User equipment initiated beam management procedure
The UE initiated beam management procedure addresses the challenge of slow beam updates in high-speed scenarios by allowing the UE to decode and report reference signal measurements, thereby enhancing throughput performance through dynamic beam management.
Patent Information
- Application Number
- PCT/CN2023/135046
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-29
- Publication Date
- 2025-06-05
AI Technical Summary
Existing beam management procedures in cellular networks, particularly in high-speed user equipment scenarios, fail to provide fast beam updates, leading to throughput performance degradation.
A user equipment (UE) initiated beam management procedure is implemented, where the UE decodes configuration information for reference signal (RS) resource sets, performs measurements, and reports results to the base station, enabling dynamic beam updates.
This solution allows for timely and efficient beam updates, improving throughput performance in high-speed UE scenarios by enabling the UE to proactively manage beam reporting based on measured signal strengths.
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Figure CN2023135046_05062025_PF_FP_ABST
Abstract
Description
User Equipment Initiated Beam Management ProcedureTechnical Field
[0001] The present disclosure generally relates to wireless communication, and in particular, to user equipment initiated beam management procedure.Background
[0002] Cellular networks (e.g., 5G New Radio (NR, 6G, etc. ) are continuously evolving and add various features and functionality to improve operations on both the user side and the network side. For example, new mobile services that require low-latency and high reliability performance (e.g., URLLC) are emerging. The evolution of 5G New Radio (NR) needs to continuously enhance the mobility robustness performance for these challenging scenarios.
[0003] In high-speed user equipment (UE) scenarios such as on a highway or a high-speed train (HST) , the best beam for a UE changes rapidly. The existing beam management procedure cannot provide fast beam updates and may causes a throughput performance degradation in these scenarios.Summary
[0004] Some example embodiments are related to an apparatus of a user equipment (UE) , the apparatus including processing circuitry configured to decode, based on signals received from a base station, configuration information comprising one or more reference signal (RS) resource sets to be measured by the UE, wherein each of the RS resource sets comprises Synchronization Signal Block (SSB) indexes or periodic Channel State Information RS (CSI-RS) indexes, perform RS measurements for an activated RS resource set of the one or more RS resource sets and report measurement results for the activated RS resource set to the base station.
[0005] Other example embodiments are related to an apparatus of a base station, the apparatus comprising including processing circuitry configured to configure transceiver circuitry to transmit, to a user equipment (UE) , configuration information comprising one or more reference signal (RS) resource sets to be measured by the UE, wherein each of the RS resource sets comprises Synchronization Signal Block (SSB) indexes or periodic Channel State Information RS (CSI-RS) indexes and decode, based on signals received from the UE, measurement results for an activated RS resource set of the one or more RS resource sets.Brief Description of the Drawings
[0006] Fig. 1 shows an example network arrangement according to various example embodiments.
[0007] Fig. 2 shows an example UE according to various example embodiments.
[0008] Fig. 3 shows an example base station according to various example embodiments.
[0009] Fig. 4 shows an example of a Medium Access Control Control Element (MAC-CE) for activating resources to trigger UE-initiated beam reporting according to various example embodiments.
[0010] Fig. 5 shows an example fixed size MAC-CE to update the reference signal (RS) index for triggering UE-initiated beam reporting according to various example embodiments.
[0011] Fig. 6 shows an example variable size MAC-CE to update the RS index for triggering UE-initiated beam reporting according to various example embodiments.
[0012] Fig. 7 shows an example of using the MAC-CEs of either Figs. 5 or 6 to update the RS index for triggering UE-initiated beam reporting according to various example embodiments.
[0013] Fig. 8 shows an example of measuring a RS resource set S0 during mobility according to various example embodiments.
[0014] Fig. 9 shows an example signaling diagram for UE-initiated beam reporting according to various example embodiments.
[0015] Fig. 10 shows an example table illustrating a correspondence between an RS resource set S0 and Scheduling Request (SR) Physical Uplink Control Channel (PUCCH) resources according to various example embodiments.
[0016] Fig. 11 shows an example Channel State Information
[0017] (CSI) report having two parts to accommodate a variable size payload according to various example embodiments.
[0018] Fig. 12 shows an example MAC-CE to accommodate a variable size CSI payload according to various example embodiments.Detailed Description
[0019] The example embodiments may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals. The example embodiments relate to UE-initiated beam reporting.
[0020] The example 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 the network. Therefore, the UE as described herein is used to represent any electronic component.
[0021] The example embodiments are also described with reference to a 5G New Radio (NR) network. However, it should be understood that the example embodiments may also be implemented in other types of networks, including but not limited to legacy cellular networks (e.g., Long Term Evolution (LTE) ) , future evolutions of the cellular protocol (e.g., 5G advanced, 6G, etc. ) , or any other type of network.
[0022] The example embodiments provide manners of configuring a UE with an RS resource set where the measurement of the RS resource set may be triggered during mobility. The UE may also be configured with triggers as to when the measurement results of the RS resource set should be reported to the network. In addition, the example embodiments also provide manners of updating the RS resource set to account for mobility of the UE. In some example embodiments, the reporting of the measurement results of the RS resource set triggers the network and UE to perform a full CSI report for mobility. These and other example embodiments are described in greater detail below.
[0023] Fig. 1 shows an example network arrangement 100 according to various example embodiments. The example network arrangement 100 includes a UE 110. Those skilled in the art will understand that the UE 110 may be any type of electronic component that is configured to communicate via a network, e.g., mobile phones, tablet computers, desktop computers, smartphones, phablets, embedded devices, wearables, Internet of Things (IoT) devices (including connected vehicles) , etc. It should also be understood that an actual network arrangement may include any number of UEs being used by any number of users. Thus, the example of one UE 110 is merely provided for illustrative purposes.
[0024] The UE 110 may be configured to communicate with one or more networks. In the example of the network configuration 100, the network with which the UE 110 may wirelessly communicate is a 5G NR radio access network (RAN) 120. However, it should be understood that the UE 110 may also communicate with other types of networks (e.g., 5G cloud RAN, a next generation RAN (NG-RAN) , a legacy cellular network, etc. ) and the UE 110 may also communicate with networks over a wired connection. With regard to the example embodiments, the UE 110 may establish a connection with the 5G NR RAN 120. Therefore, the UE 110 may have a 5G NR chipset to communicate with the NR RAN 120.
[0025] The 5G NR RAN 120 may be portions of a cellular network that may be deployed by a network carrier (e.g., Verizon, AT&T, T-Mobile, etc. ) . The RAN 120 may include cells or base stations that are configured to send and receive traffic from UEs that are equipped with the appropriate cellular chip set. In this example, the 5G NR RAN 120 includes the gNB 120A. However, reference to a gNB is merely provided for illustrative purposes, any appropriate base station or cell may be deployed (e.g., Node Bs, eNodeBs, HeNBs, eNBs, gNBs, gNodeBs, macrocells, microcells, small cells, femtocells, etc. ) .
[0026] Those skilled in the art will understand that any association procedure may be performed for the UE 110 to connect to the 5G NR RAN 120. For example, as discussed above, the 5G NR RAN 120 may be associated with a particular network carrier where the UE 110 and / or the user thereof has a contract and credential information (e.g., stored on a SIM card) . Upon detecting the presence of the 5G NR RAN 120, the UE 110 may transmit the corresponding credential information to associate with the 5G NR RAN 120. More specifically, the UE 110 may associate with a specific cell (e.g., gNB 120A) .
[0027] The network arrangement 100 also includes a cellular core network 130, the Internet 140, an IP Multimedia Subsystem (IMS) 150, and a network services backbone 160. The cellular core network 130 manages the traffic that flows between the cellular network and the Internet 140. The IMS 150 may be generally described as an architecture for delivering multimedia services to the UE 110 using the IP protocol. The IMS 150 may communicate with the cellular core network 130 and the Internet 140 to provide the multimedia services to the UE 110. The network services backbone 160 is in communication either directly or indirectly with the Internet 140 and the cellular core network 130. The network services backbone 160 may be generally described as a set of components (e.g., servers, network storage arrangements, etc. ) that implement a suite of services that may be used to extend the functionalities of the UE 110 in communication with the various networks.
[0028] Fig. 2 shows an example UE 110 according to various example embodiments. The UE 110 will be described with regard to the network arrangement 100 of Fig. 1. The UE 110 may represent any electronic device and may include a processor 205, a memory arrangement 210, a display device 215, an input / output (I / O) device 220, a transceiver 225, and other components 230. The other components 230 may include, for example, an audio input device, an audio output device, a battery that provides a limited power supply, a data acquisition device, ports to electrically connect the UE 110 to other electronic devices, sensors to detect conditions of the UE 110, one or more antenna panels, etc.
[0029] The processor 205 may be configured to execute a plurality of engines for the UE 110. For example, the engines may include a UE-initiated beam reporting engine 235 for performing operations related to the UE 110 initiating a beam report to the network. The operations may include, but are not limited to, receiving a configuration of a RS resource set to be measured during mobility, performing the measurements on the RS resource set and reporting the measurements of RS resource set to the network. These and other example operations are described in further detail below.
[0030] The above referenced engine being an application (e.g., a program) executed by the processor 205 is only example. The functionality associated with the engines may also be represented as a separate incorporated component of the UE 110 or may be a modular component coupled to the UE 110, e.g., an integrated circuit with or without firmware. For example, the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information. The engines may also be embodied as one application or separate applications. In addition, in some UEs, the functionality described for the processor 205 is split among two or more processors such as a baseband processor and an applications processor. The example embodiments may be implemented in any of these or other configurations of a UE.
[0031] The memory arrangement 210 may be a hardware component configured to store data related to operations performed by the UE 110. The display device 215 may be a hardware component configured to show data to a user while the I / O device 220 may be a hardware component that enables the user to enter inputs. The display device 215 and the I / O device 220 may be separate components or integrated together such as a touchscreen.
[0032] The transceiver 225 may be a hardware component configured to establish a connection with the 5G-NR RAN 120. Accordingly, the transceiver 225 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 225 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 205 may be operably coupled to the transceiver 225 and configured to receive from and / or transmit signals to the transceiver 225. The processor 205 may be configured to encode and / or decode signals (e.g., signaling from a base station of a network) for implementing any one of the methods described herein.
[0033] Fig. 3 shows an example base station 300 according to various example embodiments. The base station 300 may represent the gNB 120A or any other access node through which the UE 110 may establish a connection and manage network operations.
[0034] The base station 300 may include a processor 305, a memory arrangement 310, an input / output (I / O) device 315, a transceiver 320, other components 325, and one or more transmission and reception points (TRPs) 330. The other components 325 may include, for example, an audio input device, an audio output device, a battery, a data acquisition device, ports to electrically connect the base station 300 to other electronic devices and / or power sources, etc.
[0035] The processor 305 may be configured to execute a plurality of engines for the base station 300. For example, the engines may include a UE-initiated beam reporting configuration engine 335 for performing operations related to configuring a UE to initiate beam reporting to the base station 300. The operations may include, but are not limited to, configuring a UE with a RS resource set to be measured during mobility, receiving measurements of RS resource set and initiating a full CSI report by the UE to the network. These and other example operations are described in further detail below.
[0036] The above referenced engine being an application (e.g., a program) executed by the processor 305 is only example. The functionality associated with the engines may also be represented as a separate incorporated component of the base station 300 or may be a modular component coupled to the base station 300, e.g., an integrated circuit with or without firmware. For example, the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information. The engines may also be embodied as one application or separate applications. In addition, in some base stations, the functionality described for the processor 305 is split among two or more processors such as a baseband processor and an applications processor. The example embodiments may be implemented in any of these or other configurations of a base station.
[0037] The memory arrangement 310 may be a hardware component configured to store data related to operations performed by the base station 300. The I / O device 315 may be a hardware component or ports that enable a user to interact with the base station 300.
[0038] The transceiver 320 may be a hardware component configured to exchange data with the UE 110 and any other UE in the network arrangement 100. The transceiver 320 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . Therefore, the transceiver 320 may include one or more components (e.g., radios) to enable the data exchange with the various networks and UEs. The transceiver 320 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 305 may be operably coupled to the transceiver 320 and configured to receive from and / or transmit signals to the transceiver 320. The processor 305 may be configured to encode and / or decode signals (e.g., signaling from a UE) for implementing any one of the methods described herein.
[0039] As stated above, the example embodiments are related to UE-initiated beam reporting. To initiate the beam reporting, the UE may be configured with a RS resource set S0 of Synchronization Signal Block (SSB) indexes or periodic Channel State Information Reference Signal (CSI-RS) resources to determine whether to trigger the UE-initiated beam reporting procedure. The following describes various manners of configuring the UE with one or more RS resource sets S0 of SSB indexes or CSI-RS resources and the various manners of activating the RS resource sets S0.
[0040] In some example embodiments a two-step signaling process may be used. In a first step, the UE 110 may be initially configured with a list of RS resource set S0 using Radio Resource Control (RRC) signaling. The maximum number of RS resource sets (S0) in the list may be subj ect to UE capability. In a second step, the S0 that is activated may be updated by a Downlink Control Information (DCI) format field or Medium Access Control Control Element (MAC-CE) signaling. This activation by DCI or MAC-CE may be performed in various manners, examples of which will be described in greater detail below.
[0041] Fig. 4 shows an example of a Medium Access Control Control Element (MAC-CE) 400 for activating resources to trigger UE-initiated beam reporting according to various example embodiments. The MAC-CE 400 may be used to activate or deactivate the RS resource set S0. The MAC-CE 400 may be identified by a dedicated logical channel identification (LCID) and may have a fixed size. The fixed size may be based on any number of factors including a number of RS resource sets S0, a number of neighbor cells, etc.
[0042] The MAC-CE 400 includes a candidate cell identification (ID) field 410, a bandwidth part (BWP) ID field 420 and a Set ID field 430. The candidate cell ID field 410 may be used to indicate the logical ID of a cell. For example, the value ‘0’ may represent the serving cell. For non-serving cells, RRC signaling may be used to configure logic ID The BWP ID field 420 may indicate the ID of the BWP to which the MAC-CE applies. The Set ID field 430 may indicate the identity of the RS resource set S0 that is to be activated / deactivated.
[0043] To provide a specific example, it may be considered that the fixed size of the MAC-CE 400 is 8 bits with each of the fields having the following sizes, the candidate cell ID field 410 is 3 bits, the BWP ID field 420 is 2 bits and the Set ID field 430 is 3 bits. This would mean that in this example, eight (8) sets of S0 may be configured by RRC signaling, e.g., the 3 bit size of the Set ID field 430 may identify any one of the eight (8) RS resource sets of S0 to be activated / deactivated. In addition, in this example, seven neighbor cells may be configured by RRC signaling, e.g., the 3 bit size of the candidate cell ID field 410 may identify the serving cell (value = 0) or any one of the seven neighbor cells. It should be understood that in this example, there is no requirement that eight (8) RS resource sets of S0 or seven (7) neighbor cells be configured, that is j ust an example of the maximum numbers based on the example fixed size MAC-CE 400. In addition, as stated above, other sizes of the MAC-CE 400 or other distributions of the fields within the MAC-CE 400 may be used.
[0044] In another example of activating / deactivating a set S0, a new field may be added into a non-fallback DCI, e.g., DCI format 1_1 / 1_2 / 0_1 / 0_2, to indicate the activated ‘Set ID’ value. Again, in this example, the RS resource sets S0 were signaled to the UE 110 using by RRC signaling in the first step and the non-fallback DCI is used to signal the UE to activate / deactivate one of the RS resource sets S0 in the second step.
[0045] In the above examples, the activation / deactivation of one of the sets S0 is explicit, e.g., via MAC-CE or non-fallback DCI signaling specifically identifying one of the RS resource sets S0. In a further example, the activation / deactivation may be implicitly signaled to the UE 110. For example, when the UE 110 receives a DCI format 1_1 / 1_2 providing a new indicated Transmission Configuration Indicator (TCI) state, the UE 110 may assume the RS resource set S0 that contains the quasi co-located (QCL) source reference signal (RS) of the new indicated TCI state is activated. Thus, the receipt of the new TCI state is an implicit activation of a RS resource set S0.
[0046] In other example embodiments, a new MAC-CE may be designed to explicitly update the RS index for triggering UE-initiated beam reporting. Similar to the example provided above, the new MAC-CE may include a candidate cell ID field that indicates the logical ID of a cell and a BWP ID field that indicates the ID of the BWP to which the MAC-CE applies. In some examples, the new MAC-CE has a fixed size and in other example, the new MAC-CE may have a variable size. Each of these examples will be described in greater detail below.
[0047] Fig. 5 shows an example fixed size MAC-CE 500 to update the RS index for triggering UE-initiated beam reporting according to various example embodiments. The MAC-CE 500 includes the candidate cell ID field 510 and the BWP ID field 520 as described above. The fields that are designated with an ‘R’ are reserved fields that may be used for future extensions.
[0048] The MAC-CE 500 also includes RS ID fields, e.g., RS ID #1 through RS ID #N. These fields indicate the RS ID used for measurement. The MAC-CE 500 has a fixed size as shown in Fig. 5 and includes ’N’ SSB or CSI-RS indexes. ’N’ may be configured by RRC signaling. In this example, each ‘N’ may be an octet. Thus, in the example of Fig. 5, there are five (5) octets shown, e.g., the first octet includes the candidate cell ID field 510 and the BWP ID field 520 and the second through fifth octets include the ‘N’ RS fields.
[0049] Fig. 6 shows an example variable size MAC-CE 600 to update the RS index for triggering UE-initiated beam reporting according to various example embodiments. The MAC-CE 600 includes the candidate cell ID field 610 and the BWP ID field 620 as described above. The fields that are designated with an ‘R’ are reserved fields that may be used for future extensions.
[0050] The MAC-CE 600 also includes RS ID fields, e.g., RS ID #1 through RS ID #K. These fields indicate the RS ID used for measurement. In contrast to the MAC-CE 500, the MAC-CE 600 may have a variable size as shown in Fig. 6 and includes ’K’ SSB or CSI-RS indexes. Again, in this example, each ‘K’ may be an octet. Thus, in the example of Fig. 6, there are five (5) octets shown, e.g., the first octet includes the candidate cell ID field 610 and the BWP ID field 620 and the second through fifth octets include the ‘K’ RS fields.
[0051] The MAC-CE 600 also includes Ui fields 630-660. The Ui fields 630-660 may indicate whether the RS identified by the index ‘i’ in the previous set S0 is updated by the MAC-CE 600. A value ‘0’ is in the Ui field may indicate that the previous set S0 is not updated and a value ‘1’ may indicate that the previous set S0 is updated. The number of Ui bits may be determined based on the recent RS set S0 before receiving this MAC-CE 600, e.g., the use of four (4) Ui fields 630-660 is only an example.
[0052] To provide an example of the use of the Ui fields, the following may be considered. The previous RS set S0 may include four RS IDs, RS ID #1 –RS ID#4. The MAC-CE 600 may thus include the four Ui fields 630-660 that correspond to the RS indexes as follows: U0 630: RS ID #1; U1 640: RS ID #2; U2 650: RS ID #3; and U3 660: RS ID #4. It may further be considered that the values of the four Ui fields 630-660 are {0, 0, 1, 1} . Thus, in this example, this signals the UE 110 that the RS IDs from the previous RS resource set S0 are affected as follows, RS ID #1 and RS ID #2 are not changed, while RS ID #3 and RS ID #4 are changed by the current MAC-CE 600.
[0053] In addition to the above, when signaling the RS indexes using the MAC-CE 500 or the MAC-CE 600, the RS indexes from the previous set may be kept or discarded as follows. In some examples, the RS indexes from the previous RS resource set S0 that are not impacted by receiving the MAC-CE may be kept in the new RS resource set S0. In other examples, the RS indexes from the previous RS resource set S0 that are not impacted by receiving the MAC-CE may be removed and are not included in the new RS resource set S0. Whether the RS indexes from the previous RS resource set S0 that are not impacted are kept or discarded in the new RS resource set S0, may be configured by RRC signaling or hard-encoded in standards, e.g., the 3GPP Technical Specifications.
[0054] Fig. 7 shows an example of using the MAC-CEs of either Figs. 5 or 6 to update the RS index for triggering UE-initiated beam reporting according to various example embodiments. In the example of Fig. 7, it may be considered that the UE 110 is moving along the path 701 and is in the locations shown at time t0 and t1. It may also be considered that the UE 110 is configured with the RS resource set S0 including RS #1, RS#2, RS#3, RS #4 at the time t0. This configuration may be performed using either the MAC-CE 500 or the MAC-CE 600 described above.
[0055] As the UE 110 moves along the path 701, at time t1 the UE 110 is at the location shown in Fig. 7 and the RS resource set S0 may need to be updated. As shown in this example, the updating may include the RS resource set S0 being updated to include RS#3, RS #4, RS #5, RS#6. As stated above, this updating may be performed using either the MAC-CE 500 or the MAC-CE 600.
[0056] When using the MAC-CE 500, 5 octets may be transmitted. For example, the first octet includes the candidate cell ID field 510 and the BWP ID field 520. The second through fifth octets include the ‘N’ RS fields, e.g., RS#3, RS #4, RS #5, RS#6.
[0057] When using the MAC-CE 600, 3 octets may be transmitted. For example, the first octet includes the candidate cell ID field 610 and the BWP ID field 620. The first octet also includes the Ui fields as follows: {U3, U2, U1, U0} = {0, 0, 1, 1} . As described above, this means that the RS #1 and RS #2 are updated (e.g., value = 1) while the RS #3 and RS #4 are not updated (e.g., value = 0) . Thus, in this example, since the RS #3 and RS #4 are not updated, they remain in the new RS resource set S0. The second and third octets of the MAC-CE 600 include the information for the RS #5 and RS #6.
[0058] Thus, in either case, at time t1 the UE 110 has been updated to include an RS resource set S0 of RS#3, RS #4, RS #5, RS#6.
[0059] The above examples described the manner in which the UE 110 may be configured with the RS resource sets S0 for UE-initiated beam reporting. The following will describe the measurements that are performed by the UE 110 for the UE-initiated beam reporting.
[0060] The candidate beam measurements may be configured for reference signal received power (RSRP) measurements, reference signal received quality (RSRQ) measurements or signal-to-interference noise ratio (SINR) measurements to trigger the beam reporting. In the following examples it may be considered that Layer 1 RSRP (L1-RSRP) measurements are used to trigger the beam reporting but other measurements may be used. Furthermore, the network may also configure the UE 110 to apply layer-3 filtering and filtered results may be used to evaluate criteria for triggering a CSI report. The filter coefficients may be provided using RRC signaling.
[0061] In some examples, the UE 110 may not continuously perform the measurements to save power. To minimize power consumption, the UE 110 may perform the measurements on the resources in the set S0 when the measured L1-RSRP of a current beam is lower than a RSRP-threshold. The RSRP-threshold may be configured by RRC signaling or hard coded into standards.
[0062] There may be various events that trigger the UE-initiated reporting. In one example, when the measurement result of the highest L1-RSRP of the RS resource set S0 is greater than a predetermined threshold (e.g., 3 dB) than that of the QCL-source RS associated with the downlink (DL) active beam, this may trigger the UE-initiated reporting.
[0063] In another example, when the L1-RSRP of the QCL-source RS associated with the DL active beam goes below a first predetermined threshold and the highest L1-RSRP of the RS resource set S0 is greater than a second threshold, this may trigger the UE-initiated reporting. The first predetermined threshold may be the same as the predetermined threshold that triggers the UE 110 to start performing the measurements or may be a different threshold that it either higher or lower than the predetermined threshold that triggers the UE 110 to start performing the measurements.
[0064] Fig. 8 shows an example of measuring a RS resource set S0 during mobility according to various example embodiments. In the example of Fig. 8, it may be considered that the UE 110 is moving along the path 801 and is in the locations shown at time t0 and t1. It may also be considered that the UE 110 is configured with the RS resource set S0 including RS #1 and RS#2 and an RSRP threshold, e.g., L1-RSRP of a current beam.
[0065] In this example, it may be considered that the UE 110 does not perform any measurements until the UE 110 reaches the location shown at time t0. As described above, the UE 110 begins performing the measurements on the RS resource set S0 when an RSRP threshold (e.g., L1-RSRP) of a current serving beam is lower than the RSRP threshold configured for the UE 110. For example, when the RSRP is higher than the RSRP threshold, the current beam is of a sufficient quality that there is no need for the UE 110 to use power to measure the RS resource set S0. Thus, in this example, it may be considered that the UE 110 starts performing the measurements on the RS resource set S0 at time t0.
[0066] The UE 110 will perform the measurements on the RS resource set S0 and determine if any of the triggers are satisfied to initiate the beam reporting to the network. As described above, one example of the trigger may include the highest L1-RSRP of the RS resource set S0 is greater than a predetermined threshold (e.g., 3 dB) than that of the QCL-source RS associated with the DL active beam. For example, when the UE 110 begins measurements on the RS resource set S0 at time t0, the trigger may not be satisfied. However, the UE 110 will continue to perform the measurements and in this example, it may be considered that the trigger is satisfied at time t1. For example, at time t1, the UE 110 may determine that the measurement of the RS resource set S0 (e.g., RS #1 and RS#2) indicates that the L1-RSRP of RS#2 is the highest L1-RSRP measurement for the RS resource set S0. The UE 110 may also determine that the L1-RSRP of RS#2 is more than the predetermined threshold than that of the QCL-source RS associated with the DL active beam. Thus, this will trigger the UE 110 to initiate the beam reporting to the network.
[0067] As described above, another example of the trigger may include the L1-RSRP of the QCL-source RS associated with the DL active beam goes below a first predetermined threshold and the highest L1-RSRP of the RS resource set S0 is greater than a second threshold. For example, when the UE 110 begins measurements on the RS resource set S0 at time t0, the trigger may not be satisfied. However, the UE 110 will continue to perform the measurements and in this example, it may be considered that the trigger is satisfied at time t1. For example, at time t1, the UE 110 may determine that the measurement of the RS resource set S0 (e.g., RS #1 and RS#2) indicates that the L1-RSRP of RS#2 is the highest L1-RSRP measurement for the RS resource set S0 and this L1-RSRP satisfies the second predetermined threshold. The UE 110 may also determine that the L1-RSRP of the active beam goes below the first predetermined threshold. Thus, this will trigger the UE 110 to initiate the beam reporting to the network.
[0068] The following provides examples of manners for the UE 110 to perform the beam reporting to the network, e.g., reporting the measurement results of the RS resource set S0 to the base station 300.
[0069] Fig. 9 shows an example signaling diagram 900 for UE-initiated beam reporting according to various example embodiments. The signaling diagram 900 is for a scheduling request (SR) based measurement report being sent from the UE 110 to the network, e.g., base station 300.
[0070] In 910, the base station 300 configures the UE 110 with the RS resource sets S0, for example, in any of the manners described above. The base station 300 also configures the UE 110 with a set of SR Physical Uplink Control Channel (PUCCH) resources that correspond to the resources in the RS resource sets S0. This configuration of the SR PUCCH resources may be performed using RRC signaling or any other type of signaling between the UEE 110 and the base station.
[0071] Fig. 10 shows an example table 1000 illustrating a correspondence between an RS resource set S0 and SR PUCCH resources according to various example embodiments. In this example, there is a 1: 1 correspondence between each RS index and a SR resource. Thus, in this example, it may be considered that the RS resource set S0 1020 includes four (4) RS resources having indexes, RS index #1, RS index #2, RS index #3 and RS index #4. Therefore, the network configures an SR resource set 1010 that has corresponding SR resources for each of the RS resources, e.g., SR resource #1, SR resource #2, SR resource #3 and SR resource #4. The use of the SR resources will be described in greater detail below.
[0072] In 920, the UE 110 is triggered to perform the beam measurements, performs the beam measurements and, in this example, it may be considered that the UE 110 is further triggered to report the beam measurements to the network. Examples of triggering the measurements, performing the measurements and triggering the reporting were described above and will not be repeated here.
[0073] In this example, it may be considered that the measurement report is triggered for a slot n. In 930, the UE 110 will select the earliest SR resource after slot n that corresponds to the RS index having the highest measurement, e.g., highest L1-RSRP, and transmit the measurement report on that SR resource. For example, referring to Fig. 10, if the UE 110 determined that the highest L1-RSRP measurement for the RS resource set S0 1020 was for RS index #3, the UE 110 would send the measurement report to the base station 300 using the corresponding SR resource #3. Because the base station 300 received the measurement report on the SR resource #3, the base station 300 would understand that the UE 110 determined the measurements for the RS index #3 were the highest measurements for the RS resource set S0 1020 even if there was no identifying information of the RS index #3 in the measurement report.
[0074] In response to receiving the measurement report in 930, in 940, the base station 300 will transmit an aperiodic (AP) CSI-RS resource set S1 for the UE 110 to measure and provide a CSI measurement report to the base station 300. The UE 110 will expect the AP CSI-RS resource set S1 based on the UE 110 transmitting the measurement report in 920. In this example, it may be considered that the measurement report in 920 was transmitted on the SR PUCCH at a slot k, and the UE 110 may expect the CSI-RS resource set S1 at a time slot k + Δ1, where Δ1 is a slot offset. In some examples, the slot offset Δ1 may be signaled to the UE 110, e.g., via RRC, DCI or MAC-CE signaling, or a value may be hard coded into the standards.
[0075] In 950, after performing the measurements on the AP CSI-RS resource set S1, the UE 110 may transmit the CSI report on slot k + Δ1 + Δ2, where the slot offset Δ2 may be signaled to the UE 110, e.g., via RRC, DCI or MAC-CE signaling, or a value may be hard coded into the standards.
[0076] In other example embodiments, the network may configure the UE with Type-1 Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resources for measurement reporting associated with the RS resource set S0, e.g., instead of the SR PUCCH resources described above. For example, referring to Fig. 9, when the UE 110 sends the measurement report for the RS resource set S0 at 920, the UE 110 will use a CG-PUSCH resource rather than a SR-PUCCH resource. Again, the CG-PUSCH resources may be signaled to the UE 110, e.g., via RRC, DCI or MAC-CE signaling.
[0077] As described above, in the first example, because the SR-PUCCH resource directly corresponds to an RS resource index, the UE 110 may not have to include identifying information for the RS resource index when sending the measurement report. The CG-PUSCH resources may not have this 1: 1 correspondence with the RS resources and therefore the measurement report may include identifying information of the RS resources in the measurement report. In some example embodiments, the measurement report may include the RS index only or ‘RS index + L1-RSRP’ using the CG-PUSCH, e.g., the RS index having the highest L1-RSRP from the RS resource set S0.
[0078] In other example embodiments, the measurement report may include ‘M’ RS indexes with the highest L1-RSRP or ‘RS index + L1-RSRP’ for using the CG-PUSCH, where ‘M’ is configured by RRC signaling. These types of measurement reports use more resources (e.g., bits) than the above example measurement report (e.g., RS index only or ‘RS index + L1-RSRP’ ) but may provide the network with more flexibility, e.g., load balancing flexibility for the network to select a sub-optimal beam having a light traffic load.
[0079] There may also be various manners of reporting the CSI report for the AP CSI-RS resource set S1, e.g., the CSI report sent in 950 of Fig. 9. In some example embodiments, the UE 110 may include the ‘L’ RS indexes with the highest L1-RSRP or ‘RS index + L1-RSRP’ for CSI reports using the CG-PUSCH or the PUCCH resource, where ‘L’ is configured by RRC signaling. In these example embodiments, the CSI payload size is fixed. However, there is no guarantee that the reported L1-RSRP is sufficient for the candidate cell to be used for Layer 1 triggered mobility (LTM) operation.
[0080] In other example embodiments, the UE 110 may report K pairs of {RS index, L1-RSRP} based on a condition that the corresponding L1-RSRP exceeds a threshold, e.g., ’absThresh’ . The ‘absThresh’ may be set based on a minimum value (e.g., L1-RSRP) value to satisfy LTM requirements. This ‘absThresh’ value may minimize the CSI-report overhead by only including qualified results but also may guarantee the candidate cell satisfies LTM requirements. In these example embodiments, the CSI report payload size ‘K’ is variable, e.g., depending on the number of CSI measurements that satisfy the ‘absThresh’ value.
[0081] The variable size K of the CSI report may be handled in various manners. In some example embodiments, the measurement report may be split into two parts and transmitted using a CG-PUSCH resource. Fig. 11 shows an example CSI report 1100 having two parts to accommodate a variable size payload according to various example embodiments.
[0082] The Part-1 1110 has a fixed size and may include a field that indicates the value of K, e.g., the number of pairs of {RS index, L1-RSRP} to be reported. The value of K may be determined using X = log2L where L represents the maximum number of RS indexes that are included in a single report.
[0083] The Part-2 1120 has a variable size and includes the K pairs of {RS index, L1-RSRP} . As described above, the K pairs may include those RS indexes whose measurements satisfied the ‘absThresh’ value. In some examples, the ’K -1’ reported beams may use a differential L1-RSRP based reporting with a reference to the largest measured L1-RSRP value which is part of the same L1-RSRP reporting instance.
[0084] In other example embodiments, the measurement report may be transmitted using a new MAC-CE, which includes the Part 1 and Part-2 as described above. Fig. 12 shows an example MAC-CE 1200 to accommodate a variable size CSI payload according to various example embodiments. The MAC-CE 1200 may have a variable size and may be identified by a new LCID.
[0085] The MAC-CE 1200 comprises a first octet that includes the Part 1 1210 which may be similar to the Part 1 1110 described above. The MAC-CE 1200 also includes further octets for reporting the K pairs of {RS index, L1-RSRP} , e.g., similar to the Part 2 1120 described above. As described above, the maximum number of K may be determined based on X = log2L. In this example it may be considered that L = 4, and thus, X = log2L = 2. However, this is only an example and other values of L may be used.
[0086] In further example embodiments, the UE 110 may autonomously activate the TCI-state associated with RS of the highest L1-RSRP for the DL beam refinement without explicit CSI reporting. In these example embodiments, the UE 110 may not perform the operation 950 of Fig. 9.
[0087] Examples
[0088] In a first example, a method performed by a user equipment (UE) , the method comprising decoding, based on signals received from a base station, configuration information comprising one or more reference signal (RS) resource sets to be measured by the UE, wherein each of the RS resource sets comprises Synchronization Signal Block (SSB) indexes or periodic Channel State Information RS (CSI-RS) indexes, performing RS measurements for an activated RS resource set of the one or more RS resource sets and reporting measurement results for the activated RS resource set to the base station.
[0089] In a second example, the method of the first example, wherein the one or more RS resource sets are signaled using Radio Resource Control (RRC) signaling from the base station and, wherein the method further comprises decoding, based on signals received from the base station, an activation signal that activates the activated RS resource set of the one or more RS resource sets.
[0090] In a third example, the method of the second example, wherein the activation signal is received in a Medium Access Control Control Element (MAC-CE) having a fixed size and comprising a candidate cell identification (ID) indicating a logical ID of a candidate cell, a bandwidth part (BWP) ID indicating a BWP to which the MAC-CE applies and a set ID indicating an identity of the activated RS resource set.
[0091] In a fourth example, the method of the second example, wherein the activation signal is received in a non-fallback Downlink Control Information (DCI) comprising a field identifying the activated RS resource set.
[0092] In a fifth example, the method of the second example, wherein the activation signal is received in Downlink Control Information (DCI) comprising a field indicating a Transmission Control Indicator (TCI) state, wherein the UE determines the activated RS resource set is to be activated based on the RS resource set comprising a quasi co-located (QCL) source RS of the TCI-state.
[0093] In a sixth example, the method of the first example, further comprising decoding, based on signals received from the base station, a Medium Access Control Control Element (MAC-CE) comprising information to update the activated RS resource set, wherein the information comprises at least a candidate cell identification (ID) indicating a logical ID of a candidate cell and a bandwidth part (BWP) ID indicating a BWP to which the MAC-CE applies.
[0094] In a seventh example, the method of the sixth example, wherein the MAC-CE has a fixed size and the information further comprises a predetermined number of SSB indexes or CSI-RS indexes, wherein the predetermined number is configured using Radio Resource Control (RRC) signaling from the base station.
[0095] In an eighth example, the method of the sixth example, wherein the MAC-CE has a variable size and the information further comprises an indication of whether the information updates SSB indexes or CSI-RS indexes of the activated RS resource set and SSB indexes or CSI-RS indexes that are to be updated.
[0096] In a ninth example, the method of the eighth example, further comprising determining, based on the indication, to keep the SSB indexes or CSI-RS indexes of the activated RS resource set that are indicated as not being updated by the MAC-CE.
[0097] In a tenth example, the method of the eighth example, further comprising determining, based on the indication, to remove the SSB indexes or CSI-RS indexes from the activated RS resource set that are indicated as not being updated by the MAC-CE.
[0098] In an eleventh example, the method of the first example, further comprising performing measurements of RS associated with an active Transmission Control Indicator (TCI) state, wherein the configuration information further comprises a trigger measurement threshold comprising a value wherein the UE triggers the RS measurements for the activated RS resource set when the measurements of the RS associated with the active TCI state is less than the trigger measurement threshold.
[0099] In a twelfth example, the method of the eleventh example, wherein the trigger measurement threshold is based on reference signal received power (RSRP) measurements, reference signal received quality (RSRQ) measurements or signal-to-interference noise ratio (SINR) measurements.
[0100] In a thirteenth example, the method of the first example, further comprising reporting the measurement results for the activated RS resource set to the base station when a measurement result of one of the RS of the activated RS resource set is greater than a predetermined threshold relative to a measurement result for RS associated with an active Transmission Control Indicator (TCI) state.
[0101] In a fourteenth example, the method of the first example, further comprising reporting the measurement results for the activated RS resource set to the base station when a measurement result for RS associated with an active Transmission Control Indicator (TCI) state is less than a first predetermined threshold and a measurement result of one of the RS of the activated RS resource set is greater than a second predetermined threshold.
[0102] In a fifteenth example, the method of the first example, wherein the configuration information further comprises a set of Scheduling Request (SR) Physical Uplink Control Channel (PUCCH) resources, wherein each SR PUCCH resource corresponds to one of SSB indexes or CSI-RS indexes of the activated RS resource set, wherein the measurement results for the activated RS resource set are sent on a SR PUCCH corresponding to a SSB index or CSI-RS index having a highest value measurement result.
[0103] In a sixteenth example, the method of the first example, wherein the configuration information further comprises Type 1 Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resources, wherein the measurement results for the activated RS resource set are sent on a CG-PUSCH resource.
[0104] In a seventeenth example, the method of the sixteenth example, wherein the measurement results comprise (i) only one of the measured SSB indexes or measured CSI-RS indexes corresponding to a highest value of the measurements, or (ii) one of the measured SSB indexes or measured CSI-RS indexes corresponding to a highest value of the measurements and the highest value of the measurement results.
[0105] In an eighteenth example, the method of the sixteenth example, wherein the measurement results comprise (i) a predetermined number of measured SSB indexes or measured CSI-RS indexes having highest values of the measurement results, or (ii) a predetermined number of measured SSB indexes or measured CSI-RS indexes having highest values of the measurement results and the corresponding highest values of the measurement results.
[0106] In a nineteenth example, the method of the first example, further comprising decoding, based on signals received from the base station, a further configuration comprising a second RS resource set to be measured by the UE, wherein the second RS resource set comprises aperiodic CSI-RS resources configured to be transmitted by the base station at a predetermined time after the measurement results of the RS resource set are transmitted by the UE, measuring the aperiodic CSI-RS resources of the second RS resource set and reporting measurement results for the aperiodic CSI-RS resources of the second RS resource set to the base station at a predetermined slot after the slot of the measured aperiodic CSI-RS resource set.
[0107] In a twentieth example, the method of the nineteenth example, wherein the measurement results for the aperiodic CSI-RS resources comprise (i) a predetermined number of CSI-RS indexes having highest values of the measurement results, or (ii) a predetermined number of CSI-RS indexes having highest values of the measurement results and the corresponding highest values of the measurement results.
[0108] In a twenty first example, the method of the nineteenth example, wherein the measurement results for the aperiodic CSI-RS resources comprise CSI-RS index and measurement value pairs having values that exceed a predetermined threshold.
[0109] In a twenty second example, the method of the twenty first example, wherein a measurement report for the measurement results for the aperiodic CSI-RS resources comprises a first part having a fixed payload size and including a value indicating a total number of the CSI-RS index and measurement value pairs and a second part having a variable size and including one or more pairs, wherein each pair includes a CSI-RS index and a measurement value for the CSI-RS index, wherein the measurement report is transmitted in a Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resource.
[0110] In a twenty third example, the method of the twenty second example, wherein the value indicating a first one of the CSI-RS index and measurement value corresponds to a highest value of the measurement results of the second RS resource set and a value indicating a second one of the CSI-RS index and measurement value is based on a differential between the highest value and a measurement value of the second one of the CSI-RS indexes.
[0111] In a twenty fourth example, the method of the twenty first example, wherein a measurement report for the measurement results for the aperiodic CSI-RS resources is transmitted in a Medium Access Control Control Element (MAC-CE) that comprises a first part having a fixed payload size and including a value indicating a total number of the CSI-RS index and measurement value pairs and a second part having a variable size and including one or more pairs, wherein each pair comprises the CSI-RS index and a measurement value for the CSI-RS index.
[0112] In a twenty fifth example, the method of the first example, further comprising decoding, based on signals received from the base station, a further configuration comprising a second RS resource set to be measured by the UE, wherein the second RS resource set comprises aperiodic CSI-RS resources configured to be transmitted by the base station at a predetermined time after the measurement results of the RS resource set are transmitted by the UE, measuring the aperiodic CSI-RS resources of the second RS resource set and activating a Transmission Control Indicator (TCI) state associated with a CSI-RS index having a highest measurement result.
[0113] In a twenty sixth example, a processor configured to perform any of the methods of the first through twenty fifth examples.
[0114] In a twenty seventh example, a user equipment comprising a transceiver configured to communicate with a base station and a processor communicatively coupled to the transceiver and configured to perform any of the methods of the first through twenty fifth examples.
[0115] In a twenty eighth example, a method performed by a base station comprising configuring transceiver circuitry to transmit, to a user equipment (UE) , configuration information comprising one or more reference signal (RS) resource sets to be measured by the UE, wherein each of the RS resource sets comprises Synchronization Signal Block (SSB) indexes or periodic Channel State Information RS (CSI-RS) indexes, decoding, based on signals received from the UE, measurement results for an activated RS resource set of the one or more RS resource sets.
[0116] In a twenty ninth example, the method of the twenty eighth example, wherein the one or more RS resource sets are signaled using Radio Resource Control (RRC) signaling, the method further comprising configuring transceiver circuitry to transmit an activation signal that activates the activated RS resource set of the one or more RS resource sets.
[0117] In a thirtieth example, the method of the twenty ninth example, wherein the activation signal is transmitted in a Medium Access Control Control Element (MAC-CE) having a fixed size and comprising a candidate cell identification (ID) indicating a logical ID of a candidate cell, a bandwidth part (BWP) ID indicating a BWP to which the MAC-CE applies and a set ID indicating an identity of the activated RS resource set.
[0118] In a thirty first example, the method of the twenty ninth example, wherein the activation signal is transmitted in a non-fallback Downlink Control Information (DCI) comprising a field identifying the activated RS resource set.
[0119] In a thirty second example, the method of the twenty ninth example, wherein the activation signal is transmitted in Downlink Control Information (DCI) comprising a field indicating a Transmission Control Indicator (TCI) state, wherein the UE determines the activated RS resource set is to be activated based on the RS resource set comprising a quasi co-located (QCL) source RS of the TCI-state.
[0120] In a thirty third example, the method of the twenty eighth example, further comprising configuring transceiver circuitry to transmit a Medium Access Control Control Element (MAC-CE) comprising information to update the activated RS resource set, wherein the information comprises at least a candidate cell identification (ID) indicating a logical ID of a candidate cell and a bandwidth part (BWP) ID indicating a BWP to which the MAC-CE applies.
[0121] In a thirty fourth example, the method of the thirty third example, wherein the MAC-CE has a fixed size and the information further comprises a predetermined number of SSB indexes or CSI-RS indexes, wherein the predetermined number is configured using Radio Resource Control (RRC) signaling.
[0122] In a thirty fifth example, the method of the thirty third example, wherein the MAC-CE has a variable size and the information further comprises an indication of whether the information updates SSB indexes or CSI-RS indexes of the activated RS resource set and SSB indexes or CSI-RS indexes that are to be updated.
[0123] In a thirty sixth example, the method of the twenty eighth example, wherein the configuration information further comprises a trigger measurement threshold comprising a value that triggers the UE to perform the RS measurements for the activated RS resource set when the measurements of the RS associated with the active TCI state is less than the trigger measurement threshold.
[0124] In a thirty seventh example, the method of the thirty sixth example, wherein the trigger measurement threshold is based on reference signal received power (RSRP) measurements, reference signal received quality (RSRQ) measurements or signal-to-interference noise ratio (SINR) measurements.
[0125] In a thirty eighth example, the method of the twenty eighth example, wherein the configuration information configures the UE to report the measurement results for the activated RS resource set when a measurement result of one of the RS of the activated RS resource set is greater than a predetermined threshold relative to a measurement result for RS associated with an active Transmission Control Indicator (TCI) state.
[0126] In a thirty ninth example, the method of the twenty eighth example, wherein the configuration information configures the UE to report the measurement results for the activated RS resource set when a measurement result for RS associated with an active Transmission Control Indicator (TCI) state is less than a first predetermined threshold and a measurement result of one of the RS of the activated RS resource set is greater than a second predetermined threshold.
[0127] In a fortieth example, the method of the twenty eighth example, wherein the configuration information further comprises a set of Scheduling Request (SR) Physical Uplink Control Channel (PUCCH) resources, wherein each SR PUCCH resource corresponds to one of SSB indexes or CSI-RS indexes of the activated RS resource set, wherein the measurement results for the activated RS resource set are sent on a SR PUCCH corresponding to a SSB index or CSI-RS index having a highest value measurement result.
[0128] In a forty first example, the method of the twenty eighth example, wherein the configuration information further comprises Type 1 Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resources, wherein the measurement results for the activated RS resource set are sent on a CG-PUSCH resource.
[0129] In a forty second example, the method of the forty first example, wherein the measurement results comprise (i) only one of the measured SSB indexes or measured CSI-RS indexes corresponding to a highest value of the measurements, or (ii) one of the measured SSB indexes or measured CSI-RS indexes corresponding to a highest value of the measurements and the highest value of the measurement results.
[0130] In a forty third example, the method of the forty first example, wherein the measurement results comprise (i) a predetermined number of measured SSB indexes or measured CSI-RS indexes having highest values of the measurement results, or (ii) a predetermined number of measured SSB indexes or measured CSI-RS indexes having highest values of the measurement results and the corresponding highest values of the measurement results.
[0131] In a forty fourth example, the method of the twenty eighth example, further comprising configuring transceiver circuitry to transmit a further configuration comprising a second RS resource set to be measured by the UE, wherein the second RS resource set comprises aperiodic CSI-RS resources configured to be transmitted by the base station at a predetermined time after the measurement results of the RS resource set are transmitted by the UE and decoding, based on signals received from the UE, measurement results for the aperiodic CSI-RS resources of the second RS resource set to the base station at a predetermined slot after the slot of the measured aperiodic CSI-RS resource set.
[0132] In a forty fifth example, the method of the forty fourth example, wherein the measurement results for the aperiodic CSI-RS resources comprise (i) a predetermined number of CSI-RS indexes having highest values of the measurement results, or (ii) a predetermined number of CSI-RS indexes having highest values of the measurement results and the corresponding highest values of the measurement results.
[0133] In a forty sixth example, the method of the forty fourth example, wherein the measurement results for the aperiodic CSI-RS resources comprise CSI-RS index and measurement value pairs having values that exceed a predetermined threshold.
[0134] In a forty seventh example, the method of the forty sixth example, wherein a measurement report for the measurement results for the aperiodic CSI-RS resources comprises a first part having a fixed payload size and including a value indicating a total number of the CSI-RS index and measurement value pairs and a second part having a variable size and including one or more pairs, wherein each pair includes a CSI-RS index and a measurement value for the CSI-RS index, wherein the measurement report is transmitted in a Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resource.
[0135] In a forty eighth example, the method of the forty seventh example, wherein the value indicating a first one of the CSI-RS index and measurement value corresponds to a highest value of the measurement results of the second RS resource set and a value indicating a second one of the CSI-RS index and measurement value is based on a differential between the highest value and a measurement value of the second one of the CSI-RS indexes.
[0136] In a forty ninth example, the method of the forty sixth example, wherein a measurement report for the measurement results for the aperiodic CSI-RS is transmitted in a Medium Access Control Control Element (MAC-CE) that comprises a first part having a fixed payload size and including a value indicating a total number of the CSI-RS index and measurement value pairs and a second part having a variable size and including one or more pairs, wherein each pair comprises the CSI-RS index and a measurement value for the CSI-RS index.
[0137] In a fiftieth example, the method of the twenty eighth example, further comprising configuring transceiver circuitry to transmit a further configuration comprising a second RS resource set to be measured by the UE, wherein the second RS resource set comprises aperiodic CSI-RS resources configured to be transmitted by the base station at a predetermined time after the measurement results of the RS resource set are transmitted by the UE.
[0138] In a fifty first example, a processor configured to perform any of the methods of the twenty eighth through fiftieth examples.
[0139] In a fifty second example, a base station comprising a transceiver configured to communicate with a user equipment and a processor communicatively coupled to the transceiver and configured to perform any of the methods of the twenty eighth through fiftieth examples.
[0140] Those skilled in the art will understand that the above-described example embodiments may be implemented in any suitable software or hardware configuration or combination thereof. An example hardware platform for implementing the example embodiments may include, for example, an Intel x86 based platform with compatible operating system, a Windows OS, a Mac platform and MAC OS, a mobile device having an operating system such as iOS, Android, etc. The example embodiments of the above described method may be embodied as a program containing lines of code stored on a non-transitory computer readable storage medium that, when compiled, may be executed on a processor or microprocessor.
[0141] Although this application described various embodiments each having different features in various combinations, those skilled in the art will understand that any of the features of one embodiment may be combined with the features of the other embodiments in any manner not specifically disclaimed or which is not functionally or logically inconsistent with the operation of the device or the stated functions of the disclosed embodiments.
[0142] 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.
[0143] It will be apparent to those skilled in the art that various modifications may be made in the present disclosure, without departing from the spirit or the scope of the disclosure. Thus, it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalent.
Claims
1.An apparatus of a user equipment (UE) , the apparatus comprising processing circuitry configured to:decode, based on signals received from a base station, configuration information comprising one or more reference signal (RS) resource sets to be measured by the UE, wherein each of the RS resource sets comprises Synchronization Signal Block (SSB) indexes or periodic Channel State Information RS (CSI-RS) indexes;perform RS measurements for an activated RS resource set of the one or more RS resource sets; andreport measurement results for the activated RS resource set to the base station.2.The apparatus of claim 1, wherein the one or more RS resource sets are signaled using Radio Resource Control (RRC) signaling from the base station and, wherein the processing circuitry is further configured to:decode, based on signals received from the base station, an activation signal that activates the activated RS resource set of the one or more RS resource sets.3.The apparatus of claim 2, wherein the activation signal is received in a Medium Access Control Control Element (MAC-CE) having a fixed size and comprising a candidate cell identification (ID) indicating a logical ID of a candidate cell, a bandwidth part (BWP) ID indicating a BWP to which the MAC-CE applies and a set ID indicating an identity of the activated RS resource set.4.The apparatus of claim 2, wherein the activation signal is received in a non-fallback Downlink Control Information (DCI) comprising a field identifying the activated RS resource set.5.The apparatus of claim 2, wherein the activation signal is received in Downlink Control Information (DCI) comprising a field indicating a Transmission Control Indicator (TCI) state, wherein the UE determines the activated RS resource set is to be activated based on the RS resource set comprising a quasi co-located (QCL) source RS of the TCI-state.6.The apparatus of claim 1, wherein the processing circuitry is further configured to:decode, based on signals received from the base station, a Medium Access Control Control Element (MAC-CE) comprising information to update the activated RS resource set, wherein the information comprises at least a candidate cell identification (ID) indicating a logical ID of a candidate cell and a bandwidth part (BWP) ID indicating a BWP to which the MAC-CE applies.7.The apparatus of claim 6, wherein the MAC-CE has a fixed size and the information further comprises a predetermined number of SSB indexes or CSI-RS indexes, wherein the predetermined number is configured using Radio Resource Control (RRC) signaling from the base station.8.The apparatus of claim 6, wherein the MAC-CE has a variable size and the information further comprises an indication of whether the information updates SSB indexes or CSI-RS indexes of the activated RS resource set and SSB indexes or CSI-RS indexes that are to be updated.9.The apparatus of claim 8, wherein the processing circuitry is further configured to:determine, based on the indication, to keep the SSB indexes or CSI-RS indexes of the activated RS resource set that are indicated as not being updated by the MAC-CE.10.The apparatus of claim 8, wherein the processing circuitry is further configured to:determine, based on the indication, to remove the SSB indexes or CSI-RS indexes from the activated RS resource set that are indicated as not being updated by the MAC-CE.11.The apparatus of claim 1, wherein the processing circuitry is further configured to:perform measurements of RS associated with an active Transmission Control Indicator (TCI) state, wherein the configuration information further comprises a trigger measurement threshold comprising a value wherein the UE triggers the RS measurements for the activated RS resource set when the measurements of the RS associated with the active TCI state is less than the trigger measurement threshold.12.The apparatus of claim 1, wherein the processing circuitry is configured to report the measurement results for the activated RS resource set to the base station when a measurement result of one of the RS of the activated RS resource set is greater than a predetermined threshold relative to a measurement result for RS associated with an active Transmission Control Indicator (TCI) state.13.The apparatus of claim 1, wherein the processing circuitry is configured to report the measurement results for the activated RS resource set to the base station when a measurement result for RS associated with an active Transmission Control Indicator (TCI) state is less than a first predetermined threshold and a measurement result of one of the RS of the activated RS resource set is greater than a second predetermined threshold.14.The apparatus of claim 1, wherein the configuration information further comprises a set of Scheduling Request (SR) Physical Uplink Control Channel (PUCCH) resources, wherein each SR PUCCH resource corresponds to one of SSB indexes or CSI-RS indexes of the activated RS resource set, wherein the measurement results for the activated RS resource set are sent on a SR PUCCH corresponding to a SSB index or CSI-RS index having a highest value measurement result.15.The apparatus of claim 1, wherein the configuration information further comprises Type 1 Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resources, wherein the measurement results for the activated RS resource set are sent on a CG-PUSCH resource.16.The apparatus of claim 1, wherein the processing circuitry is further configured to:decode, based on signals received from the base station, a further configuration comprising a second RS resource set to be measured by the UE, wherein the second RS resource set comprises aperiodic CSI-RS resources configured to be transmitted by the base station at a predetermined time after the measurement results of the RS resource set are transmitted by the UE;measure the aperiodic CSI-RS resources of the second RS resource set; andreport measurement results for the aperiodic CSI-RS resources of the second RS resource set to the base station at a predetermined slot after the slot of the measured aperiodic CSI-RS resource set.17.The apparatus of claim 16, wherein the measurement results for the aperiodic CSI-RS resources comprise (i) a predetermined number of CSI-RS indexes having highest values of the measurement results, or (ii) a predetermined number of CSI-RS indexes having highest values of the measurement results and the corresponding highest values of the measurement results.18.The apparatus of claim 16, wherein the measurement results for the aperiodic CSI-RS resources comprise CSI-RS index and measurement value pairs having values that exceed a predetermined threshold.19.The apparatus of claim 18, wherein a measurement report for the measurement results for the aperiodic CSI-RS resources comprises a first part having a fixed payload size and including a value indicating a total number of the CSI-RS index and measurement value pairs and a second part having a variable size and including one or more pairs, wherein each pair includes a CSI-RS index and a measurement value for the CSI-RS index, wherein the measurement report is transmitted in a Configured Grant Physical Uplink Shared Channel (CG-PUSCH) resource.20.The apparatus of claim 18, wherein a measurement report for the measurement results for the aperiodic CSI-RS resources is transmitted in a Medium Access Control Control Element (MAC-CE) that comprises a first part having a fixed payload size and including a value indicating a total number of the CSI-RS index and measurement value pairs and a second part having a variable size and including one or more pairs, wherein each pair comprises the CSI-RS index and a measurement value for the CSI-RS index.
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