Carrier-specific scaling factor enhancement with channel state information reference signal measurement compression
By optimizing CSI-RS measurement compression and resource allocation in CSSF calculations, the proposed methods address inefficiencies in measurement delays and resource constraints, enhancing the efficiency of wireless communication systems.
Patent Information
- Application Number
- PCT/CN2024/108476
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2026-02-05
AI Technical Summary
Existing wireless communication systems face inefficiencies in carrier-specific scaling factor (CSSF) calculations for measurement delays in carrier aggregation (CA) and dual connectivity (DC) modes, particularly in CSI-RS based L3 measurements, leading to prolonged measurement times and resource constraints.
The proposed methods enhance CSSF by optimizing CSI-RS measurement compression through strategies such as releasing measurement resource instances when SSB and CSI-RS measurements are configured on different CCs, utilizing representative SSBs for CSI-RS measurements, and applying scaling factors to adjust measurement resource availability, thereby reducing measurement delays and freeing up resources for SSB based L3 measurements.
The enhanced CSSF methods significantly reduce measurement times and optimize resource allocation, improving the efficiency of wireless communication systems by allowing faster and more effective CSI-RS and SSB based L3 measurements.
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Figure CN2024108476_05022026_PF_FP_ABST
Abstract
Description
CARRIER-SPECIFIC SCALING FACTOR ENHANCEMENT WITH CHANNEL STATE INFORMATION REFERENCE SIGNAL MEASUREMENT COMPRESSIONTECHNICAL FIELD
[0001] This application relates generally to wireless communication systems, including systems, apparatuses, and methods in which a user equipment (UE) determines a carrier-specific scaling factor (CSSF) for scaling standardized measurement delay requirements in a carrier aggregation (CA) or dual connectivity (DC) mode of operation.BACKGROUND
[0002] Wireless mobile communication technology uses various standards and protocols to transmit data between a network device (e.g., a base station, a radio head, etc. ) 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 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 network device 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 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 network device 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 network device used by a RAN may correspond to that RAN. One example of an E-UTRAN network device 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 network device 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) .BRIEF DESCRIPTION OF THE DRAWINGS
[0007] 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.
[0008] FIGs. 1A and 1B show example wireless communications systems, according to one or more aspects described herein..
[0009] FIGs. 2A-2D show various configurations of component carriers (CCs) that may established over the downlinks (DLs) or uplinks (ULs) described with reference to FIGs. 1A and 1B, according to one or more aspects described herein.
[0010] FIGs. 3-6 show example methods of wireless communication by a UE, according to one or more aspects described herein.
[0011] FIG. 7 illustrates an example architecture of a wireless communication system, according to one or more aspects described herein.
[0012] FIG. 8 illustrates an example system for performing signaling between a wireless device and a network device, according to one or more aspects described herein.DETAILED DESCRIPTION
[0013] Various embodiments are described with regard to a user equipment (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 a network. Therefore, the UE as described herein is used to represent any appropriate electronic device (e.g., a mobile phone, a computer (e.g., a laptop or tablet computer) , a wearable device (e.g., an electronic watch, fitness device, or head-mounted device) , or an Internet of Things (IoT) device) .
[0014] Section 9.1.5 of 3GPP Technical Specification (TS) 38.133 (V18.5.0) defines a carrier-specific scaling factor (CSSF) for scaling standardized measurement delay requirements in a carrier aggregation (CA) or dual connectivity (DC) mode of operation. That is, a CSSF may be used to coordinate the use of a measurement resource (e.g., a measurement object) among different component carriers (CCs) that are configured for a UE operated in a CA mode or a DC mode. For example, if a UE is operated in a CA mode, there will be multiple CCs for which measurements need to be performed, but the UE may have limited measurement resources. In such a case, and as an example, a measurement resource may be coordinated between CCs by giving a primary CC (PCC) most of the measurement resource’s availability, and splitting the rest of the measurement resource’s availability between other carriers (e.g., secondary CCs (SCCs) ) . A CSSF quantifies the extent to which a measurement resource needs to be split.
[0015] If all SCCs equally share the same measurement resource and searcher (with the PCC getting its own searcher when there are two searchers) , then the measurement delay incurred to perform all necessary measurements can be long. One searcher can only measure one CC within one time instance of a measurement resource. So, if ten SCCs need to be measured, the total measurement delay would be 10 *T (where T is the periodicity of the measurement resource) .
[0016] The following description is primarily directed to different ways in which a CSSF outside a measurement gap (e.g., CSSFoutside_gap, i in 3GPP TS 38.133) can be enhanced, and measurements performed, to reduce the time it takes to perform all necessary measurements (e.g., by CSI-RS compression) , or to free up more of a measurement resource’s availability (e.g., time instances) for one type of measurement over another (e.g., for synchronization signal block (SSB) based Layer 3 (L3) measurements over channel state information (CSI) reference signal (CSI-RS) based L3 measurements) .
[0017] In some embodiments, a CSSF value is lowered by decreasing the number of SSB based L3 measurements that need to be performed prior to CSI-RS based L3 measurements. In some embodiments, fewer CSI-RS based L3 measurements may be performed (e.g., because some CSI-RS based L3 measurements may serve as representations of other CSI-RS based L3 measurements) . In some embodiments, measurement resources or searcher resources may be scaled by a scaling factor that adjusts the split of a resource’s availability for measurements performed on different CCs.
[0018] FIGs. 1A and 1B show example wireless communications systems, according to one or more aspects described herein.
[0019] FIG. 1A shows a wireless communications system 100 including a UE 102 and a network device 104. The UE 102 may be served by (e.g., have an established radio resource control (RRC) connection with) one or more serving cells of the network device 104 (e.g., via a downlink (DL) 106 and an uplink (UL) 108) . Each of the DL 106 and UL 108 may include one or more CCs.
[0020] FIG. 1B shows a wireless communications system 110 including a UE 112, a network device 104-1, and a network device 104-2. The UE 102 may be served by (e.g., have an established radio resource control (RRC) connection with) one or more serving cells of the network devices 104-1, 104-2 (e.g., via DLs 116-1, 116-2 and ULs 118-1, 118-2. Each of the DLs 116-1, 116-2 and ULs 118-1, 118-2 may include one or more CCs.
[0021] FIGs. 2A-2D show various configurations of CCs that may established over the DLs or ULs described with reference to FIGs. 1A and 1B.
[0022] FIG. 2A shows an example 200 of intra-band, contiguous CCs (e.g., three CCs 202, 204, 206 within a frequency Band 1) .
[0023] FIG. 2B shows an example 210 of intra-band, non-contiguous CCs (e.g., three CCs 212, 214, 216 within a frequency Band 1, with separation between CCs 214 and 216) .
[0024] FIG. 2C shows an example 220 of inter-band, non-contiguous CCs (e.g., two CCs 222, 224 within a frequency Band 1, and one CC 226 within a frequency Band 2) .
[0025] FIG. 2D shows an example 230 of inter-band, adjacent CCs (e.g., a CC 232 within a frequency Band 1, adjacent a CC 234 within a frequency Band 2, in which Bands 1 and 2 are adjacent, and CCs 232 and 234 are adjacent) .
[0026] In some embodiments, the frequency Bands 1 and 2 may respectively correspond to frequency bands within 5G frequency range FR1, FR2-1, or FR-2.
[0027] One way to provide CSI-RS measurement compression is described with reference to FIG. 3. As described with reference to FIG. 3, if the associated SSB for a CSI-RS based L3 measurement configured on a target serving CC is on a different serving CC than the target serving CC, then an SSB measurement resource instance for the target serving CC can be released and does not require increase the CSSF value.
[0028] FIG. 3 shows an example method 300 of wireless communication by a UE. In some cases, the UE may be the UE or wireless device 102, 704, or 802, or one of the other UEs described herein. In some cases, the method 300 may be performed by a baseband processor of the UE, using a transceiver of the UE or other components of the UE. The baseband processor may include a memory, and the memory may store instructions that, when executed by the baseband processor, cause the baseband processor to perform the method 300. The transceiver may be operable to transmit and receive over an air interface, using a set of antenna elements of the UE.
[0029] At 302, the method 300 may include determining a first number (e.g., a first count) of secondary serving cells (secondary cells or SCell (s) ) configured for the UE. Each SCell in the first number of SCells has a respective first target serving CC. The respective first target serving CC for an SCell that is counted as one of the first number of SCells may have one of two different measurement configurations. In accord with one measurement configuration, both a first SSB based L3 measurement and a first CSI-RS based L3 measurement are configured on the respective first target serving CC, and an associated first SSB for the first CSI-RS based L3 measurement is on the respective first target serving CC. In accord with a second measurement configuration, only the first CSI-RS based L3 measurement is configured on the respective first target serving CC, and the associated first SSB for the first CSI-RS based L3 measurement is on the respective first target serving CC.
[0030] At 304, the method 300 may include determining a second number (e.g., a second count) of SCell (s) configured for the UE. Each SCell in the second number of SCells has a respective second target serving CC. The respective second target serving CC for an SCell that is counted as one of the second number of SCells may have one of three different measurement configurations. In accord with one measurement configuration, both a second SSB based L3 measurement and a second CSI-RS based L3 measurement are configured on the respective second target serving CC, and an associated second SSB for the second CSI-RS based L3 measurement is on a different serving CC than the respective second target serving CC. In accord with a second measurement configuration, only the second CSI-RS based L3 measurement is configured on the respective second target serving CC, and the associated second SSB for the second CSI-RS based L3 measurement is on a different serving CC than the respective second target serving CC. In accord with a third measurement configuration, the second CSI-RS based L3 measurement is configured on the respective second target serving CC, and the respective second target CC is SSB-less.
[0031] At 306, the method 300 may include determining, based at least in part on the first number of configured SCells and / or the second number of configured SCell (s) , a CSSF value for a measurement object outside a measurement gap.
[0032] The method 300 may be variously embodied, extended, or adapted, as described in the following paragraphs and elsewhere in this description.
[0033] As an example of the method 300, consider the factor 2*NSCC_CSIRS of the CSSF value (e.g., CSSFoutside_gap, i) described with reference to Table 9.1.5.1.2-1 in Section 9.1.5.1 of 3GPP TS 38.133 (V18.5.0) . NSCC_CSIRS is indicated in Note 7 of Table 9.1.5.1.2-1 to be a number of configured SCell (s) with either 1) both SSB and CSI-RS based L3 measurements configured, or 2) only a CSI-RS based L3 measurement configured. However, in accord with the method 300, a first factor (2*NSCC_CSIRS_1; two times the first number of SCell (s) configured for the UE) and a second factor (NSCC_CSIRS_2; the second number of SCell (s) configured for the UE) may be determined, and the factor 2*NSCC_CSIRS may be replaced with, for example, the multi-factor quantity of 2*NSCC_CSIRS_1 + NSCC_CSIRS_2. In this manner, the CSSF value CSSFoutside_gap, i is increased by 2 (i.e., two measurement resource instances) for an SCell that is configured for the UE and has a respective first target serving CC that requires both a first SSB based L3 measurement and a first CSI-RS based L3 measurement to be performed; and the CSSF value CSSFoutside_gap, i is increased by only one (i.e., one measurement resource instance) for an SCell that is configured for the UE and has a respective second target serving CC that requires only a second CSI-RS based L3 measurement, thus releasing a measurement resource instance for the respective first target serving CC over what is currently required by Table 9.1.5.1.2-1 in Section 9.1.5.1 of 3GPP TS 38.133 (V18.5.0) .
[0034] As another example of the method 300, consider an SCell having a target serving CC (e.g., SCC1) . If both an SSB based L3 measurement and a CSI-RS based L3 measurement are configured on SCC1 and an associated SSB for the CSI-RS based L3 measurement is on another serving CC (e.g., a PCC, PSCC, or different SCC) , then the SCell is included in the second number of SCell (s) discussed above, and the CSSF value for the measurement object outside the measurement gap does not need to be incremented for the SSB based L3 measurement configured on SCC1, because the CSI-RS based L3 measurement configured on SCC1 need only wait for an SSB based L3 measurement configured on the other serving CC to be performed (and not the SSB based L3 measurement configured on SCC1) . Similarly, if only a CSI-RS based L3 measurement is configured on SCC1 and an associated SSB for the CSI-RS based L3 measurement is on another serving CC (e.g., a PCC, PSCC, or different SCC) , then the SCell is included in the second number of SCell (s) discussed above, and the CSSF value for the measurement object outside the measurement gap does not need to be incremented for the SSB based L3 measurement configured on SCC1. Also, if a CSI-RS based L3 measurement is configured on SCC1 and SCC1 is SSB-less, then the SCell is included in the second number of SCell (s) discussed above, and the CSSF value for the measurement object outside the measurement gap does not need to be incremented for an SSB based L3 measurement configured on SCC1.
[0035] As another example of the method 300, consider the factor NSCC_CSIRS_FR2_NCM of the CSSF value (CSSFoutside_gap, i) described with reference to Table 9.1.5.1.2-1 in Section 9.1.5.1 of 3GPP TS 38.133 (V18.5.0) . Note 8 of Table 9.1.5.1.2-1 indicates that “NSCC_CSIRS_FR2_NCM=1 if FR2 SCC, where neighbor cell measurement is required, is with either both SSB and CSI-RS configured or only CSI-RS measurement configured; otherwise, NSCC_CSIRS_FR2_NCM=0. ” However, in accord with the method 300, the first number of SCell (s) configured for the UE and the second number of SCell (s) configured for the UE may be determined, and the factor NSCC_CSIRS_FR2_NCM may not be incremented by one for any of the SCell (s) in the second number of SCell (s) , which second number of SCell (s) includes the FR2 SCCs where neighbor cell measurement is required.
[0036] Another way to provide CSI-RS measurement compression is described with reference to FIG. 4. As described with reference to FIG. 4, if the associated SSB for a CSI-RS based L3 measurement configured on a target serving CC is on the target serving CC (i.e., both the associated SSB and the CSI-RS based L3 measurement are on the same CC) , a measurement resource instance for the SSB associated with the CSI-RS based L3 measurement configured on the target serving CC can be released if there is another SSB that can be measured, such that the measurement of the other SSB represents the measurement of the SSB that is associated with the CSI-RS based L3 measurement configured on the target serving CC.
[0037] FIG. 4 shows an example method 400 of wireless communication by a UE. In some cases, the UE may be the UE or wireless device 102, 704, or 802, or one of the other UEs described herein. In some cases, the method 400 may be performed by a baseband processor of the UE, using a transceiver of the UE or other components of the UE. The baseband processor may include a memory, and the memory may store instructions that, when executed by the baseband processor, cause the baseband processor to perform the method 400. The transceiver may be operable to transmit and receive over an air interface, using a set of antenna elements of the UE.
[0038] At 402, and for each of a number of SCells configured for the UE, the method 400 may include determining the SCell has a respective target serving CC, the respective target serving CC having one of two different measurement configurations. In accord with one measurement configuration, both an SSB based L3 measurement and a CSI-RS based L3 measurement are configured on the respective target serving CC, and an associated SSB for the CSI-RS based L3 measurement is on the respective target serving CC. In accord with a second measurement configuration, only the CSI-RS based L3 measurement is configured on the respective target serving CC, and the associated SSB for the CSI-RS based L3 measurement is on the respective target serving CC.
[0039] At 404, the method 400 may include determining another SSB, the other SSB on a different CC than the respective target serving CC, represents the associated SSB for the CSI-RS based L3 measurement configured on the respective target serving CC.
[0040] At 406, the method 400 may include incrementing a CSSF value for a measurement object outside a measurement gap by only one, instead of two, for the SCell configured for the UE and having the respective target serving CC.
[0041] At 408, the method 400 may include only measuring one of 1) the associated SSB for the CSI-RS based L3 measurement configured on the respective target serving CC, or 2) the SSB that is on the different CC and represents the associated SSB for the CSI-RS based L3 measurement configured on the respective target serving CC, before performing the CSI-RS based L3 measurement configured on the respective target serving CC. In some embodiments, it may be easier to measure the SSB that is on the different CC and represents the associated SSB for the CSI-RS based L3 measurement configured on the respective target serving CC.
[0042] The method 400 may be variously embodied, extended, or adapted, as described in the following paragraphs and elsewhere in this description.
[0043] In some embodiments of the method 400, the different CC at 404 (i.e., the CC that carries the other or “representative” SSB) may be an intra-band contiguous CC with respect to the respective target serving CC, or an intra-band non-contiguous CC with respect to the respective target serving CC.
[0044] In some embodiments of the method 400, the different CC at 404 may be an intra-band adjacent CC with respect to the respective target serving CC.
[0045] In some embodiments, the method 400 may include receiving an indication of the other SSB (or “representative” SSB) from a network device.
[0046] As an example of the method 400, consider the factor 2*NSCC_CSIRS of the CSSF value (e.g., CSSFoutside_gap, i) described with reference to Table 9.1.5.1.2-1 in Section 9.1.5.1 of 3GPP TS 38.133 (V18.5.0) . In accord with the method 400, an SCell and respective target serving CC having the characteristics described at 402 may be excluded from NSCC_CSIRS and scale (increment) the CCSF value by one instead of two.
[0047] In some embodiments, the method 400 may be combined with the method 300. In these embodiments, and by way of example, NSCC_CSIRS_1 and NSCC_CSIRS_2 may be computed as described with reference to FIG. 3, and a number of SCells having respective target serving CCs with the characteristics described at 402 may be determined (e.g., as NSCC_CSIRS_3) . The factor 2*NSCC_CSIRS may then be replaced with, for example, the multi-factor quantity of 2*NSCC_CSIRS_1 + NSCC_CSIRS_2 + NSCC_CSIRS_3. In this manner, the CSSF value CSSFoutside_gap, i is increased by 2 (i.e., two measurement resource instances) for an SCell that is configured for the UE and has a respective first target serving CC that requires both a first SSB based L3 measurement and a first CSI-RS based L3 measurement to be performed; and the CSSF value CSSFoutside_gap, i is increased by only one measurement resource instance otherwise.
[0048] As another example of the method 400, consider an SCell having a target serving CC (e.g., SCC1) . If both an SSB based L3 measurement and a CSI-RS based L3 measurement are configured on SCC1, and if an associated SSB for the CSI-RS based L3 measurement is on the target serving CC, and if there is an SSB that represents the measurement of the associated SSB for the CSI-RS based L3 measurement configured on SCC1 (e.g., a PCC, primary SCC (PSCC) , or different SCC that is an intra-band contiguous or non-contiguous CC with respect to SSC1, or an inter-band adjacent CC with respect to SCC1) , then the SCell is included in the second number of SCell (s) discussed above (e.g., as NSCC_CSIRS_3) , and the CSSF value for the measurement object outside the measurement gap does not need to be incremented for the SSB based L3 measurement configured on SCC1, because the CSI-RS based L3 measurement configured on SCC1 need only wait for a measurement of the representative SSB to be performed (and not the SSB based L3 measurement configured on SCC1) . The timing information from the representative SSB measurement can be used to perform the CSI-RS based L3 measurement configured on SCC1.
[0049] As another example of the method 400, consider the factor NSCC_CSIRS_FR2_NCM of the CSSF value (CSSFoutside_gap, i) described with reference to Table 9.1.5.1.2-1 in Section 9.1.5.1 of 3GPP TS 38.133 (V18.5.0) . In accord with the method 400, the factor NSCC_CSIRS_FR2_NCM may not be incremented by one for an SCell and respective target serving CC having the characteristics described at 402.
[0050] Another way to provide CSI-RS measurement compression is described with reference to FIG. 5. As described with reference to FIG. 5, if a UE has a CSI-RS based L3 measurement configured for a CC that is an intra-band CC or inter-band adjacent CC with respect to a target serving CC, the UE may only need to perform one of the CSI-RS measurements, and the one CSI-RS measurement may represent both CCs.
[0051] FIG. 5 shows an example method 500 of wireless communication by a UE. In some cases, the UE may be the UE or wireless device 102, 704, or 802, or one of the other UEs described herein. In some cases, the method 500 may be performed by a baseband processor of the UE, using a transceiver of the UE or other components of the UE. The baseband processor may include a memory, and the memory may store instructions that, when executed by the baseband processor, cause the baseband processor to perform the method 500. The transceiver may be operable to transmit and receive over an air interface, using a set of antenna elements of the UE.
[0052] At 502, the method 500 may include determining a first CSI-RS based L3 measurement is configured on a first target serving CC of the UE.
[0053] At 504, the method 500 may include determining a second CSI-RS based L3 measurement is configured on a second target serving CC of the UE.
[0054] At 506, the method 500 may include determining the first target serving CC and the second target serving CC are intra-band CCs or inter-band adjacent CCs.
[0055] At 508, the method 500 includes incrementing a factor of a CSSF value by no more than one for the combination of the first CSI-RS based L3 measurement and the second CSI-RS based L3 measurement. In some embodiments, the factor may be 2*NSCC_CSIRS , and may be incremented by one, or the factor may be NSCC_CSIRS_FR2_NCM and may not be incremented.
[0056] At 510, the method 500 may include causing no more than one of the first CSI-RS based L3 measurement and the second CSI-RS based measurement to be performed by the UE.
[0057] The method 500 may be variously embodied, extended, or adapted, as described in the following paragraphs and elsewhere in this description.
[0058] In some embodiments, the method 500 may include determining a third (or additional) CSI-RS based L3 measurement is configured on a third (or additional) target serving CC of the UE. In these embodiments, the operation (s) at 506 may include determining the first, second, and third (or additional) target serving CCs are intra-band CCs or inter-band adjacent CCs; the operation (s) at 508 may include incrementing the factor of the CSSF value by no more than one for the combination of the first CSI-RS based L3 measurement, the second CSI-RS based L3 measurement, and the third CSI-RS based L3 measurement; and the operation (s) at 510 may include causing no more than one of the first CSI-RS based L3 measurement, the second CSI-RS based measurement, and the third CSI-RS based L3 measurement to be performed by the UE.
[0059] As another example of the method 500, consider a UE configured with CSI-RS based L3 measurements on a first target serving CC (e.g., SCC1) and a second target serving CC (e.g., SCC2) . If SCC1 and SCC2 are intra-band CCs or inter-band adjacent CCs, one of the CSI-RS based L3 measurements may be skipped, and the measurement that is performed may be considered representative of the other measurement.
[0060] Another way to provide CSI-RS measurement compression is described with reference to FIG. 6. As described with reference to FIG. 6, a measurement resource availability or searcher resource availability for CSI-RS L3 measurements may be scaled to provide fewer resources for CSI-RS based L3 measurements. This can provide more resources for, and speed up, SSB based L3 measurements, which can be useful for mobility purposes.
[0061] FIG. 6 shows an example method 600 of wireless communication by a UE. In some cases, the UE may be the UE or wireless device 102, 704, or 802, or one of the other UEs described herein. In some cases, the method 600 may be performed by a baseband processor of the UE, using a transceiver of the UE or other components of the UE. The baseband processor may include a memory, and the memory may store instructions that, when executed by the baseband processor, cause the baseband processor to perform the method 600. The transceiver may be operable to transmit and receive over an air interface, using a set of antenna elements of the UE.
[0062] At 602, the method 600 may include receiving, from a network device, a scaling factor.
[0063] At 604, the method 600 may include applying the scaling factor to at least one of a measurement resource availability for CSI-RS based L3 measurements or a searcher resource availability for CSI-RS based L3 measurements. The application of the scaling factor alters a relationship between 1) an availability of the measurement resource or the searcher resource for SSB based L3 measurements, and 2) an availability of the measurement resource or the searcher resource for CSI-RS based L3 measurements.
[0064] The method 600 may be variously embodied, extended, or adapted, as described in the following paragraphs and elsewhere in this description.
[0065] In some embodiments of the method 600, application of the scaling factor may increase the availability of the measurement resource or the searcher resource for SSB based L3 measurements relative to the availability of the measurement resource or the searcher resource for CSI-RS based L3 measurements.
[0066] In some embodiments of the method 600, the scaling factor may be applied to a factor of a CSSF value. In some embodiments, the factor of the CSSF value may be one of NSCC_CSIRS or NSCC_CSIRS_FR2_NCM.
[0067] The scaling factor, X, may be signaled by the network device in radio resource control (RRC) signaling or a medium access control (MAC) control element (MAC CE) . In some embodiments, X may be signaled explicitly. For example, values of X = 1, 2, 4, or 8 may be signaled as 0001, 0010, 0100, or 1000. In some embodiments, values of X = 1, 2, 4, or 8 may be signaled in a compressed manor (e.g., by 00 for “1” ; 01 for “2” ; 10 for “4” ; and 11 for “8” ) .
[0068] As an example of the method 600, a scaling factor of 1 may indicate “no scaling” , and a scaling factor of 2 may indicate that the availability of the measurement resource or the searcher resource for CSI-RS based L3 measurements is linearly reduced to 50%of a default (no scaling) availability.
[0069] Embodiments contemplated herein include one or more non-transitory computer-readable media storing 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 300, 400, 500, or 600. This non-transitory computer-readable media may be, for example, a memory of a UE (such as a memory 806 of a wireless device 802 that is a UE, as described herein) .
[0070] Embodiments contemplated herein include an apparatus having logic, modules, or circuitry to perform one or more elements of the method 300, 400, 500, or 600. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 802 that is a UE) .
[0071] Embodiments contemplated herein include an apparatus having one or more processors and one or more computer-readable media, using or storing 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 300, 400, 500, or 600. This apparatus may be, for example, an apparatus of a UE (such as a wireless device 802 that is a UE, as described herein) .
[0072] Embodiments contemplated herein include a signal as described in or related to one or more elements of the method 300, 400, 500, or 600.
[0073] Embodiments contemplated herein include a computer program or computer program product having instructions, wherein execution of the program by a processor causes the processor to carry out one or more elements of the method 300, 400, 500, or 600. The processor may be a processor of a UE (such as a processor (s) 804 of a wireless device 802 that is a UE, as described herein) , and the instructions may be, for example, located in the processor and / or on a memory of the UE (such as a memory 806 of a wireless device 802 that is a UE, as described herein) .
[0074] FIG. 7 illustrates an example architecture of a wireless communication system, according to embodiments described herein. The following description is provided for an example wireless communication system 700 that operates in conjunction with the LTE system standards or specifications and / or 5G or NR system standards or specifications, as provided by 3GPP technical specifications.
[0075] As shown, the wireless communication system 700 includes UE 702 and UE 704 (although any number of UEs may be used) . In this example, the UE 702 and the UE 704 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.
[0076] The UE 702 and UE 704 may be configured to communicatively couple with a RAN 706. In embodiments, the RAN 706 may be NG-RAN, E-UTRAN, etc. The UE 702 and UE 704 utilize connections (or channels) (shown as connection 708 and connection 710, respectively) with the RAN 706, each of which comprises a physical communications interface. The RAN 706 can include one or more network devices, such as base station 712 and base station 714, that enable the connection 708 and connection 710.
[0077] In this example, the connection 708 and connection 710 are air interfaces to enable such communicative coupling and may be consistent with RAT (s) used by the RAN 706, such as, for example, an LTE and / or NR.
[0078] In some embodiments, the UE 702 and UE 704 may also directly exchange communication data via a sidelink interface 716. The UE 704 is shown to be configured to access an access point (shown as AP 718) via connection 720. By way of example, the connection 720 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.11 protocol, wherein the AP 718 may comprise a router. In this example, the AP 718 may be connected to another network (for example, the Internet) without going through a CN 724.
[0079] In embodiments, the UE 702 and UE 704 can be configured to communicate using orthogonal frequency-division multiplexing (OFDM) communication signals with each other or with the base station 712 and / or the base station 714 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.
[0080] In some embodiments, all or parts of the base station 712 or base station 714 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 712 or base station 714 may be configured to communicate with one another via interface 722. In embodiments where the wireless communication system 700 is an LTE system (e.g., when the CN 724 is an EPC) , the interface 722 may be an X2 interface. The X2 interface may be defined between two or more network devices of a RAN (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 700 is an NR system (e.g., when CN 724 is a 5GC) , the interface 722 may be an Xn interface. The Xn interface is defined between two or more network devices of a RAN (e.g., two or more gNBs and the like) that connect to the 5GC, between a base station 712 (e.g., a gNB) connecting to the 5GC and an eNB, and / or between two eNBs connecting to the 5GC (e.g., CN 724) .
[0081] The RAN 706 is shown to be communicatively coupled to the CN 724. The CN 724 may comprise one or more network elements 726, which are configured to offer various data and telecommunications services to customers / subscribers (e.g., users of UE 702 and UE 704) who are connected to the CN 724 via the RAN 706. The components of the CN 724 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) .
[0082] In embodiments, the CN 724 may be an EPC, and the RAN 706 may be connected with the CN 724 via an S1 interface 728. In embodiments, the S1 interface 728 may be split into two parts, an S1 user plane (S1-U) interface, which carries traffic data between the base station 712 or base station 714 and a serving gateway (S-GW) , and the S1-MME interface, which is a signaling interface between the base station 712 or base station 714 and mobility management entities (MMEs) .
[0083] In embodiments, the CN 724 may be a 5GC, and the RAN 706 may be connected with the CN 724 via an NG interface 728. In embodiments, the NG interface 728 may be split into two parts, an NG user plane (NG-U) interface, which carries traffic data between the base station 712 or base station 714 and a user plane function (UPF) , and the S1 control plane (NG-C) interface, which is a signaling interface between the base station 712 or base station 714 and access and mobility management functions (AMFs) .
[0084] Generally, an application server 730 may be an element offering applications that use internet protocol (IP) bearer resources with the CN 724 (e.g., packet switched data services) . The application server 730 can also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc. ) for the UE 702 and UE 704 via the CN 724. The application server 730 may communicate with the CN 724 through an IP communications interface 732.
[0085] FIG. 8 illustrates an example system 800 for performing signaling 838 between a wireless device 802 and a network device 820, according to embodiments described herein. The system 800 may be a portion of a wireless communication system as herein described. The wireless device 802 may be, for example, a UE of a wireless communication system. The network device 820 may be, for example, a base station (e.g., an eNB or a gNB) or a radio head of a wireless communication system.
[0086] The wireless device 802 may include one or more processor (s) 804. The processor (s) 804 may execute instructions such that various operations of the wireless device 802 are performed, as described herein. The processor (s) 804 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.
[0087] The wireless device 802 may include a memory 806. The memory 806 may be a non-transitory computer-readable storage medium that stores instructions 808 (which may include, for example, the instructions being executed by the processor (s) 804) . The instructions 808 may also be referred to as program code or a computer program. The memory 806 may also store data used by, and results computed by, the processor (s) 804.
[0088] The wireless device 802 may include one or more transceiver (s) 810 (also collectively referred to as a transceiver 810) that may include radio frequency (RF) transmitter and / or receiver circuitry that use the antenna (s) 812 of the wireless device 802 to facilitate signaling (e.g., the signaling 838) to and / or from the wireless device 802 with other devices (e.g., the network device 820) according to corresponding RATs.
[0089] The wireless device 802 may include one or more antenna (s) 812 (e.g., one, two, four, eight, or more; also referred to herein as antenna elements) . For embodiments with multiple antenna (s) 812, the wireless device 802 may leverage the spatial diversity of such multiple antenna (s) 812 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, 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 802 may be accomplished according to precoding (or digital beamforming) that is applied at the wireless device 802 that multiplexes the data streams across the antenna (s) 812 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) . Some 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) .
[0090] In some embodiments having multiple antennas, the wireless device 802 may implement analog beamforming techniques, whereby phases of the signals sent by the antenna (s) 812 are relatively adjusted such that the (joint) transmission of the antenna (s) 812 can be directed (this is sometimes referred to as beam steering) .
[0091] The wireless device 802 may include one or more interface (s) 814. The interface (s) 814 may be used to provide input to or output from the wireless device 802. For example, a wireless device 802 that is a UE may include interface (s) 814 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) 810 / antenna (s) 812 already described) that allow for communication between the UE and other devices and may operate according to known protocols (e.g., and the like) .
[0092] The wireless device 802 may include CA / DC management module (s) 816. The CA / DC management module (s) 816 may be implemented via hardware, software, or combinations thereof. For example, the CA / DC management module (s) 816 may be implemented as a processor, circuit, and / or instructions 808 stored in the memory 806 and executed by the processor (s) 804. In some examples, the CA / DC management module (s) 816 may be integrated within the processor (s) 804 and / or the transceiver (s) 810. For example, the CA / DC management module (s) 816 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) 804 or the transceiver (s) 810.
[0093] The CA / DC management module (s) 816 may be used for various aspects of the present disclosure, for example, aspects of FIGs. 1A-6, from a wireless device or UE perspective. The CA / DC management module (s) 816 may be configured to, for example, determine a CSSF value and / or determine which SSB and CSI-RS based L3 measurements to perform.
[0094] The network device 820 may include one or more processor (s) 822. The processor (s) 822 may execute instructions such that various operations of the network device 820 are performed, as described herein. The processor (s) 822 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.
[0095] The network device 820 may include a memory 824. The memory 824 may be a non-transitory computer-readable storage medium that stores instructions 826 (which may include, for example, the instructions being executed by the processor (s) 822) . The instructions 826 may also be referred to as program code or a computer program. The memory 824 may also store data used by, and results computed by, the processor (s) 822.
[0096] The network device 820 may include one or more transceiver (s) 828 (also collectively referred to as a transceiver 828) that may include RF transmitter and / or receiver circuitry that use the antenna (s) 830 of the network device 820 to facilitate signaling (e.g., the signaling 838) to and / or from the network device 820 with other devices (e.g., the wireless device 802) according to corresponding RATs.
[0097] The network device 820 may include one or more antenna (s) 830 (e.g., one, two, four, or more; also referred to herein as antenna elements) . In embodiments having multiple antenna (s) 830, the network device 820 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc., as has been described.
[0098] The network device 820 may include one or more interface (s) 832. The interface (s) 832 may be used to provide input to or output from the network device 820. For example, a network device 820 of a RAN (e.g., a base station, a radio head, etc. ) may include interface (s) 832 made up of transmitters, receivers, and other circuitry (e.g., other than the transceiver (s) 828 / antenna (s) 830 already described) that enables the network device 820 to communicate with other equipment in a network, and / or that enables the network device 820 to communicate with external networks, computers, databases, and the like for purposes of operations, administration, and maintenance of the network device 820 or other equipment operably connected thereto.
[0099] The network device 820 may include one or more CA / DC management module (s) 834. The CA / DC management module (s) 834 may be implemented via hardware, software, or combinations thereof. For example, the CA / DC management module (s) 834 may be implemented as a processor, circuit, and / or instructions 826 stored in the memory 824 and executed by the processor (s) 822. In some examples, the CA / DC management module (s) 834 may be integrated within the processor (s) 822 and / or the transceiver (s) 828. For example, the CA / DC management module (s) 834 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) 822 or the transceiver (s) 828.
[0100] The CA / DC management module (s) 834 may be used for various aspects of the present disclosure, for example, aspects of FIGs. 1A-6, from a network device perspective.
[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 (or 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, network device, 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 described. 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] The systems described herein pertain to specific embodiments but are provided as examples. 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 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 baseband processor comprising a memory and configured to:determine a number of secondary serving cells configured for a user equipment (UE) , each secondary serving cell in the number of secondary serving cells having a respective target serving component carrier (CC) , the respective target serving CC having,both a synchronization signal block (SSB) based Layer 3 (L3) measurement and a channel state information reference signal (CSI-RS) based. L3 measurement configured on the respective target serving CC, and an associated SSB for the CSI-RS based L3 measurement configured on a different serving CC than the respective target serving CC; oronly the CSI-RS based L3 measurement configured on the respective target serving CC, and the associated SSB for the CSI-RS based L3 measurement configured on a different serving CC than the respective target serving CC; orthe CSI-RS based L3 measurement configured on the respective target serving CC, and the respective target CC being SSB-less; anddetermine, based at least in part on the number of secondary serving cells, a carrier-specific scaling factor (CSSF) value for a measurement object outside a measurement gap.2.The baseband processor of claim 1, wherein the number of secondary serving cells is a second number of secondary serving cells, the baseband processor further configured to:determine a first number of secondary serving cells configured for the UE, each secondary serving cell in the first number of secondary serving cells having a respective first target serving CC, the respective first target serving CC having,both a first SSB based L3 measurement and a first CSI-RS based L3 measurement configured on the respective first target serving CC, and an associated first SSB for the first CSI-RS based L3 measurement configured on the respective first target serving CC; oronly the first CSI-RS based L3 measurement configured on the respective first target serving CC, and the associated first SSB for the first CSI-RS based L3 measurement configured on the respective first target serving CC; wherein,the CSSF value for the measurement object outside the measurement gap is further determined using the first number of secondary serving cells.3.The baseband processor of claim 2, wherein the CSSF value for the measurement object outside the measurement gap is determined based at least in part on a first factor equal to two times the first number of secondary serving cells and a second factor equal to the second number of secondary serving cells.4.The baseband processor of claim 3, wherein only one searcher is available to perform measurements for the first number of secondary serving cells and the second number of secondary serving cells.5.The baseband processor of claim 1, wherein a factor NSCC_CSIRS_FR2_NCM of the CSSF value is not incremented by one for any of the secondary serving cells in the determined number of secondary serving cells configured for the UE.6.The baseband processor of claim 1, further configured to:determine a secondary serving cell configured for the UE has a respective third target serving CC, the respective third target serving CC having,both a third SSB based L3 measurement and a third CSI-RS based L3 measurement configured on the respective third target serving cell, and a third associated SSB for the third CSI-RS based L3 measurement configured on the respective third target serving CC; oronly the third CSI-RS based L3 measurement configured on the respective third target serving CC, and the third associated SSB for the third CSI-RS based L3 measurement configured on the respective third target serving CC;determine a fourth SSB, on a different CC than the respective third target serving CC, represents the third associated SSB; andincrement the CSSF value by only one for the secondary serving cell configured for the UE and having the respective third target serving CC.7.The baseband processor of claim 6, further configured to only measure one of the third associated SSB or the fourth SSB before performing the third CSI-RS based L3 measurement.8.The baseband processor of claim 6, further configured to measure the fourth SSB instead of the third associated SSB before performing the third CSI-RS based L3 measurement.9.The baseband processor of claim 6, wherein the different CC than the respective third target serving CC is:an intra-band contiguous CC with respect to the respective third target serving CC; oran intra-band non-contiguous CC with respect to the respective third target serving CC.10.The baseband processor of claim 6, wherein the different CC than the respective third target serving CC is an intra-band adjacent CC with respect to the respective third target serving CC.11.The baseband processor of claim 6, further comprising receiving an indication of the fourth SSB from a network device.12.The baseband processor of claim 6, wherein a factor NSCC_CSIRS_FR2_NCM of the CSSF value is not incremented by one for the secondary serving cell configured for the UE and having the respective third target CC.13.A method of wireless communication at a user equipment (UE) , comprising:determining a first channel state information reference signal (CSI-RS) based Layer 3 (L3) measurement is configured on a first target serving component carrier (CC) of the UE;determining a second CSI-RS based L3 measurement is configured on a second target serving CC of the UE;determining the first target serving CC and the second target serving CC are intra-band CCs or inter-band adjacent CCs;incrementing a factor of a carrier-specific scaling factor (CSSF) value for a measurement object outside a measurement gap, by no more than one, for the combination of the first CSI-RS based L3 measurement and the second CSI-RS based L3 measurement; andcausing no more than one of the first CSI-RS based L3 measurement and the second CSI-RS based measurement to be performed by the UE.14.The method of claim 13, wherein the factor of the CSSF value is 2*NSCC_CSIRS and is incremented by one.15.The method of claim 13, wherein the factor of the CSSF value is NSCC_CSIRS_FR2_NCM and is not incremented.16.The method of claim 13, further comprising:determining a third CSI-RS based L3 measurement is configured on a third target serving CC of the UE;determining the first target serving CC, the second target serving CC, and the third target serving CC are intra-band CCs or inter-band adjacent CCs;incrementing a factor of a CSSF value by no more than one for the combination of the first CSI-RS based L3 measurement, the second CSI-RS based L3 measurement, and the third CSI-RS based L3 measurement; andcausing no more than one of the first CSI-RS based L3 measurement, the second CSI-RS based measurement, or the third CSI-RS based L3 measurement to be performed by the UE.17.A user equipment (UE) , comprising:a processor; andmemory, wherein the processor is configured to execute instructions stored in the memory and cause the UE to:receive, from a network device, a scaling factor;apply the scaling factor to at least one of a measurement resource availability for synchronization signal block (SSB) based Layer 3 (L3) measurements or a searcher resource availability for channel state information reference signal (CSI-RS) based L3 measurements, the application of the scaling factor altering a relationship between,an availability of the measurement resource or the searcher resource for SSB based L3 measurements; andan availability of the measurement resource or the searcher resource for CSI-RS based L3 measurements.18.The UE of claim 17, wherein application of the scaling factor increases the availability of the measurement resource or the searcher resource for SSB based L3 measurements relative to the availability of the measurement resource or the searcher resource for CSI-RS based L3 measurements.19.The UE of claim 17, wherein the scaling factor is applied to a factor of a carrier-specific scaling factor (CSSF) value for a measurement object outside a measurement gap.20.The UE of claim 19, wherein the factor of the CSSF value is one of NSCC_CSIRS or NSCC_CSIRS_FR2_NCM.
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