Cell discontinuous transmission with synchronization signal block adaptation
SSB periodicity adaptation using MAC CE and DCI signaling addresses network energy savings and latency issues in wireless communication systems by dynamically adjusting SSB bursts and CDTX patterns, enhancing energy efficiency and UE performance.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2026-04-02
AI Technical Summary
Existing wireless communication systems face challenges in optimizing network energy savings by efficiently managing synchronization signal block (SSB) transmissions, particularly in scenarios where SSB periodicity adaptation is needed for both primary and secondary cells, while maintaining low latency and minimizing UE impacts.
The implementation of SSB periodicity adaptation mechanisms using MAC CE and DCI signaling to dynamically adjust SSB burst periodicity, allowing for cell discontinuous transmission (CDTX) patterns and on-demand SSB triggering, with support for single and dual SSB configurations to enhance network energy savings.
This approach reduces network energy consumption by optimizing SSB transmission patterns, minimizing latency, and ensuring seamless UE operations across various wireless communication standards, including LTE and 5G NR.
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Figure CN2024121764_02042026_PF_FP_ABST
Abstract
Description
CELL DISCONTINUOUS TRANSMISSION WITH SYNCHRONIZATION SIGNAL BLOCK ADAPTATIONTECHNICAL FIELD
[0001] This application relates generally to wireless communication systems, including the implementation of SSB periodicity adaptation.BACKGROUND
[0002] Wireless mobile communication technology uses various standards and protocols to transmit data between a base station and a wireless communication device. Wireless communication system standards and protocols can include, for example, 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G) , 3GPP New Radio (NR) (e.g., 5G) , and Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard for Wireless Local Area Networks (WLAN) (commonly known to industry groups as ) .
[0003] As contemplated by the 3GPP, different wireless communication systems'standards and protocols can use various radio access networks (RANs) for communicating between a base station of the RAN (which may also sometimes be referred to generally as a RAN node, a network node, or simply a node) and a wireless communication device known as a user equipment (UE) . 3GPP RANs can include, for example, Global System for Mobile communications (GSM) , Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN) , Universal Terrestrial Radio Access Network (UTRAN) , Evolved Universal Terrestrial Radio Access Network (E-UTRAN) , and / or Next-Generation Radio Access Network (NG-RAN) .
[0004] Each RAN may use one or more radio access technologies (RATs) to perform communication between the base station and the UE. For example, the GERAN implements GSM and / or EDGE RAT, the UTRAN implements Universal Mobile Telecommunication System (UMTS) RAT or other 3GPP RAT, the E-UTRAN implements LTE RAT (sometimes simply referred to as LTE) , and NG-RAN implements NR RAT (sometimes referred to herein as 5G RAT, 5G NR RAT, or simply NR) . In certain deployments, the E-UTRAN may also implement NR RAT. In certain deployments, NG-RAN may also implement LTE RAT.
[0005] A base station used by a RAN may correspond to that RAN. One example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly denoted as evolved Node B, enhanced Node B, eNodeB, or eNB) . One example of an NG-RAN base station is a next generation Node B (also sometimes referred to as a g Node B or gNB) .
[0006] A RAN provides its communication services with external entities through its connection to a core network (CN) . For example, E-UTRAN may utilize an Evolved Packet Core (EPC) while NG-RAN may utilize a 5G Core Network (5GC) .
[0007] Frequency bands for 5G NR may be separated into two or more different frequency ranges. For example, Frequency Range 1 (FR1) may include frequency bands operating in sub-6 gigahertz (GHz) frequencies, some of which are bands that may be used by previous standards, and may potentially be extended to cover new spectrum offerings from 410 megahertz (MHz) to 7125 MHz. Frequency Range 2 (FR2) may include frequency bands from 24.25 GHz to 52.6 GHz. Note that in some systems, FR2 may also include frequency bands from 52.6 GHz to 71 GHz (or beyond) . Bands in the millimeter wave (mmWave) range of FR2 may have smaller coverage but potentially higher available bandwidth than bands in FR1. Skilled persons will recognize these frequency ranges, which are provided by way of example, may change from time to time or from region to region.
[0008] BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0009] To easily identify the discussion of any particular element or act, the most significant digit or digits in a reference number refer to the figure number in which that element is first introduced.
[0010] FIG. 1 illustrates an example of SSB periodicity adaptation, according to embodiments herein.
[0011] FIG. 2 illustrates another example of SSB periodicity adaptation, according to embodiments herein.
[0012] FIG. 3 illustrates yet another example of SSB periodicity adaptation, according to embodiments herein.
[0013] FIG. 4 illustrates an example of SSB adaptation during cell DTX periods, according to embodiments herein.
[0014] FIG. 5 illustrates a second example of SSB adaptation during cell DTX periods, according to embodiments herein.
[0015] FIG. 6 illustrates an example MAC CE signaling format for SSB periodicity adaptation, according to embodiments herein.
[0016] FIG. 7 illustrates an example DCI with an adaptation SSB (ASSB) field, according to embodiments herein.
[0017] FIG. 8 illustrates a method for a UE, according to embodiments herein.
[0018] FIG. 9 illustrates a method for a base station, according to embodiments herein.
[0019] FIG. 10 illustrates an example architecture of a wireless communication system, according to embodiments disclosed herein.
[0020] FIG. 11 illustrates a system for performing signaling between a wireless device and a network device, according to embodiments disclosed herein.DETAILED DESCRIPTION
[0021] Various embodiments are described with regard to a UE. However, reference to a UE is merely provided for illustrative purposes. The example embodiments may be utilized with any electronic component that may establish a connection to a network and is configured with the hardware, software, and / or firmware to exchange information and data with the network. Therefore, the UE as described herein is used to represent any appropriate electronic component.
[0022] In some wireless communication systems, it was agreed to enhance network energy savings. For example, it was decided that it would be beneficial to enhance on-demand synchronization signal block (SSB) secondary cell (SCell) operation for CONNECTED mode UEs. Possible enhancements include specifying procedures and signaling method (s) to support on-demand SSB SCell operation for UEs in connected mode configured with carrier aggregation (CA) , for both intra-band and / or inter-band CA and specifying triggering method (s) (e.g., select from UE uplink wake-up-signal using an existing signal / channel, cell on / off indication via backhaul, and / or SCell activation / deactivation signaling) . Note that on-demand SSB transmissions may be used by the UE for at least SCell time / frequency synchronization, Layer 1 (L1) / Layer 3 (L3) measurements and SCell activation, and is supported for FR1 and FR2 in a non-shared spectrum.
[0023] Additionally, an adaptation of common signal / channel transmissions may be specified including the adaptation of SSB (s) in the time domain (e.g., adapting periodicity) and the adaptation of the physical random access channel (PRACH) in the time domain. Further, the adaptation of the PRACH in the spatial domain (e.g., non-uniform PRACH resources per SSB) may be studied and may be specified. Further, adaptation of paging occasions including confining the paging occasions in the time domain may be studied. Note that in certain systems there is to be no paging latency increase and no impacts to UEs by these changes.
[0024] In some wireless communication systems, for adaptation mechanism (s) of SSB in the time-domain for a network energy saving (NES) -capable UE’s primary cell (PCell) (Connected mode) , adaptation of cell defining (CD) -SSB on a sync raster is not supported, the adaptation for an SSB that is not CD-SSB is supported ( "A2" ) , and the adaptation for an SSB not on a sync raster is supported ( "A3" ) . For an NES-capable UE’s SCell, the adaptation of an SSB configured for the SCell may be supported for cases including the adaptation for an SSB that is not a CD-SSB on a sync raster ( "B2’ " ) and adaptation for an SSB that is not a CD-SSB not on a sync raster ( "B3’ " ) . However, the adaptation for CD-SSB ( "B1" ) including UE impacts compared to current mechanisms where the SSB is configured with periodicity greater than 20 milliseconds (ms) for SCell may be further studied.
[0025] Additionally, for the adaptation of SSB in the time-domain, “Option 1” is supported where “Option 1” corresponds to the adaptation of an SSB burst periodicity using one or more SSB burst periodicity value (s) . Note that using “Option 2” to realize “Option 1” is not precluded where “Option 2” corresponds to adaptation based on two SSB configurations (where up to two configurations can be active) . Details of the differences between the two SSB configurations (e.g., two different periodicities) , details including applicable scenarios, and the support of cell discontinuous transmission (DTX) for connected mode UEs for SSB may be further studied.
[0026] It was agreed that various implementations may be selected from for the extension of cell DTX to SSBs not on a sync-raster for connected mode UEs. In a first implementation, one SSB burst periodicity is configured for the UE and the UE may assume SSB transmissions are not present during a cell DTX non-active period. In a second implementation, the UE assumes SSB transmissions with different periodicities during a cell DTX non-active period and during a cell DTX active period. In a third implementation, cell DTX does not impact the UE's assumption on SSB transmissions (according to current mechanisms) .
[0027] In some wireless communication systems, it was agreed that for identified scenarios and cases, an on-demand SSB may be triggered by the gNB. For example, an on-demand SSB may be triggered by the base station for “Scenario #2” and “Case #1” , for “Scenario #2” and “Case #2” , for “Scenario #2A” and “Case #1” , and for “Scenario #2A” and “Case #2. ” It should be understood that “Scenario #2” corresponds to when an SCell is configured to a UE but before the UE receives SCell activation command (e.g., as defined in 3GPP technical specification (TS) 38.321) . “Scenario #2A” corresponds to when the UE receives an SCell activation command (e.g., as defined in 3GPP TS 38.321) . “Case #1" corresponds to there being no always-on SSB on the cell. “Case #2” corresponds to an always-on SSB periodically being transmitted on the cell.
[0028] Additionally, it was agreed, for a cell supporting on-demand SSB SCell operation, radio resource control (RRC) based signaling may be supported to indicate on-demand SSB transmission on the cell at least for the case where the RRC also configures the SCell, activates the SCell, and provides on-demand SSB configuration. However, whether to support RRC based signaling for other cases may be further studied. Further, medium access control control element (MAC CE) based signaling may be supported to indicate on-demand SSB transmission on the cell for “Scenario #2” and “Scenario #2A. ”
[0029] In some wireless communication systems, it was agreed that for SSB burst (s) indicated by on-demand SSB SCell operation via a MAC CE, the UE expects that on-demand SSB bursts are transmitted from time instance A that is determined according to various alternatives. In one alternative, time instance A is the beginning of the first slot (candidate SSB index 0 or the first actually transmitted SSB index) of the on-demand SSB burst that is at least T slots after the slot where the UE receives a signaling from the gNB to indicate on-demand SSB transmission. The SSB time domain positions of on-demand SSB burst are configured by the gNB. Note that the value of T is not less than existing timeline required for UE's MAC CE processing for SCell activation. However it may be further considered whether T is not less than where slot n+m is a slot indicated for PUCCH transmission with hybrid automatic repeat request-acknowledgment (HARQ-ACK) information when the UE receives MAC CE signaling to indicate on-demand SSB transmission ending in slot n, and It may be further specified that T_min can be equal to and if T = T_min. This consideration may apply at least for the case where an SCell with an on demand SSB transmission and cell with signaling transmission have the same numerology.
[0030] An example SSB pattern configuration information element (IE) in system information block type 1 (SIB1) is provided as follows:
[0031] Note that both the SSB periodicity and transmitted SSBs can be adapted for NES purpose (s) . Also note that longer SSB periodicities and / or reduced number of transmitted SSBs in one SSB burst set may reduce network energy used.
[0032] In some wireless communication systems, SSB adaptation for CONNECTED mode NES capable UEs is supported. However, adaptation mechanisms such as the adaptation of SSB burst periodicity, the adaptation based on two SSB configurations where up to two configurations can be active and cell DTX for SSB adaptation are to be further studied and discussed.
[0033] Embodiments herein introduce details on the SSB periodicity adaptation indication, including details on how the UE assumes the start of the SSB periodicity change.
[0034] FIG. 1 illustrates an example of SSB periodicity adaptation, according to embodiments herein.
[0035] In some embodiments, a MAC CE and / or downlink control information (DCI) may be used to indicate the SSB periodicity adaptation. In certain such embodiments, the SSB periodicity adaptation may be based on a single SSB configuration. The applicable value of the SSB periodicity is indicated in the MAC CE or the DCI. The UE assumes the SSB is transmitted with the new periodicity beginning at time instance A (i.e., a time instance) .
[0036] In some cases, time instance A is at the beginning of the first slot including candidate SSB #0 or the first transmitted SSB index of the SSB burst which is at least T slots after the slot where the UE receives the indication signaling ( "Option 1-0" ) . In some examples, this may be the same as for on-demand SSBs. Note that the T slots may be used a buffer to allow the UE to process the indication signaling and the T slots may either be preconfigured or based on UE capability. In some instances, the resulting gap between SSBs transmitted before and after the indication signaling may not be a period value (e.g., 5ms, 10ms, 20ms, 40ms, 80ms, 160ms) that is similar (or the same) as that of some current wireless communication systems (i.e., not a legacy period value) .
[0037] As illustrated in a first example 102, SSB periodicity adaptation may be performed to adapt the SSB periodicity from 20 ms 108 to 80 ms 114. The adapted SSB periodicity (i.e., periodicity of 80 ms 114) begins T slots 112 after the indication signaling 110. Then, the SSB burst is monitored / transmitted based on the adapted SSB periodicity (i.e., 80 ms 114) .
[0038] As illustrated in a second example 104, SSB periodicity adaptation may be performed to adapt the SSB periodicity from 80 ms 114 to 20 ms 108. The adapted SSB periodicity (i.e., periodicity of 20 ms) begins T slots 112 after the indication signaling 110. Then, the SSB burst is monitored / transmitted based on the adapted SSB periodicity (i.e., 20 ms 108) .
[0039] As illustrated in a third example 106, SSB periodicity adaptation may be performed in the middle of an SSB periodicity to adapt the SSB periodicity. In such examples, the adapted SSB periodicity (i.e., 20 ms 108) may be used for monitoring or transmission even if the previous SSB periodicity (i.e., 80 ms 114) has not yet been completed (i.e., a new SSB burst monitoring / transmission is started with the adapted periodicity during the previous SSB burst periodicity) .
[0040] By way of example, the brackets 116 shown in FIG. 1, FIG. 2, and FIG. 3 represent a fixed SSB periodicity (e.g., legacy periodicity) that is not based on SSB periodicity adaptation.
[0041] FIG. 2 illustrates another example of SSB periodicity adaptation, according to embodiments herein.
[0042] In some embodiments, time instance A is at the beginning of the slot including the next (i.e., subsequent) SSB with the old (unadapted) periodicity after the indication signaling ( "Option 1-1" ) . For example, as illustrated in a first example 202, SSB periodicity adaptation may be performed from a periodicity of 20 ms 208 to a periodicity of 80 ms 214. The adapted SSB periodicity may be used for monitoring / transmission T slots 212 after the indication signaling 210 where the time instance A 216 is the beginning of the slot including the next SSB with the old periodicity.
[0043] In certain such cases, time instance A is at the beginning of the slot including the next SSB with the old (unadapted) periodicity that is at least T slots / symbols after the indication signaling ( "Option 1-1'" ) . For example, as illustrated by a second example 204, SSB periodicity adaptation may be performed from a periodicity of 80 ms 214 to a periodicity of 20 ms 208. The adapted SSB periodicity may be used for monitoring / transmission T slots 212 after the indication signaling 210 where the time instance A 218 is at the beginning of the slot including the next SSB with the old periodicity that is at least T slots 212 after the indication signaling 210.
[0044] In some other such cases, as illustrated by a third example 206, “Option 1-1” and “Option 1-1'” may be combined to determine time instance A 220 as certain UEs may assume that the time instance A 220 is the beginning of the slot including the next SSB with the old periodicity after the indication signaling ( "Option 1-1" ) , while other certain UEs may assume that time instance A is the beginning of the slot including the next SSB with the old periodicity that is at least T slots / symbols after the indication signaling ( "Option 1-1'" ) , as the indication signaling 210 may be received by the UEs at different times. The combination of “Option 1-1” and “Option 1-1'” may enhance determining time instance A 220 as the T slots allow for time for the UE to perform processing of the indication signaling 210.
[0045] According to such cases, gaps between SSB burst sets may be similar (or the same) as periodicity values in some current wireless communication mechanisms. However, some such cases may introduce a larger latency when adapting from a larger periodicity to a smaller periodicity and different UEs'a ssumption on the adaptation pattern may be different due to a different reception time of the indication signaling.
[0046] FIG. 3 illustrates yet another example of SSB periodicity adaptation, according to embodiments herein.
[0047] In yet some other cases, time instance A is at the beginning of the slot including the last SSB before the indication signaling ( "Option 1-2" ) . The UE may not be required to monitor the SSB / perform measurement on the SSB that is within T slots after the slot where the UE receives a signaling from the base station to indicate an SSB periodicity change.
[0048] According to such cases, gaps between SSB burst sets may be similar (or the same) as periodicity values in some wireless communication mechanisms and such cases may improve latency performance (i.e., avoid latency issues) . However, such case may introduce a larger latency when adapting from a larger periodicity to a smaller periodicity and different UEs'a ssumption on the adaptation pattern may be different due to a different reception time of the indication signaling.
[0049] As illustrated in a first example 302, SSB periodicity adaptation may be performed from a periodicity of 20 ms 306 to a periodicity of 80 ms 312. The adapted SSB periodicity may be used T slots 310 after the indication signaling 308 where the time instance A 314 is at the beginning of the slot including the last SSB before the indication signaling 308.
[0050] As illustrated in a second example 304, SSB periodicity adaptation may be performed from a periodicity of 80 ms 312 to a periodicity of 20 ms 306. The adapted SSB periodicity may be used T slots 310 after the indication signaling 308 where the time instance A 316 is at the beginning of the slot including the last SSB before the indication signaling 308. According to “Option 1-2” the UE assumes that SSB bursts transmitted after the last received SSB will be transmitted with the adapted periodicity of 20 ms 306, even if the previous non-adapted SSB periodicity was 80 ms 312.
[0051] In yet some other cases, time instance A is indicated in MAC CE or DCI, which occurs at least T slots / symbols after the indication signaling ( "Option 1-3" ) . The indication details may include one or both of a half frame indication or an offset value. The half frame indication (N) may indicate the adapted SSB starts from n+N half frame and applies the new periodicity, where n is the current half frame when the UE receives the indication signaling. In some examples, the maximum size of N is 32 values (i.e., 160 / 5 bits) . As a result, 5 bits may be enough to transmit the half frame indication.
[0052] The offset value may take various values according to the periodicity value. For example, if the periodicity = 5ms the offset indication=0. If the periodicity = 10ms, the offset indication = 0 or 1, where ‘0’ indicates the SSB is in the first half frame of a system frame number (SFN) and ‘1’ indicates the second half frame of an SFN. If the periodicity = 20ms, the offset indication = 0, 1, 2, 3 where ‘0’ indicates the SSB is in the first half frame of every 2 SFNs starting from SFN #0, ‘1’ indicates the SSB is in the second half frame of every 2 SFNs starting from SFN #0, ‘2’ indicates the SSB is in the third half frame of every 2 SFNs starting from SFN #0, and ‘3’ indicates the SSB is in the fourth half frame of every 2 SFNs starting from SFN #0. Note that such cases may be understood as a second SSB configuration and may be combined with other cases and embodiments discussed herein. In some instances, if a half frame indication is indicated to the UE, an offset value may not need to be indicated to the UE.
[0053] In some embodiments, the periodicity adaptation may be based on two SSB configurations ( "Option 2" ) . The SSB configuration at least includes one or both of the half frame indication and the periodicity. For example, a periodicityAndOffset IE may be as follows:
[0054] At least one more SSB configuration may be configured besides the SSB configuration in a system information block (SIB) .
[0055] In some cases, only one SSB configuration is active and the indication signaling transmitted to the UE may indicate which SSB configuration is active ( "Option 2-1" ) . In some other cases, at most two SSB configurations may be active ( "Option 2-2" ) . The indication signaling indicates the activation / deactivation of the additional SSB configuration besides the one in SIB. The two SSB configurations may result in an SSB periodicity similar to that in current mechanisms. The UE may assume the indication signaling is effective after a sufficient time gap. Additionally, the quasi co location (QCL) of the SSBs in the two configurations may be that the same SSB index has the same QCL.
[0056] In some wireless communication systems, a periodicity adaptation based cell DTX pattern for SSB adaptation may be supported. In some examples, one SSB burst periodicity is configured for the UE and the UE may assume SSB transmissions are not present during a cell DTX non-active period ( "Option 3-1" ) . In some other examples, the UE assumes SSB transmission (s) with different periodicities during a cell DTX non-active period and during a cell DTX active period ( "Option 3-2" ) .
[0057] FIG. 4 illustrates an example of SSB adaptation during cell DTX periods, according to embodiments herein.
[0058] In some embodiments, when one SSB burst periodicity is configured for the UE and the UE assumes SSB transmissions are not present during a cell DTX non-active period ( "Option 3-1" ) , the maximum SSB periodicity is 160 ms. Additionally, on cell DTX configuration, the cell DTX cycle may be no larger than 160 ms. As a result of the maximum SSB periodicity being 160 ms, during an active cell DTX pattern 402, an SSB 404 will be transmitted and accordingly measured by the UE during the connected mode-discontinuous reception (DRX) (C-DRX) (i.e., the UE-CDRX 406) . Such embodiments overcome current problems where a UE-CDRX 406 exists but there is no active cell DTX pattern 402 and thus the UE cannot measure the UE-CDRX 406
[0059] FIG. 5 illustrates a second example of SSB adaptation during cell DTX periods, according to embodiments herein.
[0060] In some embodiments, when the UE assumes SSB transmission with different periodicities during a cell DTX non-active period and during an active cell DTX period ( "Option 3-2" ) , the UE assumes SSBs are transmitted with periodicity T1 504 during the active cell DTX pattern 502, and with SSB periodicity T2 506 outside of the active cell DTX pattern 502. The last SSB in the active cell DTX pattern 502 may be understood as the reference slot of T2 506. In some cases, the SSB periodicity is scaled N times or indicated a new value outside of the active period of cell DTX. The slot including the last SSB burst set in an active period is the reference slot for periodicity T2 506.
[0061] In some other cases, two SSB configurations are provided (i.e., one additional SSB configuration is provided together with the cell DTX configuration) . A group common DCI may activate the cell DTX pattern for SSB adaptation. Further, the additional SSB configuration can be indicated in the DCI if there are more than one additional SSB configuration configured. For example, certain SSBs may be configured (i.e., activated / deactivated) according to a first SSB configuration 508, while other SSBs may be configured (i.e., activated / deactivated) according to a second SSB configuration 510.
[0062] In some embodiments, for the application of SSB periodicity adaptation, the SSB adaptation may be applied to the PCell or always-on SSBs on the SCell. A MAC CE or a group common DCI may indicate the adaptation.
[0063] In some other embodiments, for the application of the SSB periodicity adaptation, the SSB adaptation may be applied to on-demand SSBs (OD-SSBs) . By default, the adaptation is applied to current SSBs (i.e., not on-demand SSBs) . It may be configured that the adaptation is applied to the OD-SSBs (e.g., one bit is used for indicating always-on SSB or OD-SSB) . In some cases, a MAC CE for OD-SSB indication may be reused for the SSB adaptation. If the same MAC CE is used, it should also be indicated whether this MAC CE is used for OD-SSB indication or adaptation. In some other cases, the MAC CE is only used to indicate OD-SSB transmission and an additional DCI indicates the SSB periodicity adaptation.
[0064] FIG. 6 illustrates an example MAC CE signaling format 600 for SSB periodicity adaptation, according to embodiments herein. In some embodiments, a MAC CE signaling format 600 may be used for embodiments herein that discuss SSB periodicity adaptation based on one SSB configuration and SSB periodicity adaptation based on two SSB configurations.
[0065] For periodicity adaptation based on one SSB configuration, it may be assumed that up to two SSB periodicities values for one serving cell may be configured in RRC signaling. The MAC-CE may also be used for SSB periodicity adaptation based cell DTX pattern for SSB adaptation to dynamically change the SSB periodicity, in either an active duration or an inactive duration of cell DTX / DRX.
[0066] The MAC CE signaling format 600 may include a first octet (i.e., Oct 1 602) that is for SSB adaptation activation / deactivation and a second octet (i.e., Oct 2 604) that is for the indication of activated SSB periodicity (SSB periodicity adaptation based on one SSB configuration) or OD-SSB configuration (SSB periodicity adaptation based on one SSB configuration) . One logical channel identifier (LCID) or enhanced logical channel identifier (eLCID) is introduced in 3GPP TS 38.321.
[0067] The MAC CE signaling format 600 may include “Bi” fields (e.g., B7, B6, B5..., B1) . The “Bi” fields correspond to if there is an SCell configured for the MAC entity with SCellIndex i, as specified in 3GPP TS 38.331, this field indicates the activation / deactivation status of adaptation SSB in SCell with SCellIndex i, else the MAC entity ignores the Bi field. By way of example, the Bi field is set to 1 to indicate that adaptation SSB in the SCell with SCellIndex i is to be activated. The Bi field is set to 0 to indicate that the adaptation SSB in the SCell with SCellIndex i is to be deactivated.
[0068] The MAC CE signaling format 600 may include “Ci” fields (e.g., C7, C6, C5, ..., C1) . The “Ci” fields correspond to if an adaptation SSB is activated in SCell configured for the MAC entity with SCellIndex i as specified in 3GPP TS 38.331, this field indicates which candidate SSB periodicity (for SSB periodicity adaptation based on one SSB configuration) or which candidate SSB configuration (for SSB periodicity adaptation based on two SSB configuration) of the SCell with SCellIndex i is applied, else the MAC entity ignores the Ci field. By way of example, the Ci field is set to 0 to indicate that the first candidate SSB periodicity or the first candidate SSB configuration in SCell with SCellIndex i is to be applied. The Ci field is set to one to indicate that the second candidate SSB periodicity or second candidate SSB configuration in SCell with SCellIndex i is to be applied.
[0069] The MAC CE signaling format 600 may include “R” fields. The “R” fields, for OD-SSB, may be a reserved bit (or field) set to 0. For SSB adaptation, the “R” field in Oct1 may indicate the activation / deactivation status of adaptation SSB in PCell. The “R” field in Oct2 may indicate which candidate SSB periodicity (for SSB periodicity adaptation based on one SSB configuration) or which SSB configuration (for SSB periodicity adaptation based on two SSB configuration) in the PCell shall be applied.
[0070] FIG. 7 illustrates an example DCI 700 with an adaptation SSB (ASSB) field, according to embodiments herein. In some embodiments, a field may be introduced in DCI 700 (e.g., an ASSB field in DCI format 2-9) for embodiments herein that discuss SSB periodicity adaptation based on one SSB configuration and SSB periodicity adaptation based on two SSB configurations. It may also be used for embodiments that discuss periodicity adaptation based cell DTX pattern for SSB adaptation to dynamically change the SSB periodicity. Such fields may be used in either an active duration or an inactive duration of cell DTX / DRX. If the UE receives the DCI 700 (e.g., DCI format 2-9) with a two bit field (e.g. ASSB bits 702) for one serving cell, it may indicate whether and / or how the adaptation SSB is transmitted in the concerned serving cell.
[0071] If the first bit of the ASSB bits 702 is 1, it activates adaptation SSB transmission in the concerned serving cell belonging to the block. If the first bit of the ASSB bits 702 is 0, it deactivates adaptation SSB transmission in the concerned serving cell belonging to the block.
[0072] If the second bit of ASSB bits 702 is 0, it indicates to apply the first candidate SSB periodicity (for SSB periodicity adaptation based on one SSB configuration) or first candidate SSB configuration (for SSB periodicity adaptation based on two SSB configuration) in the concerned serving cell belonging to the block. If the second bit of ASSB bits 702 is 1, it indicates to apply the second candidate SSB periodicity (for SSB periodicity adaptation based on one SSB configuration) or second candidate SSB configuration (for SSB periodicity adaptation based on two SSB configuration) in the concerned serving cell belonging to the block. The adaptation SSB transmission may be triggered in the activated serving cell. It should be understood that other DCI formats may be considered and similar block structures may be considered.
[0073] FIG. 8 illustrates a method 800 for a UE, according to embodiments herein. The illustrated method 800 includes receiving 802, from a base station, one or more SSB configurations. The method 800 further includes receiving 804, from the base station, indication signaling including SSB periodicity adaptation information for the one or more SSB configurations. The method 800 further includes determining 806 a time instance based on the SSB periodicity adaptation information wherein an SSB burst periodicity of SSB bursts transmitted by the base station changes from a first periodicity to a second periodicity at the time instance. The method 800 further includes, starting at the time instance, monitoring 808 the SSB bursts using the second periodicity.
[0074] In some embodiments of the method 800, receiving the one or more SSB configurations comprises receiving a single SSB configuration and wherein the indication signaling comprises a value of the second periodicity. In some such embodiments, the time instance is at a beginning of a first slot including a candidate SSB after receiving the indication signaling. In some other such embodiments, the time instance is a number of slots after a first SSB index of the SSB bursts after receiving the indication signaling. In some other such embodiments, the time instance is at a beginning of a slot including a next SSB with the first periodicity after receiving the indication signaling. In some other such embodiments, the time instance is at beginning of a slot including a next SSB with the first periodicity that is at least a number of slots after receiving the indication signaling. In some other such embodiments, the time instance is at a beginning of a slot comprising a last SSB before receiving the indication signaling. In some other such embodiments, the indication signaling explicitly indicates the time instance at least a number of slots or symbols after receiving the indication signaling. Certain such embodiments further comprise receiving the time instance in one of a MAC CE message and a DCI message based on a half frame indication or an offset value.
[0075] In some embodiments of the method 800, receiving the one or more SSB configurations comprises receiving two SSB configurations. In some such embodiments, the indication signaling indicates that a first SSB configuration of the two SSB configurations is activated. In some other such embodiments, the indication signaling indicates an activation of a first SSB configuration of the two SSB configurations that is not in an SIB.
[0076] In some embodiments of the method 800, the SSB periodicity adaptation information is based on a cell DTX pattern for an SSB adaptation. Some such embodiments further comprise determining that SSB transmissions are not present during an inactive period of a cell DTX cycle. In certain such embodiments, the cell DTX cycle is less than or equal to 160 milliseconds. Some other such embodiments further comprise receiving an indication of a scaling of the SSB burst periodicity. In some other such embodiments, receiving the one or more SSB configurations comprises receiving two SSB configurations.
[0077] In some embodiments of the method 800, the UE comprises an NES UE.
[0078] In some embodiments of the method 800, the SSB adaptation information comprises application information for a PCell or for a plurality of always-on SSBs on an SCell.
[0079] In some embodiments of the method 800, the SSB adaptation information comprises application information for a plurality of on-demand SSBs.
[0080] FIG. 9 illustrates a method 900 for a base station, according to embodiments herein. The illustrated method 900 includes generating 902 one or more SSB configurations. The method 900 further includes transmitting 904, to a UE, the one or more SSB configurations. The method 900 further includes transmitting 906, to the UE, indication signaling comprising SSB periodicity adaptation information including a time instance at which an SSB burst periodicity changes from a first period to a second period. The method 900 further includes transmitting 908, to the UE, first SSB bursts using the first period before the time instance and second SSB bursts using the second period at or after the time instance.
[0081] In some embodiments of the method 900, generating the one or more SSB configurations comprises generating a single SSB configuration and wherein the indication signaling comprises a value of the second period. In some such embodiments, the time instance is at a beginning of a first slot including a candidate SSB after transmitting the indication signaling. In some other such embodiments, the time instance is a number of slots after a first transmitted SSB index of the first SSB bursts after transmitting the indication signaling. In some other such embodiments, the time instance is at a beginning of a slot including a next SSB with the first period after transmitting the indication signaling. In some other such embodiments, the time instance is at beginning of a slot including a next SSB with the first period that is at least a number of slots after transmitting the indication signaling. In some other such embodiments, the time instance is at a beginning of a slot comprising a last SSB before transmitting the indication signaling. In some other such embodiments, the indication signaling explicitly indicates the time instance at least a number of slots or symbols after transmitting the indication signaling. Certain such embodiments further comprise indicating the time instance in one of a MAC CE message and a DCI message based on a half frame indication or an offset value.
[0082] In some embodiments of the method 900, generating the one or more SSB configurations comprises generating two SSB configurations. Some such embodiments further comprise activating a first SSB configuration of the two SSB configurations and wherein the indication signaling comprises the first SSB configuration of the two SSB configurations. In some other such embodiments, the indication signaling indicates an activation of a first SSB configuration of the two SSB configurations that is not in an SIB.
[0083] In some embodiments of the method 900, the SSB periodicity adaptation information is based on a cell DTX pattern for an SSB adaptation. Some such embodiments further comprise configuring one SSB burst periodicity and wherein SSB transmissions are not present during an inactive period of a cell DTX cycle. In certain such embodiments, the cell DTX cycle is less than or equal to 160 milliseconds. Some other such embodiments further comprise scaling the second period. Some other such embodiments further comprise transmitting two SSB configurations to the UE.
[0084] In some embodiments of the method 900, the UE comprises an NES UE.
[0085] In some embodiments of the method 900, the SSB adaptation information comprises application information for a PCell or for a plurality of always-on SSBs on an SCell.
[0086] In some embodiments of the method 900, the SSB adaptation information comprises application information for a plurality of on-demand SSBs.
[0087] FIG. 10 illustrates an example architecture of a wireless communication system 1000, according to embodiments disclosed herein. The following description is provided for an example wireless communication system 1000 that operates in conjunction with the LTE system standards and / or 5G or NR system standards as provided by 3GPP technical specifications.
[0088] As shown by FIG. 10, the wireless communication system 1000 includes UE 1002 and UE 1004 (although any number of UEs may be used) . In this example, the UE 1002 and the UE 1004 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks) , but may also comprise any mobile or non-mobile computing device configured for wireless communication.
[0089] The UE 1002 and UE 1004 may be configured to communicatively couple with a RAN 1006. In embodiments, the RAN 1006 may be NG-RAN, E-UTRAN, etc. The UE 1002 and UE 1004 utilize connections (or channels) (shown as connection 1008 and connection 1010, respectively) with the RAN 1006, each of which comprises a physical communications interface. The RAN 1006 can include one or more base stations (such as base station 1012 and base station 1014) that enable the connection 1008 and connection 1010.
[0090] In this example, the connection 1008 and connection 1010 are air interfaces to enable such communicative coupling, and may be consistent with RAT (s) used by the RAN 1006, such as, for example, an LTE and / or NR.
[0091] In some embodiments, the UE 1002 and UE 1004 may also directly exchange communication data via a sidelink interface 1016. The UE 1004 is shown to be configured to access an access point (shown as AP 1018) via connection 1020. By way of example, the connection 1020 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.11 protocol, wherein the AP 1018 may comprise a router. In this example, the AP 1018 may be connected to another network (for example, the Internet) without going through a CN 1024.
[0092] In embodiments, the UE 1002 and UE 1004 can be configured to communicate using orthogonal frequency division multiplexing (OFDM) communication signals with each other or with the base station 1012 and / or the base station 1014 over a multicarrier communication channel in accordance with various communication techniques, such as, but not limited to, an orthogonal frequency division multiple access (OFDMA) communication technique (e.g., for downlink communications) or a single carrier frequency division multiple access (SC-FDMA) communication technique (e.g., for uplink and ProSe or sidelink communications) , although the scope of the embodiments is not limited in this respect. The OFDM signals can comprise a plurality of orthogonal subcarriers.
[0093] In some embodiments, all or parts of the base station 1012 or base station 1014 may be implemented as one or more software entities running on server computers as part of a virtual network. In addition, or in other embodiments, the base station 1012 or base station 1014 may be configured to communicate with one another via interface 1022. In embodiments where the wireless communication system 1000 is an LTE system (e.g., when the CN 1024 is an EPC) , the interface 1022 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs and the like) that connect to an EPC, and / or between two eNBs connecting to the EPC. In embodiments where the wireless communication system 1000 is an NR system (e.g., when CN 1024 is a 5GC) , the interface 1022 may be an Xn interface. The Xn interface is defined between two or more base stations (e.g., two or more gNBs and the like) that connect to 5GC, between a base station 1012 (e.g., a gNB) connecting to 5GC and an eNB, and / or between two eNBs connecting to 5GC (e.g., CN 1024) .
[0094] The RAN 1006 is shown to be communicatively coupled to the CN 1024. The CN 1024 may comprise one or more network elements 1026, which are configured to offer various data and telecommunications services to customers / subscribers (e.g., users of UE 1002 and UE 1004) who are connected to the CN 1024 via the RAN 1006. The components of the CN 1024 may be implemented in one physical device or separate physical devices including components to read and execute instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) .
[0095] In embodiments, the CN 1024 may be an EPC, and the RAN 1006 may be connected with the CN 1024 via an S1 interface 1028. In embodiments, the S1 interface 1028 may be split into two parts, an S1 user plane (S1-U) interface, which carries traffic data between the base station 1012 or base station 1014 and a serving gateway (S-GW) , and the S1-MME interface, which is a signaling interface between the base station 1012 or base station 1014 and mobility management entities (MMEs) .
[0096] In embodiments, the CN 1024 may be a 5GC, and the RAN 1006 may be connected with the CN 1024 via an NG interface 1028. In embodiments, the NG interface 1028 may be split into two parts, an NG user plane (NG-U) interface, which carries traffic data between the base station 1012 or base station 1014 and a user plane function (UPF) , and the S1 control plane (NG-C) interface, which is a signaling interface between the base station 1012 or base station 1014 and access and mobility management functions (AMFs) .
[0097] Generally, an application server 1030 may be an element offering applications that use internet protocol (IP) bearer resources with the CN 1024 (e.g., packet switched data services) . The application server 1030 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc. ) for the UE 1002 and UE 1004 via the CN 1024. The application server 1030 may communicate with the CN 1024 through an IP communications interface 1032.
[0098] FIG. 11 illustrates a system 1100 for performing signaling 1134 between a wireless device 1102 and a network device 1118, according to embodiments disclosed herein. The system 1100 may be a portion of a wireless communications system as herein described. The wireless device 1102 may be, for example, a UE of a wireless communication system. The network device 1118 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.
[0099] The wireless device 1102 may include one or more processor (s) 1104. The processor (s) 1104 may execute instructions such that various operations of the wireless device 1102 are performed, as described herein. The processor (s) 1104 may include one or more baseband processors implemented using, for example, a central processing unit (CPU) , a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
[0100] The wireless device 1102 may include a memory 1106. The memory 1106 may be a non-transitory computer-readable storage medium that stores instructions 1108 (which may include, for example, the instructions being executed by the processor (s) 1104) . The instructions 1108 may also be referred to as program code or a computer program. The memory 1106 may also store data used by, and results computed by, the processor (s) 1104.
[0101] The wireless device 1102 may include one or more transceiver (s) 1110 that may include radio frequency (RF) transmitter circuitry and / or receiver circuitry that use the antenna (s) 1112 of the wireless device 1102 to facilitate signaling (e.g., the signaling 1134) to and / or from the wireless device 1102 with other devices (e.g., the network device 1118) according to corresponding RATs.
[0102] The wireless device 1102 may include one or more antenna (s) 1112 (e.g., one, two, four, or more) . For embodiments with multiple antenna (s) 1112, the wireless device 1102 may leverage the spatial diversity of such multiple antenna (s) 1112 to send and / or receive multiple different data streams on the same time and frequency resources. This behavior may be referred to as, for example, multiple input multiple output (MIMO) behavior (referring to the multiple antennas used at each of a transmitting device and a receiving device that enable this aspect) . MIMO transmissions by the wireless device 1102 may be accomplished according to precoding (or digital beamforming) that is applied at the wireless device 1102 that multiplexes the data streams across the antenna (s) 1112 according to known or assumed channel characteristics such that each data stream is received with an appropriate signal strength relative to other streams and at a desired location in the spatial domain (e.g., the location of a receiver associated with that data stream) . Certain embodiments may use single user MIMO (SU-MIMO) methods (where the data streams are all directed to a single receiver) and / or multi user MIMO (MU-MIMO) methods (where individual data streams may be directed to individual (different) receivers in different locations in the spatial domain) .
[0103] In certain embodiments having multiple antennas, the wireless device 1102 may implement analog beamforming techniques, whereby phases of the signals sent by the antenna (s) 1112 are relatively adjusted such that the (joint) transmission of the antenna (s) 1112 can be directed (this is sometimes referred to as beam steering) .
[0104] The wireless device 1102 may include one or more interface (s) 1114. The interface (s) 1114 may be used to provide input to or output from the wireless device 1102. For example, a wireless device 1102 that is a UE may include interface (s) 1114 such as microphones, speakers, a touchscreen, buttons, and the like in order to allow for input and / or output to the UE by a user of the UE. Other interfaces of such a UE may be made up of transmitters, receivers, and other circuitry (e.g., other than the transceiver (s) 1110 / antenna (s) 1112 already described) that allow for communication between the UE and other devices and may operate according to known protocols (e.g., and the like) .
[0105] The wireless device 1102 may include an SSB periodicity adaptation module 1116. The SSB periodicity adaptation module 1116 may be implemented via hardware, software, or combinations thereof. For example, the SSB periodicity adaptation module 1116 may be implemented as a processor, circuit, and / or instructions 1108 stored in the memory 1106 and executed by the processor (s) 1104. In some examples, the SSB periodicity adaptation module 1116 may be integrated within the processor (s) 1104 and / or the transceiver (s) 1110. For example, the SSB periodicity adaptation module 1116 may be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the processor (s) 1104 or the transceiver (s) 1110.
[0106] The SSB periodicity adaptation module 1116 may be used for various aspects of the present disclosure, for example, aspects of FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 8. The SSB periodicity adaptation module 1116 may be configured to receive, from a network device 1118, one or more SSB configurations, wherein the one or more SSB configurations comprise SSB periodicity adaptation information. The SSB periodicity adaptation module 1116 may be further configured to determine a time instance based on the SSB periodicity adaptation information, wherein an SSB burst periodicity of SSB bursts transmitted by the base station changes from a first periodicity to a second periodicity at the time instance. The SSB periodicity adaptation module 1116 may be further configured to, starting at the time instance, monitoring the SSB bursts using the second periodicity.
[0107] The network device 1118 may include one or more processor (s) 1120. The processor (s) 1120 may execute instructions such that various operations of the network device 1118 are performed, as described herein. The processor (s) 1120 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
[0108] The network device 1118 may include a memory 1122. The memory 1122 may be a non-transitory computer-readable storage medium that stores instructions 1124 (which may include, for example, the instructions being executed by the processor (s) 1120) . The instructions 1124 may also be referred to as program code or a computer program. The memory 1122 may also store data used by, and results computed by, the processor (s) 1120.
[0109] The network device 1118 may include one or more transceiver (s) 1126 that may include RF transmitter circuitry and / or receiver circuitry that use the antenna (s) 1128 of the network device 1118 to facilitate signaling (e.g., the signaling 1134) to and / or from the network device 1118 with other devices (e.g., the wireless device 1102) according to corresponding RATs.
[0110] The network device 1118 may include one or more antenna (s) 1128 (e.g., one, two, four, or more) . In embodiments having multiple antenna (s) 1128, the network device 1118 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc., as has been described.
[0111] The network device 1118 may include one or more interface (s) 1130. The interface (s) 1130 may be used to provide input to or output from the network device 1118. For example, a network device 1118 that is a base station may include interface (s) 1130 made up of transmitters, receivers, and other circuitry (e.g., other than the transceiver (s) 1126 / antenna (s) 1128 already described) that enables the base station to communicate with other equipment in a core network, and / or that enables the base station to communicate with external networks, computers, databases, and the like for purposes of operations, administration, and maintenance of the base station or other equipment operably connected thereto.
[0112] The network device 1118 may include an SSB periodicity adaptation module 1132. The SSB periodicity adaptation module 1132 may be implemented via hardware, software, or combinations thereof. For example, the SSB periodicity adaptation module 1132 may be implemented as a processor, circuit, and / or instructions 1124 stored in the memory 1122 and executed by the processor (s) 1120. In some examples, the SSB periodicity adaptation module 1132 may be integrated within the processor (s) 1120 and / or the transceiver (s) 1126. For example, the SSB periodicity adaptation module 1132 may be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the processor (s) 1120 or the transceiver (s) 1126.
[0113] The SSB periodicity adaptation module 1132 may be used for various aspects of the present disclosure, for example, aspects of FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, and FIG. 9. The SSB periodicity adaptation module 1132 may be configured to generate one or more SSB configurations comprising SSB periodicity adaptation information including a time instance at which an SSB burst periodicity changes from a first period to a second period, The SSB periodicity adaptation module 1132 may be further configured to transmit, to a wireless device 1102, the one or more SSB configurations. The SSB periodicity adaptation module 1132 may be further configured to transmit, to the wireless device 1102, first SSB bursts using the first period before the time instance and second SSB bursts using the second period at or after the time instance.
[0114] Embodiments contemplated herein include an apparatus comprising means to perform one or more elements of the method 800. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 1102 that is a UE, as described herein) .
[0115] Embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of the method 800. This non-transitory computer-readable media may be, for example, a memory of a UE (such as a memory 1106 of a wireless device 1102 that is a UE, as described herein) .
[0116] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry to perform one or more elements of the method 800. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 1102 that is a UE, as described herein) .
[0117] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of the method 800. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 1102 that is a UE, as described herein) .
[0118] Embodiments contemplated herein include a signal as described in or related to one or more elements of the method 800.
[0119] Embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processor is to cause the processor to carry out one or more elements of the method 800. The processor may be a processor of a UE (such as a processor (s) 1104 of a wireless device 1102 that is a UE, as described herein) . These instructions may be, for example, located in the processor and / or on a memory of the UE (such as a memory 1106 of a wireless device 1102 that is a UE, as described herein) .
[0120] Embodiments contemplated herein include an apparatus comprising means to perform one or more elements of the method 900. This apparatus may be, for example, an apparatus of a base station (such as a network device 1118 that is a base station, as described herein) .
[0121] Embodiments contemplated herein include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of the method 900. This non-transitory computer-readable media may be, for example, a memory of a base station (such as a memory 1122 of a network device 1118 that is a base station, as described herein) .
[0122] Embodiments contemplated herein include an apparatus comprising logic, modules, or circuitry to perform one or more elements of the method 900. This apparatus may be, for example, an apparatus of a base station (such as a network device 1118 that is a base station, as described herein) .
[0123] Embodiments contemplated herein include an apparatus comprising: one or more processors and one or more computer-readable media comprising instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of the method 900. This apparatus may be, for example, an apparatus of a base station (such as a network device 1118 that is a base station, as described herein) .
[0124] Embodiments contemplated herein include a signal as described in or related to one or more elements of the method 900.
[0125] Embodiments contemplated herein include a computer program or computer program product comprising instructions, wherein execution of the program by a processing element is to cause the processing element to carry out one or more elements of the method 900. The processor may be a processor of a base station (such as a processor (s) 1120 of a network device 1118 that is a base station, as described herein) . These instructions may be, for example, located in the processor and / or on a memory of the base station (such as a memory 1122 of a network device 1118 that is a base station, as described herein) .
[0126] For one or more embodiments, at least one of the components set forth in one or more of the preceding figures may be configured to perform one or more operations, techniques, processes, and / or methods as set forth herein. For example, a baseband processor as described herein in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth herein. For another example, circuitry associated with a UE, base station, network element, etc. as described above in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth herein.
[0127] Any of the above described embodiments may be combined with any other embodiment (or combination of embodiments) , unless explicitly stated otherwise. The foregoing description of one or more implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of embodiments to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of various embodiments.
[0128] Embodiments and implementations of the systems and methods described herein may include various operations, which may be embodied in machine-executable instructions to be executed by a computer system. A computer system may include one or more general-purpose or special-purpose computers (or other electronic devices) . The computer system may include hardware components that include specific logic for performing the operations or may include a combination of hardware, software, and / or firmware.
[0129] It should be recognized that the systems described herein include descriptions of specific embodiments. These embodiments can be combined into single systems, partially combined into other systems, split into multiple systems or divided or combined in other ways. In addition, it is contemplated that parameters, attributes, aspects, etc. of one embodiment can be used in another embodiment. The parameters, attributes, aspects, etc. are merely described in one or more embodiments for clarity, and it is recognized that the parameters, attributes, aspects, etc. can be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless specifically disclaimed herein.
[0130] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
[0131] Although the foregoing has been described in some detail for purposes of clarity, it will be apparent that certain changes and modifications may be made without departing from the principles thereof. It should be noted that there are many alternative ways of implementing both the processes and apparatuses described herein. Accordingly, the present embodiments are to be considered illustrative and not restrictive, and the description is not to be limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.
Claims
1.A method for a user equipment (UE) comprising:receiving, from a base station, one or more synchronization signal block (SSB) configurations;receiving, from the base station, indication signaling including SSB periodicity adaptation information for the one or more SSB configurations;determining a time instance based on the SSB periodicity adaptation information, wherein an SSB burst periodicity of SSB bursts transmitted by the base station changes from a first periodicity to a second periodicity at the time instance; andstarting at the time instance, monitoring the SSB bursts using the second periodicity.2.The method of claim 1, wherein receiving the one or more SSB configurations comprises receiving a single SSB configuration, and wherein the indication signaling comprises a value of the second periodicity.3.The method of claim 2, wherein the time instance is at a beginning of a first slot including a candidate SSB after receiving the indication signaling.4.The method of claim 2, wherein the time instance is a number of slots after a first SSB index of the SSB bursts after receiving the indication signaling.5.The method of claim 2, wherein the time instance is at a beginning of a slot including a next SSB with the first periodicity after receiving the indication signaling.6.The method of claim 2, wherein the time instance is at beginning of a slot including a next SSB with the first periodicity that is at least a number of slots after receiving the indication signaling.7.The method of claim 2, wherein the time instance is at a beginning of a slot comprising a last SSB before receiving the indication signaling.8.The method of claim 2, wherein the indication signaling explicitly indicates the time instance at least a number of slots or symbols after receiving the indication signaling.9.The method of claim 8, further comprising receiving the time instance in one of a medium access control control element (MAC CE) message and a downlink control information (DCI) message based on a half frame indication or an offset value.10.The method of claim 1, wherein receiving the one or more SSB configurations comprises receiving two SSB configurations.11.The method of claim 10, wherein the indication signaling indicates that a first SSB configuration of the two SSB configurations is activated.12.The method of claim 10, wherein the indication signaling indicates an activation of a first SSB configuration of the two SSB configurations that is not in a system information block (SIB) .13.The method of claim 1, wherein the SSB periodicity adaptation information is based on a cell discontinuous transmission (DTX) pattern for an SSB adaptation.14.The method of claim 13, further comprising determining that SSB transmissions are not present during an inactive period of a cell discontinuous transmission (DTX) cycle.15.The method of claim 14, wherein the cell DTX cycle is less than or equal to 160 milliseconds.16.The method of claim 13, further comprising receiving an indication of a scaling of the SSB burst periodicity.17.The method of claim 13, wherein receiving the one or more SSB configurations comprises receiving two SSB configurations.18.The method of claim 1, wherein the UE comprises a network energy saving (NES) UE.19.The method of claim 1, wherein the SSB adaptation information comprises application information for a primary cell (PCell) or for a plurality of always-on SSBs on a secondary cell (SCell) .20.The method of claim 1, wherein the SSB adaptation information comprises application information for a plurality of on-demand SSBs.21.A method for a base station comprising:generating one or more synchronization signal block (SSB) configurations;transmitting, to a user equipment (UE) , the one or more SSB configurations;transmitting, to the UE, indication signaling comprising SSB periodicity adaptation information including a time instance at which an SSB burst periodicity changes from a first period to a second period; andtransmitting, to the UE, first SSB bursts using the first period before the time instance and second SSB bursts using the second period at or after the time instance.22.The method of claim 21, wherein generating the one or more SSB configurations comprises generating a single SSB configuration, and wherein the indication signaling comprises a value of the second period.23.The method of claim 22, wherein the time instance is at a beginning of a first slot including a candidate SSB after transmitting the indication signaling.24.The method of claim 22, wherein the time instance is a number of slots after a first transmitted SSB index of the first SSB bursts after transmitting the indication signaling.25.The method of claim 22, wherein the time instance is at a beginning of a slot including a next SSB with the first period after transmitting the indication signaling.26.The method of claim 22, wherein the time instance is at beginning of a slot including a next SSB with the first period that is at least a number of slots after transmitting the indication signaling.27.The method of claim 22, wherein the time instance is at a beginning of a slot comprising a last SSB before transmitting the indication signaling.28.The method of claim 22, wherein the indication signaling explicitly indicates the time instance at least a number of slots or symbols after transmitting the indication signaling.29.The method of claim 28, further comprising indicating the time instance in one of a medium access control control element (MAC CE) message and a downlink control information (DCI) message based on a half frame indication or an offset value.30.The method of claim 21, wherein generating the one or more SSB configurations comprises generating two SSB configurations.31.The method of claim 30, further comprising:activating a first SSB configuration of the two SSB configurations; andwherein the indication signaling comprises the first SSB configuration of the two SSB configurations.32.The method of claim 30, wherein the indication signaling indicates an activation of a first SSB configuration of the two SSB configurations that is not in a system information block (SIB) .33.The method of claim 21, wherein the SSB periodicity adaptation information is based on a cell discontinuous transmission (DTX) pattern for an SSB adaptation.34.The method of claim 33, further comprising configuring one SSB burst periodicity, and wherein SSB transmissions are not present during an inactive period of a cell discontinuous transmission (DTX) cycle.35.The method of claim 34, wherein the cell DTX cycle is less than or equal to 160 milliseconds.36.The method of claim 33, further comprising scaling the second period.37.The method of claim 33, further comprising transmitting two SSB configurations to the UE.38.The method of claim 21, wherein the UE comprises a network energy saving (NES) UE.39.The method of claim 21, wherein the SSB adaptation information comprises application information for a primary cell (PCell) or for a plurality of always-on SSBs on a secondary cell (SCell) .40.The method of claim 21, wherein the SSB adaptation information comprises application information for a plurality of on-demand SSBs.41.An apparatus comprising means to perform the method of any of claim 1 to claim 40.42.A computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform the method of any of claim 1 to claim 40.43.An apparatus comprising logic, modules, or circuitry to perform the method of any of claim 1 to claim 40.44.A baseband processor for a user equipment (UE) that is configured to cause the UE to perform one or more elements of any one of claim 1 to claim 20.45.A baseband processor for a base station that is configured to cause the base station to perform one or more elements of any one of claim 21 to claim 40.
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