Beam hopping in wireless communication
The configuration of hybrid periods in beam hopping cycles addresses the limitations of satellite beam activation, enhancing geographical coverage and reducing latency and power consumption in satellite communication.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-10-01
- Publication Date
- 2026-04-09
AI Technical Summary
The limitation of downlink power and the number of RF chains at satellite payloads restricts simultaneous beam activation, leading to inefficient geographical coverage and varying user and traffic distributions in beam footprints, necessitating an effective DL beam hopping mechanism.
A method involving the configuration of hybrid periods within a beam hopping cycle, allowing flexible activation and deactivation of beam footprints based on traffic demands, with hybrid periods enabling both downlink and uplink transmissions.
Enhances geographical coverage by optimizing beam activation, reduces latency in initial access, and conserves battery life by adapting to variable traffic loads.
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Figure CN2024123152_09042026_PF_FP_ABST
Abstract
Description
BEAM HOPPING IN WIRELESS COMMUNICATION
[0001] FIELDS
[0002] Various example embodiments of the present disclosure generally relate to the field of telecommunication and in particular, to methods, devices, apparatuses and computer readable storage medium for beam hoping in wireless communication.BACKGROUND
[0003] Due to the limitation of downlink (DL) power and number of radio frequency (RF) RF chains available at the satellite payload, only a small portion of beam footprints could be simultaneously activated. For instance, typically only 106 beam footprints out of 1058 beam footprints could be activated simultaneously for LEO-600Km Set1-1 FR1 and LEO-600Km Set1-3 FR1, and only 16 beam footprints out of 1058 beam footprints could be activated simultaneously for LEO-600Km Set1-2 FR1. DL beam hopping is a must for NTN since satellite vendors is strongly willing to have a high geographical coverage.
[0004] In addition, the user distribution and traffic distribution in different beam footprints of a satellite may have big difference. Furthermore, due to the satellite moves and does not always cover the same location, both user distribution and traffic distribution of a beam footprint also varies greatly in timespan. For instance, there are some beam footprints with only “common messages” while some other beam footprints with both “common messages” and “user traffics” during a time, and traffic distribution among these beam footprints may be changed quickly. So, how to design the DL beam hopping mechanism, that is, which beam footprints should be activated during a time, in an efficient way is a basic and important issue.SUMMARY
[0005] In a first aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to: receive, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; and at least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.
[0006] In a second aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus at least to: configure one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; transmit, to a first apparatus, at least one of the following: a configuration of the one or more hybrid periods, an activation indication for at least one hybrid period within a beam hopping cycle, or a deactivation indication for at least one hybrid period within a beam hopping cycle.
[0007] In a third aspect of the present disclosure, there is provided a method. The method comprises: receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; and at least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.
[0008] In a fourth aspect of the present disclosure, there is provided a method. The method comprises: configuring one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; transmitting, to a first apparatus, at least one of the following: a configuration of the one or more hybrid periods, an activation indication for at least one hybrid period within a beam hopping cycle, or a deactivation indication for at least one hybrid period within a beam hopping cycle.
[0009] In a fifth aspect of the present disclosure, there is provided a first apparatus. The first apparatus comprises means for receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; and at least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.
[0010] In a sixth aspect of the present disclosure, there is provided a second apparatus. The second apparatus comprises means for configuring one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; means for transmitting, to a first apparatus, at least one of the following: a configuration of the one or more hybrid periods, an activation indication for at least one hybrid period within a beam hopping cycle, or a deactivation indication for at least one hybrid period within a beam hopping cycle.
[0011] In a seventh aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the third aspect.
[0012] In an eighth aspect of the present disclosure, there is provided a computer readable medium. The computer readable medium comprises instructions stored thereon for causing an apparatus to perform at least the method according to the fourth aspect.
[0013] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Some example embodiments will now be described with reference to the accompanying drawings, where:
[0015] FIG. 1A illustrates a diagram of example of 20ms dwelling window and the 320ms revisit period;
[0016] FIG. 1B illustrates a diagram of random access procedure;
[0017] FIG. 2A and FIG. 2B illustrate an example communication environments in which example embodiments of the present disclosure can be implemented;
[0018] [Rectified under Rule 91, 17.10.2024]FIG. 3 illustrates a signaling flow of communication in accordance with some embodiments of the present disclosure;
[0019] [Rectified under Rule 91, 17.10.2024]FIG. 4A illustrates an example diagram of hybrid period configuration in accordance with some embodiments of the present disclosure;
[0020] [Rectified under Rule 91, 17.10.2024]FIG. 4B illustrates an example diagram of hybrid period configuration in accordance with some embodiments of the present disclosure;
[0021] FIG. 4 illustrates an example diagram of offset and on-duration timer for configuration of Hybrid period;
[0022] FIG. 5A illustrate example diagrams of hybrid period allocation based on explicit activation indication;
[0023] FIG. 5B illustrate example diagrams of hybrid period allocation based on implicit activation indication;
[0024] FIG. 6 illustrates a signaling flow of communication in accordance with some embodiments of the present disclosure;
[0025] FIG. 7 illustrates an example diagram of an example of configuration of one or multiple hybrid periods in a beam hopping cycle;
[0026] FIG. 8 illustrates an example diagram of satellite level beam hopping based on hybrid period configuration;
[0027] FIG. 9 illustrates a flowchart of a method implemented at a first apparatus in accordance with some example embodiments of the present disclosure;
[0028] FIG. 10 illustrates a flowchart of a method implemented at a second apparatus in accordance with some example embodiments of the present disclosure;
[0029] FIG. 11 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure;
[0030] FIG. 12 illustrates a block diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
[0031] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0032] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[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 ordinary skills in the art to which this disclosure belongs.
[0034] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment 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 are not necessarily referring to the same embodiment. 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, ” “second” and 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. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0036] As used herein, “at least one of the following: <a list of two or more elements>” and “at least one of <a list of two or more elements>” and similar wording, where the list of two or more elements are joined by “and” or “or” , mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements.
[0037] As used herein, unless stated explicitly, performing a step “in response to A” does not indicate that the step is performed immediately after “A” occurs and one or more intervening steps may be included.
[0038] 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.
[0039] As used in this application, the term “circuitry” may refer to one or more or all of the following:
[0040] (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) and
[0041] (b) combinations of hardware circuits and software, such as (as applicable) :
[0042] (i) a combination of analog and / or digital hardware circuit (s) with software / firmware and
[0043] (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and
[0044] (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
[0045] This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
[0046] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as 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. Furthermore, the communications between a terminal device 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 fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, the sixth generation (6G) 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 of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0047] As used herein, the term “network device” refers to a node in a communication network via which a terminal device accesses the network and receives 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) , an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, an Integrated Access and Backhaul (IAB) node, a low power node such as a femto, a pico, a non-terrestrial network (NTN) or non-ground network device such as a satellite network device, a low earth orbit (LEO) satellite and a geosynchronous earth orbit (GEO) satellite, an aircraft network device, and so forth, depending on the applied terminology and technology. In some example embodiments, radio access network (RAN) split architecture comprises a Centralized Unit (CU) and a Distributed Unit (DU) at an IAB donor node. An IAB node comprises a Mobile Terminal (IAB-MT) part that behaves like a UE toward the parent node, and a DU part of an IAB node behaves like a base station toward the next-hop IAB node.
[0048] The term “terminal device” refers to any end device that may be capable of wireless communication. By way of example rather than limitation, a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) . The terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, 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 and applications (e.g., remote surgery) , an industrial device and applications (e.g., 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. The terminal device may also correspond to a Mobile Termination (MT) part of an IAB node (e.g., a relay node) . In the following description, the terms “terminal device” , “communication device” , “terminal” , “user equipment” and “UE” may be used interchangeably.
[0049] As used herein, the term “resource, ” “transmission resource, ” “resource block, ” “physical resource block” (PRB) , “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, for example, a communication between a terminal device and a network device, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like.
[0050] In some discussed schemes, one of the main objectives for the DL coverage enhancement in the new radio (NR) non-terrestrial network (NTN) is outlined in the following.
[0051] In some discussed schemes, the total number of simultaneously active beams may be restricted by satellite level power. If we inspect the scenarios considered in Sets 1-1, Set 1-2 and Set 1-3, simultaneous active beams are 10.02%, 1.5%and 10.02%, respectively, which determines the fraction of area that can be served under the satellite footprint. One way to increase the fraction of coverage area is to increase the number of simultaneous active beams. However, due to the power budget and number of Radio Frequency (RF) chains available at the satellite payload, the number of active beams can’ t be increased beyond certain limit. This eventually leads to the utilization of beam hopping.
[0052] For DL coverage study, consider the following additional reference satellite parameters scenarios for LEO-600km Set1 in FR1 (i.e., S-band) , referred to as Set1-1 FR1, Set1-2 FR1 and Set1-3 FR1.
[0053] LEO600km Set1-1 FR1 (i.e., S-band)
[0054] LEO600km Set1-2 FR1 (i.e., S-band)
[0055] LEO600km Set 1-3 FR1 (i.e., S-band)
[0056] Identifying necessary enhancements for these scenarios in the study phase is the aim.
[0057] For DL coverage study at system level, consider the following additional reference satellite payload parameters for LEO600km in FR2 (i.e., Ka-band) .
[0058] LEO600km Set1-1 FR2 (i.e., Ka-band)
[0059] In some discussed scheme, the UE in the cells with state of “common messages only” / “active traffic” might be served for initial access, i.e., served for Message 2 (Msg2) / Message 4 (Msg4) scheduling. In other words, the UE in the cells with state of “off” is not able to get scheduling for Msg2 / Msg4 in RRC_IDLE mode and any DL traffic in RRC_CONNECTED mode. Some agreements are discussed as below.
[0060] In some discussed schemes, the extension of SSB periodicity for NR NTN may be considered, and cell Discontinuous Transmission (DTX) with IDLE mode may be supported which would be a new feature on top of energy saving feature. Some agreements are discussed as below.
[0061] The observation of the results of DL coverage evaluation is shown in the following.
[0062] According to some discussed schemes, for cell Discontinuous Reception / Transmission DTX / DRX feature, the two periods including active and non-active periods may be configured by RRC signaling. When cell DTX is configured and activated for the concerned cell, the UE may not monitor the PDCCH in selected cases or does not monitor Semi-Persistent Scheduling (SPS) occasions during cell DTX non-active duration. This feature is only applicable to UEs in RRC_CONNECTED state and it does not impact Random Access procedure, SSB transmission, paging, and system information broadcasting. In other words, even during inactive periods, transmissions such as Msg 2 / 4 or Msg B for initial access, SSB, paging, and SIB may still occur.
[0063] Beam hopping scheme is proposed to allow multiple satellite footprint beams to share limited power resources. Therefore, during the inactive periods of beam hopping, all DL transmissions must be prohibited. Allowing DL transmissions during these inactive periods could lead to problems with the DL link budget due to insufficient power.
[0064] The following illustrates the operation of cell DTX / DRX according to some discussed schemes. To facilitate reducing gNB downlink transmission / uplink reception active time, UE can be configured with a periodic cell DTX / DRX pattern (i.e., active and non-active periods) . The pattern configuration for cell DTX / DRX is common for the UEs configured with this feature in the cell. The cell DTX and cell DRX patterns can be configured and activated separately. A maximum of two cell DTX / DRX patterns can be configured per Medium Access Control (MAC) entity for different serving cells. When cell DTX is configured and activated for the concerned cell, the UE may not monitor PDCCH in selected cases or does not monitor SPS occasions during cell DTX non-active duration. When cell DRX is configured and activated for the concerned cell, the UE does not transmit on Configured Grant (CG) resources or does not transmit a Scheduling Request (SR) during cell DRX non-active duration. This feature is only applicable to UEs in RRC_CONNECTED state and it does not impact Random Access procedure, SSB transmission, paging, and system information broadcasting. Cell DTX / DRX operation is only supported for single TRP scenario. Cell DTX / DRX can be activated / deactivated by RRC signalling or L1 group common signalling. Cell DTX / DRX is characterized by the following:
[0065] -Active duration: duration that the UE waits for to receive PDCCHs or SPS occasions, and transmit SR or CG. In this duration, the gNB transmission / reception of PDCCH, SPS, SR, CG, periodic and semi-persistent Channel State Information (CSI) report are not impacted for the purpose of network energy saving;
[0066] -Cycle: specifies the periodic repetition of the active-duration followed by a period of non-active duration.
[0067] Parameter configuration of cell DTX / DRX shown in the following is copied from some discussed schemes.
[0068] In some other discussed schemes, some schemes are proposed: using "dynamic scheduling / beam steering" for the residual time-domain resources that are not occupied by SSB, SIB1, and SIB19 during dwelling time. Based on the proposal, during 20ms dwelling time, the first 10ms is semi-static configured for transmission of common channel that is targeting to provide basic coverage for satellite beam footprints; and the second 10ms is dynamically scheduling in cell level depending on traffic. However, it remains unclear how this solution can be implemented within a semi-static configuration of pattern only with the active / inactive mode.
[0069] · One possible implementation, the residual time-domain resources (i.e., 2nd 10ms) can transmit data of all beams (beam#0 –beam#3) in given cell. Obviously, this solution cannot reach the target of dynamic load balancing in satellite level but only cell level.
[0070] · One possible implementation to support the 2nd 10ms being allocated to the beam footprints of other cells (satellite level dynamic scheduling) is that all the UEs belong to the all the beam footprints of a satellite need to keep monitoring PDCCH / PDSCH all the time so that a UE could know if there is a PDCCH / PDSCH scheduling for it. Obviously, it’s not optimal and not acceptable from UE’s power consumption point of view. For example, assuming LEO-600km Set 1-1 with SSB periodicity 320ms, a beam footprint could be activated for 170ms (10ms for common signal and 16x10=160ms for dynamic scheduling) . A UE of the beam footprint could still stop to monitor PDCCH / PDSCH for 150ms in every 320ms during the common signal transmission for other beam footprint. In general, a beam footprint might be activated for only about 32ms in every 320ms (that is, about 10%of SSB periodicity the beam footprint is activated) if assuming the active time of each beam footprint are the same. So, it’s a big (32ms vs 170ms) and unnecessary waste of UE power if requesting a UE to always monitor PDCCH / PDSCH in NTN with DL beam hopping enabled.
[0071] Reference is now made to FIG. 1A, which illustrates a diagram 100A of example of 20ms dwelling window and the 320ms revisit period for Set 1-2. The transmission of those information over 4 beam footprints will occupy at least 10ms of the 20ms within dwelling window. Then the residual time-domain resources not used for SSB, SIB1 and SIB 19 (e.g., the last 10ms of the dwelling window) may be used for the dynamic scheduling depending on the traffic, such as scheduling for the same beam footprints as SSB or other beam footprints.
[0072] As mentioned above, due to the limitation of DL power and number of RF chains available at the satellite payload, only a small portion of beam footprints could be simultaneously activated. For instance, typically only 106 beam footprints out of 1058 beam footprints could be activated simultaneously for LEO-600km Set 1-1 FR1 and LEO-600km Set1-3 FR1. DL beam hopping is a must for NTN since satellite vendors is strongly willing to have 100%geographical coverage.
[0073] In addition, the user distribution and traffic distribution in different beam footprints of a satellite may have big difference. Furthermore, due to the satellite moves and does not always cover the same location, both user distribution and traffic distribution of a beam footprint also varies greatly in timespan. For instance, as mentioned above, there are some beam footprints with only “common messages” while some other beam footprints with both “common messages” and “user traffics” during a time, and traffic distribution among these beam footprints may be changed quickly. So, how to design the DL beam hopping mechanism, that is, which beam footprints should be activated during a time, in an efficient way is a basic and important problem in NTN.
[0074] For the design of DL beam hopping, to get 100%geographical coverage, at least common messages such as SSB / SIB1 / SIB19 of each beam footprint should be transmitted in every SSB period. Considering one or multiple beam footprints may be covered by a cell, for instance, it could be only 1 beam footprint per cell for LEO-600km Set1-1 FR1 and LEO-600km Set1-3 FR1 while it could be 4 beam footprints per cell for LEO-600km Set1-2 FR1, one semi-static time period within a SSB period could be allocated for each cell (or each beam footprint) for the transmission of the common messages of each beam footprint. However, allocating only a semi-static timeperiod for each cell (or each beam footprint) for the transmission of both common messages and user traffics is not optimal and may not be acceptable because the modification of a semi-static time period configured for a cell (or a beam footprint) may result in significant signaling overhead. It is because the semi-static time period of other cells (or other beam footprints) may also need to be modified accordingly due to the restriction of maximum number of simultaneously activated beam footprints of a satellite.
[0075] In addition, DL beam hopping also needs to consider the impact to random access procedure, for instance, the transmission of Msg2 and Msg4 in CBRA scenario and Msg2 in Contention Free Random Access (CFRA) scenario. For example, in the example of FIG. 1B, when SSB period is configured as 160ms which might be a typical value in NTN. Then it’s not possible to transmit Msg2 if the Random Access Response (RAR) window corresponding to a preamble has no overlap with the configured semi-static time period (that is, the active period within a SSB period) . One possible method is to extend the length of configured semi-static time period to make both Msg2 and Msg4 be able to be transmitted within the semi-static period. However, the main problem with this method is that the length of the configured semi-static time period would be quite big and lead to a big waste in UE’s power consumption. (Note: all the UEs of a cell need to monitor PDCCH during the configured semi-static time period) .
[0076] In order to solve at least part of the above problems or other potential problems, a solution for beam hoping in wireless communication is proposed. In the solution, a method comprises receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; and at least based on a reception of the configuration and / or an activation / deactivation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.
[0077] Example embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0078] Example Environment
[0079] FIG. 2A illustrates an example communication environment 200A in which example embodiments of the present disclosure can be implemented. The communication environment 200A includes a plurality of communication devices that containing one or more second apparatus (such as, the second apparatus 220-1, the optional second apparatus 220-2 and the optional second apparatus 220-3) and a first apparatus 210. The serving area of the second apparatus 220-1 may be called a cell. In the example of FIG. 2A, the communication environment 200A includes cell 202-1 and optional cells 202-2 and 202-3.
[0080] In some example embodiments, a transmission direction from the second apparatus 220 to the first apparatus 210 is referred to as a downlink (DL) , while a transmission direction from first apparatus 210 to the second apparatus 220 is referred to as an uplink (UL) . In DL, the second apparatus 220-1 / 220-2 / 220-3 is a transmitting (TX) device (or a transmitter) and the first apparatus 210 is a receiving (RX) device (or a receiver) . In UL, the first apparatus 210 is a TX device (or a transmitter) and the second apparatus 220-1 / 220-2 / 220-3 is a RX device (or a receiver) .
[0081] FIG. 2B illustrates an example of the communication environment 200A shown in FIG. 2A. As shown in FIG. 2B, the second apparatuses 220-1, 220-2 and 220-3 may be NTN devices. It is noted that an NTN device is only an example of the second apparatus.
[0082] It is to be understood that the number of devices and their connections shown in FIG. 2A and FIG. 2B are only for the purpose of illustration without suggesting any limitation. The communication environments 200A and 200B may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cells, and one or more additional cells may be deployed in the communication environments 200A and 200B. In some example embodiments, operations described in connection with a first apparatus may be implemented at a second apparatus or other device, and operations described in connection with a second apparatus may be implemented at a first apparatus or other device.
[0083] Communications in the communication environments 200A and 200B may be implemented according to any proper communication protocol (s) , comprising, but not limited to, cellular communication protocols, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols currently known or to be developed in the future. Moreover, the communication may utilize any proper wireless communication technology, comprising but not limited to: Code Division Multiple Access (CDMA) , Frequency Division Multiple Access (FDMA) , Time Division Multiple Access (TDMA) , Frequency Division Duplex (FDD) , Time Division Duplex (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiple (OFDM) , Discrete Fourier Transform spread OFDM (DFT-s-OFDM) and / or any other technologies currently known or to be developed in the future.
[0084] Work Principle and Example Signaling for Communication
[0085] According to some example embodiments of the present disclosure, a dynamic Time Domain Multiplexing (TDM) beam scheduling / beam hopping design to improve the (NTN) network performance is proposed. More specifically, it is proposed a new configuration of hybrid period within beam hopping pattern on top of active duration and inactive duration and further relevant signaling and handling mechanism for beam hopping. With the example embodiments of the present disclosure, the flexibility for satellite beam scheduling on variable traffic load of different beam footprints may be achieved, and the activation indication-based hybrid period usage is beneficial to battery saving of UE side. Further, the hybrid slice is also beneficial to reduce the latency of Msg 2 / 4 during initial access and download data transmission during RRC-Connected mode.
[0086] Work principle will be discussed with reference to FIG. 3, which illustrates a signaling flow 300 of communication in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 300 will be discussed with reference to FIG. 2A and FIG. 2B, for example, by using the first apparatus 210 and the second apparatus 220, where the first apparatus 210 may function as a terminal apparatus and the second apparatus 220 may function as a network apparatus.
[0087] It is to be understood that the operations at the first apparatus 210 and the second apparatus 220 should be coordinated. In other words, the second apparatus 220 and the first apparatus 210 should have a common understand about configurations, parameters and so on. Such a common understand may be implemented by any suitable interactions between the second apparatus 220 and the first apparatus 210 or both the second apparatus 220 and the first apparatus 210 applying the same rule, policy, and / or the like.
[0088] In the following, although some operations are described from a perspective of the first apparatus 210, it is to be understood that the corresponding operations should be performed by the second apparatus 220. Similarly, although some operations are described from a perspective of the second apparatus 220, it is to be understood that the corresponding operations should be performed by the first apparatus 210. Merely for brevity, some of the same or similar contents are omitted here.
[0089] In the following example embodiments, a beam hopping cycle may be a cyclic time span for at least one uplink transmission or at least one downlink reception. Further, the beam hopping cycle may include at least one of the following: one or more active periods, one or more inactive periods, and / or one or more hybrid periods.
[0090] In operation, as illustrated in FIG. 3, the second apparatus 220 configures (310) one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell.
[0091] In some cases, the second apparatus 220 further transmits (320-1) a configuration of the one or more hybrid periods to a first apparatus 210, and the first apparatus 210 receives (320-2) the configuration of one or more hybrid periods from a second apparatus 220.
[0092] In some example embodiments, the configuration may indicate respective default status (es) of the one or more hybrid periods, and a default status may be configured as activated or deactivated. Further, the respective default status (es) may be pre-defined by such as, wireless standard (e.g., 3GPP) . If so, the first apparatus 210 may apply / activate / deactivate the one or more hybrid periods according to the respective default status (es) , and thus no additional signaling for activating / deactivating the one or more hybrid periods from the second apparatus 220 is needed.
[0093] In some example embodiments, the second apparatus transmits a configuration of the one or more hybrid periods to a first apparatus via system information. The first apparatus performs at least a downlink reception and / or an uplink transmission during the configured one or more hybrid periods. It’s worth noting that no dynamic activation / deactivation mechanism for the configured hybrid periods is introduced so that the signaling complexity could be reduced. In addition, here there is only one status for the configured hybrid periods, that is, active status.
[0094] In some example embodiments, the second apparatus transmits a de-configuration of the one or more hybrid periods to a first apparatus via system information. The first apparatus drops at least a downlink reception and / or an uplink transmission during the de-configured one or more hybrid periods.
[0095] In some example embodiments, the first apparatus 210 may receive the configuration via system information.
[0096] More details about the configuration and / or the one or more hybrid periods are discussed in the following.
[0097] In some example embodiments, each hybrid period may be configured with a respective hybrid period index.
[0098] In some example embodiments, the one or more hybrid periods may comprise a single hybrid period, where the single hybrid period may be configured at the start, the middle, or the end of the beam hopping cycle. Refer to the example of FIG. 4A, which illustrates an example diagram 400A of hybrid period configuration. In the example of FIG. 4A, the single hybrid period is configured at the end of the beam hopping cycle.
[0099] Alternatively, in some example embodiments, the one or more hybrid periods comprise a plurality of hybrid periods, where the plurality of hybrid periods may be distributed evenly or unevenly within the beam hopping cycle. Refer to the example of FIG. 4B, which illustrates an example diagram 400B of hybrid period configuration. In the example of FIG. 4B, 5 hybrid periods are distributed within the beam hopping cycle.
[0100] In some example embodiments, respective number of hybrid periods may be configured for different beam footprints or different cells. In this case, respective configuration of one or more hybrid periods for different beam footprints or different cells may be configured individually.
[0101] [Rectified under Rule 91, 17.10.2024]Alternatively, or in addition to the configuration of the one or more hybrid periods, in some example embodiments, the second apparatus 220 also may transmit (320-1) an activation indication for at least one hybrid period to the first apparatus 210. Similarly, in some example embodiments, the second apparatus also may transmit (320-1) a deactivation indication for at least one hybrid period to the first apparatus 210.
[0102] In some example embodiments, the activation indication and / or the deactivation indication may be included in a group-based downlink control information. In some example embodiments, the activation indication and / or the deactivation indication may be configured with a monitoring occasion during the active period for a first apparatus 210 in idle mode. In some example embodiments, the activation indication and / or the deactivation indication may be transmitted via downlink control information or system information.
[0103] In summary, below at least part of below operations may be implemented: the second apparatus 220 may provide a configuration of the one or more hybrid periods to a first apparatus 210, the configuration may be associated with a default / initial status (activated or deactivated) , an activation indication for at least one hybrid period and / or a deactivation indication for at least one hybrid period may be provided by the second apparatus 220 to the first apparatus 210, the first apparatus 210 may determine whether to apply / activate / deactivate configuration of the one or more hybrid periods based on at least one of the following: the reception of the configuration, the default / initial status of the configuration, or the reception of the an activation indication for at least one hybrid period or a deactivation indication for at least one hybrid period. Some examples about whether / how to activate / apply the configuration of hybrid period (s) will be discussed below.
[0104] [Rectified under Rule 91, 17.10.2024]In some example embodiments, in a case that a default status of a hybrid period is configured as deactivated, the first apparatus 210 may perform at least one of the downlink reception or the uplink transmission during the hybrid period in response to receiving an activation indication for the hybrid period.
[0105] [Rectified under Rule 91, 17.10.2024]In some example embodiments, the first apparatus 210 may activate a hybrid period upon a reception of the activation indication or based on a default status configured as activated. Further, in some example embodiments, if the first apparatus 210 receives a deactivation indication for the hybrid period is received, the first apparatus 210 may stop (350) the downlink reception or the uplink transmission during the hybrid period.
[0106] As discussed above, the activation indication and / or the deactivation indication may be included in a group-based downlink control information. In this event, in some example embodiments, in accordance with a determination the group-based downlink control information is to be applied for the first apparatus 210 and there is a hybrid period index in the group-based downlink control information, the first apparatus 210 may determine the at least one hybrid period is to be activated.
[0107] [Rectified under Rule 91, 17.10.2024]In some example embodiments, the first apparatus 210 may determine whether the hybrid period is to be activated / deactivated based on an RNTI specified for the activation indication and / or the deactivation indication, where the group-based downlink control information is attached with CRC scrambled by the RNTI.
[0108] In some example embodiments, the RNTI for a CRC scrambling of a downlink control channel is common for all the first apparatuses 210 of a cell or a beam footprint, or is common for a group of first apparatuses 210. Further the RNTI may be pre-defined or configured.
[0109] Further refer to FIG. 3. Based at least in part on a reception of the configuration and / or an activation indication for at least one hybrid period, the first apparatus 210 performs (340-1) at least one of a downlink reception or an uplink transmission during the at least one hybrid period. It should be noted the corresponding operation may be performed (340-2) by the second apparatus 220-2.
[0110] In some example embodiments, in accordance with a determination that a hybrid period is activated, the first apparatus 210 may perform an uplink transmission and / or a downlink reception within the hybrid period.
[0111] According to some examples of the present disclosure, the lengths of start offsets of different hybrid periods may be flexibly configured. Specifically, in some example embodiments, different hybrid periods may have a same or different start offsets. In some example embodiments, different hybrid periods may have a same length or different lengths.
[0112] In some example embodiments, in accordance with a determination of the reception of the configuration of the one or more hybrid periods, the first apparatus 210 may determine a length of at least one hybrid period based on an associated on-duration timer.
[0113] In some example embodiments, the first apparatus 210 may obtain an offset associated with at least one hybrid period and may start the associated on-duration timer based on the offset and the start of the active period.
[0114] In some example embodiments, the first apparatus 210 may obtain an offset associated with at least one hybrid period, and may start the associated on-duration timer based on the offset and the start of a beam hopping cycle.
[0115] In some example embodiments, the first apparatus 210 may drop (350) an uplink transmission or a downlink reception within the hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.
[0116] In some example embodiments, in accordance with a determination that the first apparatus 210 is configured with a downlink configured grant, the first apparatus 210 may drop a monitoring of downlink transmission within a hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.
[0117] Embodiments
[0118] Merely for better a better understanding, some example embodiments are further discussed with reference to FIG. 3A to FIG. 8. It should be understood that these example embodiments should not be interpreted as any limitation for the present disclosure.
[0119] In the following example embodiments, the beam hopping pattern is but not limit to cell specific, e.g., it might be beam footprint specific.
[0120] As discussed above, a new configuration of hybrid period for the beam hopping pattern may be introduced. In some example embodiments, during one beam hopping cycle, only one hybrid period may be configured. When hybrid period is configured, the network may schedule downlink (DL) data for cells with greater flexibility, allowing it to schedule cells based on actual needs.
[0121] Reference is now made to FIG. 3A and FIG. 3B, where cells in FIG. 3A and FIG. 3B may include a cell cluster with a beam set that can be simultaneously transmitted by satellite, i.e., the maximum number of simultaneous beams is 106 for LEO-600km set 1-1 / 1-3 and 16 for LEO-600km set 1-2. In some example embodiments, the hybrid period may be configured in the tail of beam hopping cycle, as shown in FIG. 3A below. In another example, the hybrid period may be configured in anywhere within beam hopping cycle.
[0122] In some example embodiments, during one beam hopping cycle, multiple hybrid periods may be configured. The multiple hybrid periods may be distributed evenly or unevenly within the cycle, allowing the network to respond to UEs in cells more quickly, thereby reducing latency. In some example embodiments, each hybrid period is assigned an index, allowing the network to allocate and schedule individual hybrid periods. As shown in FIG. 3B, there are five hybrid periods distributed evenly in the middle of the cycle.
[0123] In some example embodiments, the cells of a satellite may have different configurations of hybrid period. In one example embodiment, the cells of a satellite may be configured with different numbers of hybrid periods. In another example embodiment, the configured hybrid periods of the cells of a satellite may have different lengths. In a further example embodiment, the configured hybrid periods of the cells of a satellite may have different start offsets.
[0124] Reference is now made to FIG. 4, which illustrates an example diagram 400 of offset and on-duration timer for hybrid period. As illustrated, in some example embodiments, a hybrid on-duration timer may be used to configure the length of the active duration for a hybrid period. Further, in some example embodiments, an offset may be configured to configure the delay before the hybrid on-duration timer starts.
[0125] The UE behavior during hybrid period when hybrid period activated will be discussed in the following.
[0126] In some example embodiments, when beam hopping pattern is configured and activated for the concerned cell, the UE may not monitor the PDCCH during the hybrid period unless it receives an activation indication for the hybrid period. In this way, the UE may save battery during the hybrid period.
[0127] Reference is now made to FIG. 5A, which illustrates an example diagram 500A of hybrid period allocation based on activation indication. In the example of FIG. 5A, network indicates that Cell 3 is allocated for hybrid period in active duration. Thus, only the UEs in Cell 3 may start monitoring PDCCH during hybrid period.
[0128] In some example embodiments, when beam hopping pattern is configured and activated for the concerned cell, a DL configured grant (CG) UE may not monitor the PDSCH during the hybrid period unless it receives an activation indication for the hybrid period.
[0129] In some example embodiments, when beam hopping pattern is configured and activated for the concerned cell, the UE may monitor PDCCH during hybrid period. Reference is now made to FIG. 5B, which illustrates an example diagram 500B of hybrid period allocation based on activation indication. In the example of FIG. 5B, the UEs in Cells 1-10 start monitoring PDCCH during hybrid period. Further, network schedules DL data for Cell 3 based on needs. In this way, system signaling overhead may be reduced, i.e., hybrid period allocation based on dynamic scheduling by network.
[0130] The signaling of activation / de activation indication for hybrid period are discussed in the following.
[0131] In some example embodiments, the activation indication may be a group-based PDCCH, which may be configured with a monitoring occasion during the active period in case RRC_IDLE mode. The group may be at the cell level or a predefined / configured group, where UEs may be designated.
[0132] In some example embodiments, the group-based PDCCH contains the DCI with CRC scrambled by RNTI for hybrid period activation indication (HPAI-RNTI) .
[0133] In some example embodiments, the activation indication may be an IE in system information, e.g., SIB1 or other SI.
[0134] Reference is now made to FIG. 6, which illustrates a signaling flow 600 of communication in accordance with some embodiments of the present disclosure. In the example of FIG. 6, the second apparatus 220 may provide SSB to the first apparatus 210.
[0135] In operation, the second apparatus 220 may configure (610) hybrid period of beam hopping pattern. Such configuration may be provided (615) to the first apparatus 210 via SIB1 or OSI.
[0136] The first apparatus 210 may decode (620) the SIB1 or OSI and get hybrid period configuration. In the following, the first apparatus 210 may start (625) monitoring group-based PDCCH with CRC scrambled by HPAI-RNTI.
[0137] The PDCCH with CRC scrambled by HPAI-RNTI may be transmitted (630) to the first apparatus 210. In some embodiments, PDCCH with CRC scrambled by HPAI-RNTI may be sent on the active period of beam hopping cycle. The first apparatus 210 may decode (635) PDCCH with CRC scrambled by HPAI-RNTI and receive hybrid period activation indication.
[0138] Then, the first apparatus 210 may start (640) monitoring PDCCH in hybrid period. Within the hybrid period, PDCCH and / or PUSCH transmission may be performed (645) .
[0139] One example pf the configuration of hybrid period for the beam hopping pattern is illustrated as below.
[0140] Reference is now made to FIG. 7, which illustrates an example diagram 700 of an example of configuration of one or multiple hybrid periods in a beam hopping cycle. One example of multiple Hybrid period configuration is illustrated as below.
[0141] The UE behavior during hybrid period when hybrid period activated is discussed in the following.
[0142] Reference is now made to FIG. 8, which illustrates an example diagram 800 of an example for hybrid period application in satellite level. In the example of FIG. 8, the horizontal axis is time domain while the vertical axis is beam footprint domain. All 1058 beam footprints are divided into 16 clusters, each cluster includes 66 (1058 / 16=66) beam footprints for transmission of SSB / SIBs or data and 40 (106-66=40) for data traffic. A SSB periodicity is divided into 32 time slices and the time domain resource of each slice can serve maximum number of simultaneously activated beam footprints, e.g., 106 beam footprints out of 1058 beam footprints could be activated simultaneously for LEO-600km Set 1-1 FR1 and LEO-600km Set1-3 FR1.
[0143] Further, the first active period is exclusively occupied by 66 beam footprints (1058 / 16) where the SSB, SIB1 and SIB19 are transmitted in the first half 10ms, and other DL data can be transmitted in the second half 10ms. The second active period, i.e., Hybrid period, can be dynamically scheduled for 40 beam footprints for balancing traffic among cells in satellite or cluster level, as assuming the maximum number of simultaneously activated beam footprints is 106.
[0144] In this manner, the service ratio of beam footprint for common message is about 100% (66x16 / 1058) during SSB periodicity and the service ratio of beam footprint for data traffic 62.3% (40x16 / 1058) during the hybrid period and 100% (the same as common message service ratio of beam footprints) during the first active period.
[0145] Furthermore, the interval between first active period and hybrid period can cover RTT, therefore, the Msg2 / MsgB corresponding to preambles initialized in the first active period might be transmitted in the second active period.
[0146] Example Method
[0147] FIG. 9 shows a flowchart of an example method 900 implemented at a first apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the first apparatus 210 in FIG. 2A and FIG. 2B.
[0148] At block 910, the first apparatus receives, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell.
[0149] At block 920, at least based on a reception of the configuration and / or an activation indication for at least one hybrid period, the first apparatus performs, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.
[0150] In some example embodiments, the beam hopping cycle is a cyclic time span for at least one uplink transmission or at least one downlink reception and includes at least one of the following: one or more active periods, one or more inactive periods, and / or one or more hybrid periods.
[0151] In some example embodiments, the one or more hybrid periods comprise a single hybrid period, wherein the single hybrid period is configured at the start, the middle, or the end of the beam hopping cycle.
[0152] In some example embodiments, the one or more hybrid periods comprise a plurality of hybrid periods, and wherein the plurality of hybrid periods is distributed evenly or unevenly within the beam hopping cycle.
[0153] In some example embodiments, each of the plurality of hybrid periods is configured with a respective hybrid period index.
[0154] In some example embodiments, the plurality of hybrid periods has same or different lengths.
[0155] In some example embodiments, the plurality of hybrid periods has same or different start offsets.
[0156] In some example embodiments, respective number of hybrid periods are configured for different beam footprints or different cells, and wherein respective configuration of one or more hybrid periods for different beam footprints or different cells are configured individually.
[0157] In some example embodiments, the first apparatus may receive the configuration via system information.
[0158] In some example embodiments, the configuration indicates respective default statuses of the one or more hybrid periods, and wherein a default status is configured as activated or deactivated.
[0159] In some example embodiments, in accordance with a determination that an activation indication for the hybrid period is received, the first apparatus may perform at least one of the downlink reception or the uplink transmission during the hybrid period.
[0160] In some example embodiments, in accordance with a determination that a deactivation indication for the hybrid period is received, the first apparatus may stop the downlink reception or the uplink transmission during remaining time of the hybrid period.
[0161] In some example embodiments, the first apparatus may receive, from the second apparatus, the activation indication and / or the deactivation indication via downlink control information or system information.
[0162] In some example embodiments, the activation indication and / or the deactivation indication is included in a group-based downlink control information.
[0163] In some example embodiments, in accordance with a determination the group-based downlink control information is to be applied for the first apparatus, and in accordance with a determination the indicating a hybrid period index in the group-based downlink control information, the first apparatus may determine the at least one hybrid period is to be activated.
[0164] In some example embodiments, the first apparatus may determine whether the hybrid period is to be activated / deactivated based on an RNTI specified for the activation indication and / or the deactivation indication, by which the group-based downlink control information is scrambled.
[0165] In some example embodiments, the RNTI for a cycle redundant check, CRC, scrambling of a downlink control channel is common for all the first apparatuses of a cell or a beam footprint, or is common for a group of first apparatuses, and wherein the RNTI is pre-defined or configured.
[0166] In some example embodiments, the activation indication and / or the deactivation indication is configured with a monitoring occasion during the active period for a first apparatus in idle mode.
[0167] In some example embodiments, in accordance with a determination of the reception of the configuration of the one or more hybrid periods, the first apparatus may determine a length of at least one hybrid period based on an associated on-duration timer.
[0168] In some example embodiments, the first apparatus may obtain an offset associated with at least one hybrid period; and start the associated on-duration timer based on the offset and the start of the active period.
[0169] In some example embodiments, the first apparatus may obtain an offset associated with at least one hybrid period; and start the associated on-duration timer based on the offset and the start of a beam hopping cycle.
[0170] In some example embodiments, the first apparatus may drop an uplink transmission or a downlink reception within the hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.
[0171] In some example embodiments, in accordance with a determination that the first apparatus is configured with a downlink configured grant, the first apparatus may drop a monitoring of downlink transmission within a hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.
[0172] In some example embodiments, in accordance with a determination that a hybrid period is activated, the first apparatus may perform an uplink transmission and / or a downlink reception within the hybrid period.
[0173] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.
[0174] FIG. 10 shows a flowchart of an example method 1000 implemented at a second apparatus in accordance with some example embodiments of the present disclosure. For the purpose of discussion, the method 1000 will be described from the perspective of the second apparatus 220 in FIG. 2A and FIG. 2B.
[0175] At block 1010, the second apparatus configures one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell.
[0176] At block 1020, the second apparatus transmits, to a first apparatus, at least one of the following: a configuration of the one or more hybrid periods, an activation indication for at least one hybrid period within a beam hopping cycle, or a deactivation indication for at least one hybrid period within a beam hopping cycle .
[0177] In some example embodiments, the beam hopping cycle is a cyclic time span for at least one uplink transmission or at least one downlink reception and includes at least one if the following: one or more active periods, one or more inactive periods, and / or one or more hybrid periods.
[0178] In some example embodiments, the one or more hybrid periods comprise a single hybrid period, wherein the single hybrid period is configured at the start, the middle or the end of the beam hopping cycle.
[0179] In some example embodiments, the one or more hybrid periods comprise a plurality of hybrid periods, and wherein the plurality of hybrid periods is distributed evenly or unevenly within the beam hopping cycle.
[0180] In some example embodiments, each of the plurality of hybrid periods is configured with a respective hybrid period index.
[0181] In some example embodiments, the plurality of hybrid periods has same or different lengths.
[0182] In some example embodiments, the plurality of hybrid periods has same or start offsets.
[0183] In some example embodiments, respective number of hybrid periods are configured for different beam footprints or different cells, and wherein respective configuration of one or more hybrid periods for different beam footprints or different cells are configured individually.
[0184] In some example embodiments, the second apparatus may transmit the configuration via system information.
[0185] In some example embodiments, the configuration indicates respective default statuses of the one or more hybrid periods, and wherein a default status is configured as activated or deactivated.
[0186] In some example embodiments, the second apparatus may transmit the activation indication for the at least one hybrid period via downlink control information or system information.
[0187] In some example embodiments, the second apparatus may transmit a deactivation indication for the at least one hybrid period via downlink control information or system information.
[0188] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.
[0189] Example Apparatus, Device and Medium
[0190] In some example embodiments, a first apparatus capable of performing any of the method 900 (for example, the first apparatus 210 in FIG. 2A and FIG. 2B) may comprise means for performing the respective operations of the method 900. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The first apparatus may be implemented as or included in the first apparatus 210 in FIG. 2A and FIG. 2B.
[0191] In some example embodiments, the first apparatus comprises means for receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; and at least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.
[0192] In some example embodiments, the beam hopping cycle is a cyclic time span for at least one uplink transmission or at least one downlink reception and includes at least one of the following: one or more active periods, one or more inactive periods, and / or one or more hybrid periods.
[0193] In some example embodiments, the one or more hybrid periods comprise a single hybrid period, wherein the single hybrid period is configured at the start, the middle, or the end of the beam hopping cycle.
[0194] In some example embodiments, the one or more hybrid periods comprise a plurality of hybrid periods, and wherein the plurality of hybrid periods is distributed evenly or unevenly within the beam hopping cycle.
[0195] In some example embodiments, each of the plurality of hybrid periods is configured with a respective hybrid period index.
[0196] In some example embodiments, the plurality of hybrid periods has same or different lengths.
[0197] In some example embodiments, the plurality of hybrid periods has same or different start offsets.
[0198] In some example embodiments, respective number of hybrid periods are configured for different beam footprints or different cells, and wherein respective configuration of one or more hybrid periods for different beam footprints or different cells are configured individually.
[0199] In some example embodiments, the first apparatus further comprises: means for receiving the configuration via system information.
[0200] In some example embodiments, the configuration indicates respective default statuses of the one or more hybrid periods, and wherein a default status is configured as activated or deactivated.
[0201] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that an activation indication for the hybrid period is received, performing at least one of the downlink reception or the uplink transmission during the hybrid period.
[0202] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that a deactivation indication for the hybrid period is received, stopping the downlink reception or the uplink transmission during remaining time of the hybrid period.
[0203] In some example embodiments, the first apparatus further comprises: means for receiving, from the second apparatus, the activation indication and / or the deactivation indication via downlink control information or system information.
[0204] In some example embodiments, the activation indication and / or the deactivation indication is included in a group-based downlink control information.
[0205] In some example embodiments, the first apparatus further comprises: in accordance with a determination the group-based downlink control information is to be applied for the first apparatus, in accordance with a determination the indicating a hybrid period index in the group-based downlink control information, means for determining the at least one hybrid period is to be activated.
[0206] In some example embodiments, the first apparatus further comprises: means for determining whether the hybrid period is to be activated / deactivated based on an RNTI specified for the activation indication and / or the deactivation indication, by which the group-based downlink control information is scrambled.
[0207] In some example embodiments, the RNTI for a cycle redundant check, CRC, scrambling of a downlink control channel is common for all the first apparatuses of a cell or a beam footprint, or is common for a group of first apparatuses, and wherein the RNTI is pre-defined or configured.
[0208] In some example embodiments, the activation indication and / or the deactivation indication is configured with a monitoring occasion during the active period for a first apparatus in idle mode.
[0209] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination of the reception of the configuration of the one or more hybrid periods, determining a length of at least one hybrid period based on an associated on-duration timer.
[0210] In some example embodiments, the first apparatus further comprises: means for obtaining an offset associated with at least one hybrid period; and means for starting the associated on-duration timer based on the offset and the start of the active period.
[0211] In some example embodiments, the first apparatus further comprises: means for obtaining an offset associated with at least one hybrid period; and means for starting the associated on-duration timer based on the offset and the start of a beam hopping cycle.
[0212] In some example embodiments, the first apparatus further comprises: means for dropping an uplink transmission or a downlink reception within the hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.
[0213] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that the first apparatus is configured with a downlink configured grant, dropping a monitoring of downlink transmission within a hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.
[0214] In some example embodiments, the first apparatus further comprises: means for in accordance with a determination that a hybrid period is activated, performing an uplink transmission and / or a downlink reception within the hybrid period.
[0215] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.
[0216] In some example embodiments, a second apparatus capable of performing any of the method 1000 (for example, the second apparatus 220 in FIG. 2A and FIG. 2B) may comprise means for performing the respective operations of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module. The second apparatus may be implemented as or included in the second apparatus 220 in FIG. 2A and FIG. 2B.
[0217] In some example embodiments, the second apparatus comprises means for configuring one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; means for transmitting, to a first apparatus, at least one of the following: a configuration of the one or more hybrid periods, an activation indication for at least one hybrid period within a beam hopping cycle, or a deactivation indication for at least one hybrid period within a beam hopping cycle.
[0218] In some example embodiments, the beam hopping cycle is a cyclic time span for at least one uplink transmission or at least one downlink reception and includes at least one if the following: one or more active periods, one or more inactive periods, and / or one or more hybrid periods.
[0219] In some example embodiments, the one or more hybrid periods comprise a single hybrid period, wherein the single hybrid period is configured at the start, the middle or the end of the beam hopping cycle.
[0220] In some example embodiments, the one or more hybrid periods comprise a plurality of hybrid periods, and wherein the plurality of hybrid periods is distributed evenly or unevenly within the beam hopping cycle.
[0221] In some example embodiments, each of the plurality of hybrid periods is configured with a respective hybrid period index.
[0222] In some example embodiments, the plurality of hybrid periods has same or different lengths.
[0223] In some example embodiments, the plurality of hybrid periods has same or start offsets.
[0224] In some example embodiments, respective number of hybrid periods are configured for different beam footprints or different cells, and wherein respective configuration of one or more hybrid periods for different beam footprints or different cells are configured individually.
[0225] In some example embodiments, the second apparatus further comprises: means for transmitting the configuration via system information.
[0226] In some example embodiments, the configuration indicates respective default statuses of the one or more hybrid periods, and wherein a default status is configured as activated or deactivated.
[0227] In some example embodiments, the second apparatus further comprises: means for transmitting the activation indication for the at least one hybrid period via downlink control information or system information.
[0228] In some example embodiments, the second apparatus further comprises: means for transmitting a deactivation indication for the at least one hybrid period via downlink control information or system information.
[0229] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.
[0230] FIG. 11 is a simplified block diagram of a device 1100 that is suitable for implementing example embodiments of the present disclosure. The device 1100 may be provided to implement a communication device, for example, the first apparatus 210 or the second apparatus 220 as shown in FIG. 2A and FIG. 2B. As shown, the device 1100 includes one or more processors 1110, one or more memories 1120 coupled to the processor 1110, and one or more communication modules 1140 coupled to the processor 1110.
[0231] The communication module 1140 is for bidirectional communications. The communication module 1140 has one or more communication interfaces to facilitate communication with one or more other modules or devices. The communication interfaces may represent any interface that is necessary for communication with other network elements. In some example embodiments, the communication module 1140 may include at least one antenna.
[0232] The processor 1110 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1100 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0233] The memory 1120 may include one or more non-volatile memories and one or more volatile memories. Examples of the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 1124, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , an optical disk, a laser disk, and other magnetic storage and / or optical storage. Examples of the volatile memories include, but are not limited to, a random-access memory (RAM) 1122 and other volatile memories that will not last in the power-down duration.
[0234] A computer program 1130 includes computer executable instructions that are executed by the associated processor 1110. The instructions of the program 1130 may include instructions for performing operations / acts of some example embodiments of the present disclosure. The program 1130 may be stored in the memory, e.g., the ROM 1124. The processor 1110 may perform any suitable actions and processing by loading the program 1130 into the RAM 1122.
[0235] The example embodiments of the present disclosure may be implemented by means of the program 1130 so that the device 1100 may perform any process of the disclosure as discussed with reference to FIG. 2A to FIG. 10. The example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
[0236] In some example embodiments, the program 1130 may be tangibly contained in a computer readable medium which may be included in the device 1100 (such as in the memory 1120) or other storage devices that are accessible by the device 1100. The device 1100 may load the program 1130 from the computer readable medium to the RAM 1122 for execution. In some example embodiments, the computer readable medium may include any types of non-transitory storage medium, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like. The term “non-transitory, ” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM) .
[0237] FIG. 12 shows an example of the computer readable medium 1200 which may be in form of CD, DVD or other optical storage disk. The computer readable medium 1200 has the program 1130 stored thereon.
[0238] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, and other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. Although various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0239] Some example embodiments of the present disclosure also provide at least one computer program product tangibly stored on a computer readable medium, such as a non-transitory computer readable medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target physical or virtual processor, to carry out any of the methods as described above. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0240] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. The program code may be provided to a processor or controller of a general-purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program code, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0241] In the context of the present disclosure, the computer program code or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above. Examples of the carrier include a signal, computer readable medium, and the like.
[0242] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random-access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0243] Further, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, although several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Unless explicitly stated, certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, unless explicitly stated, various features that are described in the context of a single embodiment may also be implemented in a plurality of embodiments separately or in any suitable sub-combination.
[0244] Although the present disclosure has been described in languages specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A first apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the first apparatus at least to:receive, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; andat least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.2.The first apparatus of claim 1, wherein the beam hopping cycle is a cyclic time span for at least one uplink transmission or at least one downlink reception and includes at least one of the following:one or more active periods,one or more inactive periods, and / orone or more hybrid periods.3.The first apparatus of claim 1 or 2, wherein the one or more hybrid periods comprise a single hybrid period, wherein the single hybrid period is configured at the start, the middle, or the end of the beam hopping cycle.4.The first apparatus of claim 1 or 2, wherein the one or more hybrid periods comprise a plurality of hybrid periods, and wherein the plurality of hybrid periods is distributed evenly or unevenly within the beam hopping cycle.5.The first apparatus of claim 4, wherein each of the plurality of hybrid periods is configured with a respective hybrid period index.6.The first apparatus of claim 4, wherein the plurality of hybrid periods has same or different lengths.7.The first apparatus of claim 4, wherein the plurality of hybrid periods has same or different start offsets.8.The first apparatus of claim 1, wherein respective number of hybrid periods are configured for different beam footprints or different cells, and wherein respective configuration of one or more hybrid periods for different beam footprints or different cells are configured individually.9.The first apparatus of any of claims 1-8, wherein the first apparatus is caused to:receive the configuration via system information.10.The first apparatus of any of claim 1-9, wherein the configuration indicates respective default statuses of the one or more hybrid periods, and wherein a default status is configured as activated or deactivated.11.The first apparatus of claim 1-10, wherein a default status of a hybrid period is configured as deactivated, and wherein the first apparatus is caused to:in accordance with a determination that an activation indication for the hybrid period is received, perform at least one of the downlink reception or the uplink transmission during the hybrid period.12.The first apparatus of claim 1-10, wherein a hybrid period is activated upon a reception of the activation indication or based on a default status configured as activated, and wherein the first apparatus is caused to:in accordance with a determination that a deactivation indication for the hybrid period is received, stop the downlink reception or the uplink transmission during remaining time of the hybrid period.13.The first apparatus of claim 12, wherein the first apparatus is caused to:receive, from the second apparatus, the activation indication and / or the deactivation indication via downlink control information or system information.14.The first apparatus of any of claims 1-10, wherein the activation indication and / or the deactivation indication is included in a group-based downlink control information.15.The first apparatus of claim 14, wherein the first apparatus is caused to:in accordance with a determination the group-based downlink control information is to be applied for the first apparatus,in accordance with a determination the indicating a hybrid period index in the group-based downlink control information,determine the at least one hybrid period is to be activated.16.The first apparatus of claim 14 or 15, wherein the first apparatus is caused to:determine whether the hybrid period within a beam hopping cycle is to be activated / deactivated based on an RNTI specified for the activation indication and / or the deactivation indication, by which the group-based downlink control information is scrambled.17.The first apparatus of claims 16, wherein the RNTI for a cycle redundant check, CRC, scrambling of a downlink control channel is common for all the first apparatuses of a cell or a beam footprint, or is common for a group of first apparatuses, and wherein the RNTI is pre-defined or configured.18.The first apparatus of claim 12, wherein the activation indication and / or the deactivation indication is configured with a monitoring occasion during the active period for a first apparatus in idle mode.19.The first apparatus of claim 12, wherein the first apparatus is caused to:in accordance with a determination of the reception of the configuration of the one or more hybrid periods, determine a length of at least one hybrid period based on an associated on-duration timer.20.The first apparatus of claim 19, wherein the first apparatus is caused to:obtain an offset associated with at least one hybrid period; andstart the associated on-duration timer based on the offset and the start of the active period.21.The first apparatus of claim 19, wherein the first apparatus is caused to:obtain an offset associated with at least one hybrid period; andstart the associated on-duration timer based on the offset and the start of a beam hopping cycle.22.The first apparatus of claim 12, wherein the first apparatus is caused to:drop an uplink transmission or a downlink reception within the hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.23.The first apparatus of claim 12, wherein the first apparatus is caused to:in accordance with a determination that the first apparatus is configured with a downlink configured grant, drop a monitoring of downlink transmission within a hybrid period if the activation indication for the hybrid period is not received or a deactivation indication for the hybrid period is received.24.The first apparatus of claim 1, wherein the first apparatus is caused to:in accordance with a determination that a hybrid period is activated, perform an uplink transmission and / or a downlink reception within the hybrid period.25.The first apparatus of any of claims 1-20, wherein the first apparatus comprises a terminal device and the second apparatus comprises a network device.26.A second apparatus comprising:at least one processor; andat least one memory storing instructions that, when executed by the at least one processor, cause the second apparatus at least to:configure one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell;transmit, to a first apparatus, at least one of the following:a configuration of the one or more hybrid periods,an activation indication for at least one hybrid period within a beam hopping cycle, ora deactivation indication for at least one hybrid period within a beam hopping cycle.27.The second apparatus of claim 26, wherein the beam hopping cycle is a cyclic time span for at least one uplink transmission or at least one downlink reception and includes at least one if the following:one or more active periods,one or more inactive periods, and / orone or more hybrid periods.28.The second apparatus of claim 26 or 27, wherein the one or more hybrid periods comprise a single hybrid period, wherein the single hybrid period is configured at the start, the middle or the end of the beam hopping cycle.29.The second apparatus of claim 26 or 27, wherein the one or more hybrid periods comprise a plurality of hybrid periods, and wherein the plurality of hybrid periods is distributed evenly or unevenly within the beam hopping cycle.30.The second apparatus of claim 29, wherein each of the plurality of hybrid periods is configured with a respective hybrid period index.31.The second apparatus of claim 29, wherein the plurality of hybrid periods has same or different lengths.32.The second apparatus of claim 29, wherein the plurality of hybrid periods has same or start offsets.33.The second apparatus of claim 26, wherein respective number of hybrid periods are configured for different beam footprints or different cells, and wherein respective configuration of one or more hybrid periods for different beam footprints or different cells are configured individually.34.The second apparatus of any of claims 26-33, wherein the second apparatus is caused to:transmit the configuration via system information.35.The second apparatus of any of claim 26-33, wherein the configuration indicates respective default statuses of the one or more hybrid periods, and wherein a default status is configured as activated or deactivated.36.The second apparatus of any of claims 26-35, wherein the second apparatus is caused to:transmit the activation indication for the at least one hybrid period via downlink control information or system information.37.The second apparatus of any of claims 26-36, wherein the second apparatus is caused to:transmit a deactivation indication for the at least one hybrid period via downlink control information or system information.38.The second apparatus of any of claims 26-37, wherein the first apparatus comprises a terminal device and the second apparatus comprises a network device.39.A method comprising:receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; andat least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.40.A method comprising:configuring one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell;transmitting, to a first apparatus, at least one of the following:a configuration of the one or more hybrid periods,an activation indication for at least one hybrid period within a beam hopping cycle, ora deactivation indication for at least one hybrid period within a beam hopping cycle.41.A first apparatus comprising:means for receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; andat least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.42.A second apparatus comprising:means for configuring one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell;means for transmitting, to a first apparatus, at least one of the following:a configuration of the one or more hybrid periods,an activation indication for at least one hybrid period within a beam hopping cycle, ora deactivation indication for at least one hybrid period within a beam hopping cycle.43.A computer readable medium comprising instructions stored thereon for causing an apparatus at least to perform the method of claim 39 or the method of claim 40.
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