Method, apparatus, and computer-readable storage medium for time-domain adaptive monitoring of multi-carrier PDCCH

Abstract

A time-domain adaptive method, apparatus, and computer-readable storage medium for a multi-carrier PDDCH monitoring mechanism are provided. In an example implementation, the method may include: a user equipment receiving configuration information configuring one or more search space groups for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier; and monitoring at least the first search space group by the user equipment. The method may further include: detecting whether a condition for switching from the first search space group to the second search space group is met, and, in response to detecting that the condition is met, switching the monitoring from at least the first search space group to at least the second search space group.

Description

Technical Field

[0001] This specification relates to wireless communication, and in particular to the monitoring of the search space. Background Technology

[0002] A communication system can be a facility that enables communication between two or more nodes or devices (such as fixed or mobile communication devices). Signals can be carried on wired or wireless carriers.

[0003] An example of a cellular communication system is the architecture being standardized by the 3rd Generation Partnership Project (3GPP). Recent developments in this area are often referred to as the Long Term Evolution (LTE) of Universal Mobile Telecommunications System (UMTS) radio access technology. E-UTRA (Evolved UMTS Terrestrial Radio Access) is the air interface for 3GPP's LTE upgrade path for mobile networks. In LTE, base stations or APs, referred to as Enhanced Access Points (APs) or Evolved Node Bs (eNBs), provide radio access within a coverage area or cell. In LTE, mobile devices or mobile stations are referred to as User Equipment (UEs). LTE has included several improvements or developments.

[0004] The development of 5G New Radio (NR) is part of an ongoing evolution of mobile broadband to meet the requirements of 5G, similar to the early evolution of 3G and 4G wireless networks. In addition to mobile broadband, 5G also targets emerging use cases. The goal of 5G is to deliver significant improvements in wireless performance, which may include new levels of data rates, latency, reliability, and security. 5G NR can also be extended to effectively connect massive Internet of Things (IoT) networks and can provide new mission-critical services. Ultra-Reliable Low-Latency Communication (URLLC) devices may require high reliability and very low latency. Summary of the Invention

[0005] Various example implementations are described and / or illustrated. Details of one or more implementation examples are set forth in the accompanying drawings and the following description. Other features will be apparent from the description and drawings and from the claims.

[0006] A time-domain adaptive method, apparatus, and computer-readable storage medium for a multi-carrier PDDCH monitoring mechanism are provided. In an example implementation, the method may include: a user equipment receiving configuration information configuring one or more search space groups for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier; and monitoring at least the first search space group by the user equipment. The method may further include: detecting whether a condition for switching from the first search space group to the second search space group is met, and, in response to detecting that the condition is met, switching the monitoring from at least the first search space group to at least the second search space group.

[0007] In an additional example implementation, the method may include a network node (e.g., a gNB) sending configuration information to a user equipment (UE) for configuring one or more search space groups at the UE for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier. The method may further include: determining whether conditions for switching from the first search space group to the second search space group are met, and sending a physical downlink control channel to the UE in at least the second search space group on the second carrier. Attached Figure Description

[0008] Figure 1 This is a block diagram of a wireless network implemented based on an example.

[0009] Figure 2 The illustration shows the switching of autonomous search space groups implemented according to the example.

[0010] Figure 3 The diagram illustrates a time-domain adapted multicarrier PDDCH monitoring mechanism implemented based on an example.

[0011] Figure 4 The diagram illustrates a mechanism for determining when to monitor the PDCCH, implemented according to an example.

[0012] Figure 5 The illustration shows an example implementation for NR-unlicensed (NR-U) based on the example implementation.

[0013] Figure 6 This is a flowchart illustrating the time-domain adapted multicarrier PDDCH monitoring mechanism implemented according to an example.

[0014] Figure 7 This is a flowchart illustrating the time-domain adapted multicarrier PDDCH monitoring mechanism implemented according to an example.

[0015] Figure 8It is a block diagram of a node or wireless station (e.g., a base station / access point or mobile station / user equipment / UE) implemented according to an example. Detailed Implementation

[0016] Figure 1 This is a block diagram of a wireless network 130 implemented based on an example. Figure 1 In the wireless network 130, user equipment (UD) 131, 132, 133, and 135 (which may also be referred to as mobile stations (MS) or user equipment (UE)) can connect to (and communicate with) a base station (BS, which may also be referred to as an access point (AP), enhanced node B (eNB), next-generation node B (gNB), or network node) 134. At least some of the functions of the access point (AP), base station (BS), (e) node B (eNB), or gNB can also be performed by any node, server, or host operatively coupled to a transceiver (such as a remote radio head). BS (or AP) 134 provides wireless coverage within cell 136, including to user equipment 131, 132, 133, and 135. Although only four user equipments are shown as connected to or attached to BS 134, any number of user equipments can be provided. BS 134 is also connected to core network 150 via S1 interface 151. This is merely a simplified example of a wireless network, and other examples may be used.

[0017] User equipment (user terminal, user equipment (UE)) can refer to portable computing devices that operate with or without a subscriber identification module (SIM) for wireless mobile communication, including but not limited to the following types of devices: mobile station (MS), mobile phone, cell phone, smartphone, personal digital assistant (PDA), handheld device, device using a wireless modem (alarm or measuring device, etc.), laptop and / or touchscreen computer, tablet computer, tablet phone, game console, laptop and multimedia device, or any other wireless device. It should be understood that user equipment can also be a virtually exclusive uplink-only device, an example of which is a camera or camcorder that loads images or video clips onto the network.

[0018] In LTE (as an example), the core network 150 may be referred to as the Evolved Packet Core (EPC), which may include a Mobility Management Entity (MME) that can handle or assist user equipment in moving / handing over between BSs, one or more gateways that can forward data and control signals between the BS and a packet data network or the Internet, and other control functions or blocks.

[0019] Furthermore, through illustrative examples, the various example implementations or techniques described herein can be applied to various types of user equipment or data service types, or to user equipment that may have multiple applications running on it with different data service types. New Radio (5G) developments can support multiple different applications or multiple different data service types, such as, for example: Machine Type Communication (MTC), Enhanced Machine Type Communication (eMTC), Internet of Things (IoT), and / or Narrowband IoT user equipment, Enhanced Mobile Broadband (eMBB), and Ultra Reliable and Low Latency Communication (URLLC).

[0020] The Internet of Things (IoT) can refer to a growing group of objects that have internet or network connectivity, enabling them to send and receive information from other network devices. For example, many sensor-type applications or devices can monitor physical conditions or states and, for instance, send reports to servers or other network devices when events occur. Machine-type communication (MTC or machine-to-machine communication) can be characterized, for example, by fully automated data generation, exchange, processing, and initiation (with or without human intervention) between intelligent machines. Enhanced Mobile Broadband (eMBB) can support much higher data rates than currently available in LTE.

[0021] Ultra-Reliable and Low-Latency Communication (URLLC) is a new type of data service or a new use case that can be supported for new radio (5G) systems. This enables emerging new applications and services such as industrial automation, autonomous driving, vehicle safety, and e-health services. By way of illustrative examples, 3GPP aims to provide U-Plane (user / data plane) latency connections of up to, for example, 1 ms (with 1-1e-5 reliability). Therefore, for example, URLLC user equipment / UEs may require significantly lower block error rates and lower latency than other types of user equipment / UEs. Thus, for example, compared to eMBB UEs (or eMBB applications running on UEs), URLLC UEs (or URLLC applications on UEs) may require much shorter latency.

[0022] The various example implementations can be applied to a variety of wireless technologies or wireless networks (such as LTE, LTE-A, 5G, IoT, MTC, eMTC, eMBB, URLLC, etc.) or any other wireless network or wireless technology. These example networks, technologies, or data service types are provided only as illustrative examples.

[0023] Multiple-input multiple-output (MIMO) can refer to a technique for increasing the capacity of a radio link by using multiple transmit and receive antennas to take advantage of multipath propagation. MIMO can include the use of multiple antennas at the transmitter and / or receiver. MIMO can include a multidimensional approach of transmitting and receiving two or more specific data streams over a single radio channel. For example, MIMO can refer to a technique for simultaneously transmitting and receiving more than one data signal on the same radio channel by taking advantage of multipath propagation. According to an illustrative example, multi-user multiple-input multiple-output (multi-user MIMIO or MU-MIMO) enhances MIMO technology by allowing a base station (BS) or other radio node to simultaneously transmit or receive multiple streams to or from different user equipments or UEs. This can include simultaneously transmitting a first stream to a first UE and a second stream to a second UE via the same (or common or shared) set of physical resource blocks (PRBs) (e.g., where each PRB may include a set of time-frequency resources).

[0024] Furthermore, the BS can use precoding to transmit data to the UE (based on a precoder matrix or precoder vector for the UE). For example, the UE can receive a reference signal or pilot signal and determine a quantized version of the DL channel estimate, thereby providing the BS with an indication of the quantized DL channel estimate. The BS can determine a precoder matrix based on the quantized channel estimate, which can be used to concentrate or guide the transmitted signal energy into the optimal channel direction for the UE. Additionally, each UE can use a determinable decoder matrix, for example, where the UE can receive a reference signal from the BS, determine a channel estimate of the DL channel, and then determine a decoder matrix for the DL channel based on the DL channel estimate. For example, the precoder matrix can indicate antenna weights (e.g., amplitude / gain and phase for each weight) to be applied to the antenna array of the transmitting radio device. Similarly, the decoder matrix can indicate antenna weights (e.g., amplitude / gain and phase for each weight) to be applied to the antenna array of the receiving radio device. This also applies to the UL when the UE is transmitting data to the BS.

[0025] For example, according to the example aspect, the receiving radio user equipment can use Interference Suppression Combination (IRC) to determine the precoder matrix, where the user equipment can receive a reference signal (or other signal) from multiple BSs (e.g., and can measure the signal strength, signal power, or other signal parameters of the signal received from each BS), and can generate a decoder matrix that can suppress or reduce signals from one or more interference sources (or interfering cells or BSs) (e.g., by providing zero (null) (or very low antenna gain) in the direction of the interfering signal) to increase the signal-to-interference-plus-noise ratio (SINR) of the desired signal. To reduce overall interference from multiple different interference sources, the receiver can, for example, use a Linear Minimum Mean Square Error Interference Suppression Combination (LMMSE-IRC) receiver to determine the decoder matrix. IRC receivers and LMMSE-IRC receivers are merely examples, and other types of receivers or techniques can be used to determine the decoder matrix. After the decoder matrix has been determined, the receiving UE / user equipment can apply antenna weights (e.g., each antenna weight includes amplitude and phase) to multiple antennas at the receiving UE or equipment based on the decoder matrix. Similarly, the precoder matrix can include antenna weights that can be applied to the antennas of the transmitting radio equipment or node. This also applies to receiving BS.

[0026] 3GPP Rel-16 TS 38.213 specifies that if a UE is configured to monitor Physical Downlink Control Channel (PDCCH) candidates with a Carrier Indicator field corresponding to a secondary cell in another serving cell, the UE is not expected to monitor PDCCH candidates on the active downlink (DL) bandwidth portion (BWP) of that secondary cell. In Rel-17 Work Item (WI) RP-193260, the baseline assumption is that Pcells will be scheduled from Scells solely based on configuration, e.g., only one scheduling cell based on configuration. However, this approach may not be optimal due to several issues, such as the potential lack of a recovery process for Scells, as a fallback process to Pcells should exist during the period of link quality degradation on the Scell.

[0027] From the UE's perspective, PDCCH decoding is computationally resource-intensive, and the UE's blind decoding (BD) / control channel element (CCE) limits are currently defined on a "scheduled cell" basis. In other words, the UE can determine the limits based on the scheduled cell and count BD and CCE on the search space set / search space of the scheduled cell. For example, for "NR light UEs" (RP-193238 Reduced Capability NR devices), it may be desirable to reduce decoding computational complexity without sacrificing capacity gain from carrier aggregation (CA).

[0028] Therefore, it is desirable and / or necessary to utilize UE PDCCH monitoring capabilities on the scheduled carriers to ensure that UE BD and CCE limits are not exceeded, while minimizing the UE computational requirements for PDCCH decoding to operate the aforementioned scenarios. Additionally, the gNB may require multiple BDs and CCEs from multiple carriers on which it schedules UEs.

[0029] This disclosure describes a time-domain adaptive mechanism for a multi-carrier PDCCH monitoring scheme, wherein the UE can be configured to monitor the PDCCH on at least two carriers according to a single scheduled cell. Furthermore, to avoid exceeding BD / CCE limits and / or concentrating BD / CCE capabilities within the currently used schedule, a time-domain adaptive scheme is proposed, through which the UE is informed of the monitoring timing in each of its configured scheduled cells. Additionally, the UE can be configured (or enabled) to autonomously handover between Surveillance Search Space Groups (SSGs).

[0030] In example implementations, this disclosure describes methods, apparatus, and computer-readable storage media provided for a time-domain multicarrier PDDCH monitoring mechanism. In one example implementation, the method may include: a user equipment receiving configuration information configuring one or more search space groups for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier; and monitoring at least the first search space group by the user equipment. The method may further include: detecting whether a condition for switching from the first search space group to the second search space group is met, and, in response to detecting that the condition is met, switching the monitoring from at least the first search space group to at least the second search space group. In an additional example implementation, the method may include a network node (e.g., a gNB) sending configuration information to the user equipment for configuring one or more search space groups at the user equipment for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier. The method may further include: determining whether the conditions for switching from the first search space group to the second search space group are met, and sending a physical downlink control channel to the user equipment in at least the second search space group on the second carrier.

[0031] Figure 2 The illustration shows the autonomous search space group switching 200 implemented according to the example.

[0032] In the example implementation, at position 210, gNB (e.g., gNB 202, which can be with...) Figure 1 The search space can be configured if it is the same as or similar to BS134.

[0033] At 220, gNB 202 can send a signal to the UE (e.g., UE 204, which can communicate with...). Figure 1 User equipment 131 (which is the same as or similar to the user equipment 131) sends configuration information. In some implementations, for example, the configuration information may provide information related to configuring a search space group (SSG) for multiple scheduling carriers. In some implementations, for example, the multiple scheduling carriers may schedule a single scheduled carrier (e.g., also referred to as a cell or serving cell).

[0034] At 230, UE 204 can monitor SSGs configured for multiple scheduled carriers. In some implementations, the UE can be configured with SSGs for multiple carriers, at least based on configuration information received from the gNB. The UE can be in carrier aggregation (CA) mode and can be configured with multiple carriers or component carriers (CCs). In an example implementation, a UE in CA mode can be configured with a primary cell (Pcell) and one or more secondary cells (e.g., Scell#1, Scell#2, etc.), each secondary cell including one component carrier, wherein these carriers can belong to licensed and / or unlicensed frequency bands.

[0035] In the example implementation, the UE can be configured with an SSG for each scheduled carrier. The SSG can typically be defined by multiple search spaces (SS) used by the UE to monitor the PDCCH.

[0036] In some implementations, for example, to simplify the decoding task at the UE, the entire control area can be subdivided into a common search space (CSS) and a UE-specific search space (USS) that the UE should monitor (e.g., attempt to decode each PDCCH). The CSS can carry common control information and can be monitored by all UEs in the cell (e.g., gNB 202). Additionally, the CSS can be used to carry important initial information, such as paging information, system information, random access procedures, etc. It should be noted that the decoder starts decoding from the first CCE when searching the CSS to simplify the common search. The USS carries UE-specific control information and can be monitored by at least one UE in the cell. Unlike the CSS, the starting position of the USS can vary for each subframe or UE. It should be noted that the starting position of the USS can be determined in each subframe, for example, using a hash function as specified in TS 38.213.

[0037] In the USS, the UE can detect and decode PDCCH by monitoring a set of PDCCH candidate sets (a set of consecutive CCEs to which the PDCCH can be mapped) in each subframe. If the UE does not detect a CRC error when demasking the CRC (16-bit value, also known as C-RNTI) on the PDCCH using its RNTI, the UE determines that the PDCCH carries its own control information. The PDCCH candidates monitored by the UE are defined by a configured search space set, and different search space sets can be associated with different PDCCH formats. In some implementations, for example, the UE may be able to monitor up to four different PDCCH formats at a given time.

[0038] In some implementations, an SSG can be configured as a CSS or a USS. Alternatively, a CSS or a portion thereof can remain ungrouped and always monitored. In an example implementation, a UE can be configured with SSG#0 and SSG#1 for a first scheduling carrier (e.g., a Pcell) and SSG#0 and SSG#1 for a second scheduling carrier (e.g., an Scell ​​or Scell#1 in the case of multiple Scells configured at the UE). In some implementations, for example, each SSG may include one or more search spaces (SS).

[0039] At 240, UE 204 can detect a trigger to change the monitored SSG. In other words, for example, the UE can detect whether a condition for switching the SSG is met. In an example implementation, this condition may include determining that the UE is not detecting a predefined signal or channel (e.g., PDCCH) on the scheduled carrier during the measurement timing of the scheduled carrier. In another example implementation, this condition may include determining that the UE is detecting or reporting a Channel Quality Indicator (CQI) below a threshold during the measurement timing of the scheduled carrier. In yet another example implementation, this condition may include determining that the UE is detecting a Radio Link Failure (RLF) on the Physical Downlink Control Channel (PDCCH) during the measurement timing of another scheduled carrier.

[0040] At position 250, UE 204 can initiate a handover of the SSG. In some implementations, for example, the UE can switch the SSG used to monitor the PDCCH in response to determining that the condition is met.

[0041] Therefore, the above mechanism provides autonomous search space group switching at the UE, which is also known to the gNB.

[0042] In addition, this disclosure proposes a time-domain adaptive method for enabling multi-carrier PDCCH monitoring, as shown in the reference. Figure 3As described in detail. In the example implementation, the proposed method may include a UE in CA mode with at least two CCs (e.g., Pcell and Scell), which are configured with their own SSGs for CSS and USS.

[0043] Furthermore, each configured search space for a serving cell (e.g., Pcell and Scell) can have associated monitoringSlotPeriodicityAndOffset and duration parameters, as defined in 3GPP TS38.213. The timing of monitoring for each search space of a Pcell and one or more Scells is configured via an RRC procedure.

[0044] In some implementations, for example, the configuration information used for SS PDCCH monitoring can be modified to include additional fields, which may include at least the following: i) Priority: The priority field can define the priority used for SS monitoring if there is a conflict with an SS configured for another serving cell. The priority value can be different for SSs of different serving cells. Equal priority values ​​for several SSs of the same serving cell indicate that the UE can monitor all SSs with the same priority in the time slot where the monitoring timing conflicts. In some implementations, for example, the priority can be semi-statically triggered and / or dynamically changing based on one or more criteria established by the Pcell. For example, the priority value can be configured based on a Channel Quality Indicator (CQI) threshold, where the serving cell with the highest priority can establish the SS to be monitored by the UE. In some implementations, for example, a hysteresis value can also be used to avoid ambiguous scenarios and / or frequent handovers between monitored SSs of serving cells. ii) Cross-scheduled serving cells: This field can include a list of serving cells that can be scheduled by a scheduling cell for which SS configurations have been defined. Two examples of configurable cross-carrier scheduling include: a) the UE is being monitored on a Pcell, and the Pcell can perform cross-carrier scheduling of Scell ​​PDSCH / PUSCH and local cell scheduling of USS and CSS for the UE; and b) the UE is being monitored on an Scell, and the Scell ​​can perform cross-carrier scheduling of Pcell PDSCH / PUSCH, other Scell ​​PDSCH / PUSCH and local cell scheduling of USS and CSS for the UE.

[0045] Furthermore, in some implementations, for example, the gNB can instruct the UE to monitor different SS groups in at least two scheduled cells in the scheduled or unscheduled DCI, and the gNB can instruct that no SS groups are being monitored in a scheduled cell. For example, the states listed below can be indicated for two scheduled cells. Additionally, receiving a state change can satisfy the conditions for switching from a first search space group to a second search space group. In some implementations, the second group may not contain any search space set, and is indicated herein as "none".

[0046] state Community 1 Community 2 0 SS Group 0 SS Group 1 1 SS Group 0 none 2 none SS Group 1

[0047] Figure 3 The illustration shows the time-domain adaptive 300 of the multi-carrier PDDCH monitoring mechanism implemented according to the example.

[0048] In the example implementation, at position 305, the UE (e.g., Figure 2 UE 204 can be in an RRC connected (e.g., RRC_CONNECTED) state. When the UE is initially powered on, it is in an idle (e.g., RRC_IDLE) state and can move to the RRC_CONNECTED state using the initial access or connection establishment. If there is no activity from the UE (e.g., for a short period of time), the UE can release its RRC connection and move to RRC_IDLE, or suspend its session and move to the RRC inactive (e.g., RRC_INACTIVE) state, and can resume its session by moving back to the RRC connected state.

[0049] At 310, UE 204 can begin monitoring the configured search space group to receive the Pcell's Physical Downlink Control Channel (PDDCH).

[0050] At 315, UE 204 can determine whether any Scell ​​is active. In some implementations, the UE can detect the activation of one or more Scells. In an example implementation, the UE can detect the activation of one Scell ​​(e.g., Scell ​​#1). In another example implementation, the UE can detect the activation of two Scells (e.g., Scell ​​#1 and Scell ​​#2). These are just example implementations, and more than two Scells can be active at the UE. Additionally, in some implementations, the UE can determine whether any Scell ​​is deactivated. In response to determining that one or more Scells are active / deactivated, for example at 317, if at least one Scell ​​is still active, the UE can proceed to 320. Otherwise, the UE can return to 310.

[0051] Alternatively, at 319, in response to the detection that no Scell ​​has been activated, the UE can proceed to 310 and continue monitoring the Pcell's PDCCH.

[0052] At 320, UE 204 can sort the search spaces (SS) of active serving cells (Scells). In some implementations, for example, UE 204 can sort the SS of Pcells and Scells and can create a sorted list (e.g., SSlist). In the example implementation, the SSlist can be created based on one or more priority criteria established by the Pcell for each search space's PDCCH monitoring mode. In other words, the gNB can configure (e.g., pre-configure) the UE to have a monitoring mode based on active Scells and their priorities. It should be noted that modifications to active Scells can lead to a re-access to priorities, as some Scells may be inactive and may need to be dropped from monitoring. For example, as... Figure 4 As shown in detail, Pcell can be configured with priority 2, Scell#1 can be configured with priority 4, and Scell#2 can be configured with priority 3, where Scell#1 with priority 4 has the highest priority of the serving cell. In some implementations, for example, serving cells with the same priority can be randomly ordered or ordered in a predetermined order.

[0053] In the example implementation, Pcell can be configured with search spaces SS#1 and SS#2, Scell#1 can be configured with search spaces SS#3 and SS#4, and Scell#2 can be configured with search spaces SS#5 and SS#6. The UE can create an SSlist based on the priority of the serving cell's SSs, which can include SS#3, SS#4, SS#5, SS#6, SS#1, and SS#2 in sequence.

[0054] At position 325, UE 204 can establish a time grid and number the time slots based on, for example, the maximum subcarrier spacing (SCS) of the serving cell. In some implementations, for example, as... Figure 4 As detailed, the UE can establish a time grid based on 412 (e.g., an SCS of 30 kHz, maximum SCS). In other words, the SS can be configured with the periodicity and monitoring timing described above, establishing a time slot on which PDCCH monitoring begins. Numbering the time slots helps align different PDCCH monitoring patterns, which can also be used for carriers with different SCS, such as... Figure 4 As shown in the image.

[0055] At 330, UE 204 can map the PDCCH monitoring pattern configured for the serving cell to the established reference time grid, as provided by... Figure 4 See section 430 for details.

[0056] At 335, UE 204 can select the first time slot (e.g., n=0).

[0057] At 340, UE 204 can select the first SS in the SSlist for the first time slot to verify whether the SS is configured for transmission in that time slot.

[0058] In some implementations, for example, it should be noted that the operations at 335 and 340 are repeated for each time slot.

[0059] At 345, the UE can determine whether the selected SS needs to be monitored by the PDCCH in time slot n. At 347, in response to the affirmative response at 345, the UE can proceed to 350.

[0060] At 350, UE 204 can set the monitoring for a given time slot n to the serving cell associated with the corresponding cell, and proceed to 355.

[0061] At position 355, UE 204 can continue to select the next time slot.

[0062] In some implementations, for example, for mixed parameter sets, such as Figure 4 As shown, partial time-slot monitoring is permitted, for example, in the Pcell+Scell#2 scenario: time slots 2 and 3 corresponding to the Scell#2 downlink based on the SCS 30kHz time grid, as well as a special time slot. For time slot 2, the UE can determine whether to monitor Scell#2 based on priority, and partial time-slot monitoring allows the UE to monitor the latter half of time slot 1 with SCS = 15kHz (i.e., time slot 3 with SCS of 30kHz).

[0063] Alternatively, at 349, in response to a negative response at 345 (e.g., if the SS selected from the SSlist is not configured for monitoring for the selected time slot), the UE proceeds to 370.

[0064] At 370, UE 204 can select the next SS from the SSlist and proceed to 375.

[0065] At 375, the UE can determine whether the SS is the last SS for that time slot.

[0066] Upon receiving a positive response at 377, the UE can proceed to 355.

[0067] Alternatively, in response to receiving a negative response at 379, the UE can proceed to 345.

[0068] After completion Figure 3 Following the process shown, the UE can have a mapping between which serving cell to monitor and which SS the UE should monitor in that time slot on a per-slot basis. This process can restart at point 315 if the activated / deactivated SS changes or if a criterion affecting monitoring priority is triggered.

[0069] Therefore, the above mechanism provides a time-domain adapted multi-carrier PDDCH monitoring mechanism.

[0070] Figure 4 The diagram illustrates a mechanism 400 for determining the timing of PDCCH monitoring, implemented according to an example.

[0071] exist Figure 4 The example implementation shown has three serving cells / CCs, each with multiple parameter sets configured for CA to determine the PDCCH monitoring timing. It should be noted that each serving cell configured for cross-carrier scheduling can define its SS monitoring mode and its priority.

[0072] exist Figure 4 In this configuration, a gNB (e.g., gNB 202) can be configured with three serving cells 420, such as Pcell 422, and two Scells (Scell#1 424 and Scell#2 426). Figure 4As shown, Pcell 422, Scell#1 424, and Scell#2 426 can be configured with subcarrier spacing (SCS) of 15kHz, 15kHz, and 30kHz, respectively. Additionally, Pcell 422, Scell#1 424, and Scell#2 426 can be configured with priorities 2, 4, and 3, with Scell#2 having the highest priority. These priorities establish a method for determining a specific / unique PDCCH monitoring mode on the configured serving cell, such that the UE only needs to monitor a single serving cell in a given time slot, as shown by 410 (412 for time slots with a 30kHz SCS, and 414 for time slots with a 15kHz SCS). The time grid number indicates the time slot number, where "D" indicates a downlink time slot, "U" indicates an uplink time slot, and "S" indicates a special time slot. In some implementations, priorities can be dynamically established or semi-statically configured (e.g., via RRC signaling), and a higher priority (e.g., priority 4 for Scell#2) can imply a higher priority for the SS monitoring PDCCH mode used for that serving cell. Additionally, Media Access Control (MAC) elements (CEs) such as MAC-CE or Downlink Control Information (DCIs) can be used to modify priorities or rules to determine priorities if these priorities have previously been configured by RRC. For example, different sets of Channel Quality Indicator (CQI) thresholds can be configured via RRC, allowing MAC-CE to switch between two CQI threshold sets based on the load in the cell.

[0073] In the example implementation, for simplicity, it is assumed that all SSs for each serving cell are configured with the same monitoring mode and semi-static priority. The PDCCH monitoring times configured by the network for each serving cell are shown in 470, while those not configured for monitoring are shown in 472. Furthermore, for Pcell, Scell#1, and Scell#2, the priorities associated with the serving cell are 2, 4, and 3, respectively, meaning that the Scell#1 monitoring mode has the highest priority, followed by Scell#2, and then Pcell.

[0074] In the example implementation, monitoring of the PDCCH timings for the different possible configurations of the three serving cells is shown in slot 480 (and slots not monitored by the UE are shown in slot 482). For example, when the UE is configured with Pcell+Scell#1+Scell#2, the UE will not monitor the Pcell for the PDCCH, and the Scell#1 / Scell#2 monitoring timings can be used for cross-scheduling of the Pcell and other Scells, i.e., Scell#2 or Scell#1.

[0075] In another example implementation, when the UE is configured with Pcell and Scell#2, the UE will not monitor Pcell for PDCCH, and the monitoring timing of Scell#2 can be used for cross-scheduling of Pcell.

[0076] Figure 5 The illustration shows an example implementation 500 for NR-unlicensed (NR-U) based on the example implementation.

[0077] In the example implementation, UE 204 can be configured with a CSS on the primary scheduling carrier 510, which can be configured with a licensed frequency (or licensed band). Furthermore, on this primary scheduling carrier, SS group 0 (SSG0) can be configured with type 3SS (as defined in the 3GPP specification), which has a Group Common PDCCH (GC-PDCCH) 1PDCCH candidate consuming 8 CCEs, and SS group 1 (SSG1) can be configured with a USS search space set, which has PDCCH candidates consuming 30 CCEs. The GC-PDCCH can carry at least Slot Format Related Information (SFI). This Slot Format Related Information is defined as information from which the UE can at least derive which symbols in the slot are DL, UL, and others.

[0078] On the secondary scheduling carrier 520 (which can be configured with unlicensed frequencies), SS group 0 (SSG0) can be configured with type 3SS, which has GC-PDCCH 1PDCCH candidates consuming 8 CCEs, and SS group 1 (SSG1) is configured with a USS search space set, which has PDCCH candidates consuming 30 CCEs.

[0079] like Figure 5 As shown, when the UE receives the GC-PDCCH in slot #4 on an unlicensed scheduled carrier, the UE can relinquish (indicated by the strikethrough) monitoring of SS group 1 on a licensed carrier, as shown by 530. This provides scheduling flexibility for the gNB without exceeding the CCE limit of 56 CCEs in the NR (per 15kHz and 30kHz slots).

[0080] Therefore, the proposed mechanism provides the UE with temporally orthogonal monitoring opportunities on Pcells and Scells, thus eliminating the UE's requirement to simultaneously attempt to decode several carriers from its perspective. From the perspective of NR device power savings and complexity, this mechanism is also beneficial, for example, enabling lighter NR devices to achieve higher capacity. From the network's perspective, the proposed mechanism enables flexible UE scheduling by allowing dynamic loading of PDSCH / PUSCH not only between Pcells and Scells but also dynamically loading PDCCH. The proposed temporal adaptive scheme also enables the network to offload control message scheduling. In other words, the proposed mechanism provides a low-complexity method for managing BD with low canonical workload in the target scenario.

[0081] Figure 6 This is a flowchart 600 illustrating the time-domain adaptive implementation of a multi-carrier PDDCH monitoring mechanism based on an example.

[0082] In the example implementation, at block 610, UE 204 can receive configuration information that configures one or more search space groups for each of a plurality of scheduled carriers. In some implementations, for example, the one or more search space groups may include at least a first search space group on a first carrier and at least a second search space group on a second carrier. In the example implementation, this configuration information can be received via RRC signaling.

[0083] At box 620, the UE can monitor at least the first search space group.

[0084] At box 630, the UE can detect whether the conditions for switching from the first search space group to the second search space group are met. In some implementations, for example, the switching conditions may include determining that the UE is not detecting a predefined signal or channel on the scheduled carrier during the measurement timing of the scheduled carrier, or determining that the UE is detecting or reporting a channel quality indicator below a threshold during the measurement timing of the scheduled carrier, or determining that the UE is detecting a radio link failure of the physical downlink control channel during the measurement timing of another scheduled carrier.

[0085] Additionally, in some implementations, for example, if the UE detects that the gNB is not transmitting a signal (e.g., due to a Listen-Before-Speak (LBT) failure), the UE can perform a handover.

[0086] At box 640, the UE can switch the monitoring from at least a first search space group to at least a second search space group. In some implementations, the UE can perform the switch in response to detecting that a condition has been met.

[0087] Therefore, the above mechanism provides time-domain adaptation for the multi-carrier PDDCH monitoring mechanism.

[0088] Figure 7 This is flowchart 700, illustrating the time-domain adaptive implementation of a multi-carrier PDDCH monitoring mechanism based on an example.

[0089] In the example implementation, at block 710, the gNB (e.g., gNB 202) may send configuration information to the user equipment (e.g., UE 204). In some implementations, for example, the configuration information sent by the gNB may include configuring one or more search space groups at the user equipment for each of a plurality of scheduled carriers. The one or more search space groups may include at least a first search space group on a first carrier and at least a second search space group on a second carrier.

[0090] At box 720, gNB can determine whether the conditions for switching from the first search space group to the second search space group are met.

[0091] At box 730, the gNB may send a physical downlink control channel to the user equipment in at least a second search space group on the second carrier.

[0092] Optionally, in some implementations, for example, the gNB can receive feedback from the user equipment. In some implementations, for example, the feedback may include ACK / NACK, etc. In some implementations, the gNB can determine whether the conditions for switching from the first search space group to the second search space group are met, at least in part, based on the feedback from the user equipment.

[0093] Therefore, the above mechanism provides time-domain adaptation for the multi-carrier PDDCH monitoring mechanism.

[0094] In some implementations, for example, the dropping of SS sets can occur at the scheduling cell level or the search space set level, depending, for example, on whether the priorities of different SSs within the same cell are set to the same or different. Additionally, in some implementations, for example, the SS sets of some second-priority cells can also be monitored.

[0095] This article describes additional example implementations.

[0096] Example 1. A method of communication, comprising: receiving configuration information by a user equipment, the configuration information configuring one or more search space groups for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier; monitoring at least the first search space group by the user equipment; detecting by the user equipment whether a condition for switching from the first search space group to the second search space group is met; and switching the monitoring from at least the first search space group to at least the second search space group by the user equipment in response to detecting that the condition is met.

[0097] Example 2. The method described in Example 1, wherein the configuration information is received via Radio Resource Control (RRC) signaling.

[0098] Example 3. The method according to any one of Examples 1-2, wherein the search space group in one or more search space groups includes multiple search spaces.

[0099] Example 4. The method according to any one of Examples 1-3, wherein the search space among the plurality of search spaces is a common search space or a user device-specific search space.

[0100] Example 5. The method according to any one of Examples 1-4, wherein the user equipment is scheduled on the first scheduling carrier and the second scheduling carrier using at least one of self-scheduling or cross-carrier scheduling, and wherein at least one of self-scheduling or cross-carrier scheduling includes one or more of the following: scheduling the first scheduling carrier via the first scheduling carrier; scheduling the first scheduling carrier via the second scheduling carrier; scheduling the second scheduling carrier via the second scheduling carrier; and scheduling the second scheduling carrier via the first scheduling carrier.

[0101] Example 6. The method according to any one of Examples 1-4, wherein the plurality of scheduling carriers includes a first scheduling carrier and at least two second scheduling carriers, wherein the user equipment is scheduled on the first scheduling carrier and at least two second scheduling carriers using at least one of self-scheduling or cross-carrier scheduling, and wherein at least one of self-scheduling or cross-carrier scheduling includes one or more of the following: scheduling the first scheduling carrier via the first scheduling carrier; scheduling the scheduling carriers of at least two second scheduling carriers using a scheduling carrier of at least two second scheduling carriers; scheduling the first scheduling carrier via one of the scheduling carriers of at least two second scheduling carriers; scheduling at least one of the scheduling carriers of at least two second scheduling carriers via the first scheduling carrier; and scheduling at least one of the scheduling carriers of at least two second scheduling carriers via another scheduling carrier of at least two second scheduling carriers.

[0102] Example 7. The method according to any one of Examples 1-6, wherein each of the plurality of scheduling carriers is configured with a corresponding search space monitoring mode and an associated priority.

[0103] Example 8. The method according to Example 7, wherein the search space monitoring mode includes physical downlink control channel monitoring timing.

[0104] Example 9. The method according to any one of Examples 1-8 further includes: determining the scheduling carriers to be used for monitoring based at least on the associated priorities of a plurality of scheduling carriers.

[0105] Example 10. The method according to any one of Examples 1-9, wherein monitoring is performed such that the blind decoding and / or control channel element limits are not exceeded.

[0106] Example 11. The method according to any one of Examples 1-10, wherein the condition includes one or more of the following: determining that the user equipment does not detect a predefined signal or channel on the scheduled carrier during the measurement timing of the scheduled carrier; determining that the user equipment is detecting or reporting a channel quality indicator below a threshold during the measurement timing of the scheduled carrier; and determining that the user equipment is detecting a radio link failure of the physical downlink control channel during the measurement timing of another scheduled carrier.

[0107] Example 12. The method according to any one of Examples 1-11, wherein: the user equipment is in a radio resource control (RRC) connection state, or the user equipment is configured with carrier aggregation, or a combination thereof.

[0108] Example 13. A method of communication, comprising: sending configuration information from a network node to a user equipment, the configuration information being used to configure one or more search space groups at the user equipment for each of a plurality of scheduled carriers, the one or more search space groups including at least a first search space group on a first carrier and at least a second search space group on a second carrier; determining whether conditions for switching from the first search space group to the second search space group are met; and sending a physical downlink control channel from the network node to the user equipment in at least the second search space group on the second carrier.

[0109] Example 14. The method according to Example 14, wherein the determination is performed based at least in part on feedback from the user device.

[0110] Example 15. An apparatus comprising: at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code being configured together with the at least one processor to cause the apparatus to perform at least the method according to any one of Examples 1-14.

[0111] Example 16. A non-transitory computer-readable storage medium including instructions stored thereon, which, when executed by at least one processor, are configured to cause a computing system to perform the method according to any one of Examples 1-14.

[0112] Figure 8 This is a block diagram of a wireless station (e.g., a user equipment (UE) / user equipment or AP / gNB / MgNB / SgNB) 800 implemented according to an example. The wireless station 800 may, for example, include one or more RF (radio frequency) or wireless transceivers 802A, 802B, wherein each wireless transceiver includes a transmitter for transmitting signals and a receiver for receiving signals. The wireless station also includes a processor or control unit / entity (controller) 804 / 806 for executing instructions or software and controlling the transmission and reception of signals; and a memory 808 for storing data and / or instructions.

[0113] Processor 804 can also make decisions or determinations, generate frames, packets, or messages for transmission, decode received frames or messages for further processing, and perform other tasks or functions described herein. Processor 804 (which may be a baseband processor) may, for example, generate messages, packets, frames, or other signals for transmission via wireless transceiver 802 (802A or 802B). Processor 804 can control the transmission of signals or messages on a wireless network and can control (e.g., after down-conversion by wireless transceiver 802) the reception of signals or messages via a wireless network. Processor 804 may be programmable and capable of executing software or other instructions stored in memory or other computer media to perform the various tasks and functions described above, such as one or more of the tasks or methods described above. Processor 804 may, for example, be (or may include) hardware, programmable logic, a programmable processor executing software or firmware, and / or any combination thereof. For example, using other terms, processor 804 and transceiver 802 together may be considered a wireless transmitter / receiver system.

[0114] Additionally, refer to Figure 8 The controller 806 (or processor 804) can execute software and instructions, providing overall control for station 800. Figure 8Other systems, not shown, provide control (such as controlling input / output devices (e.g., a display, a keyboard)) and / or can execute software for one or more applications available on the wireless station 800, such as, for example, an email program, an audio / video application, a word processor, a VoIP application, or other applications or software. Furthermore, a storage medium may be provided including stored instructions that, when executed by a controller or processor, can cause processor 804 or other controllers or processors to perform one or more of the functions or tasks described above.

[0115] According to another example implementation, the RF or wireless transceiver 802A / 802B can receive signals or data and / or transmit or send signals or data. The processor 804 (and possibly the transceiver 802A / 802B) can control the RF or wireless transceiver 802A or 802B to receive, transmit, broadcast, or send signals or data.

[0116] However, these aspects are not limited to the system given as an example, but those skilled in the art can apply this solution to other communication systems. Another example of a suitable communication system is the 5G concept. It is assumed that the network architecture in 5G will be very similar to that of advanced LTE. 5G may use multiple-input multiple-output (MIMO) antennas, far more base stations or nodes than LTE (the so-called small cell concept), including macro sites cooperating with even smaller base stations, and may also use various radio technologies to achieve better coverage and enhanced data rates.

[0117] It should be understood that future networks will most likely utilize Network Functions Virtualization (NFV), a network architecture concept that proposes virtualizing network node functions into "building blocks" or entities that can be operationally connected or linked together to provide services. Virtualized network functions (VNFs) can include one or more virtual machines that run computer program code using standard or general-purpose servers rather than custom hardware. Cloud computing or data storage devices can also be used. In radio communications, this could mean that node operations can be performed at least partially in servers, hosts, or nodes operatively coupled to a remote radio head. Node operations can also be distributed across multiple servers, nodes, or hosts. It should also be understood that the division of labor between core network operations and base station operations may differ from, or even not exist, in LTE.

[0118] Implementations of the various technologies described herein can be achieved using digital electronic circuits, or computer hardware, firmware, software, or combinations thereof. Implementations can be carried out as computer program products, i.e., computer programs tangibly embodied in an information carrier (e.g., in a machine-readable storage device or a propagated signal) for execution by or control of a data processing apparatus (e.g., a programmable processor, a computer, or multiple computers). Implementations can also be provided on a computer-readable medium or computer-readable storage medium, which may be a non-transitory medium. Implementations of the various technologies can also include implementations provided via transient signals or media, and / or program and / or software implementations downloadable via the Internet or other networks (wired and / or wireless networks). Additionally, implementations can be provided via machine-type communication (MTC) and via the Internet of Things (IoT).

[0119] Computer programs can take the form of source code, object code, or some intermediate form, and can be stored in a carrier, distribution medium, or computer-readable medium that can be any entity or device capable of carrying the program. Such carriers include, for example, recording media, computer memory, read-only memory, optoelectronic and / or electrical carrier signals, telecommunication signals, and software distribution packages. Depending on the required processing power, a computer program can be executed in a single electronic digital computer or distributed across multiple computers.

[0120] Furthermore, the various technologies described herein can be implemented using cyber-physical systems (CPS) (systems that integrate computational elements that control physical entities). CPS can realize and utilize a large number of interconnected ICT devices (sensors, actuators, processors, microcontrollers, etc.) embedded in physical objects in different locations. Mobile cyber-physical systems, where the physical systems involved have inherent mobility, are a subcategory of cyber-physical systems. Examples of mobile physical systems include mobile robots and electronic devices transported by humans or animals. The proliferation of smartphones has increased interest in the field of mobile cyber-physical systems. Therefore, various implementations of the technologies described herein can be provided via one or more of these technologies.

[0121] Computer programs, such as those described above, can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units or parts thereof adapted to a computing environment. Computer programs can be deployed to execute on one or more computers at a single site, or distributed across multiple sites and interconnected via a communication network.

[0122] The method steps can be executed by one or more programmable processors that execute a computer program or a portion thereof to perform a function by manipulating input data and generating output. The method steps can also be executed by special-purpose logic circuitry, and the apparatus can be implemented as special-purpose logic circuitry, such as an FPGA (Field-Programmable Gate Array) or an ASIC (Application-Specific Integrated Circuit).

[0123] For example, processors suitable for executing computer programs include both general-purpose microprocessors and special-purpose microprocessors, as well as any type of digital computer, chip, or chipset and any one or more processors. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. Computer components may include at least one processor for executing instructions and one or more storage devices for storing instructions and data. Typically, a computer may also include one or more mass storage devices, such as magnetic disks, magneto-optical disks, or optical disks, or be operatively coupled to one or more mass storage devices to receive data from or transfer data to one or more mass storage devices. Information carriers suitable for embodying computer program instructions and data include all forms of non-volatile memory, such as semiconductor memory devices, such as EPROMs, EEPROMs, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD-ROMs and DVD-ROMs. Processors and memory may be supplemented by or incorporated into special-purpose logic circuitry.

Claims

1. A method of communication, comprising: receiving, by a user equipment, configuration information configuring one or more search space groups for a primary cell and one or more secondary cells, the one or more search space groups comprising at least a first search space group and at least a second search space group, wherein each of the primary cell and the one or more secondary cells is configured with a corresponding search space monitoring pattern and an associated priority, wherein the search space monitoring pattern comprises physical downlink control channel monitoring occasions, and wherein at least based on the associated priority of the primary cell and the one or more secondary cells, a determination is made to monitor at least one of the primary cell and the one or more secondary cells; establishing, by the user equipment, a time grid based on a maximum subcarrier spacing of the primary cell and the one or more secondary cells, and mapping the search space monitoring pattern to the established time grid; monitoring, by the user equipment, at least the first search space group, wherein the monitoring is performed such that a blind decoding and / or control channel element limit is not exceeded; detecting, by the user equipment, whether a condition is met to switch from the first search space group to the second search space group; and in response to detecting that the condition is met, switching, by the user equipment, the monitoring from the at least first search space group to the at least second search space group. the condition comprises one or more of:

2. The method of claim 1, wherein, a determination that the user equipment does not detect a predefined signal or channel on a scheduling cell during a measurement occasion of a scheduled cell; a determination that the user equipment is detecting or reporting a channel quality indicator below a threshold during a measurement occasion of the scheduled cell; and a determination that the user equipment is detecting a radio link failure of a physical downlink control channel during a measurement occasion of another scheduled cell.

3. The method of claim 1, wherein: the user equipment is in a radio resource control (RRC) connected state, or the user equipment is configured with carrier aggregation, or a combination thereof.

4. An apparatus for communication, comprising: at least one processor; and at least one memory including instructions, the at least one memory including the instructions is configured to, with the at least one processor, cause the apparatus at least to: receive configuration information configuring one or more search space groups for a primary cell and one or more secondary cells, the one or more search space groups comprising at least a first search space group and at least a second search space group, wherein each of the primary cell and the one or more secondary cells is configured with a corresponding search space monitoring pattern and an associated priority, wherein the search space monitoring pattern comprises physical downlink control channel monitoring occasions, and wherein at least based on the associated priority of the primary cell and the one or more secondary cells, a determination is made to monitor at least one of the primary cell and the one or more secondary cells; ​ ​ establish a time grid based on a maximum subcarrier spacing among the primary cell and the one or more secondary cells, and map the search space monitoring patterns to the established time grid; monitor at least the first search space group, wherein the monitoring is performed such that a blind decoding and / or control channel element limit is not exceeded; detect whether a condition for switching from the first search space group to the second search space group is met; and in response to detecting that the condition is met, switch the monitoring from the at least first search space group to the at least second search space group.

5. The apparatus of claim 4, wherein, the condition comprises one or more of: a predefined signal or channel is not detected on a scheduling cell during a measurement occasion of a scheduled cell; determine whether a channel quality indicator is below a threshold during a measurement occasion of the scheduled cell; and a radio link failure of a physical downlink control channel is detected during a measurement occasion of another scheduled cell.

6. The apparatus of claim 4, wherein: the apparatus is in a radio resource control (RRC) connected state, or the apparatus is configured with carrier aggregation, or a combination thereof.

7. A non-transitory computer-readable storage medium comprising instructions stored thereon that, when executed by at least one processor, are configured to cause an apparatus to: receive configuration information configuring one or more search space groups for a primary cell and one or more secondary cells, the one or more search space groups comprising at least a first search space group and at least a second search space group, wherein each of the primary cell and the one or more secondary cells is configured with a corresponding search space monitoring pattern and an associated priority, wherein the search space monitoring pattern comprises physical downlink control channel monitoring occasions, and wherein at least based on the associated priorities of the primary cell and the one or more secondary cells, at least one of the primary cell and the one or more secondary cells is determined to be monitored; establish a time grid based on a maximum subcarrier spacing among the primary cell and the one or more secondary cells, and map the search space monitoring patterns to the established time grid; monitor at least the first search space group, wherein the monitoring is performed such that a blind decoding and / or control channel element limit is not exceeded; detect whether a condition for switching from the first search space group to the second search space group is met; and in response to detecting that the condition is met, switch the monitoring from the at least first search space group to the at least second search space group. the condition comprises one or more of:

8. The non-transitory computer-readable storage medium of claim 7, wherein, a predefined signal or channel is not detected on a scheduling cell during a measurement occasion of a scheduled cell; determine whether a channel quality indicator is below a threshold during a measurement occasion of the scheduled cell; and a radio link failure of a physical downlink control channel is detected during a measurement occasion of another scheduled cell.

9. The non-transitory computer-readable storage medium of claim 7, wherein: the apparatus is in a radio resource control (RRC) connected state, or the apparatus is configured with carrier aggregation, or a combination thereof. The apparatus is configured with carrier aggregation, or Combinations of the above.

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