Determination of CSI reference resource
Patent Information
- Application Number
- PCT/CN2025/085531
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-10-01
Smart Images

Figure CN2025085531_01102026_PF_FP_ABST
Abstract
Description
DETERMINATION OF CSI REFERENCE RESOURCEFIELD
[0001] Various example embodiments relate to the field of communication, and in particular, to devices, methods, apparatuses, and a computer readable medium for determination of a channel state information (CSI) reference resource, for example, when orthogonal cover code (OCC) is configured for physical uplink shared channel (PUSCH) repetitions.BACKGROUND
[0002] A communication network can be seen as a facility that enables communications between two or more communication devices, or provides communication devices access to a data network. A mobile or wireless communication network is one example of a communication network.
[0003] Such communication networks operate in accordance with standards, such as those promulgated by 3GPP (Third Generation Partnership Project) or ETSI (European Telecommunications Standards Institute) . Examples of such standards include the so-called 5G (5th Generation) standard or other standards promulgated by 3GPP.SUMMARY
[0004] In general, example embodiments of the present disclosure provide a solution for communication, especially for determination of a CSI reference resource when OCC is configured or enabled for PUSCH repetitions. With this solution, a CSI report that is not configured in the first slot of an OCC period can be available in an earlier time, thereby being multiplexed in a plurality of PUSCH repetitions within the OCC period (for example, all the PUSCH repetitions within the OCC period) .
[0005] In a first aspect, there is provided a terminal device. The terminal device comprises at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to: determine that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled; determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and derive the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0006] In a second aspect, there is provided a network device. The network device comprises at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: transmit, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions; determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and receive a CSI report from the terminal device.
[0007] In a third aspect, there is provided a method. The method comprises: determining that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled; determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and deriving the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0008] In a fourth aspect, there is provided a method. The method comprises: transmitting, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions; determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and receiving a CSI report from the terminal device.
[0009] In a fifth aspect, there is provided an apparatus. The apparatus comprises: means for determining that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled; means for determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and means for deriving the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0010] In a sixth aspect, there is provided an apparatus. The apparatus comprises: means for transmitting, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions; means for a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and means for receiving a CSI report from the terminal device.
[0011] In a seventh aspect, there is provided a computer readable medium comprising program instructions for causing an apparatus to perform at least method of the above third aspect or fourth aspect.
[0012] In an eighth aspect, there is provided a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus to perform at least the method of the above third aspect or fourth aspect.
[0013] In a ninth aspect, there is provided a terminal device. The terminal device comprises: first determining circuitry configured to determine that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled; second determining circuitry configured to determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and deriving circuitry configured to derive the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0014] In a tenth aspect, there is provided a network device. The network device comprises: transmitting circuitry configured to transmit, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions; determining circuitry configured to determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and receiving circuitry configured to receive a CSI report from the terminal device.
[0015] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Some example embodiments will now be described with reference to the accompanying drawings, in which:
[0017] FIG. 1A illustrates an example communication network in which embodiments of the present disclosure may be implemented;
[0018] FIG. 1B illustrates an exemplary schematic diagram of OCC with an OCC length of 2 PUSCH slots for 2 terminal devices doing 2 PUSCH repetitions in the same time-frequency resource;
[0019] FIG. 1C illustrates an exemplary schematic diagram of determining a CSI reference resource;
[0020] FIG. 2 illustrates a flowchart illustrating an example process for determination of a CSI reference resource when OCC is configured for PUSCH repetitions according to some embodiments of the present disclosure;
[0021] FIG. 3 illustrates an exemplary schematic diagram of determining a CSI reference resource according to some embodiments of the present disclosure;
[0022] FIG. 4 illustrates an exemplary schematic diagram of determining a CSI reference resource according to some embodiments of the present disclosure;
[0023] FIG. 5 illustrates a flowchart illustrating another example process for determination of a CSI reference resource when OCC is configured for PUSCH repetitions according to some embodiments of the present disclosure;
[0024] FIG. 6 illustrates a flowchart of an example method implemented at a terminal device according to some other embodiments of the present disclosure;
[0025] FIG. 7 illustrates a flowchart of an example method implemented at a network device according to some other embodiments of the present disclosure;
[0026] FIG. 8 illustrates a simplified block diagram of a device that is suitable for implementing some example embodiments of the present disclosure; and
[0027] FIG. 9 illustrates a block diagram of an example of a computer-readable medium in accordance with some example embodiments of the present disclosure.
[0028] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0029] Principles of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below.
[0030] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0031] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0032] It shall be understood that although the terms “first” and “second” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0034] As used in this application, the term “circuitry” may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable) : (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (for example, firmware) for operation, but the software may not be present when it is not needed for operation.
[0035] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
[0036] As used herein, the term “network” , “communication network” or “data network” refers to a network following any suitable communication standards, such as long-term evolution (LTE) , LTE-advanced (LTE-A) , wideband code division multiple access (WCDMA) , high-speed packet access (HSPA) , narrow band Internet of things (NB-IoT) , wireless fidelity (Wi-Fi) and so on. Furthermore, the communications between a terminal device and a network device / element in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the fourth generation (4G) , 4.5G, the future fifth generation (5G) , IEEE 802.11 communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0037] As used herein, the term “network device” refers to a node in a communication network via which a terminal device receives services (e.g., positioning services) therefrom. The network device may refer to a core network device or access network device, such as base station (BS) or an access point (AP) or a transmission and reception point (TRP) , for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a remote radio unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a WiFi device, a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology. In the following description, the terms “network device” , “AP device” , “AP” and “access point” may be used interchangeably.
[0038] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , a station (STA) or station device, or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (for example, remote surgery) , an industrial device and applications (for example, a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms “station” , “station device” , “STA” , “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0039] FIG. 1A illustrates a schematic diagram of an example communication network 100 in which some embodiments of the present disclosure can be implemented. As shown in FIG. 1A, the communication network 100 may include a plurality of terminal devices 110-1, …, 110-N and a network device 120. The plurality of terminal devices 110-1, …, 110-N may communicate with the network device 120 at the same time.
[0040] It is to be understood that the number of network devices and terminal devices is only for the purpose of illustration without suggesting any limitations. The communication network 100 may include any suitable number of network devices and terminal devices adapted for implementing embodiments of the present disclosure.
[0041] Communications in the communication network 10 may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols of the first generation (1G) , the second generation (2G) , the third generation (3G) , the fourth generation (4G) , the fifth generation (5G) and the sixth generation (6G) and on the like, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0042] Now, an objective on Uplink Capacity / Throughput Enhancement for Frequency Range 1-Non-Terrestrial Networks (FR1-NTN) was approved. Study then specify, if beneficial, discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) PUSCH enhancements via orthogonal cover code (OCC) . In the study, it determines the achievable capacity improvement to be targeted taking into account realistic impairments (e.g. Doppler, time variation, phase distortion, etc) . In the study, it specifies necessary signaling, if needed. In the study, it updates RF requirements accordingly, if needed. The study can consider orthogonal cover codes across OFDM symbols, across slots, and / or within an OFDM symbol. The enhancement is not targeting improvements / impacts of multi-user multiple-input multiple-output (MU-MIMO) capability. The enhancement is not targeted to PUSCH DMRS. No enhancement for initial access. Enhancements to physical random access channel (PRACH) are not in scope. This feature may be applicable for UEs operating in terrestrial networks based on a common design.
[0043] Now, inter-slot OCC with OCC length 2 and OCC length 4 will be supported. In a first scenario, it may support OCC length 2 with inter-slot OCC to multiplex up to 2 UEs. For example, it supports inter-slot OCC with OCC length 4 to multiplex up to 4 UEs using Hadamard sequences. In a second scenario, it may support intra-symbol pre-DFT OCC with OCC length 4 to multiplex up to 4 UEs. In a third scenario, it may support combination of inter-slot OCC with OCC length 2 and intra-symbol pre-DFT OCC with OCC length 2 to multiplex up to 4 UEs. It is noted that there will be separate UE capabilities for OCC length 2 and OCC length 4, where UE capability for OCC length 2 is a prerequisite for UE capability for OCC length 4. It is noted that gNB can ensure the performance of the first scenario by UE grouping with similar carrier frequency offset (CFO) . In an example, maximum differential CFO of 50 or 100 Hz or 200 Hz. Without CFO grouping (e.g. maximum differential CFO of 400 Hz) , the performance of the first scenario is degraded by at least 1 dB in several cases. For CFO grouping, several companies in RAN1 state that CFO grouping is feasible based on network implementation without any new specification impact.
[0044] RAN1 assumes no specification impact for CFO grouping. RAN1 does not pursue closed-loop frequency adjustment commands. RAN1 assumes that RAN4 does not define new UE requirements for CFO.
[0045] OCC is a coding technique that can be used to enhance the capacity / throughput of a cellular network. In particular, one could generate a set of orthogonal codes (e.g. Walsh-Hadamard codes) having ideal zero cross-correlation and assign different codes to different UEs to achieve orthogonal (i.e. no interference) UL transmissions on the same time-frequency resources.
[0046] To illustrate the principle of OCC, an example is shown in FIG. 1B in which two UEs are transmitting 2 PUSCH repetitions 102 and 104 in the same time-frequency resources. The two UEs may be referred to as UE_1 and UE_2 in the following. For the transmissions, the two UEs apply different OCCs to their transmission signal (which is assumed here to stay constant across the repetitions) allowing a gNB receiver to receive (i.e. demodulate and decode) the signals of each UE without the interference of the other UE. In mathematical form, how this works is represented in the system of equation below (without channel impairments and additive noise for simplicity of description) where x1 and x2 are the signals transmitted by UE_1 and UE_2, respectively and in both repetitions, whereas y1 and y2 are the total signals received by the gNB in the first and second repetition, respectively. It is to be noted that in this example UE_1 is applying the OCC [1, 1] whereas UE_2 is applying the OCC [1, -1] . In the example of the equations, gNB retrieves the signal of UE_2 without interference from UE_1 by cross-correlating the two received signal y1 and y2 with the OCC used by UE_2 (i.e. [1, -1] ) .
[0047]
[0048] The example above is only illustrative and uses Walsh-Hadamard orthogonal codes as OCC set. Different sequences can be used to realize orthogonality among users without impacting the applicability of embodiments of the present disclosure. In addition, it is to be noted that in general in order to multiplex N UEs a number of at least N PUSCH (or signal) repetitions may be necessary.
[0049] Further, a UE is normally configured to transmit UL control information (UCI) on the PUCCH. The uplink control information may contain channel state information (CSI) , scheduling requests (SR) and hybrid automatic repeat request-acknowledgement (HARQ-ACK) information. As part of the normal data transmission, the UE’s payload would be transmitted on the PUSCH, which would normally be transmitted in either a full slot or during a fraction of a slot. In the context, it is assumed that the UE is transmitting during a full slot due to the normal expected use case of UE being in coverage shortage for being able to utilize OCC on top of the PUSCH repetitions.
[0050] When a UE has both PUCCH and PUSCH expected to be transmitted in the same slot (or more generically in overlapping time resources) , the UE may need to “make room” in the normal PUSCH resources to be able to transmit the PUCCH along with the PUSCH transmission. If a UE transmits a PUSCH over one or more slots or multiple PUSCHs over one or more slots that are scheduled by a DCI format, and the UE would transmit a PUCCH with HARQ-ACK and / or CSI information over a single slot that overlaps with the PUSCH transmission in the one or more slots, and the PUSCH transmission in the one or more slots fulfills the conditions in 3GPP TS 38.213 clause 9.2.5 for multiplexing the HARQ-ACK and / or CSI information, the UE multiplexes the HARQ-ACK and / or CSI information in the PUSCH transmission in the one or more slots. The UE does not multiplex HARQ-ACK and / or CSI information in the PUSCH transmission in a slot from the one or more slots if the UE would not transmit a single-slot PUCCH with HARQ-ACK and / or CSI information in the slot in case the PUSCH transmission was absent.
[0051] In case of inter-slot OCC, to guarantee the orthogonality, the transmitted symbols of each PUSCH repetition within an OCC period need to be identical. Therefore, if a CSI report (UCI) needs to be multiplexed on one of the PUSCH repetitions with OCC enabled, then the CSI report need to be multiplexed on each of the PUSCH repetitions of the OCC period to make sure that the transmitted symbols of each PUSCH repetition are identical.
[0052] The details of the definition of CSI reference resource is provided in chapter 5.2.2.5 of TS 38.214. Below key paragraph describes how the CSI reference resource for a CSI reporting is determined in time domain.
[0053] In the time domain, the CSI reference resource for a CSI reporting in uplink slot n' is defined by a single downlink slot whereKoffset is a parameter configured by higher layer as specified in clause 4.2 of [6 TS 38.213] , and where is the subcarrier spacing configuration for Koffset with a value of 0 for frequency range 1,
[0054] where andμDL and μUL are the subcarrier spacing configurations for DL and UL, respectively, and andμoffsetare determined by higher-layer configured ca-SlotOffset for the cells transmitting the uplink and downlink, as defined in clause 4.5 of [4, TS 38.211] .
[0055] Where for periodic and semi-persistent CSI reporting, if a single CSI-RS / SSB resource is configured for channel measurement nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot, or if multiple CSI-RS / SSB resources are configured for channel measurement nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot.
[0056] Where for aperiodic CSI reporting, if the UE is indicated by the DCI to report CSI in the same slot as the CSI request, nCSI_ref is such that the reference resource is in the same valid downlink slot as the corresponding CSI request, otherwise nCSI_ref is the smallest value greater than or equal to such that slot n-nCSI_ref corresponds to a valid downlink slot, where Z' corresponds to the delay requirement as defined in Clause 5.4.
[0057] When periodic or semi-persistent CSI-RS / CSI-IM or SSB is used for channel / interference measurements, the UE is not expected to measure channel / interference on the CSI-RS / CSI-IM / SSB whose last OFDM symbol is received up to Z' symbols before transmission time of the first OFDM symbol of the aperiodic CSI reporting.
[0058] The specification of channel quality indicator (CQI) is provided in chapter 5.2.2.1 of TS 38.214. Below key paragraphs describe how CSI reference resource is used for the derivation of channel quality indicator (CQI) .
[0059] Based on an unrestricted observation interval in time unless specified otherwise in this Clause, and an unrestricted observation interval in frequency, the UE derives for each CQI value reported in uplink slot n the highest CQI index which satisfies the following condition:
[0060] - A single PDSCH transport block with a combination of modulation scheme, target code rate and transport block size corresponding to the CQI index, and occupying a group of downlink physical resource blocks termed the CSI reference resource, could be received with a transport block error probability not exceeding:
[0061] - 0.1, if the higher layer parameter cqi-Table in CSI-ReportConfig configures 'table1' (corresponding to Table 5.2.2.1-2) , or 'table2' (corresponding to Table 5.2.2.1-3) , or if the higher layer parameter cqi-Table in CSI-ReportConfig configures 'table4-r17' (corresponding to Table 5.2.2.1-5) , or
[0062] - 0.00001, if the higher layer parameter cqi-Table in CSI-ReportConfig configures 'table3' (corresponding to Table 5.2.2.1-4) .
[0063] If the higher layer parameter timeRestrictionForChannelMeasurements is set to "notConfigured" , the UE shall derive the channel measurements for computing CSI value reported in uplink slot n based on only the non-zero-power (NZP) CSI-RS, no later than the CSI reference resource, (defined in TS 38.211 [4] ) associated with the CSI resource setting.
[0064] If the higher layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured" , the UE shall derive the channel measurements for computing CSI reported in uplink slot n based on only the most recent, no later than the CSI reference resource, in cell DTX active time if cell DTX is activated, occasion of NZP CSI-RS (defined in [4, TS 38.211] ) associated with the CSI resource setting.
[0065] To guarantee the OCC orthogonality, when a CSI is multiplexed in PUSCH, this CSI needs to be multiplexed in all the PUSCH repetitions within an OCC period. However, if the CSI report is configured in a slot other than the first slot, then the CSI report may not be available in the first slot according to the rules for CSI reference resource determination defined in current 3GPP specifications (see FIG. 1C) .
[0066] According to some embodiments of the present disclosure, there is provided a solution for the determination of a CSI reference resource, for instance, in a case that a UE is configured with inter-slot OCC for PUSCH repetitions. In particular, a method is proposed to shift the CSI reference resource for a CSI report earlier when OCC is configured for PUSCH repetitions so that UE can start the derivation of the CSI earlier, so that UE can provide the CSI report in the first slot of an OCC period.
[0067] In other words, some embodiments of the present disclosure provide a solution for determination of a CSI reference resource when OCC is configured for PUSCH repetitions. With this solution, a CSI report that is not configured in the first slot of an OCC period can be available in an earlier time, thereby being multiplexed in a plurality of PUSCH repetitions within the OCC period (for example, all the PUSCH repetitions within the OCC period) . Principles and embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0068] FIG. 2 illustrates a flowchart illustrating an example process for determination of a CSI reference resource when OCC is configured for PUSCH repetitions according to some embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1A. The process 200 may involve one or more of the terminal devices 110-1, …, 110-N and the network device 120 as illustrated in FIG. 1A. For illustration, the terminal devices 110-1 is taken as an example below.
[0069] As shown in FIG. 2, at 202, the network device 120 transmits, to a terminal device110-1, a message 204 for configuring or enabling OCC for PUSCH repetitions. At 206, the terminal device 110-1 receives the message 204. At 210, the terminal device 110-1 determines that PUSCH repetitions with OCC are configured or enabled. At 212, the terminal device 110-1 determines a first CSI reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset. Here the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions. At 216, the terminal device 110-1 derives the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0070] At 214, the network device 120 determines a first CSI reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset. Here the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions. At 222, the network device 120 receives a CSI report from the terminal device.
[0071] It is noted that the action at 214 may be performed in parallel with the actions at 212, or may be performed before or after the actions at 212.
[0072] With the solution of the process 200, a CSI report that is not configured in the first slot of an OCC period can be available in an earlier time, thereby being multiplexed in a plurality of PUSCH repetitions within the OCC period (for example, all the PUSCH repetitions within the OCC period) .
[0073] FIG. 3 illustrates an exemplary schematic diagram of determining a CSI reference resource according to some embodiments of the present disclosure. As shown in FIG. 3, an OCC period k includes slots n, n+1, n+2 and n+3. The slot n is the 1st slot of OCC period k. It is assumed that all the downlink (DL) slots are valid slots. A CSI report is configured in the 2nd slot of the OCC period k, that is slot n+1 of the OCC period k. A CSI reference resource 101 is determined according to current 3GPP specifications at slot n-k. It is required that the time difference T1 between slot n-k and slot n+1 is equal to or higher than a minimum time tmin. The minimum time tmin is a minimum requirement of computation of a CSI according to current 3GPP specifications. Where for periodic and semi-persistent CSI reporting, if a single CSI-RS / SSB resource is configured for channel measurement nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot, or if multiple CSI-RS / SSB resources are configured for channel measurement nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot. Currently, a CSI report cannot be available in the first slot with the CSI reference resource 101 if the CSI report is not configured in the first slot.
[0074] As proposed by some embodiments of the present disclosure, the terminal device 110-1 determines a CSI reference resource 302 based on the CSI reference resource 101 and a time offset T-offset, such that the CSI reference resource 302 is earlier than the CSI reference resource 101. In the example of FIG. 3, the CSI reference resource 302 is determined in the slot n-j. The time difference between slot n-j and slot n-k is denoted as T-offset (with the assumption that DL and PUSCH and PUCCH have same sub-carrier spacing configuration) . Here, j≥k. In the context, the CSI reference resource 302 is referred to as a first CSI reference resource. The CSI reference resource 101 is referred to as a second CSI reference resource.
[0075] In the example of FIG. 3, the CSI report is configured in the second slot of the OCC period k. If the time offset T-offset is one PUSCH slot, then the CSI report can be available in the first slot of the OCC period k. In this case, for the CSI report originally configured in the second slot of the OCC period k, it can be available in the first slot of the OCC period k. Therefore, the CSI report can be multiplexed with all the PUSCH repetitions within the OCC period.
[0076] In another example, the CSI report may be configured in the third slot of the OCC period k. If the time offset T-offset is two PUSCH slots, then the CSI report can be available in the first slot of the OCC period k. In this case, for the CSI report originally configured in the third slot of the OCC period k, it can be available in the first slot of the OCC period k. Therefore, the CSI report can be multiplexed with all the PUSCH repetitions within the OCC period.
[0077] In another example, the CSI report may be configured in the fourth slot of the OCC period k. If the time offset T-offset is three PUSCH slots, then the CSI report can be available in the first slot of the OCC period k. In this case, for the CSI report originally configured in the fourth slot of the OCC period k, it can be available in the first slot of the OCC period k. Therefore, the CSI report can be multiplexed with all the PUSCH repetitions within the OCC period.
[0078] From the above, it can be seen that if the T-offset is equal to or greater than (occlength -1) UL (that is, PUSCH) slots, then UE is always able to provide a CSI report in the first slot of an OCC period no matter which slot the CSI reporting is configured.
[0079] FIG. 4 illustrates an exemplary schematic diagram of determining a CSI reference resource according to some embodiments of the present disclosure. As shown in FIG. 4, an OCC period k includes slots n, n+1, n+2 and n+3. The slot n is the 1st slot of OCC period k. It is assumed that all the downlink (DL) slots are valid slots. A CSI report is configured in the 2nd slot of the OCC period k, that is slot n+1 of the OCC period k. A CSI reference resource 101 at slot n-k, as introduced with reference to FIG. 3, is not considered in the example of FIG. 4. A configured reporting time of the CSI report is used as a reference to determine the CSI reference resource 302. The configured reporting time of the CSI report may be interchangeably referred to as configuration time of the CSI report in the context. It is required that the time difference T2 between slot n-j and slot n+1 is equal to or higher than a sum of the time offset T-offset and a minimum time tmin. The minimum time tmin is a minimum requirement of computation of a CSI according to current 3GPP specifications. The example of FIG. 4 only considers the CSI report which is to be transmitted on PUCCH in a case that it has no overlapping with PUSCH. Where for periodic and semi-persistent CSI reporting, if a single CSI-RS / SSB resource is configured for channel measurement nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot, or if multiple CSI-RS / SSB resources are configured for channel measurement nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot. For a CSI report with reportQuantity not set to 'ssb-Index-RSRP’ , 'ssb-Index-SINR', 'ssb-Index-RSRP-Index' or 'ssb-Index-SINR-Index' , after the CSI report (re) configuration, serving cell activation, BWP change, or activation of SP-CSI, the UE reports a CSI report only after receiving at least one CSI-RS transmission occasion for channel measurement and CSI-RS and / or CSI-IM occasion for interference measurement no later than CSI reference resource and drops the report otherwise. For a CSI report configuration containing a list of sub-configurations provided by csi-ReportSubConfigList, after the CSI report (re) configuration, serving cell activation, BWP change, or activation of SP-CSI. the UE reports a CSI report including one or more sub-reports only after receiving at least one CSI-RS transmission occasion for channel measurement and CSI-RS and / or CSI-IM occasion for interference measurement, per sub-configuration, no later than CSI reference resource and drops the report otherwise, where the sub-configuration is the activated / triggered one for AP / SP-CSI reporting, or the configured one for P-CSI reporting.
[0080] By the example of FIG. 4, the network device 120 may know the time offset T-offset in advance, such that it is beneficial for the scheduling by the network device 120.
[0081] In the example of FIG. 4, the CSI report is configured in the second slot of the OCC period k. If the time offset T-offset is one PUSCH slot, then the CSI report can be available in the first slot of the OCC period k. In this case, for the CSI report originally configured in the second slot of the OCC period k, it can be available in the first slot of the OCC period k. Therefore, CSI report can be multiplexed with all the PUSCH repetitions within the OCC period.
[0082] In another example, the CSI report may be configured in the third slot of the OCC period k. If the time offset T-offset is two PUSCH slots, then the CSI report can be available in the first slot of the OCC period k. In this case, for the CSI report originally configured in the third slot of the OCC period k, it can be available in the first slot of the OCC period k. Therefore, the CSI report can be multiplexed with all the PUSCH repetitions within the OCC period.
[0083] In another example, the CSI report may be configured in the fourth slot of the OCC period k. If the time offset T-offset is three PUSCH slots, then the CSI report can be available in the first slot of the OCC period k. In this case, for the CSI report originally configured in the fourth slot of the OCC period k, it can be available in the first slot of the OCC period k. Therefore, the CSI report can be multiplexed with all the PUSCH repetitions within the OCC period.
[0084] From the above, it can be seen that if the T-offset is equal to or greater than (occlength -1) UL (that is, PUSCH) slots, then UE is always able to provide a CSI report in the first slot of an OCC period no matter which slot the CSI reporting is configured.
[0085] The embodiments of the present disclosure propose a plurality of ways to configure the time offset T-offset.
[0086] In some embodiments of the present disclosure, a time offset (T-offset) is configured in the OCC configuration, The UE adjusts the CSI reference resource timing by applying a T-offset, resulting in an earlier resource. If the T-offset is equal to or greater than (occlength -1) UL (that is, PUSCH) slots, then UE is always able to provide a CSI report in the first slot of an OCC period no matter which slot the CSI reporting is configured. Here the occlength is the maximum possible OCC length based on the OCC configuration and / or UE capability. In other words, the time offset is higher than or equal to a number of PUSCH slots. The number is occlength minus 1, and the occlength is a maximum applicable OCC length determined based on an OCC configuration from a network device, or capability of the terminal device, or both of them.
[0087] In some embodiments of the present disclosure, the time offset is configured via radio resource control (RRC) signaling or a media access control (MAC) control element.
[0088] In some embodiments of the present disclosure, the T-offset has a default value 1 when OCC length 2 is configured for the UE or the UE capability is with OCC length 2. In other words, the terminal device is configured with an OCC length of 2 PUSCH slots, or capability of the terminal device supports the OCC length of 2 PUSCH slots. Here a default value of the time offset is 1 PUSCH slot.
[0089] In some embodiments of the present disclosure, the T-offset has a default value 3 when OCC length 4 is configured for the UE or the UE capability is with OCC length 4. In other words, the terminal device may be configured with an OCC length of 4 PUSCH slots, or capability of the terminal device supports the OCC length of 4 PUSCH slots. Here, a default value of the time offset is 3 PUSCH slot.
[0090] In some embodiments of the present disclosure, a range of the time offset is from 0 to 3 PUSCH slots. The network device 120 may configure the time offset by a value from this range.
[0091] In some embodiments of the present disclosure, a default value of the time offset is 0. In some alternative embodiments of the present disclosure, a default value of the time offset is a number of PUSCH slots. The number is occlength minus 1, and the occlength is a maximum applicable OCC length determined based on an OCC configuration from a network device, or capability of the terminal device, or both of them.
[0092] In some embodiments of the present disclosure, the time offset is included in an OCC configuration from a network device, or predefined at the terminal device.
[0093] In some embodiments of the present disclosure, the terminal device 110-1 may transmit, to a network device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH. In a case that OCC is configured or enabled for PUSCH repetitions, the terminal device derives the CSI report based on the first CSI reference resource no matter the CSI report is conveyed in PUCCH or in PUSCH.
[0094] In some embodiments of the present disclosure, the terminal device 110-1 guarantees that the CSI report could be available with a time earlier than that in a case that OCC is not configured for PUSCH transmissions, in which the time is equal or greater than T-offset UL (that is, PUSCH) slots.
[0095] In some embodiments of the present disclosure, the terminal device may multiplex the CSI report on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions. The terminal device may transmit the PUSCH repetitions multiplexed with the CSI report.
[0096] In some embodiments of the present disclosure, the terminal device may, in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determine the first CSI reference resource. The terminal device may, in accordance with the PUSCH repetitions with OCC overlapping with the CSI in the OCC period, derive the CSI report based on the first CSI reference resource. The terminal device may, in accordance with the PUSCH repetitions with OCC not overlapping with the CSI in the OCC period, derive the CSI report based on the second CSI reference resource.
[0097] In the context, CSI reference resource (corresponding to a valid DL slot) is a group of time-frequency resources used for the derivation of CSI. In time domain it occupies one DL slot. If the CSI reference resource is left shift, then UE is able to provide a CSI report earlier. In FIG. 4, tmin is for the UE to compute a CSI based on the CSI reference resource.
[0098] When OCC is configured (or enabled) via RRC signaling, CSI reference resource is left shifted by a time offset of occlength -1 UL (PUSCH) slot, so that UE can provide a CSI report in the first slot in any case. The time offset could be configured in OCC configuration, or be pre-defined as (occlength-1) UL (PUSCH) slots, in which occlength is the maximum possible OCC length of the UE for PUSCH repetition transmissions.
[0099] In some embodiments of the present disclosure, in a case that OCC is configured or enabled for PUSCH repetitions, the first CSI reference resource is applied for CSI reporting in both PUCCH and PUSCH.
[0100] By the embodiments of the present disclosure, both specification effort and UE implementation effort are quite small.
[0101] FIG. 5 illustrates a flowchart illustrating another example process for determination of a CSI reference resource when OCC is configured for PUSCH repetitions according to some embodiments of the present disclosure. In FIG. 5, there is detailed signaling workflow to illustrate how the UE reports a CSI report. For the purpose of discussion, the process 500 will be described with reference to FIG. 1A and FIG. 5. The process 400 may involve the terminal device 110-1, and the network device 120 as illustrated in FIG. 1A. It would be appreciated that although the process 500 has been described in the communication network 100 of FIG. 1A, this process may be likewise applied to other communication scenarios where different network devices are communicating with the network device 120.
[0102] At 502, the terminal device 110-1 is configured with OCC operation for PUSCH transmissions, a time-offset (T-offset) is included in the OCC configuration, and the terminal device 110-1 is configured with CSI reporting. In an example, the terminal device 110-1 is with OCC length 4 capability and the T-offset is configured as 3, means 3 UL (PUSCH) slots.
[0103] At 504 and 506, the terminal device 110-1 scheduled to transmit PUSCH repetitions applying an OCC code of a certain length. In an example, at 504, the terminal device 110-1 is scheduled with a grant for PUSCH repetitions with OCC enabled. At 506, the terminal device 110-1 transmits PUSCH repetitions with OCC application based on OCC period.
[0104] At 508, the terminal device 110-1 may determine that PUCCH (CSI report) overlaps in an OCC period.
[0105] At 510, the terminal device 110-1 may determine that the CSI reference resource for a CSI report is with a time earlier than that in a case that OCC is not configured for the PUSCH transmissions, in which the time is equal or greater than time-offset UL (PUSCH) slots.
[0106] At 512-516, The CSI report is multiplexed on each of the PUSCH repetitions of the OCC period and sent to gNB. In an example, at 512, the terminal device 110-1 may derive the CSI report based on the determined CSI reference resource. At 514, the terminal device 110-1 may multiplex the CSI report on each of the PUSCH repetitions of the OCC period. At 516, the terminal device 110-1 may transmit the PUSCH repetitions with the CSI multiplexed.
[0107] FIG. 6 illustrates a flowchart of an example method 600 implemented at a terminal device according to some other embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the terminal device 110-1 with reference to FIG. 1A.
[0108] At block 610, the terminal device 110-1 may determine that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled.
[0109] At block 620, the terminal device 110-1 may determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset. Here the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions.
[0110] At block 630, the terminal device 110-1 may derive the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0111] In some embodiments, the time offset is higher than or equal to a number of PUSCH slots. The number is occlength minus 1, and the occlength is a maximum applicable OCC length determined based on an OCC configuration from a network device, or capability of the terminal device, or both of them.
[0112] In some embodiments, the time offset is configured via radio resource control (RRC) signaling or a media access control (MAC) control element.
[0113] In some embodiments, the terminal device may be configured with an OCC length of 2 PUSCH slots, or capability of the terminal device supports the OCC length of 2 PUSCH slots. A default value of the time offset is 1 PUSCH slot.
[0114] In some embodiments, the terminal device may be configured with an OCC length of 4 PUSCH slots, or capability of the terminal device supports the OCC length of 4 PUSCH slots. A default value of the time offset is 3 PUSCH slot.
[0115] In some embodiments, a range of the time offset is from 0 to 3 PUSCH slots. The network device 120 may configure the time offset by a value from this range.
[0116] In some embodiments, a default value of the time offset is 0. In some embodiments, a default value of the time offset is a number of PUSCH slots. The number is occlength minus 1. The occlength is a maximum applicable OCC length determined based on an OCC configuration from a network device, or capability of the terminal device, or both of them.
[0117] In some embodiments, the time offset is included in an OCC configuration from a network device, or predefined at the terminal device.
[0118] In some embodiments, the terminal device is further caused to: transmit, to a network device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH.
[0119] In some embodiments, the terminal device is further caused to: multiplex the CSI report on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions; and transmit the PUSCH repetitions multiplexed with the CSI report.
[0120] In some embodiments, the terminal device is caused to determine the first CSI reference resource by: in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determine the first CSI reference resource. The terminal device is caused to derive the CSI report by: in accordance with the PUSCH repetitions with OCC overlapping with the CSI in the OCC period, derive the CSI report based on the first CSI reference resource; and in accordance with the PUSCH repetitions with OCC not overlapping with the CSI in the OCC period, derive the CSI report based on the second CSI reference resource.
[0121] FIG. 7 illustrates a flowchart of an example method 700 implemented at a network device according to some other embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the network device 120 with reference to FIG. 1A.
[0122] At block 710, the network device 120 may transmit, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions.
[0123] At block 720, the network device 120 may determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset. Here the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions.
[0124] At block 730, the network device 120 may receive a CSI report from the terminal device.
[0125] In some embodiments, the time offset is higher than or equal to a number of PUSCH slots. The number is occlength minus 1, and the occlength is a maximum applicable OCC length determined based on an OCC configuration from a network device, or capability of the terminal device, or both of them.
[0126] In some embodiments, the network device is further caused to: transmit, to the terminal device, the time offset via radio resource control (RRC) signaling or a media access control (MAC) control element.
[0127] In some embodiments, an OCC length for the PUSCH repetitions with OCC is 2 PUSCH slots, or capability of the terminal device supports the OCC length of 2 PUSCH slots. A default value of the time offset is 1 PUSCH slot.
[0128] In some embodiments, an OCC length for the PUSCH repetitions with OCC is 4 PUSCH slots, or capability of the terminal device supports the OCC length of 4 PUSCH slots. A default value of the time offset is 3 PUSCH slot.
[0129] In some embodiments, a range of the time offset is from 0 to 3 PUSCH slots.
[0130] In some embodiments, a default value of the time offset is 0 or a number of PUSCH slots. The number is occlength minus 1, and the occlength is a maximum applicable OCC length determined based on an OCC configuration from a network device, or capability of the terminal device, or both of them.
[0131] In some embodiments, the time offset is included in an OCC configuration from a network device, or predefined at the network device.
[0132] In some embodiments, the network device is caused to receive the CSI report by: receiving, from the terminal device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH.
[0133] In some embodiments, the network device is further caused to: receive the PUSCH repetitions multiplexed with the CSI report. Here the CSI report is multiplexed on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions.
[0134] In some embodiments, the network device is caused to determine the first CSI reference resource by: in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determine the first CSI reference resource. If the PUSCH repetitions with OCC overlaps with the CSI in the OCC period, the CSI report is based on the first CSI reference resource. If the PUSCH repetitions with OCC do not overlap with the CSI in the OCC period, the CSI report is based on the second CSI reference resource.
[0135] In some embodiments, an apparatus capable of performing any of the method 600 (for example, the terminal device 110-1) may comprise means for performing the respective steps of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0136] In some embodiments, the apparatus may comprises: means for determining that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled; means for determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and means for deriving the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.
[0137] In some embodiments, the apparatus may further comprise means for transmitting, to a network device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH.
[0138] In some embodiments, the apparatus may further comprise means for multiplex the CSI report on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions; and means for transmit the PUSCH repetitions multiplexed with the CSI report.
[0139] In some embodiments, the means for determining the first CSI reference resource may comprise: means for in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determining the first CSI reference resource. The means for deriving the CSI report may comprise: means for in accordance with the PUSCH repetitions with OCC overlapping with the CSI in the OCC period, deriving the CSI report based on the first CSI reference resource; and means for in accordance with the PUSCH repetitions with OCC not overlapping with the CSI in the OCC period, deriving the CSI report based on the second CSI reference resource.
[0140] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 600. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0141] In some embodiments, an apparatus capable of performing any of the method 700 (for example, the network device 120) may comprise means for performing the respective steps of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0142] In some embodiments, the apparatus may comprise: means for transmitting, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions; means for a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; and means for receiving a CSI report from the terminal device.
[0143] In some embodiments, the apparatus may comprise means for transmitting, to the terminal device, the time offset via radio resource control (RRC) signaling or a media access control (MAC) control element.
[0144] In some embodiments, the means for receiving the CSI report may comprise means for receiving, from the terminal device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH.
[0145] In some embodiments, the apparatus may comprise means for receiving the PUSCH repetitions multiplexed with the CSI report, wherein the CSI report is multiplexed on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions.
[0146] In some embodiments, the means for determine the first CSI reference resource may comprise: means for in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determining the first CSI reference resource. If the PUSCH repetitions with OCC overlaps with the CSI in the OCC period, the CSI report is based on the first CSI reference resource. If the PUSCH repetitions with OCC do not overlap with the CSI in the OCC period, the CSI report is based on the second CSI reference resource.
[0147] In some embodiments, the apparatus further comprises means for performing other steps in some embodiments of the method 700. In some embodiments, the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
[0148] FIG. 8 illustrates a simplified block diagram of a device 800 that is suitable for implementing some example embodiments of the present disclosure.
[0149] The device 800 may be provided to implement the communication device, for example the terminal device 110, the network device 120 as shown in FIG. 1A. As shown, the device 800 includes one or more processors 810, one or more memories 820 coupled to the processor 810, and one or more communication modules 840 coupled to the processor 810.
[0150] The communication module 840 is for bidirectional communications. The communication module 840 has at least one antenna to facilitate communication. The communication interface may represent any interface that is necessary for communication with other network elements.
[0151] The processor 810 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 800 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0152] The memory 820 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 824, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random-access memory (RAM) 822 and other volatile memories that will not last in the power-down duration.
[0153] A computer program 830 includes computer executable instructions that are executed by the associated processor 810. The program 830 may be stored in the ROM 824. The processor 810 may perform any suitable actions and processing by loading the program 830 into the RAM 822.
[0154] The embodiments of the present disclosure may be implemented by means of the program 830 so that the device 800 may perform any process of the disclosure as discussed with reference to FIGS. 6 and 7. The embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0155] In some embodiments, the program 830 may be tangibly contained in a computer readable medium which may be included in the device 800 (such as in the memory 820) or other storage devices that are accessible by the device 800. The device 800 may load the program 830 from the computer readable medium to the RAM 822 for execution. The computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
[0156] FIG. 9 illustrates a block diagram of an example of a computer-readable medium 900 in accordance with some example embodiments of the present disclosure.
[0157] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0158] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the methods 600-700 as described above with reference to FIGS. 6 and 7. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0159] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0160] In the context of the present disclosure, the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.
[0161] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. The term “non-transitory, ” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .
[0162] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0163] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A terminal device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to:determine that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled;determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; andderive the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.2.The terminal device of claim 1, wherein the time offset is higher than or equal to a number of PUSCH slots, wherein the number is occlength minus 1, and wherein the occlength is a maximum applicable OCC length determined based on at least one of an OCC configuration from a network device or capability of the terminal device.3.The terminal device of claim 1 or 2, wherein the time offset is configured via radio resource control (RRC) signaling or a media access control (MAC) control element.4.The terminal device of any of claims 1 to 3, wherein the terminal device is configured with an OCC length of 2 PUSCH slots, or capability of the terminal device supports the OCC length of 2 PUSCH slots; andwherein a default value of the time offset is 1 PUSCH slot.5.The terminal device of any of claims 1 to 3, wherein the terminal device is configured with an OCC length of 4 PUSCH slots, or capability of the terminal device supports the OCC length of 4 PUSCH slots, andwherein a default value of the time offset is 3 PUSCH slot.6.The terminal device of any of claims 1 to 3, wherein a range of the time offset is from 0 to 3 PUSCH slots.7.The terminal device of any of claims 1 to 3, wherein a default value of the time offset is 0 or a number of PUSCH slots, wherein the number is occlength minus 1, and wherein the occlength is a maximum applicable OCC length determined based on at least one of an OCC configuration from a network device or capability of the terminal device.8.The terminal device of any of claims 1 to 7, wherein the time offset is included in an OCC configuration from a network device, or predefined at the terminal device.9.The terminal device of any of claims 1 to 8, wherein the terminal device is further caused to:transmit, to a network device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH.10.The terminal device of any of claims 1 to 9, wherein the terminal device is further caused to:multiplex the CSI report on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions; andtransmit the PUSCH repetitions multiplexed with the CSI report.11.The terminal device of any of claims 1 to 10, wherein the terminal device is caused to determine the first CSI reference resource by:in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determine the first CSI reference resource; andwherein the terminal device is caused to derive the CSI report by:in accordance with the PUSCH repetitions with OCC overlapping with the CSI in the OCC period, derive the CSI report based on the first CSI reference resource; andin accordance with the PUSCH repetitions with OCC not overlapping with the CSI in the OCC period, derive the CSI report based on the second CSI reference resource.12.A network device comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to:transmit, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions;determine a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; andreceive a CSI report from the terminal device.13.The network device of claim 12, wherein the time offset is higher than or equal to a number of PUSCH slots, wherein the number is occlength minus 1, and wherein the occlength is a maximum applicable OCC length determined based on at least one of an OCC configuration from a network device or capability of the terminal device.14.The network device of claim 12 or 13, wherein the network device is further caused to:transmit, to the terminal device, the time offset via radio resource control (RRC) signaling or a media access control (MAC) control element.15.The network device of any of claims 12 to 14, wherein an OCC length for the PUSCH repetitions with OCC is 2 PUSCH slots, or capability of the terminal device supports the OCC length of 2 PUSCH slots; andwherein a default value of the time offset is 1 PUSCH slot.16.The network device of any of claims 12 to 14, wherein an OCC length for the PUSCH repetitions with OCC is 4 PUSCH slots, or capability of the terminal device supports the OCC length of 4 PUSCH slots; andwherein a default value of the time offset is 3 PUSCH slot.17.The network device of any of claims 12 to 14, wherein a range of the time offset is from 0 to 3 PUSCH slots.18.The network device of any of claims 12 to 14, wherein a default value of the time offset is 0 or a number of PUSCH slots, wherein the number is occlength minus 1, and wherein the occlength is a maximum applicable OCC length determined based on at least one of an OCC configuration from a network device or capability of the terminal device.19.The network device of any of claims 12 to 18, wherein the time offset is included in an OCC configuration from a network device, or predefined at the network device.20.The network device of any of claims 12 to 19, wherein the network device is caused to receive the CSI report by:receiving, from the terminal device, the CSI report via a physical uplink control channel (PUCCH) or a PUSCH.21.The network device of any of claims 12 to 20, wherein the network device is further caused to:receive the PUSCH repetitions multiplexed with the CSI report, wherein the CSI report is multiplexed on respective repetitions of the PUSCH repetitions in an OCC period for the PUSCH repetitions.22.The network device of any of claims 12 to 21, wherein the network device is caused to determine the first CSI reference resource by:in accordance with the PUSCH repetitions with OCC overlapping with a CSI in an OCC period, determine the first CSI reference resource; andwherein in accordance with the PUSCH repetitions with OCC overlapping with the CSI in the OCC period, the CSI report is based on the first CSI reference resource; and in accordance with the PUSCH repetitions with OCC not overlapping with the CSI in the OCC period, the CSI report is based on the second CSI reference resource.23.A method comprising:determining that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled;determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; andderiving the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.24.A method comprising:transmitting, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions;determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; andreceiving a CSI report from the terminal device.25.An apparatus comprising:means for determining that physical uplink shared channel (PUSCH) repetitions with orthogonal cover code (OCC) are configured or enabled;means for determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; andmeans for deriving the CSI report based on the first CSI reference resource such that the CSI report is available earlier than the configuration time of the CSI report by at least the time offset.26.An apparatus comprising:means for transmitting, to a terminal device, a message for configuring or enabling orthogonal cover code (OCC) for physical uplink shared channel (PUSCH) repetitions;means for determining a first channel state information (CSI) reference resource based on a time offset and one of a second CSI reference resource or a minimum time interval between the second CSI reference resource and a CSI report, such that an available time of the CSI report is earlier than a configuration time of the CSI report by at least the time offset, wherein the second CSI reference resource and the minimum time interval is determined in a case that OCC is not configured or enabled for PUSCH repetitions; andmeans for receiving a CSI report from the terminal device.27.A computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least the method of claim 23 or 24.