Devices and methods for beam management
DQTX/DQRX in NTN systems addresses power and bandwidth limitations by configuring beams with varying QoS levels, optimizing system performance and compatibility across different UE types.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NEC CORP
- Filing Date
- 2024-02-08
- Publication Date
- 2026-07-30
AI Technical Summary
Existing non-terrestrial network (NTN) technologies face challenges in efficiently managing beam configurations to support legacy and new user equipment (UEs) due to limited transmission power, feeder link bandwidth, and power sharing among satellite beams, leading to suboptimal system throughput and compatibility issues.
Implementing discontinuous Quality of Service (QoS) transmission (DQTX) and reception (DQRX) with configurable transmission periods and QoS levels for beams, allowing flexible power and bandwidth management, enabling efficient coordination of UE configurations and maximizing system performance under power and feeder link constraints.
Enhances system throughput and compatibility by optimizing power and bandwidth usage, supporting both legacy and new UEs, while ensuring backward and forward compatibility, and reducing latency in NTN environments.
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Figure CN2024077086_30072026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR BEAM MANAGEMENT
[0001] FIELDS
[0002] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for beam management.BACKGROUND
[0003] A non-terrestrial network (NTN) refers to a network or segment of networks using radio frequency (RF) resources onboard a satellite or unmanned aircraft system (UAS) platform. The NTN could provide ubiquitous and resilient wireless service beyond the terrestrial network coverage. The 3rd Generation Partnership Project (3GPP) has started the standardization of NTN since the fifth generation (5G) communication system. NTN is expected to be fully integrated with TN in the sixth generation (6G) .SUMMARY
[0004] In a first aspect, there is provided a network device comprising: a processor configured to cause the network device to: determine at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and transmit the at least one configuration to a terminal device.
[0005] In a second aspect, there is provided a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and perform downlink reception from the network device based on a configuration of a serving beam of the at least one beam.
[0006] In a third aspect, there is provided a communication method performed by a network device. The method comprises: determining at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and transmitting the at least one configuration to a terminal device.
[0007] In a fourth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and performing downlink reception from the network device based on a configuration of a serving beam of the at least one beam.
[0008] In a fifth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the third, or fourth aspect.
[0009] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0011] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0012] FIG. 2A and FIG. 2B illustrate schematic diagrams of non-terrestrial network scenarios with different payload types in accordance with some embodiments of the present disclosure;
[0013] FIG. 3 illustrates a schematic diagram of beam hopping;
[0014] FIG. 4 illustrates a schematic diagram of cell discontinuation transmission (DTX) / discontinuation reception (DRX) ;
[0015] FIG. 5 illustrates a signaling flow of beam management in accordance with some embodiments of the present disclosure;
[0016] FIG. 6 illustrates a schematic diagram of example transmission configurations and example reception patterns in accordance with some embodiments of the present disclosure;
[0017] FIG. 7 illustrates a schematic diagram of example transmission configurations and example reception patterns in accordance with some embodiments of the present disclosure;
[0018] FIG. 8 illustrates a schematic diagram of example transmission configurations and example reception patterns in accordance with some embodiments of the present disclosure;
[0019] FIG. 9A and FIG. 9B illustrate the key points to determine the maximum serving time of one beam or one satellite under earth-fixed cell and earth-moving cell, respectively, in accordance with some embodiments of the present disclosure;
[0020] FIG. 10 illustrates a flowchart of a method implemented at a network device according to some example embodiments of the present disclosure;
[0021] FIG. 11 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure;
[0022] FIG. 12 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0023] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , extended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further have ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal, or a wireless device.
[0027] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0028] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function and can be used to predict some information.
[0029] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex, and cross division duplex modes.
[0030] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0031] As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0032] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0033] As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0034] Example environment
[0035] FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a network device 120 may a plurality of terminal devices 110-1, 110-2 and 110-3, which are collectively referred to as terminal devices 110 or individually referred to as a terminal device 110. In an example of FIG. 1, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE.
[0036] It is to be understood that the number of devices and their connections shown in FIG. 1 is only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implement example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be deployed in the communication environment 100.
[0037] In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a gNB. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other devices.
[0038] A link from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL) . In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) . In communication, the terminal device 110 may perform uplink transmission with the network device 120, for example PUSCH transmission. DMRS bundling may be needed for transmission occasions of the uplink transmission.
[0039] The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0040] In some embodiments, the communication environment 100 may be implemented in the NTN. The NTN may have different payload types. FIG. 2A and FIG. 2B illustrate schematic diagrams of NTN scenarios with different payload types. The NTN of FIG. 2A is based on a transparent payload, and the NTN of FIG. 2B is based on a regenerative payload.
[0041] In some example embodiments, a satellite or UAS platform may implement either a transparent or a regenerative (with onboard processing) payload. The satellite or UAS platform may generate beams (for example, typically generate several beams) over a given service area bounded by its field of view 260. The footprints 250 of the beams are typically of an elliptic shape. The field of view of a satellite or UAS platform depends on the on-board antenna diagram and the minimum elevation angle. Table 1 shows some parameters for some example platforms.
[0042] Table 1
[0043] As shown in FIG. 2A, in a transparent payload scenario, a UE 210 may communicate with the satellite 220 or UAS platform through a service link, and the satellite 220 or UAS platform may communicate with a gateway 230 having connection with a data network 240 through a feeder link. In this scenario, the satellite 220 or UAS platform may perform RF filtering, frequency conversion and amplification, therefore a waveform signal repeated by the payload may be unchanged. Based on the transparent payload, the UE 210 may have a connection with the data network 240. The round-trip time (RTT) in this case reflects the time for data to transmit from the UE 210 through the satellite 220 or UAS platform to a gNB (which is on the ground) .
[0044] As shown in FIG. 2B, in a regenerative payload scenario, the UE 210 may communicate with a satellite 220-1 or UAS platform through a service link. The satellite 220-1 or UAS platform may communicate with a satellite 220-2 or UAS platform through Inter-Switch Link (ISL) , and the satellite 220-2 or UAS platform may communicate with the gateway 230 having a connection with the data network 240 through a feeder link. If ISL is not available, the satellite 220 or UAS platform may communicate with the gateway 230 having a connection with a data network 240 through a feeder link. In this scenario, the satellite 220-1 and 220-2 (or UAS platform) may perform RF filtering, frequency conversion and amplification, demodulation / decoding, switch and / or routing, and coding / modulation which is effectively equivalent to having all or part of base station (for example, gNB) functions on the satellite or UAS platform. Based on the regenerative payload, the UE 210 may have a connection with the data network 240. The RTT in this case reflects the time for data to transmit from the UE 210 to the gNB (which is on the satellite or UAS platform) .
[0045] In some embodiments, multiple beams may be provided by a satellite to serve UEs. Example multi-beam requirements are shown below. Herein, Table 2 shows Set-1 satellite parameters for system-level simulator calibration.
[0046] Table 2
[0047] Table 3 shows set-2 satellite parameters for system-level simulator calibration.
[0048] Table 3
[0049] As an example, with a minimal 30-degree elevation angle assumption, 1000+beams are required to provide the full coverage of a satellite. Furthermore, the DL link budget will be constrained by the active beam numbers as the active beams will share the limit power from the payload.
[0050] FIG. 3 shows a schematic diagram of beam hopping (BH) . In a BH system, a defined sub-set of beams may be illuminated at any time. For example, the defined subset of beams includes cluster #1, cluster #2, and cluster #3. Each beam in the cluster has variable dwell times, power, and bandwidth allocations. Full coverage with limited active beams in a timely division manner may be provided with such a BH system. For example, beam hopping strategies may be applied in Digital Video Broadcasting-Second Generation Satellite Extensions (DVB-S2X) . In some cases, a prescheduled BH with regular and periodic illumination patterns may be provided. In some other cases, a traffic-driven (i.e., driven by traffic profile) BH with a non-periodic illumination pattern (Beam Hopping Time Plan) may be provided.
[0051] It should be noted that different types of NTN terminals own different characteristics, as shown in Table 4.
[0052] Table 4
[0053] As an example, link budget can be calculated by the following equation:
[0054] Network energy saving (NES) modes have been proposed. In NES mode, cell DTX / DRX may be employed. The goal of Cell DTX / DRX is to reduce the time that the cell is on and transmits / receives signals, with a few limitations. Thus, the cell DTX / DRX configuration contains at least the parameters of periodicity, start slot / offset, on duration. The pattern configuration for cell DRX / DTX is common for Rel-18 UEs in the cell. Furthermore, cell DTX / DRX configuration may be provided per Serving Cell. A maximum of two cell DTX / DRX aligned patterns can be configured per MAC entity.
[0055] Regarding activation / deactivation of the cell DTX / DRX, a periodic cell DTX / DRX configuration may be explicitly signaled to the UEs via UE-specific RRC signaling. The activation / deactivation also has the following characteristics: common for the cell, L1 and L3, no L2 and independent DRX and DTX can be observed.
[0056] Reference is made to FIG. 4, which illustrates a schematic diagram of cell DTX / DRX in accordance with some embodiments of the present disclosure. An example procedure of the cell DTX / DRX is now described. At step 1, a network device decides to put a cell in NES DTX / DRX. At step 2, system information (SI) is updated about the cell becoming in NES state. Herein, a huge impact is generated at step 2 on legacy UE since legacy UEs need to be moved out similarly to a cell switching off.
[0057] At step 3, connected UEs are configured with corresponding UE C-DRX configurations. Herein, alignment is assured between C-DRX and Cell DTX configurations. At step 4, the network device ensures proper termination of ongoing procedures. At step 5, the cell goes into cell DTX / DRX, at a certain slot for a certain periodicity and duration. Furthermore, L1 signaling may be used as a trigger.
[0058] Regarding downlink coverage enhancements, it is proposed to study and specify if beneficial downlink coverage enhancements targeting support for additional reference satellite payload parameters covering both GSO and NGSO constellations operating in frequency range 1 (FR1) -NTN or frequency range 2 (FR2) -NTN. Further, it is proposed to define additional reference satellite payload parameters assuming power sharing among satellite beams or different satellite beam patterns / size (i.e. wide or narrow) across the satellite footprint, such that satellite beams may not all be simultaneously active or may be active below the nominal EIRP density per satellite beam (see section 6.1.1 in TR 38.821) due to limited power and limited feeder link bandwidth.
[0059] In addition, it is proposed to define the corresponding power-sharing assumptions and necessary link level and system level evaluation methodology and relevant KPIs for evaluations of the coverage, to allow for identification of physical channels / signals and system-level aspects that need enhancements and the corresponding needed improvements.
[0060] Furthermore, it is proposed to study and if needed specify solutions, including link level enhancements for FR1-NTN, e.g. physical downlink control channel (PDCCH) , physical downlink shared channel (PDSCH and / or system level enhancements for FR1- NTN and / or FR2-NTN, allowing dynamic and flexible power sharing between satellite beams or different satellite beam patterns / size (i.e. wide or narrow) across the satellite footprint.
[0061] It should be noted that for this objective that SSB channel enhancement is not considered. Antenna gain of UE shall be assumed to be -5.5dBi in the case of smartphone in FR1-NTN, the UE is assumed to be a full duplex UE, and at least 2Rx are considered at the UE. NGSO to be considered in priority: LEO Set-1 @600 km. Furthermore, release (Rel) -18 network energy-saving techniques should be considered as a baseline in the system-level study.
[0062] Given the above, there are some issues to be solved. A first issue is to support legacy UE without NES capability to access the limited satellite resources in the early stage of NTN, which means that the legacy UE cannot be moved out as R-18 NES.
[0063] The second issue is to efficiently coordinate the UEs (including legacy UEs and new UEs) with the network on the configurations due to limited transmission power (for transparent / regenerative NTN) . Herein, the configurations may include time domain configurations, and power domain configurations. Furthermore, the time domain configurations comprise periodicity, start slot / offset, and on duration period. Power domain configurations may comprise power level settings that meet the requirements of different terminal types to maximize the system throughput.
[0064] The third issue is to efficiently coordinate the UEs (including legacy UEs and new UEs) with the network on the configurations due to limited feeder link bandwidth (for transparent NTN) . Similarly, the configurations include time domain configurations, and power domain configurations. Furthermore, the time domain configurations comprise periodicity, start slot / offset, and on duration period. Power domain configurations comprise power level settings that meet the requirements of different terminal types to maximize the system throughput.
[0065] The fourth issue is how to coordinate SSB with other physical channels.
[0066] In view of the above, embodiments of the present disclosure propose a solution for beam management in order to at least solve at least some of the above issues. DL transmission from a beam or a cell may include a transmission cycle which includes a plurality of transmission periods. Among these transmission periods, at least two transmission periods correspond to different Quality of Service (QoS) levels, respectively. Such transmission may be referred to as discontinue QoS transmission (DQTX) and the corresponding reception may be referred to as discontinue QoS reception (DQRX) . The DQTX / DQRX may be implemented in a granularity of cell, which is also referred to as cell DQTX / DQRX. Alternatively, the DQTX / DQRX may be implemented in a granularity of beam, which is also referred to as beam DQTX / DQRX. In the following, the embodiments may be described with reference to the beam DQTX / DQRX. However, such embodiments can be applied to cell DQTX / DQRX. Moreover, the terms “DQTX” and “DQRX” are used as example without any limitation. If beam (cell) DQTX / DQRX is activated, the network device may operate in a network dynamic QoS (NDQ) mode. The DQTX / DQRX can be also configured for terminals in connected mode, and then UE could transmit / receive signal with the network under different QoS levels.
[0067] Reference is made to FIG. 5, which illustrates a signaling flow 500 of beam management in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 200 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
[0068] In operation, the network device 120 determines 505 at least one configuration for transmission from at least one beam provided by the network device 120. Each configuration of the at least one configuration (which is also referred to as DQTX configuration) corresponds to a beam of the at least one beam and indicates a plurality of transmission periods of the corresponding beam. At least two transmission periods of the plurality of transmission periods corresponds to different QoS levels, respectively. Then, the network device 120 transmits 510 the at least one configuration to the terminal device 110.
[0069] In some example embodiments, a QoS level may comprise at least one of: a transmission power level, a transmission bandwidth size, or a beam size. For example, the transmission of a beam may include transmission periods with different transmission powers. For another example, the transmission of a beam may include transmission periods with different bandwidth sizes. For a further example, the transmission of a beam may include transmission periods with different beam sizes. In the embodiments of the present disclosure, QoS level may be used interchangeably with the transmission power level, the transmission bandwidth size, or a beam size.
[0070] In the following, an active period may refer to a transmission period corresponding to a QoS level higher than a threshold, and a non-active period (or non-active period) may refer to a transmission period corresponding to a QoS level lower than the threshold. In some embodiments, transmission of a beam may include active periods corresponding to different levels, respectively.
[0071] In some example embodiments, respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain. For example, the network device 120 coordinates and indicates different beams / cells provided by one satellite to distribute active DQTX periods without fully overlapping.
[0072] In some example embodiments, the at least one beam has the same transmission cycle, which is also referred to as DQTX cycle. The at least one beam may be provided by the same satellite or different satellites. For example, the network device 120 configures and indicates the same DQTX cycle for all the beams / cells provided by one or more satellites serving a certain geographic area.
[0073] In some example embodiments, respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle. For example, the network device 120 configures and indicates different DQTX offsets for different beams / cells provided by one satellite.
[0074] In some example embodiments, respective active periods of neighboring beams are adjacent to each other in time domain. For example, the network device 120 coordinates the active DQTX period of two neighbor beams / cells close to each other. These neighbor beams / cells may be provided by the same satellite or different satellites. If these neighbor beams / cells are provided by different satellites, an efficiency for switching between satellites can be improved.
[0075] In operation, the terminal device 110 receives 515, from a network device 120, at least one configuration for transmission from at least one beam provided by the network device. Then, the terminal device 110 performs 520 downlink reception from the network device based on a configuration of a serving beam of the at least one beam. For example, the terminal device 110 determines reference signal occasions based on the DQTX configuration, and may schedule the traffic based on the DQTX configurations.
[0076] In some example embodiments, the terminal device 110 may enable or disable Hybrid Automatic Repeat Request (HARQ) feedback based on the DQTX configuration. For example, if negative feedback (NACK) to downlink transmission from the serving cell occurs within a non-active period of the serving cell, the terminal device 110 may disable HARQ feedback to the downlink transmission from the serving cell.
[0077] In some example embodiments, the terminal device 110 may schedule the traffic based on the DQTX configurations. The terminal device 110 may select one or more active periods from the at least one active period of the serving beam based on information associated with downlink traffics. Further. the terminal device 110 may transmit an indication of the one or more active periods to the network device. Accordingly, the network device 120 may receive, from the terminal device 110, the indication of the selected one or more active periods. In addition, the network device 120 may further schedule downlink traffics for the terminal device 110 based on the one or more active periods.
[0078] In some embodiments, the terminal device 110 switches between overlapped beams / cells (e.g. beam edges) with DQTX period close to each other.
[0079] FIG. 6 shows such an example, with a configuration 610 for beam / cell 1 and a configuration 620 for beam / cell 2. UEs served by the beam / cell 1 and the beam / cell 2 may operate according to respective configurations.
[0080] The beam / cell DQTX may be used to coordinate NTN terminals with the network as well as different beams / cells provided by one or more satellites. Legacy UEs could still access the beam activated with the beam / cell DQTX. New UEs could maximize the average throughput within a beam by the indicated scheduling. The network could maximize the system throughput by balancing the power / physical resource between beams.
[0081] In this way, the beam edge and UE performance is enhanced. The usage of all the available power and feeder link bandwidth of one satellite is maximized. In addition, latency / delay is shortened due to the round-trip time of RS measurement and CQI feedback.
[0082] In some example embodiments, a transmission cycle of a beam comprises a plurality of active periods corresponding to different QoS levels, respectively. FIG. 7 shows such an example. The DQTX configuration 710 indicates a DQTX cycle including an active period corresponding to one QoS level (denoted as active 1) and an active period corresponding to another QoS level (denoted as active 2) . For example, the network device 120 configures and indicates a list of active periods for one beam / cell with each active period sharing the same DQTX cycle.
[0083] In some example embodiments, a first active period of a first beam and a second active period of a second beam may be at least partially non-overlapped in the time domain. For example, not all the active DQTX periods with a high QoS level of different beams / cells overlap with each other in the time domain.
[0084] In some example embodiments, each active period of the plurality of active periods may be indicated by an offset to the transmission cycle (for example, an offset to a starting point of the transmission cycle) and a time duration of the active period. For example, the active period denoted as “active 1” may indicated by the offset 1 and duration 1, and the active period denoted as “active 2” may be indicated by the offset 2nad duration 2.
[0085] The terminal device 110 may select an active period based on the QoS requirement state, traffic pattern state, and receiver working mode. For example, the active period denoted as active 1 has a higher QoS level than the active period denoted as active 2. The UE 1 selects the active period denoted as “active 1” for normal DL traffic. In contrast, the UE 2 selects the active period denoted as “active 2” for normal DL traffic, for example, in the case that the UE 2 has a stronger capability than the UE 1. The terminal device 110 may determine the reference signal occasion based on the selected active period.
[0086] In some embodiments, the terminal device 110 may enable / disable the HARQ feedback based on the selected DQTX active period. The terminal device 110 may determine that positive feedback to downlink transmission from the serving cell occurs within a third active period of the serving cell. Further, the terminal device 110 may determine that negative feedback to the downlink transmission from the serving cell occurs within a fourth active period of the serving cell, the fourth active period is after the third active period and corresponds to a lower QoS level than the third active period. In addition, if the negative feedback occurs within the fourth active period, the terminal device 110 may disable HARQ feedback to the downlink transmission from the serving cell. For example, as shown in FIG. 7, the active period denoted as active 1 has a higher QoS level than the active period denoted as active 2. In this case, if UE 1 determines ACK feedback within the active period denoted as “active 1” and determines NACK feedback within the active period denoted as “active 2” , the UE 1 may disable HARQ feedback.
[0087] In these embodiments, a DQTX list is used to indicate active DQTX periods with different QoS levels and coordinate DQTX among different beams / cells provided by one satellite. New UEs could adopt the best-suit DQTX to maximize the average throughput. The network could provide flexible configuration to meet the needs of UEs in different beams / cells under power and bandwidth constraints.
[0088] In this way, the system performance under power and / or feeder linker constraints is maximized. Further, the performance of each type of terminal is maximized.
[0089] In some example embodiments, a configuration for a beam may indicate that a transmission cycle of the beam comprises a plurality of active periods, and an active period corresponding to a first QoS level may be located within an active period corresponding to a second QoS level lower than the first QoS level. FIG. 8 shows such an example. The DQTX configuration 810 indicates a DQTX cycle including an active period 811 corresponding to the first QoS level and an active period 812 corresponding to a second QoS level lower than the first QoS level. The active period 811 is located within the active period 812. The active period of a DQTX cycle with a higher QoS level is always within an active period of the DQTX cycle with a lower QoS level.
[0090] Alternatively, the active period 812 may be replaced by a non-active period, which means that an active period may be located within a non-active period. Within the duration over which the two periods are overlapped, transmission corresponding to the higher QoS level may be performed. In these embodiments, the multiple DQTX active periods may be nested from the highest QoS level to the lowest QoS level or to a period without QoS.
[0091] In some example embodiments, each active period of the plurality of active periods may be indicated by an offset to the transmission cycle and a time duration of the active period. For example, the active period 811 may be indicated by offset 1 and duration 1, and the active period 812 may be indicated by offset 2 and duration 2.
[0092] In some example embodiments, each active period of the plurality of active periods may be indicated by a time duration of the active period and a common offset of an active duration center to the transmission cycle. The active duration center represents a center of a time duration occupied by the plurality of active periods. For example, the center of the active period 812 may be the active duration center. In these embodiments, one offset is used for all different DQTX active periods, thus enabling a more efficient signaling design.
[0093] In some embodiments, the terminal device 110 may select an active period based on the QoS requirement state, traffic pattern state, and receiver working mode. For example, the UE 1 selects the active period 811 for high DL traffic, and the UE 2 may select the active period 812 for medium DL traffic. The terminal device 110 may determine the reference signal occasion based on the selected active period.
[0094] In some embodiments, the terminal device 110 may enable / disable the HARQ feedback based on the selected DQTX active period. The terminal device 110 may determine that positive feedback to downlink transmission from the serving cell occurs within a third active period of the serving cell. Further, the terminal device 110 may determine that negative feedback to the downlink transmission from the serving cell occurs within a fourth active period of the serving cell. The fourth active period is after the third active period and corresponds to a lower QoS level than the third active period. In addition, if the negative feedback occurs within the fourth active period, the terminal device 110 may disable HARQ feedback to the downlink transmission from the serving cell. For example, as shown in FIG. 8, the active period 811 corresponds to a higher QoS level than the active period 812. In this case, if UE 1 determines ACK feedback within the active period 811 and determines NACK feedback within the active period 812, the UE 1 may disable HARQ feedback.
[0095] In these embodiments, the multiple DQTX active periods are nested from the highest QoS level to the lowest QoS level or no QoS. Legacy UEs could have the opportunity to smoothly adjust its downlink without losing too much performance. The network could adjust its power amplifiers (PA) more efficiently. New UEs could schedule the traffic without unnecessary bursts.
[0096] In this way, the burst is smoothed since new UEs could schedule / be configured with the traffic in continued varying states, and it is more friendly to legacy UEs which rely on RS measurement and CQI report.
[0097] In some example embodiments, the network device 120 may perform Synchronization Signal / physical broadcast channel block (SSB) transmission based on the at least one configuration.
[0098] In some example embodiments, a transmission parameter used by the network device during a non-active period of a beam may be determined to meet a synchronizing requirement of terminal devices served by the network device. For example, the network device 120 adjusts the beam / cell to make the SSB under the inactive period of all DQTX configurations to meet the downlink synchronizing requirements of all the NTN terminals in R-19 and earlier releases.
[0099] In some example embodiments, a transmission parameter used by the network device during an active period of a beam may be determined to meet a synchronizing requirement of a terminal device with a reduced capability. For example, the network device 120 adjusts the beam / cell to make the SSB under the active period of certain DQTX configurations to meet the minimal synchronizing requirements of a particular capability-reduced NTN terminal in future releases. In this way, both backward compatibility and upward compatibility can be ensured.
[0100] In these embodiments, the SSB follows the DQTX configuration and meets the minimal synchronizing requirements of all the NTN terminals in Rel-19 and earlier releases under the inactive period of all the DQTX configuration. Network backward supports UE in Rel-19 and earlier release. Network upward supports new UEs in future releases (e.g. reduced capability UE) by the high QoS Level DQTX.
[0101] In some example embodiments, the terminal device 110 may transmit, to the network device 120, assistant information associated with a receiver of the terminal device 110. Accordingly, the network device 120 may receive respective assistant information from a plurality of terminal devices. Further, the network device 120 may determine a rule for coordinating transmission capacities and resources among the at least one beam.
[0102] In some example embodiments, the at least one configuration described above may be determined based on the rule.
[0103] In an example, the terminal device 110 reports semi-static assistant information to the network to assist the network in coordinating the power, beam size, and bandwidth among the beams provided by one satellite. Further, the network device 120 analyses the assistant information from all the terminals under one satellite, then coordinates a rule for all the beams / cells provided by one satellite to share the limited power and feeder link bandwidth by adjusting the beam power, beam size, and beam bandwidth.
[0104] In these embodiments, terminal devices report semi-static assistant information, representing the receiver sensitivity of a terminal device, for the network to coordinate the power, beam size, and bandwidth among the beams provided by one satellite. With this semi-static assistant information reported from the terminal devices, the network device could schedule the power, beam size, and bandwidth or the DQTX among the beams / cells provided by one satellite without frequency signaling interaction, which shortens the latency, enhances the overall system performance under the power and feeder link bandwidth constraints.
[0105] In this way, the coordination rule could meet the needs of all the terminal devices in a time-division manner. The latency and signaling can get rid of due to the legacy sending reference signaling, measurement, and reporting procedure in the legacy adaptive modulation and coding procedure. In addition, the rule as the satellite moves around the earth with stored assistant information can be updated by the network without additional signaling interaction with terminals.
[0106] FIG. 9A and FIG. 9B illustrate the key points to determine the maximum serving time of one beam or one satellite under earth-fixed cell (from t0 to t1) and earth-moving cell (from t2 to t3) , respectively. The determination of t1-t0 and t3-t2 is based on the beam diameter and elevation angle assumptions in 3GPP TR 38.821.
[0107] Under the earth-fixed cell circumstance, the E0 and E1 positions are constrained by both the elevation angle and the beam diameter to calculate the one beam serving time; and the E0 and E1 positions are constrained by the far edge beam elevation angle to calculate the one satellite serving time.
[0108] Under the earth-moving cell circumstance, the E2 and E4 positions are constrained by both the elevation angle and the beam diameter to calculate the one beam serving time; and the E2 and E4 positions are constrained by the edge beam elevation angle to calculate the one satellite serving time.
[0109] The calculation results are summarized in Table 5. The minimal value of one beam serving time is 7.2s and the minimal value of one satellite serving time is 123.4s.
[0110] Table 5
[0111] As can be seen from the above calculation, the serving time of one satellite can support the DQTX as described above.
[0112] Some embodiments are described above. Now some more examples are now given.
[0113] In an example, a new DCI format which is denoted as 2_X may be introduced, as shown in Table 6 and Table 7.
[0114] Table 6
[0115] Table 7
[0116] In an example, cell operation may be adapted, as shown in Table 8 and Table 9.
[0117] Table 8
[0118] Table 9
[0119] In an example, Channel quality indicator (CQI) may be as shown in Table 10.
[0120] Table 10
[0121] In an example, CSI-RS reception procedure may be as shown in Table 11.
[0122] Table 11
[0123] In an example, CSI reference resource definition may be as shown in Table 12.
[0124] Tabel 12
[0125] In an example, energy saving may be shown as in Table 13.
[0126] Table 13
[0127] In an example, parameters may be shown as in Table 14.
[0128] Table 14
[0129] It is to be noted that the DQTX / DQRX described above may be applied at the terminal device. For example, the network device may configure the terminal device with DQTX, and the terminal device may adjust its QoS level for transmissions accordingly.
[0130] FIG. 10 illustrates a flowchart of a communication method 1000 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1000 will be described from the perspective of the network device in FIG. 1.
[0131] At block 1010, the network device determines at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively.
[0132] At block 1020, the network device transmits the at least one configuration to a terminal device.
[0133] In some example embodiments, a QoS level comprises at least one of: a transmission power level, a transmission bandwidth size, or a beam size.
[0134] In some example embodiments, the at least one configuration indicates at least one of: that respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain, an active period being a transmission period corresponding to a QoS level higher than a threshold, that the at least one beam has the same transmission cycle, that respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle, or that respective active periods of neighboring beams are adjacent to each other in time domain.
[0135] In some example embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods corresponding to different QoS levels, respectively, an active period being a transmission period corresponding to a QoS level higher than a threshold.
[0136] In some example embodiments, each active period of the plurality of active periods is indicated by an offset to the transmission cycle and a time duration of the active period.
[0137] In some example embodiments, a first active period of a first beam and a second active period of a second beam are at least partially non-overlapped in time domain.
[0138] In some example embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods, an active period being a transmission period corresponding to a QoS level higher than a threshold, and an active period corresponding to a first QoS level is located within an active period corresponding to a second QoS level lower than the first QoS level.
[0139] In some example embodiments, each active period of the plurality of active periods is indicated by at least one of: an offset to the transmission cycle and a time duration of the active period, or a time duration of the active period and a common offset of an active duration center to the transmission cycle, the active duration center representing a center of a time duration occupied by the plurality of active periods.
[0140] In some example embodiments, the network device may perform Synchronization Signal / physical broadcast channel block (SSB) transmission based on the at least one configuration.
[0141] In some example embodiments, a transmission parameter used by the network device during a non-active period of a beam is determined to meet a synchronizing requirement of terminal devices served by the network device, the non-active period being a transmission period corresponding to a QoS level lower than a threshold, and / or a transmission parameter used by the network device during an active period of a beam is determined to meet a synchronizing requirement of a terminal device with a reduced capability.
[0142] In some example embodiments, the network device may receive respective assistant information from a plurality of terminal devices, assistant information from each terminal device being associated with a receiver of the terminal device; and determine a rule for coordinating transmission capacities and resources among the at least one beam.
[0143] In some example embodiments, the at least one configuration is determined based on the rule.
[0144] In some example embodiments, the network device may receive, from the terminal device, an indication of one or more active periods selects from the at least one active period of a serving beam of the terminal device; and schedule downlink traffics for the terminal device based on the one or more active periods.
[0145] FIG. 11 illustrates a flowchart of a communication method 1100 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1100 will be described from the perspective of the terminal device in FIG. 1.
[0146] At block 1110, the terminal device receives, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively.
[0147] At block 1120, the terminal device performs downlink reception from the network device based on a configuration of a serving beam of the at least one beam.
[0148] In some example embodiments, a QoS level comprises at least one of: a transmission power level, a transmission bandwidth size, or a beam size.
[0149] In some example embodiments, the at least one configuration indicates at least one of: that respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain, an active period being a transmission period corresponding to a QoS level higher than a threshold, that the at least one beam has the same transmission cycle, that respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle, or that respective active periods of neighboring beams are adjacent to each other in time domain.
[0150] In some example embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods corresponding to different QoS levels, respectively, an active period being a transmission period corresponding to a QoS level higher than a threshold.
[0151] In some example embodiments, each active period of the plurality of active periods is indicated by an offset to the transmission cycle and a time duration of the active period.
[0152] In some example embodiments, a first active period of a first beam and a second active period of a second beam are at least partially non-overlapped in time domain.
[0153] In some example embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods, an active period being a transmission period corresponding to a QoS level higher than a threshold, and an active period corresponding to a first QoS level is located within an active period corresponding to a second QoS level lower than the first QoS level.
[0154] In some example embodiments, each active period of the plurality of active periods is indicated by at least one of: an offset to the transmission cycle and a time duration of the active period, or a time duration of the active period and a common offset of an active duration center to the transmission cycle, the active duration center representing a center of a time duration occupied by the plurality of active periods.
[0155] In some example embodiments, the terminal device may measure Synchronization Signal / physical broadcast channel block (SSB) from the serving beam based on the at least one configuration.
[0156] In some example embodiments, a transmission parameter used by the network device during a non-active period of a beam is determined to meet a synchronizing requirement of terminal devices served by the network device, and / or a transmission parameter used by the network device during an active period of a beam is determined to meet a synchronizing requirement of a terminal device with a reduced capability.
[0157] In some example embodiments, the terminal device may transmit, to the network device, assistant information associated with a receiver of the terminal device.
[0158] In some example embodiments, the terminal device may select one or more active periods from the at least one active period of the serving beam based on information associated with downlink traffics; and transmit an indication of the one or more active periods to the network device.
[0159] In some example embodiments, the terminal device may in accordance with a determination that negative feedback to downlink transmission from the serving cell occurs within a non-active period of the serving cell, disable Hybrid Automatic Repeat Request (HARQ) feedback to the downlink transmission from the serving cell.
[0160] In some example embodiments, the terminal device may determine that positive feedback to downlink transmission from the serving cell occurs within a third active period of the serving cell; determine that negative feedback to the downlink transmission from the serving cell occurs within a fourth active period of the serving cell, the fourth active period is after the third active period and corresponds to a QoS level lower than the third active period; and in accordance with a determination that the negative feedback occurs within the fourth active period, disable HARQ feedback to the downlink transmission from the serving cell.
[0161] The satellite may report the out-of-service time of certain geography areas to the core network. The out-of-service time may be due to the power limits of a satellite or the feeder link bandwidth limits of a satellite or a gateway / ground station. The core network could deal with communication issues like paging.
[0162] FIG. 12 is a simplified block diagram of a device 1200 that is suitable for implementing embodiments of the present disclosure. The device 1200 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1200 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0163] As shown, the device 1200 includes a processor 1210, a memory 1220 coupled to the processor 1210, a suitable transceiver 1240 coupled to the processor 1210, and a communication interface coupled to the transceiver 1240. The memory 1220 stores at least a part of a program 1230. The transceiver 1240 may be for bidirectional communications, or a unidirectional communication based on requirements. The transceiver 1240 may include at least one of a transmitter 1242 and a receiver 1244. The transmitter 1242 and the receiver 1244 may be functional modules or physical entities. The transceiver 1240 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S 1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0164] The program 1230 is assumed to include program instructions that, when executed by the associated processor 1210, enable the device 1200 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 12. The embodiments herein may be implemented by computer software executable by the processor 1210 of the device 1200, or by hardware, or by a combination of software and hardware. The processor 1210 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1210 and memory 1220 may form processing means 1250 adapted to implement various embodiments of the present disclosure.
[0165] The memory 1220 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1220 is shown in the device 1200, there may be several physically distinct memory modules in the device 1200. The processor 1210 may be of any type suitable to the local technical network, and may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1200 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0166] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: determine at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and transmit the at least one configuration to a terminal device. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0167] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and perform downlink reception from the network device based on a configuration of a serving beam of the at least one beam. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0168] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0169] According to embodiments of the present disclosure, a network apparatus is provided. The network apparatus comprises means for determining at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and means for transmitting the at least one configuration to a terminal device. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 1000. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0170] According to embodiments of the present disclosure, a terminal apparatus is provided. The terminal apparatus comprises means for receiving, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and means for performing downlink reception from the network device based on a configuration of a serving beam of the at least one beam. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 1100. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 1100. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0171] In summary, embodiments of the present disclosure provide the following aspects.
[0172] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: determine at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and transmit the at least one configuration to a terminal device.
[0173] In some embodiments, a QoS level comprises at least one of: a transmission power level, a transmission bandwidth size, or a beam size.
[0174] In some embodiments, the at least one configuration indicates at least one of: that respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain, an active period being a transmission period corresponding to a QoS level higher than a threshold, that the at least one beam has the same transmission cycle, that respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle, or that respective active periods of neighboring beams are adjacent to each other in time domain.
[0175] In some embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods corresponding to different QoS levels, respectively, an active period being a transmission period corresponding to a QoS level higher than a threshold.
[0176] In some embodiments, each active period of the plurality of active periods is indicated by an offset to the transmission cycle and a time duration of the active period.
[0177] In some embodiments, a first active period of a first beam and a second active period of a second beam are at least partially non-overlapped in time domain.
[0178] In some embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods, an active period being a transmission period corresponding to a QoS level higher than a threshold, and an active period corresponding to a first QoS level is located within an active period corresponding to a second QoS level lower than the first QoS level.
[0179] In some embodiments, each active period of the plurality of active periods is indicated by at least one of: an offset to the transmission cycle and a time duration of the active period, or a time duration of the active period and a common offset of an active duration center to the transmission cycle, the active duration center representing a center of a time duration occupied by the plurality of active periods.
[0180] In some embodiments, the network device is further caused to: perform Synchronization Signal / physical broadcast channel block (SSB) transmission based on the at least one configuration.
[0181] In some embodiments, a transmission parameter used by the network device during a non-active period of a beam is determined to meet a synchronizing requirement of terminal devices served by the network device, the non-active period being a transmission period corresponding to a QoS level lower than a threshold, and / or a transmission parameter used by the network device during an active period of a beam is determined to meet a synchronizing requirement of a terminal device with a reduced capability.
[0182] In some embodiments, the network device is further caused to: receive respective assistant information from a plurality of terminal devices, assistant information from each terminal device being associated with a receiver of the terminal device; and determine a rule for coordinating transmission capacities and resources among the at least one beam.
[0183] In some embodiments, the at least one configuration is determined based on the rule.
[0184] In some embodiments, the network device is further caused to: receive, from the terminal device, an indication of one or more active periods selects from the at least one active period of a serving beam of the terminal device; and schedule downlink traffics for the terminal device based on the one or more active periods.
[0185] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; and perform downlink reception from the network device based on a configuration of a serving beam of the at least one beam.
[0186] In some embodiments, a QoS level comprises at least one of: a transmission power level, a transmission bandwidth size, or a beam size.
[0187] In some embodiments, the at least one configuration indicates at least one of: that respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain, an active period being a transmission period corresponding to a QoS level higher than a threshold, that the at least one beam has the same transmission cycle, that respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle, or that respective active periods of neighboring beams are adjacent to each other in time domain.
[0188] In some embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods corresponding to different QoS levels, respectively, an active period being a transmission period corresponding to a QoS level higher than a threshold.
[0189] In some embodiments, each active period of the plurality of active periods is indicated by an offset to the transmission cycle and a time duration of the active period.
[0190] In some embodiments, a first active period of a first beam and a second active period of a second beam are at least partially non-overlapped in time domain.
[0191] In some embodiments, a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods, an active period being a transmission period corresponding to a QoS level higher than a threshold, and an active period corresponding to a first QoS level is located within an active period corresponding to a second QoS level lower than the first QoS level.
[0192] In some embodiments, each active period of the plurality of active periods is indicated by at least one of: an offset to the transmission cycle and a time duration of the active period, or a time duration of the active period and a common offset of an active duration center to the transmission cycle, the active duration center representing a center of a time duration occupied by the plurality of active periods.
[0193] In some embodiments, the terminal device is further caused to: measure Synchronization Signal / physical broadcast channel block (SSB) from the serving beam based on the at least one configuration.
[0194] In some embodiments, a transmission parameter used by the network device during a non-active period of a beam is determined to meet a synchronizing requirement of terminal devices served by the network device, and / or a transmission parameter used by the network device during an active period of a beam is determined to meet a synchronizing requirement of a terminal device with a reduced capability.
[0195] In some embodiments, the network device is further caused to: transmit, to the network device, assistant information associated with a receiver of the terminal device.
[0196] In some embodiments, the terminal device is further caused to: select one or more active periods from the at least one active period of the serving beam based on information associated with downlink traffics; and transmit an indication of the one or more active periods to the network device.
[0197] In some embodiments, the terminal device is further caused to: in accordance with a determination that negative feedback to downlink transmission from the serving cell occurs within a non-active period of the serving cell, disable Hybrid Automatic Repeat Request (HARQ) feedback to the downlink transmission from the serving cell.
[0198] In some embodiments, the terminal device is further caused to: determine that positive feedback to downlink transmission from the serving cell occurs within a third active period of the serving cell; determine that negative feedback to the downlink transmission from the serving cell occurs within a fourth active period of the serving cell, the fourth active period is after the third active period and corresponds to a QoS level lower than the third active period; and in accordance with a determination that the negative feedback occurs within the fourth active period, disable HARQ feedback to the downlink transmission from the serving cell.
[0199] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0200] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0201] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0202] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0203] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0204] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0205] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor, or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques, or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0206] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 12. 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.
[0207] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0208] The above program code may be embodied on a machine-readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random-access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0209] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0210] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; andperform downlink reception from the network device based on a configuration of a serving beam of the at least one beam.2.The terminal device of claim 1, wherein a QoS level comprises at least one of:a transmission power level,a transmission bandwidth size, ora beam size.3.The terminal device of claim 1, wherein the at least one configuration indicates at least one of:that respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain, an active period being a transmission period corresponding to a QoS level higher than a threshold,that the at least one beam has the same transmission cycle,that respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle, orthat respective active periods of neighboring beams are adjacent to each other in time domain.4.The terminal device of claim 1, wherein a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods corresponding to different QoS levels, respectively, an active period being a transmission period corresponding to a QoS level higher than a threshold.5.The terminal device of claim 4, wherein each active period of the plurality of active periods is indicated by an offset to the transmission cycle and a time duration of the active period.6.The terminal device of claim 4, wherein a first active period of a first beam and a second active period of a second beam are at least partially non-overlapped in time domain.7.The terminal device of claim 1, wherein a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods, an active period being a transmission period corresponding to a QoS level higher than a threshold, andan active period corresponding to a first QoS level is located within an active period corresponding to a second QoS level lower than the first QoS level.8.The terminal device of claim 7, wherein each active period of the plurality of active periods is indicated by at least one of:an offset to the transmission cycle and a time duration of the active period, ora time duration of the active period and a common offset of an active duration center to the transmission cycle, the active duration center representing a center of a time duration occupied by the plurality of active periods.9.The terminal device of claim 1, wherein the terminal device is further caused to:measure Synchronization Signal / physical broadcast channel block (SSB) from the serving beam based on the at least one configuration.10.The terminal device of claim 9, wherein a transmission parameter used by the network device during a non-active period of a beam is determined to meet a synchronizing requirement of terminal devices served by the network device, and / ora transmission parameter used by the network device during an active period of a beam is determined to meet a synchronizing requirement of a terminal device with a reduced capability.11.The terminal device of claim 1, wherein the network device is further caused to:transmit, to the network device, assistant information associated with a receiver of the terminal device.12.The terminal device of claim 1, wherein the terminal device is further caused to:select one or more active periods from the at least one active period of the serving beam based on information associated with downlink traffics; andtransmit an indication of the one or more active periods to the network device.13.The terminal device of claim 1, wherein the terminal device is further caused to:in accordance with a determination that negative feedback to downlink transmission from the serving cell occurs within a non-active period of the serving cell, disable Hybrid Automatic Repeat Request (HARQ) feedback to the downlink transmission from the serving cell.14.The terminal device of claim 4 or 7, wherein the terminal device is further caused to:determine that positive feedback to downlink transmission from the serving cell occurs within a third active period of the serving cell;determine that negative feedback to the downlink transmission from the serving cell occurs within a fourth active period of the serving cell, the fourth active period is after the third active period and corresponds to a QoS level lower than the third active period; andin accordance with a determination that the negative feedback occurs within the fourth active period, disable HARQ feedback to the downlink transmission from the serving cell.15.A network device comprising:a processor configured to cause the network device to:determine at least one configuration for transmission from at least one beam provided by the network device, wherein each configuration of the at least one configuration corresponds to a beam of the at least one beam, and indicates a plurality of transmission periods of the corresponding beam, wherein at least two transmission periods of the plurality of transmission periods corresponds to different Quality of Service (QoS) levels, respectively; andtransmit the at least one configuration to a terminal device.16.The network device of claim 15, wherein a QoS level comprises at least one of:a transmission power level,a transmission bandwidth size, ora beam size.17.The network device of claim 15, wherein the at least one configuration indicates at least one of:that respective active periods of different beams corresponding to the same QoS level are at least partially non-overlapped in time domain, an active period being a transmission period corresponding to a QoS level higher than a threshold,that the at least one beam has the same transmission cycle,that respective active periods of some of different beams corresponding to the same QoS level have different offset from a transmission cycle, orthat respective active periods of neighboring beams are adjacent to each other in time domain.18.The network device of claim 15, wherein a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods corresponding to different QoS levels, respectively, an active period being a transmission period corresponding to a QoS level higher than a threshold.19.The network device of claim 18, wherein each active period of the plurality of active periods is indicated by an offset to the transmission cycle and a time duration of the active period.20.The network device of claim 19, wherein a first active period of a first beam and a second active period of a second beam are at least partially non-overlapped in time domain.21.The network device of claim 15, wherein a configuration of the at least one configuration indicates that a transmission cycle of the corresponding beam comprises a plurality of active periods, an active period being a transmission period corresponding to a QoS level higher than a threshold, andan active period corresponding to a first QoS level is located within an active period corresponding to a second QoS level lower than the first QoS level.22.The network device of claim 21, wherein each active period of the plurality of active periods is indicated by at least one of:an offset to the transmission cycle and a time duration of the active period, ora time duration of the active period and a common offset of an active duration center to the transmission cycle, the active duration center representing a center of a time duration occupied by the plurality of active periods.23.The network device of claim 15, wherein the network device is further caused to:perform Synchronization Signal / physical broadcast channel block (SSB) transmission based on the at least one configuration.24.The network device of claim 23, wherein a transmission parameter used by the network device during a non-active period of a beam is determined to meet a synchronizing requirement of terminal devices served by the network device, the non-active period being a transmission period corresponding to a QoS level lower than a threshold, and / ora transmission parameter used by the network device during an active period of a beam is determined to meet a synchronizing requirement of a terminal device with a reduced capability.25.The network device of claim 15, wherein the network device is further caused to:receive respective assistant information from a plurality of terminal devices, assistant information from each terminal device being associated with a receiver of the terminal device; anddetermine a rule for coordinating transmission capacities and resources among the at least one beam.26.The network device of claim 25, wherein the at least one configuration is determined based on the rule.27.The network device of claim 25, wherein the network device is further caused to:receive, from the terminal device, an indication of one or more active periods select from the at least one active period of a serving beam of the terminal device; andschedule downlink traffics for the terminal device based on the one or more active periods.