Devices and methods of communication
By configuring NES techniques with UE-specific timing adjustments, the challenges of timing misalignment and inefficiencies in NTN systems are addressed, achieving enhanced energy savings and power control through aligned DTX/DRX and cell barring in NTN.
Patent Information
- Application Number
- PCT/CN2023/134505
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-27
- Publication Date
- 2026-03-05
AI Technical Summary
Existing NES techniques for terrestrial networks are not effectively adapted for non-terrestrial networks (NTN), leading to timing misalignments and inefficiencies due to large propagation delays, which affect the activation of satellite beams and energy consumption in NTN systems.
Implementing a configuration for network energy saving (NES) in NTN by controlling the active periods of discontinuous transmission (DTX) or discontinuous reception (DRX) based on a time offset and determining the status of cell barring, with UE-specific timing adjustments to align with satellite movement and propagation delays.
Enhances energy savings and efficient power control in NTN by aligning DTX/DRX timings and cell barring status, ensuring optimal satellite beam activation and UE communication efficiency.
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Figure CN2023134505_05032026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS OF COMMUNICATIONTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to devices and methods of communication for network energy saving (NES) in a non-terrestrial network (NTN) .BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations (BSs) , which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .
[0003] For NTN, due to limited processing payload and bandwidth, a satellite with limited transmission power and limited processing bandwidth may only serve part of potential satellite coverage area at the same time. Thus, there is a strong need to implement downlink coverage enhancement techniques to maximize the number of satellite beams that can be activated simultaneously, and to ensure that all UEs can be served across the satellite coverage through dynamic and efficient power control. This motivation has driven satellite operators and vendors to consider applying NES techniques in NTN.SUMMARY
[0004] The present disclosure relates to methods, apparatuses, and systems that support NES in NTN. By receiving a configuration (for convenience, also referred to as a first configuration or an NES configuration herein) for NES for an NTN cell and performing an operation for NES based on the configuration, UE may apply one or more NES techniques in NTN. In this way, an NTN cell may be allowed to use NES techniques with coordination and enhancement at UE side.
[0005] In one aspect, some implementations of the method and apparatuses described herein may comprise: receiving, at a user equipment from a base station, a first configuration for NES for an NTN cell; and performing, based on the first configuration, an operation comprising at least one of the following: controlling, based on a time offset, an active period of a discontinuous transmission (DTX) or discontinuous reception (DRX) from the NTN cell; or determining a status of cell barring for the NTN cell.
[0006] In some implementations of the method and apparatuses described herein, the first configuration may indicate the DTX or DRX, and determining the time offset may comprise at least one of the following: receiving an indication of the time offset from the base station via the transceiver; or determining the time offset based on at least one of the following: a single trip time (STT) between the user equipment and the base station; a round trip time (RTT) between the user equipment and the base station; a timing advance (TA) value applied by the user equipment; a TA value reported by the user equipment; or a configured time offset.
[0007] Some implementations of the method and apparatuses described herein may further comprise: updating the time offset based on at least one of the following: at least one timing advance command (TAC) is received during a non-active period of the DTX or DRX; satellite ephemeris is updated during the non-active period; a NTN-specific system information block (SIB) is reacquired during the non-active period; or a position of the user equipment is updated during the non-active period.
[0008] In some implementations of the method and apparatuses described herein, controlling the active period may comprise at least one of the following: applying the time offset to a start of the active period; or extending the active period with the time offset.
[0009] In some implementations of the method and apparatuses described herein, applying the time offset may comprise at least one of the following: delaying the start of the active period of the DTX by the time offset; or advancing the start of the active period of the DRX by the time offset.
[0010] In some implementations of the method and apparatuses described herein, extending the active period may comprise at least one of the following: extending a length of a first timer that controls the DTX by applying the time offset to an end of the first timer; extending a length of a second timer that controls the DRX by applying the time offset to a start of the second timer; starting the first timer with a length determined by a configured value for the first timer plus the time offset; or starting the second timer with a length determined by a configured value for the second timer plus the time offset.
[0011] Some implementations of the method and apparatuses described herein may further comprise: in accordance with a determination that a first timing corresponding to the start of the active period upon applying of the time offset has passed, determining a length of the active period by excluding a time duration between the first timing and a second timing of applying the time offset.
[0012] In some implementations of the method and apparatuses described herein, the first configuration may comprise first information that the NTN cell is barred or not barred for NES. Some implementations of the method and apparatuses described herein may further comprise: receiving, from the base station, a configuration (for convenience, also referred to as a second configuration or an NTN configuration herein) for NTN comprising second information that the NTN cell is barred or not barred for NTN. In some implementations of the method and apparatuses described herein, determining the status of cell barring for the NTN cell may comprise: determining the status of cell barring for the NTN cell based on the first information and the second information.
[0013] In some implementations of the method and apparatuses described herein, determining the status of cell barring for the NTN cell based on the first information and the second information may comprise: in accordance with a determination that the NTN cell is barred for NES or NTN, determining that the NTN cell is barred; and in accordance with a determination that the NTN cell is not barred for NES and the NTN cell is not barred for NTN, determining that the NTN cell is not barred.
[0014] In some implementations of the method and apparatuses described herein, determining the status of cell barring for the NTN cell based on the first information and the second information may comprise: in accordance with a determination that the NTN cell is not barred for NES, determining whether the NTN cell is not barred for NTN; in accordance with a determination that the NTN cell is barred for NTN, determining that the NTN cell is barred for both NTN and NES; and in accordance with a determination that the NTN cell is not barred for NTN, determining that the NTN cell is not barred for both NTN and NES.
[0015] In some implementations of the method and apparatuses described herein, determining the status of cell barring for the NTN cell based on the first information and the second information may comprise: in accordance with a determination that the NTN cell is not barred for NTN, determining whether the NTN cell is not barred for NES; in accordance with a determination that the NTN cell is barred for NES, determining that the NTN cell is barred for both NTN and NES; and in accordance with a determination that the NTN cell is not barred for NES, determining that the NTN cell is not barred for both NTN and NES.
[0016] In some implementations of the method and apparatuses described herein, the first configuration may comprise third information that the NTN cell is barred or not barred for both NES and NTN, and determining the status of cell barring for the NTN cell may comprise: determining the status of cell barring for the NTN cell based on the third information.
[0017] Some implementations of the method and apparatuses described herein may further comprise: in accordance with a determination that a report from the user equipment to the base station is triggered during a non-active period of the DTX or DRX and that no configured grant (CG) resources are available for the report, performing an operation comprising at least one of the following: waiting for a CG resource available for the report after the non-active period; transmitting a scheduling request to the base station via the transceiver; or initiating a random access procedure.
[0018] In some implementations of the method and apparatuses described herein, the report may comprise at least one of the following: a timing advance (TA) report; a propagation delay difference (PDD) report; a location-based measurement report; a time-based measurement report; a global navigation satellite system (GNSS) position fix duration report; or a GNSS validity duration report.
[0019] Some implementations of the method and apparatuses described herein may further comprise at least one of the following: in accordance with a determination that a condition triggering the report is unfulfilled upon an uplink resource is available for the report, discarding the report; in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, resuming the report; in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, updating the report; or in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, reporting a time stamp indicating when the report is triggered.
[0020] In another aspect, some implementations of the method and apparatuses described herein may comprise: generating, at a base station, a first configuration for NES for an NTN cell; and transmitting the first configuration to a user equipment, the first configuration being used for at least one of the following: control of an active period of a DTX or DRX from the NTN cell based on a time offset; or determination of a status of cell barring for the NTN cell.
[0021] In some implementations of the method and apparatuses described herein, the first configuration may indicate the DTX or DRX. Some implementations of the method and apparatuses described herein may further comprise: transmitting an indication of the time offset to the user equipment.
[0022] In some implementations of the method and apparatuses described herein, the first configuration may comprise third information that the NTN cell is barred or not barred for both NES and NTN.
[0023] In some implementations of the method and apparatuses described herein, a report from the user equipment to the base station is triggered during a non-active period of the DTX or DRX and upon no CG resources are available for the report. Some implementations of the method and apparatuses described herein may further comprise at least one of the following: receiving, from the user equipment, the report at a CG resource available for the report after the non-active period; receiving, from the user equipment, a scheduling request for the report; or receiving, from the user equipment, a random access request for the report.BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 illustrates an example of a wireless communications system that supports NES in NTN in accordance with aspects of the present disclosure.
[0025] FIG. 2A illustrates an example configuration of cell DTX / DRX in accordance with aspects of the present disclosure.
[0026] FIG. 2B illustrates an example cell DTX / DRX timing misalignment between UE and BS in accordance with aspects of the present disclosure.
[0027] FIG. 2C illustrates an example propagation delay variation during a non-active period of cell DTX / DRX in accordance with aspects of the present disclosure.
[0028] FIG. 2D illustrates example cell barring logics for NTN and NES in accordance with aspects of the present disclosure.
[0029] FIG. 3 illustrates an example of a process that supports NES in NTN in accordance with aspects of the present disclosure.
[0030] FIG. 4A illustrates an example cell barring considering both NES and NTN in accordance with aspects of the present disclosure.
[0031] FIG. 4B illustrates another example cell barring considering both NES and NTN in accordance with aspects of the present disclosure.
[0032] FIG. 4C illustrates still another example cell barring considering both NES and NTN in accordance with aspects of the present disclosure.
[0033] FIG. 5 illustrates an example of a device that supports NES in NTN in accordance with aspects of the present disclosure.
[0034] FIG. 6 illustrates an example of a processor that supports NES in NTN in accordance with aspects of the present disclosure.
[0035] FIG. 7 illustrates a flowchart of a method that supports NES in NTN in accordance with aspects of the present disclosure.
[0036] FIG. 8 illustrates a flowchart of another method that supports NES in NTN in accordance with aspects of the present disclosure.DETAILED DESCRIPTION
[0037] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.
[0038] 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.
[0039] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described. The term “embodiment” may be interchangeably used with “implementation” .
[0040] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of implementations. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0041] The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of example implementations. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0042] In the context of the present disclosure, the term “a connected state” may be interchangeably used with “an RRC_CONNECTED state” , the term “an idle state” may be interchangeably used with “an RRC_IDLE state” , and the term “an inactive state” may be interchangeably used with “an RRC_INACTIVE state” . In the context of the present disclosure, the term “above” herein may be interchangeably used with “higher than or equal to” or “greater than or equal to” . The term “below” herein may be interchangeably used with “lower than or equal to” or “smaller than or equal to” . For convenience, the term “DTX or DRX from a NTN cell” herein may be interchangeably used with “cell DTX / DRX” or “cell DTX or DRX” .
[0043] As known, NES may involve many kinds of NES technologies such as cell DTX / DRX, cell barring, on-demand system information request / transmission or the like. It is to be understood that the term “supporting NES” herein may refer to supporting at least one of the NES technologies.
[0044] Embodiments of the present disclosure provide a solution of NES in NTN. In the solution, a base station generates an NES configuration for an NTN cell and transmits the NES configuration to UE. Based on the NES configuration, the UE performs an operation comprising at least one of the following: controlling, based on a time offset, an active period of a DTX or DRX from the NTN cell; or determining a status of cell barring for the NTN cell. In this way, an NTN cell may be allowed to use NES techniques with coordination and enhancement at UE side.
[0045] Aspects of the present disclosure are described in the context of a wireless communications system.
[0046] FIG. 1 illustrates an example of a wireless communications system 100 that supports obtaining of a DL transmission in NES in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities (also referred to as network equipment (NE) ) . For convenience, network entities 102-1, 102-2 and 102-3 are shown and are collectively referred to as one or more network entities 102 hereinafter. The wireless communications system 100 may further include one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0047] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
[0048] A network entity 102 may provide one or more geographic coverage areas (also referred to as cells) for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within a geographic coverage area. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas associated with the same or different radio access technologies may overlap, but the different geographic coverage areas may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0049] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.
[0050] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0051] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0052] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .
[0053] As an example, the network entity 102-1 may provide a cell 112-1 and the network entity 102-2 may provide a cell 112-2. It is to be understood that each of the network entities 102-1 and 102-2 may provide more cells (not shown) .
[0054] In an example, the network entity may be a satellite, for example, the network entity 102-3. The network entity 102-3 may have full or part of an eNB / gNB on board. The communication link 110 between the network entity 102-3 and the UE 104, the communication link 116 between the network entity 102-3 and the network entity 102-2, and the communication link 116 between the network entity 102-2 and the core network 106 may be used for an NTN transparent mode. The communication link 110 between the satellite 102-3 and the UE 104, and the communication link 116 between the network entity 102-3 (e.g., with a base station on board) and the core network 106 may be used for a NTN regenerative mode.
[0055] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.
[0056] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a TRP. One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0057] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.
[0058] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0059] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0060] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0061] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0062] In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0063] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0064] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0065] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0066] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0067] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0068] NTN refers to a network, or segment of networks using radio frequency resources on board a satellite. The satellite in NTN may be a geostationary earth orbiting (GEO) satellite with fixed location to the earth, or a low earth orbiting (LEO) satellite orbiting around the earth. Due to limited processing payload and bandwidth, a satellite with limited transmission power and limited processing bandwidth may only serve part of the potential satellite coverage area at the same time. As a result, there is a strong need to implement downlink coverage enhancement techniques to maximize the number of satellite beams that can be activated simultaneously, and to ensure that all UEs can be served across the satellite coverage through dynamic and efficient power control. This motivation has driven satellite operators and vendors to consider NES techniques introduced for a terrestrial network (TN) to relax a duty cycle of different satellite beams. Recently, it has been proposed to apply NES in NTN.
[0069] NES aims to develop techniques that can improve the network energy savings in time, frequency, spatial, and power domains, with potential information exchange and coordination over network interfaces. Some specific techniques for NES, including cell DTX / DRX, NES cell barring and UE transmission during a non-active period, are discussed and specified for TN without consideration on NTN characteristics such as large propagation delay, NTN cell barring and NTN-specific UE reporting.
[0070] For the time domain, cell DTX / DRX may be introduced to allow network to set up non-active periods for specific channels to reduce energy consumption when there is few UE or service expected. To facilitate this, UE may be configured with a periodic cell DTX / DRX pattern (i.e. active and non-active periods) .
[0071] The pattern configuration for cell DTX / DRX may be common for the UEs configured with this feature in the cell, and the cell DTX and cell DRX patterns may be configured and activated separately. When cell DTX is configured and activated for a concerned cell, the UE may not monitor physical downlink control channel (PDCCH) in selected cases or semi-persistent scheduling (SPS) occasions during a non-active period of cell DTX. When cell DRX is configured and activated for a concerned cell, the UE may not transmit on CG resources or transmit a scheduling request (SR) during a non-active period of cell DRX. This feature may be only applicable to UEs in RRC_CONNECTED state and may not impact a random access procedure, a synchronization signal block (SSB) transmission, a paging, and a system information broadcasting.
[0072] FIG. 2A illustrates an example configuration 200A of cell DTX / DRX in accordance with aspects of the present disclosure. As shown in FIG. 2A, a cell DTX / DRX configuration may indicate an active period 201 of the cell DTX / DRX, a cycle 202 of the cell DTX / DRX and cycle start time 203 of the cell DTX / DRX. The active period 201 specifies a time duration that UE waits for to receive PDCCHs or SPS occasions and transmit SR or CG. For example, the active period 201 may be configured as celldtx-onDurationTimer / celldrx-onDurationTimer. The cycle 202 specifies a periodic repetition of the active-period followed by a non-active period. For example, the cycle 202 may be configured as celldtx-Cycle / celldrx-Cycle. The cycle start time 203 specifies a start timing of the cycle 202. For example, the cycle start time 203 may be configured as a start offset such as celldtx-StartOffset / celldrx-StartOffset (in which subframe) and a slot offset such as celldtx-SlotOffset / celldtx-SlotOffset (in which slot of that subframe) .
[0073] In the cell DTX / DRX designed for TN, a propagation delay may be ignored (e.g., 0.033ms for 10km TN cell radius) . The timings of the cell DTX / DRX duration (active and non-active) at UE and BS sides may be assumed as aligned, i.e., all NES-capable UEs in the same cell may directly apply common cell DTX / DRX parameters configured by BS.
[0074] For NTN, due to a large propagation delay that cannot be ignored (e.g., 4ms~240ms for 600km~36000km NTN satellite orbit) , the timings of the cell DTX / DRX duration at UE and BS sides may be different. If UE continues to follow the specifications designed for TN usage, a cell DTX / DRX timing misalignment may occur. FIG. 2B illustrates an example cell DTX / DRX timing misalignment 200B between UE and BS in accordance with aspects of the present disclosure. As shown in FIG. 2B, a reference sign 210 denotes misalignment in cell DTX, and a reference sign 220 denotes misalignment in cell DRX. With reference to FIG. 2B, for cell DTX, UE may either miss possible transmission from BS, e.g., in time intervals 211 and 212, or monitor PDCCH too early with unnecessary power consumption, e.g., in time intervals 213 and 214. For cell DRX, UE may initiate transmission to the BS too late, e.g., in time intervals 221 and 222.
[0075] Moreover, due to different propagation delays among UEs in an NTN cell, a common cell DTX / DRX configuration with a timing offset to address the propagation delays is not possible. To address this issue, a UE-specific timing offset reflecting the propagation delay between UE and gNB is expected to be applied.
[0076] The following issue is how to determine a value of the timing offset. In particular, the propagation delay may vary due to satellite (and UE) movement during a non-active period of cell DTX / DRX in which UE may not receive TAC or satellite ephemeris may be updated. FIG. 2C illustrates an example propagation delay variation 200C during a non-active period of cell DTX / DRX in accordance with aspects of the present disclosure. As shown in FIG. 2C, a reference sign 230 denotes propagation delay variation in cell DTX, and a reference sign 240 denotes propagation delay variation in cell DRX. With reference to FIG. 2C, for cell DTX, a first timing offset to celldtx-onDurationTimer may be needed before a non-active period 231 and a second timing offset to celldtx-onDurationTimer may be needed after the non-active period 231. For cell DRX, a first timing offset to celldrx-onDurationTimer may be needed before a non-active period 241 and a second timing offset to celldrx-onDurationTimer may be needed after the non-active period 241. Thus, it is to be studied how to determine or update the timing offset to address the cell DTX / DRX timing misalignment considering satellite (and UE) movement.
[0077] As known, cell barring mechanisms are introduced for NTN and NES separately. FIG. 2D illustrates example cell barring logics 200D for NTN and NES in accordance with aspects of the present disclosure. As shown in FIG. 2D, in a cell barring logic 250 for NTN, NTN capable UE may ignore an indication “cellBarred” in a master information block (MIB) and directly check an indication “cellBarredNTN” in system information block 1 (SIB1) . If cellBarredNTN is absent in SIB1, UE may consider that a concerned cell is a TN cell and then check the indication “cellBarred” in MIB. If cellBarred is configured as barred, UE may consider that the concerned cell is barred. If cellBarred is configured as not barred, UE may consider that the concerned cell is not barred. If cellBarredNTN is present in SIB1, UE may consider that a concerned cell is an NTN cell. If cellBarredNTN is configured as barred, UE may consider that the concerned cell is barred. If cellBarredNTN is configured as not barred, UE may consider that the concerned cell is not barred.
[0078] Continuing to refer to FIG. 2D, in a cell barring logic 260 for NES, UE may first check an indication “cellBarred” in MIB. If cellBarred in MIB is configured as barred, UE may check an indication “cellbarredNES” in SIB1. If cellBarredNES is configured, UE may consider that a concerned cell is not barred. If cellbarredNES is absent in SIB1, UE may consider that the concerned cell is barred. If cellBarred in MIB is configured as not barred, UE may consider that a concerned cell is not barred.
[0079] If NES is applied in NTN, a cell barring mechanism shall apply for a UE capable of both NES and NTN. However, the above cell barring logics do not consider possibility of combination for NES and NTN. As a result, there will be a conflict, e.g., NTN-capable UE shall ignore cellBarred in MIB while NES-capable UE shall check cellBarred in MIB. Moreover, a condition whether UE capable of both NES and NTN shall consider an NTN cell as barred or not needs to be specified.
[0080] In NTN, an NTN-specific UE reporting mechanism may be introduced to guarantee synchronization, connection or mobility. The NTN-specific UE reporting mechanism may comprise at least one of the following: a TA report to assist network in following uplink scheduling; a PDD report to assist network in configuring SSB measurement timing configuration (SMTC) windows; a location-based measurement report to assist RRC_CONNECTED mobility other than signal strength / quality; a time-based measurement report to assist RRC_CONNECTED mobility other than signal strength / quality; a GNSS position fix duration report to assist network in determining GNSS measurement gap length for UE; or a GNSS validity duration report to assist network in determining GNSS measurement gap start for UE.
[0081] Each of the above reports may be designed with corresponding triggering conditions at UE, and gNB may not know exact time when a report will be triggered. When one of the above reports is triggered during a non-active period of cell DRX / DTX, how to handle the triggered report needs to be specified (e.g., whether UE waits for available resource after the non-active period, or UE triggers SR or RACH as an exceptional case for the report) .
[0082] For example, when cell DRX is configured and activated for a concerned cell, UE may not transmit the above reports on CG resources or may transmit an SR to request a resource for the above report during a non-active period of cell DRX. In another example, when cell DTX is configured and activated for a concerned cell, the UE may not monitor PDCCH or SPS occasions for possible dynamic grant for the above reports during a non-active period of cell DTX. In still another example, when non-active periods of cell DRX and DTX overlap with each other, UE may neither monitor PDCCH for dynamic grant nor use a CG or trigger SR for the above reports.
[0083] Furthermore, if one of the above reports is triggered but UE needs to wait for the next available resource, the corresponding triggering condition may still be fulfilled or not upon the timing of the next available resource. It is unclear whether UE shall continue, discard or update the content of the report.
[0084] In view of the above, embodiments of the present disclosure provide a solution of NES in NTN. In the solution, an NES configuration for an NTN cell is configured and an operation involving cell DTX / DRX and / or cell barring for the NTN cell is performed based on the NES configuration. The solution will be described in details with reference to FIGs. 3 to 4C.
[0085] FIG. 3 illustrates an example of a process 300 that supports NES in NTN in accordance with aspects of the present disclosure. For the purpose of discussion, the process 300 will be described with reference to FIG. 1. The process 300 may involve the UE 104 and the network entity 102 (e.g., the network entity 102-3) as illustrated in FIG. 1. It is to be understood that the steps and the order of the steps in FIG. 3 are merely for illustration, and not for limitation.
[0086] As shown in FIG. 3, the network entity 102 may generate and transmit 310, to the UE 104, an NES configuration (i.e., first configuration) for an NTN cell. In some embodiments, the network entity 102 may generate and transmit 311, to the UE 104, an NTN configuration (i.e., second configuration) for a cell. The NTN configuration may indicate whether the cell is an NTN cell or not.
[0087] In some embodiments, the NTN configuration may comprise information (for convenience, also referred to as second information herein) that the cell is barred or not barred for NTN. In some embodiments, the second information may comprise an indication (e.g., cellBarred) in MIB that indicates whether the cell is barred or not barred for TN and another indication (e.g., cellBarredNTN) in SIB1 that indicates whether the cell is barred or not barred for NTN. In some embodiments, if cellBarredNTN is absent in SIB1, the UE 104 may consider that the cell is a TN cell. If cellBarredNTN is present in SIB1, the UE 104 may consider that the cell is an NTN cell.
[0088] Additionally, if cellBarredNTN is configured as barred, the UE 104 may consider that the cell is barred for NTN. If cellBarredNTN is configured as not barred, the UE 104 may consider that the cell is not barred for NTN. This may facilitate determination of a cell barring status for a cell.
[0089] With reference to FIG. 3, the network entity 102 may generate and transmit 312, to the UE 104, an NES configuration for the cell. In some embodiments, the NES configuration may indicate a cell DTX or DRX for the cell. In some embodiments, the NES configuration may indicate information of cell barring for the cell. It is to be understood that the NES configuration may indicate any other suitable NES techniques and / or any combination of these NES techniques.
[0090] It is also to be understood that the NTN and NES configurations for the cell may be configured in a single configuration or in separate configurations, and the present disclosure does not limit this aspect.
[0091] Based on an NES configuration for an NTN cell, the UE 104 may perform an operation of NES for the NTN cell. With reference to FIG. 3, in some embodiments where the NES configuration indicates the cell DTX or DRX for the NTN cell and the cell DTX or DRX configuration is activated, the UE 104 may control 320 an active period of the cell DTX or DRX based on a time offset.
[0092] As shown in FIG. 3, in some embodiments, the UE 104 may receive 321 an indication of the time offset from the network entity 102. In other words, a value of the time offset may be indicated via a dedicated signaling. In some embodiments, the indication of the time offset may be comprised in the NES configuration. In some embodiments, the indication of the time offset may be delivered separately from the NES configuration.
[0093] As shown in FIG. 3, in some embodiments, the UE 104 may determine 322 the time offset based on at least one of the following: an STT between the UE 104 and the network entity 102; an RTT between the UE 104 and the network entity 102; a TA value applied by the UE 104; a TA value reported by the UE 104; or a configured time offset. The configured time offset may refer to a configured offset that needs to be larger than or equal to an RTT between a reference point (RP) and gNB, and the configured time offset may be denoted as kmac herein. In some embodiments, the UE 104 may determine the time offset based on the latest available UE-gNB STT. In some embodiments, the UE 104 may determine, as the time offset, half of RTT applied to hybrid automatic repeated request (HARQ) RTT timers or a random access response (RAR) window. In some embodiments, the UE 104 may determine, as the time offset, half of a sum of UE’s latest applied TA plus the latest available kmac. In some embodiments, the UE 104 may determine, as the time offset, half of a sum of UE’s latest reported TA plus kmac applied upon a TA report. It is to be understood that these are merely examples and any other suitable ways may also be feasible.
[0094] In some embodiments, the UE 104 may update the time offset after experiencing a non-active period of cell DTX or cell DRX. In some embodiments, if at least one TAC is received during the non-active period of cell DTX or cell DRX, the UE 104 may update the time offset. In some embodiments, if satellite ephemeris is updated during the non-active period of cell DTX or cell DRX, the UE 104 may update the time offset. In some embodiments, if an NTN-specific SIB is reacquired during the non-active period of cell DTX or cell DRX, the UE 104 may update the time offset. In some embodiments, if a position of the user equipment is updated during the non-active period of cell DTX or cell DRX, the UE 104 may update the time offset.
[0095] Continuing to refer to FIG. 3, based on the time offset, the UE 104 may control 323 the active period of the cell DTX or DRX. In some embodiments, the UE 104 may control the active period by controlling a first timer (e.g., celldtx-onDurationTimer) that controls cell DTX (i.e., control the active period of cell DTX) or a second timer (e.g., celldrx-onDurationTimer) that controls cell DRX (i.e., control the active period of cell DRX) .
[0096] In some embodiments, the UE 104 may apply the time offset to a start of the active period. In some embodiments, the UE 104 may delay the start of the active period of the DTX by the time offset. For example, a positive time offset may be applied to the start of the first timer for cell DTX. In some embodiments, the UE 104 may advance the start of the active period of the DRX by the time offset. For example, a negative time offset may be applied to the start of the second timer for cell DRX.
[0097] In some embodiments, the UE 104 may extend the active period with the time offset. In some embodiments, the UE 104 may extend a length of the first timer for cell DTX by applying the time offset to an end of the first timer. In some embodiments, the UE 104 may extend a length of the second timer for cell DRX by applying the time offset to a start of the second timer. In some embodiments, the UE 104 may start the first timer with a length determined by a configured value for the first timer plus the time offset (e.g., at the end of the first timer) . In some embodiments, the UE 104 may start the second timer with a length determined by a configured value for the second timer plus the time offset (e.g., at the start of the second timer) .
[0098] In some embodiments, if a first timing corresponding to the start of the active period upon applying of the time offset has passed, the UE 104 may determine a length of the active period by excluding a time duration between the first timing and a second timing of applying the time offset. In other words, if an offsetted start of celldtx-onDurationTimer / celldrx-onDurationTimer has passed when the UE 104 receives the cell DTX / DRX configuration or activation signaling, the UE 104 may immediately start celldtx-onDurationTimer / celldrx-onDurationTimer with the length excluding the time duration between the offsetted start and the time of receiving the cell DTX / DRX configuration or activation signaling.
[0099] Continuing to refer to FIG. 3, in some embodiments, the UE 104 may determine 324 that a report from the UE 104 to the network entity 102 is triggered during the non-active period of cell DTX or DRX. In some embodiments, the report may be an NTN-specific UE report. In some embodiments, the report may comprise at least one of the following: a TA report; a PDD report; a location-based measurement report; a time-based measurement report; a GNSS position fix duration report; or a GNSS validity duration report. It is to be understood that any other suitable UE reports may also be feasible, and the present disclosure does not limit this aspect.
[0100] Continuing to refer to FIG. 3, if the report is triggered during the non-active period of cell DTX or DRX and no CG resources are available for the report, the UE 104 may perform 325 an operation to handle the report.
[0101] In some embodiments, if the report is triggered during the non-active period of cell DTX or DRX and no CG resources are available for the report, the UE 104 may wait for a CG resource available for the report after the non-active period of cell DTX or DRX.
[0102] In some embodiments, if the report is triggered during the non-active period of cell DTX or DRX and no CG resources are available for the report, the UE 104 may transmit an SR to the network entity 102. For example, the UE 104 may transmit the SR if the report is a predefined case or an exceptional case. In another example, the UE 104 may transmit the SR if a channel associated with the report is a predefined channel or an exceptional channel.
[0103] In some embodiments, if the report is triggered during the non-active period of cell DTX or DRX and no CG resources are available for the report, the UE 104 may initiate a random access procedure. For example, the UE 104 may initial the random access procedure for the report if the report is a predefined case or an exceptional case. In another example, the UE 104 may initial the random access procedure for the report if a channel associated with the report is a predefined channel or an exceptional channel.
[0104] In some embodiments, if a condition triggering the report is unfulfilled upon an uplink resource is available for the report, the UE 104 may discard the report. In some embodiments, if the condition is no longer fulfilled at the first available resource, the UE 104 may discard originally-generated contents in the report. In some embodiments, the UE 104 may preferably discard the TA report, the PDD report, the location-based measurement report or the time-based measurement report.
[0105] In some embodiments, if the condition is no longer fulfilled at the first available resource, the UE 104 may report the originally-generated contents. In some embodiments, the UE 104 may preferably report the GNSS position fix duration report or the GNSS validity duration report.
[0106] In some embodiments, if the condition triggering the report is fulfilled upon an uplink resource is available for the report, the UE 104 may resume the report. In some embodiments, if the condition triggering the report is not fulfilled upon the uplink resource is available for the report, the UE 104 may resume the report.
[0107] In some embodiments, if the condition triggering the report is fulfilled upon an uplink resource is available for the report, the UE 104 may update the report. In some embodiments, if the condition triggering the report is not fulfilled upon the uplink resource is available for the report, the UE 104 may update the report. In some embodiments, the UE 104 may update the report with the latest available contents.
[0108] In some embodiments, if the condition triggering the report is fulfilled upon an uplink resource is available for the report, the UE 104 may report a time stamp indicating when the report is triggered. In some embodiments, if the condition triggering the report is not fulfilled upon the uplink resource is available for the report, the UE 104 may report a time stamp indicating when the report is triggered.
[0109] It is to be understood that any combination of the above handlings of the report may also be feasible. In some embodiments, when an NTN-specific UE report is triggered during a non-active period of cell DRX and no CG resources can be used for the triggered report, the UE 104 may wait for a CG resource available for the report after the non-active period; or transmit an SR to the network entity 102; or initiate a random access procedure.
[0110] In some embodiments, when an NTN-specific UE report is triggered during a non-active period of cell DTX and no CG resources can be used for the triggered report, the UE 104 may wait for a CG resource available for the report after the non-active period; or initiate a random access procedure.
[0111] In some embodiments, when an NTN-specific UE report is triggered during non-active periods of cell DRX and cell DTX that overlap with each other and no CG resources can be used for the triggered report, the UE 104 may directly initiate a random access procedure.
[0112] In some embodiments, if the condition triggered the report is no longer fulfilled at the first available resource, the UE 104 may either discard the originally-generated content in the report or reports the originally-generated content (with an optional time stamp) . Alternatively, the UE 104 may trigger a new report. The UE 104 may additionally report the originally-generated content (with an optional time stamp) along with the new report.
[0113] Continuing to refer to FIG. 3, in some embodiments where the NES configuration indicates the information of cell barring for the NTN cell, the UE 104 may determine 330 a status of cell barring for the NTN cell.
[0114] In some embodiments, the information of cell barring for the NTN cell may comprise information (for convenience, also referred to as first information herein) that the NTN cell is barred or not barred for NES. In some embodiments, the first information may comprise an indication (e.g., cellBarred) in MIB that indicates whether the cell is barred or not barred for TN and another indication (e.g., cellBarredNES) in SIB1 that indicates whether the cell is barred or not barred for NES. In some embodiments, the UE 104 may determine the status of cell barring for the NTN cell based on the first information indicated in the NES configuration and the second information indicated in the NTN configuration.
[0115] In some embodiments, if the NTN cell is barred for NES or NTN, the UE 104 may determine that the NTN cell is barred. If the NTN cell is not barred for NES and the NTN cell is not barred for NTN, the UE 104 may determine that the NTN cell is not barred. In other words, for whether an NTN cell is barred for UE capable of NTN and NES, the NTN cell is not barred when the “not barred” conditions for both NTN and NES are fulfilled. Otherwise, the NTN cell is barred to the UE.
[0116] In some embodiments, if the NTN cell is not barred for NES, the UE 104 may determine whether the NTN cell is not barred for NTN. If the NTN cell is barred for NTN, the UE 104 may determine that the NTN cell is barred for both NTN and NES. If the NTN cell is not barred for NTN, the UE 104 may determine that the NTN cell is not barred for both NTN and NES. That is, an NES cell barring logic may be applied first, and then an NTN cell barring logic may be applied. For illustration, an example will be described in connection with FIG. 4A.
[0117] FIG. 4A illustrates an example cell barring 400A considering both NES and NTN in accordance with aspects of the present disclosure. As shown in FIG. 4A, the UE 104 may first check an indication “cellBarred” in MIB. If cellBarred in MIB is configured as barred, UE may check an indication “cellbarredNES” in SIB1. If cellBarredNES is configured, UE may consider that a concerned cell is not barred for NES and then an NTN cell barring logic may be applied. If cellbarredNES is absent in SIB1, the UE 104 may consider that the concerned cell is barred for both NTN and NES. If cellBarred in MIB is configured as not barred, the UE 104 may consider that a concerned cell is not barred for NES and then an NTN cell barring logic (e.g., the NTN cell barring logic 250 as described in FIG. 2D) may be applied.
[0118] That is, an NES cell barring logic is applied first (UE first checks cellBarred in MIB) . If cellBarred in MIB is not barred or if cellBarred in MIB is barred but cellbarredNES in SIB1 is not barred, an NTN cell barring logic may be applied.
[0119] In some embodiments, if the NTN cell is not barred for NTN, the UE 104 may determine whether the NTN cell is not barred for NES. If the NTN cell is barred for NES, the UE 104 may determine that the NTN cell is barred for both NTN and NES. If the NTN cell is not barred for NES, the UE 104 may determine that the NTN cell is not barred for both NTN and NES. That is, an NTN cell barring logic may be applied first, and then an NES cell barring logic may be applied. For illustration, an example will be described in connection with FIG. 4B.
[0120] FIG. 4B illustrates another example cell barring 400B considering both NES and NTN in accordance with aspects of the present disclosure. As shown in FIG. 4B, the UE 104 may ignore an indication “cellBarred” in an MIB and directly check an indication “cellBarredNTN” in SIB1. If cellBarredNTN is absent in SIB1, the UE 104 may consider that a concerned cell is a TN cell and then an NES cell barring logic may be applied. If cellBarredNTN is present in SIB1, the UE 104 may consider that the concerned cell is an NTN cell. If cellBarredNTN is configured as barred, the UE 104 may consider that the concerned cell is barred for NES and NTN. If cellBarredNTN is configured as not barred, the UE 104 may consider that the concerned cell is not barred and then the NES cell barring logic (e.g., the NES cell barring logic 260 as described in FIG. 2D) may be applied.
[0121] That is, an NTN cell barring logic is applied first (UE first checks cellBarredNTN in SIB1) . If cellBarredNTN in SIB1 is not barred or absent, cellBarred in MIB is not ignored, and an NTN cell barring logic may be applied.
[0122] In some embodiments, the information of cell barring for the NTN cell may comprise information (for convenience, also referred to as third information herein) that the NTN cell is barred or not barred for both NES and NTN. In some embodiments, the UE 104 may determine the status of cell barring for the NTN cell based on the third information. In other words, a new cell barring indication (e.g., cellBarredNTNNES) for both NTN and NES may be introduced, and UE capable of NTN and NES may only check this indication cellBarredNTNNES. For illustration, an example will be described in connection with FIG. 4C.
[0123] FIG. 4C illustrates still another example cell barring 400C considering both NES and NTN in accordance with aspects of the present disclosure. As shown in FIG. 4C, the UE 104 may check an indication “cellBarredNTNNES” in SIB1. If cellBarredNTNNES in SIB1 is configured as barred, the UE 104 may consider that a concerned cell is barred for NES and NTN. If cellBarredNTNNES in SIB1 is configured as not barred, the UE 104 may consider that the concerned cell is not barred for NES and NTN.
[0124] So far, a solution for NES in NTN is described. With the process 300, NES in NTN may be supported and an NTN cell may be allowed to use NES techniques with coordination and enhancement at UE side.
[0125] FIG. 5 illustrates an example of a device 500 that supports NES in NTN in accordance with aspects of the present disclosure. The device 500 may be an example of the UE 104 as described herein. The device 500 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 500 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 502, a memory 504, a transceiver 506, and, optionally, an I / O controller 508. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0126] The processor 502, the memory 504, the transceiver 506, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 502, the memory 504, the transceiver 506, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0127] In some implementations, the processor 502, the memory 504, the transceiver 506, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 502 and the memory 504 coupled with the processor 502 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 502, instructions stored in the memory 504) .
[0128] For example, the processor 502 may support wireless communication at the device 500 in accordance with examples as disclosed herein. In some embodiments where the device 500 is implemented as the UE 104, the processor 502 may be configured to operable to support a means for receiving, from the network entity 102, a first configuration for NES for an NTN cell; and performing, based on the first configuration, an operation comprising at least one of the following: controlling, based on a time offset, an active period of a DTX or DRX from the NTN cell; or determining a status of cell barring for the NTN cell. In some embodiments where the device 500 is implemented as the network entity 102, the processor 502 may be configured to operable to support a means for generating a first configuration for NES for an NTN cell; and transmitting the first configuration to the UE 104, the first configuration being used for at least one of the following: control of an active period of a DTX or DRX from the NTN cell based on a time offset; or determination of a status of cell barring for the NTN cell.
[0129] The processor 502 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 502 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 502. The processor 502 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 504) to cause the device 500 to perform various functions of the present disclosure.
[0130] The memory 504 may include random access memory (RAM) and read-only memory (ROM) . The memory 504 may store computer-readable, computer-executable code including instructions that, when executed by the processor 502 cause the device 500 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 502 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 504 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0131] The I / O controller 508 may manage input and output signals for the device 500. The I / O controller 508 may also manage peripherals not integrated into the device 500. In some implementations, the I / O controller 508 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 508 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 508 may be implemented as part of a processor, such as the processor 506. In some implementations, a user may interact with the device 500 via the I / O controller 508 or via hardware components controlled by the I / O controller 508.
[0132] In some implementations, the device 500 may include a single antenna 510. However, in some other implementations, the device 500 may have more than one antenna 510 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 506 may communicate bi-directionally, via the one or more antennas 510, wired, or wireless links as described herein. For example, the transceiver 506 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 506 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 510 for transmission, and to demodulate packets received from the one or more antennas 510. The transceiver 506 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0133] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 510 for transmitting the amplified signal into the air or wireless medium.
[0134] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 510 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0135] FIG. 6 illustrates an example of a processor 600 that supports handling of overlap among at least SDT procedures in accordance with aspects of the present disclosure. The processor 600 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 600 may include a controller 602 configured to perform various operations in accordance with examples as described herein. The processor 600 may optionally include at least one memory 604, such as L1 / L2 / L3 cache. Additionally, or alternatively, the processor 600 may optionally include one or more arithmetic-logic units (ALUs) 606. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0136] The processor 600 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 600) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0137] The controller 602 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. For example, the controller 602 may operate as a control unit of the processor 600, generating control signals that manage the operation of various components of the processor 600. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0138] The controller 602 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 604 and determine subsequent instruction (s) to be executed to cause the processor 600 to support various operations in accordance with examples as described herein. The controller 602 may be configured to track memory address of instructions associated with the memory 604. The controller 602 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 602 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 602 may be configured to manage flow of data within the processor 600. The controller 602 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 600.
[0139] The memory 604 may include one or more caches (e.g., memory local to or included in the processor 600 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 604 may reside within or on a processor chipset (e.g., local to the processor 600) . In some other implementations, the memory 604 may reside external to the processor chipset (e.g., remote to the processor 600) .
[0140] The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 600, cause the processor 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 602 and / or the processor 600 may be configured to execute computer-readable instructions stored in the memory 604 to cause the processor 600 to perform various functions. For example, the processor 600 and / or the controller 602 may be coupled with or to the memory 604, and the processor 600, the controller 602, and the memory 604 may be configured to perform various functions described herein. In some examples, the processor 600 may include multiple processors and the memory 604 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0141] The one or more ALUs 606 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 606 may reside within or on a processor chipset (e.g., the processor 600) . In some other implementations, the one or more ALUs 606 may reside external to the processor chipset (e.g., the processor 600) . One or more ALUs 606 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 606 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 606 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 606 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 606 to handle conditional operations, comparisons, and bitwise operations.
[0142] The processor 600 may support wireless communication in accordance with examples as disclosed herein. In some embodiments where the processor 600 is implemented at the UE 104, the processor 600 may be configured to operable to support a means for receiving, from the network entity 102, a first configuration for NES for an NTN cell; and performing, based on the first configuration, an operation comprising at least one of the following: controlling, based on a time offset, an active period of a DTX or DRX from the NTN cell; or determining a status of cell barring for the NTN cell. In some embodiments where the processor 600 is implemented at the network entity 102, the processor 600 may be configured to operable to support a means for generating a first configuration for NES for an NTN cell; and transmitting the first configuration to the UE 104, the first configuration being used for at least one of the following: control of an active period of a DTX or DRX from the NTN cell based on a time offset; or determination of a status of cell barring for the NTN cell.
[0143] FIG. 7 illustrates a flowchart of a method 700 that supports NES in NTN in accordance with aspects of the present disclosure. The operations of the method 700 may be implemented by a device or its components as described herein. For example, the operations of the method 700 may be performed by the UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0144] At block 710, the method 700 may include receiving, from the network entity 102, a first configuration for NES for an NTN cell. The operations of 710 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 710 may be performed by a device as described with reference to FIG. 1.
[0145] At block 720, the method 700 may include performing, based on the first configuration, an operation comprising at least one of the following: controlling, based on a time offset, an active period of a DTX or DRX from the NTN cell; or determining a status of cell barring for the NTN cell. The operations of 720 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 720 may be performed by a device as described with reference to FIG. 1.
[0146] In some embodiments, the first configuration may indicate the DTX or DRX. In some embodiments, the method 700 may further comprise determining the time offset by at least one of the following: receiving an indication of the time offset from the base station via the transceiver; or determining the time offset based on at least one of the following: an STT between the UE 104 and the network entity 102; an RTT between the UE 104 and the network entity 102; a TA value applied by the UE 104; a TA value reported by the UE 104; or a configured time offset.
[0147] In some embodiments, the method 700 may further comprise updating the time offset based on at least one of the following: at least one TAC is received during a non-active period of the DTX or DRX; satellite ephemeris is updated during the non-active period; a NTN-specific SIB is reacquired during the non-active period; or a position of the user equipment is updated during the non-active period.
[0148] In some embodiments, controlling the active period may comprise at least one of the following: applying the time offset to a start of the active period; or extending the active period with the time offset. In some embodiments, applying the time offset may comprise at least one of the following: delaying the start of the active period of the DTX by the time offset; or advancing the start of the active period of the DRX by the time offset. In some embodiments, extending the active period may comprise at least one of the following: extending a length of a first timer that controls the DTX by applying the time offset to an end of the first timer; extending a length of a second timer that controls the DRX by applying the time offset to a start of the second timer; starting the first timer with a length determined by a configured value for the first timer plus the time offset; or starting the second timer with a length determined by a configured value for the second timer plus the time offset.
[0149] In some embodiments, the method 700 may further comprise: in accordance with a determination that a first timing corresponding to the start of the active period upon applying of the time offset has passed, determining a length of the active period by excluding a time duration between the first timing and a second timing of applying the time offset.
[0150] In some embodiments, the first configuration may comprise first information that the NTN cell is barred or not barred for NES. In some embodiments, the method 700 may further comprise: receiving, from the network entity 102, a second configuration for NTN comprising second information that the NTN cell is barred or not barred for NTN. In some embodiments, determining the status of cell barring for the NTN cell may comprise: determining the status of cell barring for the NTN cell based on the first information and the second information.
[0151] In some embodiments, determining the status of cell barring for the NTN cell based on the first information and the second information may comprise: in accordance with a determination that the NTN cell is barred for NES or NTN, determining that the NTN cell is barred; and in accordance with a determination that the NTN cell is not barred for NES and the NTN cell is not barred for NTN, determining that the NTN cell is not barred.
[0152] In some embodiments, determining the status of cell barring for the NTN cell based on the first information and the second information may comprise: in accordance with a determination that the NTN cell is not barred for NES, determining whether the NTN cell is not barred for NTN; in accordance with a determination that the NTN cell is barred for NTN, determining that the NTN cell is barred for both NTN and NES; and in accordance with a determination that the NTN cell is not barred for NTN, determining that the NTN cell is not barred for both NTN and NES.
[0153] In some embodiments, determining the status of cell barring for the NTN cell based on the first information and the second information may comprise: in accordance with a determination that the NTN cell is not barred for NTN, determining whether the NTN cell is not barred for NES; in accordance with a determination that the NTN cell is barred for NES, determining that the NTN cell is barred for both NTN and NES; and in accordance with a determination that the NTN cell is not barred for NES, determining that the NTN cell is not barred for both NTN and NES.
[0154] In some embodiments, the first configuration may comprise third information that the NTN cell is barred or not barred for both NES and NTN. In some embodiments, determining the status of cell barring for the NTN cell may comprise: determining the status of cell barring for the NTN cell based on the third information.
[0155] In some embodiments, the method 700 may further comprise: in accordance with a determination that a report from the user equipment to the base station is triggered during a non-active period of the DTX or DRX and that no CG resources are available for the report, performing an operation comprising at least one of the following: waiting for a CG resource available for the report after the non-active period; transmitting a scheduling request to the network entity 102; or initiating a random access procedure.
[0156] In some embodiments, the report may comprise at least one of the following: a TA report; a PDD report; a location-based measurement report; a time-based measurement report; a GNSS position fix duration report; or a GNSS validity duration report.
[0157] In some embodiments, the method 700 may further comprise at least one of the following: in accordance with a determination that a condition triggering the report is unfulfilled upon an uplink resource is available for the report, discarding the report; in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, resuming the report; in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, updating the report; or in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, reporting a time stamp indicating when the report is triggered.
[0158] FIG. 8 illustrates a flowchart of another method 800 that supports NES in NTN in accordance with aspects of the present disclosure. The operations of the method 800 may be implemented by a device or its components as described herein. For example, the operations of the method 800 may be performed by the network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0159] At block 810, the method 800 may include generating a first configuration for NES for an NTN cell. The operations of 810 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 810 may be performed by a device as described with reference to FIG. 1.
[0160] At block 820, the method 800 may include transmitting the first configuration to the UE 104, the first configuration being used for at least one of the following: control of an active period of a DTX or DRX from the NTN cell based on a time offset; or determination of a status of cell barring for the NTN cell. The operations of 820 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 820 may be performed by a device as described with reference to FIG. 1.
[0161] In some embodiments, the first configuration may indicate the DTX or DRX. In some embodiments, the method 800 may further comprise transmitting an indication of the time offset to the UE 104.
[0162] In some embodiments, the first configuration may comprise third information that the NTN cell is barred or not barred for both NES and NTN.
[0163] In some embodiments, a report from the UE 104 to the network entity 102 is triggered during a non-active period of the DTX or DRX and upon no CG resources are available for the report. In some embodiments, the method 800 may further comprise at least one of the following: receiving, from the UE 104, the report at a CG resource available for the report after the non-active period; receiving, from the UE 104, a scheduling request for the report; or receiving, from the UE 104, a random access request for the report.
[0164] It is to be understood that the operations of the methods 700 and 800 correspond to that described in connection with FIGs. 3 to 4C, and thus other details are not repeated here for conciseness.
[0165] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0166] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0167] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0168] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0169] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0170] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, from a base station via the transceiver, a first configuration for network energy saving (NES) for a non-terrestrial network (NTN) cell; andperform, based on the first configuration, an operation comprising at least one of the following:controlling, based on a time offset, an active period of a discontinuous transmission (DTX) or discontinuous reception (DRX) from the NTN cell; ordetermining a status of cell barring for the NTN cell.2.The user equipment of claim 1, wherein the first configuration indicates the DTX or DRX, and wherein the processor is further configured to determine the time offset by at least one of the following:receiving an indication of the time offset from the base station via the transceiver; ordetermining the time offset based on at least one of the following:a single trip time (STT) between the user equipment and the base station;a round trip time (RTT) between the user equipment and the base station;a timing advance (TA) value applied by the user equipment;a TA value reported by the user equipment; ora configured time offset.3.The user equipment of claim 1, wherein the processor is further configured to update the time offset based on at least one of the following:at least one timing advance command (TAC) is received during a non-active period of the DTX or DRX;satellite ephemeris is updated during the non-active period;a NTN-specific system information block (SIB) is reacquired during the non-active period; ora position of the user equipment is updated during the non-active period.4.The user equipment of claim 1, wherein the processor is configured to control the active period by at least one of the following:applying the time offset to a start of the active period; orextending the active period with the time offset.5.The user equipment of claim 4, wherein the processor is configured to apply the time offset by at least one of the following:delaying the start of the active period of the DTX by the time offset; oradvancing the start of the active period of the DRX by the time offset.6.The user equipment of claim 4, wherein the processor is configured to extend the active period by at least one of the following:extending a length of a first timer that controls the DTX by applying the time offset to an end of the first timer;extending a length of a second timer that controls the DRX by applying the time offset to a start of the second timer;starting the first timer with a length determined by a configured value for the first timer plus the time offset; orstarting the second timer with a length determined by a configured value for the second timer plus the time offset.7.The user equipment of claim 4, wherein the processor is further configured to:in accordance with a determination that a first timing corresponding to the start of the active period upon applying of the time offset has passed, determine a length of the active period by excluding a time duration between the first timing and a second timing of applying the time offset.8.The user equipment of claim 1, wherein the first configuration comprises first information that the NTN cell is barred or not barred for NES,wherein the processor is further configured to: receive, from the base station, a second configuration for NTN comprising second information that the NTN cell is barred or not barred for NTN, andwherein the processor is configured to determine the status of cell barring for the NTN cell by: determining the status of cell barring for the NTN cell based on the first information and the second information.9.The user equipment of claim 8, wherein the processor is configured to determine the status of cell barring for the NTN cell based on the first information and the second information by:in accordance with a determination that the NTN cell is barred for NES or NTN, determining that the NTN cell is barred; andin accordance with a determination that the NTN cell is not barred for NES and the NTN cell is not barred for NTN, determining that the NTN cell is not barred.10.The user equipment of claim 8, wherein the processor is configured to determine the status of cell barring for the NTN cell based on the first information and the second information by:in accordance with a determination that the NTN cell is not barred for NES, determining whether the NTN cell is not barred for NTN;in accordance with a determination that the NTN cell is barred for NTN, determining that the NTN cell is barred for both NTN and NES; andin accordance with a determination that the NTN cell is not barred for NTN, determining that the NTN cell is not barred for both NTN and NES.11.The user equipment of claim 8, wherein the processor is configured to determine the status of cell barring for the NTN cell based on the first information and the second information by:in accordance with a determination that the NTN cell is not barred for NTN, determining whether the NTN cell is not barred for NES;in accordance with a determination that the NTN cell is barred for NES, determining that the NTN cell is barred for both NTN and NES; andin accordance with a determination that the NTN cell is not barred for NES, determining that the NTN cell is not barred for both NTN and NES.12.The user equipment of claim 1, wherein the first configuration comprises third information that the NTN cell is barred or not barred for both NES and NTN, and wherein the processor is configured to determine the status of cell barring for the NTN cell by:determining the status of cell barring for the NTN cell based on the third information.13.The user equipment of claim 1, wherein the processor is further configured to:in accordance with a determination that a report from the user equipment to the base station is triggered during a non-active period of the DTX or DRX and that no configured grant (CG) resources are available for the report, perform an operation comprising at least one of the following:waiting for a CG resource available for the report after the non-active period;transmitting a scheduling request to the base station via the transceiver; orinitiating a random access procedure.14.The user equipment of claim 13, wherein the report comprises at least one of the following:a timing advance (TA) report;a propagation delay difference (PDD) report;a location-based measurement report;a time-based measurement report;a global navigation satellite system (GNSS) position fix duration report; ora GNSS validity duration report.15.The user equipment of claim 13, wherein the processor is further configured to at least one of the following:in accordance with a determination that a condition triggering the report is unfulfilled upon an uplink resource is available for the report, discard the report;in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, resume the report;in accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, update the report; orin accordance with a determination that the condition triggering the report is fulfilled or unfulfilled upon the uplink resource is available for the report, report a time stamp indicating when the report is triggered.16.A base station, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:generate a first configuration for network energy saving (NES) for a non-terrestrial network (NTN) cell; andtransmit the first configuration to a user equipment via the transceiver, the first configuration being used for at least one of the following:control of an active period of a discontinuous transmission (DTX) or discontinuous reception (DRX) from the NTN cell based on a time offset; ordetermination of a status of cell barring for the NTN cell.17.The base station of claim 16, wherein the first configuration indicates the DTX or DRX, and wherein the processor is further configured to:transmit an indication of the time offset to the user equipment via the transceiver.18.The base station of claim 16, wherein the first configuration comprises third information that the NTN cell is barred or not barred for both NES and NTN.19.The base station of claim 16, wherein a report from the user equipment to the base station is triggered during a non-active period of the DTX or DRX and upon no configured grant (CG) resources are available for the report, and wherein the processor is further configured to at least one of the following:receive, from the user equipment via the transceiver, the report at a CG resource available for the report after the non-active period;receive, from the user equipment via the transceiver, a scheduling request for the report; orreceive, from the user equipment via the transceiver, a random access request for the report.20.A processor for wireless communication, comprising:at least one memory; anda controller coupled with the at least one memory and configured to cause the processor to:receive, from a base station, a first configuration for network energy saving (NES) for a non-terrestrial network (NTN) cell; andperform, based on the first configuration, an operation comprising at least one of the following:controlling, based on a time offset, an active period of a discontinuous transmission (DTX) or discontinuous reception (DRX) from the NTN cell; ordetermining a status of cell barring for the NTN cell.