Apparatus, method, medium, and computer program product for wireless communication

Abstract

Certain aspects of the present disclosure provide techniques for configuring sounding reference signal (SRS) resources for RRC inactive or idle UEs and multiplexing SRS with small data transmission on preconfigured uplink resources (PUR). An example method by a user equipment (UE) generally includes receiving signaling configuring the UE with SRS resources for SRS transmission, QCL relationships, power control, and timing advance information, and transmitting SRS in conjunction with one or more of PUR occasions according to the configuration and signaling.

Description

[0001] Cross-references to related applications

[0002] This application claims the rights and priority of Greek Provisional Application No. 20200100624, filed on 16 October 2020, which is hereby assigned to the assignee of this application and whose entire contents are expressly incorporated herein by reference, as if fully set forth below and used for all applicable purposes. Technical Field

[0003] Various aspects of this disclosure relate to wireless communications, and more specifically, to techniques for multiplexing pre-configured uplink resources (PUR) and sounding reference signals (SRS). Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. These wireless communication systems can employ multiple access technologies that enable communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include 3GPP Long Term Evolution (LTE) systems, Advanced LTE (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 by various telecommunications standards to provide a universal protocol that enables different wireless devices to communicate at the city, country, region, and even global levels. New radios (such as 5G NR) are examples of emerging telecommunications standards. NR is a set of enhancements to the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband internet access by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefixes (CP) on both the downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0006] However, with the continued increase in demand for mobile broadband access, further improvements to NR and LTE technologies are needed. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that employ these technologies. Summary of the Invention

[0007] The systems, methods, and apparatuses of this disclosure have several aspects, none of which is solely responsible for their desired properties. Without limiting the scope of this disclosure as expressed in the appended claims, some features will now be briefly discussed. After considering this discussion, and especially after reading the section entitled "Detailed Description," one will understand how the features of this disclosure can provide advantages, such as improved energy efficiency.

[0008] Some aspects provide a method for wireless communication by a user equipment (UE). The method generally includes receiving signaling for configuring resources for pre-configured uplink resource (PUR) timing and resources for sounding reference signal (SRS) transmission for the UE, and transmitting the SRS in combination with one or more of the PUR timings according to the configuration.

[0009] Some aspects provide a method for wireless communication by a network entity. This method generally includes transmitting UE signaling to configure resources for PUR timings and resources for SRS transmission for a UE, and monitoring SRS in conjunction with one or more of the PUR timings according to the configuration.

[0010] Certain aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication performed by a UE. The apparatus generally includes at least one processor and a memory coupled to the at least one processor, the memory including instructions executable by the at least one processor to cause the UE to: receive signaling configuring resources for pre-configured uplink resource (PUR) timings and resources for probe reference signal (SRS) transmission for the UE; and transmit SRS in combination with one or more of the PUR timings according to the configuration.

[0011] Certain aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication by a network entity. The apparatus generally includes at least one processor and a memory coupled to the at least one processor, the memory including instructions executable by the at least one processor to cause the network entity to: transmit UE signaling configuring resources for PUR timings and resources for SRS transmissions for a UE; and monitor SRS in conjunction with one or more PUR timings according to the configuration.

[0012] Certain aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication performed by a UE. The UE generally includes components for receiving signaling that configures resources for pre-configured uplink resource (PUR) timings and resources for sounding reference signal (SRS) transmission for the UE, and components for transmitting SRS in combination with one or more of the PUR timings according to the configuration.

[0013] Certain aspects of the subject matter described in this disclosure can be implemented in an apparatus for wireless communication performed by a network entity. This network entity generally includes components for transmitting UE signaling to configure resources for PUR timings and resources for SRS transmission for a UE, and components for monitoring SRS in conjunction with one or more PUR timings according to the configuration.

[0014] Certain aspects of the subject matter described in this disclosure may be implemented in a computer-readable medium having computer-executable code stored thereon for wireless communication by a UE. The computer-readable medium generally includes code for receiving signaling for configuring resources for pre-configured uplink resource (PUR) timings and resources for sounding reference signal (SRS) transmission for the UE, and code for transmitting SRS in combination with one or more of the PUR timings according to the configuration.

[0015] Certain aspects of the subject matter described in this disclosure can be implemented in a computer-readable medium having computer-executable code stored thereon for wireless communication by a network entity. This computer-readable medium generally includes code for transmitting UE signaling for configuring resources for PUR timings and resources for SRS transmission for a UE, and code for monitoring SRS in conjunction with one or more PUR timings according to the configuration.

[0016] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth certain illustrative features of one or more aspects in detail. However, these features indicate only some of the various ways in which the principles of these aspects may be employed. Attached Figure Description

[0017] To gain a more detailed understanding of the foregoing features of this disclosure, a more specific description of the above-brief summary can be obtained by referring to some of the aspects illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered as limiting its scope, as the description may allow for other equally valid aspects.

[0018] Figure 1 This is a conceptual block diagram illustrating an example telecommunications system based on certain aspects of this disclosure.

[0019] Figure 2 This is a block diagram illustrating an example architecture of a distributed radio access network (RAN) according to certain aspects of this disclosure.

[0020] Figure 3 This is a block diagram illustrating an example of a communication protocol stack for implementing an example RAN architecture, based on certain aspects of this disclosure.

[0021] Figure 4 This is a block diagram conceptually illustrating the design of an example base station (BS) and user equipment (UE) according to certain aspects of this disclosure.

[0022] Figure 5 An example system architecture for interoperability between 5G systems (5GS) and Evolved Universal Mobile Telecommunications System Network (E-UTRAN) systems is shown, based on certain aspects of this disclosure.

[0023] Figure 6 An example of a frame format for a telecommunications system is shown, based on certain aspects of this disclosure.

[0024] Figure 7 This is a timing diagram illustrating an example four-step RACH process according to certain aspects of this disclosure.

[0025] Figure 8 This is a timing diagram illustrating an example two-step RACH process according to certain aspects of this disclosure.

[0026] Figure 9 This is a diagram illustrating example functionality of a Reduced Capability (RedCap) user equipment (UE) according to certain aspects of this disclosure.

[0027] Figure 10 This is a diagram illustrating beam associations for pre-configured uplink resource (PUR) groups according to certain aspects of this disclosure.

[0028] Figure 11 This is a flowchart illustrating example operations of a UE performing wireless communication in accordance with certain aspects of this disclosure.

[0029] Figure 12 This is a flowchart illustrating example operations of wireless communication by a network entity in accordance with certain aspects of this disclosure.

[0030] Figure 13 This is an example of multiplexing a probe reference signal (SRS) with a PUR timing in accordance with certain aspects of this disclosure.

[0031] Figures 14A to 14C Different mechanisms for reusing SRS and PUR timings are illustrated according to certain aspects of this disclosure.

[0032] Figure 15 The present disclosure illustrates a communication device that may include various components configured to perform operations using the techniques disclosed herein.

[0033] Figure 16The present disclosure illustrates a communication device that may include various components configured to perform operations using the techniques disclosed herein.

[0034] To facilitate understanding, the same reference numerals have been used wherever possible to refer to the same elements common to the accompanying drawings. It is anticipated that elements disclosed in one aspect may be advantageously used in other aspects without specific description. Detailed Implementation

[0035] Various aspects of this disclosure relate to wireless communications, and more specifically, to techniques for multiplexing pre-configured uplink resources (PUR) and sounding reference signals (SRS). For example, SRS transmission can help the UE support small data delivery (SDT) in connectionless modes (e.g., idle or inactive).

[0036] One goal of wireless communication networks, such as New Radio (NR) networks, is to enable them to scale and deploy efficiently and cost-effectively. To promote scalability, a new type of UE with reduced capabilities (RedCap) has been introduced. RedCap UEs can exhibit generally loose peak throughput and lower latency requirements. This can include scalable resource allocation, coverage enhancement, and power savings.

[0037] To facilitate enhanced scalability of RedCap UEs, aspects of this disclosure provide techniques for multiplexing pre-configured uplink resources (PUR) with sounding reference signals (SRS). The PUR mechanism can allocate radio resources to the UE for transmission without connection establishment, thereby reducing latency. PUR can also enhance SRS-assisted tracking, channel sounding / localization, and / or beam association.

[0038] SRS can increase the reliability of Small Data Delivery (SDT) for UEs in connectionless mode, which in turn can help UEs meet NR RedCap reliability requirements. This can enhance UE performance by allowing base stations to track changes in uplink timing offsets and / or perform link adaptation.

[0039] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this disclosure. Various processes or components may be omitted, substituted, or added as needed in various examples. For example, a described method may be performed in a different order than that described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Additionally, the scope of this disclosure is intended to cover such apparatuses and methods practiced using structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred over or superior to other aspects.

[0040] The technologies described in this document can be used in various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other networks. The terms "network" and "system" are often used interchangeably. CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA) and cdma2000. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers the IS-2000, IS-95, and IS-856 standards. TDMA networks can implement radio technologies such as the Global System for Mobile Communications (GSM). OFDMA networks can 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, and others. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS).

[0041] New Radio (NR) is an emerging wireless communication technology jointly developed with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). The technologies described herein can be used with the wireless networks and radio technologies mentioned above, as well as other wireless networks and radio technologies. For clarity, although terms commonly associated with 3G and / or 4G wireless technologies may be used to describe aspects herein, aspects of this disclosure can be applied to other generation-based communication systems such as 5G and later, including NR technology.

[0042] New radio (NR) access (e.g., 5G technology) can support a variety of wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 25 GHz or above), massive machine-type communication (mMTC) targeting non-backward compatible MTC technologies, and / or mission-critical communication targeting ultra-reliable low-latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTI) to meet corresponding quality of service (QoS) requirements. Furthermore, these services can coexist in the same subframe.

[0043] Example wireless communication system

[0044] Figure 1 An example wireless communication network 100 in which aspects of this disclosure can be performed is shown. For example, UE 120 can be configured to perform... Figure 11 Operation 1100 multiplexes pre-configured uplink resource (PUR) timings with sounding reference signals (SRS) according to the various aspects discussed herein. Similarly, base station 110 can be configured to perform... Figure 12 Operation 1200 is used to configure and monitor the SRS multiplexed with PUR timing from the UE (e.g., to perform...). Figure 12 Operation 1200).

[0045] like Figure 1As shown, the wireless communication network 100 may include a plurality of base stations (BSs) 110 and other network entities. A BS may be a station communicating with a user equipment (UE). Each BS 110 may provide communication coverage for a specific geographic area. In 3GPP, depending on the context in which the term is used, the term “cell” may refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area. In NR systems, the term “cell” and Next Generation Node B (gNB or gNodeB), NR BS, 5G NB, Access Point (AP), or Transmit / Receive Point (TRP) may be interchangeable. In some examples, a cell may not necessarily be fixed, and the geographic area of ​​a cell may move depending on the location of a mobile BS. In some examples, base stations may interconnect with each other and / or interconnect to one or more other base stations or network nodes (not shown) in the wireless communication network 100 via various types of backhaul interfaces, such as direct physical connections, wireless connections, virtual networks, or analogues using any suitable transport network.

[0046] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific Radio Access Technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0047] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other cell types. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access for UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access for UEs associated with the femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs of users in a home, etc.). A BS used for macrocells can be called a macro BS. A BS used for picocells can be called a pico BS. A BS used for femtocells can be called a femto BS or a home BS. Figure 1 In the example shown, BS 110a, 110b, and 110c can be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x can be a pico BS for pico cell 102x. BS 110y and 110z can be femto BSs for femto cells 102y and 102z, respectively. A BS can support one or more (e.g., three) cells.

[0048] The wireless communication network 100 may also include relay stations. A relay station is a station that receives data and / or other information transmissions from an upstream station (e.g., a BS or a UE) and sends data and / or other information transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that relays transmissions intended for other UEs. Figure 1 In the example shown, relay station 110r can communicate with BS 110a and UE 120r to facilitate communication between BS 110a and UE 120r. A relay station can also be referred to as a relay BS, repeater, etc.

[0049] The wireless communication network 100 can be a heterogeneous network comprising different types of base stations (BSs) (e.g., macro BSs, pico BSs, femto BSs, repeaters, etc.). These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in the wireless communication network 100. For example, a macro BS can have a high transmit power level (e.g., 20 watts), while a pico BS, femto BS, and repeaters can have a lower transmit power level (e.g., 1 watt).

[0050] The wireless communication network 100 can support synchronous or asynchronous operation. For synchronous operation, the base stations (BSs) can have similar frame timings, and transmissions from different BSs can be approximately time-aligned. For asynchronous operation, the BSs can have different frame timings, and transmissions from different BSs can be time-disaligned. The techniques described herein can be used for both synchronous and asynchronous operations.

[0051] Network controller 130 can be coupled to a group of BSs and provide coordination and control for these BSs. Network controller 130 can communicate with BS 110 via backhaul. BS 110 can also communicate with each other (e.g., directly or indirectly) via wireless or wired backhaul.

[0052] UE 120 (e.g., 120x, 120y, etc.) may be distributed throughout the wireless communication network 100, and each UE may be fixed or mobile. A UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable devices such as smartwatches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart rings, smart bracelets, etc.), entertainment devices (e.g., music devices, video devices, satellite radios, etc.), vehicle components or sensors, smart meters / sensors, industrial manufacturing equipment, GPS devices, or any other suitable device configured to communicate via wireless or wired media. Some UEs may be considered machine-type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include devices capable of communicating with a BS, another device (e.g., a remote device), or other entities such as robots, drones, remote devices, sensors, meters, monitors, location tags, etc. Wireless nodes can provide connectivity, for example, via wired or wireless communication links to or from a network (e.g., a wide area network such as the Internet or cellular networks). Some UEs can be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0053] Some wireless networks (e.g., LTE) utilize Orthogonal Frequency Division Multiplexing (OFDM) on the downlink and Single-Carrier Frequency Division Multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, frequency bands, etc. Each subcarrier can be modulated using data. Generally, modulation symbols are transmitted using OFDM in the frequency domain and SC-FDM in the time domain. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the subcarrier spacing can be 15 kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180 kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, the nominal Fast Fourier Transform (FFT) step size can be equal to 128, 256, 512, 1024, or 2048, respectively. System bandwidth can also be divided into subbands. For example, a subband can cover 1.08 MHz (i.e., 6 resource blocks), and for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, there can be 1, 2, 4, 8, or 16 subbands respectively.

[0054] While the aspects of the examples described herein may be associated with LTE technology, aspects of this disclosure can be applied to other wireless communication systems, such as NR. NR can use OFDM with CP on both the uplink and downlink, and includes support for half-duplex operation using TDD. Beamforming can be supported, and beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support eight transmit antennas for multilayer DL transmission with up to eight streams and up to two streams per UE. Multilayer transmission with up to two streams per UE can be supported. Aggregation of multiple cells with up to eight serving cells can be supported.

[0055] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication between some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, the subordinate entity utilizes the resources allocated by the scheduling entity. A base station is not the only entity that can act as a scheduling entity. In some examples, a UE can act as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can utilize the resources scheduled by that UE for wireless communication. In some examples, a UE can act as a scheduling entity in peer-to-peer (P2P) networks and / or mesh networks. In mesh network examples, in addition to communicating with a scheduling entity, UEs can also communicate directly with each other.

[0056] exist Figure 1 In the diagram, a solid line with a double arrow indicates a desired transmission between the UE and the serving BS, which is the BS designated to serve the UE on the downlink and / or uplink. A thin dashed line with a double arrow indicates interference transmission between the UE and the BS.

[0057] Figure 2 It shows that it can be used Figure 1 An example architecture of a distributed radio access network (RAN) 200 implemented in the wireless communication network 100 shown. Figure 2 As shown, the distributed RAN includes a core network (CN) 202 and an access node 208.

[0058] CN 202 can be responsible for core network functions. CN 202 can be centrally deployed. CN 202 functions can be offloaded (e.g., to Advanced Wireless Services (AWS)) to handle peak capacity. CN 202 may include Access and Mobility Management Function (AMF) 204 and User Plane Function (UPF) 206. AMF 204 and UPF 206 can perform one or more core network functions.

[0059] AN 208 can communicate with CN 202 (e.g., via a backhaul interface). AN 208 can communicate with AMF 204 via an N2 (e.g., NG-C) interface. AN 208 can communicate with UPF 208 via an N3 (e.g., NG-U) interface. AN 208 may include a Central Unit Control Plane (CU-CP) 210, one or more Central Unit User Planes (CU-UP) 212, one or more Distributed Units (DUs) 214-218, and one or more Antenna / Remote Radio Units (AU / RRUs) 220-224. CUs and DUs may also be referred to as gNB-CU and gNB-DU, respectively. One or more components of AN 208 may be implemented in gNB 226. AN 208 can communicate with one or more adjacent gNBs.

[0060] The CU-CP 210 can be connected to one or more of the DU 214-218. The CU-CP 210 and DU 214-218 can be connected via the F1-C interface. Figure 2 As shown, the CU-CP 210 can be connected to multiple DUs, but a DU can be connected to only one CU-CP. Although Figure 2 Only one CU-UP 212 is shown, but AN 208 may include multiple CU-UPs. CU-CP 210 selects the appropriate CU-UP for the requested service (e.g., for the UE).

[0061] CU-UP 212 can be connected to CU-CP 210. For example, CU-UP 212 and CU-CP 210 can be connected via the E1 interface. CU-CP 212 can be connected to one or more of DU 214-218. CU-UP 212 and DU 214-218 can be connected via the F1-U interface. Figure 2 As shown, CU-CP 210 can be connected to multiple CU-UPs, but CU-UPs can be connected to only one CU-CP.

[0062] A DU (such as DU 214, 216, and / or 218) can be responsible for one or more TRPs (transmit / receive points, which may include edge nodes (EN), edge units (EU), radio heads (RH), smart radio heads (SRH), etc.). DUs can be located at the edge of a network with radio frequency (RF) capabilities. DUs can be connected to multiple CU-UPs, which are connected to the same CU-CP (e.g., under the control of the same CU-CP) (e.g., for RAN sharing, Radio as a Service (RaaS), and service-specific deployments). DUs can be configured to provide services to UEs individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted). Each DU 214-216 can be connected to one AU / RRU of AU / RRU 220-224.

[0063] The CU-CP 210 can connect to multiple DUs, and these DUs can be connected to the same CU-UP 212 (e.g., under the control of the same CU-UP 212). Connections between the CU-UP 212 and the DUs can be established via the CU-CP 210. For example, bearer context management functions can be used to establish connections between the CU-UP 212 and the DUs. Data forwarding between CU-UP 212s can be performed via the Xn-U interface.

[0064] The distributed RAN 200 can support fronthaul schemes across different deployment types. For example, the RAN 200 architecture can be based on transmit network capabilities (e.g., bandwidth, latency, and / or jitter). The distributed RAN 200 can share features and / or components with LTE. For example, AN 208 can support dual connectivity with NR and can share common fronthaul for LTE and NR. The distributed RAN 200 can, for example, achieve cooperation between and within DUs 214-218 via CU-CP 212. Inter-DU interfaces may not be used.

[0065] Logical functions can be dynamically distributed across the distributed RAN 200. (Refer to...) Figure 3In more detail, the Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Media Access Control (MAC) layer, Physical (PHY) layer, and / or Radio Frequency (RF) layer may be adapted to be placed in the AN and / or UE.

[0066] Figure 3 A diagram illustrating an example of a communication protocol stack 300 for implementing a RAN (e.g., such as RAN 200) according to aspects of this disclosure is shown. The illustrated communication protocol stack 300 can be implemented by a device operating in a wireless communication system such as a 5G NR system (e.g., wireless communication network 100). In various examples, layers of the protocol stack 300 can be implemented as separate software modules, portions of a processor or ASIC, portions of non-co-located devices connected via communication links, or various combinations thereof. Co-located and non-co-located implementations can be used, for example, in a protocol stack for a network access device or a UE. Figure 3 As shown, the system can support various services on one or more protocols. One or more protocol layers of protocol stack 300 can be implemented by AN and / or UE.

[0067] like Figure 3 As shown, in AN (e.g., Figure 2 In AN 208, the protocol stack 300 is split. The RRC layer 305, PDCP layer 310, RLC layer 315, MAC layer 320, PHY layer 325, and RF layer 530 can be implemented by AN. For example, CU-CP (e.g., Figure 2 CU-CP 210) and CU-UP (e.g., Figure 2 Both CU-UP 212 and DU (e.g., CU-UP 212) can implement the RRC layer 305 and the PDCP layer 310. Figure 2 DU 214-218 in the code can implement RLC layer 315 and MAC layer 320. AU / RRU (e.g., Figure 2 The AU / RRU220-224 in the model can implement the PHY layer 325 and the RF layer 330. The PHY layer 325 can include a high PHY layer and a low PHY layer.

[0068] The UE can implement the entire protocol stack 300 (e.g., RRC layer 305, PDCP layer 310, RLC layer 315, MAC layer 320, PHY layer 325 and RF layer 330).

[0069] Figure 4 As shown (as in Figure 1The example components of BS 110 and UE 120 shown herein can be used to implement aspects of this disclosure. For example, antenna 452, processors 466, 458, 464 and / or controller / processor 480 of UE 120 can be configured to perform actions related to... Figure 11 The described operation, and a similar processor to the BS 110 can perform related operations. Figure 12 The described operation.

[0070] At BS 110, the transmit processor 420 can receive data from data source 412 and control information from controller / processor 440. The control information can be used for the Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Group Common PDCCH (GC PDCCH), etc. Data can be used for the Physical Downlink Shared Channel (PDSCH), etc. Processor 420 can process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. Processor 420 can also generate reference symbols, such as for the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Cell-Specific Reference (CRS) signals. The transmit (TX) Multiple-Input Multiple-Output (MIMO) processor 430 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols as needed, and can provide output symbol streams to modulators (MODs) 432a to 432t. Each modulator 432 can process its own 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 signal from modulators 432a to 432t can be transmitted via antennas 434a to 434t respectively.

[0071] At UE 120, antennas 452a to 452r can receive downlink signals from base station 110 and can provide the received signals to demodulators (DEMODs) in transceivers 454a to 454r respectively. Each demodulator 454 can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each demodulator can further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 456 can obtain received symbols from all demodulators 454a to 454r, perform MIMO detection on the received symbols when needed, and provide the detected symbols. Receiver processor 458 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120 to data sink 460, and provide decoded control information to controller / processor 480.

[0072] On the uplink, at UE 120, the transmitting processor 464 can receive and process data from data source 462 (e.g., for the Physical Uplink Shared Channel (PUSCH)) and control information from controller / processor 480 (e.g., for the Physical Uplink Control Channel (PUCCH)). The transmitting processor 464 can also generate reference symbols for reference signals (e.g., for Sounding Reference Signals (SRS)). Symbols from the transmitting processor 464 can be pre-encoded by the TX MIMO processor 466 when needed, further processed by demodulators in transceivers 454a to 454r (e.g., for SC-FDM, etc.), and transmitted to base station 110. At BS 110, uplink signals from UE 120 can be received by antenna 434, processed by modulator 432, detected by MIMO detector 436 when needed, and further processed by receiving processor 438 to obtain decoded data and control information transmitted by UE 120. The receiver processor 438 can provide decoded data to the data sink 439 and decoded control information to the controller / processor 440.

[0073] Controllers / processors 440 and 480 can direct operations at BS 110 and UE 120, respectively. Processor 440 and / or other processors and modules at BS 110 can execute or direct the execution of processes using the techniques described herein. Memory 442 and 482 can store data and program code for BS 110 and UE 120, respectively. Scheduler 444 can schedule the UE for data transmission on downlink and / or uplink.

[0074] Figure 5An example system architecture 500 for interoperability between 5GS (e.g., such as Distributed RAN 200) and E-UTRAN-EPC, according to certain aspects of this disclosure, is shown. Figure 5 As shown, UE 502 can be served by separate RANs 504A and 504B controlled by separate core networks 506A and 506B, where RAN 504A provides E-UTRA service and RAN 504B provides 5G NR service. The UE can operate under only one RAN / CN or under two RAN / CNs at a time.

[0075] In LTE, the basic transmission time interval (TTI), or packet duration, is a 1 ms subframe. In NR, the subframe is still 1 ms, but the basic TTI is called a slot. A subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16, ...), depending on the subcarrier spacing. NR RBs are 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing of 15 kHz and can define other subcarrier spacings relative to the basic spacing, such as 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. Symbol and slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing.

[0076] Figure 6 This diagram illustrates an example of frame format 600 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., 10 ms) and can be divided into 10 subframes with indices from 0 to 9, each subframe being 1 ms long. Each subframe can include a variable number of time slots depending on the subcarrier spacing. Each time slot can include a variable number of symbol periods depending on the subcarrier spacing (e.g., 7 or 14 symbols). Indices can be assigned to the symbol periods in each time slot. A small time slot (which may be referred to as a sub-time slot structure) refers to a transmission time interval with a duration less than that of a time slot (e.g., 2, 3, or 4 symbols).

[0077] Each symbol in a time slot can indicate the link direction used for data transmission (e.g., DL, UL, or flexible), and the link direction for each subframe can be dynamically switched. The link direction can be based on the time slot format. Each time slot can include DL / UL data as well as DL / UL control information.

[0078] In NR, synchronization signal (SS) blocks are transmitted. An SS block consists of a PSS, an SSS, and a double-symbol PBCH. SS blocks can be transmitted at fixed time slot locations (e.g., such as...). Figure 6Transmissions are shown in symbols 0-3. PSS and SSS can be used by the UE for cell search and acquisition. PSS provides half-frame timing, and SS provides CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries basic system information such as downlink system bandwidth, timing information within the radio frame, SS burst set periodicity, and system frame number. SS blocks can be organized into SS bursts to support beam scanning. Additional system information, such as Residual Minimum System Information (RMSI), System Information Block (SIB), and Other System Information (OSI), can be transmitted on the Physical Downlink Shared Channel (PDSCH) in certain subframes. For mmW, SS blocks can be transmitted up to sixty-four times, for example, using up to sixty-four different beam directions. Up to sixty-four transmissions of an SS block are called an SS burst set. SS blocks in an SS burst set are transmitted in the same frequency region, while SS blocks in different SS burst sets can be transmitted at different frequency locations.

[0079] In some cases, two or more dependent entities (e.g., UEs) can communicate with each other using sidelink signaling. Real-world applications of such sidelink communication can include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communication, Internet of Things (IoE) communication, IoT communication, mission-critical mesh, and / or various other suitable applications. Typically, sidelink signaling can refer to a signal transmitted from one dependent entity (e.g., UE1) to another dependent entity (e.g., UE2) without requiring relaying by a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, licensed spectrum can be used to transmit sidelink signals (unlike wireless LANs that typically use unlicensed spectrum).

[0080] The UE can operate in various radio resource configurations, including configurations associated with using a dedicated resource set to transmit pilot signals (e.g., Radio Resource Control (RRC) dedicated state, etc.) or configurations associated with using a common resource set to transmit pilot signals (e.g., RRC common state, etc.). When operating in RRC dedicated state, the UE can select the dedicated resource set for transmitting pilot signals to the network. When operating in RRC common state, the UE can select the common resource set for transmitting pilot signals to the network. In either case, the pilot signals transmitted by the UE can be received by one or more network access devices (such as AN or DU or portions thereof). Each receiving network access device can be configured to receive and measure pilot signals transmitted on the common resource set, and also to receive and measure pilot signals transmitted on the dedicated resource set allocated to the UE (for which the network access device is a member of a set of network access devices monitored for the UE). A CU that receives measurements from one or more network access devices or receives pilot signals sent to it by network access devices can use the measurements to identify the serving cell for a UE or initiate a change to the serving cell for one or more UEs.

[0081] Example RACH procedure

[0082] The Random Access Channel (RACH) is named as such because it refers to a radio channel (medium) that can be shared by multiple UEs and used by UEs to (randomly) access the network for communication. For example, RACH can be used for call setup and network access for data transmission. In some cases, RACH can be used for initial network access when a UE switches from Radio Resource Control (RRC) connection idle mode to active mode, or when switching from RRC connection mode. Furthermore, RACH can be used for downlink (DL) and / or uplink (UL) data arrivals when a UE is in RRC idle or RRC inactive mode, and when re-establishing a connection with the network.

[0083] Figure 7Figure 700 illustrates a timing (or “call flow”) diagram of an example four-step RACH procedure according to certain aspects of this disclosure. A first message (MSG1) may be transmitted from UE 120 to BS 110 on the Physical Random Access Channel (PRACH). In this case, MSG1 may only include the RACH preamble. BS 110 may respond with a Random Access Response (RAR) message (MSG2), which may include an identifier (ID) of the RACH preamble, timing advance (TA), uplink grant, cell radio network temporary identifier (C-RNTI), and fallback indicator. As shown, MSG2 may include PDCCH communication, which includes control information for subsequent communication on the PDSCH. In response to MSG2, MSG3 is transmitted from UE 120 to BS 110 on the PUSCH. MSG3 may include one or more of the following: RRC connection request, tracking area update request, system information request, location fixation or location signal request, or scheduling request. BS 110 then responds with MSG 4, which may include a contention resolution message.

[0084] In some cases, a two-step RACH process can be supported to speed up access. As the name suggests, a two-step RACH process can effectively "fold" the four messages of a four-step RACH process into two messages.

[0085] Figure 8 This is a timing diagram 800 illustrating an example two-step RACH procedure according to certain aspects of this disclosure. A first enhancement message (msgA) can be sent from UE 120 to BS 110. In some aspects, msgA includes some or all of the information from MSG1 and MSG3 from the four-step RACH procedure, thereby effectively combining MSG1 and MSG3. For example, msgA may include MSG1 and MSG3 multiplexed together, such as using time division multiplexing or frequency division multiplexing. In some aspects, msgA includes a RACH preamble and payload for random access. The msgA payload may include, for example, the UE-ID and other signaling information (e.g., Buffer Status Report (BSR)) or a scheduling request (SR). BS 110 may respond with a Random Access Response (RAR) message (msgB), which may effectively combine the aforementioned MSG2 and MSG4. For example, msgB may include the ID of the RACH preamble, timing advance (TA), backoff indicator, contention resolution message, UL / DL authorization, and transport power control (TPC) command.

[0086] In a two-step RACH process, msgA may include the RACH preamble and the payload. In some cases, the RACH preamble and payload may be sent during the msgA transmission.

[0087] The timing of random access message (msgA) transmission generally includes the timing of the msgA preamble (used to transmit the preamble signal) and the timing of the msgA payload (used to transmit the PUSCH). The transmission of the msgA preamble generally involves:

[0088] (1) Selection of the preamble sequence; and

[0089] (2) Selection of the timing of the preamble in the time / frequency domain (for transmitting the selected preamble sequence).

[0090] msgA payload transmission generally involves:

[0091] (1) Construction of the Random Access Message Payload (DMRS / PUSCH); and

[0092] (2) Selection of one or more PUSCH resource units (PRUs) in the time / frequency domain for transmitting the message (payload).

[0093] In some cases, the UE monitors SSB transmissions (transmitted by the gNB using a different beam) and associates them with a limited set of time / frequency resources that define the RACH timing (RO) and PRU. As will be described in more detail below, when detecting an SSB, the UE can select the RO and one or more PRUs associated with that SSB for the msgA transmission. The limited set of ROs and PRUs can help reduce the base station's monitoring overhead (blind decoding).

[0094] Two-step RACH has several advantages, such as access speed and the ability to send relatively small amounts of data without the overhead of a full four-step RACH process to establish a connection (when the four-step RACH message may be larger than the payload).

[0095] The two-step RACH procedure can operate in any RRC state and under any supported cell size. Networks using the two-step RACH procedure can typically support message (e.g., msgA) transmission with a limited number of MCS-level contention-based random access (CBRA) within a limited payload size.

[0096] Various technologies can be the focus of current wireless communication standards. For example, Rel-15 and / or Rel-16 can focus on high-end smartphones (e.g., enhanced mobile broadband (eMBB)) and other vertical sectors such as ultra-reliable low-latency communication (URLLC) and / or vehicle-to-everything (V2X) communication. In some wireless communication standards (e.g., Rel-17 and later), there may be a strong desire for new radios (NR) to be scaled and deployed in a more efficient and cost-effective manner. Therefore, a new type of UE with reduced capabilities (RedCap) has been introduced. Specifically, RedCap UEs can exhibit generally loose peak throughput, along with lower latency and / or reliability requirements.

[0097] Therefore, some design goals for NR RedCap UEs may include scalable resource allocation, enhanced coverage in DL and / or UL, power savings in all RRC states, and / or coexistence with NR high-end UEs. For example... Figure 9 As shown, the NR-RedCap UE can be a smart wearable device, a sensor / camera, or any other device configured for loosely coupled Internet of Things (IoT) communications. Furthermore, RedCap UE functions and / or capabilities can overlap with those of Long Term Evolution (LTE) and / or 5G devices (e.g., high-end 5G devices). For example, the functionality of a loosely coupled IoT device can overlap with that of a URLLC device, the functionality of a smart wearable device can overlap with that of a Low Power Wide Area (LPWA) Massive Machine Type Communication (mMTC) device, and / or the functionality of a sensor / camera can overlap with that of an eMBB device.

[0098] Example of reusing PUR and SRS

[0099] This disclosure provides techniques for reusing pre-configured uplink resources (PUR) and sounding reference signals (SRS). SRS can help improve the reliability of small data delivery (SDT) of the UE in connectionless mode, for example, by allowing the gNB to track changes in uplink timing offset and / or perform link adaptation.

[0100] (Introduced in version 16) PUR generally refers to a mechanism that pre-allocates radio resources to the UE for uplink data transmission without requiring a connection to be established. Typically, a set of PUR opportunities can be configured by the gNB in ​​the time, frequency, and / or spatial domains, where each opportunity is associated with a beamforming downlink (DL) reference signal (RS) (e.g., synchronization block (SSB)), channel state information (CSI), reference signal (RS), etc.). The gNB can configure the PUR using certain parameters (e.g., ConfiguredGrantConfig, rrc-ConfiguredUplinkGrant, srs-ResourceIndicator, repK, NR-U parameters).

[0101] The following text is about Figure 10 As further described, it can be assumed in the PUR timing configuration that the transmit (TX) and / or receive (RX) beams correspond.

[0102] PUR timing can be periodically configured based on a lookup table (LUT) or closed-form formula, which can be based on the periodicity of the PUR timing (e.g., in a time slot or subframe), the time slot / symbol offset of the PUR timing (e.g., in the subcarrier spacing (SCS) of the active UL bandwidth portion (BWP), and / or the duration of the PUR timing. When a PUR timing is associated with an SSB or periodic CSI-RS beam, a period (e.g., a PUR-to-SSB or CSI-RS association period or association pattern period) can be introduced to ensure that the PUR timing is mapped relatively uniformly to different receive beams. In some cases, an SSB-to-PUR association pattern period may include one or more SSB-to-PUR association periods. In some cases, an SSB-to-PUR association period may include one or more PUR configuration periods. In some cases, a PUR configuration period may be an integer multiple of the SSB or CSI-RS burst period.

[0103] Figure 10 Figure 1000 illustrates the beam association of a PUR group. As shown, a PUR group may include one or more PUR times. As illustrated, to receive UL transmissions from a specific PUR group, the gNB can use an uplink beam corresponding to the downlink beam (e.g., the beam used to transmit downlink reference signals (CSI-RS and / or SSB)). For example, for the DL beam X 1002 serving the gNB, the gNB uses the same beam to receive transmissions from PUR group G. x UL transmission. Similarly, for the DL beam Y 1004 serving the gNB, the gNB receives data from the PUR group G. Y The same beam is used during UL transmission.

[0104] Some aspects provide techniques for multiplexing PUR timing and SRS (e.g., for SDT). For example, some aspects may allow SRS-assisted tracking area (TA) tracking, channel sounding / location, and / or (e.g., beam association between Channel State Information (CSI) Reference Signal (RS) and / or Synchronization Signal Block (SSB) and PUR / SRS).

[0105] In the case of techniques that reuse PUR timing and SRS for channel sounding / location, the UE can transmit SRS for UL and DL positioning while inactive. The spatial relationships for SRS transmissions for positioning via RRC_CONNECTED UEs, as defined in Release 16, can also be applied to RRC_INACTIV UEs. Inactive positioning may occur under certain authentication criteria. SRS transmitted for positioning can be periodic, semi-persistent, or aperiodic. In one example, if the SRS is periodic and configured to delay the Mobile Terminal Location Request (MT-LR) positioning process, the gNB can configure the SRS for the UE using certain inactive state authentication criteria (i.e., RRCRelease with suspendConfig).

[0106] Furthermore, the aspects described herein can enable network entities (e.g., gNBs) to track changes in uplink (UL) timing offset, obtain CSI reports to perform link adaptation, and / or calculate one or more location-related metrics (e.g., UL time difference of arrival (TDOA) and / or angle of arrival (AoA)) for inactive / idle UEs (e.g., those with low mobility).

[0107] Figure 11 An example operation 1100 of wireless communication performed by a user equipment (UE) is shown. According to certain aspects of this disclosure, operation 1100 can be performed, for example, by a UE (e.g., UE 120a in wireless communication network 100) to multiplex PUR and SRS.

[0108] Operation 1100 begins at 1102 with the reception of signaling configuring resources for the UE for PUR timings and resources for SRS transmissions. The signaling can be received via a single message (e.g., with different fields) or configured by separate messages. Furthermore, separate periods can be configured for PUR timings and SRS transmissions (e.g., so that SRS is multiplexed only in some PUR timings).

[0109] At 1104, the UE transmits SRS according to the configuration, combining one or more of the PUR timings. For example, as... Figures 14A to 14BAs shown, time-division multiplexing can be used to transmit SRS when there is a (configurable) transmission gap between the PUR timing and the SRS transmission, or as... Figure 14C As shown, frequency division multiplexing can be used to transmit SRS on overlapping time resources.

[0110] Figure 12 Example operation 1200 for wireless communication performed by a network entity is shown and can be considered as a response to... Figure 11 This is a supplement to operation 1100. For example, operation 1200 can be executed by BS 110 (e.g., gNB) to handle the execution. Figure 11 The operation of UE 1100 is timed to reuse SRS with PUR timing.

[0111] Operation 1200 begins at 1202 with the transmission of UE signaling to configure resources for PUR timing and resources for SRS transmission for the UE.

[0112] At 1204, the network entity monitors the SRS based on the configuration and in combination with one or more of the PUR timings.

[0113] Figure 13 This is an example timeline for multiplexing a Sounding Reference Signal (SRS) with a Pursuit Period (PUR) timing, e.g., for a UE in an idle / inactive mode, according to certain aspects of this disclosure. As shown, the PUR timing can occur periodically, and the UE can multiplex the SRS with one or more of the PUR timings. The SRS can assist the gNB in ​​timing advance (TA) tracking, positioning, and / or link adaptation. As shown, the SRS can help improve the reliability of various transmissions such as PUR acknowledgments (ACK), TA commands, power control (PC) commands, transport block size (TBS), and / or modulation and decoding scheme (MCS) reconfiguration for the PUR and / or PUR / SRS resource / periodic (re)configuration.

[0114] Resource (re)configuration for PUR and / or SRS can be accomplished via dedicated radio resource control RRC signaling (e.g., when the UE is connected), RRC release messages, media access control (MAC) control elements (CE), and / or downlink control information (DCI).

[0115] In some respects, the SRS can be quasi-co-located with the PUR (e.g., QCL'd). Resources / signals can be considered QCL'd if the properties of the channel conveying one can be inferred from the channel conveying the other. In some cases, the TX beam for the SRS and / or PUR can be associated with the RX beam for the SSB or CSI-RS (e.g., scheduled for RRC idle / inactive UEs).

[0116] Depending on certain aspects, the QCL relationship between SRS and PUR can be configured in the PUR configuration message. In this case, the PUR configuration message can be sent by the BS via dedicated RRC signaling (e.g., when the UE is in a connected state), an RRC release message, or via MAC CE (e.g., msg4 / msgB of the Random Access Channel (RACH) procedure). The spatial relationships for SRS transmissions defined in Rel.16 for RRC_CONNECTED UEs apply to RRC_INACTIVE UEs.

[0117] In some aspects, such as Figures 14A to 14C As shown, SRS can be multiplexed with PUR in the frequency domain and / or time domain. Furthermore, as... Figure 14A and Figure 14B As shown, configurable transmission gaps can exist when PUR and SRS are multiplexed in the time domain. Figure 14C As shown, frequency division multiplexing (FDM) can be used to transmit PUR and SRS simultaneously (overlapping in the time domain).

[0118] In some respects, a UE may request (e.g., "on-demand request") SRS resources multiplexed with the PUR transmission timing. In this case, the UE's request for the multiplexed SRS may be part of a PUR configuration request or a reconfiguration request. In one example, SRS resources multiplexed with the PUR transmission timing may be implemented on demand for channel sounding / location. The UE's on-demand request for the multiplexed SRS may be transmitted on a UCI multiplexed on PUSCH, PUCCH, or PUSCH.

[0119] In some cases, the gNB can acknowledge (or reject) an SRS request received from the UE. In this case, the gNB can signal the scheduling decision for SRS in a PUR configuration message or a reconfiguration message. For example, the PUR configuration / reconfiguration message can be sent by the gNB in ​​a dedicated RRC signaling (e.g., when the UE is in a connected state), an RRC release message, or (e.g., msg4 / msgB of the RACH procedure) MAC CE.

[0120] Figure 15 The illustration shows operations that may include those configured to perform the techniques disclosed herein, such as Figure 11The communication device 1500 is illustrated with various components (e.g., corresponding to component plus functional components) of the operation shown. The communication device 1500 includes a processing system 1502 coupled to a transceiver 1508. The transceiver 1508 is configured to transmit and receive signals, such as the various signals described herein, for the communication device 1500 via an antenna 1510. The processing system 1502 may be configured to perform processing functions of the communication device 1500, including processing signals received and / or to be transmitted by the communication device 1500.

[0121] Processing system 1502 includes processor 1504 coupled to computer-readable medium / memory 1512 via bus 1506. In some aspects, computer-readable medium / memory 1512 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1504, cause processor 1504 to perform... Figure 11 The operations shown herein, or other operations used to perform the various techniques discussed herein. In some aspects, the computer-readable medium / memory 1512 stores code 1514 for receiving signaling to configure resources for a PUR timing and resources for SRS transmission for the UE; and code 1516 for transmitting SRS in conjunction with one or more PUR timings according to the configuration. In some aspects, the processor 1504 has circuitry configured to implement the code stored in the computer-readable medium / memory 1512. The processor 1504 includes circuitry 1518 for receiving signaling to configure resources for a PUR timing and resources for SRS transmission for the UE; and circuitry 1520 for transmitting SRS in conjunction with one or more PUR timings according to the configuration.

[0122] Figure 16 The illustration shows operations that may include those configured to perform the techniques disclosed herein, such as Figure 12 The communication device 1600 is illustrated with various components (e.g., corresponding to component plus functional components) of the operation shown. The communication device 1600 includes a processing system 1602 coupled to a transceiver 1608. The transceiver 1608 is configured to transmit and receive signals, such as the various signals described herein, for the communication device 1600 via an antenna 1610. The processing system 1602 may be configured to perform processing functions of the communication device 1600, including processing signals received and / or to be transmitted by the communication device 1600.

[0123] Processing system 1602 includes processor 1604 coupled to computer-readable medium / memory 1612 via bus 1606. In some aspects, computer-readable medium / memory 1612 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1604, cause processor 1604 to perform... Figure 12The operations shown herein, or other operations used to perform the various techniques discussed herein. In some aspects, the computer-readable medium / memory 1612 stores code 1614 for transmitting UE signaling to configure resources for PUR timing and resources for SRS transmission for the UE; and code 1616 for monitoring SRS in conjunction with one or more PUR timings according to the configuration. In some aspects, the processor 1604 has circuitry configured to implement the code stored in the computer-readable medium / memory 1612. The processor 1604 includes circuitry 1618 for transmitting UE signaling to configure resources for PUR timing and resources for SRS transmission for the UE; and circuitry 1620 for monitoring SRS in conjunction with one or more PUR timings according to the configuration.

[0124] Example

[0125] Aspect 1: An apparatus for wireless communication performed by a user equipment (UE), comprising a memory and at least one processor coupled to the memory, the memory and at least one processor being configured to receive signaling for configuring resources for pre-configured uplink resource (PUR) timing and resources for transmitting sounding reference signals (SRS) for the UE, and to transmit SRS in combination with one or more of the PUR timings according to the configuration.

[0126] Aspect 2: The apparatus according to aspect 1, wherein when the UE is in an idle or inactive mode, the SRS transmission is multiplexed together with the data transmitted during the PUR timing.

[0127] Aspect 3: The apparatus according to aspect 2, wherein the SRS transmission is multiplexed in the time domain.

[0128] Aspect 4: The apparatus according to either aspect 2 or 3, wherein the signaling further configures the transmission time gap between the PUR timing and the SRS transmission for the UE.

[0129] Aspect 5: The apparatus according to any one of aspects 2 to 4, wherein the SRS transmission is multiplexed in the frequency domain.

[0130] Aspect 6: The apparatus according to any one of aspects 1 to 5, wherein the periodicity of the PUR timing and the SRS resources are configured separately.

[0131] Aspect 7: The apparatus according to any one of aspects 1 to 6, wherein the apparatus is further configured to receive signaling for reconfiguring at least one of resources for PUR timing or resources for SRS transmission.

[0132] Aspect 8: The apparatus according to any one of Aspects 1 to 7, wherein at least one of the signaling for configuring the UE or the signaling for reconfiguring the UE includes dedicated radio resource control (RRC) signaling or an RRC release message.

[0133] Aspect 9: The apparatus according to any one of aspects 1 to 8, wherein at least one of the signaling for configuring the UE or the signaling for reconfiguring the UE includes a Media Access Control (MAC) element (CE) or downlink control information (DCI).

[0134] Aspect 10: The apparatus according to any one of aspects 1 to 9, wherein the SRS transmission and PUR timing resources have a quasi-co-located (QCL) relationship.

[0135] Aspect 11: The apparatus according to aspect 10, wherein the SRS is transmitted using a transmission beam associated with a receive beam of at least one downlink reference signal.

[0136] Aspect 12: The apparatus according to any one of aspects 10 or 11, wherein the signaling configuring resources for the UE for the PUR timing includes a PUR configuration message, and the QCL relationship is configured via the PUR configuration message.

[0137] Aspect 13: The apparatus according to aspect 12, wherein the PUR configuration message is sent via dedicated radio resource control (RRC) signaling or an RRC release message.

[0138] Aspect 14: The apparatus according to any one of aspects 12 or 13, wherein, as part of the random access channel (RACH) procedure, the PUR configuration message is sent via the media access control (MAC) control element (CE) of the downlink message.

[0139] Aspect 15: The apparatus according to any one of aspects 1 to 14, wherein the apparatus is further configured to send a request for an SRS resource.

[0140] Aspect 16: The apparatus according to aspect 15, wherein the request is included in the PUR configuration request.

[0141] Aspect 17: The apparatus according to any one of aspects 15 or 16, wherein the request is sent on the Physical Uplink Shared Channel (PUSCH), the Physical Uplink Control Channel (PUCCH), or Uplink Control Information (UCI) multiplexed with the PUSCH.

[0142] Aspect 18: The apparatus according to any one of aspects 15 to 16, wherein the apparatus is further configured to receive a response indicating a scheduling decision included in a PUR configuration message.

[0143] Aspect 19: An apparatus for wireless communication performed by a network entity, comprising a memory and at least one processor coupled to the memory, the memory and at least one processor being configured to transmit UE signaling configuring resources for PUR timing and resources for SRS transmission for a UE, and to monitor SRS in conjunction with one or more of the PUR timings according to the configuration.

[0144] Aspect 20: The apparatus according to aspect 19, wherein when the UE is in an idle or inactive mode, the network entity monitors the SRS transmission multiplexed with the data transmitted during the PUR timing.

[0145] Aspect 21: The apparatus according to aspect 20, wherein the SRS transmission is multiplexed in the time domain.

[0146] Aspect 22: The apparatus according to either aspect 20 or 21, wherein the signaling further configures the transmission time gap between the PUR timing and the SRS transmission for the UE.

[0147] Aspect 23: The apparatus according to any one of aspects 20 to 22, wherein the SRS transmission is multiplexed in the frequency domain.

[0148] Aspect 24: The apparatus according to any one of aspects 19 to 23, wherein the network entity individually configures the periodicity of PUR timing and SRS resources.

[0149] Aspect 25: The apparatus according to any one of aspects 19 to 24 further includes: transmitting UE signaling for reconfiguring at least one of resources for PUR timing or resources for SRS transmission.

[0150] Aspect 26: The apparatus according to any one of aspects 19 to 25, wherein at least one of the signaling for configuring the UE or the signaling for reconfiguring the UE includes dedicated RRC signaling or an RRC release message.

[0151] Aspect 27: The apparatus according to any one of aspects 19 to 26, wherein at least one of the signaling for configuring the UE or the signaling for reconfiguring the UE includes MAC CE or DCI.

[0152] Aspect 28: The apparatus according to any one of aspects 19 to 27, wherein the SRS transmission and PUR timing resources have a QCL relationship.

[0153] Aspect 29: The apparatus according to aspect 28, wherein the network entity uses a receive beam associated with a transmit beam of at least one downlink reference signal to monitor the SRS.

[0154] Aspect 30: The apparatus according to any one of aspects 28 or 29, wherein the signaling configuring resources for the UE for the PUR timing includes a PUR configuration message, and the QCL relationship is configured via the PUR configuration message.

[0155] Aspect 31: The apparatus according to aspect 30, wherein the PUR configuration message is sent via dedicated RRC signaling or RRC release message.

[0156] Aspect 32: The apparatus according to any one of aspects 30 or 31, wherein, as part of the RACH process, the PUR configuration message is sent via the MAC CE of the downlink message.

[0157] Aspect 33: The apparatus according to any one of aspects 19 to 32, wherein the apparatus is further configured to track uplink timing based on a monitored SRS.

[0158] Aspect 34: The apparatus according to any one of aspects 19 to 33, wherein the apparatus is further configured to use monitored SRS transmissions to obtain a CSI report from the UE and to perform link adaptation based on the CSI report.

[0159] Aspect 35: The apparatus according to any one of aspects 19 to 34, wherein the apparatus is further configured to calculate one or more location-related metrics for the UE based on the monitored SRS.

[0160] Aspect 36: The apparatus according to aspect 35, wherein the location-related metric includes uplink TDOA.

[0161] Aspect 37: The apparatus according to any one of aspect 35 or aspect 26, wherein the position-related metric includes AoA.

[0162] Aspect 38: The apparatus according to any one of aspects 19 to 37, wherein the apparatus is further configured to receive a request for an SRS resource.

[0163] Aspect 39: The apparatus according to aspect 38, wherein the request is included in the PUR configuration request.

[0164] Aspect 40: The apparatus according to any one of Aspect 38 or Aspect 39, wherein the request is received on PUSCH, PUCCH or UCI multiplexed with PUSCH.

[0165] Aspect 41: The apparatus according to any one of aspects 38 to 40, wherein the apparatus is further configured to send a response indicating a scheduling decision included in a PUR configuration message.

[0166] Aspect 42: A method for wireless communication performed by a UE, comprising receiving signaling configuring resources for a PUR timing and resources for SRS transmission for the UE, and transmitting SRS in combination with one or more of the PUR timings according to the configuration.

[0167] Aspect 43: A computer-readable medium having instructions stored thereon for receiving signaling for configuring resources for a PUR timing and resources for SRS transmission for a UE, and for transmitting SRS in combination with one or more of the PUR timings according to the configuration.

[0168] Aspect 44: An apparatus for wireless communication performed by a UE, comprising a component for receiving signaling configuring resources for a PUR timing and resources for SRS transmission for the UE, and a component for transmitting SRS in combination with one or more of the PUR timings according to the configuration.

[0169] Aspect 45: A method for wireless communication performed by a UE, comprising transmitting UE signaling to configure resources for PUR timing and resources for SRS transmission for the UE, and monitoring SRS in conjunction with one or more of the PUR timings according to the configuration.

[0170] Aspect 46: A computer-readable medium having instructions stored thereon for transmitting signaling to configure resources for PUR timing and resources for SRS transmission for a UE, and to monitor SRS in conjunction with one or more of the PUR timings according to the configuration.

[0171] Aspect 47: An apparatus for wireless communication performed by a UE, comprising a component for transmitting signaling for configuring resources for PUR timing and resources for SRS transmission for the UE, and a component for monitoring SRS in conjunction with one or more of the PUR timings according to the configuration.

[0172] The technologies described in this article can be used in 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. CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA) and cdma2000. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers the IS-2000, IS-95, and IS-856 standards. TDMA networks can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can 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 parts of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). NR is an emerging wireless communication technology under development.

[0173] The techniques described herein can be used in the wireless networks and radio technologies mentioned above, as well as other wireless networks and radio technologies. For clarity, although terms commonly associated with 3G, 4G, and / or 5G wireless technologies may be used to describe aspects herein, the aspects of this disclosure can be applied to other generation-based communication systems.

[0174] In 3GPP, depending on the context in which the term is used, the term "cell" can refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area. In NR systems, the term "cell" is used interchangeably with BS, Next Generation Node B (gNB or gNodeB), Access Point (AP), Distributed Unit (DU), and Carrier or Transmitter / Receive Point (TRP). A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access for UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access for UEs associated with the femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs of users in a home, etc.). A BS used for a macrocell can be called a macro BS. A BS used for a picocell can be called a pico BS. A BS for a femtocell can be called a femto BS or a home BS.

[0175] A UE can also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable devices such as smartwatches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart rings, smart bracelets, etc.), entertainment devices (e.g., music devices, video devices, satellite radios, etc.), vehicle components or sensors, smart meters / sensors, industrial manufacturing equipment, GPS equipment, or any other suitable device configured to communicate via wireless or wired media. Some UEs can be considered as machine-type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include devices capable of communicating with a BS, another device (e.g., a remote device), or other entities such as robots, drones, remote devices, sensors, meters, monitors, location tags, etc. Wireless nodes can provide connectivity, for example, via wired or wireless communication links to or from a network (e.g., a wide area network such as the Internet or cellular networks). Some UEs can be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0176] Some wireless networks (e.g., LTE) utilize Orthogonal Frequency Division Multiplexing (OFDM) on the downlink and Single-Carrier Frequency Division Multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, frequency bands, etc. Each subcarrier can be modulated using data. Generally, modulation symbols are transmitted using OFDM in the frequency domain and SC-FDM in the time domain. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the subcarrier spacing could be 15 kHz, and the minimum resource allocation (called a "resource block" (RB)) could be 12 subcarriers (or 180 kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, the nominal Fast Fourier Transform (FFT) step size could be 128, 256, 512, 1024, or 2048, respectively. System bandwidth can also be divided into subbands. For example, a subband can cover 1.08 MHz (e.g., 6 RBs), and for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, there can be 1, 2, 4, 8, or 16 subbands respectively. In LTE, the basic transmission time interval (TTI) or packet duration is a 1 ms subframe.

[0177] NR can use OFDM with CP on both uplink and downlink and includes support for half-duplex operation using TDD. In NR, subframes are still 1 ms, but the basic TTI is called a slot. Subframes contain a variable number of slots depending on the subcarrier spacing (e.g., 1, 2, 4, 8, 16, ... slots). NR RBs are 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing of 15 kHz and can define other subcarrier spacings relative to, for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. Symbol and slot lengths are proportional to the subcarrier spacing. CP length also depends on the subcarrier spacing. Beamforming can be supported and beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. In some examples, MIMO configurations in DL can support 8 transmit antennas for multilayer DL transmission with up to 8 streams and up to 2 streams per UE. In some examples, multilayer transmission with up to 2 streams per UE can be supported. It can support aggregation of multiple cells with up to 8 service cells.

[0178] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication between some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, the subordinate entity utilizes the resources allocated by the scheduling entity. A base station is not the only entity that can act as a scheduling entity. In some examples, a UE can act as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can utilize the resources scheduled by that UE for wireless communication. In some examples, a UE can act as a scheduling entity in peer-to-peer (P2P) networks and / or mesh networks. In mesh network examples, in addition to communicating with a scheduling entity, UEs can also communicate directly with each other.

[0179] In some examples, two or more dependent entities (e.g., UEs) can communicate with each other using sidelink signaling. Practical applications of such sidelink communication can include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communication, Internet of Things (IoE) communication, IoT communication, mission-critical mesh, and / or various other suitable applications. Typically, a sidelink signal can refer to a signal that, even if a scheduling entity can be used for scheduling and / or control purposes, communication from one dependent entity (e.g., UE1) to another dependent entity (e.g., UE2) is not relayed through the scheduling entity (e.g., UE or BS). In some examples, licensed spectrum can be used to transmit sidelink signals (unlike wireless LANs that typically use unlicensed spectrum).

[0180] The methods disclosed herein include one or more steps or actions for implementing the methods. The method steps and / or actions may be interchanged with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of a particular step and / or action may be modified without departing from the scope of the claims.

[0181] As used herein, the phrase “at least one of” in a list of items refers to any combination of these items, including a single member. 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 multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other order of a, b, and c).

[0182] As used herein, the term "determine" encompasses a wide range of actions. For example, "determine" can include calculating, computing, processing, deriving, investigating, searching (e.g., looking in a table, database, or other data structure), ascertaining, etc. Furthermore, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), etc. Additionally, "determine" can include resolving, selecting, extracting, establishing, etc.

[0183] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but will be given the full scope consistent with the language of the claims, wherein, unless specifically stated otherwise, an element referred to in the singular is not intended to mean “one and only one”, but rather “one or more.” Unless expressly stated otherwise, the term “some” means one or more. All structural and functional equivalents of elements throughout the various aspects described in this disclosure that are known to or will be known hereafter by a person of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be contributed to the public, whether or not such disclosure is expressly stated in the claims. Unless an element is expressly stated using the phrase “component for…”, or, in the case of a method claim, using the phrase “step for…”, an element of a claim is not to be construed in accordance with 35 USC §112(f).

[0184] The various operations described above can be performed by any suitable component capable of performing the corresponding function. Components may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors. Typically, in the case of operations as shown in the figures, these operations may have corresponding paired components with similar numbering plus functional components.

[0185] The various illustrative logic blocks, modules, and circuits described in this 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. The general-purpose processor may be a microprocessor, but alternatively, 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, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0186] If implemented in hardware, the example hardware configuration may include a processing system in a wireless node. The processing system can be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnect buses and bridges. The bus can link various circuits together, including processors, machine-readable media, and bus interfaces. Furthermore, the bus interface can be used to connect network adapters, etc., to the processing system via the bus. The network adapter can be used to implement signal processing functions at the PHY layer. In user terminal 120 (see...) Figure 1 In this case, the user interface (e.g., keyboard, display, mouse, joystick, etc.) can also be connected to the bus. The bus can also link various other circuits known in the art and therefore not further described, such as timing sources, peripherals, voltage regulators, power management circuits, etc. The processor can be implemented using one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. Those skilled in the art will recognize how the described functionality is best implemented for the processing system depending on the specific application and the overall design constraints imposed on the system as a whole.

[0187] If implemented in software, functionality can be stored or transmitted on or on a computer-readable medium as one or more instructions or code. Software should be interpreted broadly as representing instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media includes both computer storage media and communication media, with communication media encompassing any medium that facilitates the transfer 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 modules stored on the machine-readable storage medium. The computer-readable storage medium can be coupled to the processor, allowing the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be integrated into the processor. By way of example, machine-readable media may include transmission lines, carrier waves modulated by data, and / or computer-readable storage media with instructions stored thereon, separate from the wireless node, all of which can be accessed by the processor via a bus interface. Alternatively or additionally, the machine-readable medium or any portion thereof may be integrated into the processor (e.g., for caches and / or general-purpose register files). By way of 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, disks, optical disks, hard disks, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in computer program products.

[0188] Software modules can comprise a single instruction or a number of instructions, and can be distributed across several different code segments, different programs, and multiple storage media. Computer-readable media can include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause the processing system to perform various functions. Software modules can include sending modules and receiving modules. Each software module can reside in a single storage device or be distributed across multiple storage devices. For example, when a triggering event occurs, a software module can be loaded from a hard disk drive into RAM. During the execution of a software module, the processor can load some of the instructions into a cache to improve access speed. One or more cache lines can then be loaded into a general-purpose register file for processor execution. When referring to the functionality of a software module below, it should be understood that such functionality is implemented by the processor when instructions from that software module are executed.

[0189] Furthermore, any connection is properly referred to as a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared (IR), radio, and microwave are included in the definition of medium. As used herein, discs and platters include compact discs (CDs), laser discs, optical discs, digital versatile discs (DVDs), floppy discs, and Blu-ray discs, wherein discs typically magnetically reproduce data, while platters optically reproduce data using lasers. Therefore, in some aspects, a computer-readable medium may include a non-transitory computer-readable medium (e.g., tangible media). Furthermore, in other aspects, a computer-readable medium may include a transient computer-readable medium (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.

[0190] Therefore, 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 (and / or encoded) instructions stored thereon that can be executed by one or more processors to perform the operations described herein, such as instructions for performing the operations described herein and... Figure 11 and / or Figure 12 The operation shown.

[0191] Furthermore, it should be understood that modules and / or other suitable components for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of components for performing the methods described herein. Alternatively, the various methods described herein can be provided via storage components (e.g., RAM, ROM, physical storage media such as CDs or floppy disks), enabling the user terminal and / or base station to obtain the various methods when the storage components are coupled to or provided to the device. Additionally, any other suitable techniques for providing the methods and techniques described herein to the device can be utilized.

[0192] It should be understood that the claims are not limited to the precise configuration and components described above. Various modifications, alterations, and variations may be made to 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 performed by a user equipment (UE), comprising: A memory and at least one processor coupled to the memory, the memory and the at least one processor being configured as follows: Receive signaling for configuring resources for pre-configured uplink resource PUR timing and resources for sounding reference signal SRS transmission for the UE; as well as Based on the configuration, SRS is transmitted in conjunction with one or more of the PUR timings. Specifically, transmitting SRS in conjunction with one or more of the PUR timings includes multiplexing SRS transmissions with data transmitted during the PUR timings when the UE is in an idle or inactive mode.

2. The apparatus according to claim 1, wherein, SRS transmission and PUR timing are multiplexed in the time domain.

3. The apparatus according to claim 1, wherein, The signaling also configures the transmission time gap between the PUR timing and the SRS transmission for the UE.

4. The apparatus according to claim 1, wherein, SRS transmission and PUR timing are multiplexed in the frequency domain.

5. The apparatus according to claim 1, wherein, The PUR timing and the periodicity of the SRS resources are configured separately; and the SRS resource configuration can be periodic, semi-persistent, or aperiodic.

6. The apparatus according to claim 1, wherein, The memory and at least one processor are also configured to receive signaling for reconfiguring at least one of the resources for PUR timing or for SRS transmission for the UE.

7. The apparatus according to claim 6, wherein, At least one of the signaling messages configured or reconfigured for the UE includes dedicated radio resource control (RRC) signaling or an RRC release message.

8. The apparatus according to claim 6, wherein, At least one of the signaling configured or reconfigured for the UE includes a Media Access Control (MAC) element (CE) or a Downlink Control Information (DCI), and the at least one of the signaling configured or reconfigured for the UE further includes a power control message for the PUR timing or SRS transmission, a timing advance tracking message for the PUR timing or SRS transmission, a resource allocation reconfiguration for the PUR timing or SRS transmission, or a periodic reconfiguration for the PUR timing or SRS transmission.

9. The apparatus according to claim 1, wherein, The SRS transmission and PUR timing resources have a quasi-co-located QCL relationship.

10. The apparatus according to claim 9, wherein, The SRS is transmitted using a transmission beam (spatial domain transmission filter) associated with the receive beam of at least one downlink reference signal.

11. The apparatus according to claim 9, wherein: The signaling that configures resources for SRS and PUR timings for the UE includes a configuration message; and The QCL relationship is configured via the configuration message.

12. The apparatus according to claim 11, wherein, The configuration message is sent via dedicated radio resource control (RRC) signaling or an RRC release message.

13. The apparatus according to claim 11, wherein, As part of the Random Access Channel (RACH) procedure, the configuration message is sent via the Media Access Control (MAC) control element (CE) of the downlink message.

14. The apparatus according to claim 1, wherein, The memory and at least one processor are also configured to send requests for on-demand SRS resource configuration.

15. The apparatus according to claim 14, wherein, The request for on-demand SRS resource configuration is included in the PUR configuration request.

16. The apparatus according to claim 14, wherein, The requests for on-demand SRS resource configuration and UE assistance information are transmitted on the Physical Uplink Shared Channel (PUSCH), the Physical Uplink Control Channel (PUCCH), or the Uplink Control Information (UCI) multiplexed with the PUSCH.

17. The apparatus according to claim 14, wherein, The memory and at least one processor are also configured to receive a response indicating a scheduling decision included in the PUR reconfiguration message.

18. An apparatus for wireless communication performed by a network entity, comprising: A memory and at least one processor coupled to the memory, the memory and the at least one processor being configured as follows: Send UE signaling to configure resources for pre-configured uplink resource PUR timing and resources for SRS transmission detection reference signal; and Based on the configuration, SRS is monitored in conjunction with one or more of the PUR timings. When the UE is in idle or inactive mode, the network entity monitors the SRS transmission that is multiplexed with the data transmitted during the PUR.

19. The apparatus according to claim 18, wherein, SRS transmissions are multiplexed in the time domain.

20. The apparatus according to claim 18, wherein, The signaling also configures the transmission time gap between the PUR timing and the SRS transmission for the UE.

21. The apparatus according to claim 18, wherein, SRS transmission is multiplexed in the frequency domain.

22. The apparatus according to claim 18, wherein, The network entity configures the PUR timing and the periodicity of the SRS resources individually.

23. The apparatus according to claim 18, wherein, The memory and at least one processor are also configured to send UE signaling for at least one of the resources reconfigured for PUR timing or for SRS transmission.

24. The apparatus according to claim 18, wherein, At least one of the signaling messages configured or reconfigured for the UE includes dedicated radio resource control (RRC) signaling or an RRC release message.

25. The apparatus according to claim 18, wherein, At least one of the signaling configurations or reconfigurations of the UE includes a Media Access Control (MAC) element (CE) or Downlink Control Information (DCI).

26. The apparatus according to claim 18, wherein, The SRS transmission and PUR timing resources have a quasi-co-located QCL relationship.

27. A method for wireless communication performed by a user equipment (UE), comprising: Receive signaling for configuring resources for pre-configured uplink resource PUR timing and resources for sounding reference signal SRS transmission for the UE; as well as Based on the configuration, SRS is transmitted in conjunction with one or more of the PUR timings. Specifically, transmitting SRS in conjunction with one or more of the PUR timings includes multiplexing SRS transmissions with data transmitted during the PUR timings when the UE is in an idle or inactive mode.

28. A method for wireless communication performed by a network entity, comprising: Send UE signaling to configure resources for pre-configured uplink resource PUR timing and resources for probe reference signal SRS transmission for user equipment (UE); as well as Based on the configuration, SRS is monitored in conjunction with one or more of the PUR timings. Monitoring SRS in conjunction with one or more of the PUR timings includes: monitoring SRS transmissions that multiplex data transmitted during the PUR timing when the UE is in an idle or inactive mode.

29. An apparatus for wireless communication performed by a user equipment (UE), the apparatus comprising components for performing the method according to claim 27.

30. An apparatus for wireless communication performed by a network entity, the apparatus comprising components for performing the method according to claim 28.

31. A computer-readable medium having program code recorded thereon, wherein the program code is executable by one or more processors of a user equipment (UE) to cause the processor to perform the method of claim 27.

32. A computer-readable medium having program code recorded thereon, wherein the program code is executable by one or more processors of a network entity to cause the processors to perform the method of claim 28.

33. A computer program product comprising computer-readable instructions that, when executed by a processor, cause the processor to perform the method according to any one of claims 27 to 28.

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