Patent Description:
United States Patent Application Publication No. <CIT> relates to enabling a user terminal to obtain information about nearby cells and any beams generated by nearby cells. <NPL>, relates to a discussion on PLMN selection and cell identity and remaining issues on cell selection/reselection.

In some aspects, a method of wireless communication, performed by a UE, may include receiving system information associated with a set of neighboring cells included in an NTN, wherein the UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and monitoring a neighboring cell, of the set of neighboring cells, based at least in part on the system information.

In some aspects, a method of wireless communication, performed by a base station, may include determining system information associated with a set of neighboring cells included in an NTN, wherein a UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and transmitting the system information associated with the set of neighboring cells.

In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive system information associated with a set of neighboring cells included in an NTN, wherein the UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and monitor a neighboring cell, of the set of neighboring cells, based at least in part on the system information.

In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to determine system information associated with a set of neighboring cells included in an NTN, wherein a UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and transmit the system information associated with the set of neighboring cells.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to receive system information associated with a set of neighboring cells included in an NTN, wherein the UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and monitor a neighboring cell, of the set of neighboring cells, based at least in part on the system information.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to determine system information associated with a set of neighboring cells included in an NTN, wherein a UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and transmit the system information associated with the set of neighboring cells.

In some aspects, an apparatus for wireless communication may include means for receiving system information associated with a set of neighboring cells included in an NTN, wherein the apparatus is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and means for monitoring a neighboring cell, of the set of neighboring cells, based at least in part on the system information.

In some aspects, an apparatus for wireless communication may include means for determining system information associated with a set of neighboring cells included in an NTN, wherein a UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; and means for transmitting the system information associated with the set of neighboring cells.

The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node B", "5GNB", and "cell" may be used interchangeably herein.

In some examples, as indicated in <FIG>, a cell may be provided by a base station <NUM> of a non-terrestrial network (NTN). Such a base station <NUM> may also referred to as a non-terrestrial base station <NUM> or a non-terrestrial access point. As used herein, "NTN" may refer to a network for which access is provided by or assisted by a non-terrestrial base station <NUM>. In some NTN deployments, a non-terrestrial base station <NUM> may be located on an airborne platform or a platform in orbit. Examples of such platforms include a satellite (e.g., a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary orbit (GEO) satellite, or the like), a balloon, a dirigible, an airplane, an unmanned aerial vehicle (UAV), a drone, or the like.

In some NTN deployments (e.g., sometimes referred to as a transparent architecture or a bent pipe architecture), a non-terrestrial base station <NUM> may act as a relay station to relay communications between a UE <NUM> and a terrestrial base station <NUM> (e.g., a base station <NUM> located on the ground or on a tower). In this case, the non-terrestrial base station <NUM> may perform, for example, frequency translation and/or radio frequency amplification for communications relayed between the UE <NUM> and a terrestrial base station <NUM>. For example, the UE <NUM> may transmit an uplink communication to the non-terrestrial base station <NUM>, which may relay the uplink communication to a terrestrial base station <NUM> (e.g., after performing frequency translation, radio frequency amplification, and/or the like). The terrestrial base station <NUM> may perform additional processing on the uplink communication and/or may transmit the uplink communication to a core network. As another example, the terrestrial base station <NUM> may transmit a downlink communication to the non-terrestrial base station <NUM>, which may relay the downlink communication to the UE <NUM> (e.g., after performing frequency translation, radio frequency amplification, and/or the like). In some aspects, a UE <NUM> and/or the terrestrial base station <NUM> may be referred to as a ground station (GS).

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 communication of system information for neighboring cells in an NTN, 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>, 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 comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station <NUM> and/or the UE <NUM>, may perform or direct operations of, for example, 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, interpreting the instructions, and/or the like.

In some aspects, UE <NUM> may include means for receiving system information associated with a set of neighboring cells included in an NTN, wherein UE <NUM> is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; means for monitoring a neighboring cell, of the set of neighboring cells, based at least in part on the system information; and/or the like. 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>, receive processor <NUM>, and/or the like.

In some aspects, base station <NUM> may include means for determining system information associated with a set of neighboring cells included in an NTN, wherein a UE <NUM> is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform; means for transmitting the system information associated with the set of neighboring cells. ; and/or the like. 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>, antenna <NUM>, and/or the like.

As described above, an NTN may utilize non-terrestrial base stations (e.g., non-terrestrial base stations <NUM>) located on platforms referred to high altitude platforms, HAPs, as nodes for providing or assisting UEs (e.g., UEs <NUM>) with access to a core network. In an NTN, and similar to a terrestrial cellular network, the NTN system may be deployed in cells. A cell in which a UE is connected to or camped in is referred to as a current cell of the UE. The UE can dynamically switch to a neighboring cell of the current cell in various scenarios. For example, when the current cell is provided by a geostationary platform, such as a GEO satellite, the UE may switch to a neighboring cell due to movement of the UE. As another example, when the current cell is provided by a non-geostationary platform, such as a LEO satellite, the UE may switch to a neighboring cell due to movement of the platform and/or movement of the UE.

In an NTN system, again similar to a terrestrial cellular network, system information should be broadcast in a cell. To facilitate UE mobility (e.g., cell re-selection or handover) within the NTN network, system information should be broadcast for the current cell and neighboring cells of the current cell. However, unlike the terrestrial cellular network, NTN platforms typically have pre-determined locations (e.g., in an orbit) and the UE is equipped with high-gain narrow-beam directional antennas (e.g., a dish). A design of a means for conveying system information in an NTN (e.g., a system information block (SIB)) should take these factors into account.

A design for an NR NTN can be based on an NR system design. A typical SIB in an NR system provides information regarding neighboring frequency carriers and neighboring cells. For example, SIB3 is designed to convey intra-frequency neighboring cell information (e.g., a list of intra-frequency neighboring cells with specific cell re-selection parameters and a list of blacklisted intra-frequency neighboring cells), while SIB4 is designed to convey inter-frequency carrier and neighboring cell information (e.g., a list of neighboring carrier frequencies and frequency specific cell re-selection information, a list of inter-frequency neighboring cells with specific cell re-selection parameters, and a list of blacklisted inter-frequency neighboring cells).

Some aspects described herein provide techniques and apparatuses for communication of system information for neighboring cells in an NTN. Various example techniques for conveying system information for neighboring cells in an NTN are described below.

<FIG> and <FIG> are diagrams illustrating examples associated with comm communication of system information for neighboring cells in an NTN, in accordance with various aspects of the present disclosure.

In the example shown in <FIG>, a UE (e.g., a UE <NUM>) is connected to or camped in a cell of an NTN, the cell of the NTN being provided by a non-terrestrial base station (e.g., a non-terrestrial base station <NUM>). Here, the cell in which the UE is connected to or camped in is referred to as a current cell, and the platform that provides the current cell is referred to as a current platform (shown as a satellite in <FIG>).

Notably, example <FIG> is an example in which the non-terrestrial base station serves as a relay between the UE and a terrestrial base station (e.g., such that the UE <NUM> is provided access through a terrestrial base station <NUM>). However, in another example, the non-terrestrial base station may provide access to the UE directly, rather than acting as a relay. In such a case, actions described below as being performed by the terrestrial base station would be performed by the non-terrestrial base station.

As shown by reference <NUM> in <FIG>, the terrestrial base station may determine system information associated with a set of neighboring cells included in an NTN. Here, the set of neighboring cells may be a set of cells that neighbor the current cell. In some aspects, the set of neighboring cells may include one or more intra-platform neighboring cells (e.g., one or more neighboring cells provided by the current platform) and/or one or more inter-platform neighboring cells (e.g., one or more neighboring cells provided by another platform).

In some aspects, the information associated with the set of neighboring cells may include information indicating one or more characteristics or parameters of one or more intra-platform neighboring cells, one or more neighboring platforms, one or more inter-platform neighboring cells associated with the one or more other platforms, cell specific information for the one or more neighboring cells, and/or another type of information. Additional details regarding the system information are provided below.

In some aspects, the terrestrial base station may determine the system information associated with the set of neighboring cells based at least in part on information stored or accessible by the terrestrial base station. For example, the terrestrial base station may store information associated with a group of cells of the NTN, and may determine the system information associated with the set of neighboring cells based at least in part on the stored information. As a particular example, the terrestrial base station may determine that the terrestrial base station is to transmit system information associated with a set of neighboring cells of the current cell and, based at least in part on the stored information, may identify the set of neighboring cells of the current cell and determine information associated with the set of neighboring cells.

As indicated by reference <NUM>, the terrestrial base station may transmit the system information associated with the set of neighboring cells. In some aspects, the terrestrial base station may transmit (e.g., broadcast) the system information associated with the set of neighboring cells of the current cell. In some aspects, the terrestrial base station may transmit the information associated with the set of neighboring cells on a periodic basis, in response to detecting a trigger, based at least in part on a configuration of the terrestrial base station, and/or the like. In some aspects, the terrestrial base station may transmit the information associated with the set of neighboring cells based at least in part on receiving, from the UE, a request to provide information associated with a set of neighboring cells of the current cell.

As further indicated by reference <NUM>, the UE may receive the information associated with the set of neighboring cells. In some aspects, the UE may attempt to receive the information associated with the set of neighboring cells on a periodic basis, in response to detecting a trigger, based at least in part on a configuration of the UE, and/or the like, and may receive the information associated with the set of neighboring cells, accordingly. In some aspects, the UE may attempt to receive the information associated with the set of neighboring cells based at least in part on transmitting, to the terrestrial base station (via the current cell), a request to provide information associated with a set of neighboring cells of the current cell, and may receive the information associated with the set of neighboring cells, accordingly.

As shown by reference <NUM>, the UE may monitor a neighboring cell (e.g., measure the signal quality, track the position or track the frequency of the neighboring cell), of the set of neighboring cells, based at least in part on the system information. For example, the UE may, based at least in part on the information associated with the set of neighboring cells, select a target cell from the set of neighboring cells and initiate a handover from the current cell to the target neighboring cell. Here, if the handover is successful, the UE may communicate (e.g., transmit an uplink communication, receive a downlink communication) in the target cell (now the current cell).

In a typical NR system, neighboring cells can be categorized into intra-frequency neighboring cells and inter-frequency neighboring cells. However, due to the architecture of an NTN system, it may be comparatively simpler to categorize neighboring cells into intra-platform (e.g., intra-satellite) neighboring cells and inter-platform (e.g., inter-satellite) neighboring cells. Thus, for cells provided by the same platform, platform specific information (e.g., positioning information, attitude information, and/or the like) may need to be commonly broadcast to all the cells. In comparison, cell specific information (e.g., footprint information for one or more beams of a given cell) may need to be transmitted to a given UE for each cell.

Therefore, in some aspects, the system information may include a list of intra-platform neighboring cells associated with the platform (e.g., information that identifies one or more neighboring cells provided by the current platform). In some aspects, the system information may further include a blacklist of intra-platform neighboring cells associated with the platform (e.g., information that identifies one or more neighboring cells, provided by the current platform, that are reserved by the network and/or are not available or applicable for measurements, handovers, cell reselections, and/or the like).

Further, in some aspects, the system information may include a list of neighboring platforms (e.g., information that identifies one or more other platforms associated with providing one or more of the set of neighboring cells). Here, the system information may include a list of neighboring cells associated with a given neighboring platform on the list of neighboring platforms (e.g., information that identifies one or more neighboring cells provided by the given neighboring platform). In some aspects, the system information may further include a blacklist of neighboring cells associated with a given neighboring platform on the list of neighboring platforms (e.g., information that identifies one or more neighboring cells, provided by the given neighboring platform, that are reserved by the network and/or are not available or applicable for measurements, handovers, cell reselections, and/or the like).

In a case in which the neighboring cells are categorized into intra-platform neighboring cells and inter-platform neighboring cells, the system information may, in some aspects, be conveyed using a SIB including system information for intra-platform neighboring cells and a SIB including system information for inter-platform neighboring cells. <FIG> is a diagram illustrating SIB structures for conveying the system information in such a manner. In <FIG>, the system information <NUM> is conveyed using a SIB <NUM> and a SIB <NUM>. As noted in <FIG>, SIB <NUM> includes system information for intra-platform neighboring cells and SIB <NUM> includes system information for inter-platform neighboring cells. Notably, in the example shown in <FIG>, platform specific information for inter-platform neighboring cells (e.g., platform specific information 365a for platform A and platform specific information 365b for platform B) is included in SIB <NUM>, while platform specific information for intra-platform neighboring cells needs not to be transmitted in system information <NUM> (e.g., since such information would have already been conveyed in system information for the current cell).

Notably, while conveying the system information associated with the set of neighboring cells based on categorization into intra-platform neighboring cells and inter-platform neighboring cells in the manner described above is relatively simple, such an implementation may require a significant change to an existing NR SIB structure. Thus, in some aspects, it may be desirable to utilize an existing NR neighboring cell SIB structure (e.g., categorization into intra-frequency neighboring cells and inter-frequency neighboring cells) to convey the system information (e.g., so as to minimize the change to the NR SIB structure). Therefore, (e.g., when the existing NR neighboring cell SIB structure is used), the system information includes a platform identifier in an information element for a given neighboring cell in the set of neighboring cells. That is, within the NR neighboring cell SIB structure, the system information may include a platform identifier in an information element for each neighboring cell. Here, based at least in part on the platform identifier, cells provided by a given platform can be associated.

In some aspects, regardless of whether the system information is conveyed based at least in part on intra-platform/inter-platform categorization or utilizes the existing NR neighboring cell SIB structure, the system information may include one or more other types of information.

For example, in some aspects, the system information may include platform specific information for a neighboring platform associated with one or more neighboring cells in the set of neighboring cells. The platform specific information may include, for example, orientation information associated with the neighboring platform (e.g., a satellite attitude), positioning information associated with the neighboring platform (e.g., information that can be used to derive a location and/or a speed of the platform at a given time, and/or an indication of an accuracy of the information), and/or another type of information associated with the neighboring platform.

As another example, in some aspects, the system information may include cell specific information for each neighboring cell in the set of neighboring cells. In some aspects, the cell specific information for a given neighboring cell, of the set of neighboring cells, may include, for example, beam footprint information associated with a beam of the given neighboring cell (e.g., a beam orientation, a beam center location, a beam size, a beam shape, and/or the like), information that identifies a transmit power associated with the platform associated with the given neighboring cell, a cell identifier associated with the given neighboring cell, and/or another type of information associated with the neighboring cell.

In some aspects, to conserve resources and reduce overhead, it is desirable to broadcast platform specific system information, associated with a given platform, only once for all neighboring cells provided by the given platform. Therefore, in a case in which the existing NR neighboring cell SIB structure is used for conveying the system information in the manner described above, the system information may include platform specific information, associated with a given neighboring platform, in a single information element associated with one of the set of neighboring cells provided by the given platform. A given information element for a given neighboring cell carries an indication of whether platform specific information for a platform that provides the given neighboring cell is included in the information element. For example, a particular neighboring platform may provide a first neighboring cell and a second neighboring cell. Here, an information element associated with the first neighboring cell may include platform specific information for the particular platform, and may also include an indication that the information element associated with the first neighboring cell carries the platform specific information for the particular platform. Conversely, an information element associated with the second neighboring cell may not include platform specific information for the particular platform (since the information element associated with the first neighboring cell carries the platform specific information for the particular platform), and may also include an indication that the information element associated with the second neighboring cell does not carry the platform specific information for the particular platform. Notably, such an indicator may not be transmitted for intra-platform neighboring cells, in some aspects (e.g., since platform specific information for the current platform should have be already provided).

In some aspects, the system information may include platform specific system information for one or more neighboring platforms, and cell specific system information for one or more intra-platform neighboring cells and/or one or more inter-platform neighboring cells, as described above. In some aspects, such information may be conveyed as full (e.g., stand-alone) information in the system information. Alternatively, in some aspects, the system information may include the full platform specific information for one or more reference platforms, and differential information for one or more other platforms. Similarly, in some aspects, the system information may include full cell specific information for one or more reference cells, and differential cell specific information for one or more other cells. For example, for a given platform, a differential platform orientation may be defined as actual platform orientation for the given platform minus an actual beam orientation of a reference platform. Here, the system information may include full platform specific information for the reference platform, and differential platform specific information for the given platform (and one or more other platforms). In some aspects, utilization of differential information reduces an amount of information (e.g., a number of bits) needed to transmit the system information.

Thus, in some aspects, the system information may include differential information for one or more neighboring platforms associated with one or more neighboring cells of the set of neighboring cells, where full information associated with a reference platform is a reference for the differential information. In some aspects, the full information associated with the reference platform may be platform specific information associated with the current platform (i.e., the current platform may be used as the reference platform).

As an example, full positioning information for platform positioning can be transmitted for the current platform, while differential positioning information can be provided for neighboring platforms. Here, the UE may use the full position information and differential positioning information for a given neighboring platform to reconstruct full information for the given neighboring platform.

Similarly, in some aspects, the system information may include differential information for one or more neighboring cells of the set of neighboring cells, where full information associated with a reference cell is a reference for the differential information. In some aspects, the full information associated with the reference cell may be cell specific information associated with the reference cell. Here, the reference cell may be the current cell, a first cell of a particular platform (e.g., the current platform or another platform), or a center cell of the particular platform (e.g., the current platform or another platform).

As an example, full beam footprint information for a particular cell (e.g., current cell, first cell, or center cell) of a platform can be transmitted, while differential beam footprint information can be transmitted for other cells associated with the platform. Here, the UE may use the full beam footprint information and differential beam footprint information, associated with a given other cell, to reconstruct full beam footprint information for the given other cell.

Other examples may differ from what is described with respect to <FIG> and <FIG>.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process <NUM> is an example where the UE (e.g., UE <NUM> and/or the like) performs operations associated with communication of system information for neighboring cells in an NTN, in accordance with various aspects of the present disclosure.

As shown in <FIG>, in some aspects, process <NUM> may include receiving system information associated with a set of neighboring cells included in an NTN (block <NUM>). For example, the UE (e.g., using receive processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) may receive system information associated with a set of neighboring cells included in an NTN, as described above. In some aspects, the UE is connected to or camped in a current cell included in the NTN. In some aspects, the current cell is associated with a current platform.

As further shown in <FIG>, in some aspects, process <NUM> may include monitoring a neighboring cell, of the set of neighboring cells, based at least in part on the system information (block <NUM>). For example, the UE (e.g., using receive processor <NUM>, transmit processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) may monitor a neighboring cell, of the set of neighboring cells, based at least in part on the system information, as described above.

In a first aspect, the system information includes a list of intra-platform neighboring cells associated with the current platform.

In a second aspect, alone or in combination with the first aspect, the system information includes a blacklist of intra-platform neighboring cells associated with the current platform.

In a third aspect, alone or in combination with one or more of the first and second aspects, the system information includes a list of neighboring platforms.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the system information includes a list of neighboring cells associated with a given neighboring platform on the list of neighboring platforms.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the system information includes a blacklist of neighboring cells associated with a given neighboring platform on the list of neighboring platforms.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the system information includes a system information block including system information for intra-platform neighboring cells and a system information block including system information for inter-platform neighboring cells.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the system information includes platform specific information for a neighboring platform, the neighboring platform being associated with one or more neighboring cells in the set of neighboring cells.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the platform specific information includes orientation information associated with the neighboring platform.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the platform specific information includes positioning information associated with the neighboring platform.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the system information includes cell specific information for each neighboring cell in the set of neighboring cells.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the cell specific information for a given neighboring cell of the set of neighboring cells includes beam footprint information associated with a beam of the given neighboring cell.

In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the cell specific information for a given neighboring cell of the set of neighboring cells includes information that identifies a transmit power associated with the given neighboring cell.

In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the cell specific information for a given neighboring cell of the set of neighboring cells includes a cell identifier associated with the given neighboring cell.

In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the system information includes a platform identifier in an information element for a given neighboring cell in the set of neighboring cells.

In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, when the given neighboring cell is associated with a neighboring platform, the information element includes an indication of whether platform specific information, associated with the neighboring platform, is included in the information element associated with the given neighboring cell.

In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, the information element includes the platform specific information, associated with the given neighboring cell, when the indication indicates that the platform specific information is included in the information element.

In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the platform specific information associated with the neighboring platform is included in only one information element of the system information for a single neighboring cell of the set of neighboring cells.

In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, the system information does not include platform specific information associated with the current platform.

In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, the system information includes differential information for one or more neighboring platforms associated with one or more neighboring cells of the set of neighboring cells, wherein full information associated with a reference platform is a reference for the differential information.

In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, the full information associated with the reference platform includes platform specific information associated with the current platform.

In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, the system information includes differential information for one or more neighboring cells of the set of neighboring cells, wherein full information associated with a reference cell is a reference for the differential information.

In a twenty-second aspect, alone or in combination with one or more of the first through twenty-first aspects, the full information associated with the reference cell includes cell specific information associated with the reference cell, the reference cell being the current cell of the current platform, a first cell of a particular platform, or a center cell of the particular platform.

<FIG> is a diagram illustrating an example process <NUM> performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process <NUM> is an example where the base station (e.g., base station <NUM> and/or the like) performs operations associated with communication of system information for neighboring cells in an NTN, in accordance with various aspects of the present disclosure.

As shown in <FIG>, in some aspects, process <NUM> may include determining system information associated with a set of neighboring cells included in an NTN (block <NUM>). For example, the base station (e.g., using transmit processor <NUM>, receive processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) may determine system information associated with a set of neighboring cells included in an NTN, as described above. In some aspects, a UE (e.g., UE <NUM>) is connected to or camped in a current cell included in the NTN. In some aspects, the current cell is associated with a current platform.

As further shown in <FIG>, in some aspects, process <NUM> may include transmitting the system information associated with the set of neighboring cells (block <NUM>). For example, the base station (e.g., using transmit processor <NUM>, controller/processor <NUM>, memory <NUM>, and/or the like) may transmit the system information associated with the set of neighboring cells, as described above.

Claim 1:
A method (<NUM>) of wireless communication performed by a user equipment, UE, comprising:
receiving (<NUM>) system information associated with a set of neighboring cells included in a non-terrestrial network, NTN,
wherein the UE is connected to or camped in a current cell included in the NTN, the current cell being associated with a current platform, and
wherein the system information includes a platform identifier in an information element for a given neighboring cell in the set of neighboring cells, and wherein, when the given neighboring cell is associated with a neighboring platform, the information element includes an indication of whether platform specific information, associated with the neighboring platform, is included in the information element associated with the given neighboring cell, wherein each platform is a high altitude platform; and
monitoring (<NUM>) a neighboring cell, of the set of neighboring cells, based at least in part on the system information.