Resource switching method for wireless communication

Abstract

A method of wireless communication for use in a wireless terminal is disclosed. The method includes receiving downlink control information from a wireless network node based on an identifier of a set of wireless terminals, wherein the downlink control information includes at least one set of beam resource related indications.

Description

Technical Field

[0001] This article generally relates to wireless communication, and specifically to a resource switching method for wireless communication. Background Technology

[0002] With the development of New Radio (NR) access technology (i.e., 5G), a wide range of use cases have been realized, including enhanced mobile broadband, Massive Machine-Type Communications (MTC), and critical MTC. To expand the utilization of NR access technology, 5G connectivity via satellite is considered a promising application. In contrast to terrestrial networks where all communication nodes (e.g., base stations) are located on Earth, wireless communication networks that combine satellites and / or aircraft to perform some or all of the functions of terrestrial base stations are called non-terrestrial networks (NTN).

[0003] In NTN, satellite coverage is typically implemented using multiple beams. A satellite's beam changes its service area on the ground as it moves along its orbit. To achieve high throughput, resources (e.g., frequency / time / polarization) between beams are often reused. For fixed user equipment (UE), a fixed UE is served by different beams over time, and the UE needs to switch to different resources of the corresponding serving beam.

[0004] Satellite coverage is typically much larger than that of terrestrial cells. For example, the diameter of the coverage area of ​​a single satellite beam can be hundreds of kilometers or even larger. Within this vast coverage area, the number of UEs is also very large. If the network notifies each UE of changes in service resources, the signaling overhead will be very high due to the large number of UEs within the coverage area. Summary of the Invention

[0005] This document relates to methods, systems, and apparatuses for wireless communication, and more particularly to methods, systems, and apparatuses for resource switching in wireless communication.

[0006] This disclosure relates to a wireless communication method used in a wireless terminal. The method includes receiving downlink control information from a wireless network node based on a set of identifiers for the wireless terminals, wherein the downlink control information includes at least one set of beam resource correlation indications.

[0007] Various embodiments may preferably implement the following features:

[0008] Preferably, the wireless communication method further includes applying at least one beam resource from the beam resource correlation indication set corresponding to the wireless terminal in the at least one beam resource correlation indication set to communication with the wireless network node.

[0009] Preferably, the group of wireless terminals includes all wireless terminals in the serving cell of the wireless network node.

[0010] Preferably, the group of wireless terminals is one of multiple groups of wireless terminals in the serving cell of the wireless network node.

[0011] Preferably, the identifier is calculated based on the group index of the wireless terminal.

[0012] Preferably, the downlink control information includes a group index associated with at least one set of beam resource-related indications.

[0013] Preferably, the group index is mapped to a sequence of at least one set of beam resource-related indicators.

[0014] Preferably, the beam resource related indication set includes at least one of a frequency resource identifier, a transmission configuration indication (TCI) status identifier, a carrier frequency offset, or a polarization indicator.

[0015] Preferably, the beam resource related indication set includes frequency resource identifiers, wherein the method further includes performing communication by using frequency resources corresponding to the frequency resource identifiers.

[0016] Preferably, the beam resource associated indication set includes TCI status identifiers, and the method further includes at least one of the following:

[0017] The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the reception of at least one of the following: physical downlink control channel, physical downlink shared channel, periodic channel state information reference signal, semi-persistent channel state information reference signal, access point channel state information reference signal, or demodulation reference signal.

[0018] The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the transmission of at least one of the following: the sounding reference signal, the physical uplink control channel, the physical uplink shared channel, or the physical random access channel; or

[0019] Communication is performed using the same frequency resources associated with the reference signal included in the configuration corresponding to the TCI state identifier.

[0020] Preferably, the beam resource-related indication set includes a carrier frequency offset, and the method further includes performing communication by applying synchronization based on the carrier frequency offset.

[0021] Preferably, the beam resource-related indication set includes polarization indicators, and the method further includes performing communication by using the polarization indicated by the polarization indicators.

[0022] Preferably, the downlink control information is one of the following: a new wireless downlink control information format, a narrowband Internet of Things downlink control information format, or an enhanced machine-type communication downlink control information format.

[0023] Preferably, downlink control information is received in time slot n, where n is an integer, and the method further includes at least one of the following:

[0024] Monitoring downlink transmissions on at least one beam resource in the beam resource related indication set corresponding to the wireless terminal at a time no earlier than time slot (n+m), where m is an integer determined based on the wireless terminal's ability to switch the at least one beam resource, or

[0025] Uplink transmission is transmitted on at least one beam resource in the beam resource related indication set corresponding to the wireless terminal at a time no earlier than time slot (n+K_offset+l), where l is an integer determined based on the wireless terminal's ability to switch the at least one beam resource, and K_offset refers to an additional scheduling offset configured by the wireless network node.

[0026] Preferably, the wireless communication method further includes:

[0027] A handover request is received from a wireless network node, the handover request indicating that at least one beam resource from the beam resource related indication set corresponding to the wireless terminal in the at least one beam resource related indication set be applied to the timing of communication, and

[0028] The timing application corresponds to at least one beam resource in the beam resource related indication set of the wireless terminal.

[0029] The handover request is received by means of wireless terminal-specific downlink control information configured for the wireless terminal or by the latest handover request received from the wireless network node.

[0030] Preferably, at least one beam resource related indication set is associated with at least one of the uplink or downlink communications.

[0031] This disclosure relates to a wireless communication method used in a wireless network node. The method includes transmitting downlink control information to wireless terminals based on a set of identifiers for those terminals, wherein the downlink control information includes at least one set of beam resource correlation indications.

[0032] Various embodiments may preferably implement the following features:

[0033] Preferably, the wireless communication method further includes applying at least one beam resource from the beam resource correlation indication set corresponding to the wireless terminal in the at least one beam resource correlation indication set to the communication with the wireless terminal.

[0034] Preferably, the group of wireless terminals includes all wireless terminals in the serving cell of the wireless network node.

[0035] Preferably, the group of wireless terminals is one of multiple groups of wireless terminals in the serving cell of the wireless network node.

[0036] Preferably, the identifier is calculated based on the group index associated with the wireless terminal.

[0037] Preferably, the downlink control information includes a group index associated with at least one set of beam resource-related indications.

[0038] Preferably, the group index is mapped to a sequence of at least one set of beam resource-related indicators.

[0039] Preferably, the beam resource related indication set includes at least one of a frequency resource identifier, a transmission configuration indication (TCI) status identifier, and a carrier frequency offset or polarization indicator.

[0040] Preferably, the beam resource related indication set includes frequency resource identifiers, and the method further includes performing communication with a wireless terminal by using frequency resources corresponding to the frequency resource identifiers.

[0041] Preferably, the beam resource associated indication set includes TCI status identifiers, and the method further includes at least one of the following:

[0042] The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the transmission of at least one of the following: physical downlink control channel, physical downlink shared channel, periodic channel state information reference signal, semi-persistent channel state information reference signal, access point channel state information reference signal, or demodulation reference signal.

[0043] The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the reception of at least one of the sounding reference signal, physical uplink control channel, physical uplink shared channel, or physical random access channel, or

[0044] Communication with the wireless terminal is performed by using the same frequency resources associated with the reference signal included in the configuration corresponding to the TCI state identifier.

[0045] Preferably, the beam resource-related indication set includes a carrier frequency offset, and the method further includes performing communication by applying synchronization based on the carrier frequency offset.

[0046] Preferably, the beam resource-related indication set includes polarization indicators, and the method further includes performing communication by using the polarization indicated by the polarization indicators.

[0047] Preferably, the downlink control information is one of the following: a new wireless downlink control information format, a narrowband Internet of Things downlink control information format, or an enhanced machine-type communication downlink control information format.

[0048] Preferably, at least one beam resource from the beam resource correlation indication set corresponding to the wireless terminal is applied in time slot i, where i is an integer, and the method further includes transmitting downlink control information no later than time slot (ij), where j is an integer determined based on the longest propagation delay of the group of wireless terminals.

[0049] Preferably, the wireless communication method includes:

[0050] A handover request is transmitted to a wireless terminal, the handover request indicating that at least one beam resource from the at least one beam resource related to the wireless terminal's beam resource related indication set be applied to the timing of communication, and

[0051] The timing application corresponds to at least one beam resource in the beam resource related indication set of the wireless terminal.

[0052] The handover request is transmitted through wireless terminal-specific downlink control information configured for the wireless terminal or through the latest handover request transmitted to the wireless terminal.

[0053] Preferably, the at least one beam resource related indication set is associated with at least one of the uplink or downlink communications.

[0054] This disclosure relates to a wireless terminal. The wireless terminal includes a communication unit configured to receive downlink control information from a wireless network node based on a set of wireless terminal identifiers, wherein the downlink control information includes at least one set of beam resource related indications.

[0055] Various embodiments may preferably implement the following features:

[0056] Preferably, the wireless terminal further includes a processor configured to perform any of the aforementioned wireless communication methods.

[0057] This disclosure relates to a wireless network node. The wireless network node includes a communication unit configured to transmit downlink control information to wireless terminals based on a set of identifiers of wireless terminals, wherein the downlink control information includes at least one set of beam resource related indications.

[0058] Various embodiments may preferably implement the following features:

[0059] Preferably, the wireless network node further includes a processor configured to perform any of the aforementioned wireless communication methods.

[0060] This disclosure relates to a computer program product including computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to perform the wireless communication method described in any of the foregoing methods.

[0061] The exemplary embodiments disclosed herein are intended to provide features that will become apparent from the following description taken in conjunction with the accompanying drawings. Exemplary systems, methods, apparatuses, and computer program products are disclosed herein according to various embodiments. However, it should be understood that these embodiments are presented by way of example and not limitation, and various modifications to the disclosed embodiments will be apparent to those skilled in the art who have read this disclosure without departing from its scope.

[0062] Therefore, this disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Furthermore, the specific order and / or hierarchy of steps in the methods disclosed herein are merely exemplary methods. Without departing from the scope of this disclosure, the specific order or hierarchy of steps in the disclosed methods or processes may be rearranged based on design preferences. Therefore, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or actions in an exemplary order, and unless explicitly stated otherwise, this disclosure is not limited to the specific order or hierarchy presented.

[0063] The above and other aspects and embodiments thereof are described in more detail in the accompanying drawings, description and claims. Attached Figure Description

[0064] Figure 1 A schematic diagram of beams and cells in a novel wireless system according to an embodiment of the present disclosure is shown;

[0065] Figure 2 A schematic diagram of a frequency reuse scheme in a high-throughput satellite system according to an embodiment of the present disclosure is shown;

[0066] Figure 3A schematic diagram illustrating the mapping between beams and bandwidth slicing according to an embodiment of the present disclosure is shown;

[0067] Figure 4 A schematic diagram of time-based resource switching according to an embodiment of the present disclosure is shown;

[0068] Figure 5 A schematic diagram illustrating resource indications according to an embodiment of this disclosure is shown;

[0069] Figure 6 A schematic diagram illustrating resource indications according to an embodiment of this disclosure is shown;

[0070] Figure 7 A flowchart of a method according to an embodiment of this disclosure is shown;

[0071] Figure 8 A flowchart of a method according to an embodiment of this disclosure is shown;

[0072] Figure 9 An example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure is shown;

[0073] Figure 10 An example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure is shown. Detailed Implementation

[0074] This disclosure proposes a method for switching transmission resources to reduce the corresponding signaling overhead in NTN scenarios.

[0075] The proposed method may include at least one of the following features:

[0076] 1. Define a new N-RNTI or N-RNTI-groupx for resource handover based on common downlink control information (DCI).

[0077] 2. Describes new content in the public DCI with CRC, which is scrambled by the new N-RNTI / N-RNTI-groupx to support group resource switching. The new content may include group index, Bandwidth Part (BWP) Identifier (ID), Transmission Configuration Indication (TCI) status ID, Carrier Frequency Offset (CFO) indicator, and polarization indicator.

[0078] 3. The timing of resource handover indication on the base station (BS) side can take into account propagation delay, and the resource handover delay applied on the UE side should take into account UE capabilities.

[0079] 4. Uplink (UL) and downlink (DL) resource switching can be performed together in a single public DCI.

[0080] The following example illustrates the introduction of beamforming and BWP in an NR system.

[0081] In NR systems, beaming is involved due to the use of high frequencies. Beams may not be indicated by an explicit ID and can be reflected in many aspects such as the Synchronization Signal Block (SSB), Channel State Information-reference signal (CSI-RS), and other similar reference signals.

[0082] In NR systems, BWP enables UEs with small-bandwidth transceivers to communicate with BSs with large system bandwidth. BWP handover can be performed in at least one of the following ways:

[0083] A. Radio Resource Control (RRC) reconfiguration;

[0084] B.bwp inactive timer;

[0085] C. Physical DL Control Channel (PDCCH) DCI format 0_1 ​​or 1_1; or

[0086] D. Backoff based on the Random Access Channel (RACH).

[0087] The following describes beam deployment in current NR and High Throughput Satellite (HTS) systems.

[0088] In NR systems, a cell can have a single beam or multiple beams, such as Figure 1As shown, each circle represents the service area (e.g., a cell) of a beam. In (a), the movement of a UE between beams marked by the Physical Cell ID (PCI) 1 can be handled via intra-cell beam handover, which involves physical layer signaling. In (b), the movement of a UE between beams causes inter-cell handover, which involves higher signaling costs, including those at the physical layer and higher layers.

[0089] In HTS systems, frequencies are reused, for example... Figure 2 The four-color reuse shown is a common method to improve efficiency. Due to satellite movement, over time, a fixed UE will be powered by satellites with different frequencies (e.g., Figure 2 The different beam services shown are for frequencies freq1, freq2, freq3, and freq4. In this case, an appropriate relationship between cell / beam / frequency is needed to save signaling costs in mobility management. Furthermore, time and polarization can also be used in resource reuse schemes.

[0090] From the perspective of signaling costs in mobility management in NTN scenarios, beam switching (e.g., Figure 1 (a) may be more than a handover (e.g., Figure 1 (b) A better option. On the other hand, to achieve high efficiency, frequency reuse can be used in NTN deployments (e.g., Figure 2 In short, in typical NTN applications, beam switching and resource (e.g., frequency and / or time / polarization) changes may occur simultaneously. Coordination between beam switching and resource changes can be supported by bundling beams and resources. For example, Figure 3 The document provides a typical example of four-color frequency reuse and corresponding BWP mapping for NR NTN scenarios. Similarly, Figure 3 The BWPs shown (i.e., BWP 1, BWP 2, BWP 3, and BWP 4) can be replaced by carriers in other wireless communication systems (e.g., anchored and non-anchored carriers in Narrowband Internet of Things (NB-IoT)) or (narrowband in Enhanced Machine Type Communication (eMTC)).

[0091] In this disclosure, the resource types used in the communication system include at least one of the following:

[0092] 1. Spatial domain resources, such as beams. The beam identifier (ID) also includes beam-specific reference signals, antenna ports, quasi-co-location configurations, and precoders.

[0093] 2. Frequency domain resources, such as a portion of available bandwidth (e.g., BWP), or anchored / non-anchored carriers in NB-IoT, or different narrowbands in eMTC.

[0094] 3. Temporal resources, such as different frames / slots.

[0095] 4. Polarization domain resources, such as left-hand circular polarization (LHCP) or right-hand circular polarization (RHCP).

[0096] In this disclosure, switching between resource sets includes at least one of the following:

[0097] 1. Switch to a single resource type, for example:

[0098] A. Switching from one beam to another means that the UE changes the specific beam reference signal it monitors or receives / transmits signaling with different quasi-co-address indications.

[0099] B. Switching between carriers (including different BWPs, anchored / non-anchored carriers, or narrowband) means that the UE changes the frequency domain resources it uses.

[0100] C. Switching from LHCP to RHCP means that the UE changes its transmit / receive polarization type.

[0101] 2. Switch between multiple resource types, for example:

[0102] A. Resource Association: Associate at least two resources (e.g., beam and BWP) together, and a switch in one of the associated resources triggers a switch in all associated resources. This association can be achieved in the following ways:

[0103] a) Includes an index of one type of resource as part of the configuration parameters for another type of resource; and

[0104] b) Use additional parameters to indicate resource association relationships.

[0105] B. Configuration via resource sets: For example, one resource set A includes beam 1 and BWP 2, and another resource set B includes beam 2 and BWP 3. Switching from resource set A to resource set B causes a switchover of both the beams and BWPs defined by each resource set.

[0106] In this disclosure, the group identifier (ID) may be equal to the group index.

[0107] Example 1: Public DCI for resource switching

[0108] Case 0: Grouping Method

[0109] 1. Time-based resource switching

[0110] For satellites / High Attitude PseudoSatellites (HAPS) with fixed Earth beams, the controllable serving beam provides a relatively long service link duration. The service duration of the beam is pre-calculated by the base station (BS) as a time interval [T_xx1, T_xx2], where xx refers to the satellite index. Because beam switching occurs in T_xx2, all UEs in the current service area of ​​the corresponding beam should be notified, for example, to perform a beam switch.

[0111] Figure 4 A schematic diagram illustrating time-based resource switching according to an embodiment of this disclosure is shown. Figure 4 In this configuration, satellite index 1 (i.e., satellite 1) has a service time interval of [T_11, T_12] for beam 2. After T_12, a new satellite index 2 (i.e., satellite 2) takes over beam 2 with a new service time interval [T_21, T_22]. In one embodiment, it is assumed that for beam 2, satellite 1 uses resource (set) 1, and satellite 2 uses resource (set) 2. In this case, during the service time interval [T_11, T_12] of satellite 1, the time intervals [T_11, T_12], [T_21, T_22], resource 1, and resource 2 are indicated to the UE in the service area of ​​beam 2.

[0112] In this scenario, all UEs within the service area of ​​beam 2 switch their resources as a group. The NTN common RNTI (N-RNTI) can be defined as the group ID of all UEs within the service area of ​​a single given beam.

[0113] 2. Location-based resource switching

[0114] For satellite / HAPS systems with Earth-Moving Beams, the beam scans the service area as the satellite moves. UEs within that service area gradually switch to the next beam. Therefore, UEs within the service area can be grouped and switched on a group-by-group basis.

[0115] If a UE with Global Navigation Satellite System (GNSS) capability reports its location to the BS, a group index from the BS can be assigned to that UE for subsequent group-based resource handovers. Under such conditions, an NTN common RNTI (N-RNTI) can be defined to indicate resource handovers to a group of NTN UEs. The group ID can be included in the downlink control information (DCI) with a Cyclic Redundancy Check (CRC) scrambled by the N-RNTI. Alternatively, the group ID can be implicitly indicated by the N-RNTI itself.

[0116] Case 1: Definition of DCI RNTI

[0117] To perform resource switching, a new DCI can be defined in the NTN scenario.

[0118] Option 1:

[0119] A public RNTI (e.g., N-RNTI) can be defined. For example, FFFD in the current RNTI definition. HEX The reserved value can be defined as a common RNTI. The RNTI definition, including the common RNTI, is shown in the table below:

[0120]

[0121] In this embodiment, all UEs (e.g., UEs in the same service area or serving cell of the beam) monitor the DCI with a CRC scrambled by a predefined N-RNTI. If the service time interval [T_xx1, T_xx2] of the beam is indicated by the BS, the DCI monitoring timing depends on the UE implementation. Note that the DCI monitoring timing should be earlier than T_xx2. The network can also trigger DCI monitoring via RRC configuration to ensure reliable reception of resource handover indications.

[0122] Option 2:

[0123] If the UEs within the service area of ​​a beam are divided into more than one group, a group-specific RNTI can be defined. The group index can be implicitly carried (e.g., indicated) by the corresponding group-specific RNTI. The following table shows examples of four group-specific N-RNTIs (N-RNTI-group1 to N-RNTI-group4):

[0124]

[0125] In this embodiment, the network indicates an RNTI with a value of N-RNTI-groupx (x = 1, 2, 3, or 4) to each UE via RRC configuration, and each UE monitors a DCI with a CRC scrambled by its group-specific N-RNTI. Alternatively or supplementarily, the network indicates a group ID to each UE via RRC configuration, and each UE monitors a DCI with a CRC scrambled by a group-specific N-RNTI calculated based on the group ID.

[0126] In one embodiment, the BS can indicate the DCI monitoring start time along with an RNTI value of N-RNTI-groupx (x = 1, 2, 3, or 4). If the BS indicates the DCI monitoring start time, the DCI monitoring timing is determined based on the UE implementation scheme. Note that the DCI monitoring timing should be earlier than the indicated DCI monitoring start time. Alternatively or supplementarily, the network can also trigger DCI monitoring via RRC configuration to ensure reliable reception of resource handover indications.

[0127] Scenario 2: Content included in DCI

[0128] A specific DCI of NTN may include at least one of the following:

[0129] 1. Group Index

[0130] The group index is configured to the UE via RRC signaling. The group index can use a range of [0, N]. group -1] of |log2(N group )|bit, where N group This refers to the number of UE groups. N group The value depends on the size of the service area of ​​a single beam and the size of the overlap between that beam and adjacent beams. Typically, a few bits (e.g., 2 bits) may be sufficient.

[0131] In one embodiment, if the UE receives a DCI format including group indexes, the UE compares the received group indexes with the group indexes assigned to the UE. If the two group indexes are the same, the UE switches resources to the resource(s) indicated in the DCI. If the two group indexes are different, the UE does not switch resources.

[0132] In another embodiment, if the group index is mapped to a corresponding group-specific RNTI (e.g., N-RNTI-groupx), the UE uses the N-RNTI-groupx corresponding to its group index x to decode the DCI. If the DCI is successfully decoded, the UE switches resources (e.g., beam, BWP, carrier frequency, polarization) to the resources indicated by the decoded DCI. If the DCI cannot be successfully decoded, the UE does not switch resources.

[0133] In another embodiment, the group index is implicitly included in the sequence of resource indicators (e.g., beam, BWP, carrier frequency, polarization), and the UE in the xth group uses the xth element in the sequence of resource indicators to switch resources, where x is the group index of the UE.

[0134] 2. Bandwidth Fragmentation (BWP) Indicator

[0135] In one embodiment, a new BWP index was introduced for resource switching. Figure 5 A schematic diagram illustrating resource indication according to an embodiment of this disclosure is shown. Figure 5 In the DCI, there is a BWP indicator that indicates BWP 2. When the UE receives this DCI, for example, when the group index included in the DCI is equal to its own group index, the UE can switch from the currently used BWP 1 to the BWP 2 indicated by the BWP indicator in the DCI.

[0136] For example, a BS can use a BWP indicator to indicate resource handover for a group of UEs. The BWP indicator can include 0, 1, or 2 bits, based on the number n of DL BWPs configured by the higher layer. BWP,RRC The width of this field is determined by [the specified parameter]. Position, among which It is the floor function, and

[0137] -If n BWP,RRC If n ≤ 3, then n BWP =n BWP,RRC +1, in this case, the BWP indicator is equivalent to the ascending order of the higher-level parameter BWP-ID;

[0138] -otherwise n BWP =n BWP,RRC In this case, the bandwidth fragmentation indicator is defined in the following table:

[0139]

[0140]

[0141] In another example, the BS can use BWP indicators to indicate resource handover between multiple UEs. The BWP indicator can include a sequence of BWP IDs, each BWP ID using 0, 1, or 2 bits, such as the number n of DL BWPs configured by a higher layer. BWP,RRC As determined. UEs in the same group share the same value of n. BWP，RRC The bit width of this field is determined to be... bits, where n BWP As defined above, and N groupIt is a predefined fixed value or provided in the corresponding DCI.

[0142] 3. Transmission Configuration Indicator (TCI) Status ID

[0143] In one embodiment, the BS can use a TCI status ID to indicate resource handover for a group of UEs. The TCI status ID can be 0 or L bits. If the higher-layer parameter tci-PresentInDCI is not enabled and / or the field "BWP Indicator" exists, the TCI status ID uses 0 bits; otherwise, the TCI status ID uses L bits. The bit width L is determined as follows: Position, among which It is the floor function, and n TCI This is the number of TCI states indicated to the UE. UEs in the same group share the same value n. TCI .

[0144] In one example, the BS can use TCI status IDs to indicate resource handover for multiple UEs. The TCI status ID can include a sequence of TCI status IDs, where the sequence uses 0 bits if the higher-layer parameter tci-PresentInDCI is not enabled and / or the field "BWP Indicator" is present; otherwise, the sequence uses L×N. group The bit width L is determined to be... Position, among which It is the floor function, and n TCI N is the number of TCI states indicated to the UE, and N group It is a predefined fixed value or provided in the corresponding DCI. UEs in the group share the same value of n. TCI .

[0145] Note that the TCI status ID configured for this UE (or group of UEs) in the DCI can be applied to multiple channels of this UE (or group of UEs).

[0146] For example, when a UE switches its resources based on a TCI state ID (i.e., corresponding to a TCI state with the configured TCI state ID), the indicated resources (e.g., corresponding to a quasi-co-location QCL assumption of a TCI state with the indicated TCI state ID) can be applied to at least one of its Physical Downlink Control Channel (PDCCH), Period Channel State Information Reference Signal (P-CSI-RS), Semi-Persistent Channel State Information Reference Signal (SP-CSI-RS), Access Point Channel State Information Reference Signal (AP-CSI-RS), or Demodulation Reference Signal (DM-RS), Sounding Reference Signal (SRS), Physical Uplink Control Channel (PUCCH), or Physical Uplink Shared Channel (P-CSI-RS). Transmission of at least one of the following: PUSCH (Physical Random Access Channel) or PRACH (Physical Random Access Channel).

[0147] As an alternative or supplement, when a UE switches its resources based on a TCI state ID (i.e., corresponding to a TCI state (e.g., having) a configured TCI state ID), the frequency resources used in subsequent communications (i.e., transmission / reception) are the same as those used by the reference signal included in the TCI state. The frequency resources used by the reference signal may reside in a BWP different from the currently used BWP. Therefore, resource switching based on a TCI state ID can be a BWP switching.

[0148] In one embodiment, the TCI status configuration can be transmitted via RRC signaling. The TCI status ID can be selected via MACCE signaling. The TCI status can be indicated using a public DCI or a UE-specific DCI.

[0149] 4. Carrier Frequency Offset (CFO) Indicator

[0150] The CFO indicator indicates the offset of the Absolute Radio Frequency Channel Number (ARFCN) used for resource handover, which is the frequency offset that the UE should apply during resource handover and / or radio frequency tuning. Figure 6 A schematic diagram illustrating resource indication according to an embodiment of this disclosure is shown. Figure 6 In the DCI, there is a CFO indicator indicating CFO 1. Based on the indicated CFO 1, the UE switches the frequency resources currently used for communication from frequency freq 1 to another frequency freq 2, where freq 2 = freq 1 + CFO 1. In other words, the UE performs communication (with the BS) by applying synchronization according to the indicated CFO.

[0151] In one embodiment, the BS can use a CFO indicator to indicate resource switching for a group of UEs. The CFO indicator can be bit A, where A is determined by... A definite integer, It is the floor function, and N ARFCN It is the number of absolute radio frequency channel numbers (ARFCNs) covered by the network's system bandwidth.

[0152] In another embodiment, the BS can use a CFO indicator to indicate resource handover for multiple UEs. For example, the CFO indicator may include a sequence of CFOs. Each CFO uses A bits, and the sequence uses A×N. group Bit, and N group It is either a predefined fixed value or provided in the same DCI.

[0153] 5. Polarization indicator

[0154] The polarization indicator specifies the polarization used for resource handover. In other words, the UE performs communication (with the BS) by using the polarization indicated by the polarization indicator.

[0155] In one embodiment, the BS can use a polarization indicator to indicate resource switching for a group of UEs. The polarization indicator can be 1 bit (i.e., indicating LHCP or RHCP).

[0156] In another embodiment, the BS can use polarization indicators to indicate resource handover for multiple UEs. The polarization indicator may include a sequence of polarization indicators. Each polarization indicator uses 1 bit, and the sequence uses 1×N. group Position. N group It is the number of UE groups, and is either a predefined fixed value or provided in the same DCI.

[0157] 6. Preferred Combinations

[0158] In one embodiment, the DCI may include at least one of a group index, a BWP ID, a TCI status ID, a CFO indicator, or a polarization indicator.

[0159] In one embodiment, the DCI may include a group index and at least one of a BWP ID, a TCI status ID, a CFO indicator, or a polarization indicator.

[0160] For example, DCI can include {BWP ID, group index}, {TCI status ID, group index}, {CFO indicator, group index}, or {polarization indicator, group index}.

[0161] Case 3: DCI format

[0162] For different network systems, the DCI format can refer to at least one of (1) DCI format 1_1 for NR, (2) DCI format N2 for NB IoT, (3) DCI format 6-2 for eMTC, or a dedicated DCI format.

[0163] Example 2: Timing in Resource Switching

[0164] Case-0: Timed resource switching

[0165] In NTN scenarios, propagation latency is much greater than in typical TN scenarios. Therefore, propagation latency should be considered during resource switching.

[0166] 1. Time-based methods

[0167] For satellites / HAPS with a fixed Earth beam, the service time of the beam is pre-calculated by the BS as a time interval [T_xx1, T_xx2], where xx is the index of the satellite. This service time interval is indicated in the NTN-specific system information, and resource handover requests are made by the BS no later than the time of the DL slot (for NR-based NTNs) or DL ​​subframe (for NB-IoT and eMTC-based NTNs). Transmission, where n is an integer, and DL slot n or DL ​​subframe n is the time of the resource handover for BS application. It is the floor function, T PropagationDelay It refers to the longest propagation delay from the BS to the farthest UE in a given beam, and T unit This refers to the time unit used in the corresponding system (e.g., time slot or subframe).

[0168] A. For NR-based NTN, T unit It can be T slot(i.e., the period of the time slot). After the UE receives a resource handover request (e.g., via public DCI or UE-specific DCI) in DL time slot n (and / or before) on the current serving cell, the UE follows the DL time slot. DL reference signal on new resources in the monitoring service cell. T BWPswitchDelay The value is determined based on the UE's capabilities and can be inherited from the current NR specification.

[0169] B. For NTN based on NB-IoT and eMTC, T unit It can be T subframe (i.e., the period of the subframe). After the UE receives a resource handover request (via public DCI or UE-specific DCI) in DL subframe n (and / or before) on the serving cell, the UE should be able to... Monitor DL ​​reference signals on new resources in the serving cell. RfreturningTime The value is determined based on the UE's capabilities and can be inherited from the current Long-Term Evolution (LTE) specification.

[0170] 2. Location-based methods

[0171] For satellite / HAPS with Earth-Moving Beams, the BS sends a resource handover request to the UE in packets. The BS should do so no later than the DL time slot (for NR-based NTN) or DL ​​subframe (for NB-IoT-based and eMTC-based NTN). This is a set of UE transmission resource handover requests, where n is an integer, and DL slot n or DL ​​subframe n is the time of the resource handover applied by the BS. It is the floor function, T PropagationDelay It refers to the longest propagation delay from the BS to the farthest UE in a given beam, and T unit This refers to the time unit used in the corresponding system (e.g., time slot or subframe).

[0172] A. For NR-based NTN, T unit It can be T slot (i.e., the period of the time slot). After the UE receives a resource handover request (e.g., via public DCI or UE-specific DCI) in DL time slot n (and / or before) on the current serving cell, the UE follows the DL time slot. DL reference signal on new resources in the monitoring service cell. T BWPswitchDelay The value is determined based on the UE's capabilities and can be inherited from the current NR specification.

[0173] B. For NTN based on NB-IoT and eMTC, T unit It can be Tsubframe (i.e., the period of the subframe). After the UE receives a resource handover request (via public DCI or UE-specific DCI) in DL subframe n (and / or before) on the serving cell, the UE should be able to... DL reference signal on new resources in the monitoring service cell. T RfreturningTime The value is determined based on the UE's capabilities and can be inherited from the current LTE specification.

[0174] Scenario 1: Priority Rule

[0175] In one embodiment, the UE may receive more than one resource handover request (via both the public DCI and the UE-specific DCI) before performing a resource handover. The priority rule for determining which received resource handover request to perform the handover may include at least one of the following:

[0176] A. The UE follows a resource handover request in its UE-specific DCI (e.g., received via the UE-specific DCI). That is, the timing of the resource handover is performed in accordance with the timing indicated by the corresponding UE-specific DCI.

[0177] B. The UE follows the latest resource handover request. The timing of the resource handover is in accordance with the timing indicated by the latest DCI.

[0178] Example 3: Resource Switching

[0179] In NTN scenarios, Frequency Division Duplex (FDD) is a common choice. Note that beam switching may cause DL and UL resource switching. In the current NR specification, DCI format 0_1 ​​and DCI format 1_1 can be used for UL BWP switching or DL ​​BWP switching, respectively. To save signaling costs, DCI format 1_1 messages can indicate ULBWP switching and / or DL ​​BWP switching. Note that DCI format 1_1 can be a public DCI or a UE-specific DCI.

[0180] For common DCI, predefined NTN common RNT I (N-RNT I) can be defined for NTN scenarios. For example, the reserved values ​​of FFFD in the current RNT I definition can be used as shown in the table below.

[0181]

[0182] For NR-based NTN, DCI format 1_1 with CRC scrambled by N-RNTI can include at least one of the following:

[0183] 1. DL BWP Indicator - In one embodiment, the bit width of the DL BWP indicator can be 0, 1, or 2 bits, and is based on the number n of DL BWPs configured by the higher layer. DLBWP, This is determined. The bit width of this field is determined to be... Position, among which It is the floor function, and

[0184] -If n DLBWP, If n ≤ 3, then n DL =n DL, +1, in this case, the DL BWP indicator is equivalent to the ascending order of the higher-level parameter BWP-ID;

[0185] -otherwise n DL =n DL, In this case, the DL BWP indicator is defined in the following table:

[0186]

[0187] 2. UL BWP Indicator - In one embodiment, the bit width of the UL BWP indicator can be 0, 1, or 2 bits, and is determined by the number n of UL BWPs configured at higher levels. ULBWP, This is determined. The bit width of this field is determined to be... Position, among which It is the floor function, and

[0188] -If n ULBWP, If n ≤ 3, then n UL =n UL, +1, in this case, the UL BWP indicator is equivalent to the higher-level parameter BWP-ID in ascending order;

[0189] -otherwise n UL =n UL, In this case, the UL BWP index is defined in the following table:

[0190]

[0191]

[0192] In NTN embodiments based on NB-IoT or eMTC, DCI format N2 or DCI format 6-2 with CRC scrambled by N-RNTI may include:

[0193] 1. CFO_DL – DL frequency offset for ARFCN used in resource handover. CFO DL indicates the DL carrier frequency offset that the UE should apply during resource handover.

[0194] 2. CFO_UL – UL frequency offset for ARFCN used in resource handover. CFO UL indicates the UL carrier frequency offset that the UE should apply during resource handover.

[0195] Figure 7 A flowchart of a method according to an embodiment of this disclosure is shown. Figure 7 The method shown can be used in a wireless terminal (e.g., a UE) and includes the following steps:

[0196] Step 700: Receive DCI from the wireless network node based on a set of wireless terminal IDs, wherein the DCI includes at least one set of beam resource related indications.

[0197] exist Figure 7 In this context, a wireless terminal receives a (public) DCI from a wireless network node (e.g., a satellite and / or HAPS) based on a set of wireless terminal IDs (corresponding to that wireless terminal). The DCI includes at least one set of beam resource correlation indications (e.g., beam resource correlation indication information). Note that the IDs associated with the reception of the DCI are configured for and / or shared by that set of wireless terminals.

[0198] In one embodiment, the wireless terminal applies at least one beam resource from at least one beam resource related indication set that corresponds to (e.g., is configured for or belongs to) the beam resource related indication set of the wireless terminal in communication (transmission and / or reception) with the wireless network node. The method by which the wireless terminal determines the beam resource related indication set corresponding to the wireless terminal from at least one beam resource related indication set can be referred to Embodiment 1.

[0199] In one embodiment, the group of wireless terminals includes all wireless terminals in the serving cell of the wireless network node. That is, the ID of the group of wireless terminals can be N-RNTI.

[0200] In one embodiment, the group of wireless terminals is one of multiple groups of wireless terminals in the serving cell of the wireless network node. In this embodiment, the ID is calculated (e.g., determined) based on the group index associated with the wireless terminal. For example, the ID of the group of wireless terminals could be N-RNTI-groupx, where x is the group index of the wireless terminal.

[0201] In one embodiment, the downlink control information includes a group index associated with at least one set of beam resource-related indications.

[0202] In one embodiment, the group index is mapped to a sequence of at least one beam resource associated indication set. That is, the beam resource associated indication set configured for a wireless terminal can be implicitly indicated by the group index of the wireless terminal and a sequence of at least one beam resource associated indication set. For example, the beam resource associated indication of a first group of wireless terminals (i.e., group index 1) is a first beam resource associated indication set (e.g., the first portion of the DCI bit) within at least one beam resource associated indication set.

[0203] In one embodiment, the beam resource associated indication set includes at least one of a frequency resource identifier, a TCI status ID, a CFO, or a polarization indicator. The frequency resource identifier may include at least one of a BWP ID, a narrowband ID, or a carrier ID.

[0204] In one embodiment, the beam resource associated indication set includes frequency resource identifiers. In this embodiment, the wireless terminal performs (subsequent) communication (with the wireless network node) by using frequency resources corresponding to the frequency resource identifiers.

[0205] In one embodiment, the beam resource associated indication set includes a TCI status ID. In this embodiment, the wireless terminal can perform at least one of the following:

[0206] The quasi-colocation (QCL) assumption provided by the TCI state corresponding to the TCI state ID will be applied to the reception of at least one of PDCCH, PDSCH, P-CSI-RS, SP-CSI-RS, AP-CSI-RS, or DM-RS.

[0207] The QCL assumption provided by the TCI state corresponding to the TCI state ID is applied to the transmission of at least one of SRS, PUCCH, PUSCH, or PRACH, or

[0208] Communication (with wireless network nodes) is performed by using the same frequency resources associated with reference signals included in the configuration that include TCI states corresponding to TCI state IDs.

[0209] In one embodiment, the beam resource associated indication set includes a CFO, and the wireless terminal performs communication (with the wireless network node) by applying synchronization according to the CFO.

[0210] In one embodiment, the beam resource associated indication set includes a polarization indicator, and the wireless terminal performs communication (with the wireless network node) by using the polarization indicated by the polarization indicator (e.g., LHCP or RHCP).

[0211] In one embodiment, the downlink control information is one of NR-DCI format (e.g., DCI format 1_1), NB-IoT DCI format (e.g., DCI format N2), or eMTC DCI format (e.g., DCI format 6_2).

[0212] In one embodiment, DCI is received in time slot n, where n is an integer. In this embodiment, the wireless terminal performs at least one of the following:

[0213] Monitor downlink transmissions on at least one beam resource in the beam resource related indication set corresponding to the wireless terminal at a time no earlier than time slot (n+m), where m is an integer determined based on the wireless terminal's ability to switch at least one beam resource, or

[0214] Uplink transmission is transmitted on at least one beam resource in the beam resource related indication set corresponding to the wireless terminal at a time no earlier than time slot (n+K_offset+l), where l is an integer determined based on the wireless terminal's ability to switch at least one beam resource, and K_offset refers to an additional scheduling offset configured by the wireless network node.

[0215] In one embodiment, the wireless terminal receives a handover request from a wireless network node. This handover request instructs the application of a beam resource correlation indication set corresponding to the wireless terminal from at least one beam resource correlation indication set to the timing of communication, and the application of at least one beam resource from the beam resource correlation indication set corresponding to the wireless terminal during this timing. Note that the handover request is received via a wireless terminal-specific DCI configured for the wireless terminal or via the latest handover request received from the wireless network node.

[0216] In one embodiment, at least one set of beam resource related indications is associated with at least one of uplink or downlink communication (e.g., both).

[0217] Figure 8 A flowchart of a method according to an embodiment of this disclosure is shown. Figure 8 The method shown can be used in wireless network nodes (such as BS, satellite, and / or HAPS) and includes the following steps:

[0218] Step 800: Transmit DCI to the wireless terminals based on a set of wireless terminal IDs, wherein the DCI includes at least one set of beam resource related indications.

[0219] exist Figure 8In this context, a wireless network node transmits a DCI to a wireless terminal (e.g., a UE) based on a set of wireless terminal IDs (corresponding to the wireless terminal). The DCI includes at least one set of beam resource related indications. Note that the IDs associated with the transmission of the DCI are configured for and / or shared by the group of wireless terminals.

[0220] In one embodiment, the wireless network node applies at least one beam resource from at least one beam resource related to a wireless terminal in a beam resource related indication set to the communication with the wireless terminal.

[0221] In one embodiment, the group of wireless terminals includes all wireless terminals in the serving cell of the wireless network node.

[0222] In one embodiment, the group of wireless terminals is one of multiple groups of wireless terminals in the serving cell of the wireless network node.

[0223] In one embodiment, the ID is calculated based on the group index of the wireless terminal.

[0224] In one embodiment, the DCI includes a group index associated with at least one set of beam resource-related indications.

[0225] In one embodiment, the group index is mapped to a sequence of at least one set of beam resource-related indicators.

[0226] In one embodiment, the beam resource associated indication set includes at least one of a frequency resource identifier, a TCI status ID, a CFO, or a polarization indicator.

[0227] In one embodiment, the beam resource associated indication set includes frequency resource identifiers, and the wireless network node performs communication with the wireless terminal by using frequency resources corresponding to the frequency resource identifiers.

[0228] In one embodiment, the beam resource associated indication set includes a TCI status identifier. In this embodiment, the wireless network node performs at least one of the following:

[0229] The QCL assumptions provided by the TCI state corresponding to the TCI state ID are applied to the transmission of at least one of PDCCH, PDSCH, P-CSI-RS, SP-CSI-RS, AP-CSI-RS, or DM-RS.

[0230] The QCL assumptions provided by the TCI state corresponding to the TCI state ID are applied to the reception of at least one of SRS, PUCCH, PUSCH, or PRACH.

[0231] Communication with the wireless terminal is performed by using the same frequency resources associated with the reference signal included in the configuration corresponding to the TCI state ID.

[0232] In one embodiment, the beam resource related indication set includes a CFO, and the wireless network node performs (subsequent) communication by applying synchronization based on the CFO.

[0233] In one embodiment, the beam resource associated indication set includes a polarization indicator, and the wireless network node performs (subsequent) communication by using the polarization indicated by the polarization indicator (e.g., LHCP or RHCP).

[0234] In one embodiment, the downlink control information is one of NR-DCI format (e.g., DCI format 1_1), NB-IoT DCI format (e.g., DCI format N2), or eMTC DCI format (e.g., DCI format 6_2).

[0235] In one embodiment, at least one beam resource from at least one beam resource correlation indication set corresponding to the beam resource correlation indication set of the wireless terminal is applied in time slot i, where i is an integer. In this embodiment, the wireless network node transmits DCI no later than time slot (ij), where j is an integer determined based on the longest propagation delay of the group of wireless terminals.

[0236] In one embodiment, a wireless terminal transmits a handover request to another wireless terminal, the handover request indicating that at least one beam resource from at least one beam resource associated with the wireless terminal's beam resource association indication set be applied to the timing of communication, and that a beam resource association indication corresponding to the wireless terminal be applied at that timing. In this embodiment, the handover request is transmitted via a wireless terminal-specific DCI configured for the wireless terminal or via a latest handover request transmitted to the wireless terminal.

[0237] In one embodiment, at least one set of beam resource related indications is associated with at least one of uplink or downlink communication (e.g., both).

[0238] Figure 9This diagram relates to a wireless terminal 90 according to an embodiment of the present disclosure. The wireless terminal 90 may be a user equipment (UE), mobile phone, laptop computer, tablet computer, e-book reader, or portable computer system, and is not limited thereto. The wireless terminal 90 may include a processor 900 such as a microprocessor or application-specific integrated circuit (ASIC), a storage unit 910, and a communication unit 920. The storage unit 910 may be any data storage device storing program code 912 accessed and executed by the processor 900. Embodiments of the storage unit 912 include, but are not limited to, a Subscriber Identity Module (SIM), Read-Only Memory (ROM), Flash memory, Random-Access Memory (RAM), hard disk, and optical data storage devices. The communication unit 920 may be a transceiver and is used to transmit and receive signals (e.g., messages or data packets) according to the processing results of the processor 900. In one embodiment, Figure 9 As shown, the communication unit 920 transmits and receives signals through at least one antenna 922.

[0239] In one embodiment, the storage unit 910 and the program code 912 may be omitted, and the processor 900 may include a storage unit with stored program code.

[0240] The processor 900 can implement any of the steps in the exemplary embodiments on the wireless terminal 90, for example, by executing program code 912.

[0241] The communication unit 920 may be a transceiver. Alternatively or as a supplement, the communication unit 920 may be configured as a transmission unit and a receiving unit that respectively transmit signals to and receive signals from a wireless network node (e.g., a base station).

[0242] Figure 10The diagram relates to a wireless network node 100 according to an embodiment of the present disclosure. The wireless network node 100 may be a satellite, HAPS, base station (BS), network entity, Mobility Management Entity (MME), Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (PDNGateway, P-GW), Radio Access Network (RAN) node, Next Generation RAN (NG-RAN) node, gNB, eNB, gNB Central Unit (gNB-CU), gNB Distributed Unit (gNB-DU), data network, core network, or Radio Network Controller (RNC), and is not limited thereto. In addition, the wireless network node 100 may include (execute) at least one network function, such as Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Application Function (AF), etc. The wireless network node 100 may include a processor 1000, such as a microprocessor or ASIC, a storage unit 1010, and a communication unit 1020. The storage unit 1010 may be any data storage device storing program code 1012 accessed and executed by the processor 1000. Examples of storage units 1012 include, but are not limited to, SIM, ROM, flash memory, RAM, hard disk, and optical data storage devices. The communication unit 1020 may be a transceiver and is used to transmit and receive signals (e.g., messages or data packets) according to the processing results of the processor 1000. In one example, such as... Figure 10 As shown, the communication unit 1020 transmits and receives signals through at least one antenna 1022.

[0243] In one embodiment, the storage unit 1010 and the program code 1012 may be omitted. The processor 1000 may include a storage unit containing stored program code.

[0244] The processor 1000 can implement any of the steps described in the exemplary embodiments on the wireless network node 100, for example, by executing program code 1012.

[0245] The communication unit 1020 may be a transceiver. Alternatively or as a supplement, the communication unit 1020 may be configured as a transmission unit and a receiving unit that transmit signals to and receive signals from a wireless terminal (e.g., a user equipment or another wireless network node).

[0246] While various embodiments of this disclosure have been described above, it should be understood that these embodiments are presented by way of example only and not by way of limitation. Similarly, various figures may depict exemplary architectures or configurations, which are provided to enable those skilled in the art to understand the exemplary features and functionality of this disclosure. However, those skilled in the art will understand that this disclosure is not limited to the example architectures or configurations shown, but can be implemented using various alternative architectures and configurations. Furthermore, as those skilled in the art will understand, one or more features of one embodiment may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of this disclosure should not be limited to any of the exemplary embodiments described above.

[0247] It should also be understood that any reference to elements in this document using names such as "first," "second," etc., generally does not restrict the number or order of these elements. Rather, these names serve as a convenient means of distinguishing two or more elements or instances of elements. Therefore, referring to the first and second elements does not imply that only two elements can be used, or that the first element must precede the second element.

[0248] Furthermore, those skilled in the art will understand that information and signals can be represented using any of a variety of different techniques and skills. For example, data, instructions, commands, information, signals, bits, and symbols can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0249] Those skilled in the art will further appreciate that any of the various illustrative logic blocks, units, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein can be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination thereof), firmware, various forms of program or design code incorporating instructions (which may be referred to herein as “software” or “software unit” for convenience), or any combination of these technologies.

[0250] To clearly illustrate this interchangeability of hardware, firmware, and software, various illustrative components, blocks, units, circuits, and steps have been broadly described above according to their functions. Whether this function is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functions in various ways for each specific application, but such implementation decisions will not depart from the scope of this disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, units, etc., can be configured to perform one or more functions described herein. The terms "configured to" or "configured for" as used herein with respect to a particular operation or function refer to processors, devices, components, circuits, structures, machines, units, etc., being physically constructed, programmed, and / or arranged to perform a particular operation or function.

[0251] Furthermore, those skilled in the art will understand that the various exemplary logic blocks, cells, devices, components, and circuits described herein can be implemented within or executed by an integrated circuit (IC), which may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, or any combination thereof. Logic blocks, cells, and circuits may also include antennas and / or transceivers for communicating with various components within a network or device. A general-purpose processor may be a microprocessor; however, alternatively, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration performing the functions described herein. If implemented in software, these functions may be stored as one or more instructions or code on a computer-readable medium. Therefore, the steps of the methods or algorithms disclosed herein can be implemented as software stored on a computer-readable medium.

[0252] Computer-readable media include computer storage media and communication media, including any medium capable of transferring computer programs or code from one place to another. Storage media can be any available medium that is accessible to a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that is accessible to a computer.

[0253] In this document, the term "unit" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the relevant functions described herein. Furthermore, for purposes of discussion, various units are described as discrete units; however, it will be apparent to those skilled in the art that two or more units can be combined to form a single unit performing the relevant functions according to embodiments of this disclosure.

[0254] Furthermore, in embodiments of this disclosure, memory or other storage devices and communication components may be employed. It should be understood that, for clarity, the above description has referenced various functional units and processors in the embodiments of this disclosure. However, it will be apparent that any suitable functional distribution among different functional units, processing logic elements, or domains may be used without departing from this disclosure. For example, functions illustrated as being performed by a separate processing logic element or controller may be performed by the same processing logic element or controller. Therefore, references to specific functional units are merely references to suitable means for providing said functionality and do not indicate a strict logical or physical structure or organization.

[0255] Various modifications to the embodiments described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but should be accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the appended claims.

Claims

1. A wireless communication method used in a wireless terminal, the method comprising: Downlink control information is received from a radio network node in a non-terrestrial network (NTN) based on a set of wireless terminal identifiers, wherein the downlink control information includes at least one set of beam resource related indications. The beam resource related indication set includes at least one of a frequency resource identifier, a transmission configuration indicator (TCI) status identifier, and a carrier frequency offset or polarization indicator. The downlink control information includes a group index associated with the at least one beam resource-related indication set. The group index is mapped to a sequence of the at least one beam resource-related indication set.

2. The wireless communication method according to claim 1, further comprising: At least one beam resource from the beam resource related indication set corresponding to the wireless terminal in the at least one beam resource related indication set is applied to communication with the wireless network node.

3. The wireless communication method according to claim 1, wherein, The group of wireless terminals includes all wireless terminals in the serving cell of the wireless network node.

4. The wireless communication method according to claim 1, wherein, The group of wireless terminals is one of multiple groups of wireless terminals in the serving cell of the wireless network node.

5. The wireless communication method according to claim 4, wherein, The identifier is calculated based on the group index associated with the wireless terminal.

6. The wireless communication method according to claim 1, wherein, The beam resource related indication set includes the frequency resource identifier. The method further includes: Communication is performed using frequency resources corresponding to the frequency resource identifier.

7. The wireless communication method according to claim 1, wherein, The beam resource related indication set includes the TCI status identifier. The method further includes at least one of the following: The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the reception of at least one of the physical downlink control channel, physical downlink shared channel, periodic channel state information reference signal, semi-persistent channel state information reference signal, access point channel state information reference signal, or demodulation reference signal. The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the transmission of at least one of the probe reference signal, physical uplink control channel, physical uplink shared channel, or physical random access channel; or Communication is performed using the same frequency resources associated with a reference signal included in the configuration corresponding to the TCI state identifier.

8. The wireless communication method according to claim 1, wherein, The beam resource related indication set includes the carrier frequency offset. The method further includes: Communication is performed by applying synchronization based on the carrier frequency offset.

9. The wireless communication method according to claim 1, wherein, The beam resource-related indicator set includes the polarization indicator. The method further includes: Communication is performed by using the polarization indicated by the polarization indicator.

10. The wireless communication method according to claim 1, wherein, The downlink control information is one of the following: a new wireless downlink control information format, a narrowband IoT downlink control information format, or an enhanced machine-type communication downlink control information format.

11. The wireless communication method according to claim 1, wherein, The downlink control information is received in time slot n, where n is an integer. The method further includes at least one of the following: Monitor downlink transmissions on at least one beam resource in the beam resource related indication set corresponding to the wireless terminal at a time no earlier than time slot (n+m), where m is an integer determined based on the wireless terminal's ability to switch the at least one beam resource, or Uplink transmission is transmitted on at least one beam resource in the beam resource related indication set corresponding to the wireless terminal at a time no earlier than time slot (n+K_offset+l), where l is an integer determined based on the wireless terminal's ability to switch the at least one beam resource, and K_offset refers to an additional scheduling offset configured by the wireless network node.

12. The wireless communication method according to claim 1, further comprising: A handover request is received from the wireless network node, the handover request indicating that at least one beam resource from the beam resource related indication set corresponding to the wireless terminal in the at least one beam resource related indication set be applied to the timing of communication, and The timing application corresponds to at least one beam resource in the beam resource related indication set of the wireless terminal. The handover request is received either through wireless terminal-specific downlink control information configured for the wireless terminal or through the latest handover request received from the wireless network node.

13. The wireless communication method according to claim 1, wherein, The at least one set of beam resource related indications is associated with at least one of uplink or downlink communication.

14. A wireless communication method used in a wireless network node of a non-terrestrial network (NTN), the method comprising: Downlink control information is transmitted to wireless terminals based on a set of wireless terminal identifiers, wherein the downlink control information includes at least one set of beam resource related indications. The beam resource related indication set includes at least one of a frequency resource identifier, a transmission configuration indicator (TCI) status identifier, and a carrier frequency offset or polarization indicator. The downlink control information includes a group index associated with the at least one beam resource-related indication set. The group index is mapped to a sequence of the at least one beam resource-related indication set.

15. The wireless communication method according to claim 14, further comprising: At least one beam resource from the beam resource related indication set corresponding to the wireless terminal in the at least one beam resource related indication set is applied to the communication with the wireless terminal.

16. The wireless communication method according to claim 14, wherein, The group of wireless terminals includes all wireless terminals in the serving cell of the wireless network node.

17. The wireless communication method according to claim 14, wherein, The group of wireless terminals is one of multiple groups of wireless terminals in the serving cell of the wireless network node.

18. The wireless communication method according to claim 17, wherein, The identifier is calculated based on the group index associated with the wireless terminal.

19. The wireless communication method according to claim 14, wherein, The beam resource related indication set includes the frequency resource identifier. The method further includes: Communication with the wireless terminal is performed by using the frequency resource corresponding to the frequency resource identifier.

20. The wireless communication method according to claim 14, wherein, The beam resource related indication set includes the TCI status identifier. The method further includes at least one of the following: The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the transmission of at least one of the physical downlink control channel, physical downlink shared channel, periodic channel state information reference signal, semi-persistent channel state information reference signal, access point channel state information reference signal, or demodulation reference signal. The quasi-co-location assumption provided by the TCI state corresponding to the TCI state identifier is applied to the reception of at least one of the probe reference signal, physical uplink control channel, physical uplink shared channel, or physical random access channel, or Communication with the wireless terminal is performed by using the same frequency resources associated with the reference signal included in the configuration corresponding to the TCI state identifier.

21. The wireless communication method according to claim 14, wherein, The beam resource related indication set includes the carrier frequency offset. The method further includes: Communication is performed by applying synchronization based on the carrier frequency offset.

22. The wireless communication method according to claim 14, wherein, The beam resource-related indicator set includes the polarization indicator. The method further includes: Communication is performed by using the polarization indicated by the polarization indicator.

23. The wireless communication method according to claim 14, wherein, The downlink control information is one of the following: a new wireless downlink control information format, a narrowband IoT downlink control information format, or an enhanced machine-type communication downlink control information format.

24. The wireless communication method according to claim 14, wherein, In time slot i, at least one beam resource from the beam resource correlation indication set corresponding to the wireless terminal is applied, where i is an integer. The method further includes: The downlink control information is transmitted no later than time slot (ij), where j is an integer determined based on the longest propagation delay of the group of wireless terminals.

25. The wireless communication method according to claim 14, further comprising: A handover request is transmitted to the wireless terminal, the handover request indicating that at least one beam resource from the at least one beam resource related to the wireless terminal's beam resource related indication set be applied to the timing of communication. The timing application corresponds to at least one beam resource in the beam resource related indication set of the wireless terminal. The handover request is transmitted via wireless terminal-specific downlink control information configured for the wireless terminal or via the latest handover request transmitted to the wireless terminal.

26. The wireless communication method according to claim 14, wherein, The at least one set of beam resource related indications is associated with at least one of uplink or downlink communication.

27. A wireless terminal, comprising: The communication unit is configured to receive downlink control information from a wireless network node of a non-terrestrial network (NTN) based on a set of wireless terminal identifiers, wherein the downlink control information includes at least one set of beam resource related indications. The beam resource related indication set includes at least one of a frequency resource identifier, a transmission configuration indicator (TCI) status identifier, and a carrier frequency offset or polarization indicator. The downlink control information includes a group index associated with the at least one beam resource-related indication set. The group index is mapped to a sequence of the at least one beam resource-related indication set.

28. The wireless terminal of claim 27, further comprising a processor configured to perform the wireless communication method of any one of claims 2 to 13.

29. A wireless network node for a non-terrestrial network (NTN), comprising: The communication unit is configured to transmit downlink control information to a wireless terminal based on a set of wireless terminal identifiers, wherein the downlink control information includes at least one beam resource related indication set. The beam resource related indication set includes at least one of a frequency resource identifier, a transmission configuration indicator (TCI) status identifier, and a carrier frequency offset or polarization indicator. The downlink control information includes a group index associated with the at least one beam resource-related indication set. The group index is mapped to a sequence of the at least one beam resource-related indication set.

30. The wireless network node of claim 29, further comprising a processor configured to perform the wireless communication method of any one of claims 15 to 26.

31. A computer program product comprising computer-readable program medium code stored thereon, the code, when executed by a processor, causing the processor to perform the wireless communication method according to any one of claims 1 to 26.

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