Reception mode adaptation for multiple receiver chain capability devices

Abstract

Systems, methods, apparatuses, and computer program products for a multi-receive chain UE. A method may include receiving, from a serving cell, at least one radio resource control configuration or device capability reporting signal associated with at least one multi-receive chain user equipment mode; sending an indication to the serving cell that the at least one multi-receive chain user equipment mode is preferred; and in response to sending the indication that the at least one multi-receive chain user equipment mode is preferred, receiving, from the serving cell, an indication that the at least one preferred multi-receive chain user equipment mode is operating.

Description

Technical Field

[0001] Some example embodiments may generally relate to mobile or wireless communication systems, such as long term evolution (LTE), fifth generation (5G) radio access technology (RAT), new radio (NR) access technology, sixth generation (6G), and / or other communication systems. For example, certain example embodiments may relate to systems and / or methods for multi-receive (Rx) chain UEs. Background Art

[0002] Examples of mobile or wireless communication systems may include: Radio Frequency (RF) 5G RAT, Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), LTE Evolved UTRAN (E-UTRAN), Advanced LTE (LTE-A), LTE-A Pro, NR access technology, and / or MulteFire Alliance. 5G wireless system refers to the next generation (NG) wireless system and network architecture. 5G systems are typically built on 5G NR, but 5G (or NG) networks can also be built on E-UTRA radio. NR is expected to support service categories such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), and massive machine type communications (mMTC). NR is expected to provide extremely broadband, ultra-robust, low-latency connections and large-scale networks to support the Internet of Things (IoT). The next generation radio access network (NG-RAN) represents the RAN for 5G, which can provide wireless access for NR, LTE, and LTE-A. Note that in 5G, a node that provides wireless access functions to user equipment (e.g., similar to a Node B in UTRAN or an evolved Node B (eNB) in LTE) may be referred to as a next-generation Node B (gNB) when built on NR radio, and may be referred to as a next-generation eNB (NG-eNB) when built on E-UTRA radio. Summary of the invention

[0003] According to some example embodiments, a method may include: receiving at least one radio resource control configuration or device capability report signal associated with at least one multiple receive chain user equipment mode from a serving cell. The method may also include: sending an indication that at least one multiple receive chain user equipment mode is preferred to the serving cell. The method may also include: in response to sending the indication that at least one multiple receive chain user equipment mode is preferred, receiving from the serving cell an indication that at least one preferred multiple receive chain user equipment mode is operating.

[0004] According to certain example embodiments, an apparatus may include: means for receiving, from a serving cell, at least one radio resource control configuration or device capability report signal associated with at least one multiple receive chain user equipment mode. The apparatus may also include: means for sending, to the serving cell, an indication that at least one multiple receive chain user equipment mode is preferred. The apparatus may also include: means for receiving, from the serving cell, an indication that at least one preferred multiple receive chain user equipment mode is operating in response to sending the indication that at least one multiple receive chain user equipment mode is preferred.

[0005] According to various example embodiments, a non-transitory computer-readable medium includes program instructions, which, when executed by an apparatus, cause the apparatus to perform at least one method. The method may include: receiving at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode from a serving cell. The method may also include: sending an indication that at least one multi-receive chain user equipment mode is preferred to the serving cell. The method may also include: in response to sending the indication that at least one multi-receive chain user equipment mode is preferred, receiving from the serving cell an indication that at least one preferred multi-receive chain user equipment mode is operating.

[0006] According to some example embodiments, a computer program product may perform a method. The method may include: receiving at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode from a serving cell. The method may also include: sending an indication that at least one multi-receive chain user equipment mode is preferred to the serving cell. The method may also include: in response to sending the indication that at least one multi-receive chain user equipment mode is preferred, receiving from the serving cell an indication that at least one preferred multi-receive chain user equipment mode is operating.

[0007] According to certain example embodiments, an apparatus may include at least one processor and at least one memory storing instructions, which, when executed by the at least one processor, cause the apparatus to at least: receive at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode from a serving cell. The at least one memory and the instructions, when executed by the at least one processor, may also cause the apparatus to at least: send an indication that at least one multi-receive chain user equipment mode is preferred to the serving cell. The at least one memory and the instructions, when executed by the at least one processor, may also cause the apparatus to at least: receive, in response to sending an indication that at least one multi-receive chain user equipment mode is preferred, an indication that at least one preferred multi-receive chain user equipment mode is operating from the serving cell.

[0008] According to various example embodiments, an apparatus may include: a receiving circuit system configured to receive at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode from a serving cell. The apparatus may also include: a transmitting circuit system configured to send an indication that at least one multi-receive chain user equipment mode is preferred to the serving cell. The apparatus may also include: a receiving circuit system configured to receive, in response to sending the indication that at least one multi-receive chain user equipment mode is preferred, an indication that at least one preferred multi-receive chain user equipment mode is operating from the serving cell.

[0009] According to some example embodiments, a method may include: sending to a user equipment at least one radio resource control configuration associated with at least one multi-receiver chain user equipment mode. The method may also include: receiving from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred. The method may also include: in response to receiving the indication that at least one multi-receiver chain user equipment mode is preferred, sending to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating.

[0010] According to certain example embodiments, an apparatus may include means for sending to a user equipment at least one radio resource control configuration associated with at least one multi-receiver chain user equipment mode. The apparatus may also include means for receiving from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred. The apparatus may also include means for sending to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating in response to receiving the indication that at least one multi-receiver chain user equipment mode is preferred.

[0011] According to various example embodiments, a non-transitory computer-readable medium includes program instructions that, when executed by an apparatus, cause the apparatus to perform at least one method. The method may include: sending at least one radio resource control configuration associated with at least one multi-receiver chain user equipment mode to a user equipment. The method may also include: receiving from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred. The method may also include: in response to receiving the indication that at least one multi-receiver chain user equipment mode is preferred, sending to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating.

[0012] According to some example embodiments, a computer program product may perform a method. The method may include: sending at least one radio resource control configuration associated with at least one multi-receiver chain user equipment mode to a user equipment. The method may also include: receiving from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred. The method may also include: in response to receiving the indication that at least one multi-receiver chain user equipment mode is preferred, sending to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating.

[0013] According to certain example embodiments, an apparatus may include: at least one processor and at least one memory storing instructions, which instructions, when executed by the at least one processor, cause the apparatus to at least: send at least one radio resource control configuration associated with at least one multi-receiver chain user equipment mode to a user equipment. The at least one memory and the instructions, when executed by the at least one processor, may also cause the apparatus to at least: receive from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred. The at least one memory and the instructions, when executed by the at least one processor, may also cause the apparatus to at least: in response to receiving an indication that at least one multi-receiver chain user equipment mode is preferred, send to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating.

[0014] According to various example embodiments, an apparatus may include: a transmitting circuit system configured to transmit at least one radio resource control configuration associated with at least one multi-receiver chain user equipment mode to a user equipment. The apparatus may also include: a receiving circuit system configured to receive from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred. The apparatus may also include: a transmitting circuit system configured to transmit to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating in response to receiving the indication that at least one multi-receiver chain user equipment mode is preferred. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For a proper understanding of the example embodiments, reference should be made to the accompanying drawings, in which:

[0016] Figure 1 An example of single Rx chain UE operation is illustrated.

[0017] Figure 2 An example of a multi-Rx chain UE is illustrated.

[0018] Figure 3 Examples of several potential reception modes for a multi-Rx capable UE beam are illustrated.

[0019] Figure 4An example of a signaling diagram is illustrated in accordance with certain example embodiments.

[0020] Figure 5 An example of a signaling diagram showing data transmission during measurement and measurement gaps / scheduling restrictions is illustrated according to some example embodiments.

[0021] Figure 6 An example of a signaling diagram showing data transmission with simultaneous measurements according to various example embodiments is illustrated.

[0022] Figure 7 An example of a signaling diagram showing data transmission and interruption during measurement is illustrated, according to some example embodiments.

[0023] Figure 8 An example of UE-initiated mode adaptation according to some example embodiments is illustrated.

[0024] Fig. 9 An example of an RRC based implementation of a UE triggered mode change according to various example embodiments is illustrated.

[0025] Fig.10 Examples of certain network devices according to some example embodiments are illustrated.

[0026] Fig.11 An example of a 5G network and system architecture is illustrated in accordance with some example embodiments. DETAILED DESCRIPTION

[0027] It is easy to understand that the components of certain example embodiments, as generally described and illustrated in the figures herein, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of some example embodiments of the system, method, apparatus, and computer program product for multi-Rx chain UE is not intended to limit the scope of certain example embodiments, but rather represents selected example embodiments.

[0028] The frequency range (FR) 2 arrays on the UE may be directional; therefore, in order to operate satisfactorily, the UE is embedded with multiple antenna panels. However, the number of antenna panels and Rx chains on the UE may not be mapped 1 to 1. 3GPP includes a requirement for single-chain UEs, where these UEs can only have a single FR2 panel active at a time. This limitation has some disadvantages in neighbor cell measurements, as the UE needs to scan one panel at a time in order to fully understand its environment. This is in Figure 1 As described in , a single-link 4-panel UE may need 4 consecutive bursts for a single sample acquisition. In addition, each Rx spatial setting for L1 or L3 measurement may require 3-5 samples to ensure measurement accuracy.

[0029] Figure 2 FIG. illustrates an example of a possible multi-Rx chain UE implementation, which can improve the performance of the UE and the system, including measurement-related latency. As Figure 2 shown, the UE can be implemented with 4 antenna panels arranged to improve spherical coverage, and 2 Rx chains are used. The two Rx chains shown can be switched between the four panels such that any combination of two panels can be active simultaneously.

[0030] One challenge for traditional FR2 UEs is the measurement latency due to UE Rx scheduling limitations. Traditional FR2 UEs can have Rx limiting conditions to perform a single reception task among L3 measurements (cell search), L1 measurements (beam measurements and management), PDCCH monitoring, PDSCH demodulation, and CSI measurements. Some example embodiments discussed herein can address some of these challenges of FR2 by using multi-Rx chains.

[0031] The network can consider the Rx capabilities of the UE and check the Rx scheduling availability for scheduling specific signal reception tasks from a single cell or multiple cells / TRPs. UE RX scheduling limitations can cause significant delays in performing multiple tasks, including whether the signals of the tasks overlap or are adjacent over time. When the UE receives signals from the gNB that require some of the listed tasks, the traditional UE capabilities can be limited to performing one task at a time.

[0032] SSBs associated with different PCI overlaps can include 2 cases. In the first case, the SSB associated with a cell having a PCI different from the serving cell can be used for L1-RSRP measurement, and the SSB configured for serving cell L1 measurements (i.e., L1-RSRP, L1-SINR, RLM, BFR) can overlap. In the second case, the SSB associated with a cell having a PCI different from the serving cell can be used for L1-RSRP measurement, and the SSB for serving cell L3 measurement (i.e., the SSB in SMTC) can overlap.

[0033] For case 1 in FR2, the RRM requirements can assume that the UE performs L1-RSRP measurement on one cell at a time. For case 2 in FR2, if all SSB measurement occasions of the cell having a PCI are different from the serving cell and the SMTCs completely overlap, the RRM requirements may not be specified. For case 2 in FR2, if all SSB measurement occasions of the cell having a PCI different from the serving cell and the SMTCs partially overlap, i.e., the SSB period of the cell having a different PCI < SMTC period, the RRM requirements are specified, assuming that the UE performs L1 measurement at the SSB occasion of the cell having a PCI different from the serving cell that does not overlap with the SMTC.

[0034] Regarding the explicit difference between FR1 and FR2 UEs, FR1 UEs can perform most of the Rx reception from multiple cells, while FR2 UEs may require the network to allow enough time periods to perform all tasks one by one, and repeatedly send messages or reference signals to schedule the UE to complete the assigned tasks. FR2 UE RX scheduling limitations may be due to RX beam steering limitations. Since FR2 UEs can use a single Rx chain and since analog beamforming can be assumed at FR2, the UE cannot monitor multiple beams simultaneously. Therefore, when the UE performs beam scanning during L1 / L3 measurements, the UE cannot monitor or demodulate the signals from the serving beam for PDCCH and PDSCH.

[0035] Certain example embodiments described herein may have various benefits and / or advantages to overcome the above disadvantages. For example, certain example embodiments may improve power consumption and reduce latency by processing multiple receive and tasks. Power may also be saved by shutting down some or RX chains. Therefore, certain example embodiments discussed below are intended to improve computer-related technologies.

[0036] Some example embodiments discussed below may include various UE processing modes and indications for each Rx chain, where the network may control a UE with multiple Rx chains. As described above, Figure 2 A multi-Rx chain UE in a mobile phone is described, which can implement the same or different tasks across the Rx chains. The UE tasks may include, for example, RRM, demodulation and CSI as L3 measurements (cell search), L1 measurements (beam measurement and management), PDCCH monitoring, PDSCH demodulation and CSI measurements. Various example embodiments may involve 3 operating modes for multi-chain UEs, and a network that controls the activation / deactivation of these modes, each of which is discussed below.

[0037] Figure 4 An example of a signaling diagram is illustrated, which describes a single-chain reception to save power at the UE, or for using an additional Rx chain for multi-USIM purposes. According to some example embodiments, neighboring cells 430 and 440 and serving cell 410 may be similar to NE 1010, and UE 420 may be similar to UE 1020, such as Fig.10 shown.

[0038] At 401 , the serving cell 410 and the UE 420 may exchange RRC configurations associated with any combination of the first mode, the second mode, and the third mode.

[0039] At 402 , in response to receiving the configuration at 401 , UE 420 may indicate to serving cell 410 a preferred mode corresponding to the first mode, the second mode, or the third mode.

[0040] At 403, serving cell 410 may send an indication of an operating mode to UE 420. For example, the operating mode may include switching via network signaling (e.g., RRC, MAC, DCI) and / or UE implementation. In response to the indication at 403, UE 420 may enter a preferred mode; as an example, Figure 4 It is described that the UE 420 enters the first mode.

[0041] At 404, serving cell 410 and UE 420 may exchange data according to the preferred mode. A time period for performing measurements may then begin.

[0042] Figure 5 An example of a signaling diagram is illustrated that describes a pattern of data transmission and measurement gap / scheduling restrictions during measurement. According to certain example embodiments, neighboring cells 540 and 550 and serving cell 520 may be similar to NE 1010, and UE 530 may be similar to UE 1020, such as Fig.10 When this high performance or latency reduction is not required, Figure 5 The modes shown may be suitable for power saving.

[0043] like Figure 3 As shown in (a), UE 530 may not need to perform measurements of neighboring cells 540 and 550, nor need to send data at the same time. Measurement gaps, interruptions, or scheduling restrictions may apply during the measurement. Even for multi-Rx capable UEs, this embodiment may also have advantages when UE 530 does not want to activate all of its Rx, for example to save power, and / or because UE 530 is monitoring other networks in a multi-universal subscriber identity module (MUSIM).

[0044] At 501 , UE 530 may enter and operate in a first mode.

[0045] At 502 , the serving cell 520 may exchange data with a first Rx chain of the UE 530 , and at 503 , the serving cell 520 may exchange data with a second Rx chain of the UE 530 .

[0046] At 504 , the serving cell 520 may exchange data with the first Rx chain of the UE 530 , and at 505 , the serving cell 520 may exchange data with the second Rx chain of the UE 530 .

[0047] At 506, the serving cell 520 may initiate gap / scheduling restrictions.

[0048] At 507 , the neighbor cell 540 may perform SSB measurement on the first Rx chain of the UE 530 , and at 508 , the neighbor cell 550 may perform SSB measurement on the first Rx chain of the UE 530 .

[0049] At 509 , the neighbor cell 540 may perform SSB measurement on the first Rx chain of the UE 530 , and at 510 , the neighbor cell 550 may send the SSB measurement to the first Rx chain of the UE 530 .

[0050] At 511 , the serving cell 520 may stop the gap / scheduling restriction started at 506 .

[0051] At 512 , the serving cell 520 may exchange data with the first Rx chain of the UE 530 , and at 513 , the serving cell 520 may exchange data with the second Rx chain of the UE 530 .

[0052] At 514 , the serving cell 520 may exchange data with the first Rx chain of the UE 530 , and at 515 , the serving cell 520 may exchange data with the second Rx chain of the UE 530 .

[0053] Figure 6 An example of a signaling diagram is illustrated that describes simultaneous measured data transmission without gap / scheduling restrictions. According to certain example embodiments, neighboring cells 640 and 650 and serving cell 620 may be similar to NE 1010, and UE 630 may be similar to UE 1020, such as Fig.10 UE 630 may be able to receive a data signal from serving cell 620, which may at least partially overlap in time with reference signals (eg, SSBs) received from neighboring cells 640 and 650.

[0054] like Figure 3 (b) and Figure 6 As shown, simultaneous data reception and measurement can be expected. This mode can reduce the impact of measurement on user data throughput and delay. Since scheduling restrictions can be avoided or minimized using this mode, the scheduler of the serving cell 620 can have more degrees of freedom and better network efficiency can be achieved. Some embodiments may have the advantage of not requiring Rx scheduling restrictions. By scheduling different resources from multiple cells simultaneously, delays can be reduced.

[0055] In various example embodiments, multi-chain Rx can be used for simultaneous data or reference signal reception from the serving cell 620 or the neighboring cells 640 and 650. Multiple RX chains can be enabled, and each RX chain can perform different tasks in the task list simultaneously. Some Rx chains diverted to a cell can perform one or more tasks, while some Rx chains diverted to another cell can perform other tasks (e.g., L3 measurements (cell search), L1 measurements (beam measurement and management), PDCCH monitoring, PDSCH demodulation, and CSI measurements). In some example embodiments, one Rx chain can be assigned to process the PDSCH from the neighboring cell 640, while another Rx chain can be assigned to process the RRM measurements from the neighboring cell 650.

[0056] At 601 , UE 630 may enter and operate in a second mode.

[0057] At 602 , the serving cell 620 may exchange data with a first Rx chain of a UE 630 , and a second Rx chain of the UE 630 .

[0058] At 603, the serving cell 620 may exchange data with the first Rx chain of the UE 630, while at 604, the UE 630 may perform SSB measurements (e.g., L3 measurements (cell search), L1 measurements (beam measurement and management), PDCCH monitoring, PDSCH demodulation, and CSI measurements) on the second Rx chain of the UE 630, which at least partially overlap with the data exchanged at 603.

[0059] At 605, the serving cell 620 may exchange data with the first Rx chain of the UE 630, while at 606, the UE 630 may perform SSB measurements (e.g., L3 measurements (cell search), L1 measurements (beam measurement and management), PDCCH monitoring, PDSCH demodulation, and CSI measurements) on the second Rx chain of the UE 630, which at least partially overlap with the data exchanged at 605.

[0060] At 607 , the serving cell 620 may exchange data with the first Rx chain of the UE 630 , and the second Rx chain of the UE 630 .

[0061] Figure 7 An example of a signaling diagram is illustrated that describes data transmission and interruption during measurement. According to certain example embodiments, neighboring cells 740 and 750 and serving cell 720 may be similar to NE 1010, and UE 730 may be similar to UE 1020, such as Fig.10 shown.

[0062] In various example embodiments, multi-chain reception can be used, for example, for reduced latency and faster UE Rx processing or high-performance Rx. The network or UE implementation can enable multiple Rx chains, where multiple Rx chains can perform the same tasks (e.g., L3 measurements (cell search), L1 measurements (beam measurement and management), PDCCH monitoring, PDSCH demodulation, and CSI measurements) simultaneously. Specifically, the Rx chain can perform RRM measurements, or both Rx chains can perform PDSCH decoding. Multiple RX chains can be assigned to simultaneously measure L1-RSRP from a cell to reduce beam scanning time. In addition, multiple Rx chains can be assigned to simultaneously measure RRM measurements of L1-RSRP and L3-RSRP using narrow beams and wide beams, respectively. Multiple RX chains can also be assigned to PDSCH / PDCCH from at least one cell to effectively achieve MIMO spatial multiplexing gain. Various example embodiments can provide fast processing or high performance by performing the same tasks on multiple Rx chains. UE 730 can enjoy the benefits of fast beam scanning using multiple RX panels, or higher MIMO layer configuration using multiple RX panels.

[0063] Some example embodiments may have the advantage of fast processing or high performance by performing the same task on multiple Rx chains. The UE 730 may enjoy the benefits of fast beam scanning using multiple RX panels, or higher MIMO layer configuration using multiple RX panels.

[0064] Figure 3 (c) and Figure 7 Describes the use of a UE's ability to receive using multiple receiver chains to perform measurements in multiple beams simultaneously. A beam scanning scaling factor of 8 may be used and the RRM measurements and procedures may be scaled by this factor in accordance with the FR2-1 requirements. When this mode is used, the UE may perform single measurements more quickly, where periodic measurements may be performed more frequently, resulting in more reliable measurements of mobility. These measurements may also be performed with the same period, which means that the number of measurements with interruptions and scheduling constraints will be reduced and better network efficiency may be achieved. Additionally, for some RRM requirements, a larger scaling factor may mean that when the UE completes a measurement it may have been moved in such a way that the measurement is no longer valid. Therefore, reducing the beam scanning scaling factor may make the measurements more robust to mobility.

[0065] At 701 , the UE 730 may enter and operate in a third mode.

[0066] At 702 , the serving cell 720 may simultaneously exchange data with a first Rx chain of the UE 730 and a second Rx chain of the UE 730 .

[0067] At 703, the serving cell 720 may start gap / scheduling restriction.

[0068] At 704, UE 730 may perform measurements (e.g., SSB) from a first direction based on an SSB signal from a neighboring cell 740 using a first Rx chain of UE 730, and at the same time, UE 730 may perform measurements (e.g., SSB) from a second direction based on an SSB signal from a neighboring cell 740 (or another cell) using an SSB signal that at least partially overlaps with a signal using a second Rx chain of UE 730 in 704.

[0069] At 705, UE 730 can utilize the first Rx chain of UE 730 to perform measurements (e.g., SSB) from a first direction based on an SSB signal from a neighboring cell 750, and at the same time, UE 730 can utilize the SSB signal that at least partially overlaps with the signal of the second Rx chain of UE 730 in 705 to perform measurements (e.g., SSB) from a second direction based on an SSB signal from a neighboring cell 750 (or another cell).

[0070] At 706, the serving cell 720 may stop the gap / scheduling restriction.

[0071] At 707 , the serving cell 720 may exchange data with the first Rx chain of the UE 730 and the second Rx chain of the UE 730 .

[0072] Figure 8 An example of a signaling diagram is illustrated, which describes a UE-initiated mode adaptation. According to certain example embodiments, neighboring cells 850 and 860 and serving cell 830 may be similar to NE 1010, and UE 840 may be similar to UE 1020, such as Fig.10 shown.

[0073] Figure 8 Various embodiments are described in which the UE can initiate the adaptation of the reception mode. The network may have configured Mode 1 as the default mode of the UE 830. The UE 830 may trigger the process by sending a message with a preferred mode, and the NE 820 responds by confirming the change of the reception mode, or maintaining the change, or falling back to the default mode configuration. If at some point the UE 830 starts an application requiring high throughput and low latency, the UE 830 may request the network to change the reception mode to Mode 2. If at some point the UE 830 detects a high mobility state, the UE 830 may trigger a mode change to Mode 3, and ensure that mobility measurements are more accurate. Similarly, if the UE 830 is in Mode 2 or Mode 3, which has a higher power requirement, and needs to save power, the UE 830 may fall back to Mode 1.

[0074] In some embodiments, UE 830 may determine an application with high throughput / high mobility / power saving needs, for example, when UE 830 identifies that the battery power is low, UE 830 may activate mode 1 to save battery power. Alternatively, UE 830 may identify an increase in data services with demanding QoS requirements, and UE 830 may start mode 2 or mode 3 to improve throughput by using simultaneous reception on Rx1 and Rx2. In addition, if UE 830 identifies that a data service with low latency requirements is started, UE 830 may activate mode 2 to avoid measurement gaps and reduce jitter in data transmission. In addition, if UE 830 identifies that it is moving at a speed higher than a certain speed, UE 830 may activate mode 3 so that it can make better mobility decisions.

[0075] Figure 8 An example embodiment is described where the network configures the same mode as requested by UE 830. However, there may be situations where the network cannot configure UE 830 as requested. For such situations, a fallback state may be assigned, which may be a network configured state, such as Mode 3, or the method implemented in the standard may also have a single default mode, such as Mode 1.

[0076] At 801, UE 840 may activate a first mode, which may be configured as a default mode.

[0077] At 802 , the serving cell 830 may simultaneously exchange data with a first Rx chain of the UE 840 and a second Rx chain of the UE 840 .

[0078] At 803 , neighboring cells 850 and 860 may perform measurements on a first Rx chain of UE 840 and a second Rx chain of UE 840 , respectively (in series), according to a first mode.

[0079] At 804 , the serving cell 830 may simultaneously exchange data with a first Rx chain of the UE 840 and a second Rx chain of the UE 840 according to the first mode.

[0080] At 805 , neighboring cells 850 and 860 may perform measurements on a first Rx chain of UE 840 and a second Rx chain of UE 840 , respectively (in series), according to a first mode.

[0081] At 806, UE 840 may send an indication of a preference for the second mode to serving cell 830.

[0063] In various example embodiments, the second mode may require fewer or no scheduling restrictions, thereby improving latency.

[0082] At 807 , the serving cell 830 may send a configuration of the second mode to the first Rx chain of the UE 840 .

[0083] At 808 , the serving cell 830 , the neighbor cell 850 , and the neighbor cell 860 may simultaneously exchange data with the first Rx chain and the second Rx chain of the UE 840 , and perform measurement on the second Rx chain and the first Rx chain of the UE 840 .

[0084] At 809, UE 840 may send an indication of a preference for the third mode to serving cell 830. In various example embodiments, UE 840 may prefer the third mode if faster measurements are required due to extremely high mobility of UE 840.

[0085] At 810 , the serving cell 830 may transmit a configuration of a third mode to a first Rx chain of the UE 840 .

[0086] At 810 , a first Rx chain and a second Rx chain of a serving cell 830 and a UE 840 may exchange data.

[0087] At 811 , the serving cell 830 , the neighbor cell 850 , and the neighbor cell 860 may simultaneously exchange data with the first Rx chain and the second Rx chain of the UE 840 , and perform measurement on the second Rx chain and the first Rx chain of the UE 840 .

[0088] At 812 , the first Rx chain and the second Rx chain of the serving cell 830 and the UE 840 may exchange data.

[0089] At 813 , the serving cell 830 , the neighbor cell 850 , and the neighbor cell 860 may simultaneously exchange data with the first Rx chain and the second Rx chain of the UE 840 , and perform measurements on the second Rx chain and the first Rx chain of the UE 840 .

[0090] At 814, UE 840 may send an indication of a preference for the first mode to serving cell 830. In various example embodiments, UE 840 may prefer the first mode if UE 840 needs to turn off one Rx more quickly to save power.

[0091] At 815 , the serving cell 830 may send a configuration of the first mode to the first Rx chain of the UE 840 .

[0092] At 816 , the serving cell 830 and the first Rx chain and the second Rx chain of the UE 840 may exchange data according to the first mode.

[0093] At 817 , the serving cell 830 , the neighbor cell 850 , and the neighbor cell 860 may simultaneously exchange data with the first Rx chain and the second Rx chain of the UE 840 , and perform measurement on the second Rx chain and the first Rx chain of the UE 840 according to the first mode.

[0094] Fig. 9 An example of a signaling diagram is illustrated that describes an RRC-based implementation of a UE-triggered mode change. According to certain example embodiments, serving cell 920 may be similar to NE 1010, and UE 910 may be similar to UE 1020, such as Fig.10 shown.

[0095] Specifically, Fig. 9 An embodiment based on RRC signaling is illustrated. The serving cell 920 may indicate multiRx-AssistanceConfig to indicate to the UE 910 that the serving cell 920 has enabled adaptation of multiple Rx chains and configures relevant parameters for use by the UE 910 when adapting each multi-Rx mode. The indication is shown in the RRC reconfiguration message. In addition, the serving cell 920 may indicate the default multi-Rx mode to be used by the UE 910. In order to signal the network configuration, new information elements such as multi-Rx-assistance configuration, multi-Rx-default mode with a default mode of multiple Rx chains, and multi-Rx-timer may be defined in the RRC reconfiguration message.

[0096] At 901, the serving cell 920 may send an RRC reconfiguration message to the UE 910, which may include a multi-Rx-assisted configuration, a multi-Rx-default mode = Mode 1, and a multi-Rx-timer. For example, the multi-Rx-timer may be used to prevent the UE 910 from requesting changes too frequently; therefore, these modes may be active at least for the duration of the multi-Rx-timer.

[0097] At 902 , UE 910 may send an RRC reconfiguration complete message to serving cell 920 .

[0098] At 903, the UE 910 may send a UL-DCCH-message type message to the serving cell 920, which may include UE assistance information and multi-Rx-preferred mode=Mode 2. After the RRC reconfiguration is complete, the UE 910 may use the UE assistance information to indicate its preferred multi-Rx mode to the serving cell 920. A new UE assistance information element may be included to indicate the UE preferred mode, multi-Rx-preferred mode.

[0099] At 904 , the serving cell 920 may send an RRCReconfiguration message to the UE 910 , which may include Multi-Rx-Configuration=Mode2.

[0100] At 905 , UE 910 may send an RRC reconfiguration complete message to serving cell 920 .

[0101] Fig.10 An example of a system according to some example embodiments is illustrated.In an example embodiment, the system may include a plurality of devices, such as NE 1010 and / or UE 1020.

[0102] NE 1010 may be one or more of a base station (such as an eNB or gNB), a serving gateway, a server and / or any other access node or a combination thereof.

[0103] The NE 1010 may also include at least one gNB-CU that may be associated with at least one gNB-DU. The at least one gNB-CU and the at least one gNB-DU may communicate with each other via the 5GC via at least one F1 interface, at least one X n -C interface, and / or at least one NG interface for communication.

[0104] UE 1020 may include one or more mobile devices, such as a mobile phone, a smart phone, a personal digital assistant (PDA), a tablet or portable media player, a digital camera, a pocket camera, a video game console, a navigation unit (such as a global positioning system (GPS) device), a desktop or laptop computer, a single positioning device (such as a sensor or smart meter), or any combination thereof. In addition, NE 1010 and / or UE 1020 may be one or more residential broadband wireless service devices (CBSDs).

[0105] NE 1010 and / or UE 1020 may include at least one processor, respectively denoted as 1011 and 1021. Processors 1011 and 1021 may be embodied by any computing or data processing device, such as a central processing unit (CPU), an application specific integrated circuit (ASIC), or the like. The processor may be implemented as a single controller, or multiple controllers or processors.

[0106] As shown in 1012 and 1022, at least one memory may be provided in one or more devices. The memory may be fixed or removable. The memory may include computer program instructions or computer code contained therein. Memories 1012 and 1022 may independently be any suitable storage device, such as a non-transitory computer-readable medium. The term "non-transitory" used herein may correspond to the limitations of the medium itself (i.e., tangible, rather than a signal), rather than the limitations of data storage persistence (e.g., RAM vs. ROM). A hard disk drive (HDD), random access memory (RAM), flash memory, or other suitable memory may be used. The memory may be combined on a single integrated circuit as a processor, or may be separated from one or more processors. In addition, the computer program instructions stored in the memory and processed by the processor may be computer program codes in any suitable form, for example, a compiled or interpreted computer program written in any suitable programming language.

[0107] Processors 1011 and 1021, memories 1012 and 1022, and any subset thereof may be configured to provide Figure 4-Figure 9 Components corresponding to the various boxes of . Although not shown, the device may also include positioning hardware, such as GPS or micro-electromechanical system (MEMS) hardware, which can be used to determine the location of the device. Other sensors are also allowed and can be configured to determine location, altitude, speed, orientation, etc., such as a barometer, compass, etc.

[0108] like Fig.10 As shown, transceivers 1013 and 1023 may be provided, and one or more devices may also include at least one antenna, shown as 1014 and 1024, respectively. The device may have many antennas, such as an antenna array configured for multiple-input multiple-output (MIMO) communication, or multiple antennas for multiple RATs. For example, other configurations of these devices may be provided. Transceivers 1013 and 1023 may be transmitters, receivers, both transmitters and receivers, or units or devices that may be configured for both transmission and reception.

[0109] The memory and the computer program instructions may be configured to, together with the processor of a specific device, cause a hardware device (such as a UE) to perform any of the above processes (ie, Figure 4-Figure 9 ). Thus, in certain example embodiments, a non-transitory computer-readable medium may be encoded with computer instructions that, when executed in hardware, perform a process such as one of the processes described herein. Alternatively, certain example embodiments may be performed entirely in hardware.

[0110] In certain example embodiments, the apparatus may include a Figure 4-Figure 9As used in this application, the term "circuitry" may refer to one or more or all of the following: (a) a hardware-only circuit implementation (such as an implementation in analog and / or digital circuitry only), (b) a combination of hardware circuitry and software, such as (as applicable): (i) a combination of (multiple) analog and / or digital hardware circuits and software / firmware, and (ii) any portion of (multiple) hardware processors (including (multiple) digital signal processors), software, and (multiple) memories with software, which work together to enable a device (such as a mobile phone or server) to perform various functions), and (c) (multiple) hardware circuits and / or (multiple) processors, such as (multiple) microprocessors or portions of (multiple) microprocessors, which require software (e.g., firmware) to operate, but when software is not required for operation, the software may not be present. This definition of circuitry applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or process and its accompanying software and / or firmware. For example, the term circuitry would also cover, if applicable to a particular claim element, a baseband integrated circuit or a processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or networking equipment.

[0111] Fig.11 An example of a 5G network and system architecture according to certain example embodiments is illustrated. A plurality of network functions are shown, which may be implemented as software operating as part of a network device or dedicated hardware, as a network device itself or dedicated hardware, or as a virtual function operating as a network device or dedicated hardware. Fig.11 The NE and UE shown may be similar to NE 1010 and UE 1020, respectively. The user plane function (UPF) may provide services such as intra-RAT and inter-RAT mobility, routing and forwarding of data packets, inspection of packets, user plane quality of service (QoS) processing, buffering of downlink packets and / or triggering of downlink data notifications, etc. The application function (AF) may be primarily interfaced with the core network to facilitate application use of service routing and interact with the policy framework.

[0112] According to some example embodiments, processors 1011 and 1021 and memories 1012 and 1022 may be included in a processing circuit system or a control circuit system, or may form a part of a processing circuit system or a control circuit system. In addition, in some example embodiments, transceivers 1013 and 1023 may be included in a transceiver circuit system, or may form a part of a transceiver circuit system.

[0113] In some example embodiments, an apparatus (e.g., NE 1010 and / or UE 1020) may include a component for performing a method, process, or any variant discussed herein. Examples of the component may include one or more processors, memories, controllers, transmitters, receivers, and / or computer program codes for causing the execution of operations.

[0114] In various example embodiments, the apparatus 1020 may be controlled by the memory 1022 and the processor 1021 to receive from a serving cell at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode; send to the serving cell an indication that at least one multi-receive chain user equipment mode is preferred; and in response to sending an indication that at least one multi-receive chain user equipment mode is preferred, receive from the serving cell an indication that at least one preferred multi-receive chain user equipment mode is operating.

[0115] Certain example embodiments may be directed to an apparatus comprising components for performing any of the methods described herein, for example, components for receiving at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode from a serving cell; components for sending an indication that at least one multi-receive chain user equipment mode is preferred to the serving cell; and components for receiving from the serving cell an indication that at least one preferred multi-receive chain user equipment mode is operating in response to sending an indication that at least one multi-receive chain user equipment mode is preferred.

[0116] In various example embodiments, the apparatus 1010 may be controlled by the memory 1012 and the processor 1011 to send at least one wireless resource control configuration associated with at least one multi-receiver chain user equipment mode to a user equipment; receive from the user equipment an indication that at least one multi-receiver chain user equipment mode is preferred; and in response to receiving an indication that at least one multi-receiver chain user equipment mode is preferred, send to the user equipment an indication that at least one preferred multi-receiver chain user equipment mode is operating.

[0117] Certain example embodiments may be directed to an apparatus comprising components for performing any of the methods described herein, for example, components for receiving at least one radio resource control configuration or device capability report signal associated with at least one multi-receive chain user equipment mode from a serving cell; components for sending an indication that at least one multi-receive chain user equipment mode is preferred to the serving cell; and components for receiving from the serving cell an indication that at least one preferred multi-receive chain user equipment mode is operating in response to sending an indication that at least one multi-receive chain user equipment mode is preferred.

[0118] The features, structures, or characteristics of the example embodiments described throughout this specification may be combined in any suitable manner in one or more example embodiments. For example, the use of the phrases "various embodiments," "certain embodiments," "some embodiments," or other similar language throughout this specification refers to the fact that a particular feature, structure, or characteristic described in conjunction with the example embodiments may be included in at least one example embodiment. Thus, the appearances of the phrases "in various embodiments," "certain embodiments," "in some embodiments," or other similar language throughout this specification do not necessarily all refer to the same set of example embodiments, and the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments.

[0119] As used herein, “at least one of: ” and “at least one of ” and similar expressions (wherein a list of two or more elements is connected by “and” or “or”) refer to at least any one of these elements, or at least any two or more of these elements, or at least all of these elements.

[0120] In addition, if necessary, the above-mentioned different functions or processes can be performed in different orders and / or simultaneously with each other. In addition, if necessary, one or more of the above-mentioned functions or processes can be optional or can be combined. Therefore, the above description should be considered as an explanation of the principles and teachings of some example embodiments, rather than a limitation thereof.

[0121] Those skilled in the art will readily appreciate that the example embodiments discussed above may be practiced with processes in a different order and / or with hardware elements in configurations different from those disclosed. Therefore, although some embodiments have been described based on these example embodiments, it will be apparent to those skilled in the art that certain modifications, variations, and alternative constructions will be apparent while remaining within the spirit and scope of the example embodiments.

[0122] Partial Glossary

[0123] 3GPP: Third Generation Partnership Project

[0124] 5G: Fifth Generation

[0125] 5GC: Fifth Generation Core

[0126] 5GS: Fifth Generation System

[0127] 6G: Sixth Generation

[0128] AMF: Access and Mobility Management Function

[0129] ASIC: Application-Specific Integrated Circuit

[0130] BS: Base Station

[0131] CAPC: Channel Access Priority Class

[0132] CBSD: Residential Broadband Wireless Service Device

[0133] CN: Core Network

[0134] CPU: Central Processing Unit

[0135] CSI: Channel State Information

[0136] DCI: Downlink Control Information

[0137] DL: Downlink

[0138] eMBB: enhanced mobile broadband

[0139] eMTC: Enhanced Machine Type Communications

[0140] eNB: Evolved Node B

[0141] EPS: Evolved Packet System

[0142] FR: Frequency range

[0143] gNB: Next Generation Node B

[0144] GPS: Global Positioning System

[0145] HDD: Hard Disk Drive

[0146] L1: Layer 1

[0147] L2: Layer 2

[0148] LTE: Long Term Evolution

[0149] LTE-A: Long Term Evolution Advanced

[0150] MAC: Media Access Control

[0151] MBS: Multicast and Broadcast System

[0152] MC: Multicast

[0153] MCS: Modulation Coding Scheme

[0154] MEMS: Micro-Electro-Mechanical Systems

[0155] MIB: Master Information Block

[0156] MIMO: Multiple Input Multiple Output

[0157] MME: Mobility Management Entity

[0158] mMTC: Massive Machine Type Communications

[0159] MPDCCH: Machine Type Communication Physical Downlink Control Channel MTC: Machine Type Communication

[0160] NAS: Non-Access Stratum

[0161] NB-IoT: Narrowband Internet of Things

[0162] NE: Network Entity

[0163] NG: Next Generation

[0164] NG-eNB: Next Generation Evolved Node BNG-RAN: Next Generation Radio Access Network

[0165] NR: New Radio

[0166] NR-U: New Radio License-free

[0167] OFDM: Orthogonal Frequency Division Multiplexing

[0168] PDA: Personal Digital Assistant

[0169] PDCCH: Physical Downlink Control Channel PDSCH: Physical Downlink Shared Channel

[0170] PRB: Physical Resource Block

[0171] RAM: Random Access Memory

[0172] RAN: Radio Access Network

[0173] RAT: Radio Access Technology

[0174] RE: Resource Element

[0175] RLC: Radio Link Control

[0176] RRC: Radio Resource Control

[0177] RRM: Radio Resource Management

[0178] RS: Reference signal

[0179] RSRP: Reference Signal Received Power

[0180] SDU: Service Data Unit

[0181] SMF: Session Management Function

[0182] SMTC: Synchronization Signal / Physical Broadcast Channel Block Measurement Timing Configuration

[0183] SR: Dispatch Report

[0184] SRB: Signaling Radio Bearer

[0185] SSB: Synchronization Signal Block

[0186] TB: Transport Block

[0187] Tx: Transmission

[0188] UE: User Equipment

[0189] UL: Uplink

[0190] UMTS: Universal Mobile Telecommunications System

[0191] UPF: User Plane Function

[0192] URLLC: Ultra-Reliable Low-Latency Communications

[0193] UTRAN: Universal Mobile Telecommunications System Terrestrial Radio Access Network

[0194] WLAN: Wireless Local Area Network

Claims

1. A method comprising: receiving at least one radio resource control configuration or device capability report signal associated with at least one multiple receive chain user equipment mode from a serving cell; sending an indication to the serving cell that at least one multiple receive chain user equipment mode is preferred; and In response to sending the indication that at least one multiple receive chain user equipment mode is preferred, receiving an indication from the serving cell that the at least one preferred multiple receive chain user equipment mode is operating.

2. The method according to claim 1, further comprising: Data is received from the serving cell according to the at least one preferred multiple-receiver-chain user equipment mode.

3. The method according to any one of claims 1 or 2, further comprising: Based on the at least one preferred multiple receive chain user equipment mode, receiving, at a first receiver, from a first cell at least one of: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel; and Based on the at least one preferred multi-receive chain user equipment mode, simultaneously with the measurement of at least one synchronization signal block received at the first receiver, at the second receiver, at least one of the following items is received from the first cell: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel.

4. The method according to any one of claims 1 to 3, further comprising: Based on the at least one preferred multiple receive chain user equipment mode, at the first receiver, receiving from a first cell at least one of: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel; and Based on the at least one preferred multi-receive chain user equipment mode, at the second receiver, at least one of the following items is received from a second cell having a cell identifier different from that of the first cell: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel, and the at least one item is at least partially overlapped in time with at least one synchronization signal block measurement received at the first receiver.

5. The method according to any one of claims 1 to 4, further comprising: receiving, at the first receiver, one of the signals from a cell based on the at least one preferred multiple receive chain user equipment mode; as well as receiving, at the first receiver, a signal associated with an active data connection from a cell; as well as Based on the at least one preferred multi-receive chain user equipment mode, simultaneously with at least one signal received at the first receiver, at the second receiver, at least one synchronization signal block measurement is measured from the cell, and the at least one synchronization signal block measurement is at least partially overlapped in time with the signal related to the data exchange at the first receiver.

6. The method according to any one of claims 1 to 5, further comprising: At the first receiver and the second receiver, the slave cell performs at least one of the following tasks: measurement of a synchronization signal block, measurement of a channel state information reference signal, or demodulation of a physical downlink control channel or a physical downlink shared channel.

7. The method according to any one of claims 1 to 5, further comprising, based on the at least one preferred multi-receive chain user equipment mode, at least one of the following: performing, at the first receiver, measurement of at least one of a synchronization signal block, a channel state information reference signal, demodulation of a physical downlink control channel, or demodulation of a physical downlink shared channel from the first cell; and At the second receiver, measurement of at least one of a synchronization signal block, a channel state information reference signal, demodulation of a physical downlink control channel, or demodulation of a physical downlink shared channel is performed from the first cell or the second cell.

8. The method according to any one of claims 1 to 7, wherein the radio resource control configuration comprises at least one of the following items: an indication that mode adaptation is allowed; and An indication that at least one of the allowed modes is to be used.

9. A method comprising: sending at least one radio resource control configuration associated with at least one multiple receiver chain user equipment mode to a user equipment; receiving from the user equipment at least one indication that a multiple receiver chain user equipment mode is preferred; and In response to receiving the indication that at least one multiple-receiver-chain user equipment mode is preferred, an indication is sent to the user equipment that the at least one preferred multiple-receiver-chain user equipment mode is operating.

10. The method according to claim 9, further comprising: At least one of a gap or a scheduling restriction is initiated based on the configured multi-receiver chain mode.

11. An apparatus comprising: at least one processor; as well as at least one memory storing instructions, which, when executed by the at least one processor, cause the apparatus to at least: receiving at least one radio resource control configuration or device capability report signal associated with at least one multiple receive chain user equipment mode from a serving cell; sending an indication to the serving cell that at least one multiple receive chain user equipment mode is preferred; and In response to sending the indication that at least one multiple receive chain user equipment mode is preferred, receiving an indication from the serving cell that the at least one preferred multiple receive chain user equipment mode is operating.

12. The apparatus of claim 11, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least: Data is received from the serving cell according to the at least one preferred multiple-receiver-chain user equipment mode.

13. The apparatus according to any one of claims 11 or 12, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least: Based on the at least one preferred multiple receive chain user equipment mode, receiving, at a first receiver, from a first cell at least one of: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel; and Based on the at least one preferred multi-receive chain user equipment mode, simultaneously with the measurement of at least one synchronization signal block received at the first receiver, at the second receiver, at least one of the following items is received from the first cell: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel.

14. The apparatus according to any one of claims 11 to 13, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least: Based on the at least one preferred multiple receive chain user equipment mode, at the first receiver, receiving from a first cell at least one of: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel; and Based on the at least one preferred multi-receive chain user equipment mode, at the second receiver, at least one of the following items is received from a second cell having a cell identifier different from that of the first cell: a synchronization signal block, a channel state information reference signal, a physical downlink control channel, or a physical downlink shared channel, and the at least one item is at least partially overlapped in time with at least one synchronization signal block measurement received at the first receiver.

15. The apparatus according to any one of claims 11 to 14, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least: receiving, at the first receiver, one of the signals from a cell based on the at least one preferred multiple receive chain user equipment mode; as well as receiving, at the first receiver, a signal associated with an active data connection from a cell; as well as Based on the at least one preferred multi-receive chain user equipment mode, simultaneously with at least one signal received at the first receiver, at the second receiver, at least one synchronization signal block measurement is measured from the cell, and the at least one synchronization signal block measurement is at least partially overlapped in time with the signal related to the data exchange at the first receiver.

16. The apparatus according to any one of claims 11 to 15, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least: At the first receiver and the second receiver, the slave cell performs at least one of the following tasks: measurement of a synchronization signal block, measurement of a channel state information reference signal, or demodulation of a physical downlink control channel or a physical downlink shared channel.

17. The apparatus according to any one of claims 11 to 15, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least, based on the at least one preferred multi-receive chain user equipment mode, perform at least one of the following: performing, at the first receiver, measurement of at least one of a synchronization signal block, a channel state information reference signal, demodulation of a physical downlink control channel, or demodulation of a physical downlink shared channel from the first cell; and At the second receiver, measurement of at least one of a synchronization signal block, a channel state information reference signal, demodulation of a physical downlink control channel, or demodulation of a physical downlink shared channel is performed from the first cell or the second cell.

18. The apparatus according to any one of claims 11 to 17, wherein the radio resource control configuration comprises at least one of the following items: an indication that mode adaptation is allowed; and An indication that at least one of the allowed modes is to be used.

19. An apparatus comprising: at least one processor; as well as at least one memory storing instructions, which, when executed by the at least one processor, cause the apparatus to at least: sending at least one radio resource control configuration associated with at least one multiple receiver chain user equipment mode to a user equipment; receiving from the user equipment at least one indication that a multiple receiver chain user equipment mode is preferred; and In response to receiving the indication that at least one multiple-receiver-chain user equipment mode is preferred, an indication is sent to the user equipment that the at least one preferred multiple-receiver-chain user equipment mode is operating.

20. The apparatus of claim 19, wherein the at least one memory and the instructions, when executed by the at least one processor, further cause the apparatus to at least: At least one of a gap or a scheduling restriction is initiated based on the configured multi-receiver chain mode.

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