: Sending an indication of a configuration for a sounding reference signal (SRS) resource to a user equipment (UE), wherein the SRS resource comprises a set of symbols for transmission of the SRS across a plurality of time slots; and The SRS is received from the UE using the symbol set spanning the multiple time slots, wherein the symbol set used for transmission of the SRS includes consecutive symbols spanning the multiple time slots, and wherein a first number of time slots in the multiple time slots for transmission of the SRS using a first beam is different from a second number of time slots in the multiple time slots for transmission of the SRS using a second beam.

16. The device according to claim 15, wherein: The configuration for the SRS resources includes configuration for the transmission of the SRS using frequency hopping across the plurality of time slots.

17. The device according to claim 15, wherein: The configuration for the SRS resources includes configuration for transmission of the SRS using group or sequence based hopping across the plurality of time slots.

18. The device according to claim 17, wherein: The symbol set includes: a first subset of symbols in a first time slot of the plurality of time slots; and A second subset of symbols in a second slot of the plurality of slots, a starting symbol of the first subset of symbols in the first slot being the same as a starting symbol of the second subset of symbols in the second slot.

19. The device according to claim 15, wherein: The symbol set includes: a first subset of symbols in a first time slot of the plurality of time slots; and For a second subset of symbols in a second slot of the plurality of slots, a starting symbol of the first subset of symbols in the first slot is different from a starting symbol of the second subset of symbols in the second slot.

20. The device according to claim 17, wherein: The plurality of time slots comprises consecutive time slots.

21. The device according to claim 15, wherein: The symbol set includes: a first subset of symbols in a first time slot of the plurality of time slots; and A second subset of symbols in a second time slot of the plurality of time slots, a number of symbols in the first subset in the first time slot being different from a number of symbols in the second subset in the second time slot.

22. The device according to claim 15, wherein: The configuration of the SRS resources includes: a configuration for transmission of the SRS using a first number of one or more first hops in a first time slot in the plurality of time slots; and For configuring transmission of the SRS using a second number of one or more second hops in a second time slot of the plurality of time slots, the first number of the one or more first hops and the second number of the one or more second hops are different.

23. The device according to claim 15, wherein: The configuration of the SRS resources includes configuration for a plurality of hops in a time slot among the plurality of time slots and a plurality of hops across the plurality of time slots.

24. The device according to claim 15, wherein: The configuration of the SRS resources includes configuration for group or sequence based hopping for transmission of the SRS for at least one time slot of the plurality of time slots.

25. A method for wireless communication by a user equipment (UE), comprising: receiving a configuration of a sounding reference signal (SRS) resource, wherein the SRS resource comprises a set of symbols for transmission of the SRS across a plurality of time slots; Determining, by the UE, a first number of time slots among the plurality of time slots for transmission of the SRS using a first beam; determining, by the UE, a second number of time slots among the plurality of time slots for transmission of the SRS using a second beam, the first number of time slots being different from the second number of time slots; and The SRS is transmitted to a base station using the symbol set spanning the plurality of time slots, wherein the symbol set used for transmission of the SRS includes consecutive symbols spanning the plurality of time slots.

26. A method for wireless communication, comprising: Sending an indication of a configuration for a sounding reference signal (SRS) resource to a user equipment (UE), wherein the SRS resource comprises a set of symbols for transmission of the SRS across a plurality of time slots; and The SRS is received from the UE using the symbol set spanning the multiple time slots, wherein the symbol set used for transmission of the SRS includes consecutive symbols spanning the multiple time slots, and wherein a first number of time slots in the multiple time slots for transmission of the SRS using a first beam is different from a second number of time slots in the multiple time slots for transmission of the SRS using a second beam.

Images