SPS transmission for IoT ntn
The method and apparatus optimize SPS communication in IoT NTN by configuring SPS occasions and managing HARQ feedback, improving communication performance.
Patent Information
- Application Number
- PCT/CN2025/070747
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-11-13
AI Technical Summary
Existing technologies lack an efficient approach to support semi-persistent scheduling (SPS) communication in Internet of Things (IoT) Non-Terrestrial Networks (NTN), particularly regarding Hybrid Automatic Repeat Request (HARQ) feedback mechanisms.
Implementing a method and apparatus that enable semi-persistent scheduling (SPS) configurations for IoT NTN by determining SPS occasions and enabling/disabling HARQ feedback based on specific parameters, including HARQ process identifiers and activation control signals.
Enhances communication performance in IoT NTN by optimizing SPS occasions and HARQ feedback, addressing the inefficiencies in existing systems.
Smart Images

Figure CN2025070747_13112025_PF_FP_ABST
Abstract
Description
SPS TRANSMISSION FOR IOT NTNTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to a semi-persistent scheduling (SPS) transmission for an Internet of things (IoT) 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 device, 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] With the developments of communication technology, more and more communication scenarios may relate to a non-terrestrial network (NTN) . An NTN refers to a network or segments of a network using radio frequency (RF) resources on board a satellite. The satellite in NTN may be a geostationary earth orbiting (GEO) satellite with a fixed location to the earth, or a low earth orbiting (LEO) satellite orbiting around the earth. The third generation partnership project (3GPP) release 17 (Rel-17) specifications have provided basic support for NTN functions. However, enhancements on NTN communication, especially an SPS transmission for an IoT NTN, are still needed.SUMMARY
[0004] The present disclosure relates to a method, an apparatus, and a system that supports an SPS transmission for an IoT NTN. With the apparatus and method, it is allowed to improve the communication performance in the IoT NTN.
[0005] In some implementations, there is provided a user equipment (UE) . The UE comprises at least one memory, and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal; determine a plurality of SPS occasions for receiving data based on the SPS configuration; and receive the data on the plurality of SPS occasions, and wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0006] In some implementations, there is provided a method performed by the UE. The method comprises: receiving a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal; determining a plurality of SPS occasions for receiving data based on the SPS configuration; and receiving the data on the plurality of SPS occasions, and wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0007] In some implementations, there is provided a processor for wireless communication. The processor comprises at least one controller coupled with at least one memory and configured to cause the processor to: receive a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal; determine a plurality of SPS occasions for receiving data based on the SPS configuration; and receive the data on the plurality of SPS occasions, and wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0008] In some implementations of the method and the UE described herein, the plurality of SPS occasions may be determined based on an SPS period and a start time of the data where configured downlink assignment was initialized or re-initialized. In some implementations of the method and the UE described herein, the SPS period may be with a unit of a radio frame or a subframe. In some implementations of the method and the UE described herein, the SPS period may be determined based on a base period set and a scaling factor.
[0009] In some implementations of the method and the UE described herein, a HARQ process identifier (ID) associated with the data may be determined based on the information on whether the HARQ feedback for the data is enabled or disabled.
[0010] In some implementations of the method and the UE described herein, a HARQ Process ID associated with the data may be determined based on at least one of a time slot of the data, an SPS period, a total HARQ process number, or a target number, and the target number may be configured in the SPS configuration. In some implementations of the method and the UE described herein, the data may be associated with a first HARQ process for which HARQ feedback is enabled and a second HARQ process for which HARQ feedback is disabled, and one of the target number of consecutive SPS occasions of the plurality of SPS occasions may be configured for the first HARQ process, and the other one or more SPS occasions of the target number of SPS occasions may be configured for the second HARQ process.
[0011] In some implementations of the method and the UE described herein, the SPS configuration may comprise a bitmap, and a respective bit of the bitmap may indicate whether HARQ feedback for a respective HARQ process associated with the data is enabled or disabled.
[0012] In some implementations of the method and the UE described herein, the SPS configuration may comprise an indication indicating whether enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal.
[0013] Some implementations of the method and the UE described herein may further include validating the activation control signal based on one or more fields of the activation control signal, wherein the one or more fields are determined based on at least one of a total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled. In some implementations of the method and the UE described herein, the one or more fields may comprise at least one of a HARQ process number field and a redundancy version field.
[0014] In some implementations of the method and the UE described herein, the activation control signal may comprise a HARQ feedback resource field, a function of which may be determined based on at least one of the total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled. In some implementations of the method and the UE described herein, one state of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. In some implementations of the method and the UE described herein, the HARQ feedback resource field of the activation control signal may indicate a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled. In some implementations of the method and the UE described herein, the activation control signal may further comprise a HARQ process number field and a redundancy version field, and the HARQ feedback resource field and one of the HARQ process number field or the redundancy version field may jointly indicate a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled.
[0015] In some implementations, there is provided a base station (BS) . The BS comprises at least one memory, and at least one processor coupled with the at least one memory and configured to cause the BS to: transmit a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions; and transmit data on the plurality of SPS occasions, and wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0016] In some implementations, there is provided a method performed by the BS. The method comprises: transmitting a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions; and transmitting data on the plurality of SPS occasions, and wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0017] In some implementations, there is provided a processor for wireless communication. The processor comprises at least one controller coupled with at least one memory and configured to cause the processor to: transmit a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions; and transmit data on the plurality of SPS occasions, and wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0018] In some implementations of the method and the BS described herein, the plurality of SPS occasions may be determined based on an SPS period and a start time of the data where configured downlink assignment was initialized or re-initialized. In some implementations of the method and the BS described herein, the SPS period may be with a unit of a radio frame or a subframe. In some implementations of the method and the BS described herein, the SPS period may be determined based on a base period set and a scaling factor.
[0019] In some implementations of the method and the BS described herein, a HARQ process identifier (ID) associated with the data may be determined based on the information on whether the HARQ feedback for the data is enabled or disabled.
[0020] In some implementations of the method and the BS described herein, a HARQ Process ID associated with the data may be determined based on at least one of a time slot of the data, an SPS period, a total HARQ process number, or a target number, and the target number may be configured in the SPS configuration. In some implementations of the method and the BS described herein, the data may be associated with a first HARQ process for which HARQ feedback is enabled and a second HARQ process for which HARQ feedback is disabled, and one of the target number of consecutive SPS occasions of the plurality of SPS occasions may be configured for the first HARQ process, and the other one or more SPS occasions of the target number of SPS occasions may be configured for the second HARQ process.
[0021] In some implementations of the method and the BS described herein, the SPS configuration may comprise a bitmap, and a respective bit of the bitmap indicates whether HARQ feedback for a respective HARQ process associated with the data is enabled or disabled.
[0022] In some implementations of the method and the BS described herein, the SPS configuration may comprise an indication indicating whether enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal.
[0023] In some implementations of the method and the BS described herein, the activation control signal may be validated based on one or more fields of the activation control signal, wherein the one or more fields are determined based on at least one of a total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled. In some implementations of the method and the BS described herein, the one or more fields may comprise at least one of a HARQ process number field and a redundancy version field.
[0024] In some implementations of the method and the BS described herein, the activation control signal may comprise a HARQ feedback resource field, a function of which may be determined based on at least one of the total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled. In some implementations of the method and the BS described herein, one state of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. In some implementations of the method and the BS described herein, the HARQ feedback resource field of the activation control signal may indicate a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled. In some implementations of the method and the BS described herein, the activation control signal may further comprise a HARQ process number field and a redundancy version field, and the HARQ feedback resource field and one of the HARQ process number field or the redundancy version field may jointly indicate a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled.BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG. 1 illustrates an example of a wireless communications system that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure;
[0026] FIG. 2 illustrates an example process flow in accordance with some example embodiments of the present disclosure;
[0027] FIGS. 3A and 3B illustrate example illustrations of HARQ process ID determination in accordance with some example embodiments of the present disclosure;
[0028] FIG. 4 illustrates an example of a device that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure;
[0029] FIG. 5 illustrates an example of a processor that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure; and
[0030] FIGS. 6 through 7 illustrate flowcharts of methods that support an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure.
[0031] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0032] 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.
[0033] 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 the ordinary skills in the art to which this disclosure belongs.
[0034] 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.
[0035] 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 embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It 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.
[0037] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as 5G new radio (NR) , Long-Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Internet of Things (NB-IoT) , and so on. Further, the communications between a UE and a network device in the communication network may be performed according to any suitable generation communication protocols, including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the 4G, 4.5G, the 5G communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.
[0038] As used herein, the term “network device” or “network entity” generally refers to a node in a communication network via which a UE can access the communication network and receive services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , an infrastructure device for a vehicle-to-everything (V2X) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto a base station (BS) , a pico BS, and so forth, depending on the applied terminology and technology. The network device may further refer to a network function (NF) in the core network, for example, a service management function (SMF) , an access and mobility management function (AMF) , a policy control function (PCF) , a user plane function (UPF) or devices with the same function in future network architectures, and so forth.
[0039] As used herein, the term “user equipment (UE) ” or “terminal device” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a UE may also be referred to as a communication device, a terminal device, an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The UE may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable UE, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture UE such as a digital camera, a gaming UE, a music storage and playback appliance, a vehicle-mounted wireless UE, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, wireless customer-premises equipment (CPE) , an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device (for example, a remote surgery device) , an industrial device (for example, a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms: “UE, ” “communication device, ” “terminal, ” and “UE, ” may be used interchangeably.
[0040] Principles and implementations of embodiments of the present disclosure will be described in detail below with reference to the figures.
[0041] FIG. 1 illustrates an example of a wireless communications system (or referred to as a communication network) 100 that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , 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.
[0042] 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.
[0043] In NTN scenarios, a network entity 102 may be implemented as a satellite. The network entity 102 may have full or part of an eNB / gNB on board. A network entity 102 in the form of a satellite can directly communicate to UE 104 using the NR / LTE Uu interface. The satellite may be a transparent satellite or a regenerative satellite. For NTN with a transparent satellite, a base station on earth may communicate with a UE via the satellite. For example, a communication link 110 between the satellite and the UE 104, a communication link 110 between the satellite and a base station on earth, and a communication link 116 between the base station on earth and core network 106 may be used for the NTN transparent mode. For NTN with a regenerative satellite, the base station may be on board and directly communicate with the UE. For example, a communication link 110 between the satellite and the UE 104, and a communication link 116 between the satellite (with full or part of an eNB / gNB on board) and core network 106 may be used for the NTN regenerative mode.
[0044] A network entity 102 may provide a geographic coverage area 112 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 the geographic coverage area 112. 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 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 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.
[0045] 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.
[0046] 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.
[0047] 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 (SL) . For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0048] 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) .
[0049] 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.
[0050] 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 transmission reception point (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) ) .
[0051] 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.
[0052] 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) .
[0053] 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 .
[0054] 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.
[0055] 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, N3, 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) .
[0056] 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.
[0057] 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.
[0058] 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.
[0059] 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.
[0060] 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.
[0061] 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.
[0062] SPS is a scheduling mechanism used in wireless communication systems, specifically in LTE and 5G networks. SPS is designed to efficiently allocate radio resources (i.e., pre-configured resources on the specified subframes) and reduce signaling overhead for applications that require periodic and predictable transmission, such as voice and video streaming. To improve the communication performance, a HARQ process may be used in the SPS.
[0063] In the LTE SPS resource configuration, after a semi-persistent downlink assignment is configured, the MAC entity may consider sequentially that the Nth assignment occurs in the transmission time interval (TTI) for which: (10 *SFN + subframe) = [ (10 *SFNstart time + subframestart time) + N * semiPersistSchedIntervalDL] modulo 10240, where for bandwidth reduced low complexity (BL) UEs or UEs in enhanced coverage, SFNstart time and subframestart time refer to a system frame number (SFN) and a subframe of the first transmission of a physical downlink shared channel (PDSCH) where configured downlink assignment was (re-) initialized, and semiPersistSchedIntervalDL is configured from a set of {10, 20, 32, 40, 64, 80, 128, 160, 320, 640} ms.
[0064] In the LTE SPS HARQ process ID determination, for configured downlink assignments, the HARQ Process ID associated with the TTI is derived from the following equation: HARQ Process ID = [floor (CURRENT_TTI / semiPersistSchedIntervalDL) ] modulo numberOfConfSPS-Processes, where CURRENT_TTI= [ (SFN *10) + subframe number] , and for BL UEs or UEs in enhanced coverage, CURRENT_TTI refers to the TTI where the first transmission of the repetition bundle takes place.
[0065] Moreover, in the LTE, a UE may validate an SPS physical downlink control channel (PDCCH) based on a cyclic redundancy check (CRC) scrambled by an SPS radio network temporary identifier (SPS-RNTI) and special fields of the corresponding downlink control information DCI (format) (e.g., DCI format 6-1A for an enhanced machine type communication (eMTC) UE) . Validation is achieved if all the special fields for the respective used DCI format are set according to the following Table 1: Table 1: special fields for SPS activation machine type communication (MTC) PDCCH (MPDCCH) validation
[0066] In addition, in the LTE, the HARQ feedback resource (e.g., PUCCH) for the SPS PDSCH is determined by the activation PDCCH. For the case that the DCI format indicates a semi-persistent downlink scheduling activation, the TPC command for the PUCCH field may be used as an index to indicate one of the four PUCCH resource values configured by a higher layer, with a mapping defined in the following Table 2. Table 2: PUCCH resource indication
[0067] Further, the HARQ feedback enabling and disabling technology has been introduced in the IoT NTN. For the narrowband internet-of-things (NBIoT) , one state (e.g., 1111) of a HARQ-ACK resource field (e.g., with 4bits) in the DCI format N1 is used for an indication of HARQ feedback disabled, and other states of the field are used for an indication of HARQ feedback enabled and a corresponding HARQ-ACK resource. If multiple transport blocks (TBs) are configured for the NBIoT, for the DCI-based HARQ enabling / disabling direct indication in the multiple TBs scheduled by a single DCI, the same indication is applied to all scheduled TBs, i.e. HARQ is enabled or disabled for all TBs.
[0068] However, as of now, there is no efficient approach to support the HARQ technology based SPS communication in the IoT NTN. In view of the above, how to support the SPS communication in the IoT NTN considering the HARQ technology efficiently is still an open issue to be solved.
[0069] Embodiments of the present disclosure provide a solution to resolve the above issue that occurred in the IoT NTN, and also in any other types of networks in which a similar issue occurs. In one aspect of the solution of the present disclosure, a UE receives an SPS configuration for an IoT NTN and an activation control signal. The UE further determines a plurality of SPS occasions for receiving data based on the SPS configuration. Moreover, the UE receives the data on the plurality of SPS occasions. Information on whether HARQ feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0070] By allowing information on whether HARQ feedback for the data is enabled or disabled being comprised in at least one of the SPS configuration or the activation control signal, this solution can support the HARQ feedback for SPS based communication in an IoT NTN in an efficient approach. In this way, it is possible to improve the communication performance in the IoT NTN.
[0071] Reference is now made to FIG. 2, which illustrates an example process flow 200 in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1, and the process 200 may involve a UE 104 and a network entity 102 as shown in FIG. 1. The network entity 102 may be implemented as a satellite. It is to be understood that the steps and the order of the steps in FIG. 2 are merely for illustration, and not for limitation. It is to be understood that process 200 may further include additional blocks not shown and / or omit some shown blocks, and the scope of the present disclosure is not limited in this regard.
[0072] As shown in FIG. 2, the network entity 102 transmits (205) , to the UE 104, an SPS configuration for an IoT NTN and an activation control signal (also referred to as an activation PDCCH (such as NBIoT PDCCH (NPDCCH) ) or an activation SPS PDCCH) . The SPS configuration may be transmitted before the activation control signal. The SPS configuration may include one or more parameters for generating multiple SPS occasions for downlink communication between the network entity 102 and the UE 104. Based on the reception of the activation control signal, the UE 104 determines (210) a plurality of SPS occasions for receiving data based on the SPS configuration. The network entity 102 transmits (215) data on the plurality of SPS occasions to the UE 104.
[0073] In some embodiments, the plurality of SPS occasions may be determined based on an SPS period and a start time of a first transmission of the data where configured downlink assignment was initialized or re-initialized. In some example implementations, after a semi-persistent downlink assignment is configured, a MAC entity may consider sequentially that the Nth assignment occurs in the TTI for which: (10 *SFN + subframe) = [ (10 *SFNstart time + subframestart time) + N * semiPersistSchedIntervalDL] modulo 10240, where SFNstart time and subframestart time refer to the SFN and the subframe of the first transmission of the narrowband internet-of-things (NBIoT) physical downlink shared channel (NPDSCH) where the configured downlink assignment was (re-) initialized, semiPersistSchedIntervalDL refers to the SPS period.
[0074] In some embodiments, the SPS period may be configured by a higher layer. However, the long round trip time (RTT) for a GEO system or for an LEO system may have wide ranges (for example, a typical RTT for GEO=500ms; a typical RTT for LEO600km=28ms; a typical RTT for LEO1200km=50ms) . In some implementations, the SPS period may be with a unit of a radio frame or a subframe. In other words, the unit of the parameter “semiPersistSchedIntervalDL” may be a radio frame (i.e., tens of multiple subframes) or a subframe. For example, a set of the SPS periods (also referred to as an interval set) may be {10 15 20 25} radio frames or {160 320 480} subframes for an GEO system. In some other implementations, in order to support different satellite deployments, the SPS period may be determined based on a base period set and a scaling factor. In other words, the interval set may be scaled based on the base period set. As an example, the base period set = {10 20 40 80} (ms) , and scaling factor =20 for a GEO system; or scaling factor =1 for an LEO system, and thus the interval set for the GEO system may be configured by 20x {10 20 40 80} = {200 400 800 1600} (ms) while the interval set for the LEO system may be configured by 1x {10 20 40 80} = {10 20 40 80} .
[0075] In some embodiments, information on whether HARQ feedback for the data is enabled or disabled may be comprised in at least one of the SPS configuration or the activation control signal. In some implementations, the SPS configuration may comprise a bitmap, and a respective bit of the bitmap may indicate whether HARQ feedback for a respective HARQ process associated with the data is enabled or disabled. In this case, the HARQ feedback enabled / disabled configuration may be configured by a higher layer parameter via a bitmap (e.g., with “01” for two HARQ process numbers, i.e., with a value of 0 or 1 of each bit of the bitmap corresponding to each of two HARQ process numbers ) . In some other implementations, the SPS configuration may comprise an indication indicating whether enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal. In this case, the HARQ feedback enabled / disabled indication may then be indicated by the activation control signal. Details of how to configure / indicate the enabling or disabling of the HARQ feedback based on the activation control signal will be discussed in detail later.
[0076] In some embodiments, a HARQ process ID associated with the data may be determined based on the information on whether the HARQ feedback for the data is enabled or disabled. In other words, the HARQ Process ID may be determined by the HARQ feedback enabled / disabled configuration / indication. In some implementations, the HARQ Process ID associated with the data may be determined based on at least one of a time slot of the data (or the first time slot of the data in case of multiple repetition transmissions) , the SPS period, a total HARQ process number, or a target number (for example, M, such as M=4) . The total HARQ process number may be configured by a higher layer. The total HARQ process number may be determined by a parameter of “maximal number of HARQ process” (e.g., 2) . The target number may implicitly indicate the ratio of SPS occasions with different HARQ processes (which may have different HARQ feedback enabling and disabling information) and may be configured in the SPS configuration.
[0077] In the implementations where the HARQ feedback enabled / disabled is not configured, the HARQ Process ID associated with the data may be determined based on at least one of the time slot of the data (or the first time slot of the data in case of multiple repetition transmissions) , the SPS period, or the total HARQ process number. For example, in this case, the HARQ process ID may be determined as follows: HARQ Process ID = [floor (CURRENT_TTI / semiPersistSchedIntervalDL) ] modulo numberOfConfSPS-Processes where CURRENT_TTI= [ (SFN *10) + subframe number] , CURRENT_TTI refers to the TTI where the first transmission of the repetition bundle takes place, semiPersistSchedIntervalDL refers to the SPS period configured by a higher layer, and numberOfConfSPS-Processes refers to the total HARQ process number.
[0078] FIG. 3A illustrates an example illustration of HARQ process ID determination based on the above HARQ process ID determination approach in the case where the HARQ feedback enabled / disabled is not configured. As shown in FIG. 3A, the subframes 1 and 9 are associated with HARQ process ID 0, and the subframes 5 and 13 are associated with HARQ process ID 1, and “HARQ process ID 0” and “HARQ process ID 1” are in turns in consecutive SPS occasions.
[0079] In the implementations where the HARQ feedback enabled / disabled is configured (for example, for two HARQ processes, one HARQ process is configured / indicated as HARQ feedback enabled while the other HARQ process is configured / indicated as HARQ feedback disabled by a bitmap indication set as “01” or “10” ) , the HARQ Process ID associated with the data may be determined based on at least one of the time slot of the data, the SPS period, the total HARQ process number, or the target number (i.e., the configured M, e.g., M=4) . For example, in this case, the HARQ Process ID may be determined as follows:
[0080] IF [floor (CURRENT_TTI / semiPersistSchedIntervalDL) ] modulo M = 0
[0081] HARQ Process ID = 0 (HARQ feedback enabled process) ;
[0082] Else
[0083] HARQ Process ID = 1 (HARQ feedback disabled process) .
[0084] Based on the above HARQ process ID determination approach, in a case where a first HARQ process (e.g., with HARQ process ID 0) is configured with HARQ feedback enabled and a second HARQ process (e.g., with HARQ process ID 1) is configured with HARQ feedback disabled, one of the target number of consecutive SPS occasions (i.e., M SPS occasions) of the plurality of SPS occasions may be configured for the first HARQ process, and the other one or more SPS occasions of the target number of SPS occasions may be configured for the second HARQ process. In other words, within M SPS occasions, only one SPS occasion may be configured as HARQ feedback enabled for channel adaptation, and the other M-1 SPS occasions may be configured as HARQ feedback disabled.
[0085] FIG. 3B illustrates an example illustration of HARQ process ID determination based on the above HARQ process ID determination approach in the case where the HARQ feedback enabled / disabled is configured. As shown in FIG. 3B, the subframes 1 and 17 are associated with HARQ process ID 0 with HARQ feedback enabled, and the subframes 5, 9, 13, 21, 25, and 29 are associated with HARQ process ID 1 with HARQ feedback disabled.
[0086] In some embodiments, a scheduling restriction may be that the interval of the two-assignment resources (e.g., SPS occasions) with the same HARQ process ID may be larger than the propagation legacy or transmission RTT (e.g., >500ms for the GEO system) , as shown in FIGS. 3A and 3B. In this way, it is allowed to avoid potential collisions caused by the transmissions with the same HARQ process ID. In FIG. 3B, the interval of the SPS occasions for the HARQ process number with HARQ feedback enabled (e.g., HARQ process ID 0) should be larger than the transmission RTT.
[0087] In some embodiments, to distinguish the activation control signal from a legacy control signal, the UE 104 may validate the activation control signal based on one or more fields (also referred to as one or more special fields) of the activation control signal (for example, one or more special fields of the respective used DCI format) . The validation may be achieved if all of the one or more fields are set. As an example, the UE 104 may validate the activation control signal based on a CRC scrambled by an SPS-RNTI and one or more special fields of the corresponding DCI format. For example, the one or more fields may comprise at least one of a HARQ process number field and a redundancy version (RV) field. The one or more fields may be determined based on at least one of a total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled which is comprised in at least one of the SPS configuration or the activation control signal (in other words, the HARQ feedback enabled / disabled configuration / indication) .
[0088] In some embodiments, the activation control signal may comprise a HARQ feedback resource field, and its function may be determined based on at least one of the total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled. As an example, one state of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. As another example, the HARQ feedback resource field of the activation control signal may indicate the HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled. As a further example, the HARQ feedback resource and one of the HARQ process number field or the redundancy version field may jointly indicate a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled. The corresponding HARQ feedback resource may be indicated as a HARQ feedback resource (for example, one HARQ feedback resource) from a HARQ feedback resource set or be directly indicated time-frequency resource information (for example, the HARQ feedback resource time index and frequency index information) . Some related example implementations are discussed as follows.
[0089] In some implementations, if the total HARQ process number is configured as one, and enabling or disabling of the HARQ feedback for the data is not indicated based on the activation control signal, a HARQ feedback resource for the data may be determined based on the HARQ feedback resource field of the activation control signal. In this case, the one or more fields for validation may comprise the redundancy version field.
[0090] As an example implementation, if the maximal HARQ process number is configured as 1 and the HARQ feedback enable / disable feature is not configured (e.g., in the SPS configuration) , the HARQ feedback resource for the SPS PDSCH may be configured by the HARQ-ACK resource field (for example, with 4bits) in the DCI format N1. In this case, the special field for the validation in the DCI format N1 may be shown in the following Table 3: Table 3: example field for the validation
[0091] In some implementations, if the total HARQ process number is configured as one, and enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal, one state of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. In this case, the one or more fields for the validation may comprise the redundancy version field.
[0092] As an example implementation, if the maximal HARQ process number is configured as 1 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , one state (e.g., 1111) of the HARQ-ACK resource field (for example, with 4bits) in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, and other states of the field of the HARQ-ACK resource in the DCI format N1 may be used to indicate the SPS PDSCH with HARQ feedback and a corresponding HARQ feedback resource of the SPS PDSCH. In this case, the special field for the validation in the DCI format N1 may be shown in the following Table 4: Table 4: example field for the validation
[0093] In some implementations, if the total HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is not indicated based on the activation control signal, a HARQ feedback resource for the data may be determined based on the HARQ feedback resource field of the activation control signal. For example, the HARQ feedback resource field may indicate a HARQ feedback resource from a HARQ feedback resource set (e.g., indicate one HARQ feedback resource from the HARQ feedback resource set) or directly indicate a time-frequency resource (e.g., indicate the HARQ feedback resource time index and frequency index information) . In this case, the one or more fields for the validation may comprise the HARQ process number field and the redundancy version field.
[0094] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is not configured (e.g., in the SPS configuration) , the HARQ feedback resource for the SPS PDSCH may be configured by the HARQ-ACK resource field (for example, with 4bit) in the DCI format N1 (e.g., the HARQ-ACK resource field may indicate one HARQ feedback resource from a HARQ feedback resource set configured by a higher layer or directly indicate a time-frequency resource) . In this case, the special fields for validation in the DCI format N1 may be shown in the following Table 5: Table 5: example field for the validation
[0095] In some implementations, if the total HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is not indicated based on the activation control signal, one state of a HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. In this case, the one or more fields for the validation may comprise the HARQ process number field and the redundancy version field. The above implementations may also be possible to be adapted to the case where multiple TBs are scheduled by a single DCI, which means that the multiple TBs may have the same HARQ feedback enabled / disabled configuration, and the HARQ feedback resources for the multiple TBs may be the same and may be determined based on the HARQ feedback resource field as described above.
[0096] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , one state (e.g., 1111) of the HARQ-ACK resource field (for example, with 4bits) in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, and other states of the HARQ-ACK resource field may be used to indicate the SPS PDSCH with HARQ feedback and a corresponding HARQ feedback resource (e.g., the HARQ-ACK resource field may indicate one HARQ feedback resource from a HARQ feedback resource set configured by a higher layer or directly indicate a time-frequency resource) , and in this case, the special fields for the validation in the DCI format N1 may be shown in the following Table 6: Table 6: example field for the validation
[0097] In some implementations, if the total HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal, one state of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. The HARQ process number field or the redundancy version field of the activation control signal may indicate a HARQ process ID associated with the data with HARQ feedback enabled, and another HARQ process with a different HARQ process ID may be determined as HARQ feedback disabled. It may be set as default that at least one HARQ process is with feedback disabled. In this case, the other one of the HARQ process number field or the redundancy version field that is not used for the above indicating may be used as the field for the validation.
[0098] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , the HARQ feedback resource and the HARQ process number field (or the RV field) may be used to jointly indicate the HARQ feedback resource and / or HARQ feedback enabling or disabling. One state (e.g., 1111) of the HARQ-ACK resource field (for example, with 4bits) in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, other states of the HARQ-ACK resource field may be used to indicate the SPS PDSCH with HARQ feedback and a corresponding HARQ feedback resource (e.g., the HARQ-ACK resource field may indicate one HARQ feedback resource from a HARQ feedback resource set configured by a higher layer or directly indicate a time-frequency resource) . Further, the HARQ process number field may indicate a corresponding HARQ process number, which means that the other HARQ process number may be implicitly indicated as HARQ feedback disabled. In this case, at least one HARQ process with feedback disabled may be set as default. The special field for the validation in the DCI format N1 may be shown in the following Table 7: Table 7: example field for the validation
[0099] In some implementations, if the total HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal, one state of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource. The HARQ process number field or the redundancy version field of the activation control signal may indicate whether enabling or disabling of the HARQ feedback for the data indicated based on the activation control signal is adapted to a target HARQ process (for example, with a value of 0) or two HARQ processes (for example, with a value of 1) . Thus, the other HARQ process may be implicitly indicated as HARQ feedback disabled in case the HARQ process number field is ’ 0’ . In this case, the other one of the HARQ process number field or the redundancy version field that is not used for the above indicating may be used as the field for the validation.
[0100] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , the HARQ feedback resource and the HARQ process number field may be used to jointly indicate the HARQ feedback resource and / or HARQ feedback enabling or disabling. One state (e.g., 1111) of the HARQ-ACK resource field (for example, with 4bits) in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, other states of the HARQ-ACK resource field may be used to indicate the SPS PDSCH with HARQ feedback and a corresponding HARQ feedback resource (e.g., the HARQ-ACK resource field may indicate one HARQ feedback resource from a HARQ feedback resource set configured by a higher layer or directly indicate a time-frequency resource) . Further, the HARQ process number field may indicate whether the above HARQ enabled / disabled is adapted to only a target HARQ process (for example, HARQ process 0 or 1) (e.g., with a value of ‘0’ ) or both HARQ processes (e.g., with a value of ’ 1’ ) . In this case, the other HARQ process different from the target HARQ process (for example, HARQ process 1 or 0) may be implicitly indicated as HARQ feedback disabled in case the HARQ process number field is ’ 0’ . The special field for the validation in the DCI format N1 may be shown in the following Table 8: Table 8: example field for the validation
[0101] In some implementations, if the total HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal, one state of a first number of bits of the HARQ feedback resource field of the activation control signal may be used to indicate HARQ feedback for a first HARQ process associated with the data is disabled, and other states of the first number of bits may be used to indicate HARQ feedback for the first HARQ process is enabled and a corresponding HARQ feedback resource; and one state of a second number of bits of the HARQ feedback resource field may be used to indicate HARQ feedback for a second HARQ process associated with the data is disabled, and other states of the second number of bits may be used to indicate HARQ feedback for the second HARQ process is enabled and a corresponding HARQ feedback resource. In this case, the one or more fields for the validation may comprise the HARQ process number field and the redundancy version field.
[0102] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , for the 2 HARQ processes, the HARQ-ACK resource field may indicate the HARQ feedback resource and / or HARQ feedback enabling or disabling. For HARQ process 0, one state (e.g., 11) of least significant bit (LSB) 2bits of the HARQ-ACK resource field in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, and other 3 states of the LSB 2bits of the HARQ-ACK resource field may be used to indicate HARQ feedback enabled and a corresponding HARQ feedback resource. For HARQ process 1, one state (e.g., 11) of most significant bit (MSB) 2bits of the HARQ-ACK resource field in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, and other 3 states of MSB 2bits of the HARQ-ACK resource field may be used to indicate HARQ feedback enabled and a corresponding HARQ feedback resource. In this case, the special fields for the validation in the DCI format N1 may be shown in the following Table 9: Table 9: example field for the validation
[0103] In some implementations, if the total HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal, two bits of the HARQ feedback resource field of the activation control signal may be used to indicate whether HARQ feedback for a first HARQ process and a second HARQ process associated with the data is disabled or enabled respectively, and other bits of the HARQ feedback resource field may be used to indicate a corresponding HARQ feedback resource. In this case, the one or more fields for the validation may comprise the HARQ process number field and the redundancy version field.
[0104] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , for the 2 HARQ processes, the HARQ-ACK resource field may indicate the HARQ feedback resource and / or HARQ feedback enabling or disabling. The LSB 2bits of the HARQ-ACK resource field in the DCI format N1 may be used to indicate the SPS PDSCH with HARQ feedback enabled or disabled for the 2 HARQ processes separately, and the MSB 2bits of the HARQ-ACK resource field may be used to indicate a corresponding HARQ feedback resource if the HARQ feedback is enabled. In this case, the special fields for the validation in the DCI format N1 may be shown in the following Table 10: Table 10: example field for the validation
[0105] In some implementations, the HARQ process number is configured as two, and enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal, one state of a set of bits of the HARQ feedback resource field of the activation control signal may be used to indicate the data with HARQ feedback disabled, and other states of the set of bits may be used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource, and a bit of the HARQ feedback resource field may be used to indicate a target HARQ process to which enabling or disabling of the HARQ feedback for the data indicated based on the activation control signal is adapted. The other HARQ process may be implicitly indicated as with HARQ feedback disabled. It may be set as default that at least one HARQ process is associated with HARQ feedback disabled. In this case, the one or more fields for the validation may comprise the HARQ process number field and the redundancy version field.
[0106] As an example implementation, if the maximal HARQ process number is configured as 2 and the HARQ feedback enable / disable feature is configured (e.g., in the SPS configuration) , for the 2 HARQ processes, the HARQ-ACK resource field may indicate the HARQ feedback resource and / or HARQ feedback enabling or disabling. One state (e.g., 111) of MSB 3bits of the HARQ-ACK resource field in the DCI format N1 may be used to indicate the SPS PDSCH without HARQ feedback, and other 7 states of the MSB 3bits of the HARQ-ACK resource field may be used to indicate the HARQ feedback enabled and a corresponding HARQ feedback resource. The LSB 1bit of the HARQ-ACK resource field in the DCI format N1 may be used to indicate that the above HARQ enabled / disabled corresponds a target HARQ process number (for example, HARQ process 0) . The other HARQ process number may be implicitly indicated as HARQ feedback disabled. It may be set as default that at least one HARQ process feedback is disabled. In this case, the special fields for the validation in the DCI format N1 may be shown in the following Table 11: Table 11: example field for the validation
[0107] It is to be understood that the above embodiments regarding the SPS occasion or HARQ ID determination and the above embodiments regarding HARQ feedback enabled / disabled configure / indication can be implemented independently of each other, rather than relying on each other. The scope of the present disclosure is not limited in this regard.
[0108] According to some embodiments with reference to FIGS. 2 to 3B, it is allowed to support the HARQ feedback for SPS based communication in an IoT NTN in an efficient approach. Thus, it is possible to improve the communication performance in the IoT NTN.
[0109] FIG. 4 illustrates an example of a device 400 that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure. The device 400 may be an example of a UE 104 or a network entity 102 as described herein. The device 400 may support wireless communication with one or more devices in the communication system. The device 400 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 402, a memory 404, a transceiver 406, and, optionally, an I / O controller 408. 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) .
[0110] The processor 402, the memory 404, the transceiver 406, 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 402, the memory 404, the transceiver 406, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0111] In some implementations, the processor 402, the memory 404, the transceiver 406, 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 402 and the memory 404 coupled with the processor 402 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 402, instructions stored in the memory 404) .
[0112] For example, the processor 402 may support wireless communication at the device 400 in accordance with examples as disclosed herein. The processor 402 may be configured to operable to support a means for receiving a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal; a means for determining a plurality of SPS occasions for receiving data based on the SPS configuration; and a means for receiving the data on the plurality of SPS occasions, where information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal. The processor 402 may be configured to operable to support a means for transmitting a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions; and a means for transmitting data on the plurality of SPS occasions, where information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0113] The processor 402 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 402 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 402. The processor 402 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 404) to cause the device 400 to perform various functions of the present disclosure.
[0114] The memory 404 may include random access memory (RAM) and read-only memory (ROM) . The memory 404 may store computer-readable, computer-executable code including instructions that, when executed by the processor 402 cause the device 400 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 402 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 404 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.
[0115] The I / O controller 408 may manage input and output signals for the device 400. The I / O controller 408 may also manage peripherals not integrated into the device M02. In some implementations, the I / O controller 408 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 408 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 408 may be implemented as part of a processor, such as the processor 402. In some implementations, a user may interact with the device 400 via the I / O controller 408 or via hardware components controlled by the I / O controller 408.
[0116] In some implementations, the device 400 may include a single antenna 410. However, in some other implementations, the device 400 may have more than one antenna 410 (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 406 may communicate bi-directionally, via the one or more antennas 410, wired, or wireless links as described herein. For example, the transceiver 406 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 406 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 410 for transmission, and to demodulate packets received from the one or more antennas 410. The transceiver 406 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0117] 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 410 for transmitting the amplified signal into the air or wireless medium.
[0118] 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 410 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.
[0119] FIG. 5 illustrates an example of a processor 500 that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure. The processor 500 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 500 may include a controller 502 configured to perform various operations in accordance with examples as described herein. The processor 500 may optionally include at least one memory 504, such as L1 / L2 / L3 cache. Additionally, or alternatively, the processor 500 may optionally include one or more arithmetic-logic units (ALUs) 506. 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) .
[0120] The processor 500 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 500) 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) .
[0121] The controller 502 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 500 to cause the processor 500 to support various operations in accordance with examples as described herein. For example, the controller 502 may operate as a control unit of the processor 500, generating control signals that manage the operation of various components of the processor 500. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0122] The controller 502 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 504 and determine subsequent instruction (s) to be executed to cause the processor 500 to support various operations in accordance with examples as described herein. The controller 502 may be configured to track memory address of instructions associated with the memory 504. The controller 502 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 502 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 500 to cause the processor 500 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 502 may be configured to manage flow of data within the processor 500. The controller 502 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 500.
[0123] The memory 504 may include one or more caches (e.g., memory local to or included in the processor 500 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 504 may reside within or on a processor chipset (e.g., local to the processor 500) . In some other implementations, the memory 504 may reside external to the processor chipset (e.g., remote to the processor 500) .
[0124] The memory 504 may store computer-readable, computer-executable code including instructions that, when executed by the processor 500, cause the processor 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. The controller 502 and / or the processor 500 may be configured to execute computer-readable instructions stored in the memory 504 to cause the processor 500 to perform various functions. For example, the processor 500 and / or the controller 502 may be coupled with or to the memory 504, and the processor 500, the controller 502, and the memory 504 may be configured to perform various functions described herein. In some examples, the processor 500 may include multiple processors and the memory 504 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.
[0125] The one or more ALUs 506 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 506 may reside within or on a processor chipset (e.g., the processor 500) . In some other implementations, the one or more ALUs 506 may reside external to the processor chipset (e.g., the processor 500) . One or more ALUs 506 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 506 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 506 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 506 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 506 to handle conditional operations, comparisons, and bitwise operations.
[0126] The processor 500 may support wireless communication in accordance with examples as disclosed herein. The processor 500 may be configured to or operable to support a means for receiving a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal; a means for determining a plurality of SPS occasions for receiving data based on the SPS configuration; and a means for receiving the data on the plurality of SPS occasions, where information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal. The processor 500 may be configured to or operable to support a means for transmitting a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions; and a means for transmitting data on the plurality of SPS occasions, where information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
[0127] FIG. 6 illustrates a flowchart of a method 600 that supports an SPS transmission for an IoT NTN in accordance with aspects of the present disclosure. The operations of the method 600 may be implemented by a device or its components as described herein. For example, the operations of the method 600 may be performed by a 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.
[0128] At 610, the method may include receiving a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal. The operations of 610 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 610 may be performed by a UE 104 as described with reference to FIG. 1.
[0129] At 620, the method may include determining a plurality of SPS occasions for receiving data based on the SPS configuration. The operations of 620 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 620 may be performed by a UE 104 as described with reference to FIG. 1.
[0130] At 630, the method may include receiving the data on the plurality of SPS occasions, wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal. The operations of 630 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 630 may be performed by a UE 104 as described with reference to FIG. 1.
[0131] FIG. 7 illustrates a flowchart of a method 700 that supports an SPS transmission for an IoT 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 a 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.
[0132] At 710, the method may include transmitting a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions. 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 network entity 102 as described with reference to FIG. 1.
[0133] At 720, the method may include transmitting data on the plurality of SPS occasions, wherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal. 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 network entity 102 as described with reference to FIG. 1.
[0134] It should be noted that the methods described herein describe 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.
[0135] 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.
[0136] 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.
[0137] 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.
[0138] 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.
[0139] 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 (UE) comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the UE to:receive a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal;determine a plurality of SPS occasions for receiving data based on the SPS configuration; andreceive the data on the plurality of SPS occasions, andwherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.2.The UE of claim 1, wherein the plurality of SPS occasions are determined based on an SPS period and a start time of a first transmission of the data where configured downlink assignment was initialized or re-initialized.3.The UE of claim 2, wherein at least one of the following:the SPS period is with a unit of a radio frame or a subframe; orthe SPS period is determined based on a base period set and a scaling factor.4.The UE of claim 1, wherein a HARQ process identifier (ID) associated with the data is determined based on the information on whether the HARQ feedback for the data is enabled or disabled.5.The UE of claim 1, wherein a HARQ Process ID associated with the data is determined based on at least one of a time slot of the data, an SPS period, a total HARQ process number, or a target number, wherein the target number is configured in the SPS configuration.6.The UE of claim 5, wherein the data is associated with a first HARQ process for which HARQ feedback is enabled and a second HARQ process for which HARQ feedback is disabled, and wherein one of the target number of consecutive SPS occasions of the plurality of SPS occasions is configured for the first HARQ process, and the other one or more SPS occasions of the target number of SPS occasions are configured for the second HARQ process.7.The UE of claim 1, wherein the SPS configuration comprises a bitmap, and a respective bit of the bitmap indicates whether HARQ feedback for a respective HARQ process associated with the data is enabled or disabled.8.The UE of claim 1, wherein the SPS configuration comprises an indication indicating whether enabling or disabling of the HARQ feedback for the data is indicated based on the activation control signal.9.The UE of claim 1, wherein the at least one processor is further configured to cause the UE to:validate the activation control signal based on one or more fields of the activation control signal, wherein the one or more fields are determined based on at least one of a total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled.10.The UE of claim 9, wherein the one or more fields comprise at least one of a HARQ process number field and a redundancy version field.11.The UE of claim 1, wherein the activation control signal comprises a HARQ feedback resource field, a function of which is determined based on at least one of the total HARQ process number, or the information on whether HARQ feedback for the data is enabled or disabled.12.The UE of claim 11, wherein one state of the HARQ feedback resource field of the activation control signal is used to indicate the data with HARQ feedback disabled, and other states of the HARQ feedback resource field are used to indicate the data with HARQ feedback enabled and a corresponding HARQ feedback resource.13.The UE of claim 11, wherein the HARQ feedback resource field of the activation control signal indicates a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled.14.The UE of claim 11, wherein the activation control signal further comprises a HARQ process number field and a redundancy version field, and the HARQ feedback resource field and one of the HARQ process number field or the redundancy version field jointly indicate a HARQ process number for which HARQ feedback is enabled or disabled and a corresponding HARQ feedback resource for which HARQ feedback is enabled.15.A base station (BS) comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the BS to:transmit a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generating a plurality of semi-persistent scheduling (SPS) occasions; andtransmit data on the plurality of SPS occasions, andwherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.16.The BS of claim 15, wherein the plurality of SPS occasions are determined based on an SPS period and a start time of the data where configured downlink assignment was initialized or re-initialized.17.The BS of claim 16, wherein at least one of the following:the SPS period is with a unit of a radio frame or a subframe; orthe SPS period is determined based on a base period set and a scaling factor.18.The BS of claim 15, wherein a HARQ process identifier (ID) associated with the data is determined based on the information on whether the HARQ feedback for the data is enabled or disabled.19.A method performed by a user equipment (UE) , the method comprising:receiving a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal;determining a plurality of SPS occasions for receiving data based on the SPS configuration; andreceiving the data on the plurality of SPS occasions, andwherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signals.20.A method performed by a base station (BS) , the method comprising:transmitting a semi-persistent scheduling (SPS) configuration for an Internet of things (IoT) non-terrestrial network (NTN) and an activation control signal, wherein the SPS configuration comprises one or more parameters for generatinga plurality of semi-persistent scheduling (SPS) occasions; andtransmitting data on the plurality of SPS occasions, andwherein information on whether hybrid automatic repeat request (HARQ) feedback for the data is enabled or disabled is comprised in at least one of the SPS configuration or the activation control signal.
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