Devices and methods for communication
Patent Information
- Application Number
- PCT/CN2025/084795
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-10-01
Smart Images

Figure CN2025084795_01102026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR COMMUNICATIONFIELDS
[0001] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for downlink control information (DCI) .BACKGROUND
[0002] Several technologies have been proposed to improve communication performances. For example, multi-input multi-output (MIMO) has been proposed. MIMO includes features that facilitate utilization of a large number of antenna elements at base station for both sub-6GHz and over-6GHz frequency bands. Enhancement for beam management needs to be further studied.SUMMARY
[0003] In general, embodiments of the present disclosure provide a solution on DCI.
[0004] In a first aspect, there is provided a terminal device. The terminal device comprises: a processor, configured to cause the terminal device to: detect at least one reference signal from a network device; and receive, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0005] In a second aspect, there is provided a network device. The network device comprises: a processor, configured to cause the network device to: transmit at least one reference signal to a terminal device; and transmit, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0006] In a third aspect, there is provided a communication method performed by a terminal device. The method comprises: detecting at least one reference signal from a network device; and receiving, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0007] In a fourth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting at least one reference signal to a terminal device; and transmitting, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0008] In a fifth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the third, or fourth aspect.
[0009] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0011] FIG. 1A to FIG. 1C illustrate example communication environment in which example embodiments of the present disclosure can be implemented;
[0012] FIG. 2 illustrates a signaling flow of DCI monitoring in accordance with some embodiments of the present disclosure;
[0013] FIG. 3A and FIG. 3B illustrate schematic diagrams of DCI monitoring in accordance with some embodiments of the present disclosure, respectively;
[0014] FIG. 4 illustrates a schematic diagram of determining information for a second-stage DCI in accordance with some embodiments of the present disclosure;
[0015] FIG. 5 illustrates a schematic diagram of DCI monitoring in accordance with some embodiments of the present disclosure;
[0016] FIG. 6 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0017] FIG. 7 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure; and
[0018] FIG. 8 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0019] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0020] Principle 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. Embodiments described herein can be implemented in various manners other than the ones described below.
[0021] 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.
[0022] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0023] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0024] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0025] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , FR3 (e.g. 7.125GHz to 24.25 GHz) , (7.125GHz to 24.25 GHz) , (6 GHz to 24.25 GHz) , (71GHz to 114.25 GHz) , (114.25 GHz to 275 GHz) , (110GHz to 170 GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0026] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0027] 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. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0028] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0029] As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0030] In the context of the present application, the terms “uplink channel” , “uplink resource” , “physical uplink control channel (PUCCH) ” , “PUCCH” , “physical uplink shared channel (PUSCH) ” and “uplink control information (UCI) ” are optional examples and applicable in embodiments of the present disclosure. The terms “TCI state” , “set of QCL parameter (s) ” , “QCL parameter (s) ” , “QCL assumption” and “QCL configuration” are optional examples and applicable in embodiments of the present disclosure. The terms “TCI field” , “TCI state field” , and “transmission configuration indicator” are optional examples and applicable in embodiments of the present disclosure. The terms “DCI” and “DCI format” are optional examples and applicable in embodiments of the present disclosure. In some embodiments, the embodiments in this disclosure can be applied to PDSCH and PUSCH scheduling, and in the following, PDSCH scheduling is described as examples. For example, the embodiments in this disclosure can be applied to PUSCH by replacing “transmit” to “receive” and / or “receive” to “transmit” . The terms “PDSCH” and “PUSCH” are optional examples and applicable in embodiments of the present disclosure. The terms “transmit” and “receive” are optional examples and applicable in embodiments of the present disclosure. The terms “precoding matrix” , “precoding” , “precoding information” , “precoder information” , “precoder matrix” , “codebook” , “uplink codebook” , “beam” , “beamforming” and “precoder” are optional examples and applicable in embodiments of the present disclosure. The terms “antenna” , “port” and “antenna port” are optional examples and applicable in embodiments of the present disclosure. The terms “transmission” , “transmitting” , “Tx” and “TX” are optional examples and applicable in embodiments of the present disclosure.
[0031] In the context of the present application, the terms “signaling” , “message” , “configuration” , “request” , “response” , “information” and “signal” , “packet” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “node” , “device” , “apparatus” “function” and “function entity” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “chain” , “Tx chain” , “transmission chain” , “transmit chain” , “transmitting chain” , “Tx” , “transmission” , “transmitting” , “transmit” , “antenna port” , “port” and “antenna” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “precoder” , “precoding” , “precoding matrix” , “precoder information” , “precoder matrix” , “codebook” , “uplink codebook” , “beam” , “beamforming” , “vector” , “basis” , “spatial-related vector” , “spatial-related basis” , “spatial-related basis vector” , “downlink codebook” , “UL codebook” , “spatial domain vector” , “spatial domain-related information” , “SD-related information” , “spatial relation information” , “spatial relation info” , “spatial filter” , “transmission spatial filter” , “transmitting spatial filter” , “spatial Tx filter” , “Tx spatial filter” , “uplink spatial filter” , “spatial domain filter” , “transmission filter” , “ “precoding information and number of layers” , “precoding matrix indicator (PMI) ” , “precoding matrix indicator” , “precoder indication” , “precoding indication” , “transmission precoding matrix indicator” , “precoding matrix indication” , “transmission configuration indicator state (TCI state) ” , “DL TCI state” , “UL TCI state” , “joint TCI state” , “transmission configuration indicator” , “quasi co-location (QCL) ” , “quasi-co-location” , “QCL parameter” , “QCL assumption” , “QCL relationship” and “spatial relation” are optional examples and applicable in embodiments of the present disclosure.
[0032] In the context of the present application, the terms “TCI” , “TCI state” , “uplink TCI state” , “downlink TCI state” , “joint TCI state” , “downlink or joint TCI state” , “spatial domain filter” , “spatial transmission filter” , “spatial transmitting filter” , “spatial reception filter” , “spatial receiving filter” , “spatial relation information” , “spatial relation info” , “spatial domain information” , “spatial filter” , “spatial information” , “set of QCL parameter (s) ” , “QCL parameter (s) ” , “QCL assumption” , “beam” and “QCL configuration” are optional examples and applicable in embodiments of the present disclosure. The terms “TCI field” , “TCI state field” , and “transmission configuration indicator” are optional examples and applicable in embodiments of the present disclosure.
[0033] In the context of the present application, the terms “transmission and reception point (TRP) ” , “TCI” , “panel” , “SRS resource set” , “antenna port group” , “TCI state” , “control resource set, CORESET” , “CORESET pool” , “uplink TCI state” , “downlink TCI state” , “joint TCI state” , “separate TCI state” , “panel” , “SRS resource set” , “antenna port group” and other similar expressions are optional examples and applicable in embodiments of the present disclosure.
[0034] In the context of the present application, the terms “single TRP” , “single TCI state” , “single TCI” , “S-TCI” , “single CORESET” , “single control resource set pool” , “single value of CORESET pool index” , “single CORESET pool index” , “no configuration of CORESET pool index” , “S-TRP” and “S-TCI state” are optional examples and applicable in embodiments of the present disclosure.
[0035] In the context of the present application, the terms “multiple TRPs” , “multiple TCI states” , “multiple CORESETs” and “multiple control resource set pools” , “multi-TRP” , “multi-TCI state” , “multi-TCI” , “multi-CORESET” , “multiple values of CORESET Pool index” , “multiple CORESET Pool indexes” and “multi-control resource set pool” , “MTRP” and “M-TCI” , “M-TPR” are optional examples and applicable in embodiments of the present disclosure.
[0036] In the context of the present application, the terms “uplink precoding granularity” , “precoding granularity” , “precoder granularity” , “uplink precoder granularity” , “uplink (UL) precoding resource block group (PRG) ” , “precoding resource block group” , “PRG” , “physical resource block (PRB) bundling” , “resource block group” , “PRB bundling” , “resource block bundling” are optional examples and applicable in embodiments of the present disclosure.
[0037] In the context of the present application, the terms “synchronization signal (SS) and physical broadcast channel (PBCH) block” , “PBCH block” , “SS / PBCH block” , “synchronization signal block” , “synchronization signal block resource” , “SSB resource” , “SS / PBCH block resource” , “measurement resource” , “antenna port (s) ” , “antenna port (s) for measurement” , “channel state information reference signal” , “RS” , “CSI-RS” , “CSI-RS resource” and “SSB” are optional examples and applicable in embodiments of the present disclosure.
[0038] In the context of the present application, the terms “index” , “indicator” , “indication” , “field” , “bit field” and “bitmap” are optional examples and applicable in embodiments of the present disclosure.
[0039] In the context of the present application, the terms “uplink RS” , “sounding reference signal” , “SRS resource” , “SRS resource set” , “reference signal (RS) ” , “RS resource” and “SRS” are optional examples and applicable in embodiments of the present disclosure.
[0040] In the context of the present application, the terms “uplink channel” and “uplink resource” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “element of indication field” , “parameter” and “indication” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “associated with” , “corresponding to” , “correspond to” and “comprise” are optional examples and applicable in embodiments of the present disclosure.
[0041] In the context of the present application, the terms “identify” , “identity” , “indicator” , “indication” and “ID” are optional examples and applicable in embodiments of the present disclosure.
[0042] In the context of the present application, the terms “frequency domain resource allocation” , “FDRA” , “frequency domain resource assignment” , “resource allocation in frequency domain” , “resource assignment in frequency domain” and “resource block assignment information” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “allocation” and “assignment” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “time domain resource allocation” , “TDRA” , “time domain resource assignment” , “resource allocation in time domain” , “resource assignment in time domain” , “symbols or slots assignment in time domain” and “resource block assignment information” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “allocation” and “assignment” are optional examples and applicable in embodiments of the present disclosure.
[0043] In the context of the present application, the terms “pool” , “set” , “subset” , “group” , “unit” and “subgroup” are optional examples and applicable in embodiments of the present disclosure.
[0044] In the context of the present application, the terms “index” , “indicator” , “indication” , “field” , “bit field” and “bitmap” are optional examples and applicable in embodiments of the present disclosure. The terms “resource block group” , “RBG” , “physical resource block” , “resource block” , “control resource element” , “CCE” , “resource element group” , “REG” , “physical resource block group” , “PRG” , “PRB” and “RB” are optional examples and applicable in embodiments of the present disclosure. The terms “bit size” , “size of bits” , “number of bits” , “size of field” , “bitwidth” and “field size” are optional examples and applicable in embodiments of the present disclosure.
[0045] In the context of the present application, the terms “reporting” , “report” and “feedback” are optional examples and applicable in embodiments of the present disclosure. In the context of the present application, the terms “based on” , “correspond to” , “corresponding to” and “associated with” are optional examples and applicable in embodiments of the present disclosure.
[0046] In the context of the present application, the terms “reference signal” , “RS” , “demodulation reference signal” , “DMRS” , “DMRS antenna port (s) ” , “PDCCH DMRS” , “PDSCH DMRS” , “PUSCH DMRS” , “DMRS for PDSCH” , “DMRS for PUSCH” , “DMRS for PDCCH” , “DMRS associated with PDCCH” , “DMRS of PDCCH” , “DMRS antenna port for PDCCH” , “DMRS antenna port associated with PDCCH” , “DMRS antenna port of PDCCH” , “PDCCH DMRS antenna port” , “DMRS for PDCCH with first-stage DCI” , “DMRS for PDCCH with second-stage DCI” , “DMRS for PDCCH with DCI” and “DMRS for PDCCH with single stage DCI” are optional examples and applicable in embodiments of the present disclosure.
[0047] In the context of the present application, the terms “reference signal” , “RS” , “channel state information reference signal” , “reference signal resource” , “reference signal ports” , “CSI-RS” , “CSI-RS resource” , “SRS resource” , “SRS ports” , “ports” , “antenna ports” , “PUSCH ports” and “SRS” are optional examples and applicable in embodiments of the present disclosure.
[0048] In the context of the present application, the terms “ports” , “antenna ports” , “SRS ports” , “reference signal port” , “reference signal ports” , “port, “antenna port” and “SRS port” are optional examples and applicable in embodiments of the present disclosure.
[0049] In the context of the present application, the terms “element of indication field” , “parameter” and “indication” are optional examples and applicable in embodiments of the present disclosure.
[0050] In the context of the present application, the terms “occasion” , “slot” , “sub-slot” , “symbol” , “a number of symbols” , “subframe” , “frame” and “time interval” are optional examples and applicable in embodiments of the present disclosure.
[0051] In the context of the present application, the terms “physical cell identity” , “PCI” , “cell identity” , “cell ID” , “cell” , “value of cell ID” , “component carrier” , “CC” and “value of PCI” are optional examples and applicable in embodiments of the present disclosure.
[0052] In the context of the present application, the terms “a first cell” , “a serving cell” , “a first value of physical cell identity (PCI) ” , “a first value of PCI” , “a first cell identity” , “a first component carrier” , “a first CC” and “a cell with serving cell PCI” are optional examples and applicable in embodiments of the present disclosure.
[0053] In the context of the present application, the terms “PCI different from the serving cell” , “an additional PCI” , “asecond PCI” , “a second cell” , “a cell different from the serving cell” , “a second value of PCI” , “a second cell identity” , “a second component carrier” , “a second CC” and “a cell with additional PCI” are optional examples and applicable in embodiments of the present disclosure.
[0054] In the context of the present application, the terms “consecutive” and “contiguous” are optional examples and applicable in embodiments of the present disclosure.
[0055] In the context of the present application, the terms “level” , “type” , “part” , “subset” , “step” and “stage” are optional examples and applicable in embodiments of the present disclosure.
[0056] In the context of the present application, the terms “two-level” , “two-type” , “two-part” , “two-subset” , “two-step” and “two-stage” are optional examples and applicable in embodiments of the present disclosure.
[0057] In the context of the present application, the terms “first level DCI” , “first DCI” , “first DCI for at least one group of TCI state (s) indication” , “first DCI for at least one measurement resource (s) indication” , “DCI of first level” , “DCI of first type” , “DCI of first part” , “DCI of first subset” , “DCI of first step” , “DCI of first-stage” , “first type DCI” , “first part DCI” , “first subset of DCI” , “first step DCI” , “first-stage DCI” , “single-stage DCI” , “two-stage DCI” , “first part of two-stage DCI” , “PDCCH with first-stage DCI” , “PDCCH for first-stage DCI” , “PDCCH for at least one DCI” , “PDCCH with at least one DCI” and “first-stage DCI” are optional examples and applicable in embodiments of the present disclosure.
[0058] In the context of the present application, the terms “second level DCI” , “at least one associated DCI ” , “second DCI” , “second DCI for downlink grant” , “second DCI for TCI state indication” , “second DCI for at least one set of TCI states indication” , “second DCI for uplink grant” , “third DCI” , “third DCI for downlink grant” , “third DCI for uplink grant” , “fourth DCI” , “fourth DCI for group information” , “fourth DCI for common information” , “fourth DCI for system information” , “DCI of second level” , “DCI of second type” , “DCI of second part” , “DCI of second subset” , “DCI of second step” , “DCI of second-stage” , “second-stage DCI” , “two-stage DCI” , “PDCCH with second-stage DCI” , “PDCCH for second-stage DCI” , “PDCCH for at least one DCI” , “PDCCH with at least one DCI” , “second part of two-stage DCI” , “second type DCI” , “second part DCI” , “second subset of DCI” , “second step DCI” , “second-stage DCI” , “third level DCI” , “third DCI” , “DCI of third level” , “DCI of third type” , “DCI of third part” , “DCI of third subset” , “DCI of second step” , “DCI of second-stage” , “third type DCI” , “third part DCI” , “third subset of DCI” , “fourth level DCI” , “second level DCI” , “at least one associated DCI ” , “DCI for group information” , “DCI for system information” , “DCI for a group of terminal device” , “DCI of fourth level” , “DCI of fourth type” , “DCI of fourth part” , “DCI of fourth subset” , “DCI of fourth step” , “fourth type DCI” , “fourth part DCI” and “fourth subset of DCI” are optional examples and applicable in embodiments of the present disclosure.
[0059] In the context of the present application, the terms “pseudo random sequence” , “pseudo noise sequence” , “pseudo random” and “pseudo noise” are optional examples and applicable in embodiments of the present disclosure.
[0060] In the context of the present application, the terms “from” , “after” , “begin at” , “beginning” , “begin from” , “starting from” , “later than” and “no earlier than” are optional examples and applicable in embodiments of the present disclosure.
[0061] In the context of the present application, the terms “first time and frequency resource” , “third group of time and frequency resources” , “first PDCCH” , “first search space” , “first search space set” , “first CORESET” , “first group of CORESET (s) ” , “time and frequency resource associated with a first type” , “a group of time and frequency resources associated with a first type” , “CORESET associated with a first type” , “search space associated with a first type” , “search space set associated with a first type” and “PDCCH associated with a first type” are optional examples and applicable in embodiments of the present disclosure.
[0062] In the context of the present application, the terms “second time and frequency resource” , “first group of time and frequency resources” , “second group of time and frequency resources” , “fourth group of time and frequency resources” , “second PDCCH” , “second search space” , “second search space set” , “second CORESET” , “second group of CORESET (s) ” , “time and frequency resource associated with a second type” , “a group of time and frequency resources associated with a second type” , “CORESET associated with a second type” , “search space associated with a second type” , “search space set associated with a second type” and “PDCCH associated with a second type” are optional examples and applicable in embodiments of the present disclosure.
[0063] In the context of the present application, the terms “third time and frequency resource” , “second group of time and frequency resources” , “fourth group of time and frequency resources” , “third PDCCH” , “third search space” , “third search space set” , “third CORESET” , “third group of CORESET (s) ” , “time and frequency resource associated with a third type” , “a group of time and frequency resources associated with a third type” , “CORESET associated with a third type” , “search space associated with a third type” , “search space set associated with a third type” and “PDCCH associated with a third type” are optional examples and applicable in embodiments of the present disclosure.
[0064] In the context of the present application, the terms “physical uplink shared channel” , “PUSCH resource” , “PUSCH” , “uplink shared channel” , “ULSCH” and “UL-SCH” are optional examples and applicable in embodiments of the present disclosure.
[0065] In the context of the present application, the terms “PDCCH candidate” , “PDCCH monitoring” , “PDCCH reception” , “PDCCH monitoring occasion” and “PDCCH” are optional examples and applicable in embodiments of the present disclosure.
[0066] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0067] FIG. 1A, FIG. 1B and FIG. 1C illustrate schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices, including a terminal device 110 and a network device 120, can communicate with each other.
[0068] In the example of FIG. 1A, FIG. 1B or FIG. 1C, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE. The serving area of the network device 120 may be called a cell 101 and / or a cell 102.
[0069] As shown in FIG. 1B, the network device 120 may communicate with the terminal device 110 via at least one of the TRPs / panels 130-1, 130-2, 130-3 and 130-4. In the following text, the TRP / panel 130-1 may be also referred to as the first TRP / panel, the TRP / panel 130-2 may be also referred to as the second TRP / panel, the TRP / panel 130-3 may be also referred to as the third TRP / panel and the TRP / panel 130-4 may be also referred to as the fourth TRP / panel. Each of the TRPs / panels 130 may provide a plurality of beams for communication with the terminal device 110. It is noted that the number of TRPs / panels shown in FIG. 1B is only an example not limitation.
[0070] For example, the network device 120 may be configured with at least one of four TRPs / panels 130-1, 130-2, 130-3 and 130-4 (collectively referred to as TRPs 130 or individually referred to as TRP 130) . It is to be understood that the number of network devices, terminal devices and TRPs as shown in FIG. 1B is only for the purpose of illustration without suggesting any limitations to the present disclosure. The network 100 may include any suitable number of devices adapted for implementing embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 101 and / or the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be other device than a terminal device. The term “TRP” refers to an antenna array (with one or more antenna elements) available to the network device located at a specific geographical location. For example, a network device may be coupled with multiple TRPs in different geographical locations to achieve better coverage. For another example, a network device may be implemented with multiple panels or multiple groups of antenna ports / elements in same geographical location. It is to be understood that the TRP can also be referred to as a “panel” , which also refers to an antenna array (with one or more antenna elements) or a group of antennas.
[0071] In the specific example of communication environment 100, a link or a direction from the terminal device 110 to the network device 120 is referred to as uplink, while a link or a direction from the network device 120 to the terminal device 110 is referred to as a downlink. Further, MIMO is supported in the communication environment 100. For example, the network device 120 and the terminal device 110 may communicate with each other via different beams to enable a directional communication. For another example, the network device 120 and the terminal device 110 may communicate with each other based on a plurality of antenna ports and / or a plurality of beams and / or a plurality of TCI states (e.g. a plurality of downlink TCI states and / or a plurality of joint TCI states and / or a plurality of uplink TCI states) . In downlink, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In downlink, the network device 120 may transmit downlink transmission to the terminal device 110 via one or more beams or one or more TCI states (or downlink TCI states or joint TCI states) . For example, as illustrated in FIG. 1C, the network device 120 transmits downlink transmission to the terminal device 110 via a plurality of beams and / or a plurality of TCI states (e.g. a plurality of downlink TCI states and / or a plurality of joint TCI states) . Correspondingly, in uplink, the network device 120 is a RX device (or a receiver) and the terminal device 110 is a TX device (or a transmitter) . In uplink, the terminal device 110 may transmit uplink transmission to the network device 120 via one or more beams or one or more TCI states (or uplink TCI states or joint TCI states) . For example, as illustrated in FIG. 1C, the terminal device 110 transmits uplink transmission to the network device 120 via a plurality of beams and / or a plurality of TCI states (e.g. a plurality of uplink TCI states and / or a plurality of joint TCI states) .
[0072] It is to be understood that the number of devices and their connections shown in FIG. 1A, FIG. 1B or FIG. 1C are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 101 and / or the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be other device than a terminal device.
[0073] In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0074] In some example embodiments, if the terminal device 110 is a terminal device or a UE and the network device 120 is a network device or a gNB or a base station, a link or a direction from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a link or a direction from the terminal device 110 to the network device 120 is referred to as an uplink (UL) . In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
[0075] In some embodiments, the terminal device 110 and the network device 120 may communicate with each other via a channel such as a wireless communication channel on an air interface (e.g., Uu interface) . The wireless communication channel may comprise a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , a physical random-access channel (PRACH) , a physical downlink control channel (PDCCH) , a physical downlink shared channel (PDSCH) and a physical broadcast channel (PBCH) . Of course, any other suitable channels are also feasible.
[0076] The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0077] In addition to normal data communications, the network device 120 may send a RS to the terminal device 110 in a downlink (DL) . Similarly, the terminal device 110 may transmit a RS to the network device 120 in an uplink (UL) . Generally speaking, a RS is a signal sequence (also referred to as “RS sequence” ) that is known by both the network device 120 and the terminal devices 110. For example, a RS sequence may be generated and transmitted by the network device 120 based on a certain rule and the terminal device 110 may deduce the RS sequence based on the same rule. For another example, a RS sequence may be generated and transmitted by the terminal device 110 based on a certain rule and the network device 120 may deduce the RS sequence based on the same rule. Examples of the RS may include but are not limited to downlink or uplink Demodulation Reference Signal (DMRS) , CSI-RS, Sounding Reference Signal (SRS) , Phase Tracking Reference Signal (PTRS) , Tracking Reference Signal (TRS) , fine time-frequency Tracking Reference Signal (TRS) , CSI-RS for tracking, Positioning Reference Signal (PRS) and so on.
[0078] In the context of the present disclosure, some example embodiments are discussed by using cell (s) . However, the solution discussed herein may be applied to scenarios related to component carrier (s) (CC(s) ) , bandwidth part (s) (BWP (s) ) and / or event (s) . That is, all the embodiments discussed with regards to cell (s) are applicable to the scenarios related to CC (s) , BWP (s) , event (s) . Merely for brevity, the same or similar contents are omitted herein.
[0079] As used herein, beam refers to at least one of: an RS (e.g., CSI-RS, SSB, SRS, an RS resource, TCI state, or RS of a QCL type (e.g., typeA, typeB, typeC, typeD) , QCL parameters, pathloss reference RS, uplink power control (parameter) ; Beam ID refers to CRI or SSBRI, TCI state ID, pathloss reference RS ID, or uplink power control ID.
[0080] In some embodiments, one DCI may be applied to indicate multiple precoders (e.g. for multiple subbands) , the number of precoder indication fields may be fixed (or configured by RRC) , and the number of subbands for one transmission may depend on frequency domain resource allocation (e.g. dynamically) .
[0081] The network device 120 may communicate data and control information to the terminal device 110 via a plurality of beams (also referred to as “DL beams” ) or based on at least one TCI state. For example, the at least one TCI state may be downlink TCI state or joint TCI state or downlink-Or-Joint-TCI-State (or represented as downlink or joint TCI state) . The terminal device 110 may also communicate data and control information to the network device 120 via a plurality of beams (also referred to as “UL beams” ) or based on at least one spatial relation information or based on at least one TCI state. For example, the at least one TCI state may be uplink TCI state or joint TCI state or downlink-Or-Joint-TCI-State. In some example embodiments, a beam is also defined and indicated by parameters of a transmission configuration indicator. For example, there may be a transmission configuration indicator (TCI) field in DCI. A value of the TCI field may be referred to as a “TCI codepoint” . In some embodiments, a TCI codepoint may indicate or comprise one or more TCI states. For example, one TCI codepoint may indicate one or two downlink TCI states. For another example, one TCI codepoint may indicate one or two uplink TCI states. For another example, one TCI codepoint may indicate one or two joint TCI states. For another example, one TCI codepoint may indicate one or two downlink or joint TCI states. For another example, one TCI codepoint may indicate one or two downlink TCI states and one or two uplink TCI states. For another example, one TCI codepoint may indicate one or two downlink or joint TCI states and one or two uplink TCI states. In some embodiments, each TCI state contains or comprises parameters for configuring a quasi co-location (QCL) relationship between one or two DL reference signals and / or one or two UL reference signals and at least one of: the DMRS ports of the PDSCH, the DMRS ports of PDCCH, the DMRS ports of PUSCH, the DMRS ports of PUCCH, the SRS ports of a SRS resource or the CSI-RS ports of a CSI-RS resource.
[0082] In addition, in the following description, some interactions are performed among the terminal device 110 and the network device 120 (such as, exchanging configuration (s) and so on) . It is to be understood that the interactions may be implemented either in one single signaling / message / configuration or multiple signaling / messages / configurations, including at least one of system information, radio resource control (RRC) message, downlink control information (DCI) message, uplink control information (UCI) message, media access control (MAC) control element (CE) and so on. The present disclosure is not limited in this regard.
[0083] Reference is made to FIG. 2, which illustrates a signaling flow 200 of measurement report in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 200 will be discussed with reference to FIG. 1A to FIG. 1C, for example, by using the terminal device 110 and the network device 120.
[0084] The network device 120 transmits (2010) at least one reference signal to the terminal device 110. The terminal device 110 detects (2015) the at least one reference signal from the network device 120. For example, the terminal device 110 may receive or detect the at least one reference signal for detection of at least one PDCCH, which may implicitly indicate at least one information for at least one DCI.
[0085] The network device 120 transmits (2020) at least one DCI to the terminal device 110. The terminal device 110 detects or receives (2020) PDCCH or at least one DCI (or the terminal device 110 monitors at least one PDCCH (e.g. the at least one PDCCH may with at least one DCI) based on the detection or reception of the at least one reference signal. For example, the terminal device 110 may detect or receive the at least one DCI by monitoring at least one PDCCH. In some embodiments, the at least one DCI may comprise one or more of: a single-stage DCI, a two-stage DCI, a first-stage DCI, or a second-stage DCI. In this way, the terminal device may detect the at least one RS (e.g. with reduced complexity) to determine information for detection of at least one DCI, also beneficial for MU-MIMO for PDCCH.
[0086] In some embodiments, the at least one reference signal may be associated with at least one PDCCH and / or at least one DCI. In some embodiments, the at least one DCI may be in the at least one PDCCH. In some embodiments, monitoring or detecting or receiving the at least one PDCCH may be associated with the at least one reference signal. In some embodiments, monitoring or detecting or receiving the at least one DCI may be associated with the at least one reference signal. In some embodiments, the terminal device may monitor or detect or receive the at least one PDCCH or the at least one DCI based on the at least one reference signal. In some embodiments, the at least one PDCCH and / or the at least one DCI may be followed or associated with or based on the at least one reference signal.
[0087] In some embodiments, the at least one reference signal may be associated with first information for the at least one DCI. In some embodiments, the first information may be associated with (or the first information may comprise) one or more of: a determination of an existence of the at least one DCI, existence or not of the at least one DCI, existence or not of at least one PDCCH (e.g. for the terminal device) , existence or not of a first-stage DCI (e.g. for the terminal device) , existence or not of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence or not of a single-stage DCI (e.g. for the terminal device) , existence or not of a two-stage DCI (e.g. for the terminal device) , a determination of monitoring the at least one DCI in a first duration, monitoring or not of the at least one DCI (or at least one PDCCH) in a first duration, a determination of an existence of demodulation reference signal, DMRS, for physical downlink control channel, PDCCH, for the at least one DCI, existence or not of DMRS for PDCCH for the at least one DCI, a determination of a type of DMRS pattern for PDCCH for the at least one DCI, indication of a type of DMRS pattern for PDCCH for the at least one DCI, a determination of a time domain resource density of DMRS for PDCCH for the at least one DCI, indication of a time domain resource density of DMRS for PDCCH for the at least one DCI, a determination of a frequency domain resource density of DMRS for PDCCH for the at least one DCI, indication of a frequency domain resource density of DMRS for PDCCH for the at least one DCI, a determining of skipping monitoring of the at least one DCI in the first duration, skipping monitoring or not of the at least one DCI (or at least one PDCCH) in the first duration, a determination of an identity of a control resource set, CORESET, an identity (or an ID) of a CORESET (e.g. for the at least one PDCCH or at least one DCI) , a determination of CORESET pool index, indication (or value) of CORESET pool index, a determination of an index of a group of CORESETs, an index (or a value or an indication) of a group of CORESETs, a determination of DCI format for the at least one DCI, indication of DCI format for the at least one DCI, a determination of search space set index, indication of search space set index, index of search space set, a determination of an index of PDCCH candidate, an index of PDCCH candidate, indication of an index of PDCCH candidate, a determination of an index of group of PDCCH candidates, indication of an index of group of PDCCH candidates, an index of group of PDCCH candidates, a determination of a value of aggregation level, a value of aggregation level (e.g. for the at least one DCI or at least one PDCCH) , a determination of a value of the first duration, a value of the first duration, a determination of an index of starting control channel element (CCE) for monitoring PDCCH for the at least one DCI, an index of starting CCE for monitoring at least one PDCCH (e.g. for the at least one DCI) , indication of an index of starting CCE for monitoring at least one PDCCH (e.g. for the at least one DCI) , index (es) of CCE (s) for monitoring at least one PDCCH (e.g. for the at least one DCI) , indication of index (es) of CCE (s) for monitoring at least one PDCCH (e.g. for the at least one DCI) , a determination of payload size for a first-stage DCI or for a single-stage DCI, indication of payload size for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) or a single-stage DCI, a determination of first-stage or single-stage DCI, a determination of confirmation of measurement report triggered by the terminal device, confirmation of measurement report triggered by the terminal device, existence or not of at least one field in the at least one DCI (or in the associated DCI or in the first-stage DCI) , a determination of an existence of at least one field in the first-stage DCI, or a determination of reference timing for monitoring occasion (e.g. for at least one PDCCH) . In some embodiments, the first information may be associated with or may comprise or may be applied for determination of one or more of: existence or not of at least one DCI (or at least one PDCCH) , existence or not of the at least one DCI, existence or not of at least one PDCCH (e.g. for the terminal device) , existence or not of a first-stage DCI (e.g. for the terminal device) , existence or not of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence or not of a single-stage DCI (e.g. for the terminal device) , existence or not of a two-stage DCI (e.g. for the terminal device) , monitoring or not of the at least one DCI (or at least one PDCCH) in a first duration, existence or not for DMRS for at least one PDCCH, DMRS pattern for DMRS for at least one PDCCH, time domain resource density for DMRS for at least one PDCCH, or frequency domain resource density for DMRS for at least one PDCCH (or existence or not or pattern or time domain resource density or frequency domain resource density for the DMRS on PDCCH symbol (s) , e.g. DMRS multiplexed (e.g. frequency domain multiplexed (FDMed) ) with at least one PDCCH) , skip monitoring or not of the at least one DCI (or at least one PDCCH) in the first duration, CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , CORESETPoolIndex, index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , DCI format for the at least one DCI, search space set index (e.g. for the at least one PDCCH or at least one DCI) , index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , value of first duration, index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , payload size (or interpretation type) for the first-stage DCI, payload size (or interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) or a single-stage DCI, indication of first-stage DCI (or two-stage DCI) or single-stage DCI, confirmation of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , existence or not of at least one field in the first-stage DCI (or in the at least one DCI) , or reference timing for monitoring occasion (e.g. for at least one PDCCH) .
[0088] In some embodiments, the first duration may be a first number of slots (or a first number of symbols) . In some embodiments, the first duration may be starting from the slot comprising the at least one RS or may be after the slot comprising the at least one RS. In some embodiments, the first number may be represented as Sf. In some embodiments, Sf may be positive integer. In some embodiments, 1≤Sf≤1024. In some embodiments, Sf may be one or more of: {1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 32, 64, 128, 256, 512, 1024, infinity} .
[0089] In some embodiments, the network device 120 transmits at least one configuration to the terminal device 110. In some embodiments, the terminal device 110 may receive the at least one configuration from the network device 120. In some embodiments, the at least one configuration may comprise one or more of: at least one configuration for time domain resource associated with the at least one reference signal, at least one configuration for frequency domain resource associated with the at least one reference signal, at least one configuration for time domain resource associated with the at least one DCI (or the at least one PDCCH) , at least one configuration for frequency domain resource associated with the at least one DCI (or the at least one PDCCH) , at least one configuration for time domain resource associated with a first-stage DCI (or PDCCH with the first-stage DCI) , at least one configuration for frequency domain resource associated with the first-stage DCI (or PDCCH with the first-stage DCI) , at least one configuration for time domain resource associated with a second-stage DCI (or PDCCH with the second-stage DCI) , or at least one configuration for frequency domain resource associated with the second-stage DCI (or PDCCH with the second-stage DCI) . In some embodiments, the at least one configuration may comprise one or more of: at least one configuration for time domain resource and / or frequency domain resource associated with the at least one RS, at least one configuration for time domain resource and / or frequency domain resource associated with the at least one DCI (e.g. represented as first CORESET) , at least one configuration for time domain resource and / or frequency domain resource associated with the first-stage DCI (or PDCCH with the first-stage DCI) (e.g. represented as first CORESET) , at least one configuration for time domain resource and / or frequency domain resource associated with the second-stage DCI (or PDCCH with the second-stage DCI) (e.g. represented as second CORESET) .
[0090] In some embodiments, the at least one PDCCH (e.g. for the at least one DCI or for two-stage DCI or for first-stage DCI or for second-stage DCI) and / or the at least one DCI may be associated with or may be in one or more of: a first CORESET, a first search space set, a first group of PDCCH candidates, a second CORESET, a second search space set, a second group of PDCCH candidates, a third CORESET, a third search space set or a third group of PDCCH candidates. In some embodiments, at least one PDCCH for a first-stage DCI may be associated with or may be in one or more of: a first CORESET, a first search space set or a first group of PDCCH candidates. In some embodiments, at least one PDCCH for a second-stage DCI may be associated with or may be in one or more of: a second CORESET, a second search space set or a second group of PDCCH candidates. In some embodiments, the first CORESET may be associated with or linked with the second CORESET. For example, the first CORESET and the second CORESET may be configured with a same value of linking ID.
[0091] In some embodiments, the first search space set may be associated with or linked with the second search space set. For example, the first search space set and the second search space set may be configured with a same value of linking ID. In some embodiments, the first search space set and the second search space set may be associated with a same CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) . In some embodiments, the first search space set may be associated with the first CORESET. In some embodiments, the second search space set may be associated with the second CORESET.
[0092] In some embodiments, the first group of PDCCH candidates may be associated with or linked with the second group of PDCCH candidates. For example, the first group of PDCCH candidates and the second group of PDCCH candidates may be configured with a same value of linking ID. In some embodiments, the first group of PDCCH candidates and the second group of PDCCH candidates may be associated with a same CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) . In some embodiments, the first group of PDCCH candidates and the second group of PDCCH candidates may be associated with a same search space set (e.g. the first search space set or the second search space set or the third search space set) . In some embodiments, the first group of PDCCH candidates may be associated with the first CORESET. In some embodiments, the first group of PDCCH candidates may be associated with the first search space set. In some embodiments, the second group of PDCCH candidates may be associated with the second CORESET. In some embodiments, the second group of PDCCH candidates may be associated with the second search space set.
[0093] In some embodiments, the at least one configuration for time domain resource associated with the at least one reference signal may comprise one or more of: a first set of symbols (e.g. the number of symbols in the first set of symbols may be represented as SRS) for the at least one reference signal, index (es) (e.g. represented as iRS) of the first set of symbols (e.g. within a slot) for the at least one reference signal, an index of starting symbol (e.g. represented as iRS, 1) of the first set of symbols (e.g. within a slot) for the at least one reference signal, an index of ending symbol (e.g. represented as iRS, 2) of the first set of symbols (e.g. within a slot) for the at least one reference signal, periodicity and / or slot offset (or symbol offset) for the at least one reference signal. In some embodiments, SRS may be positive integer. In some embodiments, 1≤SRS≤14. In some embodiments, SRS may be one or more of: {1, 2, 3} . In some embodiments, SRS may be 1. In some embodiments, iRS may be integer. In some embodiments, 0≤iRS≤13 or 0≤iRS≤3. In some embodiments, iRS may be 0 or 1. In some embodiments, iRS, 1 may be integer. In some embodiments, 0≤iRS, 1≤13 or 0≤iRS, 1≤3 or 0≤iRS, 1≤13-SRS. In some embodiments, iRS, 1 may be 0 or 1. In some embodiments, iRS, 2 may be integer. In some embodiments, 0≤iRS, 2≤13 or 0≤iRS, 2≤3 or iRS, 1+SRS≤iRS, 2≤13. In some embodiments, iRS, 2 may be iRS, 1+SRS.
[0094] In some embodiments, the at least one configuration for frequency domain resource associated with the at least one reference signal may comprise one or more of: a first set of resource blocks (RBs) (or resource block groups or resource element groups (REGs) or CCEs) , an index of starting RB (or CCE or REG) of the first set of RBs (or first set of CCEs or first set of REGs) , an index of ending RB (or CCE or REG) of the first set of RBs (or first set of CCEs or first set of REGs) , an index of starting REG (or CCE) of the first set of REGs (or first set of CCEs or first set of REGs) , an index of ending REG (or CCE) of the first set of REGs (or first set of CCEs or first set of REGs) . In some embodiments, the number of RBs (or CCEs or REGs or RBGs) in the first set of RBs (or CCEs or REGs or RBGs) may be represented as NRS. In some embodiments, NRS may be positive integer. In some embodiments, 1≤NRS≤170 or 1≤NRS≤275 or 1≤NRS≤46. In some embodiments, the unit for the at least one RS in frequency domain (or the unit for the first set of RBs (or CCEs or REGs or RBGs) ) may be URS RBs (or CCEs or REGs or RBGs) . In some embodiments, URS may be positive integer. In some embodiments, URSmay be 2, 3, 4, 6 (e.g. RBs) . In some embodiments, NRS may be integer multiple of URS.
[0095] In some embodiments, a control-resource set (CORESET) (e.g. the first CORESET or the second CORESET or the third CORESET) may consist of resource blocks (RBs) in the frequency domain. In some embodiments, a CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) may consist of symbols in the time domain.
[0096] In some embodiments, a control-channel element (CCE) may consist of 6 resource-element groups (REGs) . In some embodiments, a REG may equal to (or may comprise) one resource block (e.g. during one orthogonal frequency-division multiplexing (OFDM) symbol) . In some embodiments, REGs within a CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) may be numbered in increasing order in a time-first manner, starting with 0 for the first OFDM symbol and the lowest-numbered resource block in the CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) .
[0097] In some embodiments, one CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) may be associated with one or more search space sets. In some embodiments, one search space set may include or may be associated with one or more PDCCH candidates. In some embodiments, PDCCH monitoring periodicity and / or slot offset and / or symbol index within a slot may be configured per search space set. In some embodiments, one CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) and / or one search space set (e.g. the first search space set or the second search space set or the third search space set) may comprise a plurality of CCEs or RBs. In some embodiments, the number of plurality of CCEs may be NCCE. In some embodiments, NCCE may be positive integer. In some embodiments, 1≤NCCE≤45 or 1≤NCCE≤46. In some embodiments, each CCE in the plurality of CCEs may have an index numbered, for example, from 0 to NCCE-1. For example, one PDCCH candidate may correspond to a search space.
[0098] In some embodiments, a PDCCH channel may consist of one or more control channel elements (CCEs) . In some embodiments, the supported PDCCH aggregation levels may be 1, 2, 4, 8, and 16. In some embodiments, when the aggregation level is 1, the PDCCH channel consists of 1 CCE. In some embodiments, when the aggregation level is 2, the PDCCH channel consists of 2 CCEs. In some embodiments, when the aggregation level is 4, the PDCCH channel consists of 4 CCEs. In some embodiments, when the aggregation level is 8, the PDCCH channel consists of 8 CCEs. In some embodiments, when the aggregation level is 16, the PDCCH channel consists of 16 CCEs.
[0099] In some embodiments, a terminal device (e.g., a user equipment (UE) ) may be configured with multiple control-resource sets (i.e. CORESET) . Each control-resource set is associated with one CCE-to-REG mapping only.
[0100] In some embodiments, the at least one configuration for time domain resource associated with a first-stage DCI (or PDCCH with the first-stage DCI) or associated with the first CORESET (or the first search space set or the first group of PDCCH candidates) may comprise (or may consist of) one or more of:a second set of symbols (e.g. the number of symbols in the second set of symbols may be represented as S1) , index (es) (e.g. represented as is1) of the second set of symbols (e.g. within a slot) , an index of starting symbol (e.g. represented as is1, 1) of the second set of symbols (e.g. within a slot) , an index of ending symbol (e.g. represented as is1, 2) of the second set of symbols (e.g. within a slot) , periodicity and / or slot offset (or symbol offset) for the first CORESET (or the first search space set or the first group of PDCCH candidates) . In some embodiments, S1 may be positive integer. In some embodiments, 1≤S1≤4 or 1≤S1≤3. In some embodiments, S1 may be one or more of: {1, 2, 3} . In some embodiments, is1 may be integer. In some embodiments, 0≤is1≤13 or 0≤is1≤3. In some embodiments, is1 may be 0 or 1. In some embodiments, is1, 1 may be integer. In some embodiments, 0≤is1, 1≤13 or 0≤is1, 1≤3 or 0≤is1, 1≤13-S1. In some embodiments, is1, 1 may be 0 or 1. In some embodiments, is1, 2 may be integer. In some embodiments, 0≤is1, 2≤13 or 0≤is1, 2≤3 or is1, 1+S1≤is1, 2≤13. In some embodiments, is1, 2 may be is1, 1+S1.
[0101] In some embodiments, the at least one configuration for frequency domain resource associated with a first-stage DCI (or PDCCH with the first-stage DCI) or associated with the first CORESET (or the first search space set or the first group of PDCCH candidates) may comprise (or may consist of) a second set of CCEs (or RBs or RBGs or REGs) (e.g. represented as NCCE, 1) . In some embodiments, NCCE, 1 may be positive integer. In some embodiments, 1≤NCCE, 1≤45 or 1≤NCCE, 1≤46 (e.g. in case of S1=1) or 1≤NCCE, 1≤90 or 1≤NCCE, 1≤92 (e.g. in case of S1=2) or 1≤NCCE, 1≤135 or 1≤NCCE, 1≤138 (e.g. in case of S1=3) or 1≤NCCE, 1≤270 or 1≤NCCE, 1≤275 (e.g. in case of S1=1) or 1≤NCCE, 1≤540 or 1≤NCCE, 1≤550 (e.g. in case of S1=2) or 1≤NCCE, 1≤810 or 1≤NCCE, 1≤825 (e.g. in case of S1=3) .
[0102] In some embodiments, the at least one configuration for time domain resource associated with a second-stage DCI (or PDCCH with the second-stage DCI) or associated with the second CORESET (or the second search space set or the second group of PDCCH candidates) may comprise (or may consist of) one or more of: a third set of symbols (e.g. the number of symbols in the third set of symbols may be represented as S2) , index (es) (e.g. represented as is2) of the third set of symbols (e.g. within a slot) , an index of starting symbol (e.g. represented as is2, 1) of the third set of symbols (e.g. within a slot) , an index of ending symbol (e.g. represented as is2, 2) of the third set of symbols (e.g. within a slot) , periodicity and / or slot offset (or symbol offset) for the second CORESET (or the second search space set or the second group of PDCCH candidates) . In some embodiments, S2 may be positive integer. In some embodiments, 1≤S2≤4 or 1≤S2≤3. In some embodiments, S2 may be one or more of: {1, 2, 3} . In some embodiments, is2 may be integer. In some embodiments, 0≤is2≤13 or 0≤is2≤3. In some embodiments, is2 may be 0 or 1. In some embodiments, is2, 1 may be integer. In some embodiments, 0≤is2, 1≤13 or 0≤is2, 1≤3 or 0≤is2, 1≤13-S2. In some embodiments, is2, 1 may be 0 or 1. In some embodiments, is2, 2 may be integer. In some embodiments, 0≤is2, 2≤13 or 0≤is2, 2≤3 or is2, 1+S2≤is2, 2≤13. In some embodiments, is2, 2 may be is2, 1+S2.
[0103] In some embodiments, the at least one configuration for frequency domain resource associated with a second-stage DCI (or PDCCH with the second-stage DCI) or associated with the second CORESET (or the second search space set or the second group of PDCCH candidates) may comprise (or may consist of) a third set of CCEs (or RBs or RBGs or REGs) (e.g. represented as NCCE, 2) . In some embodiments, NCCE, 2 may be positive integer. In some embodiments, 1≤NCCE, 2≤45 or 1≤NCCE, 2≤46 (e.g. in case of S2=1) or 1≤NCCE, 2≤90 or 1≤NCCE, 2≤92 (e.g. in case of S2=2) or 1≤NCCE, 2≤135 or 1≤NCCE, 2≤138 (e.g. in case of S2=3) or 1≤NCCE, 2≤270 or 1≤NCCE, 2≤275 (e.g. in case of S2=1) or 1≤NCCE, 2≤540 or 1≤NCCE, 2≤550 (e.g. in case of S2=2) or 1≤NCCE, 2≤810 or 1≤NCCE, 2≤825 (e.g. in case of S2=3) .
[0104] In some embodiments, the at least one configuration for time domain resource associated with the at least one DCI (or two-stage DCI or first-stage DCI and / or second-stage DCI or single-stage DCI) (or at least one PDCCH with the at least one DCI) or associated with the third CORESET (or the third search space set or the third group of PDCCH candidates) may comprise (or may consist of) one or more of: a fourth set of symbols (e.g. the number of symbols in the fourth set of symbols may be represented as S3) , index (es) (e.g. represented as is3) of the fourth set of symbols (e.g. within a slot) , an index of starting symbol (e.g. represented as is3, 1) of the fourth set of symbols (e.g. within a slot) , an index of ending symbol (e.g. represented as is3, 2) of the fourth set of symbols (e.g. within a slot) , periodicity and / or slot offset (or symbol offset) for the third CORESET (or the third search space set or the third group of PDCCH candidates) . In some embodiments, S3 may be positive integer. In some embodiments, 1≤S3≤4 or 1≤S3≤3. In some embodiments, S3 may be one or more of: {2, 3, 4} . In some embodiments, is3 may be integer. In some embodiments, 0≤is3≤13 or 0≤is3≤3. In some embodiments, is2 may be 0 or 1 or 2 or 3. In some embodiments, is3, 1 may be integer. In some embodiments, 0≤is3, 1≤13 or 0≤is3, 1≤3 or 0≤is3, 1≤13-S3. In some embodiments, is3, 1 may be 0 or 1 or 2 or 3. In some embodiments, is3, 2 may be integer. In some embodiments, 0≤is3, 2≤13 or 0≤is3, 2≤3 or is3, 1+S3≤is3, 2≤13. In some embodiments, is3, 2 may be is3, 1+S3.
[0105] In some embodiments, the at least one configuration for frequency domain resource associated with the at least one DCI (or two-stage DCI or first-stage DCI and / or second-stage DCI or single-stage DCI) (or at least one PDCCH with the at least one DCI) or associated with the third CORESET (or the third search space set or the third group of PDCCH candidates) may comprise (or may consist of) a fourth set of CCEs (or RBs or RBGs or REGs) (e.g. represented as NCCE, 3) . In some embodiments, NCCE, 3 may be positive integer. In some embodiments, 1≤NCCE, 3≤45 or 1≤NCCE, 3≤46 (e.g. in case of S3=1) or 1≤NCCE, 3≤90 or 1≤NCCE, 3≤92 (e.g. in case of S3=2) or 1≤NCCE, 3≤135 or 1≤NCCE, 3≤138 (e.g. in case of S3=3) or 1≤NCCE, 3≤180 or 1≤NCCE, 3≤184 (e.g. in case of S3=4) or 1≤NCCE, 3≤270 or 1≤NCCE, 3≤275 (e.g. in case of S3=1) or 1≤NCCE, 3≤540 or 1≤NCCE, 3≤550 (e.g. in case of S3=2) or 1≤NCCE, 3≤810 or 1≤NCCE, 3≤825 (e.g. in case of S3=3) or 1≤NCCE, 3≤1080 or 1≤NCCE, 3≤1100 (e.g. in case of S3=4) .
[0106] In some embodiments, the CCEs (or RBs or RBGs or REGs) may be indexed from lower frequency to higher frequency. In some embodiments, the CCEs (or RBs or RBGs or REGs) may be indexed from left to right in the bit string configured for frequencyDomainResources (e.g. for one CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) ) . For example, this may be applicable at least when CCE-to-REG mapping type is non-interleaved mapping type.
[0107] In some embodiments, when CCE-to-REG mapping type is configured as interleaved mapping type, the CCE-to-REG mapping may be interleaved within the REGs or the REG bundles assigned to or associated with one of the N TCI states. In some embodiments, N may be 1 or 2 or 3 or 4. In some embodiments, one CORESET (e.g. the first CORESET or the second CORESET or the third CORESET) may consist of resource blocks in the frequency domain and symbols in the time domain. In some embodiments, for interleaved CCE-to-REG mapping, and for In some embodiments, if PDCCH repetition is configured, the interleaver may be defined by f(x) = (rC+c+nshift) mod (X / L) x=cR+r r=0, 1, …, R-1 c=0, 1, …, C-1 C=X / (LR) where R∈ {2, 3, 6} . In some embodiments, X may be the number of RBs or REGs associated with one of the N TCI states if the N TCI states are activated for the CORESET. Otherwise,
[0108] In some embodiments, values for the number of consecutive slots that a search space lasts in every occasion may comprise at least one of {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20} slots.
[0109] In some embodiments, a procedure is defined for determining physical downlink control channel candidates for a terminal device. In some embodiments, determining the CCE index (es) for each of a plurality of PDCCH candidates that is potentially to be used for PDCCH transmission between the network device and the terminal device. With the CCE index for PDCCH candidates determined, the terminal device can perform blind detection on these PDCCH candidates. Once PDCCH transmission is detected or received on a PDCCH candidate, the terminal device could decode it to obtain information such as at least one DCI.
[0110] In some embodiments, the terminal device may assume that a DMRS antenna port associated with PDCCH reception (s) in the CORESET is quasi co-located (QCLed) with the one or more reference signal (RS) configured by a TCI state, where the TCI state is indicated for the CORESET, if any.
[0111] In some embodiments, the at least one reference signal may be mapped to one symbol (or mapped to the first set of symbols) and / or mapped on resource elements with comb structure in the first set of resource blocks. In some embodiments, the at least one reference signal may be mapped to one symbol, and / or mapped on resource elements (REs) with comb structure in the first set of RBs (e.g. with comb value Tc) . In some embodiments, Tc may be positive integer. In some embodiments, Tc may be 1 or 2 or 3 or 4 or 6 or 8 or 12. In some embodiments, comb offset value (e.g. for the REs) may be represented as tc. In some embodiments, tc may be integer. In some embodiments, 0≤tc≤Tc-1 or 0≤tc≤11 or
[0112] In some embodiments, the at least one configuration for time domain resource and / or frequency domain resource for the at least one RS may include one or more of: symbol index (es) , index (es) of the first number of symbol (s) for the at least one RS, a number of consecutive symbols, periodicity and / or offset, a first set of RBs (or CCEs or REGs or RBGs) (e.g. based on the frequencyDomainResources configured for the first CORESET and / or the second CORESET and / or the third CORESET) . In some embodiments, the first set of RBs (or CCEs or REGs or RBGs) for the at least one RS may be represented as NRS. c In some embodiments, the sequence for the at least one RS or the root sequence (e.g. represented as r (n) ) may be zad-off chu (ZC) sequence or pseudo noise (PN) sequence or pseudo random sequence.
[0113] In some embodiments, a sequence for the at least one reference signal may be based on a cyclic shift of a root sequence (e.g. represented as ejαn*r (n) ) . In some embodiments, the sequence for the at least one reference signal may be based on the root sequence or the sequence (e.g. represented as r (n) ) . In some embodiments, a value of cyclic shift (e.g. the value of ejαn or the value of α) for the sequence for the at least one RS may correspond to or may be associated with the first information or a value of the first information. In some embodiments, a value of length (e.g. the value of MRS) of the sequence for the at least one RS and / or an index of the sequence for the at least one RS and / or a value of initialization (e.g. the value of cinit) for the sequence of the at least one RS and / or a value of parameter (e.g. the value of cRS) for initialization for the sequence of the at least one RS and / or a value of NID for initialization for the sequence of the at least one RS and / or a pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) and / or the location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS and / or the index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS and / or the location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS and / or the index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS and / or the value of index (es) (e.g. the value of n) in the sequence of the at least one RS may correspond to or may be associated with the first information or a value of the first information.
[0114] In some embodiments, the first information or a value of the first information may comprise (or may correspond to or may be associated with) one or more of: a value of cyclic shift (e.g. a value of ejαnor a value of α) for the sequence for the at least one RS, a value of length (e.g. a value of MRS) of the sequence for the at least one RS, an index of the sequence for the at least one RS, a value of initialization (e.g. a value of cinit) for the sequence of the at least one RS, a value of parameter (e.g. a value of cRS) for initialization for the sequence of the at least one RS, a value of NID for initialization for the sequence of the at least one RS, a pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , the location (s) of resource element (s) (RE(s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, the index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, the location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, the index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, the value of index (es) (e.g. the value of n) in the sequence of the at least one RS.
[0115] In some embodiments, the sequence (or the root sequence) (e.g. represented as r (n) ) may be defined by a length-31 Gold sequence. In some embodiments, the output sequence c (n) of length MPN (where n=0, 1, . . ., MPN-1) may be defined by below formulas. c(n) = (x1 (n+NC) +x2 (n+NC) ) mod 2 x1 (n+31) =(x1 (n+3) +x1 (n) ) mod 2 x2 (n+31) =(x2 (n+3) +x2 (n+2) +x2 (n+1) +x2 (n) ) mod 2
[0116] In some embodiments, r (n) may be c (n) . In some embodiments, c (n) may be r (n) .
[0117] In some embodiments, the length of the pseudo random sequence (e.g. c (n) or r (n) ) may be MPN. In some embodiments, MPN may be a positive integer. In some embodiments, 1600≤MPN≤146803000 or 1≤MPN≤146803000 or NC≤MPN≤146803000. In some embodiments, MRS may be one value of MPN. In some embodiments, MRS may be same as MPN.
[0118] In some embodiments, NC may be positive integer. In some embodiments, 1≤NC≤10000. In some embodiments, NC=1600. In some embodiments, the first m-sequence x1 (n) may be initialized with x1 (0) =1and / or x1 (n) =0 for n=1, 2, …30. In some embodiments, the initialization of the second m-sequence, x2 (n) , may be denoted by (e.g. with the value depending on the application of the sequence) .
[0119] In some embodiments, c (n) or r (n) may be pseudo random sequence or pseudo noise sequence. In some embodiments, c (n) or r (n) may be initialized with cinit. In some embodiments, c (n) or r (n) may be initialized with cinit at the beginning of each radio frame or at the beginning of each radio frame for which nf mod NF=0. In some embodiments, nf may be frame index or frame number. In some embodiments, nf may be integer. In some embodiments, 0≤nf≤1023 or 0≤nf≤10239 or 0≤nf≤Ntotal-1. In some embodiments, Ntotal may be positive integer. In some embodiments, Ntotal may be 1024 or 10240. In some embodiments, NF may be positive integer. In some embodiments, 1≤NF≤1024. In some embodiments, NF may be one or more of: {1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024} .
[0120] In some embodiments, cinit may be determined or calculated based on one or more of: value of slot index (or slot number) (e.g. represented as ) (e.g. within a frame or within a subframe) , value of subcarrier spacing (e.g. represented as μ) , value of symbol index (or symbol number) (e.g. represented as l) (e.g. within a slot) , number of symbols in a slot (e.g. represented as ) , a value of parameter for initialization (e.g. represented as cRS) , or a value of a first identity (e.g. represented as NID) .
[0121] In some embodiments, the first identity (e.g. NID) may be configured by the network device or determined by the network device or determined by the terminal device. In some embodiments, NID may be integer. In some embodiments, 0≤NID≤1007 or 0≤NID≤1023 or 0≤NID≤65535. In some embodiments, the first identity (e.g. NID) may comprise one or more or: a cell identity RS sequence identity a Radio Network Temporary Identifier (RNTI) , a Cell-Radio Network Temporary Identifier (C-RNTI) , a UE specific identity or a cell specific identity.
[0122] In some embodiments, or cinit= (A*F* (B*NID+1) +C*NID) mod D or or or or cinit= (A*F* (B*NID+G) +C*NID+E*cRS) mod D or or or or or or or cinit= (A*F* (B*NID+G+E*cRS) +C*NID) mod D or or cinit=A*F* (B*NID+1) +C*NID or or or or cinit=A*F* (B*NID+G) +C*NID+E*cRS or or or or or or or cinit=A*F* (B*NID+G+E*cRS) +C*NID.
[0123] In some embodiments, A may be integer. In some embodiments, In some embodiments, A may be In some embodiments, a1 may be integer. In some embodiments, 0≤a1≤31 or 0≤a1≤32. In some embodiments, a1 may be one or more of: {14, 15, 16, 17, 18, 19, 20} . In some embodiments, A may be 216 or 217 or 218.
[0124] In some embodiments, B may be integer. In some embodiments, 0≤B≤b1. In some embodiments, B may be one or more of: {0, 1, 2, 3, 4, 5, 6, 7, 8} . In some embodiments, b1 may be integer. In some embodiments, 0≤b1≤32 or 1≤b1≤32. In some embodiments, B may be number of possible values of the first information. In some embodiments, B may be 1 or 2. In some embodiments, B may be same as C.
[0125] In some embodiments, C may be integer. In some embodiments, 0≤C≤c1. In some embodiments, C may be one or more of: {0, 1, 2, 3, 4, 5, 6, 7, 8} . In some embodiments, c1 may be integer. In some embodiments, 0≤c1≤32 or 1≤c1≤32. In some embodiments, C may be number of possible values of the first information. In some embodiments, C may be 1 or 2. In some embodiments, C may be same as B.
[0126] In some embodiments, D may be integer. In some embodiments, In some embodiments, D may be In some embodiments, d1 may be integer. In some embodiments, 0≤d1≤31 or 0≤d1≤32 or 0≤d1≤63 or 0≤d1≤64. In some embodiments, d1 may be one or more of: {30, 31, 32, 33, 34} . In some embodiments, D may be 231 or 230 or 232.
[0127] In some embodiments, E may be integer. In some embodiments, 0≤E≤4 or 0≤E≤8 or 1≤E≤4 or 1≤E≤8. In some embodiments, E may be one or more of: {0, 1, 2} or one or more of: {1, 2} . In some embodiments, E may be 1 or 2.
[0128] In some embodiments, F may be integer. In some embodiments, 0≤F≤8960 or 1≤F≤8960 or 0≤F≤10000 or 1≤F≤10000. In some embodiments, F may be or
[0129] In some embodiments, G may be integer. In some embodiments, 0≤G≤4 or 0≤G≤8 or 1≤G≤4 or 1≤G≤8. In some embodiments, G may be one or more of: {0, 1, 2} or one or more of: {1, 2} . In some embodiments, G may be number of possible values of the first information. In some embodiments, G may be H or H+1. In some embodiments, G may be 1 or 2.
[0130] In some embodiments, cRS may be integer. In some embodiments, 0≤cRS≤4 or 0≤cRS≤8 or 0≤cRS≤15 or 0≤cRS≤7 or 0≤cRS≤3 or 0≤cRS≤1 or 0≤cRS≤2 or 0≤cRS≤H or 0≤cRS≤H-1. In some embodiments, cRS may be one or more of: {0, 1, 2} or one or more of: {0, 1} or one or more of: {0, 1, 2, 3} . In some embodiments, cRS may be 0 or 1 or 2 or 3. In some embodiments, cRS may be 0 or 1.
[0131] In some embodiments, H may be integer. In some embodiments, 0≤H≤4 or 0≤H≤8 or 1≤H≤4 or 1≤H≤8 or 1≤H≤2 or 1≤H≤16. In some embodiments, H may be one or more of: {0, 1, 2} or one or more of: {1, 2} . In some embodiments, H may be number of possible values of the first information. In some embodiments, H may be 2 or 4. In some embodiments, H may be 1 or 2.
[0132] In some embodiments, may be integer. In some embodiments, may be 12 or 14 or 16. In some embodiments, may be 12 for the case of extended cyclic prefix (CP) is configured. In some embodiments, may be 14 for the case of normal CP is configured.
[0133] In some embodiments, c (n) or r (n) may be initialized with cinit. In some embodiments, cinit may be determined based on a network-configured identity (such as, a cell identity RS sequence identity aC-RNTI (e.g. nRNTI) , or any other identity) . In some embodiments, the value of cell ID (e.g. represented as ) may be a non-negative integer. In some embodiments, or In some embodiments, the value of the at least one RS sequence identity may be a non-negative integer. In some embodiments, or In some embodiments, the value of the C-RNTI may be a non-negative integer. In some embodiments, 0≤nRNTI≤65535. In some embodiments, the first identity (e.g. NID) may be RS sequence identity if configured by the network device, and may be cell identity otherwise.
[0134] In some embodiments, the sequence (or the root sequence) (e.g. represented as r (n) ) may be given by r (n) =xq (n mod NZC) , wherein In some embodiments, In some embodiments, In some embodiments, NZC may be given by the largest prime number such that NZC≤MRS. In some embodiments, may represent function or operation of floor or round down. In some embodiments, π may be pi. In some embodiments, π may be 3.14 or 3.142 or 3.1415 or 3.1416 or 3.14159 or 3.141593 or 3.141592 or 3.1415926 or 3.1415927. In some embodiments, j may represent imaginary. In some embodiments, j*j=-1. In some embodiments, μ may be integer. In some embodiments, 0≤μ≤29. In some embodiments, v may be integer. In some embodiments, v may be 0 or 1.
[0135] In some embodiments, the cyclic shift α may be represented as: or or or or or or In some embodiments, the cyclic shift α may vary as a function of the symbol index (or symbol number) and / or slot index (or slot number) and / or subframe index (or subframe number) and / or frame index (or frame number) . In some embodiments, m0 and / or m1 may be comprised in the at least one configuration. In some embodiments, m0 may be integer. In some embodiments, m0 may be cell-specific parameter or common parameter for at least one terminal devices. In some embodiments, In some embodiments, m1 may be integer. In some embodiments, In some embodiments, m1 may be UE-specific parameter or separate parameter for different terminal devices. In some embodiments, may be an integer. In some embodiments, may be based on the value of MRS or NRS. In some embodiments, may be one or more of: 3, 4, 6, 8, 9, 12, 24. In some embodiments, may be a function of slot index and / or symbol index and / or frame index. In some embodiments, In some embodiments, may be positive integer. In some embodiments, may be 12 or 14 or 16.
[0136] In some embodiments, μ may refer to subcarrier spacing configuration or parameter of numerology. In some embodiments, the value of μ may be one of {0, 1, 2, 3, 4, 5, 6} . For example, μ=0 refers to subcarrier spacing 15kHz. For example, μ=1 refers to subcarrier spacing 30kHz. For example, μ=2 refers to subcarrier spacing 60kHz. For example, μ=3 refers to subcarrier spacing 120kHz. For example, μ=4 refers to subcarrier spacing 240kHz. For example, μ=5 refers to subcarrier spacing 480kHz. For example, μ=6 refers to subcarrier spacing 960kHz.
[0137] In some embodiments, may refer to a number / index of slot within a frame (or within a subframe) for subcarrier spacing configuration or parameter of numerology μ. In some embodiments, may refer to number of slots per frame for subcarrier spacing configuration μ. In some embodiments, the value of may be one of {10, 20, 40, 80, 160, 320, 640} . In some embodiments, the value of may be one of {10, 20, 40, 80, 160, 320, 640} for subcarrier spacing or parameter of numerology μ= {0, 1, 2, 3, 4, 5, 6} , respectively. In some embodiments, l may refer to a symbol number (or symbol index) in a slot. In some embodiments, l may a non-negative integer. In some embodiments, or 0≤ l≤13 or 0≤ l≤11. In some embodiments, a frame may be a duration of 10ms. In some embodiments, a frame may comprise 10 subframes. In some embodiments, a subframe may be a duration of 1ms.
[0138] In some embodiments, a value of mcs may correspond to a value of the first information. In some embodiments, mcs may be integer. In some embodiments, or 0≤mcs≤15 or 0≤mcs≤1 or 0≤mcs≤3 or 0≤mcs≤7. In some embodiments, the value of mcs may be 0 in case of the at least one PDCCH associated with the at least one RS is PDCCH with single-stage DCI. In some embodiments, the value of the first information may be represented as f1. In some embodiments, f1 may be integer. In some embodiments, 0≤f1≤15 or 0≤f1≤1 or 0≤f1≤3 or 0≤f1≤7 or 0≤f1≤b1 or 0≤f1≤b1-1.
[0139] In some embodiments, the terminal device may transmit or receive at least one channel or at least one RS based on at least one DCI. In some embodiments, the terminal device may transmit or receive at least one channel or at least one RS based on detection or reception of both of the first-stage DCI and the associated second-stage DCI. In some embodiments, the terminal device may transmit or receive at least one channel or at least one RS based on detection or reception of the single-stage DCI.
[0140] In some embodiments, the value of first information (e.g. f1) (e.g. the value may be 0 or 1) may be associated with or may be applied for determination of one or more of: existence or not of at least one DCI (or at least one PDCCH or the first-stage DCI or the two-stage DCI or the single-stage DCI or the second-stage DCI) or monitoring or not of the at least one DCI (or the at least one PDCCH) in a first duration. In some embodiments, the first duration may be a first number of slots starting from the slot comprising the at least one RS. For example, if the at least one RS is detected (based on the value of first information, e.g. predefined or configured by the network device) , the terminal device 110 may detect or receive at least one DCI (or at least one PDCCH) or monitor the at least one DCI (or at least one PDCCH) in the first duration. In some embodiments, the value of first information (e.g. f1) may be associated with or may be applied for determination of one or more of: existence or not for DMRS for at least one PDCCH, DMRS pattern for DMRS for at least one PDCCH, time domain resource density for DMRS for at least one PDCCH, frequency domain resource density for DMRS for at least one PDCCH) , a payload size (or interpretation type) for the first-stage DCI (or at least one DCI) , an indication of first-stage DCI or single-stage DCI, a confirmation of UEI measurement report, an existence or not of at least one field in the first-stage DCI, CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , CORESETPoolIndex, index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , DCI format for the at least one DCI, search space set index (e.g. for the at least one PDCCH or at least one DCI) , index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , value of first duration, index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , or skip monitoring of the at least one DCI (or at least one PDCCH) in the first duration. For example, if the at least one RS is detected (and / or based on the value of first information, e.g. predefined or configured by the network device) , the terminal device 110 may skip monitoring the at least one DCI in the first duration.
[0141] In some embodiments, the value of first information may be associated with or may be applied for determination of one or more of: a CORESET ID, a CORESETPoolIndex, an index of a group of CORESETs, a DCI format for the at least one DCI, a search space set index, an index of PDCCH candidates, an index of group of PDCCH candidates, a value of aggregation level, a value of first duration, or an index of starting control channel element (CCE) for monitoring the at least one DCI.
[0142] In some embodiments, there may be at least one configuration or parameter (e.g. configuration or parameter may be one or more of: CORESET or CORESETPoolIndex or group of CORESETs or DCI format or search space set or PDCCH candidate or group of PDCCH candidates or aggregation level or value of duration or index of starting CCE) configured for the at least one DCI. In some embodiments, the value of first information may be applied to determine one configuration or parameter (e.g. the index may be represented as n1) (e.g. associated with one or more of: CORESET or CORESETPoolIndex or group of CORESETs or DCI format or search space set or PDCCH candidate or group of PDCCH candidates or aggregation level or value of duration or index of starting CCE) configured for the at least one DCI) from the at least one configuration or parameter (e.g. associated with one or more of: CORESET or CORESETPoolIndex or group of CORESETs or DCI format or search space set or PDCCH candidate or group of PDCCH candidates or aggregation level or value of duration or index of starting CCE) configured for the at least one DCI) for the at least one DCI. In some embodiments, the number of at least one configuration or parameter (e.g. for one or more of: the first CORESET, the second CORESET, the third CORESET, the first search space set, the second search space set, the third search space set, the first group of PDCCH candidates, the second group of PDCCH candidates or the third group of PDCCH candidates) or the number of values (e.g. possible values) of the first information may be represented as N1. In some embodiments, N1 may be positive integer. In some embodiments, 1≤N1≤16. In some embodiments, n1 may be determined based on the function of f1 (and / or N1) . In some embodiments, n1=f1modN1 or n1=f2modN1 or n1=f3modN1 or n1= (f1+Y) modN1. In some embodiments, Y may be parameter in the at least one configuration. In some embodiments, mcs may be comprised in the at least one configuration.
[0143] In some embodiments, a first value of the first information (e.g. a first value of f1 or e.g. value 0 (or 1) ) may be associated with or may correspond to or may represent one or more of: existence of at least one DCI (or at least one PDCCH) , existence of the at least one DCI, existence of at least one PDCCH (e.g. for the terminal device) , existence of a first-stage DCI (e.g. for the terminal device) , existence of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence of a single-stage DCI (e.g. for the terminal device) , existence of a two-stage DCI (e.g. for the terminal device) , monitoring of the at least one DCI (or at least one PDCCH) in a first duration, existence for DMRS for at least one PDCCH, a first DMRS pattern for DMRS for at least one PDCCH, a first time domain resource density for DMRS for at least one PDCCH, a first frequency domain resource density for DMRS for at least one PDCCH, skip monitoring of the at least one DCI (or at least one PDCCH) in the first duration, a first value of CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , a first value of CORESETPoolIndex, a first index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , a first DCI format (e.g. DCI format for uplink scheduling or for PUSCH scheduling or for CSI request or for SRS request, e.g. DCI format 0_0 or 0_1 or 0_2 or 0_3 and / or e.g. for unicast PDSCH or for unicast PUSCH scheduling) for the at least one DCI, a first search space set index (e.g. for the at least one PDCCH or at least one DCI) , a first index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , a first index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , a first value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , a first value of first duration, a first index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , a first set of index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , a first payload size (or a first interpretation type) for the first-stage DCI, a first payload size (or a first interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) , confirmation of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , existence of at least one field in the first-stage DCI (or in the at least one DCI) , or a first reference timing for monitoring occasion (e.g. for at least one PDCCH) .
[0144] In some embodiments, a second value of the first information (e.g. a second value of f1 or e.g. value 1 (or 0) ) may be associated with or may correspond to or may represent one or more of: no existence of at least one DCI (or at least one PDCCH) , no existence of the at least one DCI, no existence of at least one PDCCH (e.g. for the terminal device) , no existence of a first-stage DCI (e.g. for the terminal device) , no existence of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , no existence of a single-stage DCI (e.g. for the terminal device) , no existence of a two-stage DCI (e.g. for the terminal device) , not monitoring of the at least one DCI (or at least one PDCCH) in a first duration or no existence of DMRS for at least one PDCCH.
[0145] In some embodiments, a second value of the first information (e.g. a second value of f1 or e.g. value 1 (or 0) ) may be associated with or may correspond to or may represent one or more of: no existence of DMRS for at least one PDCCH, existence of at least one DCI (or at least one PDCCH) , existence of the at least one DCI, existence of at least one PDCCH (e.g. for the terminal device) , existence of a first-stage DCI (e.g. for the terminal device) , existence of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence of a single-stage DCI (e.g. for the terminal device) , existence of a two-stage DCI (e.g. for the terminal device) , monitoring of the at least one DCI (or at least one PDCCH) in a first duration, existence for DMRS for at least one PDCCH, a second DMRS pattern for DMRS for at least one PDCCH, a second time domain resource density for DMRS for at least one PDCCH, a second frequency domain resource density for DMRS for at least one PDCCH, not skip monitoring of the at least one DCI (or at least one PDCCH) in the first duration, a second value of CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , a second value of CORESETPoolIndex, a second index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , a second DCI format (e.g. DCI format for downlink scheduling or for PDSCH scheduling or for SRS request, e.g. DCI format 1_0 or 1_1 or 1_2 or 1_3 and / or e.g. for unicast PUSCH or for unicast PDSCH scheduling) for the at least one DCI, a second search space set index (e.g. for the at least one PDCCH or at least one DCI) , a second index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , a second index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , a second value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , a second value of first duration, a second index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , a second set of index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , a second payload size (or a second interpretation type) for the first-stage DCI, a second payload size (or a second interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a single-stage DCI, no confirmation of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , no existence of at least one field in the first-stage DCI (or in the at least one DCI) , or a second reference timing for monitoring occasion (e.g. for at least one PDCCH) .
[0146] In some embodiments, a third value of the first information (e.g. a third value of f1 or e.g. value 2 (or 3) ) may be associated with or may correspond to or may represent: existence of at least one DCI (or at least one PDCCH) , existence of the at least one DCI, existence of at least one PDCCH (e.g. for the terminal device) , existence of a first-stage DCI (e.g. for the terminal device) , existence of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence of a single-stage DCI (e.g. for the terminal device) , existence of a two-stage DCI (e.g. for the terminal device) , monitoring of the at least one DCI (or at least one PDCCH) in a first duration, existence for DMRS for at least one PDCCH, a third DMRS pattern for DMRS for at least one PDCCH, a third time domain resource density for DMRS for at least one PDCCH, a third frequency domain resource density for DMRS for at least one PDCCH, skip monitoring of the at least one DCI (or at least one PDCCH) in the first duration, a third value of CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , a third value of CORESETPoolIndex, a third index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , a third DCI format (e.g. for multicast PDSCH or for broadcast PDSCH or for multicast PUSCH or for broadcast PUSCH scheduling) for the at least one DCI, a third search space set index (e.g. for the at least one PDCCH or at least one DCI) , a third index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , a third index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , a third value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , a third value of first duration, a third index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , a third set of index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , a third payload size (or a third interpretation type) for the first-stage DCI, a third payload size (or a third interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) , confirmation of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , existence of at least one field in the first-stage DCI (or in the at least one DCI) , or a third reference timing for monitoring occasion (e.g. for at least one PDCCH) .
[0147] In some embodiments, a fourth value of the first information (e.g. a fourth value of f1 or e.g. value 3 (or 2) ) may be associated with or may correspond to or may represent: existence of at least one DCI (or at least one PDCCH) , existence of the at least one DCI, existence of at least one PDCCH (e.g. for the terminal device) , existence of a first-stage DCI (e.g. for the terminal device) , existence of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence of a single-stage DCI (e.g. for the terminal device) , existence of a two-stage DCI (e.g. for the terminal device) , monitoring of the at least one DCI (or at least one PDCCH) in a first duration, existence for DMRS for at least one PDCCH, a fourth DMRS pattern for DMRS for at least one PDCCH, a fourth time domain resource density for DMRS for at least one PDCCH, a fourth frequency domain resource density for DMRS for at least one PDCCH, skip monitoring of the at least one DCI (or at least one PDCCH) in the first duration, a fourth value of CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , a fourth value of CORESETPoolIndex, a fourth index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , a fourth DCI format (e.g. for multicast PUSCH or for broadcast PUSCH or for multicast PDSCH or for broadcast PDSCH scheduling) for the at least one DCI, a fourth search space set index (e.g. for the at least one PDCCH or at least one DCI) , a fourth index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , a fourth index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , a fourth value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , a fourth value of first duration, a fourth index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , a fourth set of index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , a fourth payload size (or a fourth interpretation type) for the first-stage DCI, a fourth payload size (or a fourth interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) , confirmation of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , existence of at least one field in the first-stage DCI (or in the at least one DCI) , or a fourth reference timing for monitoring occasion (e.g. for at least one PDCCH) .
[0148] In some embodiments, value of cyclic shift may be represented as α or ejαn. In some embodiments, n may be integer. In some embodiments, 0≤n≤MRS-1.
[0149] In some embodiments, one or more of: a first value of a parameter for cyclic shift (e.g. a first value of mcs, e.g. 0 or X0) , a first value of cyclic shift (or a first value of α) (e.g. a first value of cyclic shift determined based on a first value of mcs, e.g. based on 0 or X0) , a first value of length of sequence for the at least one RS (e.g. a first value of MRS) , a first value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS (e.g. a first value of cRS) , a first value of NID for initialization of the sequence for the at least one RS, a first value of initialization (e.g. a first value of cinit) of the sequence for the at least one RS (e.g. based on the first value of cRS and / or based on the first value of NID) , a first pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , first location (s) of resource element (s) (RE(s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, first index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, first location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, first index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, a first value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS, first value of index (es) (e.g. the value of n) in the sequence of the at least one RS or a first value of starting index (or location) (e.g. represented as n1 or Δn1) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) , or a first set of indexes (or locations) (e.g. represented as n1 or Δn1) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) may be associated with or may indicate the first value of the first information (e.g. a first value of f1) .
[0150] In some embodiments, one or more of: a second value of a parameter for cyclic shift (e.g. a second value of mcs, e.g. X1 or X1+X0 or ) , a second value of cyclic shift (e.g. a second value of cyclic shift determined based on a second value of mcs or based on X1 or X1+X0 or ), a second value of length of sequence for the at least one RS (e.g. a second value of MRS) , a second value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS (e.g. a second value of cRS) , a second value of NID for initialization of the sequence for the at least one RS, a second value of initialization (e.g. a second value of cinit) of the sequence for the at least one RS (e.g. based on the second value of cRS and / or based on the second value of NID) , a second pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , second location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, second index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, second location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, second index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, a second value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS, a second value of starting index (or location) (e.g. represented as n2 or Δn2) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) , or a second set of indexes (or locations) (e.g. represented as n2 or Δn2) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) may be associated with or may indicate the second value of the first information (e.g. a second value of f1) .
[0151] In some embodiments, one or more of: a third value of a parameter for cyclic shift (e.g. a third value of mcs, e.g. X2 or X2+X0 or ) , a third value of cyclic shift (e.g. a third value of cyclic shift determined based on a third value of mcs or based on X2 or X2+X0 or ), a third value of length of sequence for the at least one RS (e.g. a third value of MRS) , a third value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS (e.g. a third value of cRS) , a third value of NID for initialization of the sequence for the at least one RS, a third value of initialization (e.g. a third value of cinit) of the sequence for the at least one RS (e.g. based on the third value of cRS and / or based on the third value of NID) , a third pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , third location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, third index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, third location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, third index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, a third value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS, a third value of starting index (or location) (e.g. represented as n3 or Δn3) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) , or a third set of indexes (or locations) (e.g. represented as n3 or Δn3) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) may be associated with or may indicate the third value of the first information (e.g. a third value of f1) .
[0152] In some embodiments, one or more of: a fourth value of a parameter for cyclic shift (e.g. a fourth value of mcs, e.g. X3 or X3+X0 or ) , a fourth value of cyclic shift (e.g. a fourth value of cyclic shift determined based on a fourth value of mcs or based on X3 or X3+X0 or ), a fourth value of length of sequence for the at least one RS (e.g. a v value of MRS) , a fourth value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS (e.g. a fourth value of cRS) , a fourth value of NID for initialization of the sequence for the at least one RS, a fourth value of initialization (e.g. a fourth value of cinit) of the sequence for the at least one RS (e.g. based on the fourth value of cRS and / or based on the fourth value of NID) , a fourth pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , fourth location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, fourth index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, fourth location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, fourth index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, a fourth value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS, a fourth value of starting index (or location) (e.g. represented as n4 or Δn4) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) , or a fourth set of indexes (or locations) (e.g. represented as n4 or Δn4) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) may be associated with or may indicate the fourth value of the first information (e.g. a fourth value of f1) .
[0153] In some embodiments, one or more of: a first value of a parameter for cyclic shift (e.g. a first value of mcs, e.g. 0 or X0) , a first value of cyclic shift (or a first value of α) (e.g. a first value of cyclic shift determined based on a first value of mcs, e.g. based on 0 or X0) , a first value of length of sequence for the at least one RS (e.g. a first value of MRS) , a first value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS (e.g. a first value of cRS) , a first value of NID for initialization of the sequence for the at least one RS, a first value of initialization (e.g. a first value of cinit) of the sequence for the at least one RS (e.g. based on the first value of cRS and / or based on the first value of NID) , a first pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , first location (s) of resource element (s) (RE(s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, first index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, first location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, first index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, a first value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS, a first value of starting index (or location) (e.g. represented as n1 or Δn1) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) , or a first set of indexes (or locations) (e.g. represented as n1 or Δn1) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) may be associated with or may indicate the second value of the first information (e.g. a second value of f1) .
[0154] In some embodiments, one or more of: a second value of a parameter for cyclic shift (e.g. a second value of mcs, e.g. X1 or X1+X0 or ) , a second value of cyclic shift (e.g. a second value of cyclic shift determined based on a second value of mcs or based on X1 or X1+X0 or ), a second value of length of sequence for the at least one RS (e.g. a second value of MRS) , a second value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS (e.g. a second value of cRS) , a second value of NID for initialization of the sequence for the at least one RS, a second value of initialization (e.g. a second value of cinit) of the sequence for the at least one RS (e.g. based on the second value of cRS and / or based on the second value of NID) , a second pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , second location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, second index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, second location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, second index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, a second value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS, a second value of starting index (or location) (e.g. represented as n2 or Δn2) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) , or a second set of indexes (or locations) (e.g. represented as n2 or Δn2) of the sequence for the at least one RS (e.g. from one root sequence c (n) or mapping to the root sequence c (n) ) may be associated with or may indicate the first value of the first information (e.g. a first value of f1) .
[0155] In some embodiments, a first value of a parameter for cyclic shift may be represented as a first value of mcs or represented as mcs, 1. In some embodiments, the first value of a parameter for cyclic shift and / or the first value of mcs and / or the value of mcs, 1 may be 0 or X0. In some embodiments, a second value of a parameter for cyclic shift may be represented as a second value of mcs or represented as mcs, 2. In some embodiments, the second value of a parameter for cyclic shift and / or the second value of mcsand / or the value of mcs, 2 may be X1 or X1+X0 or In some embodiments, a third value of a parameter for cyclic shift may be represented as a third value of mcs or represented as mcs, 3. In some embodiments, the third value of a parameter for cyclic shift and / or the third value of mcs and / or the value of mcs, 3 may be X2 or X2+X0 or In some embodiments, a fourth value of a parameter for cyclic shift may be represented as a fourth value of mcs or represented as mcs, 4. In some embodiments, the fourth value of a parameter for cyclic shift and / or the fourth value of mcs and / or the value of mcs, 4 may be X3 or X3+X0 or In some embodiments, the first value of a parameter for cyclic shift and / or the second value of a parameter for cyclic shift and / or the third value of a parameter for cyclic shift and / or the fourth value of a parameter for cyclic shift may be different from each other.
[0156] In some embodiments, a first value of cyclic shift (or a first value of α or a first value of ejαn) may be a value determined based on a first value of mcs or based on the value of mcs, 1. In some embodiments, the first value of cyclic shift may be the value of α or ejɑn with or or or or or or based on the first value of mcs or based on the value of mcswith value 0 or X0 or based on the value of mcs=mcs, 1.
[0157] In some embodiments, a second value of cyclic shift (or a second value of α or a second value of ejαn) may be a value determined based on a second value of mcs or based on the value of mcs, 2. In some embodiments, the second value of cyclic shift may be the value of α or ejαn with or or or or or or based on the second value of mcs or based on the value of mcs with value X1 or X1+X0 or or based on the value of mcs=mcs, 2.
[0158] In some embodiments, a third value of cyclic shift (or a third value of α or a third value of ejαn) may be a value determined based on a third value of mcs or based on the value of mcs, 3. In some embodiments, the third value of cyclic shift may be the value of α or ejαn with or or or or or or based on the third value of mcs or based on the value of mcswith value X2 or X2+X0 or or based on the value of mcs=mcs, 3.
[0159] In some embodiments, a fourth value of cyclic shift (or a fourth value of α or a fourth value of ejαn) may be a value determined based on a fourth value of mcs or based on the value of mcs, 4. In some embodiments, the fourth value of cyclic shift may be the value of α or ejαn with or or or or or or based on the fourth value of mcs or based on the value of mcs with value X3 or X3+X0 or or based on the value of mcs=mcs, 4.
[0160] In some embodiments, a first value of length of sequence for the at least one RS may be represented as a first value of MRS. In some embodiments, the first value of MRS may be represented as MRS, 1. In some embodiments, MRS, 1 may be positive integer. In some embodiments, 6≤MRS, 1≤3300. In some embodiments, In some embodiments, NRS, 1 may be positive integer. In some embodiments, 1≤NRS, 1≤170 or 1≤NRS, 1≤275 or 1≤NRS, 1≤46. In some embodiments, a second value of length of sequence for the at least one RS may be represented as a second value of MRS. In some embodiments, the second value of MRS may be represented as MRS, 2. In some embodiments, MRS, 2 may be positive integer. In some embodiments, 6≤MRS, 2≤3300. In some embodiments, In some embodiments, NRS, 2 may be positive integer. In some embodiments, 1≤NRS, 2≤170 or 1≤NRS, 2≤275 or 1≤NRS, 2≤46. In some embodiments, a third value of length of sequence for the at least one RS may be represented as a third value of MRS. In some embodiments, the third value of MRSmay be represented as MRS, 3. In some embodiments, MRS, 3 may be positive integer. In some embodiments, 6≤MRS, 3≤3300. In some embodiments, In some embodiments, NRS, 3 may be positive integer. In some embodiments, 1≤NRS, 3≤170 or 1≤NRS, 3≤275 or 1≤NRS, 3≤46. In some embodiments, a fourth value of length of sequence for the at least one RS may be represented as a fourth value of MRS. In some embodiments, the fourth value of MRS may be represented as MRS, 4. In some embodiments, MRS, 4 may be positive integer. In some embodiments, 6≤MRS, 4≤3300. In some embodiments, In some embodiments, NRS, 4 may be positive integer. In some embodiments, 1≤NRS, 4≤170 or 1≤NRS, 4≤275 or 1≤NRS, 4≤46.
[0161] In some embodiments, the first value of length of sequence for the at least one RS and / or the second value of length of sequence for the at least one RS and / or the third value of length of sequence for the at least one RS and / or the fourth value of length of sequence for the at least one RS may be different from each other.
[0162] In some embodiments, a first value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS may be represented as a first value of cRS. In some embodiments, the first value of cRS may be represented as cRS, 1. In some embodiments, cRS, 1 or the first value of cRS may be 0 (or 1) . In some embodiments, a second value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS may be represented as a second value of cRS. In some embodiments, the second value of cRS may be represented as cRS, 2. In some embodiments, cRS, 2 or the second value of cRS may be 1 (or 0) . In some embodiments, a third value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS may be represented as a third value of cRS. In some embodiments, the third value of cRS may be represented as cRS, 3. In some embodiments, cRS, 3 or the third value of cRS may be 2. In some embodiments, cRS, 2 or the second value of cRS may be 1 (or 0) . In some embodiments, a fourth value of parameter (e.g. represented as cRS) for initialization of the sequence for the at least one RS may be represented as a fourth value of cRS. In some embodiments, the fourth value of cRS may be represented as cRS, 4. In some embodiments, cRS, 4 or the fourth value of cRS may be 3.
[0163] In some embodiments, a first value of NID may be represented as NID, 1. In some embodiments, the first value of NID or the value of NID, 1 may be integer. In some embodiments, 0≤NID, 1≤65535 or 0≤NID, 1≤1007 or 0≤NID, 1≤1023. In some embodiments, a second value of NID may be represented as NID, 2. In some embodiments, the second value of NID or the value of NID, 2 may be integer. In some embodiments, 0≤NID, 2≤65535 or 0≤NID, 2≤1007 or 0≤NID, 2≤1023. In some embodiments, a third value of NID may be represented as NID, 3. In some embodiments, the third value of NID or the value of NID, 3 may be integer. In some embodiments, 0≤NID, 3≤65535 or 0≤NID, 3≤1007 or 0≤NID, 3≤1023. In some embodiments, a fourth value of NID may be represented as NID, 4. In some embodiments, the fourth value of NID or the value of NID, 4 may be integer. In some embodiments, 0≤NID, 4≤65535 or 0≤NID, 4≤1007 or 0≤NID, 4≤1023. In some embodiments, the first value of NID (or the value of NID, 1) and / or the second value of NID (or the value of NID, 2) and / or the third value of NID (or the value of NID, 3) and / or the fourth value of NID (or the value of NID, 4) may be different from each other.
[0164] In some embodiments, a first value of initialization (e.g. a first value of cinit) of the sequence for the at least one RS may be a first value of cinit. In some embodiments, the first value of cinit may be calculated based on the first value of cRS or the value of cRS, 1 or the first value of NID or the value of NID, 1. In some embodiments, a second value of initialization (e.g. a second value of cinit) of the sequence for the at least one RS may be a second value of cinit. In some embodiments, the second value of cinit may be calculated based on the second value of cRS or the value of cRS, 2 or the second value of NID or the value of NID, 2. In some embodiments, a third value of initialization (e.g. a third value of cinit) of the sequence for the at least one RS may be a third value of cinit. In some embodiments, the third value of cinit may be calculated based on the third value of cRS or the value of cRS, 3 or the third value of NID or the value of NID, 3. In some embodiments, a fourth value of initialization (e.g. a fourth value of cinit) of the sequence for the at least one RS may be a fourth value of cinit. In some embodiments, the fourth value of cinit may be calculated based on the fourth value of cRS or the value of cRS, 4 or the fourth value of NID or the value of NID, 4.
[0165] In some embodiments, one or more of: a first pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , first location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, first index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, first location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, first index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS may be associated with or may be a first value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS. In some embodiments, a first value of may be one or more of: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} or one or more of: {0, 1, …TC-1} or one or more of: {0, 1, …KRE-1} or or or In some embodiments, a first value of KDMRS may be one or more of: {1, 2, 3, 4} . In some embodiments, a first value of may be or may be one or more of: {0, 1, …KDMRS-1} . In some embodiments, a first value of KRE may be one or more of: {1, 2, 3, 4} .
[0166] In some embodiments, one or more of: a second pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , second location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, second index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, second location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, second index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS may be associated with or may be a second value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS. In some embodiments, a second value of may be one or more of: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} or one or more of: {0, 1, …TC-1} or one or more of: {0, 1, …KRE-1} or or or In some embodiments, a second value of KDMRS may be one or more of: {1, 2, 3, 4} . In some embodiments, a second value of may be or may be one or more of: {0, 1, …KDMRS-1} . In some embodiments, a second value of KRE may be one or more of: {1, 2, 3, 4} .
[0167] In some embodiments, one or more of: a third pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , third location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, third index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, third location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, third index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS may be associated with or may be a third value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS. In some embodiments, a third value of may be one or more of: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} or one or more of: {0, 1, …TC-1} or one or more of: {0, 1, …KRE-1} or or or In some embodiments, a third value of KDMRS may be one or more of: {1, 2, 3, 4} . In some embodiments, a third value of may be or may be one or more of: {0, 1, …KDMRS-1} . In some embodiments, a third value of KRE may be one or more of: {1, 2, 3, 4} .
[0168] In some embodiments, one or more of: a fourth pattern for mapping the sequence of the at least one RS to frequency domain resources (e.g. in the first set of RBs (or REGs or CCEs or RBGs) , fourth location (s) of resource element (s) (RE (s) ) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, fourth index (s) of RE (s) (or subcarrier (s) ) in at least one RB for mapping the sequence of the at least one RS, fourth location (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS, fourth index (s) of RB (s) (or REG (s) or CCE (s) or RBG (s) ) in the first set of RBs (or REGs or CCEs or RBGs) for mapping the sequence of the at least one RS may be associated with or may be a fourth value of (or KDMRS or or KRE or TC) for mapping the sequence of the at least one RS. In some embodiments, a fourth value of may be one or more of: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} or one or more of: {0, 1, …TC-1}or one or more of: {0, 1, …KRE-1} or or or In some embodiments, a fourth value of KDMRS may be one or more of: {1, 2, 3, 4} . In some embodiments, a fourth value of may be or may be one or more of: {0, 1, …KDMRS-1} . In some embodiments, a fourth value of KRE may be one or more of: {1, 2, 3, 4} .
[0169] In some embodiments, the first value of (or KDMRS or or KRE or TC) and / or the second value of (or KDMRS or or KRE or TC) and / or the third value of (or KDMRS or or KRE or TC) and / or the fourth value of (or KDMRS or or KRE or TC) may be different from each other.
[0170] In some embodiments, as mentioned above, or or or or or or In some embodiments, Table 1 shows an example of mapping of values for one first information bit to sequences for the at least one RS. Table 1
[0171] In some embodiments, X1 may be integer. In some embodiments, In some embodiments, or or In some embodiments, X0 may be integer. In some embodiments, In some embodiments, X0 may be 0. In some embodiments, X0 may be 0 or 1 or 2 or 3 or 4 or 5 or 6. In some embodiments, X0 may be different from X1.
[0172] In some embodiments, Table 2 shows an example of mapping of values for two first information bits to sequences for the at least one RS. Table 2
[0173] In some embodiments, X2 may be integer. In some embodiments, In some embodiments, or or In some embodiments, X3 may be integer. In some embodiments, In some embodiments, or or In some embodiments, X0 and / or X1 and / or X2 and / or X3may be different from each other.
[0174] In some embodiments, f1=mcs or In some embodiments, n2 may be integer. In some embodiments, 0≤n2≤N2-1. In some embodiments, N2 may be integer. In some embodiments,
[0175] In some embodiments, the terminal device 110 may detect at least one PDCCH within a frequency range of the at least one reference signal (or within the first set of RBs (or the first set of RBGs or the first set of REGs or the first set of CCEs) ) . In some embodiments, the terminal device 110 may detect or monitor or receive at least one PDCCH (e.g. for the at least one DCI) with CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) within the frequency range of the at least one RS (or within the first set of RBs (or the first set of RBGs or the first set of REGs or the first set of CCEs) ) .
[0176] In some embodiments, the terminal device 110 may detect a length (or a value of MRS or a value of NRS) or whether the length corresponding to a value of MRS, 1 or MRS, 2 or MRS, 3 or MRS, 4 (or a value of NRS, 1 or NRS, 2 or NRS, 3 or NRS, 4) for the at least one reference signal. In some embodiments, the terminal device 110 may detect the at least one reference signal with a length (e.g. MRS or one or more of: MRS, 1, MRS, 2, MRS, 3 or MRS, 4) and / or within the first set of RBs (or the first set of RBGs or the first set of REGs or the first set of CCEs) ) . In some embodiments, the terminal device 110 may detect the at least one PDCCH based on the length (or a value of MRS or a value of NRS) or whether the length corresponding to a value of MRS, 1 or MRS, 2 or MRS, 3 or MRS, 4 (or a value of NRS, 1 or NRS, 2 or NRS, 3 or NRS, 4) for the at least one reference signal. For example, the terminal device 110 may detect the length (or the set of RBs or the frequency range) for the at least one RS and / or within the first set of RBs (or the first set of RBGs or the first set of REGs or the first set of CCEs) ) , and the terminal device 110 may then detect or monitor or receive the at least one PDCCH based on the length (or within the first set of RBs (or the first set of RBGs or the first set of REGs or the first set of CCEs) or within the frequency range) for the at least one RS.
[0177] In some embodiments, the terminal device 110 may skip the PDCCH candidates with CCE (s) (or RB(s) or REG (s) or RBG (s) or CCE indexes) outside of the frequency range of the at least one RS or outside of the first set of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) . For example, if at least one of the determined CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) for PDCCH candidate is not within same frequency range of the at least one RS or not within the first set of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) , the terminal device 110 may skip monitoring the PDCCH candidate, or the terminal device 110 may detect or monitor or receive the PDCCH candidate with the second DMRS pattern. By way of example, as shown in FIG. 3A, the terminal device 110 may only monitor the PDCCH on a subset of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) sin the CORESET.
[0178] In some embodiments, the terminal device 110 may determine different DMRS (e.g. for PDCCH) patterns (and / or different time domain resource density of DMRS for PDCCH and / or different frequency domain resource density of DMRS for PDCCH and / or different time domain resource location of DMRS for PDCCH and / or different frequency domain resource location of DMRS for PDCCH) based on the length (or the first set of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) or the frequency range) for the at least one RS. For example, for the RBs (or CCE (s) or REGs or RBGs or CCE index (es) ) for one PDCCH candidate is not within (or not fully overlapped or not partially overlapped) with the frequency range (or the first set of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) ) of the at least one RS, a first DMRS pattern for the PDCCH candidate (e.g. the legacy pattern, for example, the first DMRS pattern for PDCCH 310) may be applied. In some embodiments, for the RBs (or CCEs or REGs or RBGs) for one PDCCH candidate is within (or fully overlapped or partially overlapped) with the frequency range (or the first set of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) ) of the at least one RS, a second DMRS pattern for the PDCCH candidate (for example, the second DMRS pattern for PDCCH 320) may be applied or there is no DMRS mapping on the symbols for the PDCCH candidate. For example, as shown in FIG. 3B, the terminal device 110 may apply different DMRS patterns (i.e., the first DMRS pattern 310 and the second DMRS pattern 320) for different RBs. As shown in FIG. 3B, the first DMRS pattern 310 is overlapping with the at least one RS in frequency domain and the second DMRS pattern 320 is not overlapping with the at least one RS in frequency domain.
[0179] In some embodiments, for the first DMRS pattern, the DMRS may be mapped on each RB of the CORESET or on each RB of the associated PDCCH candidate. In some embodiments, the DMRS may be mapped on the REs with indexes 1, 5, and 9 in one RB. In some embodiments, the DMRS may be mapped on the second RE, the sixth RE and the tenth RE in one RB (from lower to higher index) .
[0180] In some embodiments, for the first DMRS pattern, the DMRS may be mapped according to In some embodiments, k′ may be integer. In some embodiments, k′=0, 1, 2, …. In some embodiments, n may be integer. In some embodiments, n=0, 1, 2…..
[0181] In some embodiments, a DMRS for the at least one PDCCH may be mapped to a set of resource blocks (or CCE (s) or RBGs or REGs) associated with one PDCCH candidate. For example, the DMRS for PDCCH may be mapped to every KDMRS RBs (or REGs or CCEs or RBGs) (e.g. in frequency domain) (and / or on each symbol in time domain) associated with one PDCCH candidate. In some embodiments, KDMRS may be integer. In some embodiments, KDMRS may be 1 or 2 or 3 or 4.
[0182] In some embodiments, the DMRS for PDCCH may be mapped to KRE RE (s) (or subcarrier (s) ) on each RB (or on one RB or on at least one RB) with DMRS (or PTRS) for PDCCH. In some embodiments, KRE may be integer. In some embodiments, KRE may be 1 or 2 or 3 or 4 or 6 or 12. In some embodiments, the DMRS for PDCCH may be mapped to every TC RE (s) (or subcarrier (s) ) on each RB (or on one RB or on at least one RB) with DMRS (or PTRS) for PDCCH. In some embodiments, TC may be integer. In some embodiments, TC may be 1 or 2 or 3 or 4 or 6 or 12. In some embodiments,
[0183] In some embodiments, REs (or subcarriers) to which the terminal device 110 shall assume the DMRS (or PTRS) for PDCCH (e.g. for the at least one DCI) mapped may be: For example, for the second DMRS pattern for PDCCH. In some embodiments, i may be integer. In some embodiments, i=0, 1, 2…. In some embodiments, or In some embodiments, or ceil () may be round up to an integer or ceiling to an integer. In some embodiments, may be one value based on the REs within one RB (or at least one RB) for the at least one RS and / or based on the value of first information. In some embodiments, may be integer. In some embodiments, In some embodiments, In some embodiments, In some embodiments, In some embodiments, a may be integer. In some embodiments, In some embodiments, may be integer. In some embodiments, In some embodiments, may be determined based on one or more of: an RNTI (or C-RNTI or NID or nRNTI) associated with the at least one DCI, KDMRS, the number of RBs in frequency domain on one symbol for the PDCCH candidate, or the value of first information.
[0184] In some embodiments, a symbol offset between a symbol for the at least one reference signal and a first symbol for a CORESET is smaller than or equal to a first value. In some embodiments, , the symbol offset may be 0 or 1 or 2. In some embodiments, the symbol offset between the symbol (or the last symbol) for the at least one RS and the first symbol for the CORESET (e.g. first CORESET or second CORESET) may be 0 (e.g. consecutive) or no larger than a first value (e.g. 2 or 3) .
[0185] In some embodiments, a PDCCH (and / or the associated DMRS) for the PDCCH and the at least one reference signal may be quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters. In some embodiments, the terminal device 110 may assume DMRS for PDCCH (or PDCCH DMRS and / or the PDCCH) and the at least one RS to be quasi co-located with respect to one or more of: the Doppler shift, the Doppler spread, the average delay, the delay spread, or, when applicable, the spatial Rx parameters.
[0186] In some embodiments, a channel over which a PDCCH and / or a channel over which the associated DMRS for the PDCCH is conveyed may be inferred from a channel over which the at least one reference signal is conveyed. In this way, for the RBs overlapping with frequency range of the at least one RS (e.g. within the first set of CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) ) , the density of DMRS for PDCCH can be reduced. In some embodiments, the at least one RS may be applied for channel estimation or for inferring of channel for the at least one PDCCH (e.g. with the at least one DCI) and / or for DMRS of the at least one PDCCH.
[0187] In some embodiments, a first-stage DCI may comprise an indication of at least one second information, wherein the at least one second information may comprise one or more of: whether a second-stage DCI exists, whether to monitor the second-stage DCI in a second duration, whether a DMRS for the second-stage DCI exists, a type of DMRS pattern for the second-stage DCI, a time domain resource density for DMRS associated with PDCCH for the second-stage DCI, a frequency domain resource density for DMRS associated with PDCCH for the second-stage DCI, whether to skip monitoring of the second-stage DCI in the second duration, a CORESET, identity, a CORESET pool index, an index of a group of CORESETs, a DCI format for the second-stage DCI, a search space set index, an index of PDCCH candidate, an index of group of PDCCH candidates, a value of aggregation level, a value of the first duration, or an index of starting control channel element (CCE) for monitoring the second-stage DCI, existence or not of at least one DCI (or at least one PDCCH) , existence or not of the at least one DCI, existence or not of at least one PDCCH (e.g. for the terminal device) , existence or not of a first-stage DCI (e.g. for the terminal device) , existence or not of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence or not of a single-stage DCI (e.g. for the terminal device) , existence or not of a two-stage DCI (e.g. for the terminal device) , monitoring or not of the at least one DCI (or at least one PDCCH) in a first duration, existence or not for DMRS for at least one PDCCH, a DMRS pattern for DMRS for at least one PDCCH, a time domain resource density for DMRS for at least one PDCCH, a frequency domain resource density for DMRS for at least one PDCCH, skip or not monitoring of the at least one DCI (or at least one PDCCH) in the first duration, a value of CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , a value of CORESETPoolIndex, an index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , a DCI format for the at least one DCI, a search space set index (e.g. for the at least one PDCCH or at least one DCI) , a index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , a index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , a value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , a value of first duration, an index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , a set of index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , a payload size (or a first interpretation type) for the first-stage DCI, a payload size (or a first interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) , confirmation or not of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , existence or not of at least one field in the first-stage DCI (or in the at least one DCI) , time domain resource allocation for the second-stage DCI, frequency domain resource allocation for the second-stage DCI, or a reference timing for monitoring occasion (e.g. for at least one PDCCH) . In some embodiments, the first DCI may include an indication of at least one second information (e.g. represented as f2) . In some embodiments, the at least one second information may include one or more of: an existence or not of the second-stage DCI (or PDCCH for the second-stage DCI) , or monitoring or not of the second-stage DCI in a second duration. For example, the second duration may be a second number of slots starting from the slot comprising the first-stage DCI. The at least one second information may further include one or more of: an existence or not for DMRS or DMRS pattern or time domain resource density or frequency domain resource density for PDCCH (for the second-stage DCI) (or the DMRS on PDCCH symbol (s) (FDMed with PDCCH) ) , skip monitoring of the second-stage DCI in the second duration, a CORESET ID, a CORESETPoolIndex, an index of a group of CORESETs, a DCI format for the second-stage DCI, a search space set index, an index of PDCCH candidates, an index of group of PDCCH candidates, a value of aggregation level, a value of first duration, or an index of starting control channel element (CCE) for monitoring the second-stage DCI, existence or not of at least one DCI (or at least one PDCCH) , existence or not of the at least one DCI, existence or not of at least one PDCCH (e.g. for the terminal device) , existence or not of a first-stage DCI (e.g. for the terminal device) , existence or not of a second-stage DCI (e.g. associated with the first-stage DCI and / or for the terminal device) , existence or not of a single-stage DCI (e.g. for the terminal device) , existence or not of a two-stage DCI (e.g. for the terminal device) , monitoring or not of the at least one DCI (or at least one PDCCH) in a first duration, existence or not for DMRS for at least one PDCCH, a DMRS pattern for DMRS for at least one PDCCH, a time domain resource density for DMRS for at least one PDCCH, a frequency domain resource density for DMRS for at least one PDCCH, skip or not monitoring of the at least one DCI (or at least one PDCCH) in the first duration, a value of CORESET ID (e.g. for the at least one PDCCH or at least one DCI) , a value of CORESETPoolIndex, an index of a group of CORESETs (e.g. for the at least one PDCCH or at least one DCI) , a DCI format for the at least one DCI, a search space set index (e.g. for the at least one PDCCH or at least one DCI) , a index of PDCCH candidate (e.g. for the at least one PDCCH or at least one DCI) , a index of group of PDCCH candidates (e.g. for the at least one PDCCH or at least one DCI) , a value of aggregation level (e.g. for the at least one PDCCH or at least one DCI) , a value of first duration, an index of starting control channel element (CCE) for monitoring at least one PDCCH (or the at least one DCI) , a set of index (es) of CCE (s) for monitoring at least one PDCCH (or the at least one DCI) , a payload size (or a first interpretation type) for the first-stage DCI, a payload size (or a first interpretation type) for one or more of: a first-stage DCI, a two-stage DCI or a single-stage DCI, indication of a first-stage DCI (or a two-stage DCI) , confirmation or not of measurement report (e.g. initiated or triggered by terminal device or UE initiated (UEI) measurement report) , existence or not of at least one field in the first-stage DCI (or in the at least one DCI) , or a reference timing for monitoring occasion (e.g. for at least one PDCCH) .
[0188] In some embodiments, f2 may be integer. In some embodiments, 0≤f2≤1023 or 0≤f2≤8 or 0≤f2≤4 or 0≤f2≤16 or 0≤f2≤32 or 0≤f2≤7 or 0≤f2≤3 or 0≤f2≤15 or 0≤f2≤31.
[0189] In some embodiments, the time domain resources and / or the frequency domain resources of the second-stage DCI may be comprised in the time domain resources and / or the frequency domain resources for PDSCH (wherein the PDSCH may be scheduled by the associated first-stage DCI or the at least one DCI) . In some embodiments, the DMRS for the PDSCH may be applied for the second-stage DCI.
[0190] In some embodiments, the terminal device 110 may determine at least one third information based on one or more of the first information or the at least one second information. In some embodiments, the third information may be the first information or the second information. In some embodiments, the third information may be a combination of the first information and the one second information. For example, as shown in FIG. 4, the terminal device 110 may determine at least one third information (e.g. represented as f3, e.g. f3 may be integer, e.g. 0≤f3≤1023) for the PDCCH candidate (or for the second-stage DCI) based on the first information and / or the at least one second information.
[0191] In some embodiments, the third information may be the first information or the second information or based on the combination of the first information and / or the at least one second information. In some embodiments, the highest (or the most significant) B1 bits for the at least one third information may be based on the value of the first information (e.g. value of f1) , the remaining bits (or the lowest (or the least significant) B2 bits) for the at least one third information may be based on the value of the at least one second information (e.g. value of f2) . In some embodiments, the lowest (or the least significant) B1 bits for the at least one third information may be based on the value of the first information (e.g. value of f1) , the remaining bits (or the highest (or the most significant) B2 bits) for the at least one third information may be based on the value of the at least one second information (e.g. value of f2) . In some embodiments, B1 may be positive integer. In some embodiments, B1 may be 1 or 2 or 3. In some embodiments, B1=ceil (log2 (N1) ) or B1=log2 (N1) . In some embodiments, B2 may be positive integer. In some embodiments, B2 may be 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8. In some embodiments, B2=ceil (log2 (N2) ) or B2=log2 (N2) . In some embodiments, the number of bits for the field in the first DCI to indicate the second information may be B2. In some embodiments, N2 may be the possible number of values for the second information. In some embodiments, N2 may be integer. In some embodiments, 1≤N2≤32 or 1≤N2≤64 or 1≤N2≤128 or 1≤N2≤1024. In some embodiments, if the terminal device 110 detects the at least one RS and successfully decodes the first-stage DCI, the terminal device 110 may determine the at least one third information (e.g. based on combination of the first information and the second information) for monitoring PDCCH candidate and / or for detecting the second-stage DCI (e.g. one PDCCH candidate determined based on the at least one third information) . In some embodiments, if the terminal device 110 detects the at least one RS and unsuccessfully decodes the first-stage DCI, the terminal device 110 may detect the second-stage DCI with more PDCCH candidates (e.g. a group of PDCCH candidates only based on the first information) .
[0192] In some embodiments, the terminal device 110 may detect a second PDCCH for a second-stage DCI within a frequency range of a first PDCCH for a first-stage DCI. For example, the terminal device 110 may detect or monitor or receive a second PDCCH (or the second-stage DCI) with CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) within the frequency range (e.g. a second set of CCEs (or RBs or REGs or RBGs) of the first PDCCH with the first-stage DCI.
[0193] In some embodiments, the terminal device 110 may skip a PDCCH candidate with CCE (s) (or RB(s) or REG (s) or RBG (s) or CCE indexes) for a PDCCH outside of the frequency range of the first PDCCH or outside of the second set of CCEs (or RBs or REGs or RBGs) . In some embodiments, the terminal device may skip the PDCCH candidates with CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) outside of the frequency range of the first PDCCH or outside of the second set of CCEs (or RBs or REGs or RBGs) . In some embodiments, if at least one of the determined CCE (s) (or RB (s) or REG (s) or RBG (s) or CCE indexes) for PDCCH candidate is not within same frequency range of the first PDCCH or not within the second set of CCEs (or RBs or REGs or RBGs) , the terminal device 110 may skip monitoring the PDCCH candidate or monitoring the PDCCH candidate with the second DMRS pattern.
[0194] In some embodiments, the terminal device 110 may determine different DMRS patterns based on inside or outside of the frequency range of the first PDCCH or within or not of the second set of CCEs (or RBs or REGs or RBGs) . In some embodiments, the terminal device 110 may determine different DMRS patterns (and / or different time domain resource density of DMRS for PDCCH and / or different frequency domain resource density of DMRS for PDCCH and / or different time domain resource location of DMRS for PDCCH and / or different frequency domain resource location of DMRS for PDCCH) based on the frequency range of the first PDCCH or based on within or not within the second set of CCEs (or RBs or REGs or RBGs) . In some embodiments, for the RBs (or CCEs or REGs or RBGs) for one PDCCH candidate is not within (or not fully overlapped or not partially overlapped) with the frequency range (or not within the second set of CCEs (or RBs or REGs or RBGs) ) of the first PDCCH, a first DMRS pattern for the PDCCH candidate (e.g. the legacy pattern) may be applied. In some embodiments, for the RBs (or CCEs or REGs or RBGs) for one PDCCH candidate is within (or fully overlapped or partially overlapped) with the frequency range (or within the second set of CCEs (or RBs or REGs or RBGs) ) of the first PDCCH, a second DMRS pattern for the PDCCH candidate may be applied or there is no DMRS mapping on the symbols for the PDCCH candidate (e.g. in frequency domain) (within the second set of CCEs (or RBs or REGs or RBGs) ) .
[0195] In some embodiments, a DMRS for the second PDCCH for the second-stage DCI may be mapped to a set of resource blocks (e.g. within the second set of CCEs (or RBs or REGs or RBGs) ) associated with one PDCCH candidate. For example, the DMRS for second PDCCH for the second-stage DCI may be mapped to every KDMRS RBs (or REGs or CCEs or RBGs) (e.g. in frequency domain) (and / or on each symbol in time domain) associated with one PDCCH candidate. In some embodiments, KDMRS may be 1 or 2 or 3 or 4.
[0196] In some embodiments, the DMRS for PDCCH for the second-stage DCI may be mapped to KRERE(s) on each RB (or on one RB or on at least one RB) with DMRS (or PTRS) for PDCCH for the second-stage DCI. For example, KRE may be 1 or 2 or 3. In some embodiments, the DMRS for PDCCH for the second-stage DCI may be mapped to every TC RE (s) (or subcarrier (s) ) on each RB (or on one RB or on at least one RB) with DMRS (or PTRS) for PDCCH. In some embodiments, TC may be integer. In some embodiments, TC may be 1 or 2 or 3 or 4 or 6 or 12. In some embodiments,
[0197] In some embodiments, the REs (or subcarriers) to which the terminal device 110 shall assume the DMRS (or PTRS) for PDCCH for the second-stage DCI mapped may be: For example, for the second DMRS pattern for PDCCH. In some embodiments, or In some embodiments, may be one value based on the REs within one RB (or at least one RB) for the at least one RS and / or based on the value of first information. In some embodiments, may be integer. In some embodiments, In some embodiments, In some embodiments, In some embodiments, In some embodiments, may be integer, For example, may be determined based on one or more of: an RNTI (or C-RNTI or NID) associated with the at least one DCI, KDMRS, the number of RBs in frequency domain on one symbol for the PDCCH candidate, or the value of first information.
[0198] In some embodiments, a symbol offset between a first or last symbol for a first CORESET and a first symbol for a second CORSET is smaller than or equal to a first value. In some embodiments, the symbol offset may be 0. In some embodiments, the symbol offset between the symbol for the first (or last) symbol for the first CORSET and the first symbol for the second CORESET may be 0 (e.g. consecutive) or no larger than a first value (e.g. 2 or 3) .
[0199] In some embodiments, a second PDCCH for a second-stage DCI (and / or the DMRS associated with the second PDCCH) and a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH may be quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters. In some embodiments, the terminal device 110 may assume PDCCH (for the second-stage DCI) DMRS (and / or the DMRS for PDCCH for second-stage DCI and / or the PDCCH for the second-stage DCI) and the PDCCH (e.g. for the first-stage DCI) and / or the PDCCH DMRS (e.g. for the first-stage DCI) to be quasi co-located with respect to one or more of: the Doppler shift, the Doppler spread, the average delay, the delay spread, or, when applicable, spatial Rx parameters. In some embodiments, a channel over which a second PDCCH for a second-stage DCI and / or a channel over which the DMRS associated with the second PDCCH is conveyed is inferred from a channel over which a first PDCCH for a first-stage DCI and / or a channel over which the DMRS associated with the first PDCCH is conveyed. For example, the channel over which the PDCCH DMRS (for the second-stage DCI) and / or the PDCCH (for the second-stage DCI) is conveyed can be inferred from the channel over which the PDCCH (for the first-stage DCI) and / or the PDCCH DMRS (for the first-stage DCI) is conveyed. In some embodiments, the PDCCH with the first-stage DCI and / or the DMRS of the PDCCH with the first-stage DCI and / or the at least one RS may be applied for channel estimation or for inferring of channel for the PDCCH (e.g. with the second-stage DCI) and / or for DMRS of the PDCCH (e.g. with the second-stage DCI) .
[0200] In some embodiments, one second-stage DCI may be associated with one or more first-stage DCI. In some embodiments, one or more second-stage DCI may be associated with one first-stage DCI. In some embodiments, one first-stage DCI may be associated with one or more second-stage DCI.
[0201] In some embodiments, at least one DCI and / or one DCI format may comprise one or more of: a DCI format for downlink scheduling, a DCI format or for PDSCH scheduling, a DCI format for SRS request, DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 1_3, a DCI format for unicast PUSCH, a DCI format for unicast PDSCH scheduling, a DCI format for uplink scheduling, a DCI format for PUSCH scheduling, a DCI format for CSI request, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, a DCI format for broadcast scheduling, a DCI format for broadcast PDSCH scheduling, a DCI format for broadcast PUSCH scheduling, a DCI format for multicast scheduling, a DCI format for multicast PDSCH scheduling, or a DCI format for multicast PUSCH scheduling.
[0202] In some embodiments, at least one configuration may include a third CORESET (e.g. for at least one DCI or for two-stage DCI or for a first-stage DCI and the associated second-stage DCI) . In some embodiments, the third CORESET may comprise a first subset of symbols for PDCCH for a first-stage DCI. In some embodiments, the at least one configuration may include a third CORESET (e.g. for at least one DCI or for two-stage DCI or for a first-stage DCI and the associated second-stage DCI) . In some embodiments, the number of symbols for the third CORESET may be S3 (e.g. the fourth set of symbols) . In some embodiments, S3 may be positive integer. In some embodiments, S3 may be 2 or 3 or 4. In some embodiments, S3 may be 1 or 2 or 3.
[0203] In some embodiments, the third CORESET (or the fourth set of symbols) may comprise (or may be divided into) a first subset of symbols (e.g. represented as Ns) (e.g. starting from the first one symbol of the S3 symbols) ) and a second subset of symbols (e.g. represented as Nr, e.g. Nr may be S3-Ns) (e.g. starting from the (Ns+1) -th symbol of the S3 symbols or starting from the (Ns+1+Δs) -th symbol) . In some embodiments, the first subset of symbols may be applied for PDCCH candidate (s) for first-stage DCI. In some embodiments, Ns may be integer. In some embodiments, Ns may be 1 or 2. In some embodiments, the second subset of symbols may be applied for PDCCH candidate (s) for second-stage DCI. In some embodiments, the PDCCH candidate (s) with second-stage DCI may be mapped to the second subset of symbols (e.g. Nr or S3-Ns symbols) . In some embodiments, the PDCCH candidate (s) with second-stage DCI may be mapped to the remaining CCEs (or RBs or RBGs or REGs) (e.g. excluding the CCEs (or RBs or RBGs or REGs) occupied by the PDCCH candidate (s) with the first-stage DCI) on the Ns symbols and / or on the second subset of symbols. For example, as shown in FIG. 5, the at least one configuration may include the CORESET 530 and the CORESET 530 may include the first subset of symbols for PDCCH with the first-stage DCI 510 and the second subset of symbols for PDCCH with the second-stage DCI 520. In some embodiments, Nr may be integer. In some embodiments, Nr may be 1 or 2 or 3 or 4.
[0204] In some embodiments, the first subset of symbols (e.g. for the third CORESET) and the second subset of symbols (e.g. for the third CORESET) may be consecutive in time domain. In some embodiments, the first subset of symbols (e.g. for the third CORESET) and the second subset of symbols (e.g. for the third CORESET) may be non-consecutive in time domain. In some embodiments, symbol offset or the interval between the first subset of symbols (e.g. for the third CORESET) and the second subset of symbols (e.g. for the third CORESET) may be 0 or Δs. In some embodiments, symbol offset or the interval between the last symbol of the first subset of symbols (e.g. for the third CORESET) and the first symbol of the second subset of symbols (e.g. for the third CORESET) may be 0 or Δs. In some embodiments, Δs may be comprised in at least one configuration. In some embodiments, Δs may be 0 or 1 or 2 or 3.
[0205] In some embodiments, the first subset of symbols (and / or the first subset of CCEs (or RBs or RBGs or REGs) ) and the second subset of symbols (and / or the second subset of CCEs (or RBs or RBGs or REGs) ) may be configured to be associated or linked for the at least one DCI (or for two-stage DCI or for the first-stage DCI and the second-stage DCI) .
[0206] In some embodiments, the first subset of symbols and / or the first subset of CCEs (or RBs or RBGs or REGs) may be represented as first CORESET. In some embodiments, the first subset of symbols and / or the first subset of CCEs (or RBs or RBGs or REGs) may be represented as second CORESET.
[0207] In some embodiments, the third CORESET (or the fourth set of CCEs (or RBs or RBGs or REGs) (e.g. represented as NCCE, 3) ) may comprise (or may be divided into) a first subset of CCEs (or RBs or RBGs or REGs) (e.g. represented as NCCE, s1) (e.g. associated with or mapping to or within the first subset of symbols) and a second subset of CCEs (or RBs or RBGs or REGs) (e.g. represented as NCCE, s2 or NCCE, 3-NCCE, s1) (e.g. associated with or mapping to or within the first subset of symbols or may be the remaining CCEs excluding the CCEs occupied by the PDCCH candidate (s) with first-stage DCI) . In some embodiments, the first subset of CCEs (or RBs or RBGs or REGs) may be applied for PDCCH candidate (s) for first-stage DCI. In some embodiments, Ns may be 1 or 2. In some embodiments, the second subset of CCEs (or RBs or RBGs or REGs) may be applied for PDCCH candidate (s) for second-stage DCI. In some embodiments, the PDCCH candidate (s) with second-stage DCI may be mapped to the second subset of CCEs (or RBs or RBGs or REGs) (e.g. associated with or mapping to or within the second subset of symbols) . In some embodiments, the PDCCH candidate (s) with second-stage DCI may be mapped to the remaining CCEs (or RBs or RBGs or REGs) (e.g. excluding the CCEs (or RBs or RBGs or REGs) occupied by the PDCCH candidate (s) with the first-stage DCI) (e.g. associated with or mapping to or within the first subset of symbols and / or associated with or mapping to or within the second subset of symbols) .
[0208] In some embodiments, the number of CCEs (or RBs or RBGs or REGs) on one symbol for the third CORESET may be represented as NCCE, o. In some embodiments, NCCE, o may be integer. In some embodiments, 1≤NCCE, o≤46 or 1≤NCCE, o≤45 or 1≤NCCE, o≤270 or 1≤NCCE, o≤275 or 1≤NCCE, o≤NCCE, 3 or 1≤NCCE, o1≤NCCE, 3 / 2. In some embodiments, the total number of CCEs (or RBs or RBGs or REGs) for the third CORESET may be based on the number of CCEs (or RBs or RBGs or REGs) on one symbol (e.g. NCCE, o) for the third CORESET and the number of symbols for the third CORESET (e.g. S3) . In some embodiments, NCCE, 3=NCCE, o*S3.
[0209] In some embodiments, the number of CCEs (or RBs or RBGs or REGs) on one symbol of the first subset of symbols (e.g. for the third CORESET) may be represented as NCCE, o1. In some embodiments, NCCE, o1 may be integer. In some embodiments, 1≤NCCE, o1≤46 or 1≤NCCE, o1≤45 or 1≤NCCE, o1≤270 or 1≤NCCE, o1≤275 or 1≤NCCE, o1≤NCCE, s1 or 1≤NCCE, o1≤NCCE, s1 / 2.
[0210] In some embodiments, the number of CCEs (or RBs or RBGs or REGs) on one symbol of the second subset of symbols (e.g. for the third CORESET) may be represented as NCCE, o2. In some embodiments, NCCE, o2 may be integer. In some embodiments, 1≤NCCE, o2≤46 or 1≤NCCE, o2≤45 or 1≤NCCE, o2≤270 or 1≤NCCE, o2≤275 or 1≤NCCE, o2≤NCCE, s2 or 1≤NCCE, o2≤NCCE, s2 / 2.
[0211] In some embodiments, the total number of CCEs (or RBs or RBGs or REGs) for the third CORESET may be based on NCCE, o1 and / or NCCE, o2 and / or Ns and / or Nr) . In some embodiments, NCCE, 3=NCCE, o1*Ns+NCCE, o2*Nr.
[0212] In some embodiments, NCCE, o1 may be different from NCCE, o2. In some embodiments, NCCE, o1 and NCCE, o2 may be independently or separately configured or determined.
[0213] In some embodiments, NCCE, s1 may be integer. 1≤NCCE, s1≤45 or 1≤NCCE, s1≤46 (e.g. in case of Ns=1) or 1≤NCCE, s1≤90 or 1≤NCCE, s1≤92 (e.g. in case of Ns=2) or 1≤NCCE, s1≤135 or 1≤NCCE, s1≤138 (e.g. in case of Ns=3) or 1≤NCCE, s1≤270 or 1≤NCCE, s1≤275 (e.g. in case of Ns=1) or 1≤NCCE, s1≤540 or 1≤NCCE, s1≤550 (e.g. in case of Ns=2) or 1≤NCCE, s1≤810 or 1≤NCCE, s1≤825 (e.g. in case of Ns=3) .
[0214] In some embodiments, NCCE, s1 may be integer. In some embodiments, 1≤NCCE, s1≤NCCE, 3 or 0≤NCCE, s1≤NCCE, 3.
[0215] In some embodiments, NCCE, s2 may be integer. 1≤NCCE, s2≤45 or 1≤NCCE, s2≤46 (e.g. in case of Nr=1) or 1≤NCCE, s2≤90 or 1≤NCCE, s2≤92 (e.g. in case of Nr=2) or 1≤NCCE, s2≤135 or 1≤NCCE, s2≤138 (e.g. in case of Nr=3) or 1≤NCCE, s2≤270 or 1≤NCCE, s2≤275 (e.g. in case of Nr=1) or 1≤NCCE, s2≤540 or 1≤NCCE, s2≤550 (e.g. in case of Nr=2) or 1≤NCCE, s2≤810 or 1≤NCCE, s2≤825 (e.g. in case of Nr=3) .
[0216] In some embodiments, 1≤NCCE, s2≤NCCE, 3 or 0≤NCCE, s2≤NCCE, 3. In some embodiments, NCCE, s2=NCCE, 3-NCCE, s1. In some embodiments, NCCE, s1+NCCE, s2=NCCE, 3. In some embodiments, NCCE, s1+NCCE, s2≤NCCE, 3. In some embodiments, NCCE, s1+NCCE, s2<NCCE, 3.
[0217] In some embodiments, the terminal device 110 may determine CCEs (or RBs or RBGs or REGs) for PDCCH candidate (s) with a first-stage DCI based on at least one of: the first information associated with the at least one reference signal and / or a formula for CCE determination based on number of CCEs (or RBs or RBGs or REGs) on the first subset of symbols or based on the number of CCEs in the first subset of CCEs (e.g. NCCE, s1) . For example, the terminal device 110 may determine the CCEs (or RBs or RBGs or REGs) for PDCCH candidate (s) with the first-stage DCI based on the first information associated with the at least one RS and / or based on the formula for CCE determination (e.g. the first subset of CCEs (or RBs or REGs or RBGs or e.g. with value of NCCE, s1 to be the number of CCEs on the Ns symbols of the third CORESET) . In some embodiments, the formula (e.g. for determination of CCEs for PDCCH candidate (s) with first-stage DCI or for a search space set s associated with the third CORESET (e.g. index with value p) , the CCE indexes for aggregation level L1 corresponding to PDCCH candidate (e.g. index of ) (e.g. for the first-stage DCI) of the search space set in slot for an active downlink (DL) bandwidth part (BWP) of a serving cell (e.g. corresponding to carrier indicator field value nCI) ) may be based on the number of CCEs in the first subset of CCEs (e.g. NCCE, s1) (e.g. for the third CORESET) .
[0218] In some embodiments, the formula (e.g. for determination of CCEs for PDCCH candidate (s) with first-stage DCI or for a search space set s associated with the third CORESET (e.g. index with value p) , the CCE indexes for aggregation level L1 corresponding to PDCCH candidate (e.g. index of ) (e.g. for the first-stage DCI) of the search space set in slot for an active downlink (DL) bandwidth part (BWP) of a serving cell (e.g. corresponding to carrier indicator field value nCI) ) may be
[0219] In some embodiments, may be integer. In some embodiments, In some embodiments, (e.g. for any common search space (CSS) ) . In some embodiments, (e.g. for a UE-specific search space (USS) ) , In some embodiments, Yp, -1=nRNTI≠0. In some embodiments, Ap=39827 for pmod3=0. In some embodiments, Ap=39829 for pmod3=1. In some embodiments, Ap=39839 for pmod3=2. In some embodiments, D=65537.
[0220] In some embodiments, i1 may be integer. In some embodiments, i1=0, …, L1-1. In some embodiments, NCCE, s1 may be the number of CCEs (e.g. in the first subset of CCEs) (e.g. numbered from 0 to NCCE, s1-1) in the third CORESET (e.g. with index p) (and, if any, per RB set) .
[0221] In some embodiments, nCi may be integer. In some embodiments, nCi may be the carrier indicator field value if the terminal device 120 is configured with a carrier indicator field by CrossCarrierSchedulingConfig for the serving cell on which PDCCH is monitored; otherwise, including for any CSS, nCi=0. In some embodiments, In some embodiments, may be the number of PDCCH candidates the terminal device 120 is configured to monitor for aggregation level L1 of a search space set s (e.g. for the first-stage DCI) (and / or for a serving cell corresponding to nCI) .
[0222] In some embodiments, may be integer. In some embodiments, In some embodiments, for any CSS, In some embodiments, (e.g. for a USS) may be the maximum of over all configured nCI values for a CCE aggregation level L1 of search space set s (and / or for the first-stage DCI) .
[0223] In some embodiments, the at least one DCI or the first-stage DCI may be associated with USS.
[0224] In some embodiments, the terminal device 110 may determine CCEs for a second-stage DCI based on at least one of: the first information associated with the at least one reference signal, the second information, the third information, or a formula for CCE determination based on remaining number of CCEs or based on number of CCEs on the remaining symbols or based on the second subset of CCEs or based on the number of CCEs on the second subset of symbols. In some embodiments, the terminal device 110 may determine the CCEs for the second-stage DCI based on one or more of: the first information associated with the at least one RS, the second information in the first-stage, (or the third information) , or the formula with associated (or determined) value of index of PDCCH candidate and with value of NCCE, s2 to be the remaining CCEs or the number of CCEs on the second subset of symbols (e.g. Nrsymbols) . In some embodiments, the formula (e.g. for determination of CCEs for PDCCH candidate (s) with second-stage DCI or for a search space set s associated with the third CORESET (e.g. index with value p) , the CCE indexes for aggregation level L2 corresponding to PDCCH candidate (e.g. index of ) (e.g. for the second-stage DCI) of the search space set in slot for an active downlink (DL) bandwidth part (BWP) of a serving cell (e.g. corresponding to carrier indicator field value nCI) ) may be
[0225] In some embodiments, the formula (e.g. for determination of CCEs for PDCCH candidate (s) with second-stage DCI or for a search space set s associated with the third CORESET (e.g. index with value p), the CCE indexes for aggregation level L2 corresponding to PDCCH candidate (e.g. index of ) (e.g. for the second-stage DCI) of the search space set in slot for an active downlink (DL) bandwidth part (BWP) of a serving cell (e.g. corresponding to carrier indicator field value nCI) ) may be based on the number of CCEs in the second subset of CCEs (e.g. NCCE, s2) (e.g. for the third CORESET) .
[0226] In some embodiments, the CCEs or staring CCE or aggregation level L2 for the second-stage DCI may be associated with the CCEs or starting CCE for the first-stage DCI. In some embodiments, the first information associated with the at least one RS may indicate mapping of two-stage DCI or single-stage DCI (legacy mapping, and the fourth symbol may be ignored) in the third CORESET.
[0227] In some embodiments, i2 may be integer. In some embodiments, i2=0, …, L2-1. In some embodiments, NCCE, s2 may be the number of CCEs (e.g. in the second subset of CCEs) (e.g. numbered from 0 to NCCE, s2-1) in the third CORESET (e.g. with index p) (and, if any, per RB set) .
[0228] In some embodiments, may be integer. In some embodiments, the PDCCH candidate (s) or the number of PDCCH candidate (s) and / or the index (es) of the PDCCH candidates may be separately determined or counted based on the first subset of CCEs (and / or the first subset of symbols) and the second subset of CCEs (and / or the second subset of symbols) . In some embodiments, the PDCCH candidate (s) or the number of PDCCH candidate (s) and / or the index (es) of the PDCCH candidates may be jointly determined or counted based on the first subset of CCEs (and / or the first subset of symbols) and the second subset of CCEs (and / or the second subset of symbols) . In some embodiments, the PDCCH candidate (s) or the number of PDCCH candidate (s) and / or the index (es) of the PDCCH candidates may be determined or counted based on the total number of CCEs for the third CORESET.
[0229] In some embodiments, In some embodiments, may be the number of PDCCH candidates the terminal device 120 is configured to monitor for aggregation level L2 of a search space set s (e.g. for the second-stage DCI) (and / or for a serving cell corresponding to nCI) .
[0230] In some embodiments, may be integer. In some embodiments, In some embodiments, for any CSS, In some embodiments, (e.g. for a USS) may be the maximum of over all configured nCI values for a CCE aggregation level L2 of search space set s (and / or for the second-stage DCI) .
[0231] In some embodiments, s may be integer. In some embodiments, 0≤s≤39 or 0<s<40. In some embodiments, p may be integer. In some embodiments, 0≤p≤12 or 0≤p≤16 or 0<p<12 or 0<p<16.
[0232] In some embodiments, if the terminal device 120 provides HARQ-ACK information in a PUCCH transmission in response to detecting at least one DCI (or a DCI format of the at least one DCI) scheduling a PDSCH reception or a SPS PDSCH release, the terminal device 120 may determine a PUCCH resource with index rPUCCH.
[0233] In some embodiments, the index of the PUCCH resource may be determined based on the first subset of CCEs (associated with the third CORESET or associated with the first-stage DCI) or based on the number of CCEs associated with the first CORESET (e.g. for PDCCH with the first-stage DCI) . In some embodiments, the index of the PUCCH resource may be determined based on the second subset of CCEs (associated with the third CORESET or associated with the second-stage DCI) or based on the number of CCEs associated with the second CORESET (e.g. for PDCCH with the second-stage DCI) . In some embodiments, the index of the PUCCH resource may be determined based on the total number of CCEs (associated with the third CORESET) (e.g. NCCE, 3) (e.g. for PDCCH with the two-stage DCI or with the at least one DCI) .
[0234] In some embodiments, rPUCCH may be integer. In some embodiments, 0≤rPUCCH≤15 . In some embodiments, In some embodiments, NCCE, r may be NCCE, s1 or NCCE, s2 or NCCE, 3.
[0235] In some embodiments, nCCE, r may be the index of a first CCE for a PDCCH candidate (e.g. for first-stage DCI) and / or associated with the first subset of CCEs (e.g. NCCE, s1) (and / or associated with the number of CCEs for the third CORESET (e.g. NCCE, 3) ) . In some embodiments, nCCE, r may be the index of a first CCE for a PDCCH candidate (e.g. for second-stage DCI) and / or associated with the second subset of CCEs (e.g. NCCE, s2) (and / or associated with the number of CCEs for the third CORESET (e.g. NCCE, 3) ) . In some embodiments, nCCE, r may be the maximum value (or minimum value) between the index of a first CCE for a PDCCH candidate (e.g. for first-stage DCI) and the index of a first CCE for a PDCCH candidate (e.g. for second-stage DCI) and / or associated with the number of CCEs for the third CORESET (e.g. NCCE, 3) (and / or associated with the corresponding subset of CCEs corresponding to the determined index of a first CCE) (and / or associated with the first subset of CCEs (e.g. NCCE, s1) and / or associated with the second subset of CCEs (e.g. NCCE, s2) ) .
[0236] In some embodiments, ΔPRI may be a value of the PUCCH resource indicator field in the at least one DCI (e.g. the first-stage DCI and / or the second-stage DCI) .
[0237] In some embodiments, at least one field or interpretation of at least one field or payload size for a first-stage DCI is based on the first information. For example, if the first information and / or the at least one second information indicates no existence of the second-stage DCI, the first DCI may include at least one field for (or at least one field in the first DCI may be interpreted to be) time domain resource assignment and / or frequency domain resource assignment (e.g. associated with a first carrier) for downlink and / or uplink transmission (e.g. the data or PDSCH or PUSCH scheduled by the first-stage DCI) . For example, the first carrier may be a reference carrier among the plurality of carriers, or the one associated with the at least one PDCCH (or the at least one DCI) .
[0238] In some embodiments, if the first information indicates existence of the second-stage DCI, the first DCI may include at least one field (or the at least one field in the first DCI may be applied) to indicate second information for the second-stage DCI, e.g. the second information may comprise indication of one or more carriers of the plurality of carriers (e.g. bitmap or free selection) . For example, the frequency domain resource assignment field in the second-stage DCI may be based on the second information.
[0239] In some embodiments, the terminal device 110 may be configured with a plurality of carriers (or a plurality of groups of RBs) for one cell (and / or one BWP) . The REGs and / or PRGs and / or subband may be numbered in order of the plurality of groups of RBs. For example, for each group of RBs, the first one REG (or PRG or subband) and last one REG (or PRG or subband) in the group of RBs may be determined to be aligned with the boundary of REG. In some embodiments, the plurality of groups of RBs may be relative to a same reference point (e.g. pointA) .
[0240] In some embodiments, a first-stage DCI comprises one or more of: a field for bandwidth part (BWP) switching, a channel state information (CSI) request field, a transmission configuration indicator (TCI) state indicator, a confirmation of measurement report, or an indication of offset for hybrid automatic repeat request (HARQ) -acknowledgement (ACK) . For example, the first-stage DCI may also comprise one or more of: field for BWP switching, CSI request field, a first TCI state indicator (e.g. indicating a group of TCI states or a TCI state) , confirmation of UEI measurement report, indication of time domain offset for HARQ-ACK (e.g. corresponding to the first-stage DCI and / or the second-stage DCI and / or PDSCH scheduled by the first-stage DCI and / or the second-stage DCI) , NDI, MCS, RV. In some embodiments, if there is no second-stage DCI, the indicated offset for HARQ-ACK in the first-stage DCI is applied. Alternatively, or in addition, if there is second-stage DCI (associated with the first-stage DCI) , the indicated offset for HARQ-ACK in the second-stage DCI may be applied. In some embodiments, an indication of offset for HARQ-ACK in the first-stage DCI may be associated with HARQ-ACK information corresponding to the first-stage DCI and / or PDSCH scheduled by the first-stage DCI. In some other embodiments, an indication of offset for HARQ-ACK in the second-stage DCI may be associated with HARQ-ACK information corresponding to the second-stage DCI and / or PDSCH scheduled by the second-stage DCI.
[0241] In some embodiments, a second-stage DCI comprises one or more of: a second TCI state indicator or an indication of offset for HARQ-ACK. For example, the second-stage DCI may also include one or more of: a second TCI state indicator (e.g. indicating at least one TCI state in the group of TCI states indicated by the first-stage DCI) , indication of offset for HARQ-ACK (e.g. corresponding to the second-stage DCI and / or PDSCH scheduled by the first-stage DCI and / or the second-stage DCI) . In some embodiments, if there is no second-stage DCI, the indicated offset for HARQ-ACK in the first-stage DCI is applied. Alternatively, or in addition, if there is second-stage DCI (associated with the first-stage DCI) , the indicated offset for HARQ-ACK in the second-stage DCI may be applied.
[0242] In some embodiments, the indication of offset for HARQ-ACK in the first-stage DCI may be associated with HARQ-ACK information corresponding to the first-stage DCI and / or PDSCH scheduled by the first-stage DCI. Alternatively, or in addition, the indication of offset for HARQ-ACK in the second-stage DCI may be associated with HARQ-ACK information corresponding to the second-stage DCI and / or PDSCH scheduled by the second-stage DCI.
[0243] In some embodiments, the monitoring occasion for the at least one PDCCH may include one or more of: starting of the monitoring occasion or an ending of the monitoring occasion. The starting of the monitoring occasion may be the starting of the at least one RS or starting of the monitoring occasion for the first PDCCH (first-stage DCI) , and the ending of monitoring occasion may be the ending of the monitoring occasion for the second PDCCH (second-stage DCI) .
[0244] In some embodiments, the PUCCH resource may be determined based on the information associated with the first PDCCH (e.g. first CORESET or first-stage DCI) . In some embodiments, the reference timing for determination of PDSCH or PUSCH or HARQ-ACK may be based on the starting or ending of first-stage DCI and / or starting or ending of the second-stage DCI.
[0245] In some embodiments, a HARQ-ACK for two-stage DCI include at least three states. For example, a first state indicates successfully decoding of PDSCH (e.g. scheduled by the second-stage DCI and / or first-stage DCI) . As another example, a second state indicates failed decoding of PDSCH, and successfully detection of first-stage DCI (and / or successfully detection of second-stage DCI) . In this case, the network device 120 may retransmit the second-stage DCI, where the time and / or frequency resource for the retransmitted second-stage DCI may be same as the initial transmitted one. As another example, a third state may indicate failed first-stage DCI and / or a fourth state may indicate failed second-stage DCI.
[0246] In some embodiments, the at least three states are associated with different cyclic shift values for physical uplink control channel. For example, the three and / or four states may be associated with different cyclic shift values (e.g. value of nCS) for PUCCH. Table 3 below shows an example of mapping of values for three states to sequence for PUCCH. Table 3
[0247] In some embodiments, a downlink assignment index (DAI) field is comprised in a first-stage DCI. Alternatively, the DAI field is accumulated separately in the first-stage DCCI and a second-stage DCI.
[0248] In some embodiments, if the terminal device 110 monitors a PDCCH for DCI format with cyclic redundancy check (CRC) scrambled by at least one second value of radio network temporary identity, the terminal device 110 may determine that the DCI format is a single-stage DCI. For example, if the terminal device 110 monitors a PDCCH for a DCI format with CRC scrambled by at least one second value of RNTI (e.g. system information RNTI (SI-RNTI) , paging RNTI (P-RNTI) , Temporary cell RNTI (TC-RNTI) , random access RNTI (RA-RNTI) ) and / or DCI for beam failure recovery (BFR_response (or for link failure recovery response or for random access response) and / or associated with CSS, the DCI format may be assumed to be a single-stage DCI.
[0249] In some embodiments, at least one reference signal is mapped to two or more symbols. For example, the at least one RS may be mapped to two or more symbols, and TD-OCC may be applied to the two symbols, in case of [1, 1] , it may indicate a first value of the first information, and in case of [1, -1] , it may indicate a second value of the first information.
[0250] FIG. 6 illustrates a flowchart of a communication method 600 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the terminal device 110 in FIG. 1A to FIG. 1C.
[0251] At block 610, the terminal device detects at least one reference signal from a network device.
[0252] At block 620, the terminal device receives, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal. The at least one reference signal is associated with first information for the at least one DCI.
[0253] In some example embodiments, the first information is associated with one or more of: a determination of an existence of the at least one DCI, a determination of monitoring the at least one DCI in a first duration, a determination of an existence of demodulation reference signal, DMRS for physical downlink control channel, PDCCH, for the at least one DCI, a determination of a type of DMRS pattern for PDCCH for the at least one DCI, a determination of a time domain resource density of DMRS for PDCCH for the at least one DCI, a determination of a frequency domain resource density of DMRS for PDCCH for the at least one DCI, a determining of skipping monitoring of the at least one DCI in the first duration, a determination of an identity of a control resource set, CORESET, a determination of CORESET pool index, a determination of an index of a group of CORESETs, a determination of DCI format for the at least one DCI, a determination of search space set index, a determination of an index of PDCCH candidate, a determination of an index of group of PDCCH candidates, a determination of a value of aggregation level, a determination of a value of the first duration, a determination of an index of starting control channel element (CCE) for monitoring PDCCH for the at least one DCI, a determination of payload size for a first-stage DCI or for a single-stage DCI, a determination of first-stage or single-stage DCI, a determination of confirmation of measurement report triggered by the terminal device, a determination of an existence of at least one field in the first-stage DCI, or a determination of reference timing for monitoring occasion.
[0254] In some example embodiments, the at least one DCI comprises one or more of: a single-stage DCI, a two-stage DCI, a first-stage DCI, or a second-stage DCI.
[0255] In some example embodiments, the method 600 further includes: receiving at least one configuration from the network device, wherein the at least one configuration comprises one or more of: at least one configuration for time domain resource associated with the at least one reference signal, at least one configuration for frequency domain resource associated with the at least one reference signal, at least one configuration for time domain resource associated with the at least one DCI, at least one configuration for frequency domain resource associated with the at least one DCI, at least one configuration for time domain resource associated with a first-stage DCI, at least one configuration for frequency domain resource associated with the first-stage DCI, at least one configuration for time domain resource associated with a second-stage DCI, or at least one configuration for frequency domain resource associated with the second-stage DCI.
[0256] In some example embodiments, the at least one reference signal is mapped to one symbol and mapped on resource elements with comb structure in a set of resource blocks.
[0257] In some example embodiments, a sequence for the at least one reference signal is based on a cyclic shift of a root sequence.
[0258] In some example embodiments, the value of cyclic shift corresponds to the first information.
[0259] In some example embodiments, the method 600 further includes detecting at least one PDCCH within a frequency range of the at least one reference signal.
[0260] In some example embodiments, the method 600 further includes detecting a length for the at least one reference signal; and detecting the at least one PDCCH based on the length for the at least one reference signal.
[0261] In some example embodiments, a DMRS for the at least one PDCCH is mapped to a set of resource blocks associated with one PDCCH candidate.
[0262] In some example embodiments, a symbol offset between a symbol for the at least one reference signal and a first symbol for a CORESET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0263] In some example embodiments, a PDCCH and the associated DMRS for the PDCCH and the at least one reference signal are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0264] In some example embodiments, a channel over which a PDCCH and the associated DMRS for the PDCCH is conveyed is inferred from a channel over which the at least one reference signal is conveyed.
[0265] In some example embodiments, a first DCI comprises an indication of at least one second information, wherein the at least one second information comprises one or more of: whether a second-stage DCI exists, whether to monitor the second-stage DCI in a second duration, whether a DMRS for the second-stage DCI exists, a type of DMRS pattern for the second-stage DCI, a time domain resource density for DMRS associated with PDCCH for the second-stage DCI, a frequency domain resource density for DMRS associated with PDCCH for the second-stage DCI, whether to skip monitoring of the second-stage DCI in the second duration, a CORESET, identity, a CORESET pool index, an index of a group of CORESETs, a DCI format for the second-stage DCI, a search space set index, an index of PDCCH candidate, an index of group of PDCCH candidates, a value of aggregation level, a value of the first duration, or an index of starting control channel element (CCE) for monitoring the second-stage DCI.
[0266] In some example embodiments, the method 600 further includes determining at least one third information based on at least one of the first information or the at least one second information.
[0267] In some example embodiments, the method 600 further includes detecting a second PDCCH for a second-stage DCI within a frequency range of a first PDCCH for a first-stage DCI.
[0268] In some example embodiments, the method 600 further includes skipping a PDCCH candidate with CCE for the second PDCCH outside of the frequency range of the first PDCCH.
[0269] In some example embodiments, the method 600 further includes determining different DMRS patterns based on inside or outside of the frequency range of the first PDCCH.
[0270] In some example embodiments, a DMRS for the second PDCCH for the second-stage DCI is mapped to a set of resource blocks associated with one PDCCH candidate.
[0271] In some example embodiments, a symbol offset between a first or last symbol for a first CORESET and a first symbol for a second CORSET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0272] In some example embodiments, a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH and a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0273] In some example embodiments, a channel over which a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH is conveyed is inferred from a channel over which a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH is conveyed.
[0274] In some example embodiments, at least one configuration comprises a third CORESET for two-stage DCI, wherein the third CORESET comprises a first subset of symbols for PDCCH for a first-stage DCI.
[0275] In some example embodiments, the method 600 further includes determining CCEs for a first-stage DCI based on at least one of: the first information associated with the at least one reference signal or a formula for CCE determination based on number of CCEs on the first subset of symbols.
[0276] In some example embodiments, the method 600 further includes determining CCEs for a second-stage DCI based on at least one of: the first information associated with the at least one reference signal, the second information, the third information, or a formula for CCE determination based on remaining number of CCEs or based on number of CCEs on the remaining symbols.
[0277] In some example embodiments, at least one field or interpretation of at least one field or payload size for a first-stage DCI is based on the first information.
[0278] In some example embodiments, a first-stage DCI comprises one or more of: a field for bandwidth part (BWP) switching, a channel state information (CSI) request field, a transmission configuration indicator (TCI) state indicator, a confirmation of measurement report, or an indication of offset for hybrid automatic repeat request (HARQ) -acknowledgement (ACK) .
[0279] In some example embodiments, a second-stage DCI comprises one or more of: a second TCI state indicator or an indication of offset for HARQ-ACK.
[0280] In some example embodiments, a HARQ-ACK for two-stage DCI comprises at least three states.
[0281] In some example embodiments, the at least three states are associated with different cyclic shift values for physical uplink control channel.
[0282] In some example embodiments, a downlink assignment index (DAI) field is comprised in a first-stage DCI, or wherein the DAI field is accumulated separately in the first-stage DCCI and a second-stage DCI.
[0283] In some example embodiments: the method 600 further includes in response to that the terminal device monitors a PDCCH for DCI format with cyclic redundancy check (CRC) scrambled by at least one second value of radio network temporary identity, determining that the DCI format is a single-stage DCI.
[0284] In some example embodiments, the at least one reference signal is mapped to two or more symbols.
[0285] FIG. 7 illustrates a flowchart of a communication method 700 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the network device 120 in FIG. 1A to FIG. 1C.
[0286] At block 710, the network device transmits at least one reference signal to a terminal device.
[0287] At block 720, the network device transmits, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0288] In some example embodiments, the first information is associated with one or more of: a determination of an existence of the at least one DCI, a determination of monitoring the at least one DCI in a first duration, a determination of an existence of demodulation reference signal, DMRS for physical downlink control channel, PDCCH, for the at least one DCI, a determination of a type of DMRS pattern for PDCCH for the at least one DCI, a determination of a time domain resource density of DMRS for PDCCH for the at least one DCI, a determination of a frequency domain resource density of DMRS for PDCCH for the at least one DCI, a determining of skipping monitoring of the at least one DCI in the first duration, a determination of an identity of a control resource set, CORESET, a determination of CORESET pool index, a determination of an index of a group of CORESETs, a determination of DCI format for the at least one DCI, a determination of search space set index, a determination of an index of PDCCH candidate, a determination of an index of group of PDCCH candidates, a determination of a value of aggregation level, a determination of a value of the first duration, a determination of an index of starting control channel element (CCE) for monitoring PDCCH for the at least one DCI, a determination of payload size for a first-stage DCI or for a single-stage DCI, a determination of first-stage or single-stage DCI, a determination of confirmation of measurement report triggered by the terminal device, a determination of an existence of at least one field in the first-stage DCI, or a determination of reference timing for monitoring occasion.
[0289] In some example embodiments, the at least one DCI comprises one or more of: a single-stage DCI, a two-stage DCI, a first-stage DCI, or a second-stage DCI.
[0290] In some example embodiments, the method 700 further includes transmitting at least one configuration to the terminal device, wherein the at least one configuration comprises one or more of: at least one configuration for time domain resource associated with the at least one reference signal, at least one configuration for frequency domain resource associated with the at least one reference signal, at least one configuration for time domain resource associated with the at least one DCI, at least one configuration for frequency domain resource associated with the at least one DCI, at least one configuration for time domain resource associated with a first-stage DCI, at least one configuration for frequency domain resource associated with the first-stage DCI, at least one configuration for time domain resource associated with a second-stage DCI, or at least one configuration for frequency domain resource associated with the second-stage DCI.
[0291] In some example embodiments, the at least one reference signal is mapped to one symbol and mapped on resource elements with comb structure in a set of resource blocks.
[0292] In some example embodiments, a sequence for the at least one reference signal is based on a cyclic shift of a root sequence.
[0293] In some example embodiments, the value of cyclic shift corresponds to the first information.
[0294] In some example embodiments, a DMRS for the at least one PDCCH is mapped to a set of resource blocks associated with one PDCCH candidate.
[0295] In some example embodiments, a symbol offset between a symbol for the at least one reference signal and a first symbol for a CORESET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0296] In some example embodiments, a PDCCH and the associated DMRS for the PDCCH and the at least one reference signal are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0297] In some example embodiments, a channel over which a PDCCH and the associated DMRS for the PDCCH is conveyed is inferred from a channel over which the at least one reference signal is conveyed.
[0298] In some example embodiments, a first DCI comprises an indication of at least one second information, wherein the at least one second information comprises one or more of: whether a second-stage DCI exists, whether to monitor the second-stage DCI in a second duration, whether a DMRS for the second-stage DCI exists, a type of DMRS pattern for the second-stage DCI, a time domain resource density for DMRS associated with PDCCH for the second-stage DCI, a frequency domain resource density for DMRS associated with PDCCH for the second-stage DCI, whether to skip monitoring of the second-stage DCI in the second duration, a CORESET, identity, a CORESET pool index, an index of a group of CORESETs, a DCI format for the second-stage DCI, a search space set index, an index of PDCCH candidate, an index of group of PDCCH candidates, a value of aggregation level, a value of the first duration, or an index of starting control channel element (CCE) for monitoring the second-stage DCI.
[0299] In some example embodiments, the method 700 further includes transmitting a second PDCCH for a second-stage DCI within a frequency range of a first PDCCH for a first-stage DCI.
[0300] In some example embodiments, a DMRS for the second PDCCH for the second-stage DCI is mapped to a set of resource blocks associated with one PDCCH candidate.
[0301] In some example embodiments, a symbol offset between a first or last symbol for a first CORESET and a first symbol for a second CORSET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0302] In some example embodiments, a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH and a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0303] In some example embodiments, a channel over which a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH is conveyed is inferred from a channel over which a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH is conveyed.
[0304] In some example embodiments, at least one configuration comprises a third CORESET for two-stage DCI, wherein the third CORESET comprises a first subset of symbols for PDCCH for a first-stage DCI.
[0305] In some example embodiments, at least one field or interpretation of at least one field or payload size for a first-stage DCI is based on the first information.
[0306] In some example embodiments, a first-stage DCI comprises one or more of: a field for bandwidth part (BWP) switching, a channel state information (CSI) request field, a transmission configuration indicator (TCI) state indicator, a confirmation of measurement report, or an indication of offset for hybrid automatic repeat request (HARQ) -acknowledgement (ACK) .
[0307] In some example embodiments, a second-stage DCI comprises one or more of: a second TCI state indicator or an indication of offset for HARQ-ACK.
[0308] In some example embodiments, a HARQ-ACK for two-stage DCI comprises at least three states.
[0309] In some example embodiments, the at least three states are associated with different cyclic shift values for physical uplink control channel.
[0310] In some example embodiments, a downlink assignment index (DAI) field is comprised in a first-stage DCI, or wherein the DAI field is accumulated separately in the first-stage DCCI and a second-stage DCI.
[0311] In some example embodiments, the at least one reference signal is mapped to two or more symbols.
[0312] FIG. 8 is a simplified block diagram of a device 800 that is suitable for implementing embodiments of the present disclosure. The device 800 can be considered as a further example implementation of any of the devices as shown in FIG. 1A to FIG. 1C. Accordingly, the device 800 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0313] As shown, the device 800 includes a processor 810, a memory 820 coupled to the processor 810, a suitable transceiver 840 coupled to the processor 810, and a communication interface coupled to the transceiver 840. The memory 820 stores at least a part of a program 830. The transceiver 840 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 840 may include at least one of a transmitter 842 and a receiver 844. The transmitter 842 and the receiver 844 may be functional modules or physical entities. The transceiver 840 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0314] The program 830 is assumed to include program instructions that, when executed by the associated processor 810, enable the device 800 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1A to 7. The embodiments herein may be implemented by computer software executable by the processor 810 of the device 800, or by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 810 and memory 820 may form processing means 850 adapted to implement various embodiments of the present disclosure.
[0315] The memory 820 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 820 is shown in the device 800, there may be several physically distinct memory modules in the device 800. The processor 810 may be of any type suitable to the local technical network, and may include one or more of 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.
[0316] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: detect at least one reference signal from a network device; and receive, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0317] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit at least one reference signal to a terminal device; and transmit, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0318] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0319] According to embodiments of the present disclosure, a terminal apparatus is provided. The terminal apparatus comprises means for detecting at least one reference signal from a network device; and means for receiving, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI. In some embodiments, the terminal apparatus may comprise means for performing the respective operations of the method 600. In some example embodiments, the terminal apparatus may further comprise means for performing other operations in some example embodiments 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.
[0320] According to embodiments of the present disclosure, a network apparatus is provided. The network apparatus comprises means for transmitting at least one reference signal to a terminal device; and means for transmitting, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI. In some embodiments, the network apparatus may comprise means for performing the respective operations of the method 700. In some example embodiments, the network apparatus may further comprise means for performing other operations in some example embodiments 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.
[0321] In summary, embodiments of the present disclosure provide the following aspects.
[0322] In an aspect, it is proposed a terminal device, comprising: a processor, configured to cause the terminal device to: detect at least one reference signal from a network device; and receive, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0323] In some embodiments, the first information is associated with one or more of: a determination of an existence of the at least one DCI, a determination of monitoring the at least one DCI in a first duration, a determination of an existence of demodulation reference signal, DMRS for physical downlink control channel, PDCCH, for the at least one DCI, a determination of a type of DMRS pattern for PDCCH for the at least one DCI, a determination of a time domain resource density of DMRS for PDCCH for the at least one DCI, a determination of a frequency domain resource density of DMRS for PDCCH for the at least one DCI, a determining of skipping monitoring of the at least one DCI in the first duration, a determination of an identity of a control resource set, CORESET, a determination of CORESET pool index, a determination of an index of a group of CORESETs, a determination of DCI format for the at least one DCI, a determination of search space set index, a determination of an index of PDCCH candidate, a determination of an index of group of PDCCH candidates, a determination of a value of aggregation level, a determination of a value of the first duration, a determination of an index of starting control channel element (CCE) for monitoring PDCCH for the at least one DCI, a determination of payload size for a first-stage DCI or for a single-stage DCI, a determination of first-stage or single-stage DCI, a determination of confirmation of measurement report triggered by the terminal device, a determination of an existence of at least one field in the first-stage DCI, or a determination of reference timing for monitoring occasion.
[0324] In some embodiments, the at least one DCI comprises one or more of: a single-stage DCI, a two-stage DCI, a first-stage DCI, or a second-stage DCI.
[0325] In some embodiments, the terminal device is caused to: receive at least one configuration from the network device, wherein the at least one configuration comprises one or more of: at least one configuration for time domain resource associated with the at least one reference signal, at least one configuration for frequency domain resource associated with the at least one reference signal, at least one configuration for time domain resource associated with the at least one DCI, at least one configuration for frequency domain resource associated with the at least one DCI, at least one configuration for time domain resource associated with a first-stage DCI, at least one configuration for frequency domain resource associated with the first-stage DCI, at least one configuration for time domain resource associated with a second-stage DCI, or at least one configuration for frequency domain resource associated with the second-stage DCI.
[0326] In some embodiments, the at least one reference signal is mapped to one symbol and mapped on resource elements with comb structure in a set of resource blocks.
[0327] In some embodiments, a sequence for the at least one reference signal is based on a cyclic shift of a root sequence.
[0328] In some embodiments, the value of cyclic shift corresponds to the first information.
[0329] In some embodiments, the terminal device is caused to: detect at least one PDCCH within a frequency range of the at least one reference signal.
[0330] In some embodiments, the terminal device is caused to: detect a length for the at least one reference signal; and detect the at least one PDCCH based on the length for the at least one reference signal.
[0331] In some embodiments, a DMRS for the at least one PDCCH is mapped to a set of resource blocks associated with one PDCCH candidate.
[0332] In some embodiments, a symbol offset between a symbol for the at least one reference signal and a first symbol for a CORESET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0333] In some embodiments, a PDCCH and the associated DMRS for the PDCCH and the at least one reference signal are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0334] In some embodiments, a channel over which a PDCCH and the associated DMRS for the PDCCH is conveyed is inferred from a channel over which the at least one reference signal is conveyed.
[0335] In some embodiments, a first DCI comprises an indication of at least one second information, wherein the at least one second information comprises one or more of: whether a second-stage DCI exists, whether to monitor the second-stage DCI in a second duration, whether a DMRS for the second-stage DCI exists, a type of DMRS pattern for the second-stage DCI, a time domain resource density for DMRS associated with PDCCH for the second-stage DCI, a frequency domain resource density for DMRS associated with PDCCH for the second-stage DCI, whether to skip monitoring of the second-stage DCI in the second duration, a CORESET, identity, a CORESET pool index, an index of a group of CORESETs, a DCI format for the second-stage DCI, a search space set index, an index of PDCCH candidate, an index of group of PDCCH candidates, a value of aggregation level, a value of the first duration, or an index of starting control channel element (CCE) for monitoring the second-stage DCI.
[0336] In some embodiments, the terminal device is caused to: determine at least one third information based on at least one of the first information or the at least one second information.
[0337] In some embodiments, the terminal device is caused to: detect a second PDCCH for a second-stage DCI within a frequency range of a first PDCCH for a first-stage DCI.
[0338] In some embodiments, the terminal device is caused to: skip a PDCCH candidate with CCE for the second PDCCH outside of the frequency range of the first PDCCH.
[0339] In some embodiments, the terminal device is caused to: determine different DMRS patterns based on inside or outside of the frequency range of the first PDCCH.
[0340] In some embodiments, a DMRS for the second PDCCH for the second-stage DCI is mapped to a set of resource blocks associated with one PDCCH candidate.
[0341] In some embodiments, a symbol offset between a first or last symbol for a first CORESET and a first symbol for a second CORSET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0342] In some embodiments, a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH and a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0343] In some embodiments, a channel over which a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH is conveyed is inferred from a channel over which a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH is conveyed.
[0344] In some embodiments, at least one configuration comprises a third CORESET for two-stage DCI, wherein the third CORESET comprises a first subset of symbols for PDCCH for a first-stage DCI.
[0345] In some embodiments, the terminal device is caused to: determine CCEs for a first-stage DCI based on at least one of: the first information associated with the at least one reference signal or a formula for CCE determination based on number of CCEs on the first subset of symbols.
[0346] In some embodiments, the terminal device is caused to: determine CCEs for a second-stage DCI based on at least one of: the first information associated with the at least one reference signal, the second information, the third information, or a formula for CCE determination based on remaining number of CCEs or based on number of CCEs on the remaining symbols.
[0347] In some embodiments, at least one field or interpretation of at least one field or payload size for a first-stage DCI is based on the first information.
[0348] In some embodiments, a first-stage DCI comprises one or more of: a field for bandwidth part (BWP) switching, a channel state information (CSI) request field, a transmission configuration indicator (TCI) state indicator, a confirmation of measurement report, or an indication of offset for hybrid automatic repeat request (HARQ) -acknowledgement (ACK) .
[0349] In some embodiments, a second-stage DCI comprises one or more of: a second TCI state indicator or an indication of offset for HARQ-ACK.
[0350] In some embodiments, a HARQ-ACK for two-stage DCI comprises at least three states.
[0351] In some embodiments, the at least three states are associated with different cyclic shift values for physical uplink control channel.
[0352] In some embodiments, a downlink assignment index (DAI) field is comprised in a first-stage DCI, or wherein the DAI field is accumulated separately in the first-stage DCCI and a second-stage DCI.
[0353] In some embodiments, the terminal device is caused to: in response to that the terminal device monitors a PDCCH for DCI format with cyclic redundancy check (CRC) scrambled by at least one second value of radio network temporary identity, determine that the DCI format is a single-stage DCI.
[0354] In some embodiments, the at least one reference signal is mapped to two or more symbols.
[0355] In an aspect, it is proposed a network device, comprising: a processor, configured to cause the network device to: transmit at least one reference signal to a terminal device; and transmit, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.
[0356] In some embodiments, the first information is associated with one or more of: a determination of an existence of the at least one DCI, a determination of monitoring the at least one DCI in a first duration, a determination of an existence of demodulation reference signal, DMRS for physical downlink control channel, PDCCH, for the at least one DCI, a determination of a type of DMRS pattern for PDCCH for the at least one DCI, a determination of a time domain resource density of DMRS for PDCCH for the at least one DCI, a determination of a frequency domain resource density of DMRS for PDCCH for the at least one DCI, a determining of skipping monitoring of the at least one DCI in the first duration, a determination of an identity of a control resource set, CORESET, a determination of CORESET pool index, a determination of an index of a group of CORESETs, a determination of DCI format for the at least one DCI, a determination of search space set index, a determination of an index of PDCCH candidate, a determination of an index of group of PDCCH candidates, a determination of a value of aggregation level, a determination of a value of the first duration, a determination of an index of starting control channel element (CCE) for monitoring PDCCH for the at least one DCI, a determination of payload size for a first-stage DCI or for a single-stage DCI, a determination of first-stage or single-stage DCI, a determination of confirmation of measurement report triggered by the terminal device, a determination of an existence of at least one field in the first-stage DCI, or a determination of reference timing for monitoring occasion.
[0357] In some embodiments, the at least one DCI comprises one or more of: a single-stage DCI, a two-stage DCI, a first-stage DCI, or a second-stage DCI.
[0358] In some embodiments, the network device is caused to: transmit at least one configuration to the terminal device, wherein the at least one configuration comprises one or more of: at least one configuration for time domain resource associated with the at least one reference signal, at least one configuration for frequency domain resource associated with the at least one reference signal, at least one configuration for time domain resource associated with the at least one DCI, at least one configuration for frequency domain resource associated with the at least one DCI, at least one configuration for time domain resource associated with a first-stage DCI, at least one configuration for frequency domain resource associated with the first-stage DCI, at least one configuration for time domain resource associated with a second-stage DCI, or at least one configuration for frequency domain resource associated with the second-stage DCI.
[0359] In some embodiments, the at least one reference signal is mapped to one symbol and mapped on resource elements with comb structure in a set of resource blocks.
[0360] In some embodiments, a sequence for the at least one reference signal is based on a cyclic shift of a root sequence.
[0361] In some embodiments, the value of cyclic shift corresponds to the first information.
[0362] In some embodiments, a DMRS for the at least one PDCCH is mapped to a set of resource blocks associated with one PDCCH candidate.
[0363] In some embodiments, a symbol offset between a symbol for the at least one reference signal and a first symbol for a CORESET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0364] In some embodiments, a PDCCH and the associated DMRS for the PDCCH and the at least one reference signal are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0365] In some embodiments, a channel over which a PDCCH and the associated DMRS for the PDCCH is conveyed is inferred from a channel over which the at least one reference signal is conveyed.
[0366] In some embodiments, a first DCI comprises an indication of at least one second information, wherein the at least one second information comprises one or more of: whether a second-stage DCI exists, whether to monitor the second-stage DCI in a second duration, whether a DMRS for the second-stage DCI exists, a type of DMRS pattern for the second-stage DCI, a time domain resource density for DMRS associated with PDCCH for the second-stage DCI, a frequency domain resource density for DMRS associated with PDCCH for the second-stage DCI, whether to skip monitoring of the second-stage DCI in the second duration, a CORESET, identity, a CORESET pool index, an index of a group of CORESETs, a DCI format for the second-stage DCI, a search space set index, an index of PDCCH candidate, an index of group of PDCCH candidates, a value of aggregation level, a value of the first duration, or an index of starting control channel element (CCE) for monitoring the second-stage DCI.
[0367] In some embodiments, the network device is caused to: transmit a second PDCCH for a second-stage DCI within a frequency range of a first PDCCH for a first-stage DCI.
[0368] In some embodiments, a DMRS for the second PDCCH for the second-stage DCI is mapped to a set of resource blocks associated with one PDCCH candidate.
[0369] In some embodiments, a symbol offset between a first or last symbol for a first CORESET and a first symbol for a second CORSET is smaller than or equal to a first value, or wherein the symbol offset is equal to 0.
[0370] In some embodiments, a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH and a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.
[0371] In some embodiments, a channel over which a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH is conveyed is inferred from a channel over which a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH is conveyed.
[0372] In some embodiments, at least one configuration comprises a third CORESET for two-stage DCI, wherein the third CORESET comprises a first subset of symbols for PDCCH for a first-stage DCI.
[0373] In some embodiments, at least one field or interpretation of at least one field or payload size for a first-stage DCI is based on the first information.
[0374] In some embodiments, a first-stage DCI comprises one or more of: a field for bandwidth part (BWP) switching, a channel state information (CSI) request field, a transmission configuration indicator (TCI) state indicator, a confirmation of measurement report, or an indication of offset for hybrid automatic repeat request (HARQ) -acknowledgement (ACK) .
[0375] In some embodiments, a second-stage DCI comprises one or more of: a second TCI state indicator or an indication of offset for HARQ-ACK.
[0376] In some embodiments, a HARQ-ACK for two-stage DCI comprises at least three states.
[0377] In some embodiments, the at least three states are associated with different cyclic shift values for physical uplink control channel.
[0378] In some embodiments, a downlink assignment index (DAI) field is comprised in a first-stage DCI, or wherein the DAI field is accumulated separately in the first-stage DCCI and a second-stage DCI.
[0379] In some embodiments, the at least one reference signal is mapped to two or more symbols.
[0380] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0381] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0382] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0383] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0384] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0385] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0386] 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 representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods 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.
[0387] 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 process or method as described above with reference to FIGS. 1 to 8. 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.
[0388] 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.
[0389] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine 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 machine 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.
[0390] 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.
[0391] Although the present disclosure has been described in language 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:a processor, configured to cause the terminal device to:detect at least one reference signal from a network device; andreceive, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.2.The terminal device of claim 1, wherein the first information is associated with one or more of:a determination of an existence of the at least one DCI,a determination of monitoring the at least one DCI in a first duration,a determination of an existence of demodulation reference signal, DMRS for physical downlink control channel, PDCCH, for the at least one DCI,a determination of a type of DMRS pattern for PDCCH for the at least one DCI,a determination of a time domain resource density of DMRS for PDCCH for the at least one DCI,a determination of a frequency domain resource density of DMRS for PDCCH for the at least one DCI,a determining of skipping monitoring of the at least one DCI in the first duration,a determination of an identity of a control resource set, CORESET,a determination of CORESET pool index,a determination of an index of a group of CORESETs,a determination of DCI format for the at least one DCI,a determination of search space set index,a determination of an index of PDCCH candidate,a determination of an index of group of PDCCH candidates,a determination of a value of aggregation level,a determination of a value of the first duration,a determination of an index of starting control channel element (CCE) for monitoring PDCCH for the at least one DCI,a determination of payload size for a first-stage DCI or for a single-stage DCI,a determination of first-stage or single-stage DCI,a determination of confirmation of measurement report triggered by the terminal device,a determination of an existence of at least one field in the first-stage DCI, ora determination of reference timing for monitoring occasion.3.The terminal device of claim 1, wherein the at least one DCI comprises one or more of:a single-stage DCI,a two-stage DCI,a first-stage DCI, ora second-stage DCI.4.The terminal device of claim 1, wherein the terminal device is caused to:receive at least one configuration from the network device, wherein the at least one configuration comprises one or more of:at least one configuration for time domain resource associated with the at least one reference signal,at least one configuration for frequency domain resource associated with the at least one reference signal,at least one configuration for time domain resource associated with the at least one DCI,at least one configuration for frequency domain resource associated with the at least one DCI,at least one configuration for time domain resource associated with a first-stage DCI,at least one configuration for frequency domain resource associated with the first-stage DCI,at least one configuration for time domain resource associated with a second-stage DCI, orat least one configuration for frequency domain resource associated with the second-stage DCI.5.The terminal device of claim 1, wherein the at least one reference signal is mapped to one symbol and mapped on resource elements with comb structure in a set of resource blocks.6.The terminal device of claim 1, wherein a sequence for the at least one reference signal is based on a cyclic shift of a root sequence.7.The terminal device of claim 6, wherein the value of cyclic shift corresponds to the first information.8.The terminal device of claim 1, wherein the terminal device is caused to:detect at least one PDCCH within a frequency range of the at least one reference signal.9.The terminal device of claim 1, wherein a PDCCH and the associated DMRS for the PDCCH and the at least one reference signal are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.10.The terminal device of claim 1, wherein a channel over which a PDCCH and the associated DMRS for the PDCCH is conveyed is inferred from a channel over which the at least one reference signal is conveyed.11.The terminal device of claim 1, wherein a first DCI comprises an indication of at least one second information, wherein the at least one second information comprises one or more of:whether a second-stage DCI exists,whether to monitor the second-stage DCI in a second duration,whether a DMRS for the second-stage DCI exists,a type of DMRS pattern for the second-stage DCI,a time domain resource density for DMRS associated with PDCCH for the second-stage DCI,a frequency domain resource density for DMRS associated with PDCCH for the second-stage DCI,whether to skip monitoring of the second-stage DCI in the second duration,a CORESET, identity,a CORESET pool index,an index of a group of CORESETs,a DCI format for the second-stage DCI,a search space set index,an index of PDCCH candidate,an index of group of PDCCH candidates,a value of aggregation level,a value of the first duration, oran index of starting control channel element (CCE) for monitoring the second-stage DCI.12.The terminal device of claim 11, wherein the terminal device is caused to:determine at least one third information based on at least one of the first information or the at least one second information.13.The terminal device of claim 1, wherein the terminal device is caused to:detect a second PDCCH for a second-stage DCI within a frequency range of a first PDCCH for a first-stage DCI.14.The terminal device of claim 13, wherein the terminal device is caused to:skip a PDCCH candidate with CCE (s) for the second PDCCH outside of the frequency range of the first PDCCH.15.The terminal device of claim 13, wherein the terminal device is caused to:determine different DMRS patterns based on inside or outside of the frequency range of the first PDCCH.16.The terminal device of claim 1, wherein a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH and a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH are quasi co-located with respect to at least one of: Doppler shift, Doppler spread, average delay, delay spread, or spatial receiving parameters.17.The terminal device of claim 1, wherein a channel over which a second PDCCH for a second-stage DCI and / or the DMRS associated with the second PDCCH is conveyed is inferred from a channel over which a first PDCCH for a first-stage DCI and the DMRS associated with the first PDCCH is conveyed.18.The terminal device of claim 1, wherein at least one configuration comprises a third CORESET for two-stage DCI, wherein the third CORESET comprises a first subset of symbols for PDCCH for a first-stage DCI.19.The terminal device of claim 18, wherein the terminal device is caused to:determine CCEs for a first-stage DCI based on at least one of: the first information associated with the at least one reference signal or a formula for CCE determination based on number of CCEs on the first subset of symbols.20.The terminal device of claim 18, wherein the terminal device is caused to:determine CCEs for a second-stage DCI based on at least one of: the first information associated with the at least one reference signal, the second information, the third information, or a formula for CCE determination based on remaining number of CCEs or based on number of CCEs on the remaining symbols.21.A network device, comprising:a processor, configured to cause the network device to:transmit at least one reference signal to a terminal device; andtransmit, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.22.A communication method implemented at a terminal device, comprisingdetecting at least one reference signal from a network device; andreceiving, from the network device, at least one downlink control information, DCI, based on the detection of the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.23.A communication method implemented at a network device, comprising:transmitting at least one reference signal to a terminal device; andtransmitting, to the terminal device, at least one downlink control information, DCI, based on the at least one reference signal, wherein the at least one reference signal is associated with first information for the at least one DCI.24.A computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method according to any of claims 22-23.