Mechanism for repetition of physical downlink control channels

Abstract

The present disclosure relates to a solution for PDCCH repetition. In particular, a terminal device determines transmission resources for a repetitive set of physical downlink control channels (PDCCHs). The terminal device monitors a repeated set of PDCCHs from the network device based on the transmission resources. In this way, the time delay for the terminal device can be reduced, and the cache size at the terminal device can also be reduced.

Description

Technical Field

[0001] Various example embodiments of the present disclosure relate generally to the field of telecommunications, and in particular, to methods, devices, apparatus, and computer-readable storage media for repetition of a physical downlink control channel (PDCCH). Background Art

[0002] Coverage enhancement is a hot topic in the communications field. For example, considering the non-terrestrial network (NTN) characteristics including large propagation delay and satellite mobility, it may focus on the applicability of solutions developed for generic new radio (NR) coverage enhancement to NTNs and identify potential issues and enhancements. Summary of the invention

[0003] In a first aspect of the present disclosure, a device is provided. The device includes at least one processor; and at least one memory. The at least one memory stores instructions, which, when executed by the at least one processor, cause the device to: determine transmission resources for a repetition set of a physical downlink control channel (PDCCH); and monitor the repetition set of the PDCCH from a network device based on the determined transmission resources.

[0004] In a second aspect of the present disclosure, a device is provided. The device includes: at least one processor; and at least one memory. The at least one memory stores instructions, which, when executed by the at least one processor, cause the device to: transmit a repetition set of a physical downlink control channel (PDCCH) to a terminal device based on a transmission resource.

[0005] In a third aspect of the present disclosure, a method is provided, comprising: determining transmission resources for a repetition set of a physical downlink control channel (PDCCH); and monitoring the repetition set of the PDCCH from a network device based on the determined transmission resources.

[0006] In a fourth aspect of the present disclosure, a method is provided, comprising: transmitting a repetition set of a physical downlink control channel (PDCCH) to a terminal device based on a transmission resource.

[0007] In a fifth aspect of the present disclosure, a first apparatus is provided. The first apparatus includes: a component for determining transmission resources for a repetition set of a physical downlink control channel (PDCCH); and a component for monitoring the repetition set of the PDCCH from a network device based on the determined transmission resources.

[0008] In a sixth aspect of the present disclosure, a second apparatus is provided. The second apparatus includes a component for transmitting a repetition set of a physical downlink control channel (PDCCH) to a terminal device based on a transmission resource.

[0009] In a seventh aspect of the present disclosure, a computer-readable medium is provided, wherein the computer-readable medium includes instructions stored thereon, and the instructions are used to cause a device to at least execute the method according to the third aspect.

[0010] In an eighth aspect of the present disclosure, a computer-readable medium is provided, wherein the computer-readable medium includes instructions stored thereon, and the instructions are used to cause a device to at least execute the method according to the fourth aspect.

[0011] It should be understood that the contents described in the Summary of the Invention are not intended to limit the key features or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Some example embodiments will now be described with reference to the accompanying drawings, in which:

[0013] Figure 1 An example communication environment is shown in which example embodiments of the present disclosure can be implemented;

[0014] Figure 2 The signaling for communication according to some example embodiments of the present disclosure is shown. Figure 2

[0015] FIG. 3A to FIG. 3C The schematic diagram of the multiplexing mode is shown respectively Figure 2

[0016] FIG. 4A to FIG. 4C The schematic diagrams of the common search space (CSS) set are shown respectively. Figure 2

[0017] Figure 5A and Figure 5B Schematic diagram showing transmission resources for PDCCH repetition according to some example embodiments of the present disclosure Figure 2

[0018] Fig. 6A and Fig.6I Schematic diagram showing transmission resources for PDCCH repetition according to some example embodiments of the present disclosure Figure 2

[0019] Fig. 7A and Figure 7F Schematic diagram showing transmission resources for PDCCH repetition according to some example embodiments of the present disclosure Figure 2

[0020] Figure 8 Schematic diagram showing a repeating pattern according to some example embodiments of the present disclosure Figure 2

[0021] 9A to 9C The signaling for communication according to some example embodiments of the present disclosure are respectively shown. Figure 2

[0022] FIG. 10A to FIG. 10C Schematic diagrams showing repetitive modes according to some example embodiments of the present disclosure Figure 2

[0023] Fig.11 The flow chart of the method implemented at the first device according to some example embodiments of the present disclosure is shown. Figure 2

[0024] Fig.12 The flow chart of the method implemented at the second device according to some example embodiments of the present disclosure is shown. Figure 2

[0025] Fig.13 A simplified block diagram shows a device suitable for implementing an example embodiment of the present disclosure. Figure 2 as well as

[0026] Fig.14 A block diagram of an example computer-readable medium is shown according to some example embodiments of the present disclosure.

[0027] Throughout the drawings, the same or similar reference numerals refer to the same or similar elements. DETAILED DESCRIPTION

[0028] The principles of the present disclosure will now be described with reference to some example embodiments. It should 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 implying any limitation on the scope of the present disclosure. In addition to the embodiments described below, the embodiments described herein can be implemented in various ways.

[0029] 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 skill in the art to which this disclosure belongs.

[0030] References in this disclosure to "one embodiment," "an embodiment," "an example embodiment," etc. indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes the particular feature, structure, or characteristic. Furthermore, these phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to affect such feature, structure, or characteristic in other embodiments, whether or not explicitly described.

[0031] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiments, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. As used herein, the term "and / or" includes any and all combinations of one or more of the listed terms.

[0032] As used herein, “at least one of: ,” “at least one of ,” and similar descriptions, where a list of two or more elements is connected by “and” or “or,” means at least any one element, or at least any two or more elements, or at least all the elements.

[0033] As used herein, unless explicitly stated, performing a step “in response to A” does not mean performing the step immediately after “A” occurs, but may include one or more intermediate steps.

[0034] The terms used herein are used only to describe specific embodiments and are not intended to limit the example embodiments. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that when used herein, the terms "comprise", "comprising", "having", "having", "includes", and / or "including", when used herein, specify the presence of the described features, elements, and / or components, etc., but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0035] As used in this application, the term "circuitry" may refer to one or more or all of the following: (a) hardware circuit implementation only (such as implementation only in analog and / or digital circuits) and (b) a combination of hardware circuitry and software such as (where applicable): (i) a combination of analog and / or digital hardware circuits and software / firmware; and (ii) a hardware processor and software (including a digital signal processor), any portion of software and memory, which work together to enable a device (such as a mobile phone or server) to perform various functions; and (c) a hardware circuit and / or processor, such as a microprocessor or a portion of a microprocessor, which requires software (e.g. firmware) to operate, but the software may be absent when not required for operation.

[0036] This definition of circuitry applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of only a hardware circuit, or a processor (or multiple processors), or a portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in a server, cellular network device, or other computing or network device, if applicable to the particular claim element.

[0037] As used herein, the term "communication network" refers to a network that complies with any suitable communication standard, such as New Radio (NR), Long Term Evolution (LTE), Advanced LTE (LTE-A), Wideband Code Division Multiple Access (WCDMA), High Speed ​​Packet Access (HSPA), Narrowband Internet of Things (NB-IoT), etc. In addition, the communication between the terminal device and the network device in the communication network can be carried out according to any suitable generation communication protocol, including but not limited to the first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G), sixth generation (6G) communication protocol and / or any other protocol currently known or developed in the future. The embodiments of the present disclosure can be applied to various communication systems. In view of the rapid development of communication, there are of course communication technologies and systems of future types that can implement the present disclosure. The scope of the present disclosure should not be limited to the above-mentioned system.

[0038] As used herein, the term "network device" refers to a node in a communication network, from which a terminal device accesses the network and receives services from the node. A network device may refer to a base station (BS) or an access point (AP), such as a NodeB (NodeB or NB), an evolved NodeB (eNodeB or eNB), a NR NB (also known as a gNB), a remote radio unit (RRU), a radio head (RH), a remote radio head (RRH), a repeater, an integrated access and backhaul (IAB) node, a low-power node such as a femto, a micro, a non-terrestrial network (NTN) or non-terrestrial network equipment, such as a satellite network equipment, a low earth orbit (LEO) satellite and a geosynchronous orbit (GEO) satellite, an aircraft network equipment, etc., depending on the terminology and technology applied. In some example embodiments, a radio access network (RAN) split architecture includes a centralized unit (CU) and a distributed unit (DU) at an IAB donor node. The IAB node includes a mobile terminal (IAB-MT) portion that behaves like a user equipment (UE) to a parent node, and a distributed unit (DU) portion of the IAB node that behaves like a base station to a next-hop IAB node.

[0039] The term "terminal device" refers to any terminal device capable of wireless communication. As an example and not limitation, the terminal device may also be referred to as a communication device, a user equipment (UE), a subscriber station (SS), a portable subscriber station, a mobile station (MS) or an access terminal (AT). The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet computer, a wearable terminal device, a personal digital assistant (PDA), a portable computer, a desktop computer, an image capture terminal device such as a digital camera, a game terminal device, a music storage and playback facility, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, a laptop embedded equipment (LEE), a laptop mounted equipment (LME), a USB dongle, a smart device, a wireless user terminal equipment (CPE), an Internet of Things (IoT) device, a watch or other wearable device, a head mounted display (HMD), a vehicle, a drone, medical equipment and applications (e.g., remote surgery), industrial equipment and applications (e.g., robots and / or other wireless devices operating in industrial and / or automatic processing chain environments), consumer electronic devices, equipment operating on commercial and / or industrial wireless networks, etc. The terminal device may also correspond to the mobile terminal (MT) part of an IAB node (eg, a relay node).In the following description, the terms "terminal device", "communication device", "terminal", "user device", "user equipment" and "UE" may be used interchangeably.

[0040] As used herein, the term "resource", "transmission resource", "resource block", "physical resource block" (PRB), "uplink resource" or "downlink resource" may refer to any resource used to perform communication, such as communication between a terminal device and a network device, such as a resource in the time domain, a resource in the frequency domain, a resource in the spatial domain, a resource in the code domain, or any other resource supporting communication. In the following, unless explicitly stated, resources in the frequency domain and the time domain will be used as examples of transmission resources for describing some example embodiments of the present disclosure. It should be noted that the example embodiments of the present disclosure are also applicable to other resources in other domains.

[0041] As used herein, the term "common search space (CSS)" may refer to a search space (i.e., a set of resources) in which each UE needs to search for control signals of each UE or signaling messages applied to each UE before establishing a dedicated channel for a specific UE. The term "control resource set (CORESET)" used herein may refer to a physical resource used to carry a physical downlink control channel (PDCCH). The term "repetition factor" used herein may refer to the number of repetitions. The term "bitmap" used herein may refer to a string of binary numbers. The term "monitoring opportunity (MO)" used herein may refer to a set of resources used for control channel monitoring.

[0042] As mentioned above, coverage enhancement is one of the important aspects of communication system design. In NTN, when considering satellite power limitations (e.g. due to regulatory requirements or power allocation between beams of the satellite), it is necessary to enhance the uplink UL and downlink DL channels related to initial access. In some solutions, coverage enhancement for PDCCH channels is necessary when considering power flux density (PFD) limitations or more generally limitations of satellite output power.

[0043] In general, three basic approaches can be considered to improve coverage. They are: (a) reducing interference and noise contributions (not relevant for this use case), (b) increasing the transmit power (not possible for this use case due to satellite PFD limitations), and (c) increasing the energy received per bit (by reducing the payload or extending the transmission time). The latter is usually achieved by introducing repetition of the channel to be enhanced. In the current 5G NR specifications, repetition of Type0A / 1 / 2 / 3 common search space (CSS) and UE-specific search space (USS) PDCCH has been specified for the multiple transmission reception point (TRP) feature, and its mechanism, at least for PDCCH channels in radio resource control (RRC) connected mode, can be extended to NTN.

[0044] In order to improve the physical layer performance of the channel, a commonly used approach is to allocate more resources for a certain number of bits for the transmission of data or control channels (for data and / or control channels). To achieve this, one way is to transmit the payload data repeatedly multiple times, so that the receiver has the opportunity to combine the received signal and improve the reliability of the demodulated and decoded bits. Based on this, when enhancing the coverage of Type0-PDCCH, one of the methods that can be followed is to repeat the Type0-PDCCH multiple times in the same or different time slots, so that the UE receiver can combine the received Type0-PDCCH single transmission. However, in order to be able to combine multiple Type0-PDCCH repetitions, the UE needs to know at least whether the gNB is transmitting repetitions and how many repetitions are transmitted, so as to know the time span of the Type0-PDCCH repetitions.

[0045] According to some example embodiments of the present disclosure, a scheme for PDCCH repetition is provided. Specifically, a network device transmits system information to a terminal device, the system information including parameters related to a common search space set with repeated PDCCH. The terminal device determines the configuration of the common search space set with repeated PDCCH based on the parameters. The terminal device 110 also monitors the repeated set of PDCCH based on the configuration. In this way, coverage enhancement can be improved.

[0046] According to some example embodiments of the present disclosure, a scheme for PDCCH repetition is provided. Specifically, a terminal device determines a transmission resource for a repetition set of a physical downlink control channel (PDCCH). The repetition set may be an intra-time slot repetition set. Alternatively or additionally, the repetition set may be a repetition across two consecutive time slots. The terminal device monitors the repetition set of the PDCCH from the network device based on the transmission resource. In this way, the latency of the terminal device can be reduced, and the buffer size of the terminal device can also be reduced.

[0047] Figure 1 An example communication environment 100 is shown in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices (including a first device 110 and a second device 120) can communicate with each other.

[0048] In the following, for the purpose of illustration, some example embodiments are described, in which the first device 110 is a terminal device and the second device 120 is a network device. However, in some example embodiments, the operations described in conjunction with the terminal device may be implemented at a network device or other device, and the operations described in conjunction with the network device may be implemented at a terminal device or other device.

[0049] The first device 110 can receive downlink control information (DCI) carried by the repeated Type0-PDCCH CSS set, that is, a Rel-19 NTN UE capable of Type0-PDCCH repetition, which can also be referred to as a Type 1 UE. The communication environment 100 can also include other terminal devices that cannot receive DCI carried by the repeated Type0-PDCCH CSS set, including traditional UEs and Rel-19 NTN UEs that cannot receive repeated Type0-PDCCH, which can be referred to as Type 2 UEs.

[0050] In some example embodiments, where the first device 110 is a terminal device and the second device 120 is a network device, the link from the second device 120 to the first device 110 is referred to as a downlink (DL), and the link from the first device 110 to the second device 120 is referred to as an uplink (UL). In the DL, the second device 120 is a transmission (TX) device (or transmitter) and the first device 110 is a reception (RX) device (or receiver). In the UL, the first device 110 is a TX device (or transmitter) and the second device 120 is an RX device (or receiver).

[0051] Communications in the communication environment 100 may be implemented according to any appropriate communication protocol, including but not limited to cellular communication protocols of the first generation (1G), second generation (2G), third generation (3G), fourth generation (4G), fifth generation (5G), sixth generation (6G), etc., wireless local area network communication protocols such as Institute of Electrical and Electronics Engineers (IEEE) 802.11, and / or any other protocol currently known or developed in the future. In addition, communications may use any appropriate wireless communication technology, including but not limited to: code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), frequency division duplex (FDD), time division duplex (TDD), multiple input multiple output (MIMO), orthogonal frequency division multiple access (OFDM), discrete Fourier transform spread OFDM (DFT-s-OFDM) and / or any other technology currently known or developed in the future.

[0052] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0053] Reference now Figure 2 , which shows a signaling diagram 200 for communication according to some example embodiments of the present disclosure. Figure 2 As shown, the signaling diagram 200 involves a first device 110 and a second device 120. For the purpose of discussion, reference is made to Figure 1 Signaling diagram 200 is described.

[0054] The second device 120 may transmit 2010 a master information block (MIB) to the first device 110. In other words, the first device 110 may receive the MIB from the second device 120.

[0055] The first device 110 can obtain a control resource set (CORESET) and a search space (ie, an area in a downlink resource grid that can carry a PDCCH, in which the UE performs blind decoding to try to find PDCCH data) for Type0-PDCCH based on the MIB parameters. For example, during a cell search, the first device 110 may determine from the MIB that there is a CORESET for a Type0-PDCCH common search space (Type0-PDCCH CSS) set, and the first device 110 may determine from controlResourceSetZero in pdcch-ConfigSIB1 the number of consecutive resource blocks and the number of consecutive symbols of the CORESET for the Type0-PDCCH CSS set, as described in Tables 13-1 to 13-10 in Technical Specification (TS) 38.213 for operation without shared spectrum channel access in frequency range (FR) 1 and FR2-1, or as described in Tables 13-1A and 13-4A in TS 38.213 for operation with shared spectrum channel access in FR1, or as described in TS 38.213. 38.213, as described in Table 13-10A in FR2-2 for operation with shared spectrum channel access, and determining the PDCCH monitoring timing from seachSpaceZero in pdcch-ConfigSIB1 (contained in the MIB), as described in Tables 13-11 to 13-15A for operation with shared spectrum channel access in the MIB.

[0056] like FIG. 3A to FIG. 3C As shown, there are three schemes for multiplexing SS PBCH blocks (SSBs) and CORESET0, namely the so-called multiplexing modes. Figure 3A FIG. 1 shows a schematic diagram of SS PBCH block and CORESET0 multiplexing mode 1. Figure 3A As shown, SS PBCH block 320 may be transmitted in time slot n, and CORESET0 310 may be transmitted in time slot n+0 or a subsequent time slot, where O is an integer. SS PBCH block 320 and CORESET 310 may overlap in the frequency domain. Figure 3B FIG. 2 shows a schematic diagram of SS PBCH block and CORESET0 multiplexing mode 2. Figure 3B As shown, SS PBCH block 320 may be transmitted in time slot n and CORESET0 310 may be transmitted in the previous time slot of time slot n, where n is an integer. Figure 3C FIG. 4 shows a schematic diagram of SS PBCH block and CORESET0 multiplexing mode 3. Figure 3CAs shown, SS PBCH block 320 may be transmitted in time slot n, and CORESET0 310 may be transmitted in time slot n. SSPBCH block 320 and CORESET 310 may overlap in the time domain. In some embodiments, according to Tables 13-13 to 13-15A in TS 38.213, for SSB / CORESET0 multiplexing mode 3, they may be in the same time slot, and for multiplexing mode 2, they may be in the same time slot or on two consecutive time slots.

[0057] In some embodiments, for SSPBCH blocks and CORESET0 multiplexing mode 1, the number of search space sets can be set to 1 or 2, associated with 1 or 2 SSB indices, respectively. When the number of search space sets per time slot is 2, there may be two options for the position occupied by each CSS set (associated with an SSB index) within the time slot. One option may be that the two CSS sets occupy consecutive symbols. A second possible option is that one CSS set occupies a set of consecutive symbols in the first half of the time slot, and the other CSS set occupies another set of consecutive symbols in the second half of the time slot.

[0058] Figure 4A It shows that there may be a CSS set in each time slot. At this time, the number of symbols of CORESET0 is 3, that is, Figure 4B It is shown that there may be 2 CSS sets per time slot and If Figure 4B As shown, with SSBs with even indices ( Figure 4B The first symbol of the CSS set associated with the SSB i in the time slot starts from the first symbol of the time slot (i.e., OFDM symbol index 0), and is associated with the SSB with an odd index ( Figure 4B The first symbol of the CSS set associated with SSB i+1 in (i+1) starts immediately after the last symbol of the previous CSS set. In other words, two CSS sets (i.e., two CORESETs) are assigned to consecutive (back-to-back) OFDM symbols. In some other embodiments, such as Figure 3C As shown, with SSBs with even indices ( Figure 4C The first symbol of the CSS set associated with the SSB i in the time slot may start from the first symbol of the time slot (i.e., OFDM symbol index 0), and the first symbol of the CSS set associated with the SSB with an odd index (i.e., Figure 4B The first symbol of the CSS set associated with SSB i+1 in OFDM symbol index may start from OFDM symbol index 7 (i.e., the first symbol of the second half of the slot).

[0059] It can be assumed that the half frame with the SS / PBCH block of the first device 110 appears with a period of 2 frames. In other words, the minimum period of the SSB may be 2 frames (20 ms), i.e. in Specified by Table 4.3.2-1 in 38.211 as follows.

[0060] In some embodiments, according to Tables 13-13 and 13-14 in TS 38.123 shown below, for SSB / CORESET0 multiplexing mode 2, the first device 110 may determine the first symbol index in the following manner: Table 13-13: PDCCH monitoring timing for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing mode 2 and {SS / PBCH block, PDCCH}SCS{120,60}kHz Table 13-14: PDCCH monitoring timing for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing mode 2 and {SS / PBCH block, PDCCH}SCS{240,120}kHz

[0061] Figure 5A Figure 2 shows a schematic diagram of SSB and CORESET multiplexing mode 2. Figure 5A As shown, the subcarrier spacing (SCS) of the SSB may be 120 kHz, and the SCS of the PDCCH may be 60 kHz. CORESET 510-1 and CORESET 510-2 may correspond to SSB 520-1 and SSB 520-2, respectively. CORESET 511-1 and CORESET 511-2 may correspond to SSB521-1 and SSB 521-2, respectively. According to the following two tables (i.e., Tables 13-7 and 13-10 in TS 38.123), in which frequency domain resources for COERSET0 in multiplexing mode 2 are configured, there may be reserved index pairs that can be reused to repeat a specific configuration. Table 13-7: Resource block set and slot symbol set for CORESET of Type0-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is {120, 60} kHz Table 13-10: Resource block set and slot symbol set for CORESET of Type0-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is {240, 120} kHz

[0062] In some embodiments, according to Tables 13-15 and 13-15A in TS 38.123 shown below, for SSB / CORESET0 multiplexing mode 3, the first device 110 may determine the first symbol index in the following manner: Table 13-15: PDCCH monitoring timing for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing mode 3 and {SS / PBCH block, PDCCH}SCS{120,120}kHz Table 13-15A: PDCCH monitoring timing for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing mode 3 and {SS / PBCH block, PDCCH}SCS {480, 480}kHz or {960, 960}kHz

[0063] Figure 5B Figure 2 shows a schematic diagram of SSB and CORESET multiplexing mode 3. Figure 5B As shown, the SCS of the SSB may be 120 kHz, and the SCS of the PDCCH may be 120 kHz. CORESET 530-1 and CORESET 530-2 may correspond to SSB 540-1 and SSB 540-2, respectively. CORESET 531-1 and CORESET 531-2 may correspond to SSB 541-1 and SSB 541-2, respectively.

[0064] The first device 110 may determine (2020) transmission resources for a repetition set of a PDCCH. In some embodiments, the repetition set is an intra-slot repetition set. Alternatively or additionally, the repetition set is a repetition set within two consecutive slots. The first device 110 may also determine an initial transmission resource set for an initial transmission of the PDCCH. The first device 110 may also monitor (2030) a repetition set of the PDCCH from the second device 120 based on the determined transmission resources. In other words, the second device 120 transmits a repetition set of the PDCCH to the first device 110.

[0065] In some example embodiments, the Type0-PDCCH CSS set in the monitoring opportunity time slot can be extended to determine the repeated transmission resources of the PDCCH. For example, the Type0-PDCCH CSS can be extended for the repetition of transmitting the PDCCH, that is, the repeated CSS is associated with the original CSS used for the initial transmission of the PDCCH. In this case, the first device 110 as a Type1 UE can monitor the repeated CSS to improve the Type0-PDCCH reception performance. Other devices as Type2 UEs can monitor the original Type0-PDCCH CSS and ignore the CSS associated therewith. As an example, the CSS set corresponding to the original CSS can be represented as The CSS for repetition can be expressed as Where K represents the number of repetitions, and Can represent the starting symbol index and CSS respectively In the following description, K intra-slot It can be replaced by parameter K to indicate the number of repetitions (i.e., repetition factor). In this case, Type 2 UE can monitor the fallback mechanism for backward compatibility. The first device 110 may monitor the repeated symbol.

[0066] In some example embodiments, the Type0-PDCCH CSS set in the monitoring opportunity slot can be extended to determine the transmission resources of the repetition of the PDCCH. For example, by extending the first symbol index field to multiple values ​​for the SSB index, the Type0-PDCCH CSS can be extended to transmit the repetition of the PDCCH. For example, for the first row of Tables 13-15 in TS 38.213, the first symbol index field can be modified as shown in Table 1, where each value of the first symbol index consists of two values, indicating the first symbol index in the slot used for PDCCH initial transmission and PDCCH repetition. Table 1. Example of modified Tables 13-15 for transmitting PDCCH repetitions

[0067] In some example embodiments, the Type0-PDCCH CSS set in the monitoring opportunity slot can be extended to determine the transmission resources for the repetition of the PDCCH. For example, by extending the first symbol index field to multiple values ​​for the SSB index, the Type0-PDCCH CSS can be extended to transmit the repetition of the PDCCH. For example, for the first row of Table 13-11 (shown later) in TS 38.213, for M=1, the first symbol index field can be modified as shown in Table 2, where the value of the first symbol index consists of two values, indicating the first symbol index in the slot used for PDCCH initial transmission and PDCCH repetition. Table 2. Example of modified Table 13-11 for transmitting PDCCH repetitions

[0068] In some example embodiments, the Type0-PDCCH CSS set in the monitoring opportunity slot can be extended to determine the transmission resources for the repetition of the PDCCH. For example, by extending the first symbol index field to multiple values ​​for the SSB index, the Type0-PDCCH CSS can be extended to transmit the repetition of the PDCCH. For example, for the second row in Table 13-11 in TS 38.213, for M=1 / 2, the first symbol index field can be modified as shown in Table 3, where the value of the first symbol index per SSB index i consists of two values, indicating the first symbol index in the slot used for PDCCH initial transmission and PDCCH repetition. Table 3. Example of modified Table 13-11 for transmitting PDCCH repetitions

[0069] Alternatively, the frequency resources of CORESET0 can be extended to determine the repeated transmission resources. In other words, other dedicated CORESET0 can also be used for PDCCH repetition.

[0070] In some example embodiments, first device 110 may determine a repetition factor for the PDCCH based on the determined transmission resources. For example, first device 110 may determine a number of transmissions for the PDCCH, including an initial transmission and repeated transmissions of the PDCCH. As an example, for SSB / CORESET0 multiplexing mode 1, the intra-slot repetition factor may be based on the configured CORESET0 The number of symbols and slots in the CSS set to determine the number.

[0071] In an example embodiment, the first device 110 may determine the transmission resources for the repetition set of the PDCCH based on the number of symbols per time slot, the number of symbols associated with the control resource set (e.g., CORESET 0) of the PDCCH, and the number of search space sets per time slot. For example, the number of repetitions (K intra-slot ) (i.e., the repetition factor) can be calculated based on Determine, among which represents the number of symbols per slot (e.g., 14), Indicates the number of symbols for each CORESET0 in Tables 13-1 to 13-10 of TS 38.213, Indicates the number of search space sets in Tables 13-1 to 13-12a in TS 38.213. For example, in Table 13-11 in TS 38.213 (multiplexing mode 1), Index 1 can be configured as: Repeat times can be Fig. 6A In this case, the first device 110 can Fig. 6A The second device 120 may monitor the repetition set at the repetition timing shown in Fig. 6A The repetition set is transmitted on the repetition occasion shown in . The term "candidate PDCCH" used herein may refer to an allocated PDCCH resource for transmission of downlink control information (DCI). Table 13-11: Parameters for PDCCH monitoring opportunities for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing mode 1 and FR1

[0072] In another example embodiment, the first device 110 may determine the transmission resources for the repetition set of the PDCCH based on the number of symbols per time slot, the number of symbols associated with the control resource set of the PDCCH, the number of search space sets per time slot, and the number of symbols reserved for the scheduled transmission of the physical downlink shared channel (PDSCH). For example, the repetition factor (K intra-slot ) can be based on Determine, among which Indicates the number of symbols reserved for PDSCH. As an example, in Table 13-11 in TS 38.213 (multiplexing mode 1), index 1 can be configured as: Repeat times can be Figure 6B In this case, the first device 110 can Figure 6B The second device 120 can monitor the repetition set at the repetition occasion shown. Figure 6B The repetition sets are transmitted at the repetition timing shown in .

[0073] In another example embodiment, the first device 110 may determine the transmission resources for the repetition set of the PDCCH based on the number of symbols per time slot, the number of symbols associated with the control resource set of the PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the SSB. For example, the repetition factor ( The search space set in a time slot) can be determined as follows: in, represents the number of symbols per time slot (such as 14), Indicates the number of symbols for CORESET0 in Tables 13-1 to 13-10 in TS 38.213, Indicates the number of search space sets in Tables 13-11 to 13-12a in Table 38.213.

[0074] As an example, Index 1 in Table 13-11 is configured as: Repeat times can be Figure 6C In this case, the first device 110 can Figure 6C The second device 120 can monitor the repetition set at the repetition occasion shown. Figure 6C As another example, index 1 in Table 13-11 is configured as: Repeat times can be Fig.6D In this case, the first device 110 can Fig.6D The second device 120 may monitor the repetition set at the repetition timing shown in Fig.6D The repetition sets are transmitted at the repetition timing shown in .

[0075] In an example embodiment, the transmission resources for the repetition set of the PDCCH may be predefined. For example, in order to have enough symbols when transmitting SIB1 in the PDSCH scheduled by Type0-PDCCH, at least 2 repetitions are proposed. In some example embodiments, the predefined transmission resources may be defined in the time domain according to the starting symbol index in the time slot, as shown in the example in Table 1. Alternatively, the first device 110 may determine the transmission resources for the repetition set of the PDCCH based on the starting symbol index and the time domain offset of the PDCCH in the time slot. In the latter case, the first device 110 may determine the time domain offset based on the number of symbols associated with the search space set of the PDCCH. In some embodiments, the time slot may be the same time slot of the initial transmission of the PDCCH (or also referred to as PDCCH in this application). Alternatively, the time slot may be the next consecutive time slot of the time slot of the PDCCH (i.e., the time slot in which the initial transmission of the PDCCH is received / transmitted). In some other example embodiments, the time slot may be the previous time slot of the time slot of the PDCCH.

[0076] In an example embodiment, for example, for multiplexing mode 3, the starting symbol index within a time slot may be 0. Alternatively, the starting symbol index within a time slot may be 12. In another example embodiment, the starting symbol index within a time slot may be 2. In another example embodiment, the starting symbol index within a time slot may be 10. In an example embodiment, the starting symbol index within a time slot may be 7.

[0077] In another example embodiment, the starting symbol index within a time slot may be equal to the number of symbols associated with the search space set of the PDCCH (i.e., the number of symbols of the CORESET associated with the search space set of the PDCCH). For example, for multiplexing mode 1, in response to the presence of one PDCCH repetition and one CSS within the time slot, the repetition of the PDCCH may be transmitted / received immediately after the initial transmission of the PDCCH. Alternatively, in response to the presence of one PDCCH repetition and two CSSs within the time slot, the starting symbol index within the time slot may be equal to twice the number of symbols associated with the search space set of the PDCCH. In another example embodiment, the starting symbol index within the time slot may be the same as the starting symbol index of the initial transmission of the PDCCH.

[0078] In some example embodiments, extended time domain resources may be used for repetition sets of PDCCH. Repetition opportunities associated with a particular SSB may occur in a time slot in a periodic manner, and each repetition opportunity may include multiple symbols. The periodicity and number of symbols may depend on the configuration. For example, for SSB and CORESET0 multiplexing mode 1, i.e., Table 13-11, Table 13-12, and Table 13-12A, there may be 1 CSS set per time slot (e.g. Figure 4A), or there are 2 consecutively occupied CSS sets per time slot (e.g. Figure 4B ). The starting symbol index for repetition may have a time domain offset based on the original CSS set. The time domain offset may depend on the number of symbols of the associated CORESET0 and the number of CSS sets in the time slot. For example, in where K is the repetition factor, For example, for index 0 in Table 13-11 in TS 38.213, like Fig. 6E As shown, corresponding to The starting symbol index of may be {0, 2, 4, 6}, and the time domain offset may be {2}. As another example, for index 1 in Table 13-11 in TS 38.213, The starting symbol index can be determined as follows. Fig. 6F For example, the starting symbol index of the first CSS set for repetition may be {0, 4, 8}, and the starting symbol index of the second CSS set for repetition may be {2, 6, 10}.

[0079] In some example embodiments, within the time slot, there is another search space set corresponding to another PDCCH. In this case, first device 110 may determine another starting symbol index for another PDCCH based on the starting symbol index of the PDCCH, another time domain offset, and the number of search space sets within the time slot. For example, for the configuration of SSB and CORESET0 multiplexing mode 1 in Tables 13-12 and 13-12A, the starting symbol index for repetition may have a time offset based on the original CSS set, and the time offset may depend on the number of symbols of the associated CORESET0 and the number of CSS sets in the time slot. For example in K represents the repetition factor, For example, you can configure index 1 in Table 13-12 in TS 38.213, The starting symbol index can be determined as follows. Figure 6G For example, the starting symbol index of the first CSS set for repetition may be {0, 2}, and the starting symbol index of the second CSS set for repetition may be {7, 9}.

[0080] In some other example embodiments, the first device 110 may determine the time domain resource set for the initial transmission of the PDCCH as the transmission resource for the repetition set of the PDCCH. For example, a symbol set before the symbol set for the initial transmission. For example, in Table 13-15 and Table 13-15A in TS 38.213, for the configuration of SSB and CORESET0 multiplexing mode 3, in order to reserve resources for the PDSCH transmitting SIB1, the repetition can be minimized to 2. The starting symbol index for the repetition may have a time domain offset based on the original CSS set. The time domain offset may depend on the number of symbols associated with CORESET0 in the time slot and the number of CSS sets. As an example, for Table 13-15, the range of symbol indices is [0, 27], which includes 2 PDCCH time slots, and for Table 13-15A, the range of symbol indices is [0, 13], which includes 1 PDCCH time slot.

[0081] In an example embodiment, the starting symbol index within a time slot is 0, 2, at i=4k, i=4k+1, i=4k+3, where k∈{0,1,...,15}, in the same time slot as the corresponding SSB with index i (i.e., n c =n SSB，i ), the starting symbol index is 0, and in the previous time slot (i.e., n c =n SSB，i -1), when i=4k+2, the starting symbol index is 12. In one example, The starting symbol index can be determined as follows. Figure 6H For example, the starting symbol index of the first CSS set for repetition may be {2, 0}, and the starting symbol index of the second CSS set for repetition may be {9, 7}.

[0082] In another example embodiment, at i=2k, i=2k+1, where k∈{0, 1, ..., 31}, and in the same time slot as the corresponding SSB with index i (i.e., n c =n SSB，i ), the starting symbol index in the time slot is 0, 7. In another example, in Table 13-15A, The starting symbol index can be determined as follows. Fig.6IFor example, the starting symbol index of the first CSS set for repetition may be {4, 0}, the starting symbol index of the second CSS set for repetition may be {8, 2}, the starting symbol index of the third CSS set for repetition may be {16, 12}, and the starting symbol index of the fourth CSS set for repetition may be {20, 14}.

[0083] In some example embodiments, the first device 110 may determine a frequency domain resource set different from a frequency domain resource set used for an initial transmission of the PDCCH as a transmission resource for a repetition set of the PDCCH. For example, the transmission resource may be defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain. In some example embodiments, the reference point in the frequency domain is the frequency position of a synchronization signal physical broadcast channel block. Alternatively, the reference point may be the frequency position of a control resource set of the PDCCH. The term "frequency position" as used herein may refer to one of: the lowest frequency of a reference point, the highest frequency of a reference point, or the center frequency of a reference point.

[0084] In an example embodiment, the frequency offset may be predefined so that the transmission resource is at a lower frequency than the frequency of the reference point. In other words, frequency resources with a frequency lower than the original CORESET0 and within the same timing of the original CORESET0 may be used for extension for repetition, for example, for SSB and CORESET0 multiplexing mode 2, i.e., Tables 13-7 and 13-10. In one implementation, the starting symbol for repetition may be the same as the original symbol, i.e., and Determined according to Table 13-13 or 13-14 in TS 38.213. In one implementation, the reserved indexes in Table 13-13 and Table 13-14 may be used to extend CORESET0 for repetition.

[0085] In another example embodiment, the configuration containing multiplexing mode 2, the original indexes 8 to 11 can be extended to extend CORESET0 for Type0-PDCCH repetition. In this way, since Type2 UEs can skip the extended CORESET0, it can automatically support fallback for Type2 UEs. Fig. 7A The extended CORESET0710-1 and the associated offsets are shown in FIG. 710-1. For the offsets of the extended CORESET0, as shown in FIG. Fig. 7A As shown, it can be expressed as Where Offset1 and is an offset, and in Table 13-13 or Table 13-14 in TS 38.213, and Offset1 can be negative. That is, Fig. 7A As shown, offset 730 (ie, Offset2) = offset 740 (ie, Offset1) + the number of resource blocks 750 for CORESET0 710-0 (ie, ).

[0086] In an example embodiment, if Figure 7B As shown, In addition to the original CORESET0 (CORESET0711-0, 721-0, 731-0, and 741-0), the functionality of indexes 8 to 11 can be extended to configure additional CORESET0 (CORESET0711-1, 721-1, 731-1, and 741-1) dedicated to Type-PDCCH repetition. The time domain offset can be determined based on the following table. Table 13-7: Resource block set and slot symbol set for CORESET of Type0-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is {120, 60} kHz

[0087] In another example, if Figure 7C As shown, In addition to the original CORESET0 (CORESET0 711-0, 721-0, 731-0, 741-0, 751-0, 761-0, 771-0, 781-0), the functions of indexes 4 to 7 can be extended to configure an additional CORESET0 (CORESET0 711-1, 721-1, 731-1, 741-1, 751-1, 761-1, 771-1, 781-1) dedicated to Type-PDCCH repetition. Table 13-10: Resource block set and slot symbol set for CORESET of Type0-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is {240, 120} kHz

[0088] In some example embodiments, the frequency offset may be predefined such that the transmission resource is at a higher frequency than the reference point. Fig.7D The extended CORESET0710-1 and the associated offset are shown in FIG. For the offset of the extended CORESET0, it can be expressed as Where Offset1 and is the offset, and In Table 13-13 or Table 13-14 of TS 38.213. That is, Fig.7D As shown, offset 730 (ie, Offset2) = offset 740 (ie, Offset1) - the number of resource blocks 750 for CORESET 0710-0 (ie, ).

[0089] In some example embodiments, the frequency offset is predefined in resource blocks and is indicated by the reserved value of the control resource set 0 in the pdcch-ConfigSIBl parameter. Alternatively, the size of the transmission resource in the frequency domain is the same as CORESET0.

[0090] In some example embodiments, the first transmission resource set is defined according to a first frequency offset relative to a frequency position of a control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to a frequency position of the control resource set of the PDCCH. In some example embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency position of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency position of the control resource set of the PDCCH. For example, Fig. 7E Extended CORESET0 710-1 and 710-2 and associated offsets are shown. For the offset of extended CORESET0, it can be expressed as Where Offset1 and is the offset, and In Table 13-13 or Table 13-14. That is, Fig. 7E As shown, offset 730 (ie, Offset2) = offset 740 (ie, Offset1) - the number of resource blocks 750 for CORESET0 710-0 (ie, ), and offset 760 (ie, Offset3) = offset 740 (ie, Offset1) + the number of resource blocks 750 for CORESET0710-0 (ie, ).

[0091] In yet another embodiment, the transmission resource may be at a lower frequency than the frequency position of the SSB. For example, another frequency resource, whose frequency is lower (below) the associated SSB and in the same timing of the associated SSB (not used for SIB1 transmission), may be extended for Type0-PDCCH repetition. For example, Figure 7FAs shown, there are 2 extended CORESET0s (710-1 and 710-2) and associated offsets.

[0092] In some example embodiments, intra-slot repetition, and / or repetition across two consecutive slots, and inter-slot repetition may coexist. In this case, the first device 110 may determine an inter-slot repetition factor for inter-slot repetition of the PDCCH. The first device 110 may determine an inter-slot repetition factor for the PDCCH based on the configured repetition factor and the repetition factor for repetition.

[0093] For example, for SSB / CORESET0 multiplexing mode 1, the inter-slot repetition factor and slot opportunity list can be expressed as N and In one embodiment, the inter-slot repetition factor (N) may be configured based on the repetition factor (K c ) and a determined replication factor (K intra-slot ) export, For example, Figure 8 The repeating pattern shown, K c =8, K intra-slot =3,

[0094] In some example embodiments, first device 110 may determine a repetition opportunity for inter-slot repetition of the PDCCH based on an inter-slot repetition factor. In one embodiment, the repetition opportunity may be determined based on the inter-slot repetition factor (taking into account repetition coexistence). For example, if there is 1 slot opportunity per system frame number (SFN), the repetition opportunity may be represented as in Indicates frame SFN start In the time slot n0+x, Indicates frame SFN start +2*N, etc. where x can be 0, 1, 4 or 8, depending on the subcarrier spacing (SCS) value μ as described above, and N is the inter-slot repetition factor, i.e.

[0095] In another embodiment, the repetition occasions may be based on the inter-slot repetition factor (taking into account the coexistence of repetitions), and the inter-slot repetition factor is determined. For example, if there are 2 slot opportunities per SFN and n0+x does not overlap with the slot of the next SSB index, in Yes Frame The time slot n0 in ,x can be 1, 4 or 8, depending on the subcarrier spacing (SCS) value μ as described above, N is the inter-time slot repetition factor, that is,

[0096] In some example embodiments, the first device 110 may determine the starting frame of the repetition opportunity for the inter-slot repetition of the PDCCH by: (SFN start -SFN reference )mod(M x2)=0, where N represents the inter-slot repetition factor, if there is 1 slot opportunity per system frame number, M=N, or if there are 2 slot opportunities per system frame number (SFN), For synchronization signal block index in even system frame numbers, SFN reference Indicates SFN0, or for the synchronization signal block index in an odd system frame number, SFN reference For example, depending on the inter-slot repetition factor (taking into account coexistence with repetition), the starting frame number may be determined as SFN1. start , satisfying: (SFN start -SFN reference )mod(M×2)=0, where M=N if there is 1 time slot opportunity per SFN, or if there are 2 time slot opportunities per SFN, For SSB indices with PDCCH monitoring opportunities (PMO) in even SFNs, SFN reference It can be SFN0 (or SFN=0), or for SSB indexes with PMO in odd SFNs, SFN reference It can be SFN1 (or SFN=1), where N is the time slot repetition factor, i.e. As used herein, "PMO" may refer to a set of resources used to monitor a PDCCH.

[0097] In some other example embodiments, the first device 110 may determine that the repetitive opportunity is in the same time slot of the synchronization signal block corresponding to the PDCCH. For example, for SSB / CORESET0 multiplexing mode 2 / 3, according to Tables 13-13 to 13-15A, the CORESET0 opportunity may be in the same time slot of the SSB, i.e., SFN c =SFN SSB，i , n c =n SSB，i , or n c =n SSB，i -1, in Indicates the starting SFN / time slot for Type0-PDCCH repetition. In one embodiment, the inter-time slot repetition factor (N) can be configured according to the repetition factor (K c ) and a determined replication factor (K intra-slot ) export,

[0098] Alternatively, the first device 110 may determine a repetition opportunity in a previous time slot of a synchronization signal block corresponding to the PDCCH. Each repetition time slot repeated between time slots may include the same number of repetitions, including intra-repetitions and / or repetitions across two consecutive time slots. In another embodiment, when determining K intra-slot Meet K c mod K intra-slot =0, in other words, each repetition time slot may include the same number of intra-slot repetitions. Therefore, since there is no ambiguity, the first device 110 can monitor the repetition opportunity from any potential opportunity. For example, K c =8, K intra-slot Should be an even number, such as K intra-slot =2, so each repetition opportunity time slot contains 2 repetitions, and the first device 110 can monitor and receive from any repetition opportunity.

[0099] In some example embodiments, the first device 110 may determine a repetitive time slot pattern for inter-slot repetition of the PDCCH based on the repetition opportunity, the inter-slot repetition factor, and the number of slots in the system frame number. In yet another embodiment, the repetitive time slot pattern may be expressed as in is the number of time slots per frame for a given μ (Table 4.3.2-1 in TS 38.211).

[0100] 9A to 9C 2 shows a signaling diagram for communication according to some example embodiments of the present disclosure. 9A to 9C As shown, the signaling diagram involves a first device 110 and a second device 120. For the purpose of discussion, reference is made to Figure 1 and FIG. 10A to FIG. 10C The signaling diagram 200 is described with reference to the repetition within a time slot for the purpose of illustration only. 9A to 9C It should be noted that 9A to 9C The same applies to repetitions spanning two consecutive time slots.

[0101] like Fig. 9A As shown, the second device 120 can configure (9010) the repetition factor, CORESET0 and CSS according to ssb-SubcarrierOffset (k_ssb), ControlResourceSetZero and SearchSpaceZero in the MIB. In other words, the first device 110 can obtain the MIB from the second device 120.

[0102] The second device 120 may transmit (9020) a PSS / SS / PBCH block (SSB) with k_ssb=30, ControlResourceSetZero is set to '1000', and SearchSpaceZeroset is '1001'. In this case, the 2 most significant bits (MSBs) of ControlResourceSetZero are set to '10', which may indicate a repetition factor of 4, and the 2 least significant bits (LSBs) of ControlResourceSetZero are set to '00', which means CORESET configuration index = 0. In addition, the 1MSB of SearchSpaceZeroset is set to '1', which means repetition is activated, and the 3LSBs of SearchSpaceZeroset are set to '111', which means search space configuration index = 7.

[0103] The first device 110 may perform (9030) a frequency band scan and achieve synchronization, such as frequency and frame synchronization, with the gNB. The first device 110 as a Type 1 UE may obtain (9040) intra-slot and inter-slot repetitions activated for the first device 110, the repetition factor is 4, and the frequency domain offset between the first SSB and the overall resource block grid, in terms of the number of subcarriers, is equal to a specified value of 0 subcarriers. It can be understood that for other devices as Type 2 UEs, there is no SSB associated with CORESET0, and there is CORESET0 associated with the second SSB. The first device 110 may determine (9050) frequency domain resources based on ControlResourceSetZero and SearchSpaceZeroset.

[0104] The first device 110 may determine (9060) a repetition factor for repetition: (Table 13-4 Index 0), (Table 13-11 Index 7 in TS 38.213), The first device 110 may also determine (9050) the starting symbol index and offset for each search space set in the time slot: The starting symbol index can be determined according to the following table.

[0105] The first device 110 may monitor (9070) the corresponding SFN c / n0 (PDCCH SFN and time slot). For example, time slot 14 in 2 SFNs (i.e., SFN #0 and 2) has 4 repetition opportunities, the first 3 opportunities are in SFN #0, and the last opportunity is in SFN #2. The first device 110 may perform (9080) reception of Type 0-PDCCH and corresponding SIB1. The corresponding repetition opportunities may be as follows Fig. 10A shown.

[0106] like Fig. 9B As shown, the second device 120 can configure (9010) the repetition factor CORESET0 and CSS according to ssb-SubcarrierQffset (k_ssb), ControlResourceSetZero and SearchSpaceZero in the MIB. In other words, the first device 110 can obtain the MIB from the second device 120.

[0107] The second device 120 may transmit (9120) an SS / PBCH block (SSB) with k_ssb=30, ControlResourceSetZero is set to '1100', and SearchSpaceZeroset is '1000'. In this case, the 1MSB of the ControlResourceSetZero set = '1', which means that intra-slot repetition is activated. The 3LSB of the ControlResourceSetZero set = '100', which means the CORESET configuration index = 4. The 2MSB of the SearchSpaceZero set = '10', which means the repetition factor = 4. The 2LSB of the SearchSpaceZero set = '00', which means the common search space index = 0. The first device 110 may perform (9030) a frequency band scan and achieve synchronization with the second device 120, such as frequency and frame synchronization.

[0108] The first device 110 as a Type 1 UE may obtain (9040) activated intra-slot and inter-slot repetitions, a repetition factor of 4, and a frequency domain offset between the first SSB and the overall resource block grid, in terms of the number of subcarriers, equal to a specified value of 0 subcarriers. It will be appreciated that for a Type 2 UE, there is no SSB associated with CORESET0, and there is CORESET0 associated with a second SSB.

[0109] The first device 110 may determine (9050) frequency domain resources according to ControlResourceSetZero and SearchSpaceZero. The first device 110 may determine (9060) a repetition factor for repetition: (Table 13-8 Index 4 in TS 38.213), (Table 13-15 Multiplexing mode 3 in TS 38.213, SCS {120k, 120k}) The first device 110 may also determine (9050) a starting symbol index and offset for a corresponding search space set in a time slot: The starting symbol index may be determined as shown in the following table. The first device 110 may also determine (9050) an inter-slot repetition factor Since for SCS = 120kHz, The time slot opportunity is {n c , n c +160}.

[0110] The first device 110 may monitor (9070) the corresponding SFN c / n0 (PDCCH SFN and time slot) Type0-PDCCH repetition (step 6-c) and starting symbol index / offset (step 6-b). For example, there are 4 repetition opportunities in the same time slot 15 as the associated SSB in 2 frames (i.e., SFN#0 and SFN#1), the first 2 opportunities are in the first half of SFN#0, and the last 2 opportunities are in the first half of SFN#1. The first device 110 can perform (9080) reception of Type0-PDCCH and corresponding SIB1. The corresponding repetition opportunity can be as follows Fig. 10B shown.

[0111] like Fig. 9C As shown, the second device 120 can configure (9010) the repetition factor CORESET0 and CSS according to ssb-SubcarrierOffset (k_ssb), ControlResourceSetZero and SearchSpaceZero in the MIB. In other words, the first device 110 can obtain the MIB from the second device 120.

[0112] The second device 120 may transmit (9220) a PSS / SS / PBCH block (SSB) with k_ssb=30, ControlResourceSetZero is set to '1110', and SearchSpaceZeroset is '1000'. In this case, the 1MSB of the ControlResourceSetZero set = '1', which means that intra-slot repetition is activated. The 3LSB of the ControlResourceSetZero set = '110', which means that the CORESET configuration index = 6. The 2MSB of the SearchSpaceZero set = '10', which means that the repetition factor is 4. The 2LSB of the SearchSpaceZero set = '00', which means that the common search space index = 0.

[0113] The first device 110 may perform (9030) a frequency band scan and achieve synchronization, such as frequency and frame synchronization, with the gNB. The first device 110 as a Type 1 UE may obtain (9040) intra-slot and inter-slot repetitions activated for the first device 110, with a repetition factor of 4, and a frequency domain offset between the first SSB and the overall resource block grid, in terms of the number of subcarriers, equal to a specified value of 0 subcarriers. It can be understood that for other devices as Type 2 UEs, there is no SSB associated with CORESET0, and there is CORESET0 associated with the second SSB. The first device 110 may determine (9050) frequency domain resources based on ControlResourceSetZero and SearchSpaceZero.

[0114] The first device 110 may determine (9260) an intra-slot repetition factor: (Table 13-10 Index 6 in TS 38.213), (Table 13-14 Mode 2 in TS 38.213, SCS {240k, 120k}), K intra-slot = 2. The first device 110 may determine (9260) a starting symbol index and offset for a corresponding search space set in a time slot: The starting symbol index can be determined according to the following table.

[0115] The first device 110 may determine (9260) an inter-slot repetition factor Since for SCS = 240kHz, The time slot opportunity is {n c , n c+320}. The first device 110 may determine (9260) that the repeated frequency domain resources include the original CORE SET0 and the extended CORE SET0.

[0116] The first device 110 may monitor (9070) the corresponding SFN c / n0 (PDCCH SFN and time slot) Type0-PDCCH repetition (step 6-c) and starting symbol index / offset. For example, there are 4 repetition opportunities in the same time slot 15 as the associated SSB in 2 frames (i.e., SFN#0 and SFN#1), the first 2 opportunities are in the first half of SFN#0, and the last 2 opportunities are in the first half of SFN#1. The first device 110 can perform (9080) reception of Type0-PDCCH and corresponding SIB1. The corresponding repetition opportunity can be as follows Fig. 10C shown.

[0117] Fig.11 A flowchart of an example method 1100 implemented at a first device according to some example embodiments of the present disclosure is shown. For the purpose of discussion, Figure 1 The method 1100 is described from the perspective of the first device 110.

[0118] At block 1110, the apparatus determines transmission resources for a repetition set of a physical downlink control channel (PDCCH). In some example embodiments, the repetition set is an intra-slot repetition set. In some example embodiments, the repetition set is a repetition set within two consecutive slots.

[0119] At block 1120, the apparatus monitors a repetition set of the PDCCH from the network device based on the determined transmission resources. In some example embodiments, the method 1100 further includes determining transmission resources for the repetition set of the PDCCH based on the number of symbols per time slot, the number of symbols associated with the search space set of the PDCCH, and the number of search space sets per time slot.

[0120] In some example embodiments, method 1100 further includes determining transmission resources for a repetition set of PDCCH based on the number of symbols per time slot, the number of symbols associated with a search space set for the PDCCH, the number of search space sets per time slot, and the number of symbols reserved for transmission of a scheduled physical downlink shared channel (PDSCH).

[0121] In some example embodiments, method 1100 further includes determining transmission resources for a repetition set of the PDCCH based on the number of symbols per time slot, the number of symbols associated with a search space set of the PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the SSB.

[0122] In some example embodiments, the method 1100 further includes receiving a master information block from a network device, the master information block indicating at least one parameter related to an intra-slot repetition set of the PDCCH.

[0123] In some example embodiments, the method 1100 further includes determining an intra-slot repetition factor for the PDCCH based on the determined transmission resources.

[0124] In some example embodiments, the transmission resources for the repetition set of the PDCCH are predefined.

[0125] In some example embodiments, the predefined transmission resource is defined in the time domain according to a starting symbol index within a slot. The slot is the same slot of the PDCCH, or the next consecutive slot of the slot of the PDCCH, or the previous slot of the slot of the PDCCH.

[0126] In some example embodiments, the starting symbol index within a time slot is 0. In some example embodiments, the starting symbol index within a time slot is 2. In some example embodiments, the starting symbol index within a time slot is 10. In some example embodiments, the starting symbol index within a time slot is 7. In some example embodiments, the starting symbol index within a time slot is 12. In some example embodiments, the starting symbol index within a time slot is equal to the number of symbols associated with the search space set of the PDCCH. In some example embodiments, the starting symbol index within a time slot is equal to twice the number of symbols associated with the search space set of the PDCCH. In some example embodiments, the starting symbol index within a time slot is the same as the starting symbol index of the PDCCH.

[0127] In some example embodiments, the method 1100 further includes determining a transmission resource for a repetition set of the PDCCH based on a starting symbol index and a time domain offset of the PDCCH within the time slot.

[0128] In some example embodiments, the method 1100 further comprises determining a time domain offset based on a number of symbols associated with a search space set of the PDCCH.

[0129] In some example embodiments, the transmission resources are defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain.

[0130] In some example embodiments, the reference point in the frequency domain is the frequency location of a synchronization signal physical broadcast channel block or the frequency location of a control resource set of a PDCCH.

[0131] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a lower frequency than the frequency of the reference point.

[0132] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a higher frequency than the frequency of the reference point.

[0133] In some example embodiments, the frequency offset is predefined in units of resource blocks and is indicated by the reserved value of control resource set 0 in the pdcch-ConfigSIB1 parameter.

[0134] In some example embodiments, the size of the transmission resource in the frequency domain is the same as the size of the PDCCH.

[0135] In some example embodiments, the first transmission resource set is defined according to a first frequency offset relative to the frequency location of a control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to the frequency location of the control resource set of the PDCCH.

[0136] In some example embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency location of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency location of the control resource set of the PDCCH.

[0137] In some example embodiments, the apparatus is a terminal device.

[0138] Fig.12 A flowchart of an example method 1200 implemented at a second device according to some example embodiments of the present disclosure is shown. For the purpose of discussion, Figure 1 The method 1200 is described from the perspective of the second device 120.

[0139] In some example embodiments, at block 1210, the second device 120 may transmit a master information block (MIB) to the first device 110. In other words, the first device 110 may receive the MIB from the second device 120.

[0140] At block 1220, the apparatus transmits a repetition set of a physical downlink control channel (PDCCH) to a terminal device based on the transmission resource. In some example embodiments, the repetition set is an intra-slot repetition set. In some example embodiments, the repetition set is an intra-two consecutive slot repetition set.

[0141] In some example embodiments, transmission resources for a repetition set of a PDCCH are determined based on the number of symbols per slot, the number of symbols associated with a search space set for the PDCCH, and the number of search space sets per slot.

[0142] In some example embodiments, transmission resources for a repetition set of the PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with a search space set for the PDCCH, the number of search space sets per time slot, and the number of symbols reserved for transmission of a scheduled physical downlink shared channel (PDSCH).

[0143] In some example embodiments, transmission resources for a repetition set of a PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with a search space set of the PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the SSB.

[0144] In some example embodiments, the method 1200 further includes: transmitting a master information block to the terminal device, the master information block indicating at least one parameter related to the repetition set of the PDCCH.

[0145] In some example embodiments, a repetition factor for the PDCCH is determined based on the determined transmission resources.

[0146] In some example embodiments, the transmission resources for the repetition set of the PDCCH are predefined.

[0147] In some example embodiments, the predefined transmission resource is defined in the time domain according to a starting symbol index within a time slot. In some example embodiments, the time slot is the same time slot of the PDCCH, or the next consecutive time slot of the time slot of the PDCCH, or the previous time slot of the time slot of the PDCCH.

[0148] In some example embodiments, the starting symbol index within a time slot is 0. In some example embodiments, the starting symbol index within a time slot is 2. In some example embodiments, the starting symbol index within a time slot is 69. In some example embodiments, the starting symbol index within a time slot is 7. In some example embodiments, the starting symbol index within a time slot is 12. In some example embodiments, the starting symbol index within a time slot is equal to the number of symbols associated with the search space set of the PDCCH. In some example embodiments, the starting symbol index within a time slot is equal to twice the number of symbols associated with the search space set of the PDCCH. In some example embodiments, the starting symbol index within a time slot is the same as the starting symbol index of the PDCCH.

[0149] In some example embodiments, the transmission resources for the repetition set of the PDCCH are determined based on the starting symbol index and the time domain offset of the PDCCH within the slot.

[0150] In some example embodiments, the time domain offset is determined based on the number of symbols associated with the search space set of the PDCCH.

[0151] In some example embodiments, the transmission resources are defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain.

[0152] In some example embodiments, the reference point in the frequency domain is the frequency location of a synchronization signal physical broadcast channel block, or the frequency location of a control resource set of a PDCCH.

[0153] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a lower frequency than the frequency of the reference point.

[0154] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a higher frequency than the frequency of the reference point.

[0155] In some example embodiments, the frequency offset is predefined in units of resource blocks and is indicated by a reserved value for control resource set 0 in the pdcch-ConfigSIB1 parameter.

[0156] In some example embodiments, the size of the transmission resource in the frequency domain is the same as the size of the PDCCH.

[0157] In some example embodiments, the first transmission resource set is defined according to a first frequency offset relative to the frequency location of a control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to the frequency location of the control resource set of the PDCCH.

[0158] In some example embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency location of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency location of the control resource set of the PDCCH.

[0159] In some example embodiments, the apparatus is a network device.

[0160] In some example embodiments, any of the methods 1100 can be performed (e.g., Figure 1 The first device of the first device 110 in the embodiment of the present invention may include components for performing the corresponding operations of the method 1100. The components may be implemented in any suitable form. For example, the components may be implemented in a circuit or a software module. The first device may be implemented as or include Figure 1 In the first device 110.

[0161] In some example embodiments, the first apparatus includes: means for determining transmission resources for a repetition set of a physical downlink control channel (PDCCH); and means for monitoring the repetition set of the PDCCH from a network device based on the determined transmission resources.

[0162] In some example embodiments, the repetition sets are intra-slot repetition sets.

[0163] In some example embodiments, the first device also includes: a component for determining transmission resources for a repetition set of PDCCH based on the following items, including: the number of symbols per time slot, the number of symbols associated with the search space set of PDCCH, and the number of search space sets per time slot.

[0164] In some example embodiments, the first device also includes: a component for determining transmission resources for a repetition set of PDCCH based on the following items, including: the number of symbols per time slot, the number of symbols associated with the search space set of PDCCH, the number of search space sets per time slot, and the number of transmission reserved symbols for a scheduled physical downlink shared channel (PDSCH).

[0165] In some example embodiments, the apparatus is provided with: a component for determining transmission resources for a repetition set of a PDCCH based on the number of symbols per time slot, the number of symbols associated with a search space set of the PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the SSB.

[0166] In some example embodiments, the repetition set is a repetition set within two consecutive time slots.

[0167] In some example embodiments, the first apparatus further comprises: means for receiving a master information block from a network device, the master information block indicating at least one parameter related to a repetition set of the PDCCH.

[0168] In some example embodiments, the first apparatus further comprises means for determining a repetition factor for the PDCCH based on the determined transmission resources.

[0169] In some example embodiments, the transmission resources for the repetition set of the PDCCH are predefined.

[0170] In some example embodiments, the predefined transmission resource is defined in the time domain according to a starting symbol index within a time slot. The time slot is the same time slot of the PDCCH, or the next consecutive time slot of the time slot of the PDCCH, or the previous time slot of the time slot of the PDCCH.

[0171] In some example embodiments, the starting symbol index within a slot is 0.

[0172] In some example embodiments, the starting symbol index within a slot is 2.

[0173] In some example embodiments, the starting symbol index within a slot is 10.

[0174] In some example embodiments, the starting symbol index within a slot is 7.

[0175] In some example embodiments, the starting symbol index within a slot is 12.

[0176] In some example embodiments, the starting symbol index within a slot is equal to the number of symbols associated with the search space set for the PDCCH.

[0177] In some example embodiments, the starting symbol index within a slot is equal to twice the number of symbols associated with the search space set for the PDCCH.

[0178] In some example embodiments, the starting symbol index within a slot is the same as the starting symbol index of the PDCCH.

[0179] In some example embodiments, the first apparatus further comprises means for determining transmission resources for a repetition set of the PDCCH based on a starting symbol index and a time domain offset of the PDCCH within a time slot.

[0180] In some example embodiments, the first apparatus further comprises means for determining a time domain offset based on a number of symbols associated with a search space set of the PDCCH.

[0181] In some example embodiments, the transmission resources are defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain.

[0182] In some example embodiments, the reference point in the frequency domain is the frequency location of a synchronization signal physical broadcast channel block, or the frequency location of a control resource set of a PDCCH.

[0183] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a lower frequency than the frequency of the reference point.

[0184] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a higher frequency than the frequency of the reference point.

[0185] In some example embodiments, the frequency offset is predefined in units of resource blocks and is indicated by a reserved value for control resource set 0 in the pdcch-ConfigSIB1 parameter.

[0186] In some example embodiments, the size of the transmission resource in the frequency domain is the same as the size of the PDCCH.

[0187] In some example embodiments, the first transmission resource set is defined according to a first frequency offset relative to the frequency location of a control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to the frequency location of the control resource set of the PDCCH.

[0188] In some example embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency location of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency location of the control resource set of the PDCCH.

[0189] In some example embodiments, the apparatus is a terminal device.

[0190] In some example embodiments, the first apparatus further comprises means for performing the method 1100 or other operations in some example embodiments of the first device 110. In some example embodiments, the means comprises: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the execution of the first apparatus.

[0191] In some example embodiments, any of the methods 1200 can be performed (e.g., Figure 1 The second device 120 in the second device 120 may include components for performing the corresponding operations of the method 1200. The components may be implemented in any suitable form. For example, the components may be implemented in a circuit or a software module. The second device may be implemented as or included in Figure 1 In the second device 120.

[0192] In some example embodiments, the second apparatus comprises means for transmitting a repetition set of a Physical Downlink Control Channel (PDCCH) to the terminal device based on the transmission resource.

[0193] In some example embodiments, the repetition sets are intra-slot repetition sets.

[0194] In some example embodiments, transmission resources for a repetition set of a PDCCH are determined based on the number of symbols per slot, the number of symbols associated with a search space set for the PDCCH, and the number of search space sets per slot.

[0195] In some example embodiments, transmission resources for a repetition set of the PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with a search space set for the PDCCH, the number of search space sets per time slot, and the number of transmission reserved symbols for a scheduled physical downlink shared channel (PDSCH).

[0196] In some example embodiments, transmission resources for a repetition set of a PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with a search space set of the PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the SSB.

[0197] In some example embodiments, the repetition set is a repetition set within two consecutive time slots.

[0198] In some example embodiments, the second apparatus further comprises: means for transmitting a master information block to the terminal device, the master information block indicating at least one parameter related to the repetition set of the PDCCH.

[0199] In some example embodiments, a repetition factor for the PDCCH is determined based on the determined transmission resources.

[0200] In some example embodiments, the transmission resources for the repetition set of the PDCCH are predefined.

[0201] In some example embodiments, the predefined transmission resources are defined in the time domain according to a starting symbol index within a time slot.

[0202] In some example embodiments, the time slot is the same time slot of the PDCCH, or the next consecutive time slot of the time slot of the PDCCH, or the previous time slot of the time slot of the PDCCH.

[0203] In some example embodiments, the starting symbol index within a slot is 0.

[0204] In some example embodiments, the starting symbol index within a slot is 2.

[0205] In some example embodiments, the starting symbol index within a slot is 10.

[0206] In some example embodiments, the starting symbol index within a slot is 7.

[0207] In some example embodiments, the starting symbol index within a slot is 12.

[0208] In some example embodiments, the starting symbol index within a slot is equal to the number of symbols associated with the search space set for the PDCCH.

[0209] In some example embodiments, the starting symbol index within a slot is equal to twice the number of symbols associated with the search space set for the PDCCH.

[0210] In some example embodiments, the starting symbol index within a slot is the same as the starting symbol index of the PDCCH.

[0211] In some example embodiments, the transmission resources for the repetition set of the PDCCH are determined based on the starting symbol index and the time domain offset of the PDCCH within the slot.

[0212] In some example embodiments, the time domain offset is determined based on the number of symbols associated with the search space set of the PDCCH.

[0213] In some example embodiments, the transmission resources are defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain.

[0214] In some example embodiments, the reference point in the frequency domain is the frequency location of a synchronization signal physical broadcast channel block, or the frequency location of a control resource set of a PDCCH.

[0215] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a lower frequency than the frequency of the reference point.

[0216] In some example embodiments, the frequency offset is predefined such that the transmission resource is at a higher frequency than the frequency of the reference point.

[0217] In some example embodiments, the frequency offset is predefined in units of resource blocks and is indicated by a reserved value for control resource set 0 in the pdcch-ConfigSIB1 parameter.

[0218] In some example embodiments, the size of the transmission resource in the frequency domain is the same as the size of the PDCCH.

[0219] In some example embodiments, the first transmission resource set is defined according to a first frequency offset relative to the frequency location of a control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to the frequency location of the control resource set of the PDCCH.

[0220] In some example embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency location of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency location of the control resource set of the PDCCH.

[0221] In some example embodiments, the apparatus is a network device.

[0222] In some example embodiments, the second apparatus further comprises means for performing the method 1200 or other operations in some example embodiments of the second device 120. In some example embodiments, the means comprises: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause execution of the second apparatus.

[0223] Fig.13 1 is a simplified block diagram of a device 1300 suitable for implementing an example embodiment of the present disclosure. The device 1300 may be provided to implement a communication device, such as Figure 1 13. As shown in the figure, the device 1300 includes one or more processors 1310, one or more memories 1320 coupled to the processor 1310, and one or more communication modules 1340 coupled to the processor 1310.

[0224] The communication module 1340 is used for two-way communication. The communication module 1340 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interface may represent any interface necessary for communication with other network elements. In some example embodiments, the communication module 1340 may include at least one antenna.

[0225] Processor 1310 may be of any type suitable for the local technology network and may include one or more of the following: a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture, as non-limiting examples. Device 1300 may have multiple processors, such as application specific integrated circuit chips, which are time-slaved to a clock synchronized with a main processor.

[0226] The memory 1320 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memories include, but are not limited to, read-only memory (ROM) 1324, electrically programmable read-only memory (EPROM), flash memory, hard disk, compact disk (CD), digital video disk (DVD), optical disk, laser disk, and other magnetic storage and / or optical storage. Examples of volatile memories include, but are not limited to, random access memory (RAM) 1322 and other volatile memories that will not persist during a power outage.

[0227] The computer program 1330 includes computer executable instructions executed by the associated processor 1310. The instructions of the program 1330 may include instructions for performing the operations / actions of some example embodiments of the present disclosure. The program 1330 may be stored in a memory, such as ROM 1324. The processor 1310 may perform any suitable actions and processes by loading the program 1330 into the RAM 1322.

[0228] The exemplary embodiments of the present disclosure may be implemented by the program 1330 so that the device 1300 may execute the reference Figures 2 to 12 Any process of the present disclosure discussed. Example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.

[0229] In some example embodiments, the program 1330 may be tangibly embodied in a computer-readable medium, which may be included in the device 1300 (such as in the memory 1320) or in other storage devices accessible by the device 1300. The device 1300 may load the program 1330 from the computer-readable medium to the RAM 1322 for execution. In some example embodiments, the computer-readable medium may include any type of non-transitory storage medium, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. The term "non-transitory" as used herein is a limitation of the medium itself (i.e., tangible, not a signal), not a limitation on the persistence of data storage (e.g., RAM versus ROM).

[0230] Fig.14 An example of a computer readable medium 1400 is shown, which may be in the form of a CD, DVD, or other optical storage disk. Computer readable medium 1400 has program 1330 stored thereon.

[0231] In general, various embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, and other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are illustrated and described as block diagrams, flow charts, or illustrated and described using some other graphical representations, it should be understood that, as non-limiting examples, the boxes, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof.

[0232] Some example embodiments of the present disclosure also provide at least one computer program product tangibly stored on a computer-readable medium (such as, non-volatile computer-readable medium). The computer program product includes computer executable instructions, such as those computer executable instructions executed in a device on a target physical or virtual processor included in a program module, to perform any method as described above. Typically, a program module includes routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of the program modules can be combined or split between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in both local storage media and remote storage media.

[0233] The program code for executing the method of the present disclosure can be written in any combination of one or more programming languages. The program code can be provided to a processor or controller in a general-purpose computer, a special-purpose computer or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be realized. The program code can be executed entirely on the machine, partially on the machine, as an independent software package, partially on the machine and partially on a remote machine, or completely on a remote machine or server.

[0234] In the context of the present disclosure, computer program codes or related data may be carried by any suitable carrier to enable a device, apparatus or processor to perform various processes and operations as described above. Examples of carriers include signals, computer readable media, etc.

[0235] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. More specific examples of computer readable storage media will include an electrical connection with one or more wires, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0236] In addition, although operations are depicted in a particular order, this should not be construed as requiring such operations to be performed in the particular order shown or in a sequential order, or performing all illustrated operations, to achieve the desired result. In some cases, multitasking and parallel processing can be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be interpreted as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specified in a particular embodiment. Unless expressly stated, certain features described in the context of a separate embodiment may also be implemented in combination in a single embodiment. On the contrary, unless expressly stated, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0237] Although the present disclosure has been described in language specific to structural features and / or methodological actions, it should be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or actions described above. Instead, the specific features and actions described above are disclosed as example forms of implementing the claims.

[0238] In some aspects, an apparatus for repetition of a physical downlink control channel is provided, comprising:

[0239] at least one processor; and

[0240] at least one memory storing instructions that, when executed by at least one processor, cause the apparatus to:

[0241] determining transmission resources for a repetition set of a physical downlink control channel (PDCCH); and

[0242] Based on the determined transmission resources, a repetition set of the PDCCH from the network device is monitored.

[0243] In some embodiments, the repetition set is an intra-slot repetition set.

[0244] In some embodiments, the device:

[0245] Transmission resources for the repetition set of the PDCCH are determined based on the number of symbols per slot, the number of symbols associated with the search space set of the PDCCH, and the number of search space sets per slot.

[0246] In some embodiments, the device:

[0247] The transmission resources for the repetition set of PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with the search space set of PDCCH, the number of search space sets per time slot, and the number of symbols reserved for transmission of the scheduled physical downlink shared channel (PDSCH).

[0248] In some embodiments, the device:

[0249] The transmission resources for the repetition set of PDCCH are determined based on the number of symbols per time slot, the number of symbols related to the search space set of PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the synchronization signal physical broadcast channel block.

[0250] In some embodiments, the repetition set is a repetition set within two consecutive time slots.

[0251] In some embodiments, the device:

[0252] A master information block is received from a network device, the master information block indicating at least one parameter related to a repetition set of a PDCCH.

[0253] In some embodiments, the device:

[0254] Based on the determined transmission resources, an intra-slot repetition factor for the PDCCH is determined.

[0255] In some embodiments, the transmission resources for the repetition set of PDCCH are predefined.

[0256] In some embodiments, the predefined transmission resources are defined in the time domain according to a starting symbol index within a time slot, wherein the time slot is the same time slot of the PDCCH, or the next consecutive time slot of the time slot of the PDCCH, or the previous time slot of the time slot of the PDCCH.

[0257] In some embodiments, the starting symbol index within a time slot is 0.

[0258] In some embodiments, the starting symbol index within a time slot is 2.

[0259] In some embodiments, the starting symbol index within a time slot is 10.

[0260] In some embodiments, the starting symbol index within a time slot is 7.

[0261] In some embodiments, the starting symbol index within a time slot is 12.

[0262] In some embodiments, the starting symbol index within a time slot is equal to the number of symbols associated with the search space set of the PDCCH.

[0263] In some embodiments, the starting symbol index within a time slot is equal to twice the number of symbols associated with the search space set of the PDCCH.

[0264] In some embodiments, the starting symbol index within the time slot is the same as the starting symbol index of the PDCCH.

[0265] In some embodiments, the device:

[0266] Based on the starting symbol index and the time domain offset of the PDCCH in the time slot, the transmission resources for the repetition set of the PDCCH are determined.

[0267] In some embodiments, the device:

[0268] The time domain offset is determined based on the number of symbols associated with the search space set of the PDCCH.

[0269] In some embodiments, the transmission resources are defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain.

[0270] In some embodiments, the reference point in the frequency domain is the frequency position of a synchronization signal physical broadcast channel block, or the frequency position of a control resource set of a PDCCH.

[0271] In some embodiments, the frequency offset is predefined such that the transmission resource is at a lower frequency than the frequency of the reference point.

[0272] In some embodiments, the frequency offset is predefined such that the transmission resource is at a higher frequency than the frequency of the reference point.

[0273] In some embodiments, the frequency offset is predefined in resource blocks and is indicated by a reserved value for control resource set 0 in the pdcch-ConfigSIB1 parameter.

[0274] In some embodiments, the size of the transmission resource in the frequency domain is the same as the size of the PDCCH.

[0275] In some embodiments, the first transmission resource set is defined according to a first frequency offset relative to the frequency position of the control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to the frequency position of the control resource set of the PDCCH.

[0276] In some embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency position of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency position of the control resource set of the PDCCH.

[0277] In some embodiments, the apparatus is a terminal device.

[0278] In some aspects, a repeating apparatus for a physical downlink control channel is provided, comprising:

[0279] at least one processor; and

[0280] at least one memory storing instructions that, when executed by at least one processor, cause the apparatus to:

[0281] Based on the transmission resources, a repetitive set of Physical Downlink Control Channel (PDCCH) is transmitted to the terminal device.

[0282] In some embodiments, the repetition set is an intra-slot repetition set.

[0283] In some embodiments, transmission resources for a repetition set of a PDCCH are determined based on the number of symbols per slot, the number of symbols associated with a search space set of the PDCCH, and the number of search space sets per slot.

[0284] In some embodiments, transmission resources for a repetition set of PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with a search space set for the PDCCH, the number of search space sets per time slot, and the number of symbols reserved for transmission of a scheduled physical downlink shared channel (PDSCH).

[0285] In some embodiments, the transmission resources for a repetition set of PDCCH are determined based on: the number of symbols per time slot, the number of symbols associated with a search space set of PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of a synchronization signal physical broadcast channel block.

[0286] In some embodiments, the repetition set is a repetition set within two consecutive time slots.

[0287] In some embodiments, the device:

[0288] A master information block is transmitted to a terminal device, the master information block indicating at least one parameter related to a repetition set of a PDCCH.

[0289] In some embodiments, an intra-slot repetition factor for the PDCCH is determined based on the determined transmission resources.

[0290] In some embodiments, the transmission resources for the repetition set of PDCCH are predefined.

[0291] In some embodiments, the predefined transmission resources are defined in the time domain according to a starting symbol index within a time slot, wherein the time slot is the same time slot of the PDCCH, or the next consecutive time slot of the time slot of the PDCCH, or the previous time slot of the time slot of the PDCCH.

[0292] In some embodiments, the starting symbol index within a time slot is 0.

[0293] In some embodiments, the starting symbol index within a time slot is 2.

[0294] In some embodiments, the starting symbol index within a time slot is 10.

[0295] In some embodiments, the starting symbol index within a time slot is 7.

[0296] In some embodiments, the starting symbol index within a time slot is 12.

[0297] In some embodiments, the starting symbol index within a time slot is equal to the number of symbols associated with the search space set of the PDCCH.

[0298] In some embodiments, the starting symbol index within a time slot is equal to twice the number of symbols associated with the search space set of the PDCCH.

[0299] In some embodiments, the starting symbol index within the time slot is the same as the starting symbol index of the PDCCH.

[0300] In some embodiments, the transmission resource for the repetition set of the PDCCH is determined based on the starting symbol index and the time domain offset of the PDCCH within the time slot.

[0301] In some embodiments, wherein:

[0302] The time domain offset is determined based on the number of symbols associated with the search space set of the PDCCH.

[0303] In some embodiments, the transmission resources are defined in the frequency domain according to a frequency offset relative to a reference point in the frequency domain.

[0304] In some embodiments, the reference point in the frequency domain is the frequency position of a synchronization signal physical broadcast channel block, or the frequency position of a control resource set of a PDCCH.

[0305] In some embodiments, the frequency offset is predefined such that the transmission resource is at a lower frequency than the frequency of the reference point.

[0306] In some embodiments, the frequency offset is predefined such that the transmission resource is at a higher frequency than the frequency of the reference point.

[0307] In some embodiments, the frequency offset is predefined in resource blocks and is indicated by a reserved value for control resource set 0 in the pdcch-ConfigSIB 1 parameter.

[0308] In some embodiments, the size of the transmission resource in the frequency domain is the same as the size of the PDCCH.

[0309] In some embodiments, the first transmission resource set is defined according to a first frequency offset relative to the frequency position of the control resource set of the PDCCH, and the second transmission resource set is defined according to a second frequency offset relative to the frequency position of the control resource set of the PDCCH.

[0310] In some embodiments, the first frequency offset is predefined such that the first transmission resource set is at a lower frequency than the frequency position of the control resource set of the PDCCH, and the second frequency offset is predefined such that the second transmission resource set is at a higher frequency than the frequency position of the control resource set of the PDCCH.

[0311] In some embodiments, the apparatus is a network device.

[0312] In some aspects, a method for repetition of a physical downlink control channel is provided, comprising:

[0313] At the device, determining transmission resources for a repetition set of a physical downlink control channel (PDCCH); and

[0314] Based on the determined transmission resources, a repetition set of the PDCCH from the network device is monitored.

[0315] In some aspects, a method for repetition of a physical downlink control channel is provided, including:

[0316] At the apparatus, a repetitive set of physical downlink control channels (PDCCHs) are transmitted to a terminal device based on transmission resources.

[0317] In some aspects, an apparatus for repetition of a physical downlink control channel is provided, comprising:

[0318] means for determining transmission resources for a repetition set of a physical downlink control channel (PDCCH); and

[0319] Means for monitoring a repetition set of a PDCCH from a network device based on the determined transmission resources.

[0320] In some aspects, an apparatus for repetition of a physical downlink control channel is provided, comprising:

[0321] Means for transmitting, at an apparatus, a repetition set of a physical downlink control channel (PDCCH) to a terminal device based on a transmission resource.

[0322] In some aspects, a computer-readable medium includes instructions stored thereon for causing an apparatus to at least perform the method according to some aspects of the present disclosure.

Claims

1. An apparatus for repetition of a physical downlink control channel, comprising: at least one processor; as well as at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus to: determining a transmission resource for a repetition set of a physical downlink control channel (PDCCH); and Based on the determined transmission resource, a repetition set of the PDCCH from a network device is monitored.

2. The apparatus of claim 1, wherein the repetition set is an intra-slot repetition set.

3. The device according to claim 2, wherein the device: The transmission resources for the repetition set of the PDCCH are determined based on the number of symbols per slot, the number of symbols associated with the search space set of the PDCCH, and the number of search space sets per slot.

4. The device according to claim 2, wherein the device: The transmission resources for the repetition set of the PDCCH are determined based on the number of symbols per time slot, the number of symbols associated with the search space set of the PDCCH, the number of search space sets per time slot, and the number of symbols reserved for transmission of the scheduled physical downlink shared channel (PDSCH).

5. The device according to claim 2, wherein the device: The transmission resources for the repetition set of the PDCCH are determined based on the number of symbols per time slot, the number of symbols related to the search space set of the PDCCH, the number of search space sets, the number of symbols to be reserved, and the index of the synchronization signal physical broadcast channel block. The apparatus according to claim 1 , wherein the repetition set is a repetition set within two consecutive time slots.

7. The device according to claim 1, wherein the device: A master information block is received from the network device, the master information block indicating at least one parameter related to a repetition set of the PDCCH.

8. The device according to claim 1, wherein the device: Based on the determined transmission resource, an intra-slot repetition factor for the PDCCH is determined.

9. The apparatus of claim 1, wherein the transmission resources for the repetition set of the PDCCH are predefined.

10. The apparatus according to claim 9, wherein the predefined transmission resource is defined in the time domain according to a starting symbol index within a time slot, wherein the time slot is the same time slot of the PDCCH, or the next consecutive time slot of the time slot of the PDCCH, or the previous time slot of the time slot of the PDCCH.

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