Devices and methods for downlink coverage enhancement
DTX/DRX cycles with multiple states address downlink coverage issues in non-terrestrial networks by optimizing resource allocation and adapting to traffic demands, improving energy and bandwidth efficiency.
Patent Information
- Application Number
- PCT/CN2024/106610
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2026-01-22
AI Technical Summary
Non-terrestrial networks face challenges in enhancing downlink coverage due to limited power and bandwidth, complex cell search, and varying traffic demands, necessitating improved discontinuous transmission and reception (DTX/DRX) strategies.
Implementing DTX/DRX cycles with multiple states (active, semi-active, and non-active) and dynamic state transitions based on received information, allowing flexible resource allocation and efficient power sharing among satellite beams.
Enhances energy efficiency and bandwidth utilization in downlink transmissions by dynamically adapting to varying traffic conditions and user distributions, optimizing resource allocation in non-terrestrial networks.
Smart Images

Figure CN2024106610_22012026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR DOWNLINK COVERAGE ENHANCEMENTFIELD
[0001] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for discontinuous transmission and / or discontinuous reception (DTX / DRX) of downlink coverage enhancement.BACKGROUND
[0002] A non-terrestrial network (NTN) refers to a network or segment of networks using radio frequency (RF) resources on board a satellite or unmanned aircraft system (UAS) platform. The NTN could provide ubiquitous and resilient wireless service beyond the terrestrial network coverage. The 3rd Generation Partnership Project (3GPP) has started the standardization of NTN since the fifth generation (5G) communication system. NTN is expected to be fully integrated with TN in the sixth generation (6G) . In NTN, a relatively large number of terminal devices are served in a cell. The NTN needs to enhance / improve the downlink coverage.SUMMARY
[0003] In general, embodiments of the present disclosure provide solutions for DTX / DRX of downlink coverage enhancement.
[0004] In a first aspect, there is provided a first device. The first device comprises: a processor configured to cause the first device to: receive, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and perform the DTX / DRX in the coverage based on the received information.
[0005] In a second aspect, there is provided a first device. The first device comprises: a processor configured to cause the first device to: receive, from a second device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the DTX / DRX configuration.
[0006] In a third aspect, there is provided a second device. The second device comprises: a processor configured to cause the second device to: transmit, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and perform the DTX / DRX in the coverage based on the information.
[0007] In a fourth aspect, there is provided a second device. The second device comprises: a processor configured to cause the second device to: transmit, to a first device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the DTX / DRX configuration.
[0008] In a fifth aspect, there is provided a communication method performed by a first device. The method comprises: receiving, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and performing the DTX / DRX in the coverage based on the received information.
[0009] In a sixth aspect, there is provided a communication method performed by a first device. The method comprises: receiving, from a second device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and performing the DTX / DRX based on the DTX / DRX configuration.
[0010] In a seventh aspect, there is provided a communication method performed by a second device. The method comprises: transmitting, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and performing the DTX / DRX in the coverage based on the information.
[0011] In an eighth aspect, there is provided a communication method performed by a second device. The method comprises: transmitting, to a first device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and performing the DTX / DRX based on the DTX / DRX configuration.
[0012] In a ninth 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 fifth, sixth, seventh, or eighth aspect.
[0013] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0014] 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:
[0015] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0016] FIG. 2 illustrates a signaling flow of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure;
[0017] FIG. 3 illustrates a schematic diagram of an example of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure;
[0018] FIG. 4 illustrates a schematic diagram of an example of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure;
[0019] FIG. 5 illustrates a signaling flow of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure;
[0020] FIG. 6 illustrates a flowchart of a communication method implemented at a first device according to some example embodiments of the present disclosure;
[0021] FIG. 7 illustrates a flowchart of a communication method implemented at a first device according to some example embodiments of the present disclosure;
[0022] FIG. 8 illustrates a flowchart of a communication method implemented at a second device according to some example embodiments of the present disclosure;
[0023] FIG. 9 illustrates a flowchart of a communication method implemented at a second device according to some example embodiments of the present disclosure;
[0024] FIG. 10 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0025] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0026] 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.
[0027] 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.
[0028] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0029] 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.
[0030] 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.
[0031] The terminal or the network device may work on several frequency ranges, e.g., Frequency Range 1 (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.
[0032] 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.
[0033] As used herein, the singular forms ‘a’ , ‘an’ a nd ‘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.
[0034] 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.
[0035] 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.
[0036] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0037] FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented.
[0038] As shown in FIG. 1, the environment 100 involves a first device 110, for example, terminal device 110, a second device 120, for example, a radio access network (RAN) devices 120 which may be on the corresponding satellites or UAS platforms, an NTN gateway 140, and a core network (CN) 150.
[0039] The NTN gateway 140 may be an earth station or gateway that is located at the surface of Earth, and may provide sufficient radio frequency (RF) power and RF sensitivity for accessing to the satellites (high altitude platform stations, HAPS) . The NTN Gateway 140 may be considered as a transport network layer (TNL) node. A feeder link or radio link is a wireless link between an NTN gateway and a satellite (or UAS platform) . The RAN device 120 may have feeder links with the NTN gateway 140, and such links are mandatory if there is no Inter-Satellite Link (ISL) between different RAN devices 120.
[0040] A service link or radio link is a wireless link between a first device 110 and a RAN device 120. A beam footprint 112 is the area of the Earth visible to satellites. From the field of view of the satellite (or UAS platform) 160 for the RAN device 120, more than one footprint 112 may be covered. Generally, to determine whether a first device can communicate with a satellite, it depends on whether the signal coverage area of the satellite will cover the terminal device and at what time.
[0041] 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.
[0042] In the following, for the purpose of illustration, some example embodiments are described with the first device 110 operating as a UE and the second device 120 operating as a base station. However, in some example embodiments, operations described in connection with a first device may be implemented at a second device or other device, and operations described in connection with a second device may be implemented at a first device or other device.
[0043] In some example embodiments, if the first device 110 is a terminal device and the second device 120 is a network device, a link from the second device 120 to the first device 110 is referred to as a downlink (DL) , while a link from the first device 110 to the second device 120 is referred to as an uplink (UL) . In DL, the second device 120 is a transmitting (TX) device (or a transmitter) and the first device 110 is a receiving (RX) device (or a receiver) . In UL, the first device 110 is a TX device (or a transmitter) and the second device 120 is a RX device (or a receiver) .
[0044] 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.
[0045] Based on the agreements in 3GPP RAN1, the total number of simultaneously active beams is 106 / 1058 (i.e. 10.02%for FR1) or 12 / 800 (i.e. 1.5%for FR2) or 16 / 1058 (i.e. 1.5%for FR1) for different cases. At any given time, some satellite beams will be “on” while others will be “off” , with the previously “on” beams subsequently switching to “off” .
[0046] In an example, if the power is shared among satellite beams or different satellite beam patterns / sizes (i.e., wide or narrow) across the satellite coverage in the NTN, due to limited power and limited feeder link bandwidth, the satellite beams may not all be activated at the same time or may be less than the nominal effective isotropic radiated power (EIRP) density of each satellite beam. Therefore, it is essential to define additional reference satellite payload parameters, the corresponding power sharing assumptions, and the necessary link-level and system-level evaluation methodologies along with relevant KPIs for evaluations of the coverage. This will facilitate the identification of physical channels and signals, as well as system-level aspects requiring enhancements and the corresponding needed improvements.
[0047] Furthermore, it is necessary to specify link-level enhancements for FR1-NTN (e.g., for PDCCH, PDSCH) and / or system-level enhancements for FR1-NTN and FR2-NTN to enable dynamic and flexible power sharing between satellite beams or different satellite beam patterns / sizes (i.e., wide or narrow) across the satellite footprint.
[0048] There are also some other issues to be solved, such as UE’s cell search complexity, the impact on initial cell selection, latency, and success rate when evaluating the extension of SSB periodicity.
[0049] Furthermore, there are problems in distinguishing the different states for the DTX / DRX of the DL coverage in NTN. Moreover, if traffic requirements increase in the coverage, the extension of active duration needs to be indicated. Additionally, when the traffic volume increases or decreases, or all UEs in the coverage enter a CONNECTED, IDLE, or INACTIVE state, there is a need to find a way for updating the DTX pattern.
[0050] To solve the above and other related / potential issues, embodiments of the present disclosure propose an example DL transmission with DTX / DRX and related solution (s) . In a solution, a first device receives, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in DTX / DRX. The first state corresponds to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device. The second state corresponds to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed. The third state corresponds to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration. In the solution, the first device further performs the DTX / DRX in the coverage based on the received information. In this way, by using new state (s) in DTX / DRX, the UE can perform operation based on the states. Thus, the first device can dynamically and flexibly change the states for the coverage in DTX / DRX, thereby enhancing the energy efficiency and bandwidth utilization of downlink (DL) transmission.
[0051] Reference is made to FIG. 2, which illustrates a signaling flow 200 of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure. As shown in FIG. 2, the signaling flow 200 involves a first device 110 and a second device 120 as shown FIG. 1.
[0052] In some embodiments, the first device 110 and the second device 120 may be devices in a Non-Terrestrial Network (NTN) . Moreover, the first device 110 may be a terminal device, and the second device 120 may be a network device. For example, the first device 110 may be a UE, and the second device 120 may be a RAN device, which is sometimes referred to as NW.
[0053] As shown in FIG. 2, the second device 120 transmits (205) , to the first device 110, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) and performs (230) the DTX / DRX in the coverage based on the information. The first device 110 receives (210) , from the second device 120, the information and performs (220) the DTX / DRX in the coverage based on the received information.
[0054] The information indicates at least one of a first state, a second state or a third state for a coverage in DTX / DRX. The first state corresponds to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device. The second state corresponds to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed. Moreover, the third state corresponds to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration.
[0055] In some embodiments, the first state may be an active state. The second state may be a semi-active state. The third state may be non-active state. For the DTX / DRX in NTN, there may be three different state, such as the active state, the semi-active state and the non-active state. It is to be understood that the names currently in use are non-limiting and discussed just for illustration.
[0056] In some embodiments, the coverage may include a cell, a beam or other suitable coverage. For example, a coverage DTX / DRX may be a cell DTX / DRX or a beam DTX / DRX.
[0057] In some embodiments, if the cell / beam DTX / DRX is configured, the cell / beam DTX / DRX status may be set to activated or deactivated or the cell / beam DTX / DRX may be activated by downlink control information (DCI) . Furthermore, if the cell / beam DTX / DRX is activated, there may be three states including the active state, the semi-active state, and the non-active state. It should be noted that the names currently in use are non-limiting and may be various other possible designations. For the active state, the UE may monitor any channels and signals. For the semi-active state, only some common messages or signals may be transmitted, such as SSB, paging, system information block (SIB) , messages within the random access procedure. For the non-active state, the cell or beam will not transmit any signals.
[0058] In some embodiments, the information transmitted from the second device 120 to the first device 110 may comprise at least one of: the DTX / DRX cycle, a first set of parameters for the first state or a second set of parameters for the second state.
[0059] The DTX / DRX cycle may determine the duration and periodicity of the DTX / DRX. In some embodiments, the DTX / DRX cycle may be celldtxdrx-Cycle or beamdtxdrx-Cycle.
[0060] The first set of parameters for the first state may comprise at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration. In some embodiments, the first on-duration timer may be celldtxdrx-onDurationTimer or beamdtxdrx-onDurationTimer. The start offset for the first duration may be celldtxdrx-StartOffset or beamdtxdrx-StartOffset. Moreover, the slot offset for the first duration may be celldtxdrx-SlotOffset or beamdtxdrx-SlotOffset.
[0061] The second set of parameters for the second state may comprise at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration. In some embodiments, the second on-duration timer may be celldtxdrx-SemiOnDurationTimer or beamdtxdrx-SemiOnDurationTimer. The start offset for the second duration may be celldtxdrx-SemiActivateStartOffset or beamdtxdrx-SemiActivateStartOffset. Furthermore, the slot offset for the second duration may be celldtxdrx-SemiActivateSlotOffset or beamdtxdrx-SemiActivateSlotOffset.
[0062] In some embodiments, the second on-duration timer may be determined based on the DTX / DRX cycle and the start offset for the second duration. Optionally, the second on-duration timer may start after the slot offset for the second duration from the beginning of a subframe. For example, if cell DTX is configured and activated, the cell DTX semi-active duration includes the time while: celldtx-SemiOnDurationTimer is running for the associated serving cell. If celldtxdrx-onDurationTimer is configured and [ (SFN × 10) +subframe number] modulo (celldtxdrx-Cycle) = (celldtxdrx-StartOffset) , celldtxdrx-onDurationTimer for this serving cell may start after celldtxdrx-SlotOffset from the beginning of the subframe. Moreover, the celldtx-SemiOnDurationTimer for the serving cell start after the celldtxdrx-SemiActiveSlotOffset from the beginning of the subframe, if [(SFN × 10) + subframe number] modulo (celldtxdrx-Cycle) = (celldtxdrx-SemiActiveStartOffset) . The SFN is the number of the subframe. Table 1 shows an example for the second on-duration timer.
[0063] Table 1
[0064] In some embodiments, the first device 110 may be in the second state and the DTX may be activated. In this case, the first device may receive at least one of a synchronization signal block or a channel state information-reference signal; monitor a downlink control channel associated with a Radio Network Temporary Identifier (RNTI) ; or receive a first system information block and / or system information (SI) .
[0065] In some embodiments, the first device 110 may be in a Radio Resource Control (RRC) connected mode. In this case, when monitoring the downlink control channel, e.g., Physical Downlink Control Channel (PDCCH) , the first device 110 may monitor a system information (SI) change indication in a paging occasion at least once per modification duration. Optionally, the first device 110 may be in a non RRC connected mode. Furthermore, when monitoring the downlink control channel, the first device 110 may monitor Physical Downlink Control Channel (PDCCH) addressed to Paging Radio Network Temporary Identifier (P-RNTI) , System Information Radio Network Temporary Identifier (SI-RNTI) , Random Access Radio Network Temporary Identifier (RA-RNTI) , Temporary Cell-Radio Network Temporary Identifier (TC-RNTI) , and / or Message B Radio Network Temporary Identifier (MSGB-RNTI) .
[0066] In some embodiments, the serving cell is in the cell DTX semi-active duration. If the UE is in the semi-active state and a RRC connected mode with the cell DTX activated, the UE may receive, detect, monitor or acquire SSB and Channel State Information Reference Signal (CSI-RS) . Furthermore, The UE may monitor for SI change indication in any paging occasion at least once per modification period. The UE may acquire SIB1 or other SIs. Moreover, if the UE is in the semi-active state and a non RRC connected mode with the cell DTX activated, the UE may receive, detect, monitor or acquire SSB. The PDCCH may be addressed to P-RNTI and SI-RNTI. Alternatively, the UE may acquire SIB1 or other SIs. Table 2 shows an example for the acts performed by the UE.
[0067] Table 2
[0068] In some embodiments, the first device 110 may be in the third state and the DTX may be activated. Moreover, the first device 110 may not perform a monitoring operation. Table 3 shows an example for UE in a non-active state.
[0069] Table 3
[0070] In some embodiments, the first device 110 is in the second state and DRX is activated. Moreover, the first device 110 may not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR. Alternatively, the first device 110 may not increment a counter for a SR. The first device 110 may not start a timer for a SR. The first device 110 may not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity. The first device 110 may not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission. The first device 110 may not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or initiate a Random Access procedure if an emergency service is initiated by upper layers and a serving cell is a Special Cell (SpCell) .
[0071] In some embodiments, the first device 110 is in the third state and DRX is activated. Moreover, the first device 110 may not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR. Alternatively, the first device 110 may not increment a counter for a SR. The first device 110 may not start a timer for a SR. The first device 110 may not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity. The first device 110 may not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission. The first device 110 may not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH. The first device 110 may not instruct the physical layer to transmit preamble and physical uplink shared channel (PUSCH) within 4-step random access channel (RACH) . The first device 110 may instruct the physical layer to transmit MSGA preamble and MSGA PUSCH within 4-step RACH.
[0072] For example, if cell DRX is configured and activated, the cell DRX semi-active duration includes the time while: celldtx-SemiOnDurationTimer is running for the associated serving cell. If celldtxdrx-onDurationTimer is configured and [ (SFN × 10) +subframe number] modulo (celldtxdrx-Cycle) = (celldtxdrx-StartOffset) , celldtxdrx-onDurationTimer for this serving cell may start after celldtxdrx-SlotOffset from the beginning of the subframe. > if celldtx-SemiOnDurationTimer is configured and [ (SFN ×10) + subframe number] modulo (celldtxdrx-Cycle) = (celldtxdrx-SemiActiveStartOffset) , celldtx-SemiOnDurationTimer for this serving cell may start after celldtxdrx-SemiActiveSlotOffset from the beginning of the subframe.
[0073] In some embodiments, the cell DRX is activated. Furthermore, if the serving cell is not in the cell DRX active duration and the serving cell is in the cell DRX semi-active duration, the UE may not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR. Alternatively, the UE may not increment the SR_COUNTER for a SR. The UE may not start the sr-ProhibitTimer for a SR. The UE may not deliver any configured uplink grant and the associated HARQ information to the HARQ entity. The UE may not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission. The UE may not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or initiate a Random Access procedure if an emergency service is initiated by upper layers and a serving cell is a Special Cell (SpCell) .
[0074] In some embodiments, the cell DRX is activated. Furthermore, if the serving cell is not in the cell DRX active duration and the serving cell is not in the cell DRX semi-active duration, the UE may not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR. Alternatively, the UE may not increment the SR_COUNTER for a SR. The UE may not start the sr-ProhibitTimer for a SR. The UE may not deliver any configured uplink grant and the associated HARQ information to the HARQ entity. The UE may not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission. The UE may not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH. The UE may not instruct the physical layer to transmit preamble and PUSCH within 4-step RACH. The UE may not instruct the physical layer to transmit MSGA preamble and MSGA PUSCH within 4-step RACH. Table 4 shows an example for the acts performed by the first device in different states.
[0075] Table 4
[0076] In this way, the first device 110 performs the DTX / DRX in three states according to the information. Thus, the downlink transmission with DTX / DRX is more flexible and efficient.
[0077] In some embodiments, the number of UEs in different coverages may be different, resulting in different resources requirements among different coverages in the NTN. It is necessary to allocate the power and bandwidth resources efficiently among different coverages in the NTN. For example, if the active duration or semi-active duration of a coverage with more UEs is less than or equal to that of a coverage with less UEs, there may be a waste of power and bandwidth resources.
[0078] To address the above and other related / potential issues, embodiments of the present disclosure propose an example DL transmission with DTX / DRX and related solution (s) . In a solution, the second device 120 may transmit, to the first device 110, an extension indication for extending at least one of the first duration or the second duration. Moreover, the second device 120 perform the DTX / DRX based on the information and the extension indication.
[0079] Correspondingly, the first device 110 may receive an extension indication for extending at least one of the first duration or the second duration. Likewise, the first device 110 may perform the DTX / DRX based on the received information and the extension indication. For example, in response to receiving an extension indication, the UE perform the DTX / DRX based on the information and the received extension indication.
[0080] It should be noted that the above extension pattern is not limited to DTX / DRX with three states, but can be applied to DTX / DRX with two or more than states.
[0081] In some embodiments, the extension indication may include an extension duration and / or an extension offset. The extension duration may be used for extending a time length of the first duration and / or the second duration. The extension offset may indicate a start of the extension duration.
[0082] Now more detailed embodiments will be further discussed blow. FIG. 3 illustrates a schematic diagram of an example of transmission 300 with DTX / DRX in accordance with some embodiments of the present disclosure. As shown in FIG. 3, the transmission 300 involves the first / second duration 304, the extension indication 302, the third duration 306, the extension duration 308, and a DTX / DRX cycle 310.
[0083] As illustrated in FIG. 3, the extension indication 302 includes the extension duration 308 for extending a time length of the at least one of the first duration or the second duration 304. Moreover, in the embodiment of FIG. 3 the extension offset is 0. In other words, the first / second duration is extended right after the ending of the first / second duration.
[0084] Now more detailed embodiments will be further discussed blow. FIG. 4 illustrates a schematic diagram of an example of transmission 400 with DTX / DRX in accordance with some embodiments of the present disclosure. As shown in FIG. 4, the downlink transmission 400 involves the first / second duration 404, the extension indication 402, the third duration 406, the extension duration 408, the DTX / DRX cycle 410, and the extension offset 412.
[0085] As illustrated in FIG. 4, the extension indication 402 include the extension duration 408 for extending a time length of the at least one of the first duration or the second duration 404 and the extension offset 412. The first or second duration of the first device 110 may start after the extension offset 412 after the first or second duration.
[0086] In this way, the first device can be allocated with more power and bandwidth resources according to the extension indication in a flexible and efficient way. Thus, the efficiency of the transmission with DTX / DRX is improved.
[0087] In constant to providing the explicit values of the extension duration and the extension offset, the extension duration and the extension offset may be provided in a different way. Specifically, the second device 120 may transmit, to the first device 110, a list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations. Upon receiving, from the second device 120, the list of the candidate extension durations and the candidate extension offsets, the first device 110 may store the list for further selection of the target extension duration and offset. The extension indication may indicate an index in the list, which indicates the target extension duration and the corresponding target extension offset in the list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations.
[0088] For example, there may be a predetermined list of candidates extension durations and candidates extension offsets corresponding to the candidate extension durations stored for the UE. If the active or semi-active state of the UE is to be extended, the UE may receive an extension indication indicating which pair of candidates extension durations and candidates extension offsets is used for the UE. In an example, the list of candidates extension durations and candidates extension offsets may include candidates with different time assignment strategies. Further, the strategy used for extending the active or semi-active duration of a UE may be determined based on the requirements of the UE and the resource redundancy of the coverage.
[0089] In addition to the extension indication, the second device 120 may transmit other indication (s) to the first device 110. For example, in some embodiments, the first device 110 may receive, from the second device 120, a pause indication indicating termination of at least one of the first duration or the second duration. In some other embodiments, the first device 110 may receive, from the second device 120, an update indication indicating: an updated duration and an update offset, or an updated index indicating one of a list of candidate durations and candidate offsets.
[0090] For example, the UE in an active or semi-active state may receive a pause indication and change to the non-active state. The UE may receive a new indication for updating the extension indication or a new list of candidate durations and candidate offsets for updating the list of candidate durations and candidate offsets.
[0091] In some embodiments, a new RNTI may be introduced. For example, a broadcast RNTI may be introduced. In an example, a current reserved RNTI may be used, such as FFFA. Alternatively, a group common RNTI may be configured.
[0092] In this way, some cell / beams with more UEs can achieve more active time.
[0093] In some scenarios, for a beam, there may be more UEs gathering in certain area than other location. An excessive number of UEs in the same area may lead to bandwidth resource insufficiency or a reduction in downlink transmission rates.
[0094] To address the above and other related / potential issues, in some embodiments, the second device 120 may transmit a DTX / DRX configuration associated with a beam to the first device 110. Upon receiving the DTX / DRX configuration, the first device 110 may have the knowledge of the following: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam. Moreover, the first device 110 may perform the DTX / DRX based on the received information and the DTX / DRX configuration.
[0095] In the DTX / DRX configuration, the index of the beam may be beam index, for example, an SSB index, which is consistent with the actually transmitted SSB. In some implementations, if the beam index is not used, the configuration index may be used. The geographical area information may include a reference location, a distance radius, and / or the like. The DTX / DRX pattern may include at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0096] It should be noted that the above DTX / DRX configuration is not limited to DTX / DRX with three states, but can be applied to DTX / DRX with two or more than two states.
[0097] In some embodiments, the first device 110 may determine the area where the first device is located based on the index of the area or the geographical area information. Moreover, the first device 110 may select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.
[0098] For example, the first device 110, e.g., UE may determine its location by the geographic area information or an index of the area. According to the location information of the UE, a DTX / DRX pattern may be determined. In an example, the correspondence between the DTX / DRX pattern and the location of UEs may be predetermined or updated in real time.
[0099] For example, the UE with geographical area information may obtain the distance between the UE and the reference location and compare the distance with the distance radius. If the distance between the UE and the reference location is greater than the distance radius, the UE may require new geographical area information for other area.
[0100] If the UE is in a certain indicated area, the UE may select the corresponding DTX / DRX configuration associated with this area. Once the UE leaves the current area, the DTX / DRX pattern configuration needs to be changed. The UE may use the corresponding DTX / DRX configuration associated with the new entered area.
[0101] Alternatively, the target DTX / DRX pattern may be determined based on receiving powers or signal quality. In some embodiments, the first device 110 may determine a synchronization signal block (SSB) based on receiving powers of synchronization signals. Moreover, the first device 110 may select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB.
[0102] For example, the UE may select the SSB with the highest reference signal received power (RSRP) . Based on the selected SSB, the UE use the corresponding DTX / DRX configuration associated with the SSB. If the UE receives the latest unfiltered L1-RSRP measurement result, it will determine whether the current DTX / DRX configuration is changed based on the received measurement result.
[0103] In some embodiments, the second device 120 may transmit, to the first device 110, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device. Correspondingly, the first device 110 may receive, from the second device 120, the indication and thus may have the knowledge of the target pattern.
[0104] The indication may be carried by DCI including a DTX / DRX configuration. The DCI may be a new DCI or current DCI. The RNTI for DCI may be a group common RNTI. Optionally, a cell level or broadcast RNTI may be used. Further, A group common RNTI may be configured by RRC message or SIB. A cell level or broadcast RNTI may use the current reserved RNTI, such as FFFA. Table 5 shows an example of DTX / DRX configuration.
[0105] Table 5
[0106] In this way, the DTX / DRX pattern of the first device can be controlled based on the location of the first device in an efficient way. Thus, the resources allocated to the first devices in each area can be managed based on the number of the first devices in that area in a flexible and efficient way.
[0107] In an example, for a beam, there may be more UEs gathering in certain area than other location. An excessive number of UEs in the same area may lead to bandwidth resource insufficiency or a reduction in downlink transmission rates.
[0108] To address the above and other related / potential issues, embodiments of the present disclosure propose an example DL transmission with discontinuous transmission and / or discontinuous reception (DTX / DRX) and related solution (s) . In a solution, the first device 110 receive, from the second device 120, a DTX / DRX configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam. Moreover, the first device 110 perform the DTX / DRX based on the received information and the DTX / DRX configuration.
[0109] Reference is made to FIG. 5, which illustrates a signaling flow 500 of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure. As shown in FIG. 5, the signaling flow 500 involves a first device 110, e.g., UE, and a second device 120, e.g., a RAN device or NW, as discussed with respect to FIG. 1. It is to be understood that although one terminal device 110 is illustrated in FIG. 5, the signal flow 500 may involve a plurality of terminal devices.
[0110] As shown in FIG. 5, the second device 120 transmits (505) , to the first device 110, a DTX / DRX configuration associated with a beam and performs (530) the DTX / DRX based on the DTX / DRX configuration. The first device 110 receives (510) , from the second device 120, DTX / DRX configuration and performs (520) the DTX / DRX based on the DTX / DRX configuration.
[0111] It should be noted that the above DTX / DRX configuration is not limited to DTX / DRX with three states in the embodiments in the present disclosure, but can be applied to DTX / DRX with two or more than two states.
[0112] In some embodiments, the first device 110 and the second device 120 may be in a Non-Terrestrial Network (NTN) . Moreover, the first device 110 may be a terminal device, and the second device 120 may be a network device. For example, the first device 110 may be a UE, and the second device 120 may be a gNB.
[0113] In some embodiments, a DTX / DRX pattern may include at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0114] In some embodiments, the first device 110 may determine area where the first device is located based on the index of the area or the geographical area information. Moreover, the first device 110 may select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.
[0115] For example, the UE may determine its location by the geographic area information or an index of the area. According to the location information of the UE, a DTX / DRX pattern may be determined. In an example, the correspondence between the DTX / DRX pattern and the location of UEs may be predetermined or updated in real time.
[0116] In some embodiments, the geographical area information may include at least one of a reference location or a distance radius.
[0117] For example, the UE with geographical area information may obtain the distance between the UE and the reference location and compare the distance with the distance radius. If the distance between the UE and the reference location is greater than the distance radius, the UE may require new geographical area information for other area.
[0118] If the UE is in a certain indicated area, the UE selects the corresponding DTX / DRX configuration associated with this area. Once the UE leaves the current area, the DTX / DRX pattern configuration needs to be changed. The UE may use the corresponding DTX / DRX configuration associated with the new entered area.
[0119] In some embodiments, the first device 110 may determine a synchronization signal block (SSB) based on receiving powers of synchronization signals. Moreover, the first device 110 may select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB.
[0120] For example, the UE may select the SSB with the highest reference signal received power (RSRP) . Based on the selected SSB, the UE use the corresponding DTX / DRX configuration associated with the SSB. When the UE receives the latest unfiltered L1-RSRP measurement result, it may determine whether the current DTX / DRX configuration is changed based on the received measurement result. Table 6 shows an example of DTX / DRX configuration.
[0121] Table 6
[0122] In some embodiments, the first device 110 may receive, from the second device 120, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0123] The indication may be DCI including a DTX / DRX configuration. Moreover, when receiving the DCI, the UE may use the new DCI or may keep using the current DCI, according to the DTX / DRX configuration included. The RNTI for DCI may be a group common RNTI. Optionally, a cell level or broadcast RNTI may be used. Further, A group common RNTI may be configured by RRC message or SIB. A cell level or broadcast RNTI may use the current reserved RNTI, such as FFFA.
[0124] In this way, the DTX / DRX pattern of the first device can be controlled based on the location of the first device in an efficient way. Thus, the resources allocated to the first devices in each area can be managed based on the number of the first devices in that area in a flexible and efficient way.
[0125] There are problems in distinguishing the different states for the DTX / DRX of the DL coverage in NTN. Moreover, if traffic requirements increase in the coverage, the extension of active duration needs to be indicated. Additionally, when the traffic volume increase or decrease, or all UEs in the coverage change to a CONNECTED, IDLE, OR INACTIVE state, the method for updating the DTX pattern needs to be determined.
[0126] To solve the above and other related / potential issues, embodiments of the present disclosure propose an example DL transmission with DTX / DRX and related solution (s) . In a solution, A second device transmit, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) . The first state corresponds to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device. The second state corresponds to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed. The third state corresponds to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration. In the solution, the second device further performs the DTX / DRX in the coverage based on the information. In this way, by the use of new state (s) in DTX / DRX, the second device may perform operation based on the states. Thus, the second device can dynamically and flexibly change the states for the coverage in DTX / DRX, thereby enhancing the energy efficiency and bandwidth utilization of downlink (DL) transmission.
[0127] In some embodiments, the first device 110 and the second device 120 may be in a Non-Terrestrial Network (NTN) . Moreover, the first device 110 may be a terminal device, and the second device 120 may be a network device. For example, the first device 110 may be a UE, and the second device 120 may be a gNB.
[0128] Reference is made to FIG. 2, which illustrates a signaling flow 200 of downlink transmission with DTX / DRX in accordance with some embodiments of the present disclosure. As shown in FIG. 2, the signaling flow 200 involves the first device 110 and the second device 120 discussed with reference to FIG. 1. It is to be understood that although one terminal device 110 is illustrated in FIG. 2, the signal flow 200 may involve a plurality of terminal devices.
[0129] As shown in FIG. 2, the second device 120 transmits (205) , to the first device 110, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) and performs (230) the DTX / DRX in the coverage based on the information. The first device 110 receives (210) , from the second device 120, the information and performs (220) the DTX / DRX in the coverage based on the received information.
[0130] The information indicates one or more states for a coverage in DTX / DRX, for example, a first state, a second state and / or a third state. The first state corresponds to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device. The second state corresponds to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed. Moreover, the third state corresponds to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration.
[0131] In some embodiments, the first state may be referred to as an active state. The second state may be referred to a semi-active state. The third state may be referred to a non-active state. It is to be understood that the above are just examples of names for these states, without suggesting any limitation to the present disclosure. These states may have different names in other embodiments of the present disclosure.
[0132] In some embodiments, the coverage may include a cell, a beam, or other suitable coverage. For example, there may be cell DTX / DRX or beam DTX / DRX.
[0133] In some embodiments, if the cell / beam DTX / DRX is configured, the cell / beam DTX / DRX status may be set to activated or deactivated or the cell / beam DTX / DRX is activated by downlink control information (DCI) . Furthermore, if the cell / beam DTX / DRX is activated, there may be three states including active state, semi-active state, and non-active state. It should be noted that the names currently in use are non-limiting and may be various other possible designations. For the active state, the UE may monitor any channels and signals. For the semi-active state, only some common messages or signals may be transmitted, such as SSB, paging, system information block (SIB) , messages within the random access procedure. For the non-active state, the cell or beam will not transmit any signals.
[0134] In some embodiments, the information may comprise at least one of: the DTX / DRX cycle, a first set of parameters for the first state or a second set of parameters for the second state. The DTX / DRX cycle may determine the duration and periodicity of the DTX / DRX. In some embodiments, the DTX / DRX cycle may be celldtxdrx-Cycle or beamdtxdrx-Cycle. The first set of parameters for the first state may comprise at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration. In some embodiments, the first on-duration timer may be celldtxdrx-onDurationTimer or beamdtxdrx-onDurationTimer. The start offset for the first duration may be celldtxdrx-StartOffset or beamdtxdrx-StartOffset. Moreover, the slot offset for the first duration may be celldtxdrx-SlotOffset or beamdtxdrx-SlotOffset. The second set of parameters for the second state may comprise at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration. In some embodiments, the second on-duration timer may be celldtxdrx-SemiOnDurationTimer or beamdtxdrx-SemiOnDurationTimer. The start offset for the second duration may be celldtxdrx-SemiActivateStartOffset or beamdtxdrx-SemiActivateStartOffset. Furthermore, the slot offset for the second duration may be celldtxdrx-SemiActivateSlotOffset or beamdtxdrx-SemiActivateSlotOffset.
[0135] In some embodiments, the second on-duration timer may be determined based on the DTX / DRX cycle and the start offset for the second duration. Optionally, the second on-duration timer may start after the slot offset for the second duration from the beginning of a subframe. For example, if cell DTX is configured and activated, the cell DTX semi-active duration includes the time while: celldtx-SemiOnDurationTimer is running for the associated serving cell. If celldtxdrx-onDurationTimer is configured and [ (SFN × 10) +subframe number] modulo (celldtxdrx-Cycle) = (celldtxdrx-StartOffset) , celldtxdrx-onDurationTimer for this serving cell may start after celldtxdrx-SlotOffset from the beginning of the subframe. Moreover, the celldtx-SemiOnDurationTimer for the serving cell start after the celldtxdrx-SemiActiveSlotOffset from the beginning of the subframe, if [ (SFN × 10) + subframe number] modulo (celldtxdrx-Cycle) = (celldtxdrx-SemiActiveStartOffset) . The SFN is the number of the subframe. Table 7 shows the example for the second on-duration timer.
[0136] Table 7
[0137] In this way, the DTX / DRX is performed in three states according to the information. Thus, the downlink transmission with DTX / DRX is more flexible and efficient.
[0138] FIG. 6 illustrates a flowchart of a communication method 600 implemented at a first 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 first device 110 in FIG. 1.
[0139] At block 610, the first device 110 receives, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration.
[0140] At block 620, the first device 110 performs the DTX / DRX in the coverage based on the received information.
[0141] In some example embodiments, the information comprises at least one of: the DTX / DRX cycle; a first set of parameters for the first state comprising at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration; or a second set of parameters for the second state comprising at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration.
[0142] In some example embodiments, the second on-duration timer is determined based on the DTX / DRX cycle and the start offset for the second duration, and / or wherein the second on-duration timer starts after the slot offset for the second duration from the beginning of a subframe.
[0143] In some example embodiments, the first device is in the second state and DTX is activated, and the first device is further caused to perform at least one of: receiving at least one of a synchronization signal block or a channel state information-reference signal; monitoring a downlink control channel associated with a Radio Network Temporary Identifier (RNTI) ; or receiving a first system information block and / or system information (SI) .
[0144] In some example embodiments, the first device is in a Radio Resource Control (RRC) connected mode, and the monitoring a downlink control channel comprises monitoring system information (SI) change indication in a paging occasion at least once per modification duration, and / or wherein the first device is in a non RRC connected mode, and the monitoring a downlink control channel comprises monitoring Physical Downlink Control Channel (PDCCH) addressed to Paging Radio Network Temporary Identifier (P-RNTI) and System Information Radio Network Temporary Identifier (SI-RNTI) .
[0145] In some example embodiments, the first device is in the third state and DTX is activated, and the first device does not perform a monitoring operation.
[0146] In some example embodiments, the first device is in the second state and DRX is activated, and wherein the first device does not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR, or does not increment a counter for a SR, or does not start a timer for a SR, or does not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity, or does not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission, or does not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or initiate a Random Access procedure if an emergency service is initiated by upper layers and a serving cell is a Special Cell (SpCell) .
[0147] In some example embodiments, the first device is in the third state and DRX is activated, and wherein the first device does not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR, or does not increment a counter for a SR, or does not start a timer for a SR, or does not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity, or does not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission, or does not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or does not instruct the physical layer to transmit preamble and physical uplink shared channel (PUSCH) within 4-step random access channel (RACH) , or does not instruct the physical layer to transmit MSGA preamble and MSGA PUSCH within 4-step RACH.
[0148] In some example embodiments, the first state is an active state, the second state is a semi-active state, and / or the third state is non-active state.
[0149] In some example embodiments, the coverage comprises at least one of a cell or a beam.
[0150] In some example embodiments, the first device may receive an extension indication for extending at least one of the first duration or the second duration; and perform the DTX / DRX based on the received information and the extension indication.
[0151] In some example embodiments, the extension indication comprises at least one of:an extension duration for extending a time length of the at least one of the first duration or the second duration, or an extension offset indicating a start of the extension duration.
[0152] In some example embodiments, the first device may receive, from the second device, a list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations, and wherein the extension indication indicates a target extension duration and a corresponding target extension offset in the list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations.
[0153] In some example embodiments, the first device may receive, from the second device, a pause indication indicating termination of at least one of the first duration or the second duration; and / or receive, from the second device, an update indication indicating: an updated duration and an update offset, or an updated index indicating one of a list of candidate durations and candidate offsets.
[0154] In some example embodiments, the first device may receive, from the second device, a DTX / DRX configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the received information and the DTX / DRX configuration.
[0155] In some example embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0156] In some example embodiments, the first device may determine the area where the first device is located based on the index of the area or the geographical area information; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.
[0157] In some example embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0158] In some example embodiments, the first device may determine a synchronization signal block (SSB) based on receiving powers of synchronization signals; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB.
[0159] In some example embodiments, the first device may receive, from the second device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0160] In some example embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0161] FIG. 7 illustrates a flowchart of a communication method 700 implemented at a first 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 first device 110 in FIG. 1.
[0162] At block 710, the first device 110 receives, from a second device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam.
[0163] At block 720, the first device 110 performs the DTX / DRX based on the DTX / DRX configuration.
[0164] In some example embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0165] In some example embodiments, the first device may determine the area where the first device is located based on the index of the area or the geographical area information; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.
[0166] In some example embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0167] In some example embodiments, the first device may determine a synchronization signal block (SSB) based on receiving powers of synchronization signals; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB.
[0168] In some example embodiments, the first device may receive, from the second device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0169] In some example embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0170] FIG. 8 illustrates a flowchart of a communication method 800 implemented at a second 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 second device 120 in FIG. 1.
[0171] At block 810, the second device 120 transmits, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration.
[0172] At block 820, the second device 120 performs the DTX / DRX in the coverage based on the information.
[0173] In some example embodiments, the information comprises at least one of: the DTX / DRX cycle; a first set of parameters for the first state comprising at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration; or a second set of parameters for the second state comprising at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration.
[0174] In some example embodiments, the second on-duration timer is determined based on the DTX / DRX cycle and the start offset for the second duration, and / or wherein the second on-duration timer starts after the slot offset for the second duration from the beginning of a subframe.
[0175] In some example embodiments, the first state is an active state, the second state is a semi-active state, and / or the third state is non-active state.
[0176] In some example embodiments, the coverage comprises at least one of a cell or a beam.
[0177] In some example embodiments, the second device may transmit, to the first device, an extension indication for extending at least one of the first duration or the second duration; and perform the DTX / DRX based on the information and the extension indication.
[0178] In some example embodiments, the extension indication comprises at least one of:an extension duration for extending a time length of the at least one of the first duration or the second duration, or an extension offset indicating a start of the extension duration.
[0179] In some example embodiments, the second device may transmit, to the first device, a list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations, and wherein the extension indication indicates a target extension duration and a corresponding target extension offset in the list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations.
[0180] In some example embodiments, the second device may transmit, to the first device, a pause indication indicating termination of at least one of the first duration or the second duration; and / or transmit, to the first device, an update indication indicating: an updated duration and an update offset, or an updated index indicating one of a list of candidate durations and candidate offsets.
[0181] In some example embodiments, the second device may transmit, to the first device, a DTX / DRX configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the received information and the DTX / DRX configuration.
[0182] In some example embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0183] In some example embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0184] In some example embodiments, the second device may transmit, to the first device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0185] In some example embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0186] FIG. 9 illustrates a flowchart of a communication method 900 implemented at a second 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 second device 120 in FIG. 1.
[0187] At block 910, the second device 110 transmits, to a first device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam.
[0188] In some example embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0189] In some example embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0190] In some example embodiments, the second device may transmit, to the first device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0191] In some example embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0192] FIG. 10 is a simplified block diagram of a device 1000 that is suitable for implementing embodiments of the present disclosure. The device 1000 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1000 can be implemented at or as at least a part of the first device 110 or the second device 120.
[0193] As shown, the device 1000 includes a processor 1010, a memory 1020 coupled to the processor 1010, a suitable transceiver 1040 coupled to the processor 1010, and a communication interface coupled to the transceiver 1040. The memory 1020 stores at least a part of a program 1030. The transceiver 1040 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1040 may include at least one of a transmitter 1042 and a receiver 1044. The transmitter 1042 and the receiver 1044 may be functional modules or physical entities. The transceiver 1040 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.
[0194] The program 1030 is assumed to include program instructions that, when executed by the associated processor 1010, enable the device 1000 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 9. The embodiments herein may be implemented by computer software executable by the processor 1010 of the device 1000, or by hardware, or by a combination of software and hardware. The processor 1010 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1010 and memory 1020 may form processing means 1050 adapted to implement various embodiments of the present disclosure.
[0195] The memory 1020 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 1020 is shown in the device 1000, there may be several physically distinct memory modules in the device 1000. The processor 1010 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 1000 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.
[0196] According to embodiments of the present disclosure, a first device comprising a circuitry is provided. The circuitry is configured to: receive, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and perform the DTX / DRX in the coverage based on the received information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the first device as discussed above.
[0197] According to embodiments of the present disclosure, a first device comprising a circuitry is provided. The circuitry is configured to: receive, from a second device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the DTX / DRX configuration. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the first device as discussed above.
[0198] According to embodiments of the present disclosure, a second device comprising a circuitry is provided. The circuitry is configured to: transmit, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and perform the DTX / DRX in the coverage based on the information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the second device as discussed above.
[0199] According to embodiments of the present disclosure, a second device comprising a circuitry is provided. The circuitry is configured to: transmit, to a first device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the DTX / DRX configuration. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the second device as discussed above.
[0200] 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.
[0201] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and means for performing the DTX / DRX in the coverage based on the received information. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 600. In some example embodiments, the first 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.
[0202] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a second device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and means for performing the DTX / DRX based on the DTX / DRX configuration. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 700. In some example embodiments, the second 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.
[0203] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and means for performing the DTX / DRX in the coverage based on the information. In some embodiments, the third apparatus may comprise means for performing the respective operations of the method 800. In some example embodiments, the third 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.
[0204] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting, to a first device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and means for performing the DTX / DRX based on the DTX / DRX configuration. In some embodiments, the fourth apparatus may comprise means for performing the respective operations of the method 900. In some example embodiments, the fourth 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.
[0205] In summary, embodiments of the present disclosure provide the following aspects.
[0206] In an aspect, it is proposed a first device comprising: a processor configured to cause the first device to: receive, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and perform the DTX / DRX in the coverage based on the received information.
[0207] In some embodiments, the information comprises at least one of: the DTX / DRX cycle; a first set of parameters for the first state comprising at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration; or a second set of parameters for the second state comprising at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration.
[0208] In some embodiments, the second on-duration timer is determined based on the DTX / DRX cycle and the start offset for the second duration, and / or wherein the second on-duration timer starts after the slot offset for the second duration from the beginning of a subframe.
[0209] In some embodiments, the first device is in the second state and DTX is activated, and the first device is further caused to perform at least one of: receiving at least one of a synchronization signal block or a channel state information-reference signal; monitoring a downlink control channel associated with a Radio Network Temporary Identifier (RNTI) ; or receiving a first system information block and / or system information (SI) .
[0210] In some embodiments, the first device is in a Radio Resource Control (RRC) connected mode, and the monitoring a downlink control channel comprises monitoring system information (SI) change indication in a paging occasion at least once per modification duration, and / or wherein the first device is in a non RRC connected mode, and the monitoring a downlink control channel comprises monitoring Physical Downlink Control Channel (PDCCH) addressed to Paging Radio Network Temporary Identifier (P-RNTI) and System Information Radio Network Temporary Identifier (SI-RNTI) .
[0211] In some embodiments, the first device is in the third state and DTX is activated, and the first device does not perform a monitoring operation.
[0212] In some embodiments, the first device is in the second state and DRX is activated, and wherein the first device does not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR, or does not increment a counter for a SR, or does not start a timer for a SR, or does not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity, or does not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission, or does not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or initiate a Random Access procedure if an emergency service is initiated by upper layers and a serving cell is a Special Cell (SpCell) .
[0213] In some embodiments, the first device is in the third state and DRX is activated, and wherein the first device does not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR, or does not increment a counter for a SR, or does not start a timer for a SR, or does not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity, or does not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission, or does not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or does not instruct the physical layer to transmit preamble and physical uplink shared channel (PUSCH) within 4-step random access channel (RACH) , or does not instruct the physical layer to transmit MSGA preamble and MSGA PUSCH within 4-step RACH.
[0214] In some embodiments, the first state is an active state, the second state is a semi-active state, and / or the third state is non-active state.
[0215] In some embodiments, the coverage comprises at least one of a cell or a beam.
[0216] In some embodiments, the first device is further caused to: receive an extension indication for extending at least one of the first duration or the second duration; and perform the DTX / DRX based on the received information and the extension indication.
[0217] In some embodiments, the extension indication comprises at least one of: an extension duration for extending a time length of the at least one of the first duration or the second duration, or an extension offset indicating a start of the extension duration.
[0218] In some embodiments, the first device is further caused to: receive, from the second device, a list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations, and wherein the extension indication indicates a target extension duration and a corresponding target extension offset in the list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations.
[0219] In some embodiments, the first device is further caused to: receive, from the second device, a pause indication indicating termination of at least one of the first duration or the second duration; and / or receive, from the second device, an update indication indicating: an updated duration and an update offset, or an updated index indicating one of a list of candidate durations and candidate offsets.
[0220] In some embodiments, the first device is further caused to: receive, from the second device, a DTX / DRX configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the received information and the DTX / DRX configuration.
[0221] In some embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0222] In some embodiments, the first device is further caused to: determine the area where the first device is located based on the index of the area or the geographical area information; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.
[0223] In some embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0224] In some embodiments, the first device is further caused to: determine a synchronization signal block (SSB) based on receiving powers of synchronization signals; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB.
[0225] In some embodiments, the first device is further caused to: receive, from the second device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0226] In some embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0227] In an aspect, it is proposed a first device comprising: a processor configured to cause the first device to: receive, from a second device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the DTX / DRX configuration.
[0228] In some embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0229] In some embodiments, the first device is further caused to: determine the area where the first device is located based on the index of the area or the geographical area information; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.
[0230] In some embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0231] In some embodiments, the first device is further caused to: determine a synchronization signal block (SSB) based on receiving powers of synchronization signals; and select, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB index.
[0232] In some embodiments, the first device is further caused to: receive, from the second device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0233] In some embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0234] In an aspect, it is proposed a second device comprising: a processor configured to cause the second device to: transmit, to a first device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; and perform the DTX / DRX in the coverage based on the information.
[0235] In some embodiments, the information comprises at least one of: the DTX / DRX cycle; a first set of parameters for the first state comprising at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration; or a second set of parameters for the second state comprising at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration.
[0236] In some embodiments, the second on-duration timer is determined based on the DTX / DRX cycle and the start offset for the second duration, and / or wherein the second on-duration timer starts after the slot offset for the second duration from the beginning of a subframe.
[0237] In some embodiments, the first state is an active state, the second state is a semi-active / partial-active state, and / or the third state is non-active state.
[0238] In some embodiments, the coverage comprises at least one of a cell or a beam.
[0239] In some embodiments, the second device is further caused to: transmit, to the first device, an extension indication for extending at least one of the first duration or the second duration; and perform the DTX / DRX based on the information and the extension indication.
[0240] In some embodiments, the extension indication comprises at least one of: an extension duration for extending a time length of the at least one of the first duration or the second duration, or an extension offset indicating a start of the extension duration.
[0241] In some embodiments, the second device is further caused to: transmit, to the first device, a list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations, and wherein the extension indication indicates a target extension duration and a corresponding target extension offset in the list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations.
[0242] In some embodiments, the second device is further caused to: transmit, to the first device, a pause indication indicating termination of at least one of the first duration or the second duration; and / or transmit, to the first device, an update indication indicating: an updated duration and an update offset, or an updated index indicating one of a list of candidate durations and candidate offsets.
[0243] In some embodiments, the second device is further caused to: transmit, to the first device, a DTX / DRX configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the received information and the DTX / DRX configuration.
[0244] In some embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0245] In some embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0246] In some embodiments, the second device is further caused to: transmit, to the first device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0247] In some embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0248] In an aspect, it is proposed a second device comprising: a processor configured to cause the second device to: transmit, to a first device, a discontinuous transmission and / or discontinuous reception (DTX / DRX) configuration associated with a beam, the DTX / DRX configuration comprising at least one of: an index of the beam, an index of the DTX / DRX configuration, an index of an area where the first device is located, geographical area information, or at least one DTX / DRX pattern for the beam; and perform the DTX / DRX based on the DTX / DRX configuration.
[0249] In some embodiments, a DTX / DRX pattern comprises at least one of: a DTX / DRX start offset, a DTX / DRX slot offset, or a DTX / DRX on duration timer.
[0250] In some embodiments, the geographical area information comprises at least one of a reference location or a distance radius.
[0251] In some embodiments, the second device is further caused to: transmit, to the first device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
[0252] In some embodiments, the first device and the second device are in a Non-Terrestrial Network (NTN) , the first device is a terminal device, and the second device is a network device.
[0253] In an aspect, a first 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 first device discussed above.
[0254] In an aspect, a first 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 first device discussed above.
[0255] In an aspect, a second 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 second device discussed above.
[0256] In an aspect, a second 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 second device discussed above.
[0257] 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 first device discussed above.
[0258] 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 first device discussed above.
[0259] 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 second device discussed above.
[0260] 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 second device discussed above.
[0261] 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 first device discussed above.
[0262] 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 first device discussed above.
[0263] 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 second device discussed above.
[0264] 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 second device discussed above.
[0265] 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.
[0266] 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 10. 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.
[0267] 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.
[0268] 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.
[0269] 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.
[0270] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A first device comprising:a processor configured to cause the first device to:receive, from a second device, information indicating at least one of a first state, a second state or a third state for a coverage in discontinuous transmission and / or discontinuous reception (DTX / DRX) , the first state corresponding to a first duration in a DTX / DRX cycle during which the first device is allowed to communicate with the second device, the second state corresponding to a second duration in the DTX / DRX cycle during which only communications of one or more common signals are allowed, and the third state corresponding to a third duration in the DTX / DRX cycle which is non-overlapping with the first duration and the second duration; andperform the DTX / DRX in the coverage based on the received information.2.The first device of claim 1, wherein the information comprises at least one of:the DTX / DRX cycle;a first set of parameters for the first state comprising at least one of a first on-duration timer indicating a time length of the first duration, a start offset for the first duration, or a slot offset for the first duration; ora second set of parameters for the second state comprising at least one of a second on-duration timer indicating a time length of the second duration, a start offset for the second duration, or a slot offset for the second duration.3.The first device of claim 2, wherein the second on-duration timer is determined based on the DTX / DRX cycle and the start offset for the second duration, and / orwherein the second on-duration timer starts after the slot offset for the second duration from the beginning of a subframe.4.The first device of any of claims 1 to 3, wherein the first device is in the second state and DTX is activated, and the first device is further caused to perform at least one of:receiving at least one of a synchronization signal block or a channel state information-reference signal;monitoring a downlink control channel associated with a Radio Network Temporary Identifier (RNTI) ; orreceiving a first system information block and / or system information (SI) .5.The first device of claim 4, wherein the first device is in a Radio Resource Control (RRC) connected mode, and the monitoring a downlink control channel comprises monitoring system information (SI) change indication in a paging occasion at least once per modification duration, and / orwherein the first device is in a non RRC connected mode, and the monitoring a downlink control channel comprises monitoring Physical Downlink Control Channel (PDCCH) addressed to Paging Radio Network Temporary Identifier (P-RNTI) , System Information Radio Network Temporary Identifier (SI-RNTI) , Random Access Radio Network Temporary Identifier (RA-RNTI) , Temporary Cell-Radio Network Temporary Identifier (TC-RNTI) , and / or Message B Radio Network Temporary Identifier (MSGB-RNTI) .6.The first device of any of claims 1 to 3, wherein the first device is in the third state and DTX is activated, and the first device does not perform a monitoring operation.7.The first device of any of claims 1 to 3, wherein the first device is in the second state and DRX is activated, andwherein the first device does not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR, or does not increment a counter for a SR, or does not start a timer for a SR, or does not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity, or does not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission, or does not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or initiate a Random Access procedure if an emergency service is initiated by upper layers and a serving cell is a Special Cell (SpCell) .8.The first device of any of claims 1 to 3, wherein the first device is in the third state and DRX is activated, andwherein the first device does not instruct a physical layer to signal a Scheduling Request (SR) on a physical uplink shared channel (PUCCH) resource for SR, or does not increment a counter for a SR, or does not start a timer for a SR, or does not deliver a configured uplink grant and the associated hybrid automatic repeat request (HARQ) information to the HARQ entity, or does not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission, or does not report channel status information (CSI) on physical uplink shared channel (PUCCH) and semi-persistent CSI configured on PUSCH, or does not instruct the physical layer to transmit preamble and physical uplink shared channel (PUSCH) within 4-step random access channel (RACH) , or does not instruct the physical layer to transmit MSGA preamble and MSGA PUSCH within 4-step RACH.9.The first device of any of claims 1 to 8, wherein the first state is an active state, the second state is a semi-active state, and / or the third state is non-active state.10.The first device of any of claims 1 to 9, wherein the coverage comprises at least one of a cell or a beam.11.The first device of any of claims 1 to 10, wherein the first device is further caused to:receive an extension indication for extending at least one of the first duration or the second duration; andperform the DTX / DRX based on the received information and the extension indication.12.The first device of claim 11, wherein the extension indication comprises at least one of:an extension duration for extending a time length of the at least one of the first duration or the second duration, oran extension offset indicating a start of the extension duration.13.The first device of claim 11, wherein the first device is further caused to:receive, from the second device, a list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations, andwherein the extension indication indicates a target extension duration and a corresponding target extension offset in the list of candidate extension durations and candidate extension offsets corresponding to the candidate extension durations.14.The first device of any of claims 1 to 13, wherein the first device is further caused to:receive, from the second device, a pause indication indicating termination of at least one of the first duration or the second duration; and / orreceive, from the second device, an update indication indicating: an updated duration and an update offset, or an updated index indicating one of a list of candidate durations and candidate offsets.15.The first device of any of claims 1 to 14, wherein the first device is further caused to:receive, from the second device, a DTX / DRX configuration associated with a beam, the DTX / DRX configuration comprising at least one of:an index of the beam,an index of the DTX / DRX configuration,an index of an area where the first device is located,geographical area information, orat least one DTX / DRX pattern for the beam; andperform the DTX / DRX based on the received information and the DTX / DRX configuration.16.The first device of claim 15, wherein a DTX / DRX pattern comprises at least one of:a DTX / DRX start offset,a DTX / DRX slot offset, ora DTX / DRX on duration timer.17.The first device of claim 15, wherein the first device is further caused to:determine the area where the first device is located based on the index of the area or the geographical area information; andselect, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the area.18.The first device of any of claims 15 to 17, wherein the geographical area information comprises at least one of a reference location or a distance radius.19.The first device of claim 15, wherein the first device is further caused to:determine a synchronization signal block (SSB) based on receiving powers of synchronization signals; andselect, from the at least one DTX / DRX pattern, a target DTX / DRX pattern for performing the DTX / DRX based on the SSB.20.The first device of claim 15, wherein the first device is further caused to:receive, from the second device, an indication indicating a target pattern among the at least one DTX / DRX pattern for used by the first device.
Citation Information
Patent Citations
Cell discontinuous transmission and reception
US20240237133A1
Communication method and user equipment
US20240237135A1
Antenna panel management method, apparatus and system
WO2022032596A1