Patent Description:
As for example described in <CIT>, <CIT> or 3GPP contribution R2-<NUM>.

The invention is set out in independent claims <NUM> and <NUM>.

In some examples, the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network <NUM> through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

In some aspects, the wireless network <NUM> may include one or more non-terrestrial network (NTN) deployments in which a non-terrestrial wireless communication device may include a UE (referred to herein, interchangeably, as a "non-terrestrial UE"), a BS (referred to herein, interchangeably, as a "non-terrestrial BS" and "non-terrestrial base station"), and/or a relay station (referred to herein, interchangeably, as a "non-terrestrial relay station"), among other examples. As used herein, "NTN" may refer to a network for which access is facilitated by a non-terrestrial UE, non-terrestrial BS, and/or a non-terrestrial relay station, among other examples.

The wireless network <NUM> may include any number of non-terrestrial wireless communication devices. A non-terrestrial wireless communication device may include a satellite, a manned aircraft system, and/or an unmanned aircraft system (UAS) platform, among other examples. A satellite may include a low-earth orbit (LEO) satellite, a medium-earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, and/or a high elliptical orbit (HEO) satellite, among other examples. A manned aircraft system may include an airplane, helicopter, and/or a dirigible, among other examples. A UAS platform may include a high-altitude platform station (HAPS), and may include a balloon, a dirigible, and/or an airplane, among other examples. A non-terrestrial wireless communication device may be part of an NTN that is separate from the wireless network <NUM>. Alternatively, an NTN may be part of the wireless network <NUM>. Satellites may communicate directly and/or indirectly with other entities in wireless network <NUM> using satellite communication. The other entities may include UEs (e.g., terrestrial UEs and/or non-terrestrial UEs), other satellites in the one or more NTN deployments, other types of BSs (e.g., stationary and/or ground-based BSs), relay stations, and/or one or more components and/or devices included in a core network of wireless network <NUM>, among other examples.

For example, in some aspects, the wireless network <NUM> may be, include, or be included in a wireless backhaul network, sometimes referred to as an integrated access and backhaul (IAB) network. In an IAB network, at least one base station (e.g., base station <NUM>) may be an anchor base station that communicates with a core network via a wired backhaul link, such as a fiber connection. An anchor base station may also be referred to as an IAB donor (or IAB-donor), a central entity, and/or a central unit, among other examples. An IAB network may include one or more non-anchor base stations, sometimes referred to as relay base stations, IAB nodes (or IAB-nodes). The non-anchor base station may communicate directly with or indirectly with (e.g., via one or more non-anchor base stations) the anchor base station via one or more backhaul links to form a backhaul path to the core network for carrying backhaul traffic. Backhaul links may be wireless links. Anchor base station(s) and/or non-anchor base station(s) may communicate with one or more UEs (e.g., UE <NUM>) via access links, which may be wireless links for carrying access traffic.

In some aspects, a radio access network that includes an IAB network may utilize millimeter wave technology and/or directional communications (e.g., beamforming and/or precoding, among other examples) for communications between base stations and/or UEs (e.g., between two base stations, between two UEs, and/or between a base station and a UE). For example, wireless backhaul links between base stations may use millimeter waves to carry information and/or may be directed toward a target base station using beamforming and/or precoding, among other examples. Similarly, wireless access links between a UE and a base station may use millimeter waves and/or may be directed toward a target wireless node (e.g., a UE and/or a base station). In this way, inter-link interference may be reduced.

Some UEs may be considered Internet-of Things (IoT) devices, and/or may be implemented as may be implemented as NB-IoT (narrowband internet of things) devices.

In some aspects, the UE <NUM> may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station <NUM>.

As shown in <FIG>, the UE <NUM> may include a first communication manager <NUM>. As described in more detail elsewhere herein, the first communication manager <NUM> may receive a neighbor cell list that indicates at least one neighbor cell; perform a cell selection procedure or a cell reselection procedure; and switch to a serving cell without receiving an updated neighbor cell list from the serving cell.

As described in more detail elsewhere herein, the first communication manager <NUM> may determine that a serving cell visibility duration satisfies a first threshold; determine that a new cell visibility duration satisfies a second threshold; and perform a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied.

As described in more detail elsewhere herein, the first communication manager <NUM> may determine that a cell type of a candidate cell satisfies a reselection priority condition; and perform a cell reselection procedure to switch from a serving cell to the candidate cell based at least in part on determining that the cell type of the candidate cell satisfies the reselection priority condition. Additionally, or alternatively, the first communication manager <NUM> may perform one or more other operations described herein.

As shown in <FIG>, the base station <NUM> may include a second communication manager <NUM>. As described in more detail elsewhere herein, the second communication manager <NUM> may perform one or more operations described herein.

A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI parameter.

On the uplink, at UE <NUM>, a transmit processor <NUM> may receive and process data from a data source <NUM> and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, and/or CQI) from controller/processor <NUM>.

Controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform one or more techniques associated with neighbor cell list management in NTNs, as described in more detail elsewhere herein. For example, controller/processor <NUM> of base station <NUM>, controller/processor <NUM> of UE <NUM>, and/or any other component(s) of <FIG> may perform or direct operations of, for example, process <NUM> of <FIG>, process <NUM> of <FIG>, process <NUM> of <FIG>, and/or other processes as described herein. Memories <NUM> and <NUM> may store data and program codes for base station <NUM> and UE <NUM>, respectively. In some aspects, memory <NUM> and/or memory <NUM> may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station <NUM> and/or the UE <NUM>, may cause the one or more processors, the UE <NUM>, and/or the base station <NUM> to perform or direct operations of, for example, process <NUM> of <FIG>, process <NUM> of <FIG>, process <NUM> of <FIG>, and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.

In some aspects, UE <NUM> may include means for receiving a neighbor cell list that indicates at least one neighbor cell; means for performing a cell selection procedure or a cell reselection procedure; and/or means for switching to a serving cell without receiving an updated neighbor cell list from the serving cell, among other examples. In some aspects, such means may include one or more components of UE <NUM> described in connection with <FIG>, such as controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, and/or receive processor <NUM>, among other examples.

In some aspects, UE <NUM> may include means for determining that a serving cell visibility duration satisfies a first threshold, means for determining that a new cell visibility duration satisfies a second threshold, and/or means for performing a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied, among other examples. In some aspects, such means may include one or more components of UE <NUM> described in connection with <FIG>, such as controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, and/or receive processor <NUM>, among other examples.

In some aspects, UE <NUM> may include means for determining that a cell type of a candidate cell satisfies a reselection priority condition and/or means for performing a cell reselection procedure to switch from a serving cell to the candidate cell based at least in part on determining that the cell type of the candidate cell satisfies the reselection priority condition, among other examples. In some aspects, such means may include one or more components of UE <NUM> described in connection with <FIG>, such as controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, and/or receive processor <NUM>, among other examples.

In some aspects, base station <NUM> may include means for transmitting neighbor cell lists. In some aspects, such means may include one or more components of base station <NUM> described in connection with <FIG>, such as antenna <NUM>, DEMOD <NUM>, MIMO detector <NUM>, receive processor <NUM>, controller/processor <NUM>, transmit processor <NUM>, TX MIMO processor <NUM>, MOD <NUM>, and/or antenna <NUM>, among other examples.

<FIG> is a diagram illustrating examples <NUM> and <NUM> of NTN deployments. The example <NUM> and/or the example <NUM> may be, be similar to, include, or be included in, a wireless network such as the wireless network <NUM> shown in, and described in connection with, <FIG>.

Example <NUM> shows a conceptual depiction of a regenerative satellite deployment. In example <NUM>, a UE <NUM> is served by a satellite <NUM> via a service link <NUM>. For example, the satellite <NUM> may include a BS <NUM> (e.g., BS 110a), a gNB, and/or one or more functions (e.g., radio frequency (RF) filtering, frequency conversion, amplification, demodulation, decoding, switching, routing, coding, and/or modulation, among other examples) of a BS <NUM>, among other examples. The service link <NUM> may include an NR-Uu interface that is terminated at the satellite <NUM>. In some aspects, the satellite <NUM> may be referred to as a non-terrestrial base station, a regenerative repeater, and/or an on-board processing repeater, among other examples. In some aspects, the satellite <NUM> may demodulate an uplink radio frequency signal, and may modulate a baseband signal derived from the uplink radio signal to produce a downlink radio frequency transmission. The satellite <NUM> may transmit the downlink radio frequency signal on the service link <NUM>. The satellite <NUM> may provide a cell that covers the UE <NUM>.

Example <NUM> shows a transparent satellite deployment, which may also be referred to as a bent-pipe satellite deployment. In example <NUM>, a UE <NUM> is served by a satellite <NUM> via the service link <NUM>. The satellite <NUM> may be referred to as a transparent satellite, a bent-pipe satellite, and/or a non-terrestrial relay station, among other examples. The satellite <NUM> may relay a signal received from a terrestrial BS <NUM>, via an NTN gateway <NUM>. The satellite may repeat an NR-Uu interface via a feeder link <NUM>. The NTN gateway <NUM> may communicatively connect the satellite <NUM> and the BS <NUM> using an RF link <NUM>. For example, the satellite <NUM> may receive an uplink radio frequency transmission, and may transmit a downlink radio frequency transmission without demodulating the uplink radio frequency transmission. In some aspects, the satellite <NUM> may frequency convert the uplink radio frequency transmission received on the service link <NUM> to a frequency of the downlink radio frequency transmission on the feeder link <NUM>, and may amplify and/or filter the uplink radio frequency transmission. In some aspects, the UEs <NUM> shown in example <NUM> and example <NUM> may be associated with a Global Navigation Satellite System (GNSS) capability, and/or a Global Positioning System (GPS) capability, among other examples, though not all UEs have such capabilities. The satellite <NUM> may provide and/or facilitate a cell that covers the UE <NUM>.

The service link <NUM> may include a link between the satellite <NUM> and the UE <NUM>, and may include one or more of an uplink or a downlink. The feeder link <NUM> may include a link between the satellite <NUM> and the gateway <NUM>, and may include one or more parts of an uplink (e.g., from the UE <NUM> to the gateway <NUM>) or a downlink (e.g., from the gateway <NUM> to the UE <NUM>).

The feeder link <NUM> and the service link <NUM> may each experience Doppler effects due to the movement of the satellites <NUM> and <NUM>, and potentially movement of a UE <NUM>. These Doppler effects may be significantly larger than in a terrestrial network. The Doppler effect on the feeder link <NUM> may be compensated for to some degree, but may still be associated with some amount of uncompensated frequency error. Furthermore, the gateway <NUM> may be associated with a residual frequency error, and/or the satellite <NUM>/<NUM> may be associated with an on-board frequency error. These sources of frequency error may cause a received downlink frequency at the UE <NUM> to drift from a target downlink frequency.

<FIG> is a diagram illustrating an example <NUM> of cell selection in an NTN, in accordance with the present disclosure. As shown, a satellite <NUM> may serve a UE <NUM>. The satellite <NUM> may provide one or more cells <NUM>. Each cell <NUM> may include one or more beams. As shown, the UE <NUM> may be served by one of the cells (e.g., a "serving cell"). A satellite <NUM> may provide one or more cells <NUM>. One or more of the cells <NUM> may be neighbor cells to the serving cell <NUM>. The satellite <NUM> and/or <NUM> may include a base station <NUM> and/or a relay device, and may be, include, be included in, or be similar to, the satellite <NUM> shown in <FIG>, and/or the satellite <NUM> shown in <FIG>, among other examples.

The satellites <NUM> and/or <NUM> may use multiple antennas to form multiple beams that form beam footprints on the earth. In the illustrated examples, each cell <NUM> and/or <NUM> may include one or more beam footprints <NUM>. One or more different frequency intervals may be associated with each beam to mitigate interference between beams, thereby facilitating simultaneous transmission and reception capabilities. In some cases, one or more different beams may be associated with a frequency interval. The frequency intervals may be, or include, narrowbands, and/or bandwidth parts, among other examples.

Each cell <NUM> and <NUM> may have one or more associated cell identifiers (IDs) and may have an associated set of cell selection/reselection parameters. A "set of cell selection/reselection parameters" refers to a set of parameters that may be used for selection of the cell during a cell selection procedure and/or reselection of the cell during a cell reselection procedure. The set of cell selection/reselection parameters may include one or more parameters. In some cases, the set of selection/reselection parameters may be provided to the UE <NUM> as part of a neighbor cell list. For example, in some cases, each time that the UE <NUM> switches to a cell <NUM> or <NUM> as a serving cell, the new serving cell provides a neighbor cell list that indicates neighbor cells of the serving cell. The indications of the neighbor cells may include corresponding cell selection/reselection parameters (which may be referred to as "cell selection parameters" throughout this document for brevity and clarity of description). The cell selection/reselection information may be provided via system information blocks (SIBs) such as SIB4 and/or SIB5.

As the satellite <NUM> and/or <NUM> moves, the corresponding cells move across the ground. A satellite may move as fast as, for example, <NUM> kilometers/second or faster. Due to the movement of the satellite <NUM> and/or <NUM>, and thus the cell, a UE <NUM> may perform cell selection and/or reselection frequently. The UE <NUM> may perceive a change of cell coverage even though the UE <NUM> may be stationary. Frequent reselection of NTN cells may result in frequent discarding of stored neighbor cell lists, and acquisition of updated neighbor cell lists (e.g., SIBs), which may result in unnecessary communication traffic and power consumption at the UE <NUM>.

Aspects of the techniques and apparatuses described herein may facilitate providing a neighbor cell to a UE and allowing the UE to perform a cell selection or reselection procedure, and to switch to a serving cell without discarding a stored neighbor cell list from the serving cell and without necessarily receiving an updated neighbor cell list. In some aspects, for example, the UE may store the list and/or cell selection/reselection parameters from the list and reuse the parameters when applicable. For example, in some aspects, a non-terrestrial device such as a satellite may return to a same position relative to the ground periodically and the UE may reuse cell selection/reselection information corresponding to the cell to reselect the cell when it returns. In some aspects, neighbor cells may move with future cells (cells that may become serving cells in the future). In this case, a neighbor cell list associated with a moving future cell may be retained and reused. Similarly, a list of potential future cells may be retained and reused. In this way, aspects may enable a UE to refrain from acquiring updated neighbor cell lists each time the UE performs a cell selection or reselection procedure. As a result, aspects may have positive impacts on the reliability of network communications, including decreased latency and increased throughput, and may reduce UE power consumption.

Additionally, in some cases, each time a UE <NUM> switches to a new serving cell, the UE <NUM> is constrained to wait for at least one second before beginning a new cell reselection process. Due to the speed of NTN cell movement, the one second constraint may result in reselection failure because a target cell (which may be referred to as a "new" cell or a "candidate" cell) may no longer be within a geographical area of the UE <NUM> upon expiry of the one second.

Aspects of the techniques and apparatuses described herein may allow for cell reselection after a delay that is based on the movement of the NTN cells. In some aspects, for example, in addition to determining that a new cell satisfies one or more selection and/or reselection criteria, the UE <NUM> may determine whether a set of two thresholds are satisfied. A first threshold may correspond to a visibility duration of the serving cell and the second threshold may correspond to a visibility duration of a candidate cell (which may be referred to as a "new cell"). "Visibility duration" refers to an amount of time remaining during which the cell will be visible to a UE such that the UE may camp on and/or connect to that cell. In this way, delays between cell selections and/or reselections may be based on cell movement, resulting in increased cell connectivity and decreases in UE power consumption (as the UE may not need to attempt unnecessary and unsuccessful cell reselections).

In some aspects, the visibility duration, the first threshold, and/or the second threshold may be provided by a network device (e.g., a base station and/or a relay station, among other examples) or selected by a UE. For example, the UE may select the visibility duration, the first threshold, and/or the second threshold from among a set of possible values. In some aspects, the visibility duration may be determined by a cell stop time broadcast in system information for a low earth orbit (LEO) fixed cell. For LEO moving cells, the visibility duration may be determined by beam and/or satellite information.

Additionally, in some cases, cell type priorities may be employed. For example, during cell selection, a terrestrial network (TN) cell may be prioritized over an NTN cell, and/or an LEO cell may be prioritized over a GEO cell, among other examples. Due to the frequent cell reselection resulting from fast moving non-terrestrial devices, the priority rules may result in the UE <NUM> ping-ponging between a TN cell and an NTN cell, and/or between an LEO cell and a GEO cell, among other examples.

Aspects of the techniques and apparatuses described herein may provide a reselection priority to be used where the frequency priority is the same, the cell reselection is intra-frequency, and/or priority information is not available. In some aspects, for reselection, a UE may prioritize a current serving cell type (e.g., a TN cell type, an NTN cell type, an LEO cell type, a GEO cell type, etc.). In some aspects, the network may broadcast a bias parameter corresponding to the prioritization of the cell type (e.g., to indicate a prioritized cell type). In this way, aspects may facilitate constraining cell reselection to a certain cell type, thereby avoiding ping-ponging between cell types that have significant differences in motion characteristics. As a result, aspects may have positive impacts on the reliability of network communications, including decreased latency and increased reselection success.

<FIG> is a diagram illustrating an example <NUM> of beam and narrowband management, in accordance with the present disclosure. As shown in <FIG>, a wireless communication device <NUM> and a wireless communication device <NUM> may communicate with a UE <NUM>. The wireless communication device <NUM> and/or <NUM> may include a non-terrestrial base station, and/or a non-terrestrial relay device, among other examples. The wireless communication device <NUM> and/or <NUM> may provide a cell for supporting wireless communications. The wireless communication device <NUM> and/or <NUM> may provide multiple beams within the cell, and the UE <NUM> may select beams to switch to as the UE <NUM> moves within the cell (or as the cell moves relative to the UE <NUM>). The wireless communication device <NUM> may provide a serving cell to the UE <NUM>.

As shown by reference number <NUM>, the wireless communication device <NUM> may transmit, and the UE <NUM> may receive, a neighbor cell list that indicates at least one neighbor cell. The neighbor cell list may include a plurality of cell selection parameters configured to facilitate a cell selection procedure and/or a cell reselection procedure. The cell selection parameters may, therefore, include cell reselection parameters. In some aspects, the plurality of cell selection parameters may include at least one of a first set of cell selection parameters corresponding to at least one of a first frequency or a first cell identifier; and a second set of cell selection parameters corresponding to at least one of a second frequency or a second cell identifier. The plurality of cell selection parameters may be valid for a first geographical area. The first geographical area may correspond to a current location of the UE, and/or a specified location (e.g., via a signal and/or a wireless communication specification, among other examples).

The neighbor cell list may include one or more cell reselection parameters associated with a potential future serving cell. The one or more cell reselection parameters may correspond to one or more neighbor cells of the potential serving cell. In some aspects, the cell reselection parameters may include at least one of: a set of intra-frequency cell reselection parameters, or a set of inter-frequency cell reselection parameters. The UE <NUM> may perform a location update to indicate a location of the UE <NUM> to the network. The location of the UE <NUM> may correspond to a second geographical area, and the UE <NUM> may acquire an updated plurality of cell selection parameters that is valid for the second geographical area.

In some aspects, the UE <NUM> may detect at least one of a frequency or a cell identifier and determine, based at least in part on the neighbor cell list, a set of cell selection parameters that corresponds to the at least one of the frequency or the cell identifier. The UE <NUM> may perform an additional cell reselection procedure based at least in part on the set of cell selection parameters. For example, the wireless communication device <NUM> may be a satellite that returns to the same geographic location. In this case, if the UE <NUM> is stationary, relatively stationary, or returns to the location, the UE <NUM> may reuse the reselection parameters associated with that cell.

In some aspects, the UE <NUM> may detect a cell for which no cell selection/reselection parameters are stored. In this case, the UE <NUM> may decide to acquire the system information to update. In some aspects, the UE <NUM> may detect a cell and may determine that a neighbor cell list does not include a set of cell selection parameters corresponding to the cell. The UE <NUM> may acquire an updated neighbor cell list based at least in part on determining that the neighbor cell list does not include the set of cell selection parameters corresponding to the cell.

In some aspects, neighbor cells (e.g., provided by wireless communication device <NUM>) may move in addition to the serving cell. A fixed set of intra-frequency and inter-frequency cell reselection parameters may be defined for a potential serving cell. A list of future cells that will cover the same area at a different time may be provided, based on a position and a velocity of the cell. In some aspects, the network may not indicate the time at which a future cell will be in the location of the UE <NUM>. The UE <NUM> may calculate the time based on satellite and beam information. In some aspects, the list of future cells may include a list of next cells that share common system information. In some aspects, a list of neighbor cells and inter-frequency information may be provided. In some aspects, if the UE <NUM> reselects the next future cell, the UE <NUM> may not be required to acquire the intra-frequency neighbor cell list or inter-frequency carrier frequency list (e.g., SIB4 and SIB5 in LTE, and SIB3 and SIB4 in NR).

For example, the wireless communication device <NUM> may transmit, and the UE <NUM> may receive, a future cell coverage list that indicates one or more future cells. As indicated above, the one or more future cells may include one or more cells that will cover one or more locations of the UE <NUM> at one or more future time instances. The UE <NUM> may determine the one or more future time instances based at least in part on at least one of: an operating condition of the UE, device information corresponding to a non-terrestrial device (e.g., wireless communication device <NUM>) that provides the future cell, or beam information corresponding to one or more beams provided by the non-terrestrial device.

In some aspects, the future cell coverage list may be valid for an associated validity time. The UE <NUM> may refrain from acquiring an updated neighbor cell list based at least in part on the future cell coverage list being valid. If the UE <NUM> determines that the validity time is expired, the UE <NUM> may acquire an updated future cell coverage list based at least in part on determining that the validity time is expired. In some aspects, the UE <NUM> may determine that the validity time is expired by detecting expiry of a validity time expiration timer. In some aspects, the network (e.g., the wireless communication device <NUM>) may transmit, and the UE <NUM> may receive, an indication of expiration of the validity time.

In some aspects, the UE <NUM> may determine that a mobility level of the UE <NUM> satisfies an expiration condition corresponding to the future cell coverage list. The UE <NUM> may acquire an updated future cell coverage list based at least in part on determining that the mobility level of the UE <NUM> satisfies the expiration condition. For example, the mobility level may indicate a mobility state (e.g., whether the UE <NUM> is stationary or mobile), and/or a mobility degree (e.g., whether the UE <NUM> is moving at a speed that falls within a range of "slow" speeds, "medium" speeds, or "fast" speeds), among other examples.

As shown by reference number <NUM>, the UE <NUM> may determine that a cell type of a candidate cell provided by wireless communication device <NUM> satisfies a reselection priority condition. In some aspects, the cell type of the candidate cell may include at least one of: a terrestrial cell type, a non-terrestrial cell type, a low-earth orbit cell type, a mid-earth orbit cell type, or a geostationary earth orbit cell type. The UE <NUM> may determine that a first frequency priority corresponding to the serving cell is the same as a second frequency priority corresponding to the candidate cell, and may determine that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the first frequency priority is the same as the second frequency priority. In some aspects, the UE <NUM> may determine that a first frequency corresponding to the serving cell is different than a second frequency corresponding to the candidate cell, and may determine that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the first frequency is different than the second frequency.

In some aspects, the UE <NUM> may determine that a first frequency corresponding to the serving cell is different than a second frequency corresponding to the candidate cell, and may determine that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the first frequency is different than the second frequency. In some aspects, the UE <NUM> may determine that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the cell type of the candidate cell is the same cell type as a cell type of the serving cell. In some aspects, the network (e.g., the wireless communication device <NUM>) may transmit a broadcast message that indicates a bias parameter corresponding to the reselection priority condition. The bias parameter may indicate which parameter values are to be prioritized.

As shown by reference number <NUM>, the UE <NUM> may determine that a serving cell visibility duration satisfies a first threshold and that a new cell visibility duration satisfies a second threshold. For example, in some aspects, the UE <NUM> may determine that a cell provided by the wireless communication device <NUM> satisfies one or more reselection criteria (e.g., based at least in part on measuring radio resource management signals associated with the cell). The UE <NUM> may determine that a serving cell visibility duration satisfies a first threshold (e.g., is greater than the first threshold). The UE <NUM> may determine that a new cell visibility duration associated with the cell provided by wireless communication device <NUM> satisfies a second threshold (e.g., is less than the second threshold). In some aspects, the UE <NUM> may determine that the new cell visibility duration associated with the cell satisfies the second threshold by determining, at least in part, that the new cell visibility is greater than the first threshold. The UE <NUM> may perform a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied. In some aspects, the second threshold may be greater than or equal to the first threshold.

In some aspects, the UE <NUM> may determine that the new cell satisfies a cell reselection criterion during a network defined reselection time interval. The determination of satisfaction of the cell reselection criterion may vary depending on whether the cell reselection procedure is an inter-frequency cell reselection procedure, an inter-radio access technology cell reselection procedure, and/or a ranking-based cell reselection procedure, among other examples.

As shown by reference number <NUM>, the UE <NUM> may perform a cell reselection procedure to switch from the serving cell to the new cell. In some aspects, the UE <NUM> may perform a cell selection procedure or a cell reselection procedure to switch to the serving cell without receiving an updated neighbor cell list from the serving cell.

In some aspects, the serving cell may include a future cell, and the wireless communication device <NUM> may transmit, and the UE <NUM> may receive, a future cell coverage list. The future cell coverage list may indicate one or more additional future cells. Thus, the UE <NUM> may determine an occurrence of a cell reselection trigger (which may include a frequency measurement trigger). The UE <NUM> may determine that the additional future cell fails to satisfy a cell reselection criterion. The UE <NUM> may perform an additional cell reselection procedure to switch to a neighbor cell of the serving cell. In some aspects, the UE <NUM> may determine that the UE <NUM> does not include neighbor cell information associated with the neighbor cell of the serving cell. The UE <NUM> may acquire system information including the neighbor cell information, based at least in part on determining that the UE <NUM> does not include the neighbor cell information.

In some aspects, the UE <NUM> may fail to detect a cell that is included on a future cell coverage list, and, based on failing to detect such a cell, may acquire the system information comprising the neighbor cell information. A future cell coverage list is a list of cells that may be reselected by the UE <NUM>. An allowed cell list also may indicate a list of cells that may be reselected by the UE <NUM>. An allowed cell list may also indicate a list of cells that may be selected by the UE <NUM>. Cells on the future cell coverage list may be in a neighbor cell list, and/or a future cell list, among other examples. In some aspects, cells on the future cell coverage list may not be included in other lists. In some aspects, the future cell coverage list may be provided by the network. In some aspects, the UE <NUM> may refrain from acquiring a neighbor cell list corresponding to the serving cell based at least in part on receiving the future cell coverage list. The serving cell may include the future cell, and the future cell coverage list may indicate an additional future cell. The UE <NUM> may determine an occurrence of a cell reselection trigger, determine that the additional future cell fails to satisfy a cell reselection criterion, detect a cell that is included on an allowedcell list, and based thereon, may perform an additional cell reselection procedure to switch to the cell that is included on the allowed cell list.

In some aspects, the serving cell may include the future cell. The future cell coverage list may indicate an additional future cell. The UE <NUM> may determine an occurrence of a cell reselection trigger and may determine that the additional future cell fails to satisfy a cell reselection criterion or may fail to detect a cell that is included on a future cell coverage list. Based at least in part on one or more of these determinations, the UE <NUM> may perform an additional cell reselection procedure to switch to a neighbor cell of the serving cell.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by a UE, in accordance with the present disclosure. Example process <NUM> is an example where the UE (e.g., UE <NUM> shown in <FIG>) performs operations associated with neighbor cell list management in non-terrestrial networks.

As shown in <FIG>, in some aspects, process <NUM> may include receiving a neighbor cell list that indicates at least one neighbor cell (block <NUM>). For example, the UE (e.g., using reception component <NUM>, depicted in <FIG>) may receive a neighbor cell list that indicates at least one neighbor cell, as described above.

As further shown in <FIG>, in some aspects, process <NUM> may include storing the neighbor cell list (block <NUM>). For example, the UE (e.g., using communication manager <NUM>, depicted in <FIG>) may store the neighbor cell list, as described above.

As further shown in <FIG>, in some aspects, process <NUM> may include performing a cell selection procedure or a cell reselection procedure (block <NUM>). For example, the UE (e.g., using communication manager <NUM>) may perform a cell selection procedure or a cell reselection procedure, as described above.

As further shown in <FIG>, in some aspects, process <NUM> may include switching to a serving cell without discarding the stored neighbor cell list (block <NUM>). For example, the UE (e.g., using communication manager <NUM>) may switch to a serving cell without discarding the stored neighbor cell list, as described above.

In a first aspect, the neighbor cell list comprises a plurality of cell selection parameters configured to facilitate the cell selection procedure or the cell reselection procedure.

In a second aspect, alone or in combination with the first aspect, the plurality of cell selection parameters comprises a first set of cell selection parameters corresponding to at least one of a first frequency or a first cell identifier, and a second set of cell selection parameters corresponding to at least one of a second frequency or a second cell identifier.

In a third aspect, alone or in combination with one or more of the first and second aspects, the plurality of cell selection parameters are valid for a first geographical area.

In a fourth aspect, alone or in combination with the third aspect, process <NUM> includes performing a location update to indicate a location of the UE, wherein the location of the UE corresponds to a second geographical area, and acquiring an updated plurality of cell selection parameters that is valid for the second geographical area.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, process <NUM> includes detecting at least one of a frequency or a cell identifier, and determining, based at least in part on the stored neighbor cell list, a set of cell selection parameters that corresponds to the at least one of the frequency or the cell identifier.

In a sixth aspect, alone or in combination with the fifth aspect, process <NUM> includes performing an additional cell reselection procedure based at least in part on the set of cell selection parameters.

In a seventh aspect, alone or in combination with the first aspect, process <NUM> includes detecting a cell, determining that the stored neighbor cell list does not include a set of cell selection parameters corresponding to the cell, and acquiring an updated neighbor cell list based at least in part on determining that the neighbor cell list does not include the set of cell selection parameters corresponding to the cell.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the neighbor cell list comprises one or more cell reselection parameters associated with a potential future serving cell.

In a ninth aspect, alone or in combination with the eighth aspect, the one or more cell reselection parameters correspond to one or more neighbor cells of the potential future serving cell.

In a tenth aspect, alone or in combination with one or more of the eight or ninth aspects, the one or more cell reselection parameters comprise at least one of a set of intra-frequency cell reselection parameters, or a set of inter-frequency cell reselection parameters.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, process <NUM> includes receiving a future cell coverage list that indicates one or more future cells, wherein the one or more future cells comprise a cell that will cover a location of the UE at one or more future time instances.

In a twelfth aspect, alone or in combination with the eleventh aspect, process <NUM> includes determining the one or more future time instances based at least in part on at least one of an operating time of the UE, information corresponding to a non-terrestrial device that provides the future cell, or beaming information corresponding to one or more beams provided by the non-terrestrial device.

In a thirteenth aspect, alone or in combination with one or more of the eleventh or twelfth aspects, the neighbor cell list corresponds to the future cell.

In a fourteenth aspect, alone or in combination with one or more of the eleventh through thirteenth aspects, the serving cell comprises the future cell.

In a fifteenth aspect, alone or in combination with one or more of the eleventh through fourteenth aspects, the future cell coverage list comprises at least one of a cell identifier corresponding to the future cell, a carrier frequency corresponding to the future cell, or a cell reselection parameter corresponding to the future cell.

In a sixteenth aspect, alone or in combination with one or more of the eleventh through fifteenth aspects, the future cell coverage list is valid for an associated validity time.

In a seventeenth aspect, alone or in combination with the sixteenth aspect, process <NUM> includes refraining from acquiring an updated neighbor cell list based at least in part on the future cell coverage list being valid.

In an eighteenth aspect, alone or in combination with one or more of the sixteenth or seventeenth aspects, process <NUM> includes determining that the validity time is expired, and acquiring an updated future cell coverage list based at least in part on determining that the validity time is expired.

In a nineteenth aspect, alone or in combination with the eighteenth aspect, determining that the validity time is expired comprises detecting expiry of a validity time expiration timer.

In a twentieth aspect, alone or in combination with the eighteenth aspect, determining that the validity time is expired comprises receiving an indication of expiration of the validity time.

In a twenty-first aspect, alone or in combination with one or more of the eleventh through twentieth aspects, process <NUM> includes determining that a mobility level of the UE satisfies an expiration condition corresponding to the future cell coverage list, and acquiring an updated future cell coverage list based at least in part on determining that the mobility level of the UE satisfies the expiration condition.

In a twenty-second aspect, alone or in combination with one or more of the eleventh through twenty-first aspects, the serving cell comprises the future cell, and wherein the future cell coverage list indicates an additional future cell, the method further comprising determining an occurrence of a cell reselection trigger, determining that the additional future cell fails to satisfy a cell reselection criterion, and performing an additional cell reselection procedure to switch to a neighbor cell of the serving cell.

In a twenty-third aspect, alone or in combination with the twenty-second aspect, process <NUM> includes determining that the UE does not have stored neighbor cell information associated with the neighbor cell of the serving cell, and acquiring system information comprising the neighbor cell information, based at least in part on determining that the UE does not have stored neighbor cell information.

In a twenty-fourth aspect, alone or in combination with the twenty-third aspect, process <NUM> includes failing to detect a cell that is included on a future cell coverage list, wherein acquiring the system information comprising the neighbor cell information comprises acquiring the system information comprising the neighbor cell information based at least in part on failing to detect a cell that is included on a future cell coverage cell list.

In a twenty-fifth aspect, alone or in combination with one or more of the eleventh through twenty-fourth aspects, process <NUM> includes refraining from acquiring a neighbor cell list corresponding to the serving cell based at least in part on receiving the future cell coverage list.

In a twenty-sixth aspect, alone or in combination with one or more of the eleventh through twenty-fifth aspects, the serving cell comprises the future cell, and wherein the future cell coverage list indicates an additional future cell, the method further comprising determining an occurrence of a cell reselection trigger, determining that the additional future cell fails to satisfy a cell reselection criterion, detecting a cell that is included on an allowed cell list, and performing an additional cell reselection procedure to switch to the cell that is included on the allowed cell list.

In a twenty-seventh aspect, alone or in combination with one or more of the eleventh through twenty-sixth aspects, the serving cell comprises the future cell, and wherein the future cell coverage list indicates an additional future cell, the method further comprising determining an occurrence of a cell reselection trigger, determining that the additional future cell fails to satisfy a cell reselection criterion, failing to detect a cell that is included on a future cell coverage list, and performing an additional cell reselection procedure to switch to a neighbor cell of the serving cell.

As shown in <FIG>, in some aspects, process <NUM> may include determining that a serving cell visibility duration of a serving cell satisfies a first threshold (block <NUM>). For example, the UE (e.g., using communication manager <NUM>, depicted in <FIG>) may determine that a serving cell visibility duration of a serving cell satisfies a first threshold, as described above.

As further shown in <FIG>, in some aspects, process <NUM> may include determining that a new cell visibility duration of a new cell satisfies a second threshold (block <NUM>). For example, the UE (e.g., using communication manager <NUM>) may determine that a new cell visibility duration of a new cell satisfies a second threshold, as described above.

As further shown in <FIG>, in some aspects, process <NUM> may include performing a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied (block <NUM>). For example, the UE (e.g., using communication manager <NUM>, depicted in <FIG>) may perform a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied, as described above.

In a first aspect, determining that the serving cell visibility duration satisfies the first threshold comprises determining that the serving cell visibility duration is less than the first threshold, wherein the first threshold is a value provided by a network device or a value selected by the UE.

In a second aspect, alone or in combination with the first aspect, determining that the new cell visibility duration satisfies the second threshold comprises determining that the new cell visibility duration is greater than the second threshold.

In a third aspect, alone or in combination with one or more of the first through second aspects, determining that the new cell visibility duration satisfies the second threshold comprises determining that the new cell visibility duration is greater than the first threshold.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the second threshold is greater than or equal to the first threshold.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the cell reselection procedure comprises an inter-frequency cell reselection procedure.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the cell reselection procedure comprises an inter-radio access technology cell reselection procedure.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the cell reselection procedure comprises a ranking-based cell reselection procedure.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, process <NUM> includes determining that the new cell satisfies a cell reselection criterion during a network defined reselection time interval.

As shown in <FIG>, in some aspects, process <NUM> may include determining that a cell type of a candidate cell satisfies a reselection priority condition (block <NUM>). For example, the UE (e.g., using communication manager <NUM>, depicted in <FIG>) may determine that a cell type of a candidate cell satisfies a reselection priority condition, as described above.

As further shown in <FIG>, in some aspects, process <NUM> may include performing a cell reselection procedure to switch from a serving cell to the candidate cell based at least in part on determining that the cell type of the candidate cell satisfies the reselection priority condition (block <NUM>). For example, the UE (e.g., using communication manager <NUM>, depicted in <FIG>) may perform a cell reselection procedure to switch from a serving cell to the candidate cell based at least in part on determining that the cell type of the candidate cell satisfies the reselection priority condition, as described above.

In a first aspect, the cell type of the candidate cell comprises at least one of a terrestrial cell type, a non-terrestrial cell type, a low-earth orbit cell type, a mid-earth orbit cell type, or a geostationary earth orbit cell type.

In a second aspect, alone or in combination with the first aspect, process <NUM> includes determining that a first frequency priority corresponding to the serving cell is the same as a second frequency priority corresponding to the candidate cell, wherein determining that the cell type of the candidate cell satisfies the reselection priority condition comprises determining that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the first frequency priority is the same as the second frequency priority.

In a third aspect, alone or in combination with one or more of the first and second aspects, process <NUM> includes determining that a first frequency corresponding to the serving cell is different than a second frequency corresponding to the candidate cell, wherein determining that the cell type of the candidate cell satisfies the reselection priority condition comprises determining that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the first frequency is different than the second frequency.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, process <NUM> includes determining that frequency priority information corresponding to the candidate cell is not available, wherein determining that the cell type of the candidate cell satisfies the reselection priority condition comprises determining that the cell type of the candidate cell satisfies the reselection priority condition based at least in part on determining that the frequency priority information corresponding to the candidate cell is not available.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, determining that the cell type of the candidate cell satisfies the reselection priority condition comprises determining that the cell type of the candidate cell is the same cell type as a cell type of the serving cell.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, process <NUM> includes receiving a broadcast message that indicates a bias parameter corresponding to the reselection priority condition.

<FIG> is a block diagram of an example apparatus <NUM> for wireless communication in accordance with the present disclosure. The apparatus <NUM> may be, be similar to, include, or be included in a UE (e.g., UE <NUM> shown in <FIG>). In some aspects, the apparatus <NUM> includes a reception component <NUM>, a communication manager <NUM>, and a transmission component <NUM>, which may be in communication with one another (for example, via one or more buses). As shown, the apparatus <NUM> may communicate with another apparatus <NUM> (such as a client, a server, a UE, a base station, or another wireless communication device) using the reception component <NUM> and the transmission component <NUM>.

In some aspects, the apparatus <NUM> may be configured to perform one or more operations described herein in connection with <FIG>. Additionally, or alternatively, the apparatus <NUM> may be configured to perform one or more processes described herein, such as process <NUM> of <FIG>, process <NUM> of <FIG>, or process <NUM> of <FIG>, among other processes. In some aspects, the apparatus <NUM> may include one or more components of the first UE described above in connection with <FIG>.

The reception component <NUM> may provide means for receiving communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus <NUM>. The reception component <NUM> may provide received communications to one or more other components of the apparatus <NUM>, such as the communication manager <NUM>. In some aspects, the reception component <NUM> may provide means for signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components. In some aspects, the reception component <NUM> may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the first UE described above in connection with <FIG>.

The transmission component <NUM> may provide means for transmitting communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus <NUM>. In some aspects, the communication manager <NUM> may generate communications and may transmit the generated communications to the transmission component <NUM> for transmission to the apparatus <NUM>. In some aspects, the transmission component <NUM> may provide means for performing signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus <NUM>. In some aspects, the transmission component <NUM> may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the first UE described above in connection with <FIG>.

In some aspects, the communication manager <NUM> may provide means for receiving a neighbor cell list that indicates at least one neighbor cell; and performing a cell selection procedure or a cell reselection procedure to switch to a serving cell without receiving an updated neighbor cell list from the serving cell. In some aspects, the communication manager <NUM> may provide means for determining that a serving cell visibility duration satisfies a first threshold; determining that a new cell visibility duration satisfies a second threshold; and performing a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied. In some aspects, the communication manager <NUM> may provide means for determining that a cell type of a candidate cell satisfies a reselection priority condition; and performing a cell reselection procedure to switch from a serving cell to the candidate cell based at least in part on determining that the cell type of the candidate cell satisfies the reselection priority condition.

In some aspects, the communication manager <NUM> may include a controller/processor, a memory, or a combination thereof, of the first UE described above in connection with <FIG>. In some aspects, the communication manager <NUM> may include the reception component <NUM> and/or the transmission component <NUM>, among other examples. In some aspects, the means provided by the communication manager <NUM> may include, or be included within, means provided by the reception component <NUM> and/or the transmission component <NUM>, among other examples.

In some aspects, the communication manager <NUM> and/or one or more components of the communication manager <NUM> may include or may be implemented within hardware (e.g., the circuitry described in connection with <FIG>). In some aspects, the communication manager <NUM> and/or one or more components thereof may include or may be implemented within a controller/processor, a memory, or a combination thereof, of the UE <NUM> described above in connection with <FIG>.

In some aspects, the communication manager <NUM> and/or one or more components of the communication manager <NUM> may be implemented in code (e.g., as software or firmware stored in a memory). For example, the communication manager <NUM> and/or a component (or a portion of a component) of the communication manager <NUM> may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the communication manager <NUM> and/or the component. If implemented in code, the functions of the communication manager <NUM> and/or a component may be executed by a controller/processor, a memory, a scheduler, a communication unit, or a combination thereof, of the UE <NUM> described above in connection with <FIG>.

<FIG> is a diagram illustrating an example <NUM> of a hardware implementation for an apparatus <NUM> employing a processing system <NUM>. The apparatus <NUM> may be, be similar to, include, or be included in the apparatus <NUM> shown in <FIG>.

The processing system <NUM> may be implemented with a bus architecture, represented generally by the bus <NUM>. The bus <NUM> may include any number of interconnecting buses and bridges depending on the specific application of the processing system <NUM> and the overall design constraints. The bus <NUM> links together various circuits including one or more processors and/or hardware components, represented by a processor <NUM>, the illustrated components, and the computer-readable medium / memory <NUM>. The bus <NUM> may also link various other circuits, such as timing sources, peripherals, voltage regulators, and/or power management circuits, among other examples.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatuses over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically a reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically a transmission component <NUM>, and generates a signal to be applied to the one or more antennas <NUM> based at least in part on the received information. The processing system may include a communication manager <NUM> configured to manage one or more operations associated with communications described herein.

The processor <NUM> is coupled to the computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described herein in connection with a client. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> may include any number of additional components not illustrated in <FIG>. The components illustrated and/or not illustrated may be software modules running in the processor <NUM>, resident/stored in the computer-readable medium / memory <NUM>, one or more hardware modules coupled to the processor <NUM>, or some combination thereof.

In some aspects, the processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX MIMO processor <NUM>, the receive (RX) processor <NUM>, and/or the controller/processor <NUM>. In some aspects, the apparatus <NUM> for wireless communication provides means for receiving a neighbor cell list that indicates at least one neighbor cell; and performing a cell selection procedure or a cell reselection procedure to switch to a serving cell without receiving an updated neighbor cell list from the serving cell. In some aspects, the apparatus <NUM> for wireless communication provides means for determining that a serving cell visibility duration satisfies a first threshold; determining that a new cell visibility duration satisfies a second threshold; and performing a cell reselection procedure to switch from the serving cell to the new cell based at least in part on determining that the first threshold is satisfied and the second threshold is satisfied. In some aspects, the apparatus <NUM> for wireless communication provides means determining that a cell type of a candidate cell satisfies a reselection priority condition; and performing a cell reselection procedure to switch from a serving cell to the candidate cell based at least in part on determining that the cell type of the candidate cell satisfies the reselection priority condition.

The aforementioned means may be one or more of the aforementioned components of the processing system <NUM> of the apparatus <NUM> configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system <NUM> may include the TX MIMO processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM>. In one configuration, the aforementioned means may be the TX MIMO processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM> configured to perform the functions and/or operations recited herein.

<FIG> is a block diagram of an example apparatus <NUM> for wireless communication in accordance with the present disclosure. The apparatus <NUM> may be, be similar to, include, or be included in a wireless communication device (e.g., wireless communication device <NUM> shown in <FIG>). In some aspects, the apparatus <NUM> includes a reception component <NUM>, a communication manager <NUM>, and a transmission component <NUM>, which may be in communication with one another (for example, via one or more buses). As shown, the apparatus <NUM> may communicate with another apparatus <NUM> (such as a client, a server, a UE, a base station, or another wireless communication device) using the reception component <NUM> and the transmission component <NUM>.

In some aspects, the apparatus <NUM> may be configured to perform one or more operations described herein in connection with <FIG>. Additionally, or alternatively, the apparatus <NUM> may be configured to perform one or more processes described herein. In some aspects, the apparatus <NUM> may include one or more components of the base station described above in connection with <FIG>.

The reception component <NUM> may provide means for receiving communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus <NUM>. The reception component <NUM> may provide received communications to one or more other components of the apparatus <NUM>, such as the communication manager <NUM>. In some aspects, the reception component <NUM> may provide means for performing signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components. In some aspects, the reception component <NUM> may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with <FIG>.

The transmission component <NUM> may provide means for transmitting communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus <NUM>. In some aspects, the communication manager <NUM> may generate communications and may transmit the generated communications to the transmission component <NUM> for transmission to the apparatus <NUM>. In some aspects, the transmission component <NUM> may provide means for performing signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus <NUM>. In some aspects, the transmission component <NUM> may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with <FIG>.

The communication manager <NUM> may provide means for transmitting a neighbor cell list, a future cell list, and/or other system information, means for providing a cell, means for accommodating a UE cell selection procedure, and/or means accommodating a UE cell reselection procedure, among other examples. In some aspects, the communication manager <NUM> may include a controller/processor, a memory, a scheduler, a communication unit, or a combination thereof, of the base station described above in connection with <FIG>. In some aspects, the communication manager <NUM> may include the reception component <NUM> and/or the transmission component <NUM>, among other examples. In some aspects, the means provided by the communication manager <NUM> may include, or be included within, means provided by the reception component <NUM> and/or the transmission component <NUM>, among other examples.

In some aspects, the communication manager <NUM> and/or one or more components thereof may include or may be implemented within hardware. In some aspects, the communication manager <NUM> and/or one or more components thereof may include or may be implemented within a controller/processor, a memory, or a combination thereof, of the BS <NUM> described above in connection with <FIG>.

In some aspects, the communication manager <NUM> and/or one or more components thereof may be implemented in code (e.g., as software or firmware stored in a memory). For example, the communication manager <NUM> and/or a component (or a portion of a component) of the communication manager <NUM> may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the communication manager <NUM> and/or the component. If implemented in code, the functions of the communication manager <NUM> and/or a component may be executed by a controller/processor, a memory, a scheduler, a communication unit, or a combination thereof, of the BS <NUM> described above in connection with <FIG>.

The processing system <NUM> may be coupled to a transceiver <NUM>. The transceiver <NUM> is coupled to one or more antennas <NUM>. The transceiver <NUM> provides a means for communicating with various other apparatuses over a transmission medium. The transceiver <NUM> receives a signal from the one or more antennas <NUM>, extracts information from the received signal, and provides the extracted information to the processing system <NUM>, specifically a reception component <NUM>. In addition, the transceiver <NUM> receives information from the processing system <NUM>, specifically a transmission component <NUM>, and generates a signal to be applied to the one or more antennas <NUM> based at least in part on the received information. The processing system <NUM> may include a communication manager <NUM> configured to manage one or more operations associated with communications described herein.

The processor <NUM> is coupled to the computer-readable medium / memory <NUM>. The processor <NUM> is responsible for general processing, including the execution of software stored on the computer-readable medium / memory <NUM>. The software, when executed by the processor <NUM>, causes the processing system <NUM> to perform the various functions described herein in connection with a server. The computer-readable medium / memory <NUM> may also be used for storing data that is manipulated by the processor <NUM> when executing software. The processing system <NUM> may include any number of additional components not illustrated in <FIG>. The components illustrated and/or not illustrated may be software modules running in the processor <NUM>, resident/stored in the computer-readable medium / memory <NUM>, one or more hardware modules coupled to the processor <NUM>, or some combination thereof.

In some aspects, the processing system <NUM> may be a component of the UE <NUM> and may include the memory <NUM> and/or at least one of the TX MIMO processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM>. In some aspects, the apparatus <NUM> for wireless communication provides means for transmitting a neighbor cell list, a future cell list, and/or other system information, means for providing a cell, means for accommodating a UE cell selection procedure, and/or means accommodating a UE cell reselection procedure, among other examples. The aforementioned means may be one or more of the aforementioned components of the processing system <NUM> of the apparatus <NUM> configured to perform the functions recited by the aforementioned means. As described elsewhere herein, the processing system <NUM> may include the TX MIMO processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM>. In one configuration, the aforementioned means may be the TX MIMO processor <NUM>, the RX processor <NUM>, and/or the controller/processor <NUM> configured to perform the functions and/or operations recited herein.

Claim 1:
A method of wireless communication performed by a user equipment, UE (<NUM>) in a non-terrestrial network, NTN, comprising:
receiving (<NUM>) a neighbor cell list that indicates at least one neighbor cell; storing (<NUM>) the neighbor cell list;
performing (<NUM>) a cell selection procedure or a cell reselection procedure; switching (<NUM>) a serving cell without discarding the stored neighbor cell list; and
receiving a future cell coverage list that indicates one or more future cells, wherein the future cell comprises a cell that will cover a location of the UE (<NUM>) at one or more future time instances, wherein the serving cell comprises the future cell, and wherein the future cell coverage list indicates an additional future cell, the method further comprising:
determining an occurrence of a cell reselection trigger; and
determining that the additional future cell fails to satisfy a cell reselection criterion; and
performing an additional cell reselection procedure to switch to a neighbor cell of the serving cell, or
detecting a cell that is included on an allowed cell list and performing an additional cell reselection procedure to switch to the cell that is included on the allowed cell list, or
failing to detect a cell that is included on a future cell coverage list and performing an additional cell reselection procedure to switch to a neighbor cell of the serving cell.