Interruption due to RRM measurement on deactivated scell in network energy saving scenario
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2026-08-13
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Figure CN2025076199_13082026_PF_FP_ABST
Abstract
Description
INTERRUPTION DUE TO RRM MEASUREMENT ON DEACTIVATED SCELL IN NETWORK ENERGY SAVING SCENARIOTECHNICAL FIELD
[0001] This application relates generally to wireless communication systems, including a framework for On-Demand Synchronization Signal Block (OD-SSB) measurements.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.BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0008] 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.
[0009] FIG. 1 illustrates an example timeline of a UE turning on and off an RF chain for measurements on an SCell in accordance with some embodiments.
[0010] FIG. 2 illustrates an example timeline where a UE decides to skip or perform SCell measurements based on a PCell Discontinuous Reception (DRX) cycle in accordance with some embodiments.
[0011] FIG. 3 illustrates an SSB transmission timeline of a first case and an SSB transmission timeline of a second case where OD-SSB is used in accordance with some embodiments.
[0012] FIG. 4 illustrates an example UE measurement framework for OD-SSB in accordance with some embodiments.
[0013] FIG. 5 illustrates an OD-SSB timeline for a first scenario where the network activates target SCell within the fast measurement mode window in accordance with some embodiments.
[0014] FIG. 6 illustrates an OD-SSB timeline for a second scenario for activating the target SCell in accordance with some embodiments.
[0015] FIG. 7 illustrates an OD-SSB timeline for a third scenario for activating the target SCell in accordance with some embodiments.
[0016] FIG. 8 illustrates a method for a UE, according to embodiments herein.
[0017] FIG. 9 illustrates an example architecture of a wireless communication system, according to embodiments disclosed herein.
[0018] FIG. 10 illustrates a system for performing signaling between a wireless device and a network device, according to embodiments disclosed herein.DETAILED DESCRIPTION
[0019] 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.
[0020] One of the goals of wireless communication systems is to minimize power consumption, particularly for battery-powered devices like a UE. Power efficiency improvements can result in longer operation of the UE between charges. Reducing power consumption may ensure that these devices can maintain connectivity and functionality over extended periods without frequent recharging. Techniques like turning off the radio frequency (RF) chain when not in use, optimizing signal processing, and adapting transmission power, aim to conserve energy.
[0021] Turning off the RF chain in a UE, is a power management strategy that may be used when certain radio frequencies are not in use. The RF chain may include components responsible for transmitting and receiving radio frequency signals. When the RF chain is turned off, these components are disabled, thereby reducing power consumption. For exmaple, the RF chain may be turned off when a cell, such as a Secondary Cell (SCell) in a mobile communication network, is not actively engaged in data transmission or reception. The deactivation of the RF chain may help extend the battery life of the device.
[0022] Accordingly, for power saving, a UE is allowed to turn off the RF chain (or reduce RF channel bandwidth) for SCell when the SCell is deactivated, since there is no data transmission or reception on the SCell. Although there is no data transmission or reception on the SCell, the network may still configure Radio Resource Management (RRM) measurement on the carrier, for mobility purposes (e.g., SCell management or handover) . When RRM measurement occasions come, the UE needs to turn on the RF chain to measure the reference signals such as Synchronization Signal Block (SSB) and channel state information-reference signal (CSI-RS) (configured for L3 measurement) . After the measurement occasions, the UE can still turn off the RF chain for power saving. However, the switching on or off of the RF chain may cause interruption to other serving cells, since multiple RF chains may be integrated on the same RF integrated circuit (RFIC) .
[0023] FIG. 1 illustrates an example timeline 104 of a UE turning on and off an RF chain for measurements on an SCell in accordance with some embodiments. As shown, the UE may establish a connection with a primary cell (PCell) on a first RF band 106, perform establish a connection with an SCell on a second RF band 108. A first RF chain may be activated 112 to transmit and receive data 114 with the PCell on the first RF band 106. A second RF chain used for communication with the SCell on the second RF band 108 may be deactivated since there is no data transmission or reception on the SCell.
[0024] RRM measurement occasions (e.g., RRM measurement occasion 110) for the SCell may based on a Synchronization Signal Block Measurement Timing Configuration (SMTC) . The UE will need to activate the second RF chain for the RRM measurement occasion 110 on the second RF band 108. As shown, the UE may turn the second RF chain on at a first time instance 116 before the RRM measurement occasion 110. However, the switching on of the second RF chain may cause an interruption 118 to the first RF chain.
[0025] After the RRM measurement occasion 110, the UE may turn off the second RF chain for power saving. In the illustrated embodiment, the second RF chain is turned off at a second time instance 120. The switching off of the second RF chain may also cause an interruption 122 to the first RF chain.
[0026] To avoid too much negative impact on system throughput (too much interruption) , 3GPP explicitly defines interruption requirements (e.g., TS38.133 clause 8.2) . In some embodiments, interruption due to RRM measurement on deactivated Secondary Component Carrier (SCC) is allowed with up to 0.5%probability of missed ACK / NACK when the configured measCycleSCell is 640 ms or longer.
[0027] In some embodiments, interruptions during measurements on deactivated SCC may be defined according to the following. In some embodiments, interruptions on PCell or activated SCell (s) due to measurements when an SCell is deactivated are allowed with up to 0.5%probability of missed ACK / NACK when the configured measCycleSCell is 640 ms or longer. If the PCell or activated SCell (s) is not in the same band as the deactivated SCell, the UE may be only allowed to cause interruptions on PCell or activated SCell (s) immediately before and immediately after an SMTC. Each interruption shall not exceed requirement in Table 1.
[0028] If the PCell or activated SCell (s) is non-contiguous to the deactivated SCell in the same FR1 band and UE is capable of intraBandNR-CA-non-collocated-r18 on this FR1 band and nonCollocatedTypeNR-CA-r18 is not provided, the UE may be only allowed to cause interruptions on PCell or activated SCell (s) immediately before and immediately after an SMTC. In some embodiments, each interruption shall not exceed requirement in Table 1 below.
[0029] If the PCell or activated SCell (s) is contiguous to the deactivated SCell in the same FR1 band, or if the PCell or activated SCell (s) is in the same FR1 band as the deactivated SCell and UE is not capable of intraBandNR-CA-non-collocated-r18 or UE is capable of intraBandNR-CA-non-collocated-r18 and nonCollocatedTypeNR-CA-r18 is provided, the UE may be only allowed to cause an interruption on PCell or activated SCell (s) no earlier than X slots before TSMTC_duration and no later than X slots after TSMTC_duration, provided the cell specific reference signals from the active serving cells and the deactivated SCell are available in the same slot, where X and TSMTC_duration are given by Table 1. The interruption shall not exceed requirements in Table 1.
[0030] If the PCell or activated SCell (s) is in the same FR2 band as the deactivated SCell, the UE may be only allowed to cause an interruption on PCell or activated SCell (s) no earlier than X slots before TSMTC_duration and no later than X slots after TSMTC_duration, provided the cell specific reference signals from the active serving cells and the deactivated SCell are available in the same slot, where X and TSMTC_duration are given by Table 1. The interruption shall not exceed requirements in Table 1.
[0031] In some embodiments, the interruption requirements in Table 1 are not applicable when a UE is configured with NCSG in the same frequency range as the SCell unless the SMTC on the deactivated SCC is fully non-overlapped with NCSG. Table 1: Interruption duration for measurement on deactivated SCell for intra-band CA
[0032] FIG. 2 illustrates an example timeline 204 where a UE decides to skip or perform SCell measurements 206 based on a PCell Discontinuous Reception (DRX) cycle 208 in accordance with some embodiments. In legacy systems, a UE can enjoy power saving by smartly choose when to measure the deactivated SCell, given that SSB for RRM measurement is always-on and periodically transmitted by network. For instance, the UE may be configured with DRX. The UE can choose to measure deactivated SCell during DRX off state to avoid interruption.
[0033] For instance, in the illustrated scenario as long as UE measure SMTC during DRX off, there is no interruption due to RRM measurement. For instance, the UE skips the measurement 216 during a DRX on duration 218, and then performs measurement 210 and measurement 214 that occur during a DRX off duration 212.
[0034] On-Demand Synchronization Signal Block (OD-SSB) was introduced as a power-efficient mechanism. Unlike conventional periodic SSB transmissions, OD-SSB is transmitted only when needed, reducing unnecessary signaling and improving spectrum efficiency. This feature may allow a UE to request synchronization signals from the network instead of continuously monitoring for periodic SSBs.
[0035] There may be two different scenarios of how OD-SSB is used. FIG. 3 illustrates an SSB transmission timeline 306 of a first case and an SSB transmission timeline 308 of a second case where OD-SSB is used in accordance with some embodiments.
[0036] The first case (case 1) is a new scenario that is being introduced where there is no always-on SSB. In the new scenario, for network energy saving purpose, network only transmits SSB as necessary. For instance, as shown, the network may send an OD-SSB activation indication 310 to a UE to indicate an upcoming OD-SSB. The OD-SSB activation indication 310 is a control signal sent by the network to indicate when an OD-SSB transmission will occur. This signal provides notice to the UE of when to listen for the OD-SSB, reducing unnecessary power consumption while maintaining synchronization. After the OD-SSB activation indication 310 is sent, the network may send one or more OD-SSB transmissions 312.
[0037] The second case (case 2) is a scenario where always-on SSB and OD-SSB are used. Such a hybrid synchronization strategy can be implemented to optimize power consumption and coverage. For instance, the network may transmit always-on SSBs at a lower periodicity, spacing them further apart than in a traditional system. Further, UEs can request OD-SSB transmissions when needed between the always-on SSB.
[0038] In some embodiment, a new UE measurement framework may be used for OD-SSB. FIG. 4 illustrates an example UE measurement framework 408 for OD-SSB in accordance with some embodiments. This measurement framework 408 may be used for OD-SSB based deactivated SCell measurement (e.g., Case 1 for FIG. 3) .
[0039] Once the UE receives the OD-SSB activation indication 410, the UE may perform the OD-SSB based fast L3 measurement for deactivated SCell within a fast measurement mode time window 412. After the fast measurement mode time window 412, UE can perform deactivated SCell measurement with a slow mode (e.g., measurements during slow measurement mode time window 414) . In some embodiments, the slow mode measurement may include a fallback legacy requirement. In some embodiments, the slow mode measurement may cause the UE to stop measurement. In some embodiments, there may not be a requirement for slow mode measurement.
[0040] The fast L3 measurement may starts immediately when the UE receives an OD-SSB activation indication 410 from the network. It may enable quick evaluation of the deactivated SCell’s signal quality within a short time window. The fast L3 measurement may have a higher power consumption due to frequent and rapid measurements within the short duration. To reduce power consumption, after the fast measurement mode time window 412 for the fast L3 measurement, the UE may perform measurements with a slow mode.
[0041] Fast measurement mode time window 412 may refer to the time duration starting from receiving OD-SSB activation indication. The exact configuration of the time window may be pre-defined or configurable. The relation between time window and OD-SSB deactivation command in the time domain may be configured or pre-defined. When the UE receives OD-SSB deactivation, the UE may not be required to measure the deactivated SCell.
[0042] However, the new UE measurement behavior may result in different interruption to other serving cells which have not been considered in previous wireless communication systems. In some embodiments, a new design for interruption due to RRM measurement on deactivated SCell in the Fast Measurement window may be used. One of the options for RRM measurement on the deactivated SCell in the Fast Measurement window may be that the UE is allowed to cause two interruptions before and after the time window X. After X, the interruption threshold may be the same as a legacy system (e.g., table 1) . Embodiments herein include details for designs for interruption due to RRM measurement on deactivated SCell in the Fast Measurement window.
[0043] FIG. 5 illustrates an OD-SSB timeline 508 for a first scenario where the network activates target SCell within the fast measurement mode window 510 in accordance with some embodiments. In the illustrated embodiment, the UE 514 may turn on the RF chain (e.g., RF on 516) after receiving OD-SSB activation signal 518 from the network 512.
[0044] In some embodiments, the UE 514 may trigger measurement report 520 within fast measurement mode window 510, if event triggered reporting is configured and a corresponding event is met. The triggering of the measurement report 520 may depend on the UE condition. For example, if the UE is near the cell center, then the UE may need fewer samples than are in the total fast measurement mode window 510 to finish the measurement. Based on the subset of OD-SSB samples a measurement may be performed and the measurement report 520 may be sent to the base station.
[0045] Based on the measurement report 520 from the UE, the network 512 may activate a target SCell within fast measurement mode window 510. For example, in the illustrated embodiment, the network 512 may send a SCell activation signal 522 to the UE 514 during the fast measurement mode window 510.
[0046] In some embodiments, after the measurement report 520 is sent, UE is allowed to fallback to slow mode measurement, although it is still within the fast mode fast measurement mode window 510. Because the measurement is already known to the UE, there may not be a need to continue the fast measurement to reduce power consumption. Instead, in some embodiments, the UE may be allowed to fall back to a slow measurement mode during the fast measurement mode window 510 after the measurement report 520 is sent.
[0047] Regarding possible RF chain interruption on other serving cells, in some embodiments the UE may be allowed to cause only one interruption (e.g., RF on 516) during fast measurement mode window 510 in the scenario illustrated in FIG. 5. The interruption location may be after OD-SSB activation delay 524 and before the first OD-SSB occasion 526 after OD-SSB activation delay. The OD-SSB activation delay 524 may be the delay after receiving the OD-SSB activation signal 518 during which the UE prepares for the measurement (e.g., slot n+3+1+Tpreparation) .
[0048] In the illustrated scenario, an interruption due to SCell activation may not be allowed anymore. For instance, the RF chain may remain on from the OD-SSB measurements, and be used for the activated SCell. Thus, the RF chain may not be turned off and on again when the network activates target SCell within the fast measurement window.
[0049] FIG. 6 illustrates an OD-SSB timeline 608 for a second scenario for activating the target SCell in accordance with some embodiments. In the second scenario the network activates target SCell after the fast measurement mode window 610. In the illustrated embodiment, the UE 614 may turn on the RF chain (e.g., RF on 616) after receiving OD-SSB activation signal 618 from the network 612.
[0050] However, in the illustrated scenario, the measurement report 620 is not triggered within the fast measurement mode window 610. Instead, the UE 614 may trigger measurement report 620 after the fast measurement mode window 610 (e.g., during the slow measurement mode 622) , if event triggered reporting is configured and corresponding event is met.
[0051] For example, if during the fast measurement mode window 610 the event condition is not met (e.g., the signal quality is less than a threshold or measurement is not successfully obtained during fast measurement mode window 610) then a measurement report is not sent. The UE may turn the RF chain off 624 and fall back to slow measurement mode 622 after the fast measurement mode window 610 if the SCell is not activated. In the slow measurement mode 622 the measurements may be performed so as to limit interruption to other serving cells (e.g., during DRX off) . In some embodiments, the interruption due to RRM measurement on deactivated SCC during the slow measurement mode 622 may be allowed with up to 0.5%probability of missed ACK / NACK when the configured measCycleSCell is 640 ms or longer.
[0052] In the illustrated embodiment, the UE may determine that a triggering event (e.g., signal quality above a threshold) has been met during the slow measurement mode 622. The UE may send the measurement report 620 to the network. Based on the measurement report 620 from the UE 614, the network 612 may activate a target SCell by sending a SCell activation signal 626 after the fast measurement mode window 610. Accordingly, the UE 614 may once again turn on the RF chain (e.g., RF on 628) after the SCell activation signal 626.
[0053] Regarding possible RF chain interruption on other serving cells, in some embodiments the UE may be allowed to cause two interruptions during fast measurement mode window 610 in the scenario illustrated in FIG. 6. A first interruption location may be after OD-SSB activation delay 630 (e.g., slot n+3+1+Tpreparation) and before the first OD-SSB 632 occasion after OD-SSB activation delay 630 (e.g., RF on 616) . The second interruption location may be after the last OD-SSB occasion 634 in the fast measurement mode window 610 (e.g., RF chain off 624) , or right after the fast measurement mode window 610. Interruption due to SCell activation may still be allowed allowed (e.g., RF on 628) .
[0054] FIG. 7 illustrates an OD-SSB timeline 708 for a third scenario for activating the target SCell in accordance with some embodiments. In the third scenario, the UE 714 sends the measurement report 720 in the fast measurement mode window 710, but the network activates target SCell after the fast measurement mode window 710. In the illustrated embodiment, the UE 714 may turn on the RF chain (e.g., RF on 716) after receiving OD-SSB activation signal 718 from the network 712.
[0055] In the illustrated scenario, the measurement report 720 is triggered within the fast measurement mode window 710, but the SCell activation signal 726 is not sent by the network 712 until after the fast measurement mode window 710. The UE 714 may trigger measurement report 720 during the fast measurement mode window 710 based on a triggering event (e.g., signal quality above a threshold, if event triggered reporting is configured and corresponding event is met. If the SCell activation signal 726 is not received before the end of the fast measurement mode window 710, the UE may turn the RF chain off 724 and fall back to slow measurement mode 722.
[0056] The UE may send the measurement report 720 to the network 712. Based on the measurement report 720 from the UE 714, the network 712 may activate a target SCell by sending a SCell activation signal 726 after the fast measurement mode window 710. The UE 714 may once again turn on the RF chain (e.g., RF on 728) after the SCell activation signal 726.
[0057] Regarding possible RF chain interruption on other serving cells, in some embodiments the UE may be allowed to cause two interruptions during fast measurement mode window 710 in the scenario illustrated in FIG. 7. A first interruption location may be after OD-SSB activation delay 730 (e.g., slot n+3+1+Tpreparation) and before the first OD-SSB 732 occasion after OD-SSB activation delay 730 (e.g., RF on 716) . The second interruption location may be after the last OD-SSB occasion 734 in the fast measurement mode window 710 (e.g., RF chain off 724) , or right after the fast measurement mode window 710. Interruption due to SCell activation may still be allowed allowed (e.g., RF on 728) .
[0058] In some embodiments, multiple RF chains can be implemented on different RFIC. For example, different RFIC for different RF chains may be typically used when they are for different frequency ranges which are far away from each other. In such cases, tuning / retuning of one RF chain may not cause any interruption to other RF chains.
[0059] Some embodiments may introduce a new UE capability "X" regarding when a UE would cause interruption upon OD-SSB activation and / or SCell activation. This capability may be indicated by the UE to the network. In some embodiments, UE capability “X” may be specified per band-combination. For example, depending on the band combination of the serving PCell and the SCell, the UE may have the capability to turn on the RF chain for the SCell without interfering with the PCell if the SCell and the PCell use bands that are supported by different RFIC.
[0060] In some embodiments, the UE capability "X" may be specified as a dynamical feedback based on current Carrier Aggregation (CA) / Dual Connectivity (DC) configuration. For example, if a current CA combination is band A+B, and the network inquiries whether UE would cause interruption upon OD-SSB activation for target band A, B, C, D, the UE may indicate “true” for band A, B and C, and “false” for band D, meaning UE would cause interruption if OD-SSB is activated on band A, B or C, while UE would not cause interruption when OD-SSB is activated only on band D. In this example bands A, B, and C may use RF chains implemented on the same RFIC and band D may use an RF chain implemented on a different RFIC.
[0061] FIG. 8 illustrates a method 800 for a UE, according to embodiments herein. The illustrated method 800 includes receiving 802, from a network node, an OD-SSB activation command. The method 800 further includes turning 804 on a RF chain for a band corresponding to a deactivated SCell during a fast measurement mode window before a first OD-SSB occasion after an OD-SSB activation delay. The method 800 further includes performing 806 OD-SSB based fast layer 3 (L3) measurement for the deactivated SCell during the fast measurement mode window. The method 800 further includes controlling block 808 a power state of the RF chain based on whether an SCell activation signal is received within the fast measurement mode window.
[0062] In some embodiments, the method 800 further comprises sending a measurement report to the network node in the fast measurement mode window; and receiving, from the network node, the SCell activation signal in the fast measurement mode window, wherein in response to receiving the SCell activation signal in the fast measurement mode window the RF chain remains on such that there is only one interruption from turning the RF chain on during the fast measurement mode window.
[0063] In some embodiments, the method 800 further comprises sending a measurement report to the network node in the fast measurement mode window; and transitioning to a slow measurement mode for a remainder of the fast measurement mode window after the measurement report is sent.
[0064] In some embodiments, the method 800 further comprises in response to receiving the SCell activation signal after the fast measurement mode window, turning the RF chain off after a last OD-SSB occasion in the fast measurement mode window or after the fast measurement mode window; and turning on the RF chain after the SCell activation signal is received.
[0065] In some embodiments, the method 800 further comprises sending the network node a UE capability indicating whether OD-SSB activation or SCell activation would cause an interruption to a second RF chain currently configured for communications with a primary cell (PCell) .
[0066] In some embodiments of the method 800, the UE capability is specified per band-combination.
[0067] In some embodiments of the method 800, the UE capability is specified as a dynamical feedback based on current CA and DC configuration.
[0068] FIG. 9 illustrates an example architecture of a wireless communication system 900, according to embodiments disclosed herein. The following description is provided for an example wireless communication system 900 that operates in conjunction with the LTE system standards and / or 5G or NR system standards as provided by 3GPP technical specifications.
[0069] As shown by FIG. 9, the wireless communication system 900 includes UE 902 and UE 904 (although any number of UEs may be used) . In this example, the UE 902 and the UE 904 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.
[0070] The UE 902 and UE 904 may be configured to communicatively couple with a RAN 906. In embodiments, the RAN 906 may be NG-RAN, E-UTRAN, etc. The UE 902 and UE 904 utilize connections (or channels) (shown as connection 908 and connection 910, respectively) with the RAN 906, each of which comprises a physical communications interface. The RAN 906 can include one or more base stations (such as base station 912 and base station 914) that enable the connection 908 and connection 910.
[0071] In this example, the connection 908 and connection 910 are air interfaces to enable such communicative coupling, and may be consistent with RAT (s) used by the RAN 906, such as, for example, an LTE and / or NR.
[0072] In some embodiments, the UE 902 and UE 904 may also directly exchange communication data via a sidelink interface 916. The UE 904 is shown to be configured to access an access point (shown as AP 918) via connection 920. By way of example, the connection 920 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.11 protocol, wherein the AP 918 may comprise a router. In this example, the AP 918 may be connected to another network (for example, the Internet) without going through a CN 924.
[0073] In embodiments, the UE 902 and UE 904 can be configured to communicate using orthogonal frequency division multiplexing (OFDM) communication signals with each other or with the base station 912 and / or the base station 914 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.
[0074] In some embodiments, all or parts of the base station 912 or base station 914 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 912 or base station 914 may be configured to communicate with one another via interface 922. In embodiments where the wireless communication system 900 is an LTE system (e.g., when the CN 924 is an EPC) , the interface 922 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 900 is an NR system (e.g., when CN 924 is a 5GC) , the interface 922 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 912 (e.g., a gNB) connecting to 5GC and an eNB, and / or between two eNBs connecting to 5GC (e.g., CN 924) .
[0075] The RAN 906 is shown to be communicatively coupled to the CN 924. The CN 924 may comprise one or more network elements 926, which are configured to offer various data and telecommunications services to customers / subscribers (e.g., users of UE 902 and UE 904) who are connected to the CN 924 via the RAN 906. The components of the CN 924 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) .
[0076] In embodiments, the CN 924 may be an EPC, and the RAN 906 may be connected with the CN 924 via an S1 interface 928. In embodiments, the S1 interface 928 may be split into two parts, an S1 user plane (S1-U) interface, which carries traffic data between the base station 912 or base station 914 and a serving gateway (S-GW) , and the S1-MME interface, which is a signaling interface between the base station 912 or base station 914 and mobility management entities (MMEs) .
[0077] In embodiments, the CN 924 may be a 5GC, and the RAN 906 may be connected with the CN 924 via an NG interface 928. In embodiments, the NG interface 928 may be split into two parts, an NG user plane (NG-U) interface, which carries traffic data between the base station 912 or base station 914 and a user plane function (UPF) , and the S1 control plane (NG-C) interface, which is a signaling interface between the base station 912 or base station 914 and access and mobility management functions (AMFs) .
[0078] Generally, an application server 930 may be an element offering applications that use internet protocol (IP) bearer resources with the CN 924 (e.g., packet switched data services) . The application server 930 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc. ) for the UE 902 and UE 904 via the CN 924. The application server 930 may communicate with the CN 924 through an IP communications interface 932.
[0079] FIG. 10 illustrates a system 1000 for performing signaling 1034 between a wireless device 1002 and a network device 1018, according to embodiments disclosed herein. The system 1000 may be a portion of a wireless communications system as herein described. The wireless device 1002 may be, for example, a UE of a wireless communication system. The network device 1018 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.
[0080] The wireless device 1002 may include one or more processor (s) 1004. The processor (s) 1004 may execute instructions such that various operations of the wireless device 1002 are performed, as described herein. The processor (s) 1004 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.
[0081] The wireless device 1002 may include a memory 1006. The memory 1006 may be a non-transitory computer-readable storage medium that stores instructions 1008 (which may include, for example, the instructions being executed by the processor (s) 1004) . The instructions 1008 may also be referred to as program code or a computer program. The memory 1006 may also store data used by, and results computed by, the processor (s) 1004.
[0082] The wireless device 1002 may include one or more transceiver (s) 1010 that may include radio frequency (RF) transmitter circuitry and / or receiver circuitry that use the antenna (s) 1012 of the wireless device 1002 to facilitate signaling (e.g., the signaling 1034) to and / or from the wireless device 1002 with other devices (e.g., the network device 1018) according to corresponding RATs.
[0083] The wireless device 1002 may include one or more antenna (s) 1012 (e.g., one, two, four, or more) . For embodiments with multiple antenna (s) 1012, the wireless device 1002 may leverage the spatial diversity of such multiple antenna (s) 1012 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 1002 may be accomplished according to precoding (or digital beamforming) that is applied at the wireless device 1002 that multiplexes the data streams across the antenna (s) 1012 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) .
[0084] In certain embodiments having multiple antennas, the wireless device 1002 may implement analog beamforming techniques, whereby phases of the signals sent by the antenna (s) 1012 are relatively adjusted such that the (joint) transmission of the antenna (s) 1012 can be directed (this is sometimes referred to as beam steering) .
[0085] The wireless device 1002 may include one or more interface (s) 1014. The interface (s) 1014 may be used to provide input to or output from the wireless device 1002. For example, a wireless device 1002 that is a UE may include interface (s) 1014 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) 1010 / antenna (s) 1012 already described) that allow for communication between the UE and other devices and may operate according to known protocols (e.g., and the like) .
[0086] The wireless device 1002 may include an OD-SSB module 1016. The OD-SSB module 1016 may be implemented via hardware, software, or combinations thereof. For example, the OD-SSB module 1016 may be implemented as a processor, circuit, and / or instructions 1008 stored in the memory 1006 and executed by the processor (s) 1004. In some examples, the OD-SSB module 1016 may be integrated within the processor (s) 1004 and / or the transceiver (s) 1010. For example, the OD-SSB module 1016 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) 1004 or the transceiver (s) 1010.
[0087] The OD-SSB module 1016 may be used for various aspects of the present disclosure, for example, aspects of FIGS. 1-9.
[0088] The network device 1018 may include one or more processor (s) 1020. The processor (s) 1020 may execute instructions such that various operations of the network device 1018 are performed, as described herein. The processor (s) 1020 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.
[0089] The network device 1018 may include a memory 1022. The memory 1022 may be a non-transitory computer-readable storage medium that stores instructions 1024 (which may include, for example, the instructions being executed by the processor (s) 1020) . The instructions 1024 may also be referred to as program code or a computer program. The memory 1022 may also store data used by, and results computed by, the processor (s) 1020.
[0090] The network device 1018 may include one or more transceiver (s) 1026 that may include RF transmitter circuitry and / or receiver circuitry that use the antenna (s) 1028 of the network device 1018 to facilitate signaling (e.g., the signaling 1034) to and / or from the network device 1018 with other devices (e.g., the wireless device 1002) according to corresponding RATs.
[0091] The network device 1018 may include one or more antenna (s) 1028 (e.g., one, two, four, or more) . In embodiments having multiple antenna (s) 1028, the network device 1018 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc., as has been described.
[0092] The network device 1018 may include one or more interface (s) 1030. The interface (s) 1030 may be used to provide input to or output from the network device 1018. For example, a network device 1018 that is a base station may include interface (s) 1030 made up of transmitters, receivers, and other circuitry (e.g., other than the transceiver (s) 1026 / antenna (s) 1028 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.
[0093] The network device 1018 may include an OD-SSB module 1032. The OD-SSB module 1032 may be implemented via hardware, software, or combinations thereof. For example, the OD-SSB module 1032 may be implemented as a processor, circuit, and / or instructions 1024 stored in the memory 1022 and executed by the processor (s) 1020. In some examples, the OD-SSB module 1032 may be integrated within the processor (s) 1020 and / or the transceiver (s) 1026. For example, the OD-SSB module 1032 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) 1020 or the transceiver (s) 1026.
[0094] The OD-SSB module 1032 may be used for various aspects of the present disclosure, for example, aspects of FIGS. 1-9.
[0095] 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 1002 that is a UE, as described herein) .
[0096] 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 1006 of a wireless device 1002 that is a UE, as described herein) .
[0097] 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 1002 that is a UE, as described herein) .
[0098] 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 1002 that is a UE, as described herein) .
[0099] Embodiments contemplated herein include a signal as described in or related to one or more elements of the method 800.
[0100] 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) 1004 of a wireless device 1002 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 1006 of a wireless device 1002 that is a UE, as described herein) .
[0101] 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.
[0102] 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.
[0103] 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.
[0104] 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.
[0105] 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.
[0106] 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 performed by a user equipment (UE) , the method comprising:receiving, from a network node, an On-Demand Synchronization Signal Block (OD-SSB) activation command;turning on a radio frequency (RF) chain for a band corresponding to a deactivated Secondary Cell (SCell) during a fast measurement mode window before a first OD-SSB occasion after an OD-SSB activation delay;performing OD-SSB based fast layer 3 (L3) measurement for the deactivated SCell during the fast measurement mode window; andcontrolling a power state of the RF chain based on whether an SCell activation signal is received within the fast measurement mode window.2.The method of claim 1, further comprising:sending a measurement report to the network node in the fast measurement mode window; andreceiving, from the network node, the SCell activation signal in the fast measurement mode window,wherein in response to receiving the SCell activation signal in the fast measurement mode window the RF chain remains on such that there is only one interruption from turning the RF chain on during the fast measurement mode window.3.The method of claim 1, further comprising:sending a measurement report to the network node in the fast measurement mode window; andtransitioning to a slow measurement mode for a remainder of the fast measurement mode window after the measurement report is sent.4.The method of claim 1, further comprising:in response to receiving the SCell activation signal after the fast measurement mode window, turning the RF chain off after a last OD-SSB occasion in the fast measurement mode window or after the fast measurement mode window; andturning on the RF chain after the SCell activation signal is received.5.The method of claim 1, further comprising sending the network node a UE capability indicating whether OD-SSB activation or SCell activation would cause an interruption to a second RF chain currently configured for communications with a primary cell (PCell) .6.The method of claim 5, wherein the UE capability is specified per band-combination.7.The method of claim 5, wherein the UE capability is specified as a dynamical feedback based on current Carrier Aggregation (CA) and Dual Connectivity (DC) configuration.8.A user equipment (UE) apparatus comprising:a processor; anda memory storing instructions that, when executed by the processor, configure the apparatus to:receive, from a network node, an On-Demand Synchronization Signal Block (OD-SSB) activation command;turn on a radio frequency (RF) chain for a band corresponding to a deactivated Secondary Cell (SCell) during a fast measurement mode window before a first OD-SSB occasion after an OD-SSB activation delay;perform OD-SSB based fast layer 3 (L3) measurement for the deactivated SCell during the fast measurement mode window; andcontrol a power state of the RF chain based on whether an SCell activation signal is received within the fast measurement mode window.9.The UE apparatus of claim 8, wherein the instructions further configure the apparatus to:send a measurement report to the network node in the fast measurement mode window; andreceive, from the network node, the SCell activation signal in the fast measurement mode window,wherein in response to receiving the SCell activation signal in the fast measurement mode window the RF chain remains on such that there is only one interruption from turning the RF chain on during the fast measurement mode window.10.The UE apparatus of claim 8, wherein the instructions further configure the apparatus to:send a measurement report to the network node in the fast measurement mode window; andtransitioning to a slow measurement mode for a remainder of the fast measurement mode window after the measurement report is sent.11.The UE apparatus of claim 8, wherein the instructions further configure the apparatus to:in response to receiving the SCell activation signal after the fast measurement mode window, turn the RF chain off after a last OD-SSB occasion in the fast measurement mode window or after the fast measurement mode window; andturn on the RF chain after the SCell activation signal is received.12.The UE apparatus of claim 8, wherein the instructions further configure the apparatus to send the network node a UE capability indicating whether OD-SSB activation or SCell activation would cause an interruption to a second RF chain currently configured for communications with a primary cell (PCell) .13.The UE apparatus of claim 12, wherein the UE capability is specified per band-combination.14.The UE apparatus of claim 12, wherein the UE capability is specified as a dynamical feedback based on current Carrier Aggregation (CA) and Dual Connectivity (DC) configuration.15.A non-transitory computer-readable storage medium, the computer-readable storage medium including instructions that when executed by a computer, cause the user equipment (UE) to:receive, from a network node, an On-Demand Synchronization Signal Block (OD-SSB) activation command;turn on a radio frequency (RF) chain for a band corresponding to a deactivated Secondary Cell (SCell) during a fast measurement mode window before a first OD-SSB occasion after an OD-SSB activation delay;perform OD-SSB based fast layer 3 (L3) measurement for the deactivated SCell during the fast measurement mode window; andcontrol a power state of the RF chain based on whether an SCell activation signal is received within the fast measurement mode window.16.The computer-readable storage medium of claim 15, wherein the instructions further configure the UE to:send a measurement report to the network node in the fast measurement mode window; andreceive, from the network node, the SCell activation signal in the fast measurement mode window,wherein in response to receiving the SCell activation signal in the fast measurement mode window the RF chain remains on such that there is only one interruption from turning the RF chain on during the fast measurement mode window.17.The computer-readable storage medium of claim 15, wherein the instructions further configure the UE to:send a measurement report to the network node in the fast measurement mode window; andtransitioning to a slow measurement mode for a remainder of the fast measurement mode window after the measurement report is sent.18.The computer-readable storage medium of claim 15, wherein the instructions further configure the UE to:in response to receiving the SCell activation signal after the fast measurement mode window, turn the RF chain off after a last OD-SSB occasion in the fast measurement mode window or after the fast measurement mode window; andturn on the RF chain after the SCell activation signal is received.19.The computer-readable storage medium of claim 15, wherein the instructions further configure the UE to send the network node a UE capability indicating whether OD-SSB activation or SCell activation would cause an interruption to a second RF chain currently configured for communications with a primary cell (PCell) .20.The computer-readable storage medium of claim 19, wherein the UE capability is specified per band-combination, or as a dynamical feedback based on current Carrier Aggregation (CA) and Dual Connectivity (DC) configuration.