Devices and methods for communication
Repetition mechanisms and redundancy management for PDCCH and PDSCH transmissions enhance SIB delivery in non-terrestrial networks, addressing coverage issues and improving reliability and efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NEC CORP
- Filing Date
- 2025-01-06
- Publication Date
- 2026-07-09
AI Technical Summary
Existing communication systems face challenges in enhancing the coverage of system information blocks (SIB) such as SIB1, particularly in non-terrestrial networks, where transmission reliability and robustness are compromised.
Implementing repetition mechanisms for PDCCH and PDSCH transmissions, along with redundancy version management and wake-up signal configurations, to enhance SIB transmission in non-terrestrial networks.
Improves the effectiveness and robustness of SIB transmission by ensuring reliable delivery and reducing transmission delays, particularly in challenging environments like NB-IoT networks.
Smart Images

Figure CN2025070812_09072026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR COMMUNICATIONFIELDS
[0001] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for enhancement for system information block (SIB) repetition.BACKGROUND
[0002] In some communication systems, a network device such as a base station may transmit system information to a terminal device such as user equipment (UE) . For example, the system information may be included in a system information block via a physical downlink shared channel (PDSCH) and / or a physical downlink control channel (PDCCH) . In some scenarios, the PDSCH SIB coverage such as system information block one (SIB1) coverage needs to be enhanced. In some mechanisms, it is proposed to transmit repetitions of the SIB such as SIB1 to the terminal device for SIB enhancement.SUMMARY
[0003] In general, embodiments of the present disclosure provide methods, devices and computer storage medium for enhancement for transmission in non-terrestrial network.
[0004] In a first aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the terminal device to: receive, from a network device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a physical downlink control channel (PDCCH) transmission, or a physical downlink shared channel (PDSCH) transmission; and receive, from the network device, at least one repetition of the at least one transmission with SIB based on the indication.
[0005] In a second aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the terminal device to: receive, from a network device, an indication of a first redundancy version (RV) of a transmission with SIB; determine a second RV of a repetition of the transmission; and receive the transmission and the repetition of the transmission from the network device based on the first RV and the second RV.
[0006] In a third aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the terminal device to: receive, from a network device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; and detect the WUS for the PWS indication or notification based on the configuration.
[0007] In a fourth aspect, there is provided a network device. The network device comprises: a processor configured to cause the network device to: transmit, to a terminal device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a physical downlink control channel (PDCCH) transmission, or a physical downlink shared channel (PDSCH) transmission; and transmit, to the terminal device, at least one repetition of the at least one transmission with SIB.
[0008] In a fifth aspect, there is provided a network device. The network device comprises: a processor configured to cause the network device to: transmit, to a terminal device, an indication of a first redundancy version (RV) of a transmission with SIB; determine a second RV of a repetition of the transmission; and transmit the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV.
[0009] In a sixth aspect, there is provided a network device. The network device comprises: a processor configured to cause the network device to: transmit, to a terminal device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; and transmit, to the terminal device, the WUS for the PWS indication or notification.
[0010] In a seventh aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a physical downlink control channel (PDCCH) transmission, or a physical downlink shared channel (PDSCH) transmission; and receiving, from the network device, at least one repetition of the at least one transmission with SIB based on the indication.
[0011] In an eighth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, an indication of a first redundancy version (RV) of a transmission with SIB; determining a second RV of a repetition of the transmission; and receiving the transmission and the repetition of the transmission from the network device based on the first RV and the second RV.
[0012] In a ninth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; and detecting the WUS for the PWS indication or notification based on the configuration.
[0013] In a tenth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a physical downlink control channel (PDCCH) transmission, or a physical downlink shared channel (PDSCH) transmission; and transmitting, to the terminal device, at least one repetition of the at least one transmission with SIB.
[0014] In an eleventh aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, an indication of a first redundancy version (RV) of a transmission with SIB; determining a second RV of a repetition of the transmission; and transmitting the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV.
[0015] In a twelfth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; and transmitting, to the terminal device, the WUS for the PWS indication or notification.
[0016] In a thirteenth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the seventh, eighth, ninth, tenth, eleventh, or twelfth aspect.
[0017] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0019] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0020] FIG. 2 illustrates a signaling flow of enhancement for transmission in non-terrestrial network in accordance with some embodiments of the present disclosure;
[0021] FIG. 3 illustrates a signaling flow of enhancement for transmission in non-terrestrial network in accordance with some embodiments of the present disclosure;
[0022] FIG. 4 illustrates a signaling flow of enhancement for transmission in non-terrestrial network in accordance with some embodiments of the present disclosure;
[0023] FIG. 5 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0024] FIG. 6 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0025] FIG. 7 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0026] FIG. 8 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure;
[0027] FIG. 9 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure;
[0028] FIG. 10 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure; and
[0029] FIG. 11 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0030] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0031] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0032] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0033] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further have ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0034] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0035] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0036] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0037] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0038] As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0039] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0040] As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0041] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0042] FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices, including a terminal device 110 and a network device 120, can communicate with each other.
[0043] In the example of FIG. 1, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE. For example, the terminal device 110 may be located in the cell managed by the network device 120. In the communication, the network device 120 may communicate data and control information with the terminal device 110.
[0044] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be other device than a terminal device.
[0045] In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0046] In some example embodiments, if the terminal device 110 is a terminal device and the network device 120 is a network device, a link from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL) . In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
[0047] The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0048] In some embodiments, the network device 120 may transmit system information such as SIB to the terminal device 110. The SIB may be involved in different communication systems, including but not limited to non-terrestrial network (NTN) , or any other suitable communication system.
[0049] In some example embodiments, the communication environment 100 is an NTN network including one or more satellites. In some example embodiments, an access network device (such as, a gNB) may be deployed at a satellite, also referred to as a regenerative architecture. Alternatively, in some example embodiments, an access network device may be deployed separately from the satellite, such as, deployed on the ground, also referred to as transparent architecture. In the present disclosure, according to the specific application scenario or requirements, either or both of the satellite and the access network device may be considered as the second apparatus 120. A terminal device in the NTN network may be considered as the first apparatus 110. Embodiments of the present discourse is not limited in this regard.
[0050] Enhancements of NTN may include the objective on link level enhancements for FR1-NTN. Specifically, link level enhancements may be specified for the channels including PDSCH with system information block 1 (SIB1) via 2 PDSCH repetitions within 20 millisecond (MS) duration. For link level enhancement of PDSCH with SIB1, the number of repetitions may be fixed to 2 repetitions. Moreover, procedure and signaling (enabling repetitions, associated time resource determination, etc. ) may be studied. Additionally, there may be a need for studying coverage enhancement for set 1-3 with a target carrier-to-noise ratio (CNR) of -8 decibel (dB) for NR NTN DL coverage enhancements at link level.
[0051] For physical broadcast channel (PBCH) , for operation without shared spectrum channel access, the 4 least significant bits of kSSB may be given by the higher-layer parameter ssb-SubcarrierOffset. Additionally, for FR1, the most significant bit of kSSB may be given by in the PBCH payload. kSSB is the subcarrier offset from subcarrier 0 in common resource block to the lowest-numbered subcarrier of the SS (synchronization signal) / PBCH block, or the SS / PBCH block after puncturing if applicable. is obtained from the higher-layer parameter offsetToPointA.
[0052] For a UE may determine the 2 least significant bit (LSB) bits of a candidate SS / PBCH block index per half frame from a one-to-one mapping with an index of the DM-RS sequence transmitted in the PBCH. For a UE may determine the 3 LSB bits of a candidate SS / PBCH block index per half frame from a one-to-one mapping with an index of the demodulation reference signal (DM-RS) sequence transmitted in the PBCH.
[0053] Additionally, for NB-IoT NTN, for public warning system (PWS) scheduling, resource and energy efficient manner use of separate wake-up signal (WUS) for PWS services may be considered.
[0054] There may be needs for studying the mechanism for enabling SIB1 PDSCH repetition, determining time domain resource, determining redundancy version (RV) for the second PDSCH transmission, or configure / use WUS for PWS.
[0055] To solve the above and other related / potential issues, embodiments of the present disclosure propose a solution. In the solution, an indication of enabling a repetition of at least one transmission with system information block is proposed. The at least one transmission includes a PDCCH transmission, and / or a PDSCH transmission. In this way, the transmission in non-terrestrial network may be enhanced with the repetition. Thus, the effectiveness of the transmission may be improved.
[0056] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0057] Reference is made to FIG. 2, which illustrates a signaling flow 200 of enhancement for SIB repetition in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 200 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120. For example, the terminal device 110 may be implemented as a UE, and the network device 120 may be implemented as a gNB. Alternatively, the terminal device 110 may be implemented as an IoT device, and the network device 120 may be implemented as a reader or gNB.
[0058] In the signaling flow 200, the network device 120 transmits (2010) , to the terminal device 110, an indication of enabling a repetition of at least one transmission with SIB. The at least one transmission includes a PDCCH transmission, and / or a PDSCH transmission. Correspondingly, the terminal device 110, receives (2020) the indication from the network device 120. As used herein, the term “enabling” , “activating” or the like are exchangeable. The terms “enabled” , “activated” , “applied” or “used” or the like are exchangeable.
[0059] By way of example, the SIB may be SIB1 or any other suitable SIB. For the purpose of illustration, some embodiments will be described with the SIB being SIB1, but it is to be understood that these embodiments may also be applied to other SIB.
[0060] The repetition of the at least one transmission with SIB may be enabled without receiving the indication of enabling the repetition. For example, the repetition may be enabled by default. That is, there may be no indication for enabling the repetition, which means that repetition may be enabled or used for SIB1 PDSCH / PDCCH by default. In such cases, an indication for disabling the repetition of PDSCH or PDCCH with SIB may be transmitted to the terminal device 110 if needed. Without receiving such enabling indication, the terminal device 110 may consider that the repetition is enabled by default.
[0061] Subsequently, the network device 120 transmits (2030) , to the terminal device 110, at least one repetition of the at least one transmission with SIB. Correspondingly, the terminal device 110 (2040) receives, from the network device 120, at least one repetition of the at least one transmission with SIB based on the indication.
[0062] Specifically, the indication may indicate enabling a repetition of the PDCCH transmission with SIB, or enabling a repetition of the PDSCH transmission with SIB. For example, if the indication of enabling the repetition is received, the repetition may be used for SIB1 PDCCH / PDSCH. Alternatively, the indication may indicate enabling both the repetition of PDCCH transmission with SIB and the repetition of PDSCH transmission with SIB.
[0063] Additionally, the indication may be included in, for example, but not limited to, at least one spare bit in a master information block (MIB) (referred to as a first MIB) , at least one bit of a first physical broadcast channel (PBCH) payload, at least one reserved bit in first downlink control information (DCI) , at least one bit in a field in the first DCI, or a radio network temporary identifier (RNTI) being used for the at least one transmission.
[0064] For example, the indication may be included in a spare bit in the first MIB. In this case, if 0 or other suitable value is indicated, it means that repetition is disabled. Alternatively, or in addition, if 1 is indicated, it means that repetition is enabled. Moreover, if indicated, the repetition may be used for SIB1 PDCCH and PDSCH. Alternatively, if indicated, the repetition may be used for SIB1 PDSCH. Alternatively, if indicated, the repetition may be used for SIB1 PDCCH. Table 1 shows an example of the indication included in the MIB. It is to be understood that these parameters and values in Table 1 are only for the purpose of illustration, without suggesting any limitation. Table 1
[0065] As shown in Table 1, the indication may be referred to as “sib1Repetition” . The field sib1Repetition may indicate whether SIB1 repetition for PDCCH / PDSCH is enabled.
[0066] Additionally, the indication may be included in bits of the first PBCH payload, for example, or The and / or in the first PBCH payload may be used for enabling repetition for SIB1 PDSCH / PDCCH. For example, one of and may be used to enable both the repetition of SIB1 PDCCH and the repetition of SIB1 PDSCH. For another example, one of and may be used to enable the repetition of SIB1 PDCCH, and another may be used to enable the repetition of SIB1 PDSCH.
[0067] In some embodiments, a reserved bit or a bit of other fields in the first DCI such as DCI 1_0 may be used for including the indication. For example, if 1 is indicated, it may mean that repetition is used for SIB1 PDSCH and / or SIB1 PDCCH. If 0 is indicated, it may mean that repetition is not used. Alternatively, in some other embodiment, 0 may mean that repetition is enabled or used for SIB1 PDSCH and / or SIB1 PDCCH, while 1 means that the repetition is not used. These example values for the indication are only for the purpose of illustration, without suggesting any limitation. In an embodiment, a single reserved bit may be used for enabling one of the repetition of SIB1 PDCCH and repetition of SIB1 PDSCH, or used for enabling both of these repetitions. In another embodiment, two reserved bits may be used for enabling the repetition of SIB1 PDCCH and SIB1 PDSCH respectively.
[0068] In some implementations, a new RNTI may be used, such as repetition system information (RSI) -RNTI or any other suitable RNTI. If the new RNTI such as RSI-RNTI is used, the repetition for SIB1 PDSCH / PDCCH may be used.
[0069] In some embodiments, the at least one transmission may be repeated across a plurality of consecutive slots. For example, for time domain resource determination for SIB1 PDSCH, repetition type A may be used, i.e. slot aggregation. The terminal device 110 may repeat the transmission block (TB) across two consecutive slots or more than two consecutive slots applying the same symbol allocation in each slot.
[0070] In addition, a time offset or time gap between two repetitions of the at least one transmission may be indicated by at least one of: second DCI from the network device 120, a time domain table, or a fixed time offset. For example, the second DCI or the time domain table may indicate a time offset or time gap between a first repetition and a second repetition of PDSCH with SIB1 and / or PDCCH with SIB1. The time offset or time gap may also be predefined or fixed. As used herein, the time offset between two repetitions may be referred to as a “first time offset” or “first time gap” . In some embodiments, the second DCI may be same with the first DCI comprising the indication described above. Alternatively, the first DCI and the second DCI may be different or separate pieces of DCI.
[0071] Alternatively, in some embodiments, a time offset or time gap between PDCCH and a first repetition of the at least one transmission may be indicated, for example by the second DCI from the network device 120, or indicated in a time domain table, or being predefined or configured as a fixed value. That is, timing relation between receiving the PDCCH and the first repetition of the SIB1 transmission may be indicated by the second DCI, or time domain table, or a fixed value. In such cases, the first repetition and the second repetition may be transmitted in consecutive slots. As used herein, the time offset between PDCCH and the first repetition may be referred to as a “second time offset” or “second time gap” . In some embodiments, the second DCI may be same with the first DCI comprising the indication described above. Alternatively, the first DCI and the second DCI may be different or separate pieces of DCI.
[0072] As mentioned, the first time offset and / or the second time offset may be indicated by the second DCI such as DCI 1_0. Specifically, the reserved bits or other field bits may be used for indicating the first time offset and / or the second time offset. In some implementations, a new time domain table may be used. For instance, a new column may be added in the table which may be used for indicating the first time offset and / or second time offset. Additionally, a fixed time offset may be defined for the first time offset and / or second time offset. For example, two or multiple slots may be defined. Moreover, K0 non-zero value may be introduced for the time domain resource table.
[0073] Table 2 shows an example of a new table with a new column added for indicating the time offset / gap. It is to be understood that these parameters and values in Table 2 are only for the purpose of illustration, without suggesting any limitation. Table 2
[0074] As shown in Table 2, the column for Time gap may be used for indicating the time gap.
[0075] In some implementations, demodulation reference signal (DMRS) bundling may be enabled for the PDSCH transmission. In this case, the network device 120 may transmit, to the terminal device 110, an indication of enabling DMRS bundling for the PDSCH transmission (also referred to as “DMRS enabling indication” for discussion) . Correspondingly, the terminal device 110 may receive the indication of enabling DMRS bundling from the network device 120.
[0076] Specifically, the indication of enabling DMRS bundling may be included in, for example, but not limited to, a spare bit in a second MIB, a bit of a second PBCH payload, or a reserved bit in third DCI. The second MIB may be same with the first MIB. Alternatively, the first MIB and the second MIB may be different. The second PDCH payload may be same with the first PBCH payload, or different from the first PDCH payload. The third DCI may be same with the first DCI and / or the second DCI, or alternatively be different from the first DCI and / or the second DCI. Scope of embodiments of the present disclosure is not limited here.
[0077] For example, the indication of enabling DMRS may be included in a spare bit in the MIB. In some embodiments, if SIB1 PDSCH repetition is enabled, the DMRS bundling may be also enabled. Alternatively, the indication may be included in an unused bit in the PBCH payload. In some implementations, the indication may be included in the reserved bit of DCI 1_0. For example, 1 may mean that the DMRS bundling is used, and 0 may mean that the DMRS bundling is not used. Alternatively or in addition, if there is no indication for DMRS bundling, the DMRS bundling may be used for SIB1 PDSCH.
[0078] Moreover, a window length for the DMRS bundling may be based on at least one of: a fixed window length, or an indicated length from the network device. Specifically, a default / fixed window length may be used. In this case, when DMRS enabling indication is received, a fixed window length may be used, such as 2 slots, 4 slots or 8 slots. Alternatively or in addition, the window length may be indicated by DCI 1_0. For instance, 2 values may be defined, 2 slots and 4 slots. Which of the two values is used may be indicated by DCI 1_0.
[0079] In this way, the repetition of the transmission between the terminal device 110 and the network device 120 may be enabled. Additionally, resources may be allocated for the repetition. Thus, the effectiveness and robustness of the transmission between the network device 120 and the terminal device 110 may be improved.
[0080] Reference is made to FIG. 3, which illustrates a signaling flow 300 enhancement for transmission in non-terrestrial network in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 300 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120. For example, the terminal device 110 may be implemented as a UE, and the network device 120 may be implemented as a gNB. Alternatively, the terminal device 110 may be implemented as an IoT device, and the network device 120 may be implemented as a reader or gNB.
[0081] In the signaling flow 300, the network device 120 transmits (3010) , to the terminal device 110, an indication of a first redundancy version (RV) of a transmission with system information block. Correspondingly, the terminal device 110 receives (3020) the indication from the network device 120. In some implementations, the transmission with SIB may include a physical downlink shared channel (PDSCH) with SIB.
[0082] In some embodiments, the indication of the first RV may be included in DCI (referred to as fourth DCI) . For example, the first RV may be indicated for the first transmission by DCI 1_0. The fourth DCI may be same with the first DCI, the second DCI and / or the third DCI described with respect to FIG. 2. Alternatively, the fourth DCI may be different from the first DCI, the second DCI and / or the third DCI.
[0083] Furthermore, the network device 120 may transmit, to the terminal device 110, an indication of enabling a repetition of the transmission. Correspondingly, the terminal device 110 may receive the indication of enabling the repetition of the transmission from the network device 120. In this case, the repetition of the transmission may be enabled based on the indication. Alternatively, a repetition of the transmission may be enabled without receiving an indication of enabling the repetition.
[0084] The terminal device 110 determines (3030) a second RV of a repetition of the transmission. The network device 120 determines (3040) a second RV of a repetition of the transmission. For example, the second RV may be determined based on a new table for RV. Table 3 shows an example of the table for the second RV. It is to be understood that these parameters and values in Table 3 are only for the purpose of illustration, without suggesting any limitation. Table 3
[0085] As shown in Table 3, the RV may be determined based on the indication, the first transmission and the second transmission. In some implementations, when receiving PDSCH scheduled by DCI format 1_0 in PDCCH with CRC scrambled by system information (SI) -RNTI / anew RNTI, if enabling repetition is indicated, the same symbol allocation may be applied across two consecutive slots. The redundancy version to be applied on the nth transmission occasion of the TB, where n = 0, 1, may be determined according to Table 3.
[0086] Subsequently, the network device 120 transmits (3050) the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV. Correspondingly, the terminal device 110 receives (3060) the transmission and the repetition of the transmission from the network device 120 based on the first RV and the second RV.
[0087] In this way, the RV for the repetition of the transmission between the network device 120 and the terminal device 110 may be determined. Thus, the transmission may be enhanced by the repetition. The effectiveness and robustness of the transmission may be improved.
[0088] For NB-IoT, when extended discontinuous reception (eDRX) is used, paging occasion (PO) may be only monitored within paging time window (PTW) . The PWS notification may have a requirement, i.e. primary notification may be informed within 4s. Besides, eDRX cycle of NB-IoT may be up to 1024H-system frame number (SFN) , i.e. 2.91h, which is very long. Hence, it is necessary to consider some ways to meet the requirement or reduce the delay.
[0089] Reference is made to FIG. 4, which illustrates a signaling flow 400 of enhancement for transmission in non-terrestrial network in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 400 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120. For example, the terminal device 110 may be implemented as a UE, and the network device 120 may be implemented as a gNB. Alternatively, the terminal device 110 may be implemented as an IoT device, and the network device 120 may be implemented as a reader or gNB.
[0090] In the signaling flow 400, the network device 120 transmits (4010) , to the terminal device 110, a configuration of a wake-up signal (WUS) . The WUS is for a public warning system (PWS) indication or notification. Correspondingly, the terminal device 110 receives the configuration from the network device 120.
[0091] In some embodiments, the configuration of the WUS for the PWS indication or notification may indicate a group WUS (GWUS) for the PWS indication or notification, and the configuration may include at least one of: a group selection of the GWUS for the PWS indication or notification, or a plurality of GWUS resources.
[0092] In this case, the eDRX may be configured for NB-IOT. The WUS for the PWS indication or notification may be not associated with a paging occasion. For instance, regarding whether the WUS for the PWS is associated with PO, in some embodiments, the WUS for the PWS may be not associated with the PO.
[0093] In some implementations, the configuration of the WUS may include, for example, but not limited to, a cycle for the WUS, a time offset for the WUS, a duration for the WUS, or geographical / area information for the WUS.
[0094] For example, the configuration of the WUS may include WUS related parameters configuration which may be configured by SIB1-NB or RRC message. The configuration may include a new WUS cycle, legacy default discontinuous reception (DRX) cycle, or legacy UE specific DRX cycle configured by upper layer, time offset and duration for WUS, or an area / geographical position indication.
[0095] Alternatively, the WUS for the PWS indication or notification may be associated with at least one paging occasion. In this case, the configuration of the WUS may include, for example, but not limited to, a maximum duration for the WUS, at least one associated number of the at least one paging occasion, at least one time offset from an end of the maximum duration for the WUS to the at least one associated paging occasion, or geographical information for the WUS.
[0096] For example, the configuration may include the parameter configuration for WUS of PWS, which may include maxDurationFactor, associated PO number, a time offset indicating a gap from the end of the configured maximum WUS duration to the associated PO or multiple Pos, or an area / geographical position indication.
[0097] Subsequently, the network device 120 transmits (4030) , to the terminal device 110, the WUS for the PWS indication or notification. The terminal device 110 detects (4040) the WUS for the PWS indication or notification based on the configuration.
[0098] If the WUS for the PWS indication or notification is not associated with a PO, in response to detecting the WUS for the PWS indication or notification, the terminal device 110 may obtain system information for NB-IoT.
[0099] Specifically, when the UE detects WUS for PWS, it may re-acquire SystemInformationBlockType1-NB for NB-IoT immediately, i.e. without waiting until the next system information modification period boundary. In this case, if the schedulingInfoList indicates that SystemInformationBlockType10 / 11 / 12-NB is present, the UE may acquire SystemInformationBlockType10-NB, SystemInformationBlockType11-NB or SystemInformationBlockType12-NB.
[0100] Alternatively or in addition, when the UE does not detect WUS for PWS, it may be not required to re-acquire SystemInformationBlockType1 for NB-IoT.
[0101] Alternatively, if the WUS for the PWS indication or notification is associated with at least one PO, in response to detecting the WUS for the PWS indication or notification, the terminal device 110 may monitor at least one following PO associated with the WUS.
[0102] For example, when the UE detects WUS for PWS, the UE may monitor the following PO. If the UE does not detect WUS for PWS, the UE may be not required to monitor the following PO (s) .
[0103] In this way, the WUS for the PWS indication or notification may be configured. Thus, the delay of eDRX of the NB-IoT network may be reduced. The efficiency of the NB-IoT network may be improved.
[0104] It would be appreciated that some example specifications and embodiments are provided above, and the detailed description may be varied.
[0105] Example embodiments for SIB repetition and example embodiments for WUS for PWS have been described with reference to the signaling flows 200, 300 and 400. In some embodiments, embodiments described with reference to one or more of the above signaling flows 200 to 400 may be combined. By using these signaling flows 200 and / or 400, the communication performance may be improved.
[0106] FIG. 5 illustrates a flowchart of a communication method 500 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 500 will be described from the perspective of the terminal device 110 in FIG. 1.
[0107] At block 510, the terminal device 110 receives, from a network device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission.
[0108] At block 520, the terminal device 110 receives, from the network device, at least one repetition of the at least one transmission with SIB based on the indication.
[0109] In some example embodiments, the indication indicates at least one of: enabling a repetition of the PDCCH transmission with SIB, or enabling a repetition of the PDSCH transmission with SIB.
[0110] In some example embodiments, the indication is comprised in at least one of: at least one spare bit in a first MIB, at least one bit of a first PBCH payload, at least one reserved bit in first DCI, at least one bit in a field in the first DCI, or a RNTI being used for the at least one transmission.
[0111] In some example embodiments, the at least one transmission is repeated across a plurality of consecutive slots.
[0112] In some example embodiments, a time offset between two repetitions of the at least one transmission is indicated by at least one of: second DCI from the network device, a time domain table, or a fixed time offset.
[0113] In some example embodiments, demodulation reference signal (DMRS) bundling is enabled for the PDSCH transmission.
[0114] In some example embodiments, the method 500 further comprises: receive, from the network device, an indication of enabling DMRS bundling for the PDSCH transmission.
[0115] In some example embodiments, the indication of enabling DMRS bundling is comprised in at least one of: a spare bit in a second MIB, a bit of a second PBCH payload, or a reserved bit in third DCI.
[0116] In some example embodiments, a window length for the DMRS bundling is based on at least one of: a fixed window length, or an indicated length from the network device.
[0117] In some example embodiments, the repetition of the at least one transmission with system information block is enabled without receiving the indication of enabling the repetition.
[0118] FIG. 6 illustrates a flowchart of a communication method 600 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the terminal device 110 in FIG. 1.
[0119] At block 610, the terminal device 110 receives, from a network device, an indication of a first redundancy version (RV) of a transmission with SIB.
[0120] At block 620, the terminal device 110 determines a second RV of a repetition of the transmission.
[0121] At block 630, the terminal device 110 receives the transmission and the repetition of the transmission from the network device based on the first RV and the second RV.
[0122] In some example embodiments, the second RV is determined based on a predetermined table.
[0123] In some example embodiments, the indication of the first RV is comprised in DCI.
[0124] In some example embodiments, the transmission with SIB comprises a PDSCH with SIB.
[0125] In some example embodiments, the method 600 further comprises: receiving, from the network device, an indication of enabling a repetition of the transmission.
[0126] In some example embodiments, a repetition of the transmission is enabled without receiving an indication of enabling the repetition.
[0127] FIG. 7 illustrates a flowchart of a communication method 700 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the terminal device 110 in FIG. 1.
[0128] At block 710, the terminal device 110 receives, from a network device, a configuration of a WUS, the WUS for a PWS indication or notification.
[0129] At block 720, the terminal device 110 detects the WUS for the PWS indication or notification based on the configuration.
[0130] In some example embodiments, the WUS for the PWS indication or notification is not associated with a paging occasion.
[0131] In some example embodiments, the configuration of the WUS comprises at least one of: a cycle for the WUS, a time offset for the WUS, a duration for the WUS, or geographical / area information for the WUS.
[0132] In some example embodiments, the method 700 further comprises: in response to detecting the WUS for the PWS indication or notification, obtain system information for narrow-band Internet of things (NB-IoT) .
[0133] In some example embodiments, the WUS for the PWS indication or notification is associated with at least one paging occasion.
[0134] In some example embodiments, the configuration of the WUS comprises at least one of: a maximum duration for the WUS, at least one associated number of the at least one paging occasion, at least one time offset from an end of the maximum duration for the WUS to the at least one associated paging occasion, or geographical information for the WUS.
[0135] In some example embodiments, the method 700 further comprises: in response to detecting the WUS for the PWS indication or notification, monitor at least one following PO associated with the WUS.
[0136] In some example embodiments, the configuration of the WUS for the PWS indication or notification indicates a GWUS for the PWS indication or notification, and the configuration comprises at least one of: a group selection of the GWUS for the PWS indication or notification, or a plurality of GWUS resources.
[0137] FIG. 8 illustrates a flowchart of a communication method 800 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the network device 120 in FIG. 1.
[0138] At block 810, the network device 120 transmits, to a terminal device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission.
[0139] At block 820, the network device 120 transmits, to the terminal device, at least one repetition of the at least one transmission with system information block.
[0140] In some example embodiments, the indication is comprised in at least one of: at least one spare bit in a first MIB, at least one bit of a first PBCH payload, at least one reserved bit in first DCI, at least one bit in a field in the first DCI, or a RNTI being used for the at least one transmission.
[0141] In some example embodiments, the method 800 further comprises: transmit, to the terminal device, second DCI indicating a time offset between two repetitions of the at least one transmission.
[0142] In some example embodiments, demodulation reference signal (DMRS) bundling is enabled for the PDSCH transmission.
[0143] In some example embodiments, the method 800 further comprises: transmit, to the terminal device, an indication of enabling DMRS bundling for the PDSCH transmission.
[0144] In some example embodiments, the indication of enabling DMRS bundling is comprised in at least one of: a spare bit in a second MIB, a bit of a second PBCH payload, or a reserved bit third DCI.
[0145] In some example embodiments, the method 800 further comprises: transmit, to the terminal device, a window length for the DMRS bundling.
[0146] FIG. 9 illustrates a flowchart of a communication method 900 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the network device 120 in FIG. 1.
[0147] At block 910, the network device 120 transmits, to a terminal device, an indication of a first RV of a transmission with SIB.
[0148] At block 920, the network device 120 determines a second RV of a repetition of the transmission.
[0149] At block 930, the network device 120 transmits the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV.
[0150] In some example embodiments, the second RV is determined based on a predetermined table.
[0151] In some example embodiments, the indication of the first RV is comprised in DCI.
[0152] In some example embodiments, the transmission with system information block comprises a PDSCH with system information block.
[0153] In some example embodiments, the method 900 further comprises: transmit, to the terminal device, an indication of enabling a repetition of the transmission.
[0154] FIG. 10 illustrates a flowchart of a communication method 1000 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1000 will be described from the perspective of the network device 120 in FIG. 1.
[0155] At block 1010, the network device 120 transmits, to a terminal device, a configuration of a WUS, the WUS for a PWS indication or notification.
[0156] At block 1020, the network device 120 transmits, to the terminal device, the WUS for the PWS indication or notification.
[0157] In some example embodiments, the WUS for the PWS indication or notification is not associated with a paging occasion.
[0158] In some example embodiments, the configuration of the WUS comprises at least one of: a cycle for the WUS, a time offset for the WUS, a duration for the WUS, or geographical or area information for the WUS.
[0159] In some example embodiments, the WUS for the PWS indication or notification is associated with at least one paging occasion.
[0160] In some example embodiments, the configuration of the WUS comprises at least one of: a maximum duration for the WUS, at least one associated number of the at least one paging occasion, at least one time offset from an end of the maximum duration for the WUS to the at least one associated paging occasion, or geographical or area information for the WUS.
[0161] In some example embodiments, the configuration of the WUS for the PWS indication or notification indicates a GWUS for the PWS indication or notification, and the configuration comprises at least one of: a group selection of the GWUS for the PWS indication, or a plurality of GWUS resources.
[0162] FIG. 11 is a simplified block diagram of a device 1100 that is suitable for implementing embodiments of the present disclosure. The device 1100 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1100 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0163] As shown, the device 1100 includes a processor 1110, a memory 1120 coupled to the processor 1110, a suitable transceiver 1140 coupled to the processor 1110, and a communication interface coupled to the transceiver 1140. The memory 1120 stores at least a part of a program 1130. The transceiver 1140 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1140 may include at least one of a transmitter 1142 and a receiver 1144. The transmitter 1142 and the receiver 1144 may be functional modules or physical entities. The transceiver 1140 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0164] The program 1130 is assumed to include program instructions that, when executed by the associated processor 1110, enable the device 1100 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 10. The embodiments herein may be implemented by computer software executable by the processor 1110 of the device 1100, or by hardware, or by a combination of software and hardware. The processor 1110 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1110 and memory 1120 may form processing means 1150 adapted to implement various embodiments of the present disclosure.
[0165] The memory 1120 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1120 is shown in the device 1100, there may be several physically distinct memory modules in the device 1100. The processor 1110 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1100 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0166] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission; and receive, from the network device, at least one repetition of the at least one transmission with SIB based on the indication. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0167] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, an indication of a first RV of a transmission with system information block; determine a second RV of a repetition of the transmission; and receive the transmission and the repetition of the transmission from the network device based on the first RV and the second RV. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0168] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, a configuration of a WUS, the WUS for a PWS indication or notification; and detect the WUS for the PWS indication or notification based on the configuration. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0169] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission; and transmit, to the terminal device, at least one repetition of the at least one transmission with SIB. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0170] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, an indication of a first RV of a transmission with system information block; determine a second RV of a repetition of the transmission; and transmit the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0171] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, a configuration of a WUS, the WUS for a PWS indication or notification; and transmit, to the terminal device, the WUS for the PWS indication or notification. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0172] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0173] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a network device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission; and means for receiving, from the network device, at least one repetition of the at least one transmission with SIB based on the indication. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 500. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 500. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0174] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for receiving, from a network device, an indication of a first RV of a transmission with system information block; means for determining a second RV of a repetition of the transmission; and means for receiving the transmission and the repetition of the transmission from the network device based on the first RV and the second RV. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 600. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0175] According to embodiments of the present disclosure, a third apparatus is provided. The third apparatus comprises means for receiving, from a network device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; and means for detecting the WUS for the PWS indication or notification based on the configuration. In some embodiments, the third apparatus may comprise means for performing the respective operations of the method 700. In some example embodiments, the third apparatus may further comprise means for performing other operations in some example embodiments of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0176] According to embodiments of the present disclosure, a fourth apparatus is provided. The fourth apparatus comprises means for transmitting, to a terminal device, an indication of enabling a repetition of at least one transmission with system information block, the at least one transmission comprising at least one of: a physical downlink control channel (PDCCH) transmission, or a physical downlink shared channel (PDSCH) transmission; and means for transmitting, to the terminal device, at least one repetition of the at least one transmission with system information block. In some embodiments, the fourth apparatus may comprise means for performing the respective operations of the method 800. In some example embodiments, the fourth apparatus may further comprise means for performing other operations in some example embodiments of the method 800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0177] According to embodiments of the present disclosure, a fifth apparatus is provided. The fifth apparatus comprises means for transmitting, to a terminal device, an indication of a first redundancy version (RV) of a transmission with system information block; means for determining a second RV of a repetition of the transmission; and means for transmitting the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV. In some embodiments, the fifth apparatus may comprise means for performing the respective operations of the method 900. In some example embodiments, the fifth apparatus may further comprise means for performing other operations in some example embodiments of the method 900. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0178] According to embodiments of the present disclosure, a sixth apparatus is provided. The sixth apparatus comprises means for transmitting, to a terminal device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; and means for transmitting, to the terminal device, the WUS for the PWS indication or notification. In some embodiments, the sixth apparatus may comprise means for performing the respective operations of the method 1000. In some example embodiments, the sixth apparatus may further comprise means for performing other operations in some example embodiments of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0179] In summary, embodiments of the present disclosure provide the following aspects.
[0180] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission; and receive, from the network device, at least one repetition of the at least one transmission with SIB based on the indication.
[0181] In some embodiments, the indication indicates at least one of: enabling a repetition of the PDCCH transmission with SIB, or enabling a repetition of the PDSCH transmission with SIB.
[0182] In some embodiments, the indication is comprised in at least one of: at least one spare bit in a first MIB, at least one bit of a first PBCH payload, at least one reserved bit in first DCI, at least one bit in a field in the first DCI, or a RNTI being used for the at least one transmission.
[0183] In some embodiments, the at least one transmission is repeated across a plurality of consecutive slots.
[0184] In some embodiments, a time offset between two repetitions of the at least one transmission is indicated by at least one of: second DCI from the network device, a time domain table, or a fixed time offset.
[0185] In some embodiments, a time offset between a PDCCH and a first repetition of the at least one transmission is indicated by at least one of: second DCI from the network device, a time domain table, or a fixed time offset.
[0186] In some embodiments, demodulation reference signal (DMRS) bundling is enabled for the PDSCH transmission.
[0187] In some embodiments, the processor is further configured to cause the terminal device to: receive, from the network device, an indication of enabling DMRS bundling for the PDSCH transmission.
[0188] In some embodiments, the indication of enabling DMRS bundling is comprised in at least one of: a spare bit in a second MIB, a bit of a second PBCH payload, or a reserved bit in third DCI.
[0189] In some embodiments, a window length for the DMRS bundling is based on at least one of: a fixed window length, or an indicated length from the network device.
[0190] In some embodiments, the repetition of the at least one transmission with system information block is enabled without receiving the indication of enabling the repetition.
[0191] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, an indication of a first RV of a transmission with SIB; determine a second RV of a repetition of the transmission; and receive the transmission and the repetition of the transmission from the network device based on the first RV and the second RV.
[0192] In some embodiments, the second RV is determined based on a predetermined table.
[0193] In some embodiments, the indication of the first RV is comprised in DCI.
[0194] In some embodiments, the transmission with SIB comprises a PDSCH with sSIB.
[0195] In some embodiments, the processor is further configured to cause the terminal device to: receiving, from the network device, an indication of enabling a repetition of the transmission.
[0196] In some embodiments, a repetition of the transmission is enabled without receiving an indication of enabling the repetition.
[0197] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, a configuration of a WUS, the WUS for a PWS indication or notification; and detect the WUS for the PWS indication or notification based on the configuration.
[0198] In some embodiments, the WUS for the PWS indication or notification is not associated with a paging occasion.
[0199] In some embodiments, the configuration of the WUS comprises at least one of: a cycle for the WUS, a time offset for the WUS, a duration for the WUS, or geographical / area information for the WUS.
[0200] In some embodiments, the processor is further configured to cause the terminal device to: in response to detecting the WUS for the PWS indication or notification, obtain system information for narrow-band Internet of things (NB-IoT) .
[0201] In some embodiments, the WUS for the PWS indication or notification is associated with at least one paging occasion.
[0202] In some embodiments, the configuration of the WUS comprises at least one of: a maximum duration for the WUS, at least one associated number of the at least one paging occasion, at least one time offset from an end of the maximum duration for the WUS to the at least one associated paging occasion, or geographical information for the WUS.
[0203] In some embodiments, the processor is further configured to cause the terminal device to: in response to detecting the WUS for the PWS indication or notification, monitor at least one following PO associated with the WUS.
[0204] In some embodiments, the configuration of the WUS for the PWS indication or notification indicates a GWUS for the PWS indication or notification, and the configuration comprises at least one of: a group selection of the GWUS for the PWS indication or notification, or a plurality of GWUS resources.
[0205] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, an indication of enabling a repetition of at least one transmission with SIB, the at least one transmission comprising at least one of: a PDCCH transmission, or a PDSCH transmission; and transmit, to the terminal device, at least one repetition of the at least one transmission with SIB.
[0206] In some embodiments, the indication is comprised in at least one of: at least one spare bit in a first MIB, at least one bit of a first PBCH payload, at least one reserved bit in first DCI, at least one bit in a field in the first DCI, or a RNTI being used for the at least one transmission.
[0207] In some embodiments, the processor is further configured to cause the network device to: transmit, to the terminal device, second DCI indicating a time offset between two repetitions of the at least one transmission.
[0208] In some embodiments, demodulation reference signal (DMRS) bundling is enabled for the PDSCH transmission.
[0209] In some embodiments, the processor is further configured to cause the network device to: transmit, to the terminal device, an indication of enabling DMRS bundling for the PDSCH transmission.
[0210] In some embodiments, the indication of enabling DMRS bundling is comprised in at least one of: a spare bit in a second MIB, a bit of a second BCH payload, or a reserved bit in third DCI.
[0211] In some embodiments, the processor is further configured to cause the network device to: transmit, to the terminal device, a window length for the DMRS bundling.
[0212] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, an indication of a first RV of a transmission with system information block; determine a second RV of a repetition of the transmission; and transmit the transmission and the repetition of the transmission to the terminal device based on the first RV and the second RV.
[0213] In some embodiments, the second RV is determined based on a predetermined table.
[0214] In some embodiments, the indication of the first RV is comprised in DCI.
[0215] In some embodiments, the transmission with system information block comprises a PDSCH with system information block.
[0216] In some embodiments, the processor is further configured to cause the network device to: transmit, to the terminal device, an indication of enabling a repetition of the transmission.
[0217] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, a configuration of a WUS, the WUS for a PWS indication or notification; and transmit, to the terminal device, the WUS for the PWS indication or notification.
[0218] In some embodiments, the WUS for the PWS indication or notification is not associated with a paging occasion.
[0219] In some embodiments, the configuration of the WUS comprises at least one of: a cycle for the WUS, a time offset for the WUS, a duration for the WUS, or geographical or area information for the WUS.
[0220] In some embodiments, the WUS for the PWS indication or notification is associated with at least one paging occasion.
[0221] In some embodiments, the configuration of the WUS comprises at least one of: a maximum duration for the WUS, at least one associated number of the at least one paging occasion, at least one time offset from an end of the maximum duration for the WUS to the at least one associated paging occasion, or geographical or area information for the WUS.
[0222] In some embodiments, the configuration of the WUS for the PWS indication or notification indicates a GWUS for the PWS indication or notification, and the configuration comprises at least one of: a group selection of the GWUS for the PWS indication, or a plurality of GWUS resources.
[0223] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0224] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0225] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0226] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0227] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0228] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0229] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0230] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0231] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0232] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0233] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0234] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0235] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0236] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0237] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0238] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0239] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0240] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0241] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0242] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 11. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0243] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0244] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0245] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0246] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, an indication of enabling a repetition of at least one transmission with system information block (SIB) , wherein the at least one transmission comprises at least one of: a physical downlink control channel (PDCCH) transmission, or a physical downlink shared channel (PDSCH) transmission; andreceive, from the network device, at least one repetition of the at least one transmission with SIB based on the indication.The terminal device of claim 1, wherein the indication indicates at least one of:enabling a repetition of the PDCCH transmission with SIB, orenabling a repetition of the PDSCH transmission with SIB.The terminal device of claim 1 or 2, wherein the indication is comprised in at least one of:at least one spare bit in a first master information block (MIB) ,at least one bit of first physical broadcast channel (PBCH) payload,at least one reserved bit in first downlink control information (DCI) ,at least one bit in a field in the first DCI, ora radio network temporary identifier (RNTI) being used for the at least one transmission.The terminal device of any of claims 1-3, wherein the at least one transmission is repeated across a plurality of consecutive slots.The terminal device of any of claims 1-4, wherein a time offset between two repetitions of the at least one transmission is indicated by at least one of: second DCI from the network device, a time domain table, or a fixed time offset.The terminal device of any of claims 1-4, wherein a time offset between a PDCCH and a first repetition of the at least one transmission is indicated by at least one of: second DCI from the network device, a time domain table, or a fixed time offset.The terminal device of any of claims 1-6, wherein demodulation reference signal (DMRS) bundling is enabled for the PDSCH transmission.The terminal device of claim 7, wherein the processor is further configured to cause the terminal device to:receive, from the network device, an indication of enabling DMRS bundling for the PDSCH transmission.The terminal device of claim 8, wherein the indication of enabling DMRS bundling is comprised in at least one of:a spare bit in a second MIB,a bit of a second PBCH payload, ora reserved bit in third DCI.The terminal device of any of claims 7-9, wherein a window length for the DMRS bundling is based on at least one of: a fixed window length, or an indicated length from the network device.The terminal device of any of claims 1-10, wherein the repetition of the at least one transmission with SIB is enabled without receiving the indication of enabling the repetition.A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, an indication of a first redundancy version (RV) of a transmission with system information block (SIB) ;determine a second RV of a repetition of the transmission; andreceive the transmission and the repetition of the transmission from the network device based on the first RV and the second RV.The terminal device of 12, wherein the second RV is determined based on a predetermined table.The terminal device of claim 12 or 13, wherein the indication of the first RV is comprised in downlink control information (DCI) .The terminal device of any of claims 12-14, wherein the transmission with system information block comprises a physical downlink shared channel (PDSCH) with SIB.The terminal device of any of claims 12-15, wherein the processor is further configured to cause the terminal device to:receiving, from the network device, an indication of enabling a repetition of the transmission.The terminal device of any of claims 12-15, wherein a repetition of the transmission is enabled without receiving an indication of enabling the repetition.A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, a configuration of a wake-up signal (WUS) , the WUS for a public warning system (PWS) indication or notification; anddetect the WUS for the PWS indication or notification based on the configuration.The terminal device of claim 18, wherein the WUS for the PWS indication or notification is not associated with a paging occasion.The terminal device of claim 19, wherein the configuration of the WUS comprises at least one of:a cycle for the WUS,a time offset for the WUS,a duration for the WUS, orgeographical or area information for the WUS.