Techniques for channel measurement and reporting for lower layer mobility

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a serving base station, a message indicating a set of synchronization signal block (SSB) resources for synchronization signal transmission by the serving base station and by one or more neighbor base stations. The SSB resources may include a first portion of resources associated with the serving base station and additional portions of resources associated with the one or more neighbor base stations. The UE may identify two or more symbols which are adjacent to consecutive SSB resources of the set of SSB resources, and exclude the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to consecutive SSB resources. The UE may communicate with the serving base station on symbols other than the two or more symbols.

FIELD OF TECHNOLOGY

The following relates to wireless communications, including techniques for channel measurement and reporting for lower layer mobility.

BACKGROUND

In some wireless communications systems, a UE may be configured for lower layer mobility, such as Layer 1 (L1)/Layer 2 (L2) mobility, where the UE may perform lower layer handover procedures so that the UE may dynamically perform a handover procedure to a neighboring base station. To support such lower layer mobility, a UE may be configured to monitor for one or more transmissions, such as synchronization signal block (SSB) transmissions, from one or more base stations to determine whether to perform a handover procedure. Conventional methods for configuring a UE to monitor for the one or more SSB transmissions may be improved.

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for channel measurement and reporting for lower layer mobility. Generally, the described techniques provide for enhanced methods for a user equipment (UE) to monitor for transmissions from one or more base stations to perform channel measurements and to determine whether to perform a handover procedure. A UE may receive, from a serving base station, a message indicating a set of synchronization signal block (SSB) resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations. The set of SSB resources may include a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The UE may identify two or more symbols which are adjacent to consecutive SSB resources of the set of SSB resources. The UE may exclude the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to consecutive SSB resources. In some cases, the UE may be configured to exclude the set of SSB resources or a subset of the set of SSB resources from being used for communications between the UE and the serving base station. The UE may exclude the two or more symbols and/or the set or subset of SSB resources so as to mitigate interference between SSB transmissions and communications between the UE and the serving base station. The UE may communicate with the serving base station on resources other than the resources being excluded. As interference to SSB transmissions during the set or subset of SSB resources may be mitigated, the UE may reliably perform channel quality measurements on one or more received SSB transmissions from the serving base station and/or from one or more neighboring base stations to determine whether to perform a handover procedure with a neighboring base station. In some cases, as the UE may receive an indication of the set of SSB resources, the UE may perform SSB measurements (e.g., lower layer, such as Layer 1 (L1) measurements) and report the SSB measurements based on the set of SSB resources, even if the UE115has not received an indication that a certain SSB resource or SSB transmission is configured for channel measurement reporting (e.g., L1 reporting). In some implementations, the UE may be configured to report SSB measurements based on an event (e.g., an A1, A2, A3 trigger), rather than the SSB being configured for lower layer-based measurement and reporting.

DETAILED DESCRIPTION

In some wireless communications systems, a user equipment (UE) may be configured to monitor for one or more downlink transmissions from a serving base station of the UE. The UE may receive an indication of a set of resources over which to monitor for the one or more downlink transmissions. For example, the UE may receive an indication of a set of synchronization signal block (SSB) resources, during which the serving base station may transmit SSB transmissions over one or more beams in a beam sweeping manner. In some cases, the UE may be configured to refrain from transmitting or receiving transmissions, such as data transmissions, during such SSB resources, and during one symbol before and one symbol after each SSB resource. As the UE may refrain from communications during such SSB resources, the UE may reliably monitor for, receive, and measure SSB transmissions from the serving base station without interference. The UE may measure received SSB transmissions from the serving base station and transmit a report to the serving base station that may indicate the one or more measurements, or indicate to the base station a beam (e.g., a preferred beam) to use for communications with the UE.

In some implementations, the UE may be configured to monitor for SSB transmissions from one or more neighboring base stations that the UE may measure to determine whether to perform a handover procedure to a neighboring base station. For example, a UE may be a highly mobile device and/or may be located in a highly mobile wireless communications system. As such, a UE may benefit from an efficient handover procedure. Therefore, a UE may be configured to perform lower layer mobility (e.g., Layer 1 (L1)/Layer 2 (L2) mobility). An example of lower layer mobility may be a UE performing a lower layer handover procedure (e.g., L1/L2 handover procedure) to a neighboring base station. A lower layer handover procedure may be more efficient, and allow for a more dynamic handover of a UE from a serving base station to a neighbor base station. If a UE is configured to perform lower layer mobility, a UE may monitor and measure SSBs from the serving base station of the UE, or from neighbor base stations (e.g., base stations nearby the UE), or both. In some cases, a UE may not receive an indication of the SSB resources being used by the one or more neighbor base stations for SSB transmissions and/or the UE may not be configured to refrain from transmitting or receiving transmissions, such as data transmissions, during the neighboring base stations SSB resources. As such, the UE may attempt to communicate, such as with the serving base station of the UE, during such SSB resources. A neighboring base station may transmit an SSB transmission in the same duration (e.g., symbol, slot, transmission time interval (TTI)) that the UE may attempt to communicate. Thus, the UEs communication attempt may interfere with the UEs ability to receive and measure the SSB transmission from the neighboring station which may interfere with the ability of the UE to perform a lower layer handover procedure with the neighboring base station.

To mitigate interference at a UE and to improve procedures associated with lower layer mobility, such as lower layer handover procedures, a UE may receive an indication of a set of SSB resources (e.g., time and frequency resources during which an SSB may be transmitted), where the set of resources may include SSB resources used by the serving base station and SSB resources used by one or more neighboring base stations of the UE. In some cases, the UE may be configured to refrain from communicating during each resource included in the set of SSB resources. The UE may refrain from transmitting a number of time resources before (e.g., one symbol) and a number of time resources after (e.g., one symbol) each set of consecutive SSB resources in the set of SSB resources. In some implementations, the UE may receive an indication of a subset of the set of SSB resources and the UE may refrain from communicating during each resource included in the subset (rather than the set). The UE may refrain from transmitting a number of time resources before (e.g., one symbol) and a number of time resources after (e.g., one symbol) each set of consecutive SSB resources in the subset of SSB resources. As the UE may refrain from communicating during the set or subset of SSB resources, the UE may reliably monitor for SSB transmissions from the serving base station and/or from the one or more neighboring base stations. In some implementations, the UE may monitor for SSB transmissions during the set or subset of SSB resources and measure one or more received SSB transmissions. For example, the UE may measure the quality (e.g., reference signal received quality (RSRQ)), power (e.g., reference signal received power (RSRP)), etc. of the one or more received SSB transmissions to determine the beam (e.g., a preferred beam) over which the UE receives a highest (or high) power and/or quality signal. The UE may transmit a measurement report for one or more of the received SSB transmissions, such as one or more SSB transmissions with the highest measurements (e.g., highest quality, highest power), where the reported SSB measurements may be associated with SSB transmissions from the serving base station, or one or more neighboring base stations.

In some implementations, a UE may be configured to measure and transmit a measurement report for SSB transmissions in SSB resources that are configured for lower layer (e.g., L1) reporting, and SSB transmissions in SSB resources that are not configured for lower layer (e.g., L1) reporting. For example, if the SSB resource is included in the set or subset, even if the UE has not received an indication that a certain SSB resource or SSB transmission is configured for L1 reporting, the UE may perform L1-based measurements and report the L1-based measurements (e.g., autonomously). In some implementations, the UE115may be configured to report SSB measurements based on an event (e.g., an A1, A2, A3 trigger), rather than the SSB being configured for lower layer-based measurement and reporting.

Particular aspects of the subject matter described herein may be implemented to realize one or more advantages. The described techniques may support improvements in monitoring for SSB transmissions and reporting SSB measurements for performing lower layer handover procedures. Such techniques may support improving reliability and efficiency, and decreasing latency, among other advantages. As such, supported techniques may include improved network operations and, in some examples, may promote network efficiencies, among other benefits.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects are then described with reference to a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to techniques for channel measurement and reporting for lower layer mobility.

A UE115may be configured to perform lower layer mobility such as lower layer handover procedures with one or more base stations105such as to support communications in highly mobile communications systems. A UE115may receive, from a serving base station105, a message indicating a set of SSB resources reserved for synchronization signal transmission by the serving base station105and by one or more neighbor base stations105. The set of SSB resources may include a first portion of resources associated with the serving base station105and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations105. The UE115may identify two or more symbols which are adjacent to consecutive SSB resources of the set of SSB resources. The UE115may exclude the two or more symbols from being used for communications between the UE115and the serving base station105based on the two or more symbols being adjacent to consecutive SSB resources. In some cases, the UE115may be configured to exclude the set of SSB resources or a subset of the set of SSB resources from being used for communications between the UE115and the serving base station105. The UE115exclude the two or more symbols and/or the set or subset of SSB resources so as to mitigate interference between SSB transmissions and communications between the UE115and the serving base station105. The UE115may communicate with the serving base station105on resources other than the resources being excluded. As interference to SSB transmissions during the set or subset of SSB resources may be mitigated, the UE115may reliably perform channel quality measurements on one or more received SSB transmissions from the serving base station105and/or from one or more neighboring base stations105to determine whether to perform a handover procedure with a neighboring base station105.

FIG.2illustrates an example of a wireless communications system200that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The wireless communications system200may include base stations105-aand105-band UE115-a, which may be examples of base stations105and a UE115as described with reference toFIG.1. Base station105-aand base station105-bmay each serve a geographic coverage area which overlap, partially overlap, or not overlap with one another. In some cases, UE115-amay implement an SSB monitoring and measurement procedure to support lower layer mobility. Additionally or alternatively, other wireless devices, such as base station105-aand105-b, or some combination of these base stations105, may implement SSB monitoring and measurement, or both for a handover procedure.

In some implementations, a UE115may communicate with a serving base station105of the UE115and/or communicate with one or more other base stations105, such as neighboring base stations105to the UE115. In some cases, a base station105as described herein may refer to a TRP, an IAB node, a cell, a wireless device, etc. For example, UE115-aand base station105-amay be in communications with one another, where base station105-amay be the serving base station105of UE115-a. UE115-amay receive one or more signals from base station105-avia communication link210, which may be a downlink communications link. For example, base station105-amay transmit SSB configuration information215to UE115-avia communication link210that may allow UE115-ato perform an SSB monitoring and measurement procedure. In some cases, the communications link may be a directional beam or may be transmitted via a directional beam, such as beam205-b.

For example, a UE115may be configured to monitor for one or more downlink transmissions from a serving base station105of the UE115. The UE115may receive an indication of a set of resources over which to monitor for the one or more downlink transmissions. For example, the UE115may receive an indication of a set of SSB resources (e.g., time and frequency resources), during which the serving base station105may transmit SSB transmissions over one or more beams205in a beam sweeping manner. For example, base station105-amay transmit one or more SSB transmission in SSB resources over beams205-a,205-b, and205-c. UE115-amay monitor for the one or more SSB transmissions, and measure the power (e.g., RSRP), quality (e.g., RSRQ, SINR), etc. of one or more received SSB transmissions. In some cases, the UE115may be configured to refrain from transmitting or receiving transmissions (e.g., non-SSB related transmissions with a serving base station105or neighboring base station105), such as data transmissions, during SSB resources associated with the serving base station105, and during one symbol before and one symbol after each consecutive SSB resource. As the UE115may refrain from communications during such SSB resources, the UE115may reliably monitor for, receive, and measure SSB transmissions from the serving base station105without interference.

In some cases, UE115-amay be configured to transmit a measurement report to base station105-athat indicates a preferred beam205of UE115-a. For example, the report may include each measurement of each received SSB transmission, or a number of highest measurements, where the measurements are associated with an SSB transmission and thus a beam205. Therefore, the report may implicitly indicate a preferred beam205. In another example, the report may explicitly indicate a beam identifier of one or more beams with the highest SSB measurements (e.g., highest quality and/or highest power measurements). Base station105-amay use the information included in the SSB measurement report to determine whether to communicate with UE115-avia beam205-a, beam205-b, or205-c.

In some implementations, the UE115may be configured to monitor for SSB transmissions from one or more neighboring base stations105, such as base station105-b. The UE115may measure one or more received SSB transmissions from the neighboring base station105to determine whether to perform a handover procedure to the neighboring base station105. For example, UE115-amay be a highly mobile device and/or may be communicating in a highly mobile wireless communications system. As such, UE115-amay benefit from an efficient handover procedure. Therefore, UE115-amay be configured to perform lower layer mobility (e.g., L1/L2 mobility). An example of lower layer mobility may be a UE115performing a lower layer handover procedure (e.g., L1/L2 handover procedure) to a neighboring base station105, such that the handover procedure may be performed in the physical (PHY) layer and/or the MAC layer. A lower layer handover procedure may be an efficient and dynamic method for performing handover of a UE115from a serving base station105to a neighbor base station105.

If a UE115is configured to perform lower layer mobility, a UE115may monitor and measure SSBs from a serving base station105of the UE115, or from one or more neighboring base stations105(e.g., base stations105nearby the UE115, candidate base station105), or both. In some cases, a UE115may not receive an indication of SSB resources being used by one or more of the neighboring base stations105for SSB transmissions and/or the UE115may not be configured to refrain from transmitting or receiving transmissions, such as data transmissions, during the SSB resources being used by the neighboring base stations105. For example, UE115-amay receive an indication of the SSB resources being used by serving base station105-band may be configured to refrain from performing non-SSB communications during such SSB resources. However, UE115-bmay not receive an indication of the SSB resources being used by neighboring base station105-band/or UE115-amay not be configured to refrain from performing non-SSB communications during such SSB resources. As such, UE115-amay attempt to communicate (e.g., transmit data transmissions, receive data transmissions, or both), such as with serving base station105-a, during SSB resources being used by neighboring base station105-b. Neighboring base station105-bmay transmit an SSB transmission in the same duration (e.g., symbol, slot, TTI) that UE115-amay attempt to communicate with serving base station105-a. Thus, the communication attempt by UE115-amay interfere with the ability of UE115-ato receive and measure the SSB transmission from neighboring station105-bwhich may interfere with the ability of UE115-ato perform a lower layer handover procedure with neighboring base station105-b. For example, if UE115-atransmits an uplink transmission in a symbol during which neighboring base station105-bis transmitting an SSB transmissions, the uplink transmission may interfere with the downlink SSB transmission (e.g., self-interference), where the uplink transmission and the downlink transmission may be transmitted via the same frequency band, or via cross-interfering bands, and/or UE115-amay not have the ability to transmit and receive transmissions simultaneously. As such, UE115-amay be unable to reliably receive and measure the SSB transmission from neighboring base station105-b. If UE115-ais unable to reliably receive SSB transmissions from at least neighboring base station105-b, UE115-amay be unable to, or incorrectly determine whether to perform a lower layer handover procedure with at least neighboring base station105-b.

To mitigate interference at a UE115and to improve procedures associated with lower layer mobility, such as lower layer handover procedures, a UE115may receive, from a serving base station105, an indication of a set of SSB resources, where the set of resources may include SSB resources used by the serving base station105and SSB resources used by one or more neighboring base stations105of the UE115. In some cases, the UE115may receive the indication from one or more non-serving base stations105. The set of SSB resources may include the SSB resources associated with each base station105that is configured as a candidate handover base station105to the UE115, or each base station105within a threshold proximity to the UE115, or a combination thereof. For example, UE115-amay receive an indication of each neighboring base station105that may perform lower layer mobility with UE115, where the indication may include an identifier, such as a physical cell identifier (PCI), of each of the neighboring base stations105and/or the serving base station105. The indication may also include the SSB resources associated with each base station105(e.g., with each PCI). In some cases, UE115-amay receive the indication of the set of base stations105(e.g., PCIs) and the set of SSB resource associated with each base station105via a radio resource control (RRC) message. The base stations105included in the set and/or the resources included the set may be updated via an RRC message.

In some cases, the UE115may be configured to refrain from communicating (e.g., receiving downlink transmission, transmitting uplink transmissions) during each resource included in the set of SSB resources. Additionally or alternatively, the UE115may be configured to refrain from transmitting a number of time resources before (e.g., one symbol) and a number of time resources after (e.g., one symbol) each set of consecutive SSB resources in the set of SSB resources. UE115-amay receive an indication to avoid communicating in such SSB resources, or may otherwise be configured to do so. For example, UE115-amay receive the indication of the set of SSB resources associated with each neighboring base station105, such as base station105-b, and may identify each set of consecutive SSB resources (e.g., continuous SSB resources) within the larger set. For each set of consecutive SSB resources, UE115-amay determine one resource (e.g., one symbol) before the set and one resource (e.g., one symbol) after the set of consecutive SSB resources. UE115-amay refrain from communicating during each SSB resource indicated in the set, and refrain from communicating during each symbol before (e.g., immediately before, adjacent) and each symbol after (e.g., immediately before, adjacent) each set of consecutive SSB resources.

In some cases, SSBs may be layer specific. For example, some SSBs may be configured for lower layer measurement (e.g., L1 measurement) and some may be configured for higher layer measurement. For example, a base station105may be configured for lower layer mobility, but one or more SSB resources associated with the base station105may not be configured for lower layer measurement by a UE115. In some cases, such SSB resources may be excluded from the set even if the base station105is a candidate neighboring base station105such that one or more other SSB resources (e.g., lower layer configured SSB resources) of the base station105are included in the set. As such, the UE115may communicate during such SSB resources (e.g., higher layer SSB resources) excluded from the set. In some cases, the SSB resources that are not configured for lower layer measurement may be included in the set, such that the UE115may be configured to refrain from communicating during such SSB resources, even though the SSB resource may not be configured for lower layer measurement.

In some implementations, the UE115may receive an indication (e.g., an additional indication) of a subset of the set of SSB resources. The indication of the set of SSB resources and the indication of the subset of SSB resources may be included in the same message, or different messages. In some cases, the UE115may explicitly or implicitly determine the SSB resources included in the subset based on group information (e.g., a group identifier identifying a group of base stations105included in the subset) or based on a PCI of each base station105included in the subset. For example, the indication of the subset of SSB resources may include an explicit indication of each PCI and/or each SSB resource included in the subset. If the indication includes the PCI of each base station105included in the group, the UE115may determine, from the indication of the set, the SSB resources associated with each PCI indicated in the subset. Base stations105, and the SSB resources associated with each base station105included in the subset may be based on the mobility or a mobility pattern of the UE115, based on proximity of the base station105to the UE115, etc. The UE115may receive an indication or otherwise be configured to refrain from communicating during each resource included in the subset. For example, receiving the indication of the subset may be an implicit indication for the UE115to refrain from communicating during each SSB resource in the subset, rather than the set.

As described herein, the UE115may refrain from transmitting a number of time resources before (e.g., one symbol) and a number of time resources after (e.g., one symbol) each set of consecutive SSB resources in the subset of SSB resources. UE115-amay receive an indication to avoid communicating in such SSB resources, or may otherwise be configured to do so. For example, UE115-amay receive the indication of the subset of SSB resources, and may identify each set of consecutive SSB resources (e.g., continuous SSB resources) within the larger subset. For each set of consecutive SSB resources, UE115-amay determine one resource (e.g., one symbol) before the set and one resource (e.g., one symbol) after the set of consecutive SSB resources. UE115-amay refrain from communicating during each SSB resource indicated in the subset, and refrain from communicating during each symbol before (e.g., immediately before, adjacent) and each symbol after (e.g., immediately before, adjacent) each set of consecutive SSB resources.

In some implementations, the UE115may monitor for SSB transmissions during the set of SSB resources and/or the subset of SSB resources. The UE may measure one or more parameters (e.g., RSRP, RSRQ, SINR) of the one or more received SSB transmissions, where the SSB transmissions may be transmitted by a serving base station105or neighboring base station105. The UE115may measure the one or more received SSB transmissions to determine the beam (e.g., a preferred beam) over which the UE115receives a highest (or high) power and/or quality signal. In some cases, the UE115may transmit a measurement report for one or more of the received SSB transmissions, such as one or more SSB transmissions with the highest measurements (e.g., highest quality, highest power), and/or the UE115may transmit a measurement report for each of the received SSB transmissions. The UE115may be configured to measure and transmit a measurement report for SSB transmissions in SSB resources that are configured for lower layer (e.g., L1) reporting, and SSB transmissions in SSB resources that are not configured for lower layer (e.g., L1) reporting. For example, if the SSB resource is included in the set or subset, even if the UE115has not received an indication that a certain SSB resource or SSB transmission is configured for L1 reporting, the UE115may perform L1-based measurements and report the L1-based measurements (e.g., autonomously).

In some implementations, the UE115may be configured to report SSB measurements based on an event (e.g., an A1, A2, A3 trigger), rather than the SSB being configured for lower layer-based measurement and reporting. For example, a trigger may include the UE115measuring an SSB transmission with a higher signal strength or quality than any SSB transmission from the serving base station105of the UE115. In some cases, a trigger may include an SSB measurement above a threshold. Upon such determination, the UE115may be triggered to transmit a report associated with the SSB transmission from the neighboring base station105or serving base station105. As such, the UE115may (autonomously) measure and report on SSB transmissions of a high quality or signal strength via an event-triggered report when any SSB transmission has a measurement above a threshold or that which is higher than the SSB measurements of the serving base station105, even if the SSB transmissions were not configured for L1 reporting for the UE115. The UE115may transmit a separate report for each SSB transmission the UE115determines to report on, or the UE115may transmit one report including one or more SSB measurements. The UE may transmit the report to the serving base station105of the UE115.

For example, base station105-amay be configured to transmit SSB transmissions over beams205-a,205-b, and205-c, in a first set of SSB resources and base station105-bmay be configured to transmit SSB transmissions over beams205-d,205-e, and205-f, in a second set of SSB resources. The first set of SSB resources and the second set of SSB resources may overlap, or partially overlap. Base station105-amay receive an indication or otherwise identify that base station105-bis a neighboring base station105-bto UE115-band include the second set of SSB resources in a set of SSB resources, along with first set of SSB resources. Base station105-amay transmit SSB configuration information215to UE115-athat may indicate base station105-aand base station105-b, such as by the corresponding PCIs of the two base stations105, and may indicate the set of SSB resources (e.g., the set of SSB resources including the first set and the second set of SSB resources). The indication may include an association of the first set of SSB resources with base station105-aand the second set of resources with base station105-b. Additionally or alternatively, UE115-amay receive an indication of a subset of the set of SSB resources. UE115-amay be configured to refrain from communicating during the SSB resources in the set, and/or the subset. For example, if UE115-areceives an indication of the subset, UE115-amay refrain from communicating in just the subset of SSB resources. In another example, if UE115-adoes not receive the indication of the subset, UE115-amay refrain from communicating during the full set of SSB resources. In some cases, UE115-amay monitor for and measure any SSB transmission received in the set of SSB resources or the subset of SSB resources, based on the indications received by UE115-a. UE115-amay transmit one or more measurement reports to base station105-athat indicate one or more SSB measurements, one or more SSB transmissions, and/or one or more beams205(e.g., preferred beams205).

In some cases, the SSB measurements included in the one or more reports may be based on a trigger. For example, UE115-amay include SSB measurements in the one or more reports based on the SSB measurements being above a threshold, or based on the SSB measurements, such as SSB measurements associated with neighboring base station105-b, being higher than the SSB measurements from serving base station105-a. In some cases, UE115-amay request a handover procedure based on the SSB measurements, such as if UE115-areceives a higher measured SSB from neighboring base station105-bthan from serving base station105-a. Base station105-amay receive the one or more reports, and determine a beam205to communicate with UE115-abased on the one or more reports. In some cases, base station105-amay initiate a handover procedure of UE115-afrom serving base station105-ato neighboring base station105-bbased on the one or more reports and/or based on a request from UE115-a. Although described with reference to lower layer mobility, the techniques described herein may be used in any mobility scenario such as in higher layer mobility.

FIG.3illustrates an example of a process flow300that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The process flow300may illustrate an example SSB monitoring and measurement scheme. For example, UE115-bmay monitor for SSB transmissions from at least base station105-cfor beam selection or handover. Base station105-cand UE115-bmay be examples of the corresponding wireless devices described with reference toFIGS.1and2. In some cases, instead of UE115-bimplementing the SSB monitoring and measurement procedure, a different type of wireless device (e.g., a base station105) may perform the procedure. Alternative examples of the following may be implemented, where some steps are performed in a different order than described or are not performed at all. In some cases, steps may include additional features not mentioned below, or further steps may be added.

At305, UE115-bmay receive, from serving base station105-c, a message indicating a set of SSB resources reserved for synchronization signal transmission by serving base station105-cand by one or more neighbor base stations105. The set of SSB resources may include a first portion of resources associated with serving base station105-cand one or more additional portions of resources associated with respective ones of the one or more neighbor base stations105. The first portion of resources associated with serving base station105-cand the one or more additional portions of resources with respective ones of the one or more neighbor base stations105partially overlap in a time-domain. In some cases, receiving the message indicating the set of SSB resources, includes UE115-breceiving an RRC signal including the message indicating the set of SSB resources.

At310, UE115-bmay identify two or more symbols which are adjacent consecutive SSB resources of the set of SSB resources.

At315, UE115-bmay exclude the two or more symbols from being used for communications between UE115-band serving base station105-cbased on the two or more symbols being adjacent to consecutive SSB resources. For example, UE115-bmay not transmit or receive messages from base station105-cduring the excluded symbols. In some cases, UE115-bmay exclude the set of SSB resources from being used for communications between the UE and the serving base station. UE115-bmay exclude an adjacent symbol prior to each SSB resource of the set of SSB resources and an adjacent symbol after each SSB resource of the set of SSB resources from being used for communications between UE115-band serving base station105-c.

In some cases, UE115-bmay receive a second message indicating a subset of SSB resources of the set of SSB resources to be excluded from being used for communications between UE115-band serving base station105-c. UE115-bmay exclude the subset of SSB resources from being used for communications between UE115-band serving base station105-cbased on the second message. UE115-bmay exclude an adjacent symbol prior to each SSB resource of the subset of SSB resources and an adjacent symbol after each SSB resource of the subset of SSB resources from being used for communications between UE115-band serving base station105-c.

In some implementations, UE115-bmay receive an indication of a set of PCIs, the indication may include an association between each SSB resource of the set of SSB resources and a PCI of the set of PCIs. In some cases, UE115-bmay receive the second message, the second message including a subset of PCIs of the set of PCIs. The subset of PCIs may implicitly indicate the subset of SSB resources based on the association. Serving base station105-cmay be associated with a first PCI of the set of PCIs, and each neighbor base station105of the one or more neighbor base stations105may be associated with a different PCI of the set of PCIs.

In some cases, UE115-bmay receive a second message indicating a subset of SSB resources of the set of SSB resources that are configured for UE115-bto measure and report on. UE115-bmay monitor for SSB transmissions in the subset of SSB resources based on the second message, measure a quality of a set of SSB transmissions received by UE115-bduring the subset of SSB resources, and transmit, to serving base station105-c, a report indicating the SSB with a highest measured quality (or power). UE115-bmay initiate a handover procedure with serving base station105-cand a neighbor base station105of the one or more neighbor base stations105based on the neighbor base station105being associated with the SSB with the highest measured quality. In some cases, serving base station105-cmay initiate the handover procedure based on the report from UE115-c. The handover procedure may be a lower layer handover procedure. The lower layer handover procedure may include physical layer signaling, or MAC signaling, or both.

In some cases, UE115-bmay monitor for SSB transmissions in the set of SSB resources based on the message, and measure a quality of a set of SSB transmissions received by UE115-bduring the set of SSB resources. UE115-bmay determine an SSB transmission of the set of SSB transmissions with a highest measured quality, where the SSB transmission with the highest measured quality may not have been received in the subset of SSB resources. UE115-bmay transmit, to serving base station105-c, a report indicating the SSB with the highest measured quality. UE115-bmay initiate a handover procedure with serving base station105-cand a neighbor base station105of the one or more neighbor base stations105based on the neighbor base station105being associated with the SSB with the highest measured quality. The handover procedure may be a lower layer handover procedure. The lower layer handover procedure may include physical layer signaling, or MAC signaling, or both.

At320, base station105-cmay identify two or more symbols which are adjacent consecutive SSB resources of the set of SSB resources.

At325, base station105-cmay exclude the two or more symbols from being used for communications between UE115-band base station105-cbased on the two or more symbols being adjacent to consecutive SSB resources. For example, base station105-cmay not transmit or receive messages from UE115-bduring the excluded symbols.

At330, UE115-bmay communicate with serving base station105-con symbols other than the two or more symbols.

FIG.4shows a block diagram400of a device405that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The device405may be an example of aspects of a UE115as described herein. The device405may include a receiver410, a transmitter415, and a communications manager420. The device405may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver410may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for channel measurement and reporting for lower layer mobility). Information may be passed on to other components of the device405. The receiver410may utilize a single antenna or a set of multiple antennas.

The transmitter415may provide a means for transmitting signals generated by other components of the device405. For example, the transmitter415may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for channel measurement and reporting for lower layer mobility). In some examples, the transmitter415may be co-located with a receiver410in a transceiver module. The transmitter415may utilize a single antenna or a set of multiple antennas.

The communications manager420, the receiver410, the transmitter415, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein. For example, the communications manager420, the receiver410, the transmitter415, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager420may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver410, the transmitter415, or both. For example, the communications manager420may receive information from the receiver410, send information to the transmitter415, or be integrated in combination with the receiver410, the transmitter415, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager420may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager420may be configured as or otherwise support a means for receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The communications manager420may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The communications manager420may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The communications manager420may be configured as or otherwise support a means for communicating with the serving base station on symbols other than the two or more symbols.

By including or configuring the communications manager420in accordance with examples as described herein, the device405(e.g., a processor controlling or otherwise coupled to the receiver410, the transmitter415, the communications manager420, or a combination thereof) may support techniques for more efficient utilization of communication resources and increased reliability.

The receiver510may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for channel measurement and reporting for lower layer mobility). Information may be passed on to other components of the device505. The receiver510may utilize a single antenna or a set of multiple antennas.

The transmitter515may provide a means for transmitting signals generated by other components of the device505. For example, the transmitter515may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for channel measurement and reporting for lower layer mobility). In some examples, the transmitter515may be co-located with a receiver510in a transceiver module. The transmitter515may utilize a single antenna or a set of multiple antennas.

The device505, or various components thereof, may be an example of means for performing various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein. For example, the communications manager520may include an SSB resource set indication manager525, an adjacent symbol identification manager530, an adjacent symbol exclusion manager535, a serving base station communications manager540, or any combination thereof. The communications manager520may be an example of aspects of a communications manager420as described herein. In some examples, the communications manager520, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver510, the transmitter515, or both. For example, the communications manager520may receive information from the receiver510, send information to the transmitter515, or be integrated in combination with the receiver510, the transmitter515, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager520may support wireless communications at a UE in accordance with examples as disclosed herein. The SSB resource set indication manager525may be configured as or otherwise support a means for receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The adjacent symbol identification manager530may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The adjacent symbol exclusion manager535may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The serving base station communications manager540may be configured as or otherwise support a means for communicating with the serving base station on symbols other than the two or more symbols.

FIG.6shows a block diagram600of a communications manager620that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The communications manager620may be an example of aspects of a communications manager420, a communications manager520, or both, as described herein. The communications manager620, or various components thereof, may be an example of means for performing various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein. For example, the communications manager620may include an SSB resource set indication manager625, an adjacent symbol identification manager630, an adjacent symbol exclusion manager635, a serving base station communications manager640, an SSB resource set exclusion manager645, an SSB resource subset indication manager650, an SSB resource subset exclusion manager655, a PCI indication manager660, an SSB monitoring manager665, an SSB measurement manager670, an SSB report manager675, a handover initiation manager680, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager620may support wireless communications at a UE in accordance with examples as disclosed herein. The SSB resource set indication manager625may be configured as or otherwise support a means for receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The adjacent symbol identification manager630may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The adjacent symbol exclusion manager635may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The serving base station communications manager640may be configured as or otherwise support a means for communicating with the serving base station on symbols other than the two or more symbols.

In some examples, the SSB resource set exclusion manager645may be configured as or otherwise support a means for excluding the set of multiple SSB resources from being used for communications between the UE and the serving base station.

In some examples, to support excluding the two or more symbols, the adjacent symbol identification manager630may be configured as or otherwise support a means for excluding an adjacent symbol prior to each SSB resource of the set of multiple SSB resources and an adjacent symbol after each SSB resource of the set of multiple SSB resources from being used for communications between the UE and the serving base station.

In some examples, the message is a first message, and the SSB resource subset indication manager650may be configured as or otherwise support a means for receiving a second message indicating a subset of SSB resources of the set of multiple SSB resources to be excluded from being used for communications between the UE and the serving base station.

In some examples, the SSB resource subset exclusion manager655may be configured as or otherwise support a means for excluding the subset of SSB resources from being used for communications between the UE and the serving base station based on the second message.

In some examples, to support excluding the two or more symbols, the adjacent symbol exclusion manager635may be configured as or otherwise support a means for excluding an adjacent symbol prior to each SSB resource of the subset of SSB resources and an adjacent symbol after each SSB resource of the subset of SSB resources from being used for communications between the UE and the serving base station.

In some examples, to support receiving the first message indicating the set of multiple SSB resources, the PCI indication manager660may be configured as or otherwise support a means for receiving an indication of a set of multiple PCIs, the indication including an association between each SSB resource of the set of multiple SSB resources and a PCI of the set of multiple PCIs.

In some examples, to support receiving the second message indicating the subset of SSB resources, the PCI indication manager660may be configured as or otherwise support a means for receiving the second message, the second message including a subset of PCIs of the set of multiple PCIs, the subset of PCIs implicitly indicating the subset of SSB resources based on the association.

In some examples, the serving base station is associated with a first PCI of the set of multiple PCIs, and each neighbor base station of the one or more neighbor base stations is associated with a different PCI of the set of multiple PCIs.

In some examples, the message is a first message, and the SSB resource subset indication manager650may be configured as or otherwise support a means for receiving a second message indicating a subset of SSB resources of the set of multiple SSB resources that are configured for the UE to measure and report on.

In some examples, the SSB monitoring manager665may be configured as or otherwise support a means for monitoring for SSB transmissions in the subset of SSB resources based on the second message. In some examples, the SSB measurement manager670may be configured as or otherwise support a means for measuring a quality of a set of multiple SSB transmissions received by the UE during the subset of SSB resources. In some examples, the SSB report manager675may be configured as or otherwise support a means for transmitting, to the serving base station, a report indicating the SSB with a highest measured quality.

In some examples, the handover initiation manager680may be configured as or otherwise support a means for initiating a handover procedure with the serving base station and a neighbor base station of the one or more neighbor base stations based on the neighbor base station being associated with the SSB with the highest measured quality, the handover procedure a lower layer handover procedure.

In some examples, the lower layer handover procedure includes physical layer signaling, or MAC signaling, or both.

In some examples, the SSB monitoring manager665may be configured as or otherwise support a means for monitoring for SSB transmissions in the set of multiple SSB resources based on the first message. In some examples, the SSB measurement manager670may be configured as or otherwise support a means for measuring a quality of a set of multiple SSB transmissions received by the UE during the set of multiple SSB resources. In some examples, the SSB measurement manager670may be configured as or otherwise support a means for determining a SSB transmission of the set of multiple SSB transmissions with a highest measured quality, the SSB transmission with the highest measured quality not received in the subset of SSB resources. In some examples, the SSB report manager675may be configured as or otherwise support a means for transmitting, to the serving base station, a report indicating the SSB with the highest measured quality.

In some examples, the handover initiation manager680may be configured as or otherwise support a means for initiating a handover procedure with the serving base station and a neighbor base station of the one or more neighbor base stations based on the neighbor base station being associated with the SSB with the highest measured quality, the handover procedure a lower layer handover procedure.

In some examples, the lower layer handover procedure includes physical layer signaling, or MAC signaling, or both.

In some examples, the first portion of resources associated with the serving base station and the one or more additional portions of resources with respective ones of the one or more neighbor base stations partially overlap in a time-domain.

In some examples, to support receiving the message indicating the set of multiple SSB resources, the SSB resource set indication manager625may be configured as or otherwise support a means for receiving an RRC signal including the message indicating the set of multiple SSB resources.

FIG.7shows a diagram of a system700including a device705that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The device705may be an example of or include the components of a device405, a device505, or a UE115as described herein. The device705may communicate wirelessly with one or more base stations105, UEs115, or any combination thereof. The device705may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager720, an input/output (I/O) controller710, a transceiver715, an antenna725, a memory730, code735, and a processor740. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus745).

The I/O controller710may manage input and output signals for the device705. The I/O controller710may also manage peripherals not integrated into the device705. In some cases, the I/O controller710may represent a physical connection or port to an external peripheral. In some cases, the I/O controller710may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system. Additionally or alternatively, the I/O controller710may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller710may be implemented as part of a processor, such as the processor740. In some cases, a user may interact with the device705via the I/O controller710or via hardware components controlled by the I/O controller710.

In some cases, the device705may include a single antenna725. However, in some other cases, the device705may have more than one antenna725, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver715may communicate bi-directionally, via the one or more antennas725, wired, or wireless links as described herein. For example, the transceiver715may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver715may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas725for transmission, and to demodulate packets received from the one or more antennas725. The transceiver715, or the transceiver715and one or more antennas725, may be an example of a transmitter415, a transmitter515, a receiver410, a receiver510, or any combination thereof or component thereof, as described herein.

The memory730may include random access memory (RAM) and read-only memory (ROM). The memory730may store computer-readable, computer-executable code735including instructions that, when executed by the processor740, cause the device705to perform various functions described herein. The code735may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code735may not be directly executable by the processor740but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory730may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor740may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor740may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor740. The processor740may be configured to execute computer-readable instructions stored in a memory (e.g., the memory730) to cause the device705to perform various functions (e.g., functions or tasks supporting techniques for channel measurement and reporting for lower layer mobility). For example, the device705or a component of the device705may include a processor740and memory730coupled to the processor740, the processor740and memory730configured to perform various functions described herein.

The communications manager720may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager720may be configured as or otherwise support a means for receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The communications manager720may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The communications manager720may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The communications manager720may be configured as or otherwise support a means for communicating with the serving base station on symbols other than the two or more symbols.

By including or configuring the communications manager720in accordance with examples as described herein, the device705may support techniques for improved communication reliability, more efficient utilization of communication resources, and improved coordination between devices.

In some examples, the communications manager720may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver715, the one or more antennas725, or any combination thereof. Although the communications manager720is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager720may be supported by or performed by the processor740, the memory730, the code735, or any combination thereof. For example, the code735may include instructions executable by the processor740to cause the device705to perform various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein, or the processor740and the memory730may be otherwise configured to perform or support such operations.

The receiver810may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for channel measurement and reporting for lower layer mobility). Information may be passed on to other components of the device805. The receiver810may utilize a single antenna or a set of multiple antennas.

The communications manager820, the receiver810, the transmitter815, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein. For example, the communications manager820, the receiver810, the transmitter815, or various combinations or components thereof may support a method for performing one or more of the functions described herein.

In some examples, the communications manager820may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver810, the transmitter815, or both. For example, the communications manager820may receive information from the receiver810, send information to the transmitter815, or be integrated in combination with the receiver810, the transmitter815, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager820may support wireless communications at a base station in accordance with examples as disclosed herein. For example, the communications manager820may be configured as or otherwise support a means for transmitting, to a UE, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the base station and by one or more neighbor base stations to the UE, the set of multiple SSB resources including a first portion of resources associated with the base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The communications manager820may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The communications manager820may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the base station based on the two or more symbols being adjacent to the consecutive SSB resources. The communications manager820may be configured as or otherwise support a means for communicating with the UE on symbols other than the two or more symbols.

By including or configuring the communications manager820in accordance with examples as described herein, the device805(e.g., a processor controlling or otherwise coupled to the receiver810, the transmitter815, the communications manager820, or a combination thereof) may support techniques for more efficient utilization of communication resources, and improved reliability.

The device905, or various components thereof, may be an example of means for performing various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein. For example, the communications manager920may include an SSB resource set indication component925, an adjacent symbol identification component930, an adjacent symbol exclusion component935, a non-excluded symbols communication component940, or any combination thereof. The communications manager920may be an example of aspects of a communications manager820as described herein. In some examples, the communications manager920, or various components thereof, may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the receiver910, the transmitter915, or both. For example, the communications manager920may receive information from the receiver910, send information to the transmitter915, or be integrated in combination with the receiver910, the transmitter915, or both to receive information, transmit information, or perform various other operations as described herein.

The communications manager920may support wireless communications at a base station in accordance with examples as disclosed herein. The SSB resource set indication component925may be configured as or otherwise support a means for transmitting, to a UE, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the base station and by one or more neighbor base stations to the UE, the set of multiple SSB resources including a first portion of resources associated with the base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The adjacent symbol identification component930may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The adjacent symbol exclusion component935may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the base station based on the two or more symbols being adjacent to the consecutive SSB resources. The non-excluded symbols communication component940may be configured as or otherwise support a means for communicating with the UE on symbols other than the two or more symbols.

FIG.10shows a block diagram1000of a communications manager1020that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The communications manager1020may be an example of aspects of a communications manager820, a communications manager920, or both, as described herein. The communications manager1020, or various components thereof, may be an example of means for performing various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein. For example, the communications manager1020may include an SSB resource set indication component1025, an adjacent symbol identification component1030, an adjacent symbol exclusion component1035, a non-excluded symbols communication component1040, an SSB resource set exclusion component1045, an SSB resource subset indication component1050, an SSB resource subset exclusion component1055, a PCI indication component1060, an SSB report component1065, a handover procedure component1070, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The communications manager1020may support wireless communications at a base station in accordance with examples as disclosed herein. The SSB resource set indication component1025may be configured as or otherwise support a means for transmitting, to a UE, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the base station and by one or more neighbor base stations to the UE, the set of multiple SSB resources including a first portion of resources associated with the base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The adjacent symbol identification component1030may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The adjacent symbol exclusion component1035may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the base station based on the two or more symbols being adjacent to the consecutive SSB resources. The non-excluded symbols communication component1040may be configured as or otherwise support a means for communicating with the UE on symbols other than the two or more symbols.

In some examples, the SSB resource set exclusion component1045may be configured as or otherwise support a means for excluding the set of multiple SSB resources from being used for communications between the UE and the base station.

In some examples, to support excluding the two or more symbols, the adjacent symbol exclusion component1035may be configured as or otherwise support a means for excluding an adjacent symbol prior to each SSB resource of the set of multiple SSB resources and an adjacent symbol after each SSB resource of the set of multiple SSB resources from being used for communications between the UE and serving base station.

In some examples, the message is a first message, and the SSB resource subset indication component1050may be configured as or otherwise support a means for transmitting a second message indicating a subset of SSB resources of the set of multiple SSB resources to be excluded from being used for communications between the UE and the base station.

In some examples, the SSB resource subset exclusion component1055may be configured as or otherwise support a means for excluding the subset of SSB resources from being used for communications between the UE and the base station based on the second message.

In some examples, to support excluding the two or more symbols, the adjacent symbol exclusion component1035may be configured as or otherwise support a means for excluding an adjacent symbol prior to each SSB resource of the subset of SSB resources and an adjacent symbol after each SSB resource of the subset of SSB resources from being used for communications between the UE and the base station.

In some examples, to support transmitting the first message indicating the set of multiple SSB resources, the PCI indication component1060may be configured as or otherwise support a means for transmitting an indication of a set of multiple PCIs, the indication including an association between each SSB resource of the set of multiple SSB resources and a PCI of the set of multiple PCIs.

In some examples, to support receiving the second message indicating the subset of SSB resources, the PCI indication component1060may be configured as or otherwise support a means for receiving the second message, the second message including a subset of PCIs of the set of multiple PCIs, the subset of PCIs implicitly indicating the subset of SSB resources based on the association.

In some examples, the base station is associated with a first PCI of the set of multiple PCIs, and each neighbor base station of the one or more neighbor base stations is associated with a different PCI of the set of multiple PCIs.

In some examples, the message is a first message, and the SSB resource subset indication component1050may be configured as or otherwise support a means for transmitting a second message indicating a subset of SSB resources of the set of multiple SSB resources that are configured for the UE to measure and report on.

In some examples, the SSB report component1065may be configured as or otherwise support a means for receiving, from the UE, a report indicating a SSB with a highest measured quality, the SSB transmitted in the subset of SSB resources.

In some examples, the handover procedure component1070may be configured as or otherwise support a means for performing a handover procedure with the UE and a neighbor base station of the one or more neighbor base stations based on the neighbor base station being associated with the SSB with the highest measured quality, the handover procedure a lower layer handover procedure.

In some examples, the lower layer handover procedure includes physical layer signaling, or MAC signaling, or both.

In some examples, the SSB report component1065may be configured as or otherwise support a means for receiving, from the UE, a report indicating a SSB with a highest measured quality, the SSB not transmitted in the subset of SSB resources.

In some examples, the handover procedure component1070may be configured as or otherwise support a means for performing a handover procedure with the UE and a neighbor base station of the one or more neighbor base stations based on the neighbor base station being associated with the SSB with the highest measured quality, the handover procedure a lower layer handover procedure.

In some examples, the lower layer handover procedure includes physical layer signaling, or MAC signaling, or both.

In some examples, the first portion of resources associated with the base station and the one or more additional portions of resources with respective ones of the one or more neighbor base stations partially overlap in a time-domain.

In some examples, to support transmitting the message indicating the set of multiple SSB resources, the SSB resource set indication component1025may be configured as or otherwise support a means for transmitting an RRC signal including the message indicating the set of multiple SSB resources.

FIG.11shows a diagram of a system1100including a device1105that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The device1105may be an example of or include the components of a device805, a device905, or a base station105as described herein. The device1105may communicate wirelessly with one or more base stations105, UEs115, or any combination thereof. The device1105may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager1120, a network communications manager1110, a transceiver1115, an antenna1125, a memory1130, code1135, a processor1140, and an inter-station communications manager1145. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus1150).

The network communications manager1110may manage communications with a core network130(e.g., via one or more wired backhaul links). For example, the network communications manager1110may manage the transfer of data communications for client devices, such as one or more UEs115.

The memory1130may include RAM and ROM. The memory1130may store computer-readable, computer-executable code1135including instructions that, when executed by the processor1140, cause the device1105to perform various functions described herein. The code1135may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code1135may not be directly executable by the processor1140but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory1130may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor1140may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor1140may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor1140. The processor1140may be configured to execute computer-readable instructions stored in a memory (e.g., the memory1130) to cause the device1105to perform various functions (e.g., functions or tasks supporting techniques for channel measurement and reporting for lower layer mobility). For example, the device1105or a component of the device1105may include a processor1140and memory1130coupled to the processor1140, the processor1140and memory1130configured to perform various functions described herein.

The communications manager1120may support wireless communications at a base station in accordance with examples as disclosed herein. For example, the communications manager1120may be configured as or otherwise support a means for transmitting, to a UE, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the base station and by one or more neighbor base stations to the UE, the set of multiple SSB resources including a first portion of resources associated with the base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The communications manager1120may be configured as or otherwise support a means for identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The communications manager1120may be configured as or otherwise support a means for excluding the two or more symbols from being used for communications between the UE and the base station based on the two or more symbols being adjacent to the consecutive SSB resources. The communications manager1120may be configured as or otherwise support a means for communicating with the UE on symbols other than the two or more symbols.

By including or configuring the communications manager1120in accordance with examples as described herein, the device1105may support techniques for improved communication reliability, more efficient utilization of communication resources, and improved coordination between devices.

In some examples, the communications manager1120may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver1115, the one or more antennas1125, or any combination thereof. Although the communications manager1120is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager1120may be supported by or performed by the processor1140, the memory1130, the code1135, or any combination thereof. For example, the code1135may include instructions executable by the processor1140to cause the device1105to perform various aspects of techniques for channel measurement and reporting for lower layer mobility as described herein, or the processor1140and the memory1130may be otherwise configured to perform or support such operations.

FIG.12shows a flowchart illustrating a method1200that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The operations of the method1200may be implemented by a UE or components of the UE as described herein. For example, the operations of the method1200may be performed by a UE115as described with reference toFIGS.1through7. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1205, the method may include receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The operations of1205may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1205may be performed by an SSB resource set indication manager625as described with reference toFIG.6.

At1210, the method may include identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The operations of1210may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1210may be performed by an adjacent symbol identification manager630as described with reference toFIG.6.

At1215, the method may include excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The operations of1215may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1215may be performed by an adjacent symbol exclusion manager635as described with reference toFIG.6.

At1220, the method may include communicating with the serving base station on symbols other than the two or more symbols. The operations of1220may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1220may be performed by a serving base station communications manager640as described with reference toFIG.6.

FIG.13shows a flowchart illustrating a method1300that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The operations of the method1300may be implemented by a UE or components of the UE as described herein. For example, the operations of the method1300may be performed by a UE115as described with reference toFIGS.1through7. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1305, the method may include receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The operations of1305may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1305may be performed by an SSB resource set indication manager625as described with reference toFIG.6.

At1310, the method may include identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The operations of1310may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1310may be performed by an adjacent symbol identification manager630as described with reference toFIG.6.

At1315, the method may include excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The operations of1315may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1315may be performed by an adjacent symbol exclusion manager635as described with reference toFIG.6.

At1320, the method may include excluding the set of multiple SSB resources from being used for communications between the UE and the serving base station. The operations of1320may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1320may be performed by an SSB resource set exclusion manager645as described with reference toFIG.6.

At1325, the method may include communicating with the serving base station on symbols other than the two or more symbols. The operations of1325may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1325may be performed by a serving base station communications manager640as described with reference toFIG.6.

FIG.14shows a flowchart illustrating a method1400that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The operations of the method1400may be implemented by a UE or components of the UE as described herein. For example, the operations of the method1400may be performed by a UE115as described with reference toFIGS.1through7. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At1405, the method may include receiving, from a serving base station, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the set of multiple SSB resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The operations of1405may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1405may be performed by an SSB resource set indication manager625as described with reference toFIG.6.

At1410, the method may include receiving a second message indicating a subset of SSB resources of the set of multiple SSB resources to be excluded from being used for communications between the UE and the serving base station. The operations of1410may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1410may be performed by an SSB resource subset indication manager650as described with reference toFIG.6.

At1415, the method may include identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The operations of1415may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1415may be performed by an adjacent symbol identification manager630as described with reference toFIG.6.

At1420, the method may include excluding the two or more symbols from being used for communications between the UE and the serving base station based on the two or more symbols being adjacent to the consecutive SSB resources. The operations of1420may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1420may be performed by an adjacent symbol exclusion manager635as described with reference toFIG.6.

At1425, the method may include excluding the subset of SSB resources from being used for communications between the UE and the serving base station based on the second message. The operations of1425may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1425may be performed by an SSB resource subset exclusion manager655as described with reference toFIG.6.

At1430, the method may include communicating with the serving base station on symbols other than the two or more symbols. The operations of1430may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1430may be performed by a serving base station communications manager640as described with reference toFIG.6.

FIG.15shows a flowchart illustrating a method1500that supports techniques for channel measurement and reporting for lower layer mobility in accordance with aspects of the present disclosure. The operations of the method1500may be implemented by a base station or components of the UE as described herein. For example, the operations of the method1500may be performed by a base station105as described with reference toFIGS.1through3and8through11. In some examples, a base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may perform aspects of the described functions using special-purpose hardware.

At1505, the method may include transmitting, to a UE, a message indicating a set of multiple SSB resources reserved for synchronization signal transmission by the base station and by one or more neighbor base stations to the UE, the set of multiple SSB resources including a first portion of resources associated with the base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations. The operations of1505may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1505may be performed by an SSB resource set indication component1025as described with reference toFIG.10.

At1510, the method may include identifying two or more symbols which are adjacent to consecutive SSB resources of the set of multiple SSB resources. The operations of1510may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1510may be performed by an adjacent symbol identification component1030as described with reference toFIG.10.

At1515, the method may include excluding the two or more symbols from being used for communications between the UE and the base station based on the two or more symbols being adjacent to the consecutive SSB resources. The operations of1515may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1515may be performed by an adjacent symbol exclusion component1035as described with reference toFIG.10.

At1520, the method may include communicating with the UE on symbols other than the two or more symbols. The operations of1520may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of1520may be performed by a non-excluded symbols communication component1040as described with reference toFIG.10.

The following aspects are given by way of illustration. Examples of the following aspects may be combined with examples or embodiments shown or discussed in relation to the figures or elsewhere herein.

Aspect 1: A method for wireless communications at a UE, comprising: receiving, from a serving base station, a message indicating a plurality of synchronization signal block resources reserved for synchronization signal transmission by the serving base station and by one or more neighbor base stations, the plurality of synchronization signal block resources including a first portion of resources associated with the serving base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations; identifying two or more symbols which are adjacent to consecutive synchronization signal block resources of the plurality of synchronization signal block resources; excluding the two or more symbols from being used for communications between the UE and the serving base station based at least in part on the two or more symbols being adjacent to the consecutive synchronization signal block resources; and communicating with the serving base station on symbols other than the two or more symbols.

Aspect 2: The method of aspect 1, further comprising: excluding the plurality of synchronization signal block resources from being used for communications between the UE and the serving base station.

Aspect 3: The method of aspect 2, wherein excluding the two or more symbols further comprises: excluding an adjacent symbol prior to each synchronization signal block resource of the plurality of synchronization signal block resources and an adjacent symbol after each synchronization signal block resource of the plurality of synchronization signal block resources from being used for communications between the UE and the serving base station.

Aspect 4: The method of any of aspects 1 through 3, wherein the message is a first message, the method further comprising: receiving a second message indicating a subset of synchronization signal block resources of the plurality of synchronization signal block resources to be excluded from being used for communications between the UE and the serving base station.

Aspect 5: The method of aspect 4, further comprising: excluding the subset of synchronization signal block resources from being used for communications between the UE and the serving base station based at least in part on the second message.

Aspect 6: The method of any of aspects 4 through 5, wherein excluding the two or more symbols further comprises: excluding an adjacent symbol prior to each synchronization signal block resource of the subset of synchronization signal block resources and an adjacent symbol after each synchronization signal block resource of the subset of synchronization signal block resources from being used for communications between the UE and the serving base station.

Aspect 7: The method of any of aspects 4 through 6, wherein receiving the first message indicating the plurality of synchronization signal block resources further comprises: receiving an indication of a plurality of physical cell identifiers, the indication comprising an association between each synchronization signal block resource of the plurality of synchronization signal block resources and a physical cell identifier of the plurality of physical cell identifiers.

Aspect 8: The method of aspect 7, wherein receiving the second message indicating the subset of synchronization signal block resources further comprises: receiving the second message, the second message comprising a subset of physical cell identifiers of the plurality of physical cell identifiers, the subset of physical cell identifiers implicitly indicating the subset of synchronization signal block resources based at least in part on the association.

Aspect 9: The method of any of aspects 7 through 8, wherein the serving base station is associated with a first physical cell identifier of the plurality of physical cell identifiers, and each neighbor base station of the one or more neighbor base stations is associated with a different physical cell identifier of the plurality of physical cell identifiers.

Aspect 10: The method of any of aspects 1 through 9, wherein the message is a first message, the method further comprising: receiving a second message indicating a subset of synchronization signal block resources of the plurality of synchronization signal block resources that are configured for the UE to measure and report on.

Aspect 11: The method of aspect 10, further comprising: monitoring for synchronization signal block transmissions in the subset of synchronization signal block resources based at least in part on the second message; measuring a quality of a plurality of synchronization signal block transmissions received by the UE during the subset of synchronization signal block resources; and transmitting, to the serving base station, a report indicating the synchronization signal block with a highest measured quality.

Aspect 12: The method of aspect 11, further comprising: initiating a handover procedure with the serving base station and a neighbor base station of the one or more neighbor base stations based at least in part on the neighbor base station being associated with the synchronization signal block with the highest measured quality, the handover procedure a lower layer handover procedure.

Aspect 13: The method of aspect 12, wherein the lower layer handover procedure comprises physical layer signaling, or medium access control signaling, or both.

Aspect 14: The method of any of aspects 10 through 13, further comprising: monitoring for synchronization signal block transmissions in the plurality of synchronization signal block resources based at least in part on the first message; measuring a quality of a plurality of synchronization signal block transmissions received by the UE during the plurality of synchronization signal block resources; determining a synchronization signal block transmission of the plurality of synchronization signal block transmissions with a highest measured quality, the synchronization signal block transmission with the highest measured quality not received in the subset of synchronization signal block resources; and transmitting, to the serving base station, a report indicating the synchronization signal block with the highest measured quality.

Aspect 15: The method of aspect 14, further comprising: initiating a handover procedure with the serving base station and a neighbor base station of the one or more neighbor base stations based at least in part on the neighbor base station being associated with the synchronization signal block with the highest measured quality, the handover procedure a lower layer handover procedure.

Aspect 16: The method of aspect 15, wherein the lower layer handover procedure comprises physical layer signaling, or medium access control signaling, or both.

Aspect 17: The method of any of aspects 1 through 16, wherein the first portion of resources associated with the serving base station and the one or more additional portions of resources with respective ones of the one or more neighbor base stations partially overlap in a time-domain.

Aspect 18: The method of any of aspects 1 through 17, wherein receiving the message indicating the plurality of synchronization signal block resources further comprises: receiving a radio resource control signal comprising the message indicating the plurality of synchronization signal block resources.

Aspect 19: A method for wireless communications at a base station, comprising: transmitting, to a UE, a message indicating a plurality of synchronization signal block resources reserved for synchronization signal transmission by the base station and by one or more neighbor base stations to the UE, the plurality of synchronization signal block resources including a first portion of resources associated with the base station and one or more additional portions of resources associated with respective ones of the one or more neighbor base stations; identifying two or more symbols which are adjacent to consecutive synchronization signal block resources of the plurality of synchronization signal block resources; excluding the two or more symbols from being used for communications between the UE and the base station based at least in part on the two or more symbols being adjacent to the consecutive synchronization signal block resources; and communicating with the UE on symbols other than the two or more symbols.

Aspect 20: The method of aspect 19, further comprising: excluding the plurality of synchronization signal block resources from being used for communications between the UE and the base station.

Aspect 21: The method of aspect 20, wherein excluding the two or more symbols further comprises: excluding an adjacent symbol prior to each synchronization signal block resource of the plurality of synchronization signal block resources and an adjacent symbol after each synchronization signal block resource of the plurality of synchronization signal block resources from being used for communications between the UE and serving base station.

Aspect 22: The method of any of aspects 19 through 21, wherein the message is a first message, the method further comprising: transmitting a second message indicating a subset of synchronization signal block resources of the plurality of synchronization signal block resources to be excluded from being used for communications between the UE and the base station.

Aspect 23: The method of aspect 22, further comprising: excluding the subset of synchronization signal block resources from being used for communications between the UE and the base station based at least in part on the second message.

Aspect 24: The method of any of aspects 22 through 23, wherein excluding the two or more symbols further comprises: excluding an adjacent symbol prior to each synchronization signal block resource of the subset of synchronization signal block resources and an adjacent symbol after each synchronization signal block resource of the subset of synchronization signal block resources from being used for communications between the UE and the base station.

Aspect 25: The method of any of aspects 22 through 24, wherein transmitting the first message indicating the plurality of synchronization signal block resources further comprises: transmitting an indication of a plurality of physical cell identifiers, the indication comprising an association between each synchronization signal block resource of the plurality of synchronization signal block resources and a physical cell identifier of the plurality of physical cell identifiers.

Aspect 26: The method of aspect 25, wherein receiving the second message indicating the subset of synchronization signal block resources further comprises: receiving the second message, the second message comprising a subset of physical cell identifiers of the plurality of physical cell identifiers, the subset of physical cell identifiers implicitly indicating the subset of synchronization signal block resources based at least in part on the association.

Aspect 27: The method of any of aspects 25 through 26, wherein the base station is associated with a first physical cell identifier of the plurality of physical cell identifiers, and each neighbor base station of the one or more neighbor base stations is associated with a different physical cell identifier of the plurality of physical cell identifiers.

Aspect 28: The method of any of aspects 19 through 27, wherein the message is a first message, the method further comprising: transmitting a second message indicating a subset of synchronization signal block resources of the plurality of synchronization signal block resources that are configured for the UE to measure and report on.

Aspect 29: The method of aspect 28, further comprising: receiving, from the UE, a report indicating a synchronization signal block with a highest measured quality, the synchronization signal block transmitted in the subset of synchronization signal block resources.

Aspect 30: The method of aspect 29, further comprising: performing a handover procedure with the UE and a neighbor base station of the one or more neighbor base stations based at least in part on the neighbor base station being associated with the synchronization signal block with the highest measured quality, the handover procedure a lower layer handover procedure.

Aspect 31: The method of aspect 30, wherein the lower layer handover procedure comprises physical layer signaling, or medium access control signaling, or both.

Aspect 32: The method of any of aspects 28 through 31, further comprising: receiving, from the UE, a report indicating a synchronization signal block with a highest measured quality, the synchronization signal block not transmitted in the subset of synchronization signal block resources.

Aspect 33: The method of aspect 32, further comprising: performing a handover procedure with the UE and a neighbor base station of the one or more neighbor base stations based at least in part on the neighbor base station being associated with the synchronization signal block with the highest measured quality, the handover procedure a lower layer handover procedure.

Aspect 34: The method of aspect 33, wherein the lower layer handover procedure comprises physical layer signaling, or medium access control signaling, or both.

Aspect 35: The method of any of aspects 19 through 34, wherein the first portion of resources associated with the base station and the one or more additional portions of resources with respective ones of the one or more neighbor base stations partially overlap in a time-domain.

Aspect 36: The method of any of aspects 19 through 35, wherein transmitting the message indicating the plurality of synchronization signal block resources further comprises: transmitting a radio resource control signal comprising the message indicating the plurality of synchronization signal block resources.

Aspect 41: An apparatus for wireless communications at a base station, comprising at least one means for performing a method of any of aspects 19 through 36.