Reporting of number of spatial domain bases for multiple transmit-receive points

Abstract

Certain aspects of the present disclosure provide a method of wireless communication by a user equipment (UE). The method includes: receiving configuration information indicating a resource for transmitting a reception point (TRP) set; selecting a code point from a set of code points based at least in part on an amount of TRP in the set of TRP and a total amount of spatial domain (SD) bases for the set of TRP, the code point indicating an amount of SD bases selected by the UE for each TRP in the set of TRP; and transmitting channel state information (CSI) signaling, the channel state information (CSI) signaling including an indication of the code point indicating the amount of SD bases for each TRP.

Description

Background Art Technical Field

[0001] Aspects of the present disclosure relate to wireless communications, and more particularly to techniques for reporting a number of spatial domain bases for multiple transmit-receive points.

[0002] Related technologies

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts or other similar types of services. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available wireless communication system resources with those users.

[0004] Although wireless communication systems have made tremendous technical progress over the years, challenges still exist. For example, complex and dynamic environments can still attenuate or block signals between wireless transmitters and wireless receivers. Therefore, there is a continuous desire to improve the technical performance of wireless communication systems, including, for example: improving the speed and data carrying capacity of communications, improving the efficiency of using shared communication media, reducing the power used by transmitters and receivers when performing communications, improving the reliability of wireless communications, avoiding redundant transmission and / or reception and related processing, improving the coverage area of ​​wireless communications, increasing the number and types of devices that can access wireless communication systems, increasing the ability of different types of devices to communicate with each other, increasing the number and types of wireless communication media available for use, etc. Therefore, there is a need to further improve wireless communication systems to overcome the aforementioned technical challenges and other challenges. Summary of the invention

[0005] One aspect provides a method for wireless communication at a user equipment (UE). The method includes: receiving configuration information indicating resources for a transmit reception point (TRP) set; selecting a code point from a code point set based at least in part on the amount of TRPs in the TRP set and the total amount of spatial domain (SD) basis for the TRP set, the code point indicating the amount of SD basis selected by the UE for each TRP in the TRP set; and sending channel state information (CSI) signaling, the channel state information (CSI) signaling including an indication of the code point indicating the amount of SD basis for each TRP.

[0006] In another aspect, a method for wireless communication at a network entity is provided. The method includes: sending configuration information indicating resources for a TRP set to a UE; receiving CSI signaling from the UE, the CSI signaling including a code point associated with an amount of SD basis for each TRP in the TRP set; and determining the amount of SD basis for each TRP in the TRP set based at least in part on the amount of TRPs in the TRP set, the total amount of SD basis for the TRP set, and the code point.

[0007] Other aspects provide: an apparatus operable to, configured to, or otherwise adapted to perform any one or more of the foregoing methods and / or those described elsewhere herein; a non-transitory computer-readable medium comprising instructions that, when executed by a processor of the apparatus, cause the apparatus to perform the foregoing methods and those described elsewhere herein; a computer program product embodied on a computer-readable storage medium, the computer-readable storage medium comprising: code for performing the foregoing methods and those described elsewhere herein; and / or an apparatus comprising components for performing the foregoing methods and those described elsewhere herein. By way of example, an apparatus may include a processing system, a device having a processing system, or a processing system cooperating through one or more networks.

[0008] For purposes of illustration, the following detailed description and drawings set forth certain features. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings depict certain features of the various aspects described herein and should not be considered to limit the scope of the disclosure.

[0010] Figure 1 An example wireless communication network is depicted.

[0011] Figure 2 An example disaggregated base station architecture is depicted.

[0012] Figure 3 Aspects of an example base station and example user equipment are depicted.

[0013] Figure 4A , Figure 4B , Figure 4C and Figure 4D Various example aspects of data structures for a wireless communication network are described.

[0014] Figure 5 A conceptual example of a pre-decoder matrix is ​​depicted.

[0015] Figure 6 is a block diagram depicting an example of codebook based channel state feedback (CSF).

[0016] Figure 7 An example transmitter receiver point (TRP) scenario is depicted.

[0017] Figures 8 to 9 A conceptual example of a pre-decoder matrix is ​​depicted.

[0018] Fig.10 Various coherent joint transmission (CJT) and non-coherent joint transmission (NCJT) scenarios are depicted.

[0019] Fig.11 Depicted is an example block diagram of uplink control information (UCI) signaling.

[0020] Fig.12 A block diagram of UCI signaling is depicted.

[0021] Fig.13 A block diagram of CSI signaling is depicted.

[0022] Fig.14 A block diagram of CSI signaling is depicted.

[0023] Fig.15 A block diagram of CSI signaling is depicted.

[0024] Fig.16 A method for wireless communication is described.

[0025] Fig.17 A method for wireless communication is described.

[0026] Fig.18 Aspects of an example communications device are depicted.

[0027] Fig.19 Aspects of an example communications device are depicted. DETAILED DESCRIPTION

[0028] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for reporting a number of spatial domain bases for a plurality of transmit-receive points (TRPs).

[0029] The user equipment (UE) may acquire channel state information (CSI) during the process of channel estimation. Various enhancements to CSI acquisition in certain scenarios are being considered, such as coherent joint transmission (CJT) targeting certain frequency ranges (e.g., FR1) and multiple TRPs (e.g., up to 4 TRPs). Certain assumptions may be made in such cases, such as ideal backhaul and synchronization and the same number of antenna ports across TRPs.

[0030] Motivations for enhanced CSI for CJT scenarios may include enabling a larger number of ports for lower frequency bands (e.g., FR1) using distributed TRPs (which may also be referred to as panels). For a single TRP or panel with, for example, 32 ports, the antenna array size would be too large for practical deployment. In the case of the introduction of CJT mTRPs, and in the case of an increase in the number or amount of TRPs (e.g., from 2 TRPs to 4 TRPs), it may be desirable to limit the signaling and processing overhead that would otherwise increase with the increase in the number of TRPs.

[0031] According to some techniques, for example in the context of Type II codebook refinement for CJT mTRP, multiple SD basis parameters (L n ). The UE may be configured with one or more CSI-RS resource sets, and the parameter L n Applicable to each CSI-RS. According to some techniques, L n The value of L may be configured by a network entity (such as a gNB) for each TRP in the set of TRPs to be used for communication with the UE. However, the network configuration may result in a different TRP than the UE has for L. n For example, the network entity may send a request to the UE for the total number of SD bases (L or L) across all TRPs. tot ) and the UE can determine the L for each TRP based on the value of L n However, although the UE knows the L used for TRP n What is the value of L? n So that the base station can communicate with the UE properly via TRP.

[0032] The UE may receive a configuration of resources of the UE for a TRP set (e.g., mTRP) from a network entity (e.g., gNB). The UE may then configure the resources of the UE for a TRP set (e.g., mTRP) based at least in part on the number of TRPs in the TRP set (e.g., N) and the total amount of SD bases for the TRP set (e.g., L). tot ) to select a code point from the set of code points. The code point may indicate to the network entity the amount of SD basis (e.g., L) selected by the UE for each TRP in the set of TRPs. n ). For example, the UE may select L for TRP n One or more or all of the values ​​of . The UE may then send CSI signaling including an indication of a code point indicating the amount of SD basis used for each TRP.

[0033] The CSI signaling may include two or more parts, the two or more parts including a first CSI part and a second CSI part. In some examples, the code point may be communicated in the first CSI part. In some examples, the code point may be communicated in the second CSI part. The UE may determine an SD-based cumulative amount corresponding to the TRP set and determine the code point based on the SD-based cumulative amount.

[0034] The described techniques may result in higher or increased throughput in communications between a UE and a network entity via a TRP. For example, the UE may be able to better select an SD basis, in part because the UE may understand the operating conditions of the UE better than the network entity that would otherwise select the value of the SD basis. CSI reporting overhead may also be reduced by using code points that require fewer bits than other techniques, and may result in more efficient use of the wireless medium and reduced processing time and power of the UE.

[0035] Introduction to wireless communication networks

[0036] The techniques and methods described herein can be used in various wireless communication networks. Although various aspects may be described herein using terms commonly associated with 3G, 4G and / or 5G wireless technologies, various aspects of the present disclosure may also be applicable to other communication systems and standards not explicitly mentioned herein.

[0037] Figure 1 An example of a wireless communication network 100 is depicted in which various aspects described herein may be implemented.

[0038] In general, the wireless communication network 100 includes various network entities (alternatively, network elements or network nodes). A network entity is typically a communication device and / or a communication function performed by a communication device (e.g., user equipment (UE), base station (BS), component of a BS, server, etc.). For example, various functions of a network and various devices associated with and interacting with the network may be considered network entities. In addition, the wireless communication network 100 includes ground aspects, such as ground-based network entities (e.g., BS 102), and non-ground aspects, such as satellites 140 and aircraft 145, which may include airborne network entities (e.g., one or more BSs) capable of communicating with other network elements (e.g., ground BSs) and user equipment.

[0039] In the depicted example, the wireless communication network 100 includes a BS 102, a UE 104, and one or more core networks (such as an evolved packet core (EPC) 160 and a 5G core (5GC) network 190) that interoperate to provide communication services over various communication links (including wired and wireless links).

[0040] Figure 1Various example UEs 104 are depicted, which may more generally include: a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player, a camera, a game console, a tablet computer, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, an Internet of Things (IoT) device, an Always-On (AON) device, an edge processing device, or other similar devices. UE 104 may also be more generally referred to as a mobile device, a wireless device, a wireless communication device, a station, a mobile station, a subscriber station, a mobile subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a remote device, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, and others.

[0041] BS 102 wirelessly communicates with (e.g., transmits signals to or receives signals from) UE 104 via communication link 120. Communication link 120 between BS 102 and UE 104 may include uplink (UL) (also referred to as a reverse link) transmissions from UE 104 to BS 102 and / or downlink (DL) (also referred to as a forward link) transmissions from BS 102 to UE 104. In various aspects, communication link 120 may employ multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity.

[0042] BS 102 may generally include: NodeB, enhanced NodeB (eNB), next generation enhanced NodeB (ng-eNB), next generation NodeB (gNB or gNodeB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, transmission and reception point, and / or other. Each of BS 102 may provide communication coverage for a corresponding geographic coverage area 110, which may sometimes be referred to as a cell, and may overlap in some cases (e.g., a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of a macro cell). For example, a BS may provide communication coverage for a macro cell (covering a relatively large geographic area), a pico cell (covering a relatively small geographic area, such as a stadium), a femto cell (relatively small geographic area (e.g., a home)), and / or other types of cells.

[0043] Although BS102 is depicted as a single communication device in various aspects, BS102 can be implemented in various configurations. For example, one or more components of the base station may be decomposed, including a central unit (CU), one or more distributed units (DU), one or more radio units (RU), a near real-time (near RT) RAN intelligent controller (RIC) or a non-real-time (non-RT) RIC, to name a few examples. In another example, various aspects of the base station may be virtualized. More generally, a base station (e.g., BS102) may include components located at a single physical location or components located at various physical locations. In an example in which the base station includes components located at various physical locations, the various components may each perform a function so that the various components together implement functions similar to those of a base station located at a single physical location. In some aspects, a base station including components located at various physical locations may be referred to as a decomposed radio access network architecture (such as an open RAN (O-RAN) or virtualized RAN (VRAN) architecture). Figure 2 An example decomposed base station architecture is depicted and described.

[0044] Different BSs 102 within the wireless communication network 100 may also be configured to support different radio access technologies, such as 3G, 4G, and / or 5G. For example, a BS 102 configured for 4G Long Term Evolution (LTE) (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). A BS 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) may interface with the 5GC 190 via a second backhaul link 184. The BSs 102 may communicate with each other directly or indirectly (e.g., via the EPC 160 or the 5GC 190) over a third backhaul link 134 (e.g., an X2 interface), which may be wired or wireless.

[0045] The wireless communication network 100 may subdivide the electromagnetic spectrum into various categories, frequency bands, channels, or other characteristics. In some aspects, the subdivision is provided based on wavelength and frequency, where frequency may also be referred to as a carrier, subcarrier, channel, tone, or subband. For example, 3GPP currently defines frequency range 1 (FR1) as including 410 MHz-7125 MHz, which is often (interchangeably) referred to as "below 6 GHz". Similarly, 3GPP currently defines frequency range 2 (FR2) as including 24,250 MHz-52,600 MHz, which is sometimes (interchangeably) referred to as "millimeter wave" ("mmW" or "mmWave"). A base station (e.g., a mmWave base station such as BS180) configured to communicate using mmWave / near mmWave radio bands may utilize beamforming (e.g., 182) with a UE (e.g., 104) to improve path loss and range.

[0046] The communication link 120 between the BS 102 and, for example, the UE 104 may be through one or more carriers, which may have different bandwidths (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, and / or other MHz) and may be aggregated in various aspects. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL).

[0047] Communications using higher frequency bands may have higher path loss and shorter range than communications at lower frequencies. Figure 1 180) may utilize beamforming 182 with UE 104 to improve path loss and range. For example, BS 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming. In some cases, BS 180 may send beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from BS 180 in one or more receive directions 182". UE 104 may also send beamformed signals to BS 180 in one or more transmit directions 182". BS 180 may also receive beamformed signals from UE 104 in one or more receive directions 182'. BS 180 and UE 104 may then perform beam training to determine the best receive direction and transmit direction for each of BS 180 and UE 104. It is noteworthy that the transmit direction and receive direction of BS 180 may be the same or may not be the same. Similarly, the transmit direction and receive direction of UE 104 may or may not be the same.

[0048] Wireless communication network 100 also includes Wi-Fi AP 150 that communicates with Wi-Fi station (STA) 152 via communication link 154 in, for example, the 2.4 GHz and / or 5 GHz unlicensed spectrum.

[0049] Certain UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), and / or a physical sidelink feedback channel (PSFCH).

[0050] The EPC 160 may include various functional components, including: a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and / or a packet data network (PDN) gateway 172, such as in the depicted example. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management.

[0051] Generally, user Internet Protocol (IP) packets are delivered through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176, which may include, for example, the Internet, an Intranet, an IP Multimedia Subsystem (IMS), a Packet Switched (PS) streaming media service, and / or other IP services.

[0052] The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS delivery, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and / or may be used to schedule MBMS delivery. The MBMS Gateway 168 may be used to distribute MBMS services to BSs 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting a specific service, and / or may be responsible for session management (start / stop) and for collecting eMBMS related charging information.

[0053] 5GC 190 may include various functional components, including: access and mobility management function (AMF) 192, other AMFs 193, session management function (SMF) 194, and user plane function (UPF) 195. AMF 192 may communicate with unified data management (UDM) 196.

[0054] AMF 192 is a control node that handles signaling between UE 104 and 5GC 190. AMF 192 provides, for example, Quality of Service (QoS) flow and session management.

[0055] Internet Protocol (IP) packets are delivered through UPF 195, which is connected to IP Services 197 and provides IP address allocation for UEs and other functions for 5GC 190. IP Services 197 may include, for example, the Internet, Intranet, IMS, PS streaming services, and / or other IP services.

[0056] In various aspects, a network entity or network node may be implemented as a converged base station, a decomposed base station, a component of a base station, an integrated access and backhaul (IAB) node, a relay node, a sidelink node, to name a few examples.

[0057] Figure 2 An example disaggregated base station 200 architecture is depicted. The disaggregated base station 200 architecture may include one or more central units (CUs) 210 that may communicate directly with a core network 220 via a backhaul link, or indirectly with the core network 220 through one or more disaggregated base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 225 via an E2 link, or a non-real-time (non-RT) RIC 215 associated with a service management and orchestration (SMO) framework 205, or both. The CU 210 may communicate with one or more distributed units (DUs) 230 via respective midhaul links, such as an F1 interface. The DU 230 may communicate with one or more radio units (RUs) 240 via respective fronthaul links. The RU 240 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 240.

[0058] Each of the units (e.g., CU 210, DU 230, RU 240, and near-RT RIC 225, non-RT RIC 215, and SMO framework 205) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interface of the unit may be configured to communicate with one or more of the other units via a transmission medium. For example, the units may include a wired interface configured to receive or send signals to one or more of the other units via a wired transmission medium. Additionally or alternatively, the unit may include a wireless interface that may include a receiver, transmitter, or transceiver (such as a radio frequency (RF) transceiver) configured to receive signals on a wireless transmission medium or send signals to one or more of the other units, or both.

[0059] In some aspects, CU 210 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), or service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface configured to communicate signals with other control functions hosted by CU 210. CU210 may be configured to handle user plane functions (e.g., central unit-user plane (CU-UP)), control plane functions (e.g., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 210 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 210 may be implemented to communicate with DU 230 for network control and signaling.

[0060] DU 230 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 240. In some aspects, DU 230 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on functional splits such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 230 may further host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 230 or with control functions hosted by CU 210.

[0061] The lower layer functionality may be implemented by one or more RUs 240. In some deployments, a RU 240 controlled by a DU 230 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on a functional split (such as a lower layer functional split). In such an architecture, the RU 240 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 240 may be controlled by the corresponding DU 230. In some scenarios, this configuration may enable the implementation of the DU 230 and the CU 210 in a cloud-based RAN architecture (such as a vRAN architecture).

[0062] The SMO framework 205 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 205 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 210, DU 230, RU 240, and near-RT RIC 225. In some specific implementations, the SMO framework 205 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 211) via the O1 interface. In addition, in some specific implementations, the SMO framework 205 may communicate directly with one or more RUs 240 via the O1 interface. The SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of the SMO framework 205 .

[0063] The non-RT RIC 215 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 225. The non-RT RIC 215 may be coupled to or in communication with the near-RT RIC 225 (such as via an A1 interface). The near-RT RIC 225 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 210, one or more DUs 230, or both, and the O-eNB with the near-RT RIC 225.

[0064] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 225 and may be received from a non-network data source or from a network function at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 205 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0065] Figure 3 Aspects of an example BS 102 and UE 104 are depicted.

[0066] In general, BS 102 includes various processors (e.g., 320, 330, 338, and 340), antennas 334a-334t (collectively 334), transceivers 332a-332t (collectively 332) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., data source 312) and wireless reception of data (e.g., data sink 339). For example, BS 102 can transmit and receive data between BS 102 and UE 104. BS 102 includes a controller / processor 340 that can be configured to implement various functions described herein related to wireless communication.

[0067] Generally speaking, the UE 104 includes various processors (e.g., 358, 364, 366, and 380), antennas 352a-352r (collectively 352), transceivers 354a-354r (collectively 354) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., retrieved from a data source 362) and wireless reception of data (e.g., provided to a data sink 360). The UE 104 includes a controller / processor 380 that can be configured to implement various functions described herein related to wireless communications.

[0068] Regarding example downlink transmissions, BS 102 includes a transmit processor 320 that can receive data from a data source 312 and control information from a controller / processor 340. The control information can be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), and / or others. In some examples, the data can be for a physical downlink shared channel (PDSCH).

[0069] The transmit processor 320 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 320 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH demodulation reference signal (DMRS), and a channel state information reference signal (CSI-RS)).

[0070] The transmit (TX) multiple-input multiple-output (MIMO) processor 330 may perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to a modulator (MOD) in a transceiver 332a-332t. Each modulator in the transceiver 332a-332t may process a corresponding output symbol stream to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from the modulators in the transceivers 332a-332t may be transmitted via antennas 334a-334t, respectively.

[0071] To receive downlink transmissions, UE 104 includes antennas 352a-352r that can receive downlink signals from BS 102 and can provide received signals to demodulators (DEMODs) in transceivers 354a-354r, respectively. Each demodulator in transceivers 354a-354r can condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator can further process the input samples to obtain received symbols.

[0072] A MIMO detector 356 may obtain received symbols from all demodulators in transceivers 354a-354r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 358 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 104 to a data sink 360, and provide decoded control information to a controller / processor 380.

[0073] With respect to example uplink transmissions, the UE 104 also includes a transmit processor 364 that may receive and process data from a data source 362 (e.g., for a PUSCH) and control information from a controller / processor 380 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 364 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 364 may be pre-decoded by a TX MIMO processor 366, if applicable, further processed by a modulator in the transceivers 354a-354r (e.g., for SC-FDM), and transmitted to the BS 102.

[0074] At BS 102, uplink signals from UE 104 may be received by antennas 334 a-334 t, processed by demodulators in transceivers 332 a-332 t, detected by MIMO detector 336 if applicable, and further processed by receive processor 338 to obtain decoded data and control information transmitted by UE 104. Receive processor 338 may provide decoded data to data sink 339 and decoded control information to controller / processor 340.

[0075] Memory 342 and memory 382 may store data and program codes for BS 102 and UE 104, respectively.

[0076] The scheduler 344 may schedule UEs for data transmission on the downlink and / or uplink.

[0077] In various aspects, BS 102 may be described as sending and receiving various types of data associated with the methods described herein. In these contexts, "sending" may refer to various mechanisms for outputting data, such as outputting data from a data source 312, a scheduler 344, a memory 342, a transmit processor 320, a controller / processor 340, a TX MIMO processor 330, a transceiver 332a-332t, an antenna 334a-334t, and / or other aspects described herein. Similarly, "receiving" may refer to various mechanisms for obtaining data, such as obtaining data from an antenna 334a-334t, a transceiver 332a-332t, a RX MIMO detector 336, a controller / processor 340, a receive processor 338, a scheduler 344, a memory 342, and / or other aspects described herein.

[0078] In various aspects, the UE 104 may also be described as sending and receiving various types of data associated with the methods described herein. In these contexts, "sending" may refer to various mechanisms for outputting data, such as outputting data from a data source 362, a memory 382, ​​a transmit processor 364, a controller / processor 380, a TX MIMO processor 366, a transceiver 354a-354t, an antenna 352a-352t, and / or other aspects described herein. Similarly, "receiving" may refer to various mechanisms for obtaining data, such as obtaining data from an antenna 352a-352t, a transceiver 354a-354t, a RX MIMO detector 356, a controller / processor 380, a receive processor 358, a memory 382, ​​and / or other aspects described herein.

[0079] In some aspects, the processor may be configured to perform various operations (such as those associated with the methods described herein) and send (output) data to or receive (obtain) data from another interface configured to send or receive data, respectively.

[0080] Figure 4A , Figure 4B , Figure 4C and Figure 4D Describes a method for use in a wireless communication network such as Figure 1 Various aspects of the data structure of the wireless communication network 100).

[0081] Specifically, Figure 4A is a diagram 400 illustrating an example of a first subframe within a 5G (e.g., 5G NR) frame structure, Figure 4B is a diagram 430 illustrating an example of a DL channel within a 5G subframe, Figure 4C is a diagram 450 illustrating an example of a second subframe within a 5G frame structure, and Figure 4DFIG480 is a diagram illustrating an example of UL channels within a 5G subframe.

[0082] Wireless communication systems may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. Such systems may also support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) will (for example, Figure 4B and Figure 4D The system bandwidth (as depicted in FIG. 1 ) is divided into multiple orthogonal subcarriers. Each subcarrier can be modulated with data. Modulation symbols can be transmitted in the frequency domain using OFDM and / or in the time domain using SC-FDM.

[0083] The wireless communication frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers, subframes within the set of subcarriers are dedicated to either DL or UL. The wireless communication frame structure may also be time division duplex (TDD), where for a particular set of subcarriers, subframes within the set of subcarriers are dedicated to both DL and UL.

[0084] exist Figure 4A and Figure 4C In the wireless communication frame structure, TDD is used, where D is DL, U is UL, and X is used flexibly between DL / UL. The UE can be configured with a time slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received time slot format indicator (SFI). In the depicted example, the 10ms frame is divided into 10 equally sized 1ms subframes. Each subframe may include one or more time slots. In some examples, each time slot may include 7 or 14 symbols, depending on the time slot format. The subframe may also include micro-time slots, which typically have fewer symbols than the entire time slot. Other wireless communication technologies may have different frame structures and / or different channels.

[0085] In certain aspects, the number of slots within a subframe is based on the slot configuration and parameter set. For example, for slot configuration 0, different parameter sets (μ) 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different parameter sets 0 to 2 allow for 2, 4, and 8 slots per subframe, respectively. Thus, for slot configuration 0 and parameter set μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing and symbol length / duration are a function of the parameter set. The subcarrier spacing may be equal to 2 μ × 15kHz, where μ is parameter set 0 to 5. Thus, parameter set μ=0 has a subcarrier spacing of 15kHz, and parameter set μ=5 has a subcarrier spacing of 480kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figure 4A , Figure 4B , Figure 4C and Figure 4D An example is provided for slot configuration 0 with 14 symbols per slot and parameter set μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

[0086] like Figure 4A , Figure 4B , Figure 4C and Figure 4D As depicted in , a resource grid can be used to represent a frame structure. Each time slot includes a resource block (RB) (also called a physical RB (PRB)) extending, for example, 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0087] like Figure 4A As illustrated in FIG. , some of the REs carry data for UEs (eg, Figure 1 and Figure 3 The RS may include a demodulation RS (DMRS) and / or a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and / or a phase tracking RS (PT-RS).

[0088] Figure 4B Examples of various DL channels within a subframe of a frame are illustrated.The Physical Downlink Control Channel (PDCCH) carries DCI within one or more Control Channel Elements (CCEs), each CCE comprising, for example, nine RE Groups (REGs), each REG comprising, for example, four consecutive REs in an OFDM symbol.

[0089] The primary synchronization signal (PSS) may be in symbol 2 of a particular subframe of a frame. The PSS is transmitted by a UE (e.g., Figure 1 and Figure 3 104) is used to determine subframe / symbol timing and physical layer identification.

[0090] The Secondary Synchronization Signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing.

[0091] Based on the physical layer identifier and the physical layer cell identifier group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DMRS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block. The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information (such as system information blocks (SIBs)) that is not sent via the PBCH, and / or paging messages.

[0092] like Figure 4C As illustrated in , some of the REs carry DMRS for channel estimation at the base station (indicated as R for a specific configuration, but other DMRS configurations are possible). The UE may send a DMRS for the PUCCH and a DMRS for the PUSCH. The PUSCH DMRS may be sent, for example, in the first one or two symbols of the PUSCH. The PUCCH DMRS may be sent in different configurations depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used. UE104 may send a sounding reference signal (SRS). The SRS may be sent, for example, in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0093] Figure 4D Examples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0094] Example CSI Report Configuration

[0095] Channel state information (CSI) may refer to channel properties of a communication link. CSI may represent, for example, the combined effects of scattering, fading, and power attenuation with the distance between the transmitter and the receiver. Channel estimation using a pilot, such as a CSI reference signal (CSI-RS), may be performed to determine these effects on the channel. CSI may be used to adapt transmissions based on current channel conditions, which is useful for achieving reliable communications, especially with high data rates, in multi-antenna systems. CSI is typically measured at the receiver, quantized, and fed back to the transmitter.

[0096] The time and frequency resources that may be used by a user equipment (UE) to report CSI are controlled by a base station (BS) (e.g., a gNB). The CSI may include a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a SS / PBCH block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), and / or L1-RSRP. However, as described below, additional information or other information may be included in the report.

[0097] The UE may be configured by the BS for CSI reporting. The BS may configure the UE for CSI reporting. For example, the BS configures the UE with a CSI reporting configuration or multiple CSI reporting configurations. The CSI reporting configuration may be provided to the UE via higher layer signaling such as radio resource control (RRC) signaling (e.g., CSI-ReportConfig). The CSI reporting configuration may be associated with a CSI-RS resource for channel measurement (CM), interference measurement (IM), or both. The CSI reporting configuration configures the CSI-RS resources (e.g., CSI-ResourceConfig) used for measurement. The CSI-RS resources provide the UE with a configuration of a CSI-RS port or a CSI-RS port group mapped to time and frequency resources (e.g., resource elements (REs)). The CSI-RS resources may be zero power (ZP) or non-zero power (NZP) resources. At least one NZP CSI-RS resource may be configured for CM.

[0098] For type II codebook, the PMI is a linear combination of beams; it has a subset of orthogonal beams to be used for linear combination, and has amplitude and phase per layer, per polarization for each beam. For any type of PMI, there can be a wideband (WB) PMI and / or a subband (SB) PMI as configured.

[0099] The CSI reporting configuration may configure the UE for aperiodic, periodic, or semi-persistent CSI reporting. For periodic CSI, the UE may be configured with periodic CSI-RS resources. Periodic CSI on the physical uplink control channel (PUCCH) may be triggered via RRC. Semi-persistent CSI reporting on the physical uplink control channel (PUCCH) may be activated via a medium access control (MAC) control element (CE). For aperiodic and semi-persistent CSI on the physical uplink shared channel (PUSCH), the BS may signal a CSI report trigger to the UE, which indicates that the UE transmits a CSI report for one or more CSI-RS resources, or configures a CSI-RS RS report trigger state (e.g., CSI-AperiodicTriggerStateList and CSI-SemiPersistentOnPUSCH-TriggerStateList). CSI report triggers for aperiodic CSI and semi-persistent CSI on PUSCH may be provided via downlink control information (DCI).

[0100] The UE may report CSI feedback (CSF) based on the CSI reporting configuration and the CSI reporting trigger. For example, the UE may measure the channel on which the triggered CSI-RS resource (associated with the CSI reporting configuration) is transmitted. Based on these measurements, the UE may select a preferred CSI-RS resource. The UE reports the CSF for the selected CSI-RS resource. The LI can be calculated conditional on the reported CQI, PMI, RI, and CRI; the CQI can be calculated conditional on the reported PMI, RI, and CRI; the PMI can be calculated conditional on the reported RI and CRI; and the RI can be calculated conditional on the reported CRI.

[0101] Each CSI reporting configuration may be associated with a single downlink (DL) bandwidth part (BWP). A CSI reporting setting configuration may define a CSI reporting band as a subset of a subband of a BWP. The associated DL BWP may be indicated by a higher layer parameter (e.g., bwp-Id) in a CSI reporting configuration for channel measurement and contains parameters for one CSI reporting band, such as codebook configuration, time domain behavior, frequency granularity of CSI, measurement restriction configuration, and CSI-related quantities to be reported by the UE. Each CSI resource setting may be located in a DL BWP identified by a higher layer parameter, and all CSI resource settings may be linked to a CSI reporting setting with the same DL BWP.

[0102] In some systems, the UE may be configured via higher layer signaling (e.g., in the CSI reporting configuration) with one of two possible subband sizes (e.g., reportFreqConfiguration included in CSI-ReportConfig), which indicates the frequency granularity of the CSI report, where a subband may be defined as The UE may further receive an indication of the subbands for which CSI feedback is requested. In some examples, a subband mask is configured for the requested subbands for CSI reporting. The UE calculates a predecoder for each requested subband and finds a PMI that matches the calculated predecoder on each of these subbands.

[0103] Compressed CSI feedback coefficient report

[0104] As discussed above, a user equipment (UE) may be configured for channel state information (CSI) reporting, for example, by receiving a CSI configuration message from a base station. In some systems, the UE may be configured to report at least a type II precoder across configured frequency domain (FD) units. For example, the precoder matrix W for layer r is r Includes the use of spatial compression to report W for a subset of selected beams 1 The matrix and the FD elements across the configuration report (for cross-polarization) the linear combination coefficients W for the selected beam (2L) 2,r matrix:

[0105] in

[0106] where b i is the selected beam, c i is the set of linear combination coefficients (i.e., W 2,r matrix), L is the number of selected spatial beams, and N 3 Corresponds to the number of frequency units (e.g., subbands, resource blocks (RBs), etc.). In some configurations, L is RRC configured. The pre-decoder is based on a linear combination of digital Fourier transform (DFT) beams. Type II codebooks can improve MU-MIMO performance. In some configurations where two polarizations are considered, W 2,r The matrix has size 2L x N 3 , W 2,r Matrix 510 is W for layer 0 2,r Matrix and W 2,r Matrix 540 is W for layer 1 2,r matrix.

[0107] Figure 5A conceptual example 500 of a pre-decoder matrix is ​​depicted. In some systems, the UE may be configured to report FD compressed pre-decoder feedback to reduce the overhead of CSI reporting. As shown in the conceptual example 500, the pre-decoder matrix (W) for layer i (where i=0,1) 2,i ) can use FD compression Predecoder Matrix The matrix size is compressed to 2L × M (where M is configured and communicated by the network via RRC or DCI in the CSI configuration message, and M <N 3 ), is given as:

[0108]

[0109] The pre-decoder matrix W i (not shown) with P = 2N 1 N 2 row (spatial domain, number of ports) and N 3 A column (a frequency domain compression unit containing an RB or reporting subband) is selected, and wherein the M basis is selected independently for each of layer 0 and layer 1.

[0110] Matrix 520 includes linear combination coefficients (amplitude and phase), where each element represents the coefficient of the tap for the beam. Matrix 520 is defined by size 2L x M, where a row corresponds to a W of size P x ​​2L (where L is network configured via RRC) 1 (not shown), and one entry therein represents a coefficient for one tap of the spatial beam. The UE may be configured to report (e.g., CSI report) The subset K of the linear combination coefficients of the matrix 520 0 <2LM. For example, the UE may report K illustrated as a shaded square NZ,i <K 0 coefficients (K NZ,i corresponds to the maximum number of non-zero coefficients for layer i (where i=0 or 1), and K 0 is network configured via RRC) (unreported coefficients are set to zero). In some configurations, The entries in matrix 520 correspond to The rows of matrix 530. In the example shown, at layer 0 Matrix 520 and at layer 1 Matrix 550 is both 2L XM.

[0111] Matrix 530 consists of basis vectors (each row is a basis vector) for performing compression in the frequency domain. In the example shown, Matrix 530 and at layer 1 Matrix 560 includes both 3 There are M=4 FD bases (illustrated as shaded rows) for candidate DFT bases. In some configurations, the UE may report the A subset of a selected basis of a matrix. Specifically, M bases are selected at layer 0 and layer 1. That is, the M bases selected at layer 0 may be the same / partially overlapped / non-overlapped with the M bases selected at layer 1.

[0112] Overview of CSF based on UE PMI codebook

[0113] A PMI codebook generally refers to a dictionary of PMI entries. In this way, using the PMI codebook, each PMI component from a predefined set can be mapped to a bit sequence reported by the UE. Then, a base station receiving the bit sequence (as a CSF) can obtain the corresponding PMI from the reported bit sequence.

[0114] How the UE calculates the PMI may be left to the UE implementation. However, how the UE reports the PMI should follow the format defined in the codebook, so that the UE and the base station each know how to map the PMI components to the reported bit sequence.

[0115] Figure 6 6 is a block diagram illustrating an example of a codebook-based CSF. As illustrated, the UE may first perform channel estimation based on the CSI-RS (at 602) to estimate the channel H. The CSI calculation block 604 may generate a bit sequence a. As illustrated, the bit sequence a may be generated to find a PMI component from a predefined PMI codebook for the radio channel H or the pre-decoder W (at block 606), and the PMI component is mapped to the bit sequence a via block 608. This mapping from a set of predefined PMI components essentially acts as a form of quantization. The UE sends the bit sequence a to the BS (e.g., in a CSI report) via block 610.

[0116] like Figure 6 As illustrated in , at the BS side, the BS receives a bit sequence a reported by the UE. The BS then follows the codebook to obtain each PMI component using the reported bit sequence a, and reconstructs the actual PMI using each PMI component (obtained from the codebook) at block 612 to recover the radio channel H or pre-decoder W.

[0117] Figure 7Various scenarios 700 for CJT are shown. These scenarios are referred to as: Scenario 1A, where co-located TRPs / panels (intra-site) have the same orientation; and Scenario 1B, where panels have different orientations (inter-sector). Another scenario (Scenario 2) may involve distributed TRPs (inter-site).

[0118] Figure 8 An example 800 of an enhanced Type II (eType-II) CSI is shown, where for each layer, across multiple N 3 The pre-decoder of (PMI) sub-band is N t ×N 3 matrix:

[0119]

[0120] Where SD is based on W 1 (DFT basis) is N t ×2L matrix, W 1 It is shared by all layers, N t =2N 1 O 1 N 2 O 2 (Number of Tx antennas - O 1 and O 2 Oversampling) is RRC configured, L = {2, 4, 6} (number of beams) is RRC configured, FD basis W f (DFT basis) is M×N 3 Matrix, W f is layer-specific, and M (the number of FD bases) is rank-pair specific, i.e., for rank = {1, 2}, M 1 =M 2 , and for rank = {3,4}, M 3 =M 4 , M 1 or M 3 It is configured by RRC. Coefficient matrix is a 2L×M matrix and is layer specific. For each layer, the UE may report up to K 0 non-zero coefficients, among which K 0 It is RRC configured. Across all layers, the UE can report up to 2K 0 non-zero coefficients, where unreported coefficients may be set to zero.

[0121] Fig. 9 An example scenario 900 of spatial division multiplexed (SDM-based) NCJT is shown, where data is pre-coded separately on different TRPs. Fig. 9An example of CJT is also shown, where the data is pre-decoded in a fully joint manner. According to one option, the data can be pre-decoded using a separate pre-decoder with co-phase and amplitude coefficients. It is also possible that the co-phase / co-amplitude is implicitly accommodated in the pre-decoder (so the equations can appear indistinguishable from the NCJT case). Port diagrams for NCJT, the first option of CJT, and the second option of CJT are also illustrated as Fig.10 Example scene 1000 in .

[0122] Aspects related to reporting the number of SD bases for multiple TRPs

[0123] According to some techniques, for example in the context of Type II codebook refinement for CJT mTRP, multiple SD basis parameters (L n ). The UE may be configured with one or more CSI-RS resource sets, and the parameter L n Applicable to each CSI-RS. According to some techniques, L n The value of L may be configured by a network entity (such as a gNB) for each TRP in the set of TRPs to be used for communication with the UE. However, the network configuration may result in a different TRP than the UE has for L. n Thus, as further described herein, the UE may select (determine, calculate, identify) L for TRP. n This may result in higher throughput in communications between the UE and the network entity via TRP. In some cases, the UE may select one or more or all of the values ​​of L than would otherwise be selected. n The network entity with the value of L can better understand the operating conditions of the UE. In some examples, the network entity can send a total number of SD bases (L or L) across all TRPs to the UE. tot ) and the UE can determine the L for each TRP based on the value of L n However, although the UE knows the L used for TRP n What is the value of L? n So that the base station can communicate with the UE properly via TRP.

[0124] In addition, convey the L for TRP n Some mechanisms for the value of may use an inefficient amount of bits, thereby increasing communication overhead, for example by increasing the size of the CSI report message. For example, one approach could be to use The ones digit indicates L n For each value of, such as for N TRPs. In one example, where Ltot=8 and N=4 TRPs, for L n All values ​​of According to another example, where Ltot=12 and N=4 TRPs, for L n All values ​​of Therefore, it is necessary to use L for TRP n An efficient technique for communicating the value of from the UE to the network entity.

[0125] According to some examples, the UE reports L for TRP n=1, ..., N n The joint indication of N values ​​that satisfies Where L tot Configured by a network entity (e.g., gNB) and sent to the UE. This joint indication has C(L tot -1,N-1) the total number of possible code point values ​​(from L tot -1 select N-1). By using such a method, it is possible to communicate L for TRP n The UE selects a value that uses a smaller number of bits in the UCI (e.g., CSI signaling or reporting). tot -1,N-1) code point values ​​represent the values ​​from all possible L tot -1 position selects N-1 positions ("split positions" or SD-based cumulants) {L acc (n) , n=n, ..., N-1}. Table 1 shows the split position coordinates L in the case of encoding (e.g., encoding by the UE for the UE to transmit the code point to the network entity) and in the case of decoding (e.g., decoding by the network entity). acc (n) (n=n, ..., N-1) and the number (amount) of SD bases L n The relationship between (n=1, ..., N):

[0126] coding decoding n＝1 <![CDATA[L acc (1) =L 1 -1]]> <![CDATA[L 1 =L acc (1) +1]]> n=2、...、N-1 <![CDATA[L acc (n) =L acc (n-1) +L n ]]> <![CDATA[L n =L acc (n) -L acc (n-1) ]]> n=N not applicable <![CDATA[L N =L tot -L acc (N-1) -1]]>

[0127] Table 1

[0128] In this example, the total number of bits required (E.g., it is the minimum number of bits that can be used.) In some examples, a larger number of bits can be used.

[0129] In some examples, in order to n Report (indicates the L for each TRP in the TRP set n ) for encoding, the UE may have the following as input parameters: N; L tot ; {L n , n = 1, ..., N such that The UE may store one or more accumulated amounts of the SD basis {L acc (n) , n=1, ..., N-1} as the intermediate input. The cumulative amount for the first TRP (n=1) can be L acc (1) =L 1 -1. The cumulative amount for the second TRP and subsequent TRPs (n=2, ..., N-1) may be L acc (n) =L acc (n-1) +L n The output (indicating the code point of Ln for the TRP set) can then be obtained by For example, two examples using the above encoding method may have the following indication values:

[0130]

[0131] Table 2

[0132] Specifically, the first row of Table 2 corresponds to Example 1, and the second row of Table 2 corresponds to Example 2, where the parameters are shown in Table 3 as follows:

[0133] N Ltot {Ln,n=1,2,3,4} {Lacc(n),n=1,2,3} Example 1 4 8 {2,3,2,1} {1,4,6} Example 2 4 12 {4,2,1,5} {3,5,6}

[0134] Table 3

[0135] For N = 4 and L tot =8, Table 4 depicts an example of using the above encoding method and the corresponding indication value:

[0136]

[0137]

[0138] Table 4

[0139] For N = 4 and L tot =12, Table 5 depicts an example of using the above encoding method and the corresponding indication value:

[0140]

[0141]

[0142]

[0143]

[0144]

[0145] Table 5

[0146] In some examples, in order to n Report (indicates the L for each TRP in the TRP set n ) for decoding, the network entity (e.g., gNB) may have the following as input parameters: N; L tot ; and indication (indicating the code point of Ln for the TRP set). As an intermediate output, the network entity may generate {Lacc(n), n=1, ..., N-1} using the following algorithmic process:

[0147] s 0 =0;

[0148] For n=1, ..., N-1

[0149] Find the maximum x in Table 5.2.2.2.5-4 * ∈{N-1-n,…,L tot -1-n}, so that

[0150] Instructions -s n-1 ≥C(x * ,Nn);

[0151] e n =C(x * ,Nn);

[0152] s n =s n-1 +e n ;

[0153]

[0154] According to the described algorithmic process, the outputs: Ln, n=1, ..., N can be used for L1=Lacc(1)+1, for Ln=Lacc(n)-Lacc(n-1), n=2, ..., N-1, and LN=Ltot-Lacc(N-1)-1.

[0155] Fig.11 An example diagram 1100 depicts location coordinates of SD bases. In some examples, diagram 1100 may support reporting the number of space domain bases for multiple transmission reception points. Diagram 1100 includes a first diagram 1101 and a second diagram 1102.

[0156] In the example of the first diagram 1101, where Ltot=8 and N=4 TRPs, C(L tot -1,N-1) code point values ​​represent the values ​​from all possible L tot-1 = 7 positions, select N-1 = 3 positions {L acc (n) , n=1,2,3} possible combinations. The position coordinates are 0,1,...,L tot -2=6, and for n=1, ..., N-1=3, the corresponding split positions can be L acc (n) =1, 4, 6. According to this example, the UE may need 6 bits to convey the L for TRP n In contrast, a larger number of bits (eg, 12) may be required according to other techniques.

[0157] In the example of the second diagram 1102, where Ltot=12 and N=4 TRPs, C(L tot -1,N-1) code point values ​​represent the values ​​from all possible L tot -1 = 11 positions, select N-1 = 3 positions {L acc (n) , n=1,2,3} possible combinations. The position coordinates are 0,1,...,L tot -2=10, and for n=1, ..., N-1=3, the corresponding split positions can be L acc (n) =3, 5, 6. According to this example, the UE may need 8 bits to convey the L for TRP n In contrast, a larger number of bits (eg, 16) may be required according to other techniques.

[0158] Fig.12 Depicted is a block diagram of uplink control information (UCI) signaling 1200. In some examples, UCI signaling 1200 may support reporting of the number of spatial domain bases for multiple transmission reception points.

[0159] In some examples, the UCI signaling 1200 may be CSI signaling (e.g., a CSI report or other channel state feedback (CSF)) and have multiple parts, such as a first UCI part 1201 (e.g., a first CSI part) and a second UCI part 1202 (e.g., a second CSI part). For example, the CSI signaling (which may also be referred to as a CSI report or a CSI message) may have a larger payload size. In some examples, the size of the payload may also vary, for example, depending on the communication configuration of the UE, the number of layers, the rank, the number of SD bases, the number of FD bases, etc. Thus, the UCI signaling 1200 may have a first UCI part 1201 and a second UCI part 1202, the first UCI part having a fixed payload size and the second UCI part having a variable payload size. In some examples, the first UCI part 1201 may have a smaller payload size than the second UCI part 1202. In some examples, the first UCI portion 1201 having a smaller payload size than the second UCI portion 1202 can be sent with higher reliability (e.g., using a smaller index modulation and coding scheme (MCS) or other coding type, or on time, frequency, and / or spatial resources associated with higher reliability communications).

[0160] In some examples, the first UCI portion 1201 may include a portion (bit or field) for conveying the RI 1205, the CQI 1210, and the number of non-zero coefficients (NZC) (NNZC) 1215. The NNZC 1215 may be used to indicate the total number of NZCs across all layers. And has log 2 2K 0 The network entity (e.g., gNB) receiving the UCI signaling 1200 may be able to determine the payload size of the second UCI part 1202 based on one or more characteristics of the first UCI part 1201. The payload size of the second UCI part 1202 may be based on the RI 1205, the CQI 1210, and / or the NNZC 1215. For example, a combination of the RI 1205 (transmission rank indicator or number of layers) and the NNZC 1215 may be mapped to a specific payload size, and the network entity may determine the size of the second UCI part 1202 based on these characteristics of the first UCI part 1201.

[0161] In some examples, the second UCI portion 1202 may include portions (bits or fields) for conveying SD beam selection 1220, FD beam selection 1225, strongest coefficient indication (SCI) 1230, coefficient selection bitmap 1235, and quantization of NZC 1240. SD beam selection 1220 may be used to indicate a total of N 1 N 2 O1 O 2 The number of beams in the i-th beam group is L, and has the following bit widths: 1，1 :log 2 O 1 O 2 , and i for beam indication 1,2 : FD beam selector 1225 can be used from N 3 Choose M for each layer in the basis RI FD basis, and has a value that depends on N 3 For N 3 ≤19, UE can use The ones digit only reports i 1,6,l , where l = 0, ... RI-1. For N 3 >19, the bit width can be a two-level choice based on the window. SCI 1230 can be used to indicate the location of the strongest coefficient and has a bit width that depends on RI. For RI=1, the bit width can be For RI>1, the bit width can be The coefficient selection bitmap 1235 for layers 0...RI-1 can be used to indicate the NZC The position and RI size within the 2LM bitmap has a bit width of 2LM×RI bits, and a total of 2LM×RI bits. The quantization of NZC 1240 can be used to indicate amplitude and / or phase quantization and has the following bit widths: 2,3,l : 4 bits, reference amplifier is weakly polarized, for i 2,4,l : bits, a differential amplifier for each coefficient except the strongest coefficient, and for i 2,5,l : bits, for the phase of each coefficient except the strongest coefficient.

[0162] The first UCI portion 1201 depicts RI 1205, CQI 1210, and NNZC 1215 in an order. In other examples, a different order consistent with the techniques described herein may be used. Similarly, the second UCI portion 1202 depicts SD beam selection 1220, FD beam selection 1225, SCI 1230, coefficient selection bitmap 1235, and quantization of NZC 1240 in an order. In other examples, a different order consistent with the techniques described herein may be used.

[0163] Fig.13 A block diagram of CSI signaling 1300 is depicted. In some examples, CSI signaling 1300 may support reporting of the number of spatial domain bases for multiple transmission reception points. In some examples, CSI signaling 1300 may be a specific example of UCI signaling.

[0164] In some examples, CSI signaling 1300 (e.g., a CSI report or other channel state feedback (CSF)) may have multiple parts, such as a first CSI part 1301 and a second CSI part 1302. The CSI signaling 1300 may have a first CSI part 1301 and a second CSI part 1302, the first UCI part having a fixed payload size and the second UCI part having a variable payload size. In some examples, the first CSI part 1301 may have a smaller payload size than the second CSI part 1302. In some examples, the first CSI part 1301 having a smaller payload size than the second CSI part 1302 may be sent with higher reliability (e.g., using a smaller index MCS or other coding type, or on a time, frequency, and / or spatial resource associated with a higher reliability communication).

[0165] In some examples, the first CSI portion 1301 may include portions (bits or fields) for conveying RI 1305, CQI 1310, and NNZC 1315 (which may be examples of RI 1205, CQI 1210, and NNZC 1215 described herein).

[0166] In some examples, the TRP selection bitmap 1320 may be an optional field of the first CSI part 1301. The TRP selection bitmap 1320 may have a size N TRP , that is, the number of TRPs that the UE is allowed to choose from, if the UE is allowed to make such a selection. TRP Select N∈{1,...,N TRP}, then this field exists. Alternatively, if the restricted configuration N=N TRP If the UE does not allow TRP selection by the network entity, this field is not present. In some examples, even if the optional TRP selection bitmap 1320 is omitted, L n Report 1325 may still be included in the first CSI part 1301 .

[0167] L n Report 1325 is a field of the first CSI portion 1301. In some examples, L n The bit size of the report 1325 can be based on N TRP (By N TRP determined) (e.g., as opposed to being based solely on N), e.g., as opposed to being based solely on The required bit size can be larger than that of Units; in some examples, when N=N TRP This larger number of bits can also be obtained when As discussed herein, the bit size of the first CSI portion 1301 may have a fixed size (e.g., predetermined and known to the UE and the network entity (e.g., gNB)), for example before the UE knows the reported N by decoding the TRP selection bitmap 1320.

[0168] In some examples, L n Report 1325 may have a fixed specific size. For some values ​​of N, only L may be used. n Report part 1325. In one example, when less than L is required n When reporting all bits of 1325, use L n The most significant bit (MSB) of 1325 is reported to convey N. In one example, when less than L is required n When reporting all bits of 1325, use L n The least significant bit (LSB) of 1325 is reported to convey N. In some examples, in addition to the L n Report 1325 transport to L n In addition to the MSB or LSB of the indication, you can also n Report 1325 adds padding (eg, zero padding).

[0169] In one example, L n The size of report 1325 can be 6 bits. For example, select Ltot=8 and N TRP =4 and N=3 TRPs. In this example, n Report 1325 The bit size field is reported Units digit.

[0170] In another example, L n The size of report 1325 can be 2 bits. For example, when Ltot=4 and N TRP =4 and N=N TRP =4 TRPs, then the UE may not have to report every value of Ln for a TRP. For example, because only L1=L2=L3=L4=1 is possible, and for example, in the case of selecting 3 TRPs or 2 TRPs, L n Report 1325 Reserved Bit size.

[0171] In addition, L n All zeros of report 1325 may be used to correspond to L indicating the TRP nFor example, if the UE selects N = 1 TRPs (single TRP (sTRP)), then L n The report 1325 may not need to indicate anything, but the size of the field may be greater than zero bits, for example so that the first CSI part 1301 may have a fixed size.

[0172] The second CSI portion 1302 may include at least an SD basis selection 1330, an indication of the SD basis selection for each TRP #1, ..., N, respectively. 2 O 1 O 2 SD basis set for each TRP#n=1, ..., N. In some examples, the bit size for each of TRP#n=1, ..., N can be In some examples, the second CSI portion 1302 may include one or more additional fields 1335 , such as FD beam selection 1225 , SCI 1230 , coefficient selection bitmap 1235 , and quantization of NZC 1240 , as described with reference to the second UCI portion 1202 .

[0173] In some examples, in L n Report L in Report 1325 n In the case of the first CSI part 1301, the first CSI part 1301 may support a specific number of TRPs (denoted as M) indicating the selected FD basis. v,n , where v represents the rank and n represents TRP#n). In this case, the network entity may configure a single M v value (sends an indication of the value to the UE), based on which the M of each TRP v,n With each L n For example, more beams (SD basis) may mean more delay paths (FD basis).

[0174] In one example, based on L n The maximum value of each TRP is determined by v,n For example, L n,max =max n∈{1,…,N} L n , then for TRP#n: or

[0175] In one example, based on L tot The value of M for each TRP is determined by v,n For example, for TRP#n: or

[0176] Fig.15A block diagram of CSI signaling 1500 is depicted. In some examples, CSI signaling 1500 may support reporting of the number of spatial domain bases for multiple transmission reception points. In some examples, CSI signaling 1500 may be a specific example of UCI signaling.

[0177] CSI signaling 1500 may have multiple parts, such as a first CSI part 1501. In some examples, the first CSI part 1501 may include RI 1305, CQI 1310, NNZC 1315, TRP selection bitmap 1320, and L as described herein with reference to CSI signaling 1300. n Report 1325. CSI signaling 1500 may also include a second CSI portion (not shown). In one example, the M of each TRP may be reported. v,n For example, CSI signaling 1500 may include M n Report 1505.

[0178] Fig.14 A block diagram of CSI signaling 1400 is depicted. In some examples, CSI signaling 1400 may support reporting of the number of spatial domain bases for multiple transmission reception points. In some examples, CSI signaling 1400 may be a specific example of UCI signaling.

[0179] CSI signaling 1400 may have multiple parts, such as a first CSI part 1401 and a second CSI part 1402. In some examples, the first CSI part 1401 may include RI 1305, CQI 1310, NNZC 1315, and TRP selection bitmap 1320, as described herein, and the second CSI part 1402 may include L n Report 1425 , SD base selection 1330 and optionally one or more additional fields 1335 .

[0180] For the example of CSI signaling 1400, L of the second CSI part 1402 n The bit size of the Report 1425 field can be determined based on N, such as However, in some examples, the network entity may not need the TRP selection bitmap 1320, for example because the size will be zero for some values ​​of N. For example, if N=1 sTRP is selected, then there is no need to report L n And the TRP selection bitmap 1320 may be omitted. In another example, if NN 1 N 2 ≤L tot (The total number of ports of N TRPs is not greater than L tot , for example, for a smaller N case, such as N=1 or 2), all NNs of all N selected TRPs should be selected1 N 2 SD base, and the TRP selection bitmap 1320 can be omitted.

[0181] In some examples, C(N 1 N 2 ,L n ) maximizes (e.g. by Maximize ) n The bit size of SD base selection 1330 can be determined based on the value of C(N 1 N 2 ,L n ) maximizes the L n Value (for example, determined as units), rather than based on, for example, n The actual L reported in Report 1425 n Value (for example, determined as In some cases, such as with reference to CSI signaling 1300, the size of the second CSI part 1402 may be determined after a network entity (e.g., a gNB) decodes the first CSI part 1401. However, for CSI signaling 1300, the first CSI part 1401 omits L n Report (including L n Report 1425 in the second CSI portion 1402).

[0182] Similar to the discussion herein with reference to CSI signaling 1300, for the L n Report 1425 Field Report L n For certain values ​​of , a portion (subset, subpart) of the 1330 field bit size (e.g., MSB or LSB) may be selected using the SD base, and zero padding may be used.

[0183] In some examples, the second CSI portion 1402 may include at least the SD basis selection 1330, an indication of the SD basis selection for each TRP #1, ..., N, respectively. 2 O 1 O 2 SD basis set for each TRP#n=1, ..., N. In some examples, the bit size for each of TRP#n=1, ..., N can be In some examples, the second CSI portion 1402 may include one or more additional fields 1335 , such as FD beam selection 1225 , SCI 1230 , coefficient selection bitmap 1235 , and quantization of NZC 1240 , as described with reference to the second UCI portion 1202 .

[0184] In some examples described herein, for the reported L n Value, report L n >N 1 N 2 may be invalid, where N 1 N 2 is the number of ports per TRP (and per polarization).

[0185] In some examples described herein, the actual reported total SD basis may be less than the configured L tot For example, if the total number of ports used for all selected TRPs is less than L tot (NN 1 N 2 ≤L tot ), then L tot,actual =min(NN 1 N 2 ,L tot ).

[0186] In some examples described herein, the maximum number of non-zero coefficients (NZC) K 0 Can be based on the configuration of L tot To determine: K 0 =β2L tot M, even if the actual amount L of the selected SD basis tot,actual =min(NN 1 N 2 ,L tot ) <L tot In the above equation, β∈(0,1) is used to determine K 0 configuration factor, and M is the TRP sharing amount of the selected FD basis.

[0187] In some examples described herein, the maximum number of non-zero coefficients (NZC) K 0 The actual amount L based on the selected SD tot,actual =min(NN 1 N 2 ,L tot ) to determine: K 0 =β2L tot M, where β∈(0,1) is used to determine K 0 configuration factor, and M is the TRP sharing amount of the selected FD basis.

[0188] Example Operation of User Equipment

[0189] Fig.16 It shows that at the UE (such as Figure 1 and Figure 3An example of a method 1600 for conducting wireless communications at a UE 104).

[0190] Method 1600 begins at step 1605, where configuration information indicating resources for a TRP set is received. In some cases, the operation of this step refers to the following steps: Fig.18 Circuits for receiving and / or code for receiving are described, or may be executed by the circuits and / or the code.

[0191] Method 1600 then proceeds to step 1610, where a codepoint is selected from a set of codepoints based at least in part on the amount of TRPs in the set of TRPs and the total amount of SD bases for the set of TRPs, the codepoint indicating the amount of SD base selected by the UE for each TRP in the set of TRPs. In some cases, the operation of this step refers to as described in reference to Fig.18 The circuit for selecting and / or the code for selecting are described, or can be executed by the circuit and / or the code.

[0192] Method 1600 then proceeds to step 1615, where CSI signaling is sent, the CSI signaling including an indication of a code point indicating the amount of SD basis for each TRP. In some cases, the operation of this step refers to as described in reference Fig.18 The described circuits for transmitting and / or codes for transmitting, or executable by the circuits and / or the codes.

[0193] In some aspects, sending channel state information signaling includes: sending a first CSI portion of CSI signaling, the first CSI portion including an indication of a code point indicating an amount of SD basis used for each TRP; and sending a second CSI portion of CSI signaling based at least in part on the first CSI portion, the second CSI portion indicating a selected SD basis for each TRP.

[0194] In some aspects, method 1600 further includes determining a cumulative amount of an SD basis corresponding to the TRP set, wherein the code point is based at least in part on the cumulative amount of the SD basis. In some cases, the operation of this step refers to as described in reference Fig.18 The circuit for selecting and / or the code for selecting are described, or can be executed by the circuit and / or the code.

[0195] In some aspects, method 1600 also includes receiving an indication of the total amount of FD bases for the TRP set. In some cases, the operation of this step refers to the Fig.18 Circuits for receiving and / or code for receiving are described, or may be executed by the circuits and / or the code.

[0196] In some aspects, the method 1600 further includes, for each TRP in the set of TRPs, determining an amount of FD basis for the TRP based at least in part on the total amount of FD basis, the amount of SD basis selected by the UE for the TRP, and the maximum amount of SD basis in the amount of SD basis selected by the UE for the set of TRPs. In some cases, the operation of this step refers to as described in reference Fig.18 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0197] In some aspects, method 1600 also includes receiving an indication of the total amount of FD bases for the TRP set. In some cases, the operation of this step refers to the Fig.18 Circuits for receiving and / or code for receiving are described, or may be executed by the circuits and / or the code.

[0198] In some aspects, the method 1600 further includes, for each TRP in the TRP set, determining an amount of FD basis for the TRP based at least in part on the total amount of FD basis, the amount of SD basis selected by the UE for the TRP, and the total amount of SD basis for the TRP set. In some cases, the operation of this step refers to as described in reference Fig.18 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0199] In some aspects, sending the first CSI portion of the CSI message further comprises sending, in the first CSI portion for each TRP in the set of TRPs, an indication of an amount of FD basis for the TRP.

[0200] In some aspects, the method 1600 further includes determining, based at least in part on the maximum number of TRPs in the set of TRPs, an amount of bits for an indication of a codepoint to be sent in the first CSI part of the CSI signaling. In some cases, the operation of this step refers to as described in reference to Fig.18 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0201] In some aspects, the method 1600 further includes selecting a subset of bits for the indication of the code point based at least in part on the amount of bits being less than the bit size of the field of the CSI signaling. In some cases, the operation of this step refers to as described in reference Fig.18 The circuit for selecting and / or the code for selecting are described, or can be executed by the circuit and / or the code.

[0202] In some aspects, method 1600 further includes inserting zero padding for the remaining amount of bits of the field. In some cases, the operation of this step refers to the operation of Fig.18The described circuit for inserting and / or code for inserting, or executable by the circuit and / or the code.

[0203] In some aspects, the amount of TRPs in the TRP set is one, and sending CSI signaling includes refraining from sending in a field of the CSI signaling used for an indication of a codepoint.

[0204] In some aspects, sending channel state information signaling includes: sending a first CSI portion of CSI signaling; and sending a second CSI portion of CSI signaling based at least in part on the first CSI portion, the second CSI portion including an indication of a code point indicating an amount of SD basis used for each TRP and indicating a selected SD basis used for each TRP.

[0205] In some aspects, a bit size of a field of the second CSI portion that includes an indication of a codepoint is based at least in part on the amount of TRPs in the TRP set.

[0206] In some aspects, a bit size of the field indicating the second CSI portion of the selected SD basis for each TRP is based at least in part on half of the total number of ports per TRP and per polarization.

[0207] In some aspects, the method 1600 further includes determining whether the amount of the SD basis selected by the UE is greater than the total amount of ports per TRP and per polarization, wherein the CSI signaling is sent based at least in part on determining that the amount of the SD basis is not greater than the total amount. In some cases, the operation of this step refers to as described in reference Fig.18 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0208] In some aspects, based at least in part on the amount of ports used for the TRP set being less than the total amount of SD bases used for the TRP set, the sum of the amounts of SD bases selected by the UE is less than the total amount of SD bases used for the TRP set.

[0209] In some aspects, method 1600 further includes determining a maximum number of non-zero coefficients based at least in part on the total amount of SD bases for the TRP set. In some cases, the operation of this step refers to the method described in reference to Fig.18 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0210] In some aspects, the method 1600 further includes determining a maximum number of non-zero coefficients based at least in part on the sum of the amounts of the SD basis selected by the UE. In some cases, the operation of this step refers to as described in reference Fig.18 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0211] In some aspects, the method 1600 further includes receiving data signaling via the TRP set. In some cases, the operation of this step refers to the Fig.18 Circuits for receiving and / or code for receiving are described, or may be executed by the circuits and / or the code.

[0212] In some aspects, the method 1600 further includes decoding the received data signaling based on the amount of SD basis for each TRP. In some cases, the operation of this step refers to the Fig.18 The described circuit for decoding and / or code for decoding may be performed by the circuit and / or the code.

[0213] In some aspects, the method 1600 further comprises receiving a CSI-RS from the TRP set, wherein the CSI signaling comprises one or more of a CQI, a RI, and a NNZC based at least in part on the received CSI-RS. In some cases, the operation of this step refers to as described in reference Fig.18 Circuits for receiving and / or code for receiving are described, or may be executed by the circuits and / or the code.

[0214] In some aspects, CSI signaling includes a first CSI part having a fixed size and a second CSI part having a size based at least in part on the first CSI part.

[0215] In one aspect, method 1600 or any aspect related thereto may be performed by an apparatus such as Fig.18 The method 1600 is performed by a communication device 1800 that includes various components that are operable, configured, or adapted to perform the method 1600. The communication device 1800 is described in more detail below.

[0216] Please note that Fig.16 This is merely one example of a method, and other methods including fewer, additional, or alternative steps may also be consistent with the present disclosure.

[0217] Example Operations of Network Entities

[0218] Fig.17 shows that at a network entity (such as Figure 1 and Figure 3 BS102 of Figure 2 An example of a method 1700 for performing wireless communications at a decomposed base station as discussed.

[0219] Method 1700 begins at step 1705, where configuration information indicating resources for a TRP set is sent to a UE. In some cases, the operation of this step refers to the following. Fig.19 The described circuits for transmitting and / or codes for transmitting, or executable by the circuits and / or the codes.

[0220] Method 1700 then proceeds to step 1710, where CSI signaling is received from the UE, the CSI signaling including a code point associated with an amount of SD basis for each TRP in the TRP set. In some cases, the operation of this step refers to as described in reference Fig.19 The described circuits for receiving and / or codes for receiving may be or may be executed by the circuits and / or codes.

[0221] Method 1700 then proceeds to step 1715, where the amount of SD base for each TRP in the TRP set is determined based at least in part on the amount of TRPs in the TRP set, the total amount of SD base for the TRP set, and the code point. In some cases, the operation of this step refers to the operation described in reference to Fig.19 The described circuits for determining and / or the code for determining, or may be executed by the circuits and / or the code.

[0222] In some aspects, receiving CSI signaling includes: receiving a first CSI portion of the CSI signaling, the first CSI portion including an indication of a code point indicating an amount of SD basis used for each TRP; and receiving a second CSI portion of the CSI signaling based at least in part on the first CSI portion, the second CSI portion indicating a selected SD basis for each TRP.

[0223] In some aspects, receiving channel state information signaling includes: receiving a first CSI portion of the CSI signaling; and receiving a second CSI portion of the CSI signaling based at least in part on the first CSI portion, the second CSI portion including an indication of a code point indicating an amount of SD basis used for each TRP and indicating a selected SD basis for each TRP.

[0224] In some aspects, a bit size of a field of the second CSI portion that includes an indication of a codepoint is based at least in part on the amount of TRPs in the TRP set.

[0225] In some aspects, a bit size of the field indicating the second CSI portion of the selected SD basis for each TRP is based at least in part on half of the total number of ports per TRP and per polarization.

[0226] In some aspects, the method 1700 further includes encoding data signaling based on the amount of SD basis for each TRP. In some cases, the operation of this step refers to the Fig.19 The described circuits for encoding and / or codes for encoding may be performed by the circuits and / or codes.

[0227] In some aspects, method 1700 further includes sending data signaling via the TRP set. In some cases, the operation of this step refers to the Fig.19 The described circuits for transmitting and / or codes for transmitting, or executable by the circuits and / or the codes.

[0228] In one aspect, method 1700 or any aspect related thereto may be performed by an apparatus such as Fig.19 The method 1700 is performed by a communication device 1900 that includes various components that are operable, configured, or adapted to perform the method 1700. The communication device 1900 is described in more detail below.

[0229] Please note that Fig.17 This is merely one example of a method, and other methods including fewer, additional, or alternative steps may also be consistent with the present disclosure.

[0230] Example Communication Device

[0231] Fig.18 Depicted are aspects of an example communications device 1800. In some aspects, communications device 1800 is user equipment, such as described above with respect to Figure 1 and Figure 3 UE 104 is described.

[0232] The communication device 1800 includes a processing system 1805 coupled to a transceiver 1885 (e.g., a transmitter and / or a receiver). The transceiver 1885 is configured to transmit and receive signals for the communication device 1800, such as various signals as described herein, via an antenna 1890. The processing system 1805 may be configured to perform processing functions for the communication device 1800, including processing signals received and / or to be transmitted by the communication device 1800.

[0233] The processing system 1805 includes one or more processors 1810. In various aspects, such as with respect to Figure 3 As described, the one or more processors 1810 may represent one or more of the receive processor 358, the transmit processor 364, the TX MIMO processor 366, and / or the controller / processor 380. The one or more processors 1810 are coupled to the computer-readable medium / memory 1845 via the bus 1880. In some aspects, the computer-readable medium / memory 1845 is configured to store instructions (e.g., computer-executable code) that, when executed by the one or more processors 1810, cause the one or more processors 1810 to perform operations related to the processing of the computer-readable medium / memory 1845. Fig.16The described method 1600 or any aspect related thereto. Note that references to a processor performing a function of the communication device 1800 may include one or more processors 1810 performing that function of the communication device 1800 .

[0234] In the depicted example, computer readable medium / memory 1845 stores code (e.g., executable instructions) such as code for receiving 1850, code for selecting 1855, code for sending 1860, code for determining 1865, code for inserting 1870, and code for decoding 1875. Processing of code for receiving 1850, code for selecting 1855, code for sending 1860, code for determining 1865, code for inserting 1870, and code for decoding 1875 may enable communication device 1800 to perform operations related to Fig.16 The described method 1600 or any aspect related thereto.

[0235] The one or more processors 1810 include circuits configured to implement (e.g., execute) code stored in the computer-readable medium / memory 1845, including circuits such as circuits for receiving 1815, circuits for selecting 1820, circuits for transmitting 1825, circuits for determining 1830, circuits for inserting 1835, and circuits for decoding 1840. Processing using the circuits for receiving 1815, circuits for selecting 1820, circuits for transmitting 1825, circuits for determining 1830, circuits for inserting 1835, and circuits for decoding 1840 may enable the communication device 1800 to perform operations related to Fig.16 The described method 1600 or any aspect related thereto.

[0236] The various components of the communication device 1800 may provide for performing Fig.16 The components of the described method 1600 or any aspect related thereto. For example, the components for sending, transmitting, or outputting for sending may include Figure 3 The transceiver 354 and / or antenna 352 and / or Fig.18 The transceiver 1885 and antenna 1890 of the communication device 1800 in FIG. 1 may include Figure 3 The transceiver 354 and / or antenna 352 and / or Fig.18 The transceiver 1885 and antenna 1890 of the communication device 1800.

[0237] Fig.19 Various aspects of an example communications device 1900 are depicted. In some aspects, communications device 1900 is a network entity such as Figure 1and Figure 3 BS102 or such Figure 2 The decomposed base station in question.

[0238] The communication device 1900 includes a processing system 1905 coupled to a transceiver 1965 (e.g., a transmitter and / or a receiver) and / or a network interface 1975. The transceiver 1965 is configured to transmit and receive signals for the communication device 1900 via an antenna 1970, such as the various signals described herein. The network interface 1975 is configured to transmit and receive signals for the communication device 1900 via a communication link (such as the various signals described herein). Figure 2 The processing system 1905 may be configured to perform processing functions of the communication device 1900, including processing signals received and / or to be transmitted by the communication device 1900.

[0239] The processing system 1905 includes one or more processors 1910. In various aspects, such as with respect to Figure 3 As described, the one or more processors 1910 may represent one or more of the receive processor 338, the transmit processor 320, the TX MIMO processor 330, and / or the controller / processor 340. The one or more processors 1910 are coupled to the computer-readable medium / memory 1935 via the bus 1960. In some aspects, the computer-readable medium / memory 1935 is configured to store instructions (e.g., computer-executable code) that, when executed by the one or more processors 1910, cause the one or more processors 1910 to perform operations related to the processing of the computer-readable medium / memory 1935. Fig.17 The described method 1700 or any aspect related thereto. Note that references to a processor of the communication device 1900 that performs a function may include one or more processors 1910 of the communication device 1900 that perform that function.

[0240] In the depicted example, computer readable medium / memory 1935 stores code (e.g., executable instructions) such as code for transmitting 1940, code for receiving 1945, code for determining 1950, and code for encoding 1955. Processing of code for transmitting 1940, code for receiving 1945, code for determining 1950, and code for encoding 1955 may enable communication device 1900 to perform operations related to Fig.17 The described method 1700 or any aspect related thereto.

[0241] The one or more processors 1910 include circuits configured to implement (e.g., execute) code stored in the computer-readable medium / memory 1935, including circuits such as circuits for transmitting 1915, circuits for receiving 1920, circuits for determining 1925, and circuits for encoding 1930. Processing using the circuits for transmitting 1915, the circuits for receiving 1920, the circuits for determining 1925, and the circuits for encoding 1930 may enable the communication device 1900 to perform operations related to Fig.17 The described method 1700 or any aspect related thereto.

[0242] The various components of the communication device 1900 may provide for performing Fig.17 The components of the described method 1700 or any aspect thereof. The components for sending, transmitting, or outputting for sending may include Figure 3 The transceiver 332 and / or antenna 334 and / or Fig.19 The transceiver 1965 and antenna 1970 of the communication device 1900 in FIG. 1 may include Figure 3 The transceiver 332 and / or antenna 334 and / or Fig.19 The transceiver 1965 and antenna 1970 of the communication device 1900.

[0243] Sample Clauses

[0244] Specific implementation examples are described in the following numbered clauses:

[0245] Clause 1: A method for wireless communication at a UE, the method comprising: receiving configuration information indicating resources for a TRP set; selecting a codepoint from a codepoint set based at least in part on an amount of TRPs in the TRP set and a total amount of SD bases for the TRP set, the codepoint indicating an amount of SD base selected by the UE for each TRP in the TRP set; and sending CSI signaling, the CSI signaling including an indication of the codepoint indicating the amount of SD base for each TRP.

[0246] Clause 2: A method according to clause 1, wherein sending the channel state information signaling comprises: sending a first CSI part of the CSI signaling, the first CSI part including the indication of the code point indicating the amount of SD basis used for each TRP; and sending a second CSI part of the CSI signaling based at least in part on the first CSI part, the second CSI part indicating a selected SD basis for each TRP.

[0247] Clause 3: The method according to Clause 2 further includes: receiving an indication of a total amount of FD bases used for the TRP set; and for each TRP in the TRP set, determining an amount of FD bases used for the TRP based at least in part on the total amount of FD bases, the amount of SD bases selected by the UE for the TRP, and the maximum amount of SD bases among the amounts of SD bases selected by the UE for the TRP set.

[0248] Clause 4: The method according to Clause 2 further includes: receiving an indication of a total amount of FD bases used for the TRP set; and for each TRP in the TRP set, determining an amount of FD bases used for the TRP based at least in part on the total amount of FD bases, the amount of SD bases selected by the UE for the TRP, and the total amount of SD bases used for the TRP set.

[0249] Clause 5: The method of clause 2, wherein sending the first CSI portion of the CSI message further comprises sending, in the first CSI portion for each TRP in the set of TRPs, an indication of an amount of FD basis for the TRP.

[0250] Clause 6: A method according to clause 2, the method further comprising: determining a quantity of bits for the indication of the code point to be sent in the first CSI part of the CSI signaling based at least in part on a maximum number of TRPs in the TRP set; selecting a subset of the bits for the indication of the code point based at least in part on the quantity of bits being less than a bit size of a field of the CSI signaling; and inserting zero padding for a remaining quantity of bits of the field.

[0251] Clause 7: The method of clause 2, wherein the amount of TRPs in the set of TRPs is one, and sending the CSI signaling comprises refraining from sending in the field of the CSI signaling used for the indication of the codepoint.

[0252] Clause 8: A method according to any one of clauses 1 to 7, wherein sending the channel state information signaling comprises: sending a first CSI part of the CSI signaling; and sending a second CSI part of the CSI signaling based at least in part on the first CSI part, the second CSI part comprising the indication of the code point, the code point indicating the amount of SD basis used for each TRP and indicating the selected SD basis used for each TRP.

[0253] Clause 9: The method of clause 8, wherein a bit size of a field of the second CSI part that includes the indication of the codepoint is based at least in part on the amount of TRPs in the set of TRPs.

[0254] Clause 10: The method of clause 8, wherein a bit size of the field of the second CSI part indicating the selected SD basis for each TRP is based at least in part on half of the total number of ports per TRP and per polarization.

[0255] Clause 11: A method according to any one of clauses 1 to 10, the method further comprising: determining whether the amount of the SD basis selected by the UE is greater than the total amount of ports per TRP and per polarization, wherein the CSI signaling is sent at least in part based on determining that the amount of the SD basis is not greater than the total amount.

[0256] Clause 12: A method according to any one of clauses 1 to 11, wherein the sum of the amounts of SD bases selected by the UE is less than the total amount of SD bases used for the TRP set, at least in part based on the amount of ports used for the TRP set being less than the total amount of SD bases used for the TRP set.

[0257] Clause 13: A method according to any one of clauses 1 to 12, the method further comprising: receiving data signaling via the set of TRPs; and decoding the received data signaling based on the amount of SD basis for each TRP.

[0258] Clause 14: A method according to any one of clauses 1 to 13, the method further comprising: receiving a CSI-RS from the TRP set, wherein the CSI signaling comprises one or more of a CQI, a RI, a NNZC based at least in part on the received CSI-RS.

[0259] Clause 15: A method as set forth in any of clauses 1 to 14, wherein the CSI signaling comprises a first CSI part having a fixed size and a second CSI part having a size based at least in part on the first CSI part.

[0260] Clause 16: A method according to any one of clauses 1 to 15, further comprising: determining a cumulative amount of an SD basis corresponding to the TRP set, wherein the code point is at least partially based on the cumulative amount of the SD basis.

[0261] Clause 17: A method according to any one of clauses 1 to 16, further comprising: determining a maximum number of non-zero coefficients based at least in part on the total amount of SD basis used for the TRP set.

[0262] Clause 18: A method as described in any of clauses 1 to 17, the method further comprising: determining a maximum number of non-zero coefficients based at least in part on the sum of the amounts of SD basis selected by the UE.

[0263] Clause 19: A method for wireless communication at a network entity, the method comprising: sending configuration information indicating resources for a TRP set to a UE; receiving CSI signaling from the UE, the CSI signaling comprising a code point associated with an amount of SD basis for each TRP in the TRP set; and determining the amount of SD basis for each TRP in the TRP set based at least in part on the amount of TRPs in the TRP set, the total amount of SD basis for the TRP set, and the code point.

[0264] Clause 20: A method according to clause 19, wherein receiving the CSI signaling comprises: receiving a first CSI portion of the CSI signaling, the first CSI portion comprising an indication of the code point indicating the amount of SD basis used for each TRP; and receiving a second CSI portion of the CSI signaling based at least in part on the first CSI portion, the second CSI portion indicating a selected SD basis for each TRP.

[0265] Clause 21: A method according to any one of clauses 19 and 20, wherein receiving the channel state information signaling comprises: receiving a first CSI part of the CSI signaling; and receiving a second CSI part of the CSI signaling based at least in part on the first CSI part, the second CSI part comprising the indication of the code point, the code point indicating the amount of SD basis used for each TRP and indicating the selected SD basis used for each TRP.

[0266] Clause 22: The method of clause 21, wherein a bit size of a field of the second CSI part that includes the indication of the codepoint is based at least in part on the amount of TRPs in the set of TRPs.

[0267] Clause 23: A method according to clause 21, wherein the bit size of the field of the second CSI part indicating the selected SD basis for each TRP is based at least in part on the indicated amount of SD basis selected by the UE.

[0268] Clause 24: A method according to any one of clauses 19 to 23, further comprising: encoding data signaling based on the amount of SD basis for each TRP; and sending the data signaling via the set of TRPs.

[0269] Clause 25: An apparatus comprising: a memory including executable instructions; and a processor configured to execute the executable instructions and cause the apparatus to perform the method of any one of clauses 1 to 24.

[0270] Clause 26: An apparatus comprising means for performing the method according to any one of clauses 1 to 24.

[0271] Clause 27: A non-transitory computer readable medium comprising executable instructions which, when executed by a processor of an apparatus, cause the apparatus to perform the method of any one of clauses 1 to 24.

[0272] Clause 28: A computer program product embodied on a computer readable storage medium, the computer readable storage medium comprising code for performing the method according to any one of clauses 1 to 24.

[0273] Additional considerations

[0274] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein do not limit the scope, applicability, or aspects set forth in the claims. 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. For example, without departing from the scope of the present disclosure, the functions and arrangements of the elements discussed may be changed. Various examples may omit, replace, or add various processes or components as appropriate. For example, the described methods may be performed in a different order from the described order, and various actions may be added, omitted, or combined. In addition, the features described for some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionality, or structures and functionality other than the various aspects of the present disclosure set forth herein or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0275] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or performed using a general purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic components, discrete hardware components, or any combination thereof, designed to perform the functions described herein. Although a general purpose processor may be a microprocessor, in an alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, a system on a chip (SoC), or any other such configuration.

[0276] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items (including single members). As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0277] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Additionally, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Additionally, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0278] The method disclosed herein includes one or more actions for implementing the method. The method actions may be interchangeable with each other without departing from the scope of the claims. In other words, unless a specified order of actions is specified, the order and / or use of specific actions may be modified without departing from the scope of the claims. In addition, the various operations of the method described above may be performed by any suitable component capable of performing the corresponding function. The component may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs) or processors.

[0279] The following claims are not intended to be limited to the various aspects shown herein, but should be given the full scope consistent with the language of the claims. Within the claims, unless specifically stated otherwise, reference to an element in the singular form is not intended to mean "one and only one", but "one or more". Unless specifically stated otherwise, the term "some" refers to one or more. Any claim element is not interpreted according to the provisions of 35 U.S.C. § 112 (f) unless the element is explicitly stated using the phrase "parts for...". All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are known or will be known later to a person of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims.

Claims

1. A method for wireless communication at a user equipment (UE), the method include: receiving configuration information indicating resources for a set of transmit reception points (TRPs); selecting a codepoint from a set of codepoints based at least in part on a quantity of TRPs in the set of TRPs and a total quantity of spatial domain (SD) basis for the set of TRPs, the codepoint indicating an amount of SD basis selected by the UE for each TRP in the set of TRPs; and Channel state information (CSI) signaling is sent, and the channel state information (CSI) signaling includes an indication of the code point indicating the amount of SD basis used for each TRP.

2. The method according to claim 1, further comprising: include: Determine a cumulant of an SD basis corresponding to the set of TRPs, wherein the code point is based at least in part on the cumulant of the SD basis.

3. The method according to claim 1, wherein the channel state information signaling is sent include: transmitting a first CSI part of the CSI signaling, the first CSI part comprising the indication of the codepoint indicating the amount of SD basis for each TRP; as well as A second CSI portion of the CSI signaling is sent based at least in part on the first CSI portion, the second CSI portion indicating a selected SD basis for each TRP.

4. The method according to claim 2, further comprising: include: receiving an indication of an amount of frequency domain (FD) basis for the set of TRPs; as well as For each TRP in the TRP set, the amount of FD bases used for the TRP is determined at least in part based on the total amount of FD bases, the amount of SD bases selected by the UE for the TRP, and the maximum amount of SD bases among the amounts of SD bases selected by the UE for the TRP set.

5. The method according to claim 2, further comprising: include: receiving an indication of an amount of frequency domain (FD) basis for the set of TRPs; as well as For each TRP in the TRP set, an amount of FD base used for the TRP is determined based at least in part on the total amount of FD base, the amount of SD base selected by the UE for the TRP, and the total amount of SD base used for the TRP set.

6. The method according to claim 2, wherein the first CSI part of the CSI message is further transmitted include: An indication of a quantity of a frequency domain (FD) basis used for each TRP in the TRP set is sent in the first CSI part for the TRP.

7. The method according to claim 2, further comprising: include: determining a quantity of bits for the indication of the codepoint to be sent in the first CSI part of the CSI signaling based at least in part on a maximum number of TRPs in the set of TRPs; as well as The subset of bits used for the indication of the codepoint is selected based at least in part on the amount of bits being less than a bit size of a field of the CSI signaling.

8. The method of claim 2, wherein the amount of TRPs in the TRP set is one, and sending the CSI signaling comprises suppressing sending in the field of the CSI signaling used for the indication of the code point.

9. The method according to claim 1, wherein the channel state information signaling is sent include: sending a first CSI part of the CSI signaling; as well as A second CSI portion of the CSI signaling is sent based at least in part on the first CSI portion, the second CSI portion including the indication of the code point, the code point indicating the amount of SD basis used for each TRP and indicating a selected SD basis for each TRP.

10. The method of claim 8, wherein a bit size of a field of the second CSI part that includes the indication of the codepoint is based at least in part on the amount of TRPs in the set of TRPs.

11. The method of claim 8, wherein a bit size of a field of the second CSI part indicating a selected SD basis for each TRP is based at least in part on half of a total number of ports per TRP and per polarization.

12. The method according to claim 1, further comprising: include: Determine whether the amount of the SD basis selected by the UE is greater than the total amount of ports per TRP and per polarization, wherein the CSI signaling is sent at least in part based on determining that the amount of the SD basis is not greater than the total amount.

13. A method according to claim 1, wherein at least in part based on the fact that the amount of ports used for the TRP set is less than the total amount of SD bases used for the TRP set, the sum of the amounts of SD bases selected by the UE is less than the total amount of SD bases used for the TRP set.

14. The method according to claim 13, further comprising: include: A maximum number of non-zero coefficients is determined based at least in part on the total amount of SD basis for the TRP set.

15. The method according to claim 13, further comprising: include: A maximum number of non-zero coefficients is determined based at least in part on the sum of the quantities of SD basis selected by the UE.

16. A method for wireless communication at a network entity, the method include: sending configuration information indicating resources for a set of transmit reception points (TRPs) to a user equipment (UE); receiving channel state information (CSI) signaling from the UE, the channel state information (CSI) signaling comprising a codepoint associated with a quantity on a spatial domain (SD) basis for each TRP in the set of TRPs; as well as The amount of spatial domain (SD) basis for each TRP in the TRP set is determined based at least in part on the amount of TRPs in the TRP set, the total amount of SD basis used for the TRP set, and the code point.

17. The method of claim 16, wherein receiving the CSI signaling include: receiving a first CSI part of the CSI signaling, the first CSI part comprising an indication of the codepoint indicating the amount of SD basis for each TRP; as well as A second CSI portion of the CSI signaling is received based at least in part on the first CSI portion, the second CSI portion indicating a selected SD basis for each TRP.

18. The method of claim 16, wherein receiving the channel state information signaling include: receiving a first CSI part of the CSI signaling; as well as A second CSI portion of the CSI signaling is received based at least in part on the first CSI portion, the second CSI portion including the indication of the code point indicating the amount of SD basis for each TRP and indicating a selected SD basis for each TRP.

19. The method of claim 18, wherein a bit size of a field of the second CSI part that includes the indication of the codepoint is based at least in part on the amount of TRPs in the set of TRPs.

20. The method of claim 18, wherein a bit size of a field of the second CSI part indicating a selected SD basis for each TRP is based at least in part on half of a total number of ports per TRP and per polarization.

21. The method according to claim 16, further comprising: include: encoding data signaling based on said amount of SD basis for each TRP; as well as The data signaling is sent via the TRP set.

22. A device, the device include: a memory including executable instructions; and a processor configured to execute the executable instructions and cause the apparatus to perform the method according to any one of claims 1 to 21.

23. An apparatus comprising means for performing the method according to any one of claims 1 to 21.

24. A non-transitory computer readable medium comprising executable instructions which, when executed by a processor of a device, cause the device to perform the method of any one of claims 1 to 21.

25. A computer program product embodied on a computer-readable storage medium, the computer-readable storage medium comprising code for executing the method according to any one of claims 1 to 21.

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