Channel State Information Reporting in Low-Power Wake-up Radio Communication

Abstract

Various aspects of this disclosure relate to a user equipment (UE) for wireless communication. The UE includes: a transceiver comprising a main radio and a low-power wake-up radio; at least one memory; and at least one processor coupled to the transceiver and the at least one memory. The at least one processor is configured to cause the UE to initiate monitoring of a low-power wake-up signal in a downlink from a network equipment using the low-power radio in response to configuring the use of the low-power wake-up radio of the transceiver. The UE receives a wake-up indication within the LP-WUS. The UE is configured to identify from the wake-up indication whether the main radio (MR) needs to be woken up, and from the LP-WUS whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations.

Description

[0001] Priority Claim

[0002] This application claims priority to U.S. Patent Application No. 18 / 932,485, filed October 30, 2024, which claims priority to U.S. Provisional Application No. 63 / 595,330, filed November 1, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to wireless communication, and more specifically to channel state information reporting that supports wireless communication. Background Technology

[0004] A wireless communication system may include one or more network communication devices, such as base stations, that support wireless communication for one or more user communication devices, also referred to as user equipment (UE) or other suitable terms. The wireless communication system can support wireless communication with one or more user communication devices by utilizing the resources of the wireless communication system, including time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers, etc.). Furthermore, the wireless communication system can support wireless communication across various radio access technologies, such as third-generation (3G), fourth-generation (4G), fifth-generation (5G), and other suitable radio access technologies other than 5G (e.g., sixth-generation (6G)). Summary of the Invention

[0005] Some embodiments of the methods and apparatus described herein may include performing wireless communication at a user equipment (UE) that reduces the timing of Channel State Information (CSI) reports while using a Low Power Wake-up Radio (LP-WUR) to conserve device power. The reduction in CSI reports does not necessarily eliminate all opportunities for CSI reporting in order to preserve the benefits of successful wireless communication coverage for the UE. The UE has a transceiver comprising a main radio and a low-power radio, and at least one memory. The UE includes at least one processor coupled to the transceiver and at least one memory. The at least one processor is configured to enable the UE to initiate monitoring of a low-power wake-up signal using the low-power radio within the downlink from network equipment in response to configuring the low-power radio as the LP-WUR of the transceiver. The UE's transceiver receives configuration of at least one channel state information transmission condition from the UE. In response to identifying that the channel state information transmission condition is not met, the at least one processor configures the UE to continue monitoring for a low-power wake-up signal within the downlink using the low-power radio without waking up the main radio.

[0006] In some embodiments of the methods and apparatus described herein, the network equipment supports wireless communication at a UE, which reduces the frequency of CSI reporting to conserve power while using LP-WUR. The network equipment connects to the UE via a transceiver, which has a low-power wake-up radio and a primary radio. The network equipment configures the UE to use the low-power radio to monitor for low-power wake-up signals to wake the primary radio. The network equipment receives UE auxiliary information associated with the UE, which may include one or more of stored power, mobility rate, and power coverage. The network equipment compares the UE auxiliary information with one or more corresponding criterion thresholds of at least one criterion to determine whether the UE meets at least one criterion for reducing channel state information reporting. The network equipment configures at least one channel state information transmission condition for the UE.

[0007] As used herein, the article “a” preceding an element is not limited and should be understood to refer to “at least one” or “one or more” of those elements. The terms “a,” “at least one,” “one or more,” and “at least one of one or more” are interchangeable. As used herein, the word “or” included in the claims, as used in a list of items (e.g., a list of items beginning with phrases such as “at least one,” “one or more,” or “one or two”), indicates an inclusive list such that a list of at least one of, for example, A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase “based on” should not be construed as referring to a closed set of conditions. For example, without departing from the scope of this disclosure, an example step described as “based on condition A” may be based on both condition A and condition B. In other words, as used herein, the phrase “based on” should be interpreted in the same manner as the phrase “at least partially based on.” Furthermore, as used herein, included in the claims, “group” may comprise one or more elements. Attached Figure Description

[0008] Figure 1 Examples of wireless communication systems according to aspects of this disclosure are described.

[0009] Figure 2 It is a timing diagram of the periodic reporting of reduced reporting of channel state information in low-power wake-up radio (LP-WUR) mode according to aspects of this disclosure.

[0010] Figure 3 It is a timing diagram of a non-periodic reporting of channel state information with LP-WUR mode reduced reporting according to aspects of this disclosure.

[0011] Figure 4It is a timing diagram of a semi-persistent report of reduced reporting of channel state information with LP-WUR mode according to aspects of this disclosure.

[0012] Figure 5 Example syntax 1.1 of downlink control information presenting new parameters of the LP-WUR mode incorporated according to aspects of this disclosure for power saving (DCP) information elements.

[0013] Figure 6 It is an instance syntax 1.2 of the new information element of the LP-WUR pattern according to aspects of this disclosure.

[0014] Figure 7 This is a diagram of communication activities reported by the main radio and low-power radio of a UE configured for LP-WUR mode, according to aspects of this disclosure, using Channel State Information (CSI) reports.

[0015] Figures 8A to 8H (collectively referred to as “Figure 8”) is a syntax 3.1 that introduces new Radio Resource Control (RRC) parameters to limit the transmission frequencies of periodic CSI reports in accordance with aspects of this disclosure.

[0016] Figure 9 Example syntax 4.1 presents an RRC connection mode containing optional Boolean parameters for controlling the LP-WUR mode, according to aspects of this disclosure.

[0017] Figures 10A to 10C (collectively referred to as “Figure 10”) presents an example syntax 5.1 of information elements that, in addition to physical downlink control channel (PDCCH) monitoring / skipping information, also carry explicit CSI report information according to aspects of this disclosure.

[0018] Figure 11 Examples of user equipment (UE) according to aspects of this disclosure are described.

[0019] Figure 12 Examples of processors according to aspects of this disclosure are described.

[0020] Figure 13 Examples of network equipment (NE) according to aspects of this disclosure are described.

[0021] Figure 14 A flowchart illustrating a method performed by a UE according to aspects of this disclosure.

[0022] Figure 15 A flowchart illustrating the method performed by NE according to aspects of this disclosure. Detailed Implementation

[0023] Channel state information (CSI) is reported by the receiving device (e.g., user equipment (UE)) so that the transmitting device (e.g., network entity (NE)) can adjust the transmission parameters to compensate for atmospheric propagation conditions in order to achieve successful communication with the receiving device.

[0024] There is an interest in further defining the air interface of the current 5G New Radio (NR) telecommunications standard to address Low Power Wake-up Signal (LP WUS). Specifically, there is a primary need for further definition of LP WUS and Low Power Wake-up Radio (LR) for power-sensitive, small form factor devices, including Internet of Things (IoT) use cases (e.g., industrial sensors, controllers) and wearable devices. Other use cases (e.g., extended reality (XR) devices, smart glasses, and smartphones) are not excluded.

[0025] Currently, a primary radio (MR) in the UE is responsible for obtaining service from the serving radio network (gNB). For the anticipated design of the new LP-WUR, the UE should offload some of its MR functionality from the MR to the LR to save power. The LR uses a newly designed low-power signal, also known as the Low Power Wake-up Signal (LP-WUS), giving it the advantage of low power consumption, but at the cost of reduced LR coverage compared to the MR's coverage range.

[0026] Currently, UEs report CSI measurements in the uplink (UL) to provide the network with information about the channel measured by the UE. Typically, for UEs supporting LR, a wake-up MR is required for any UL transmission. This continuous reporting of CSI measurements can negatively impact the power-saving gains of using LR when LR is configured and LP-WUS is activated or enabled, as the MR needs to be woken up every time a report is required.

[0027] In addition, when RRC Connectivity Mode Discontinuous Receive (DRX) is configured, the UE also transmits a CSI report under the following conditions:

[0028] (i) If a long DRX cycle is used for a DRX group, and [(system frame number (SFN) × 10) + subframe number] modulo (drx - LongCycle) = drx - StartOffset;

[0029] (ii) If the downlink control information (DCI) format 2_6 with cyclic redundancy check (CRC) scrambled by the power saving radio network temporary identifier (PS-RNTI) downlink control information for power saving (DCP) monitoring is configured for the active downlink (DL) bandwidth portion (BWP);

[0030] (iii) If the drx-onDurationTimer is started according to the DCP indication associated with the current DRX cycle received from the lower layer; or if all DCP timings in the time domain associated with the current DRX cycle take into account authorizations, assignments, DRX command MAC CEs sent up to 4 ms before the start of the last DCP timing during the active time, or during measurement gaps, or when the MAC entity monitors physical downlink control channel (PDCCH) transmissions in the search space indicated by the "recoverySearchSpaceId" of the special cell (SpCell) identified by the Cell Radio Network Temporary Identifier (C-RNTI) when the "ra-ResponseWindow" is running; or if "ps-Wakeup" is configured with a truth value and no DCP indication associated with the current DRX cycle has been received from the lower layer.

[0031] (iv) Start "drx-onDurationTimer" after "drx-SlotOffset" from the beginning of the subframe.

[0032] Alternatively, the UE also transmits a CSI report under the following conditions:

[0033] (i) If DCP monitoring is configured as specified for the active DL-BWP; and if the current symbol n appears within the duration of “drx-onDurationTimer”; and

[0034] If the drx-onDurationTimer associated with the current DRX cycle is not started as specified;

[0035] (ii) If, when evaluating all DRX activity time conditions as specified, the MAC entity is not active during the activity time period, considering authorizations, assignments, DRX command MAC CEs transmitted up to 4 ms before symbol n, received long DRX command MAC CEs, and scheduling requests; and if “allowCSI-SRS-Tx-MulticastDRX-Active” is not configured, or if “cfr-ConfigMulticast” is not configured for any of the active BWPs of the serving cell, or if, when evaluating all DRX activity time conditions as specified, all multicast DRXs are not active during the activity time period, considering multicast assignments received up to 4 ms before symbol n, multicast-broadcast service (MBS) multicast DRX command MAC CEs, and all multicast sessions are configured with multicast DRX, then:

[0036] (iii)(a) Do not transmit the defined periodic sounding reference signal (SRS) and semi-persistent SRS; (b) Do not report semi-persistent CSI configured on the Physical Uplink Shared Channel (PUSCH); and

[0037] (iv) If "ps-TransmitPeriodic L1-RSRP" is not configured with a true value, then: periodic CSIs for L1-RSRP will not be reported on the Physical Uplink Control Channel (PUCCH); and

[0038] (v) If “ps-TransmitOtherPeriodicCSI” is not configured with a true value, then periodic CSIs that are not L1-RSRP will not be reported on PUCCH.

[0039] As discussed above, if either the optional parameter "ps-TransmitPeriodicL1-RSRP" or "ps-TransmitOtherPeriodicCSI" is set to 'true' when configuring DCP for a UE, the UE will report the corresponding CSI information regardless of whether it is in DRX active time. This will reduce the power saving gain of using LR during configuration. Therefore, when configuring LR for a UE and activating or enabling LP-WUS to replace DCP in RRC_CONNECTED mode, enhancements to limit or constrain CSI reporting are needed. Furthermore, when LP-WUS monitoring is enabled to prevent frequent wake-ups by MR, enhancements to other types of CSI reporting are required.

[0040] One existing technical solution is to replicate CSI reporting as is conventional when the LR is configured and LP-WUS monitoring is activated / enabled in RRC_CONNECTED mode. For example, periodic CSI reporting is activated / deactivated by the network when LP-WUS is activated in RRC_CONNECTED mode by setting the parameters ps-TransmitPeriodicL1-RSRP and / or ps-TransmitOtherPeriodicCSI to 'true' or 'false' values, respectively. While this may be easy to implement, it has some drawbacks that may reduce the power savings provided by the LR. Even if the MR may not need to monitor the PDCCH (i.e., wake-up for DL ​​reception), the MR still needs to wake up frequently to transmit CSI reports. Therefore, this disclosure provides the necessary enhancements to the CSI reporting mechanism in the UE when the UE is configured to actively monitor LP-WUS.

[0041] The aspects of this disclosure are described in the context of a wireless communication system. This disclosure enhances the CSI reporting mechanism in the UE when the UE is configured to actively monitor LP-WUS. In one embodiment, when LP-WUS is activated, CSI reporting can be paused by deactivating CSI reporting within a DCP configuration information element (“DCP-Config IE”). As another example, CSI reporting can be paused by defining a new LP-WUS configuration information element (“LPWUS-Config IE”) where CSI reporting parameters are no longer required.

[0042] In one embodiment, this disclosure provides a new time threshold that can be configured by the network on top of a periodicity defined in a CSI report configuration information element (“ReportConfig IE”) to constrain the frequency of CSI reporting when LP-WUS monitoring is activated or enabled. As an example, the new time threshold may be implemented as one of a timer for issuing, a timer for disabling, or as a new parameter within the ReportConfig IE.

[0043] In another embodiment, this disclosure provides a method to indicate the skipping of CSI reporting timing within the LP-WUS signal, allowing for an increase in the MR's sleep time. As an example, the method can be implemented by introducing two bits within the LP-WUS signal to indicate the duration of the CSI reporting skip.

[0044] Figure 1 This section describes an example of a wireless communication system 100 according to aspects of this disclosure. The wireless communication system 100 may include one or more network entities (NEs) 102, one or more user equipment (UEs) 104, and a core network (CN) 106. The wireless communication system 100 may support various radio access technologies. In some embodiments, the wireless communication system 100 may be a fourth-generation (4G) network, such as an LTE network or an LTE-A network. In some other embodiments, the wireless communication system 100 may be a new radio (NR) network, such as a fifth-generation (5G) network, a 5G-A network, or a 5G ultra-wideband (5G-UWB) network. In other embodiments, the wireless communication system 100 may be a combination of 4G and 5G networks, or other suitable radio access technologies, including IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20. The wireless communication system 100 can support radio access technologies other than 5G, such as 6G. In addition, the wireless communication system 100 can support different technologies such as Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), or Code Division Multiple Access (CDMA).

[0045] One or more NEs 102 may be distributed across a geographical area to form a wireless communication system 100. One or more of the NEs 102 described herein may be, or may include, or may be referred to as a network node, base station, network element, network function, network equipment, network entity, radio access network (RAN), NodeB, eNodeB (eNB), next-generation NodeB (gNB), or other suitable terms. NEs 102 and UEs 104 may communicate via a communication link, which may be a wireless or wired connection. For example, NEs 102 and UEs 104 may perform wireless communication (e.g., receive signaling, transmit signaling) via a Uu interface.

[0046] NE 102 can provide a geographic coverage area that supports services for one or more UEs 104 within that geographic coverage area. For example, NE 102 and UE 104 can support wireless communication of signals associated with services (e.g., voice, video, packet data, messaging, broadcasting, etc.) based on one or more radio access technologies. In some embodiments, NE 102 can be mobile, for example, a satellite associated with a non-terrestrial network (NTN). In some embodiments, different geographic coverage areas 112 associated with the same or different radio access technologies can overlap, but different geographic coverage areas can be associated with different NEs 102.

[0047] One or more UEs 104 may be distributed across a geographical area of ​​the wireless communication system 100. UE 104 may include or be referred to as a remote unit, mobile device, wireless device, remote device, subscriber device, transmitter device, receiver device, or some other suitable term. In some implementations, UE 104 may be referred to as a unit, station, terminal, or client, and other instances thereof. Alternatively, UE 104 may be referred to as an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a Machine Type Communication (MTC) device, and other instances thereof.

[0048] UE 104 may be able to support direct wireless communication with other UE 104 via a communication link. For example, UE 104 may support direct wireless communication with another UE 104 via a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, communication link 114 may be referred to as a side link. For example, UE 104 may support direct wireless communication with another UE 104 via a PC5 interface.

[0049] NE 102 may support communication with CN 106 or with another NE 102 or both. For example, NE 102 may interface with other NE 102 or CN 106 via one or more backhaul links (e.g., S1, N2, N2, or network interfaces). In some embodiments, NE 102 may communicate directly with each other. In some other embodiments, NE 102 may communicate with each other or indirectly (e.g., via CN 106). In some embodiments, one or more NE 102 may include sub-components, such as access network entities, which may be instances of access node controllers (ANCs). The ANC may communicate with one or more UE 104s via one or more other access network transmitting entities (which may be referred to as radio heads, smart radio heads, or transmit-receive points (TRPs)).

[0050] CN 106 can support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. CN 106 can be an evolved packet core (EPC) or a 5G core (5GC), which may include control plane entities that manage access and mobility (e.g., a mobility management entity (MME) and / or access and mobility management functions (AMF)) and user plane entities that route or interconnect packets to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). In some implementations, the control plane entities may manage non-access stratum (NAS) functions of one or more UEs 104 served by one or more NEs 102 associated with CN 106, such as mobility, authentication, and bearer management (e.g., data bearers, signaling bearers, etc.).

[0051] CN 106 can communicate with the packet data network via one or more backhaul links (e.g., via S1, N2, N2, or another network interface). The packet data network may contain an application server. In some implementations, one or more UEs 104 can communicate with the application server. UE 104 can establish a session (e.g., a Protocol Data Unit (PDU) session, etc.) with CN 106 via NE 102. CN 106 can use the established session (e.g., an established PDU session) to route services (e.g., control information, data, etc.) between UE 104 and the application server. A PDU session may be an instance of a logical connection between UE 104 and CN 106 (e.g., one or more network functions of CN 106).

[0052] In the wireless communication system 100, NE 102 and UE 104 can use the resources of the wireless communication system 100, including time resources (e.g., symbols, time slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers) to perform various operations (e.g., wireless communication). In some embodiments, NE 102 and UE 104 can support different resource structures. For example, NE 102 and UE 104 can support different frame structures. In some embodiments, such as in 4G, NE 102 and UE 104 can support a single frame structure. In some other embodiments, such as in 5G and other suitable radio access technologies, NE 102 and UE 104 can support various frame structures (i.e., multiple frame structures). NE 102 and UE 104 can support various frame structures based on one or more parameter sets.

[0053] The wireless communication system 100 may support one or more parameter sets, and the parameter sets may include subcarrier spacing and cyclic prefixes. A first parameter set (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a regular cyclic prefix. In some embodiments, the first parameter set (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one time slot per subframe. A second parameter set (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a regular cyclic prefix. A third parameter set (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a regular cyclic prefix or an extended cyclic prefix. A fourth parameter set (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a regular cyclic prefix. A fifth parameter set (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a regular cyclic prefix.

[0054] Time intervals for resources (e.g., communication resources) can be organized according to frames (also known as radio frames). Each frame may have a duration, for example, 10 milliseconds (ms). In some embodiments, each frame may contain multiple subframes. For example, each frame may contain 10 subframes, and each subframe may have a duration, for example, 1 ms. In some embodiments, each frame may have the same duration. In some embodiments, each subframe of a frame may have the same duration.

[0055] Alternatively, the time intervals of resources (e.g., communication resources) can be organized according to time slots. For example, a subframe may contain a certain number (e.g., quantity) of time slots. The number of time slots in each subframe may also depend on one or more parameter sets supported in the wireless communication system 100. For example, the first, second, third, fourth, and fifth parameter sets (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with corresponding subcarrier intervals of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single time slot per subframe, two time slots per subframe, four time slots per subframe, eight time slots per subframe, and 16 time slots per subframe, respectively. Each time slot may contain a certain number (e.g., quantity) of symbols (e.g., OFDM symbols). In some embodiments, the number (e.g., quantity) of time slots in a subframe may depend on the parameter set. For a conventional cyclic prefix, a time slot may contain 14 symbols. For an extended cyclic prefix (e.g., applicable to a 60 kHz subcarrier spacing), a time slot may contain 12 symbols. The relationship between the number of symbols per time slot for the regular cyclic prefix and the extended cyclic prefix, the number of time slots per subframe, and the number of time slots per frame may depend on the parameter set. It should be understood that references to the first parameter set (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and time slots.

[0056] In the wireless communication system 100, the electromagnetic (EM) spectrum can be divided into various categories, frequency bands, channels, etc., based on frequency or wavelength. For example, the wireless communication system 100 may support one or more operating frequency bands, such as frequency range names FR1 (410 MHz to 7.125 GHz), FR2 (24.25 GHz to 52.6 GHz), FR3 (7.125 GHz to 24.25 GHz), FR4 (52.6 GHz to 114.25 GHz), FR4a or FR4-1 (52.6 GHz to 71 GHz), and FR5 (114.25 GHz to 300 GHz). In some embodiments, NE 102 and UE 104 may perform wireless communication on one or more of the operating frequency bands. In some embodiments, FR1 may be used by NE 102 and UE 104, as well as other equipment or devices, for cellular communication services (e.g., control information, data). In some implementations, FR2 can be used by NE 102 and UE 104, as well as other equipment or devices, for short-range, high data rate capabilities.

[0057] FR1 may be associated with one or more parameter sets (e.g., at least three parameter sets). For example, FR1 may be associated with a first parameter set containing a 15 kHz subcarrier spacing (e.g., μ=0); a second parameter set containing a 30 kHz subcarrier spacing (e.g., μ=1); and a third parameter set containing a 60 kHz subcarrier spacing (e.g., μ=2). FR2 may be associated with one or more parameter sets (e.g., at least two parameter sets). For example, FR2 may be associated with a third parameter set containing a 60 kHz subcarrier spacing (e.g., μ=2); and a fourth parameter set containing a 120 kHz subcarrier spacing (e.g., μ=3).

[0058] Figures 2 to 4 This disclosure describes how reducing channel state information reports, according to aspects of this disclosure, is used to implement LP-WUS to increase power savings at the UE, while continuing to support sufficient CSI reports for successful communication in the three different types of reports respectively. Figure 2 This is a timing diagram of the periodic reporting of reduced channel state information in Low Power Wake-up Radio (LP-WUR) mode according to aspects of this disclosure. The network (NW) transmits higher-layer (e.g., RRC) configurations to the UE instead of lower-layer triggers. The NW transmits a CSI-related reference signal. The UE transmits a CSI report. The transmission of the CSI-related reference signal and the CSI report is based on a periodic scheduling by the NW that allows it to be skipped for power savings at the UE.

[0059] Figure 3 This is a timing diagram of aperiodic reporting of channel state information with LP-WUR mode, according to aspects of this disclosure. The NNW transmits higher-layer (e.g., RRC) configurations to the UE. The NW transmits lower-layer triggers to the UE, such as MAC CE or DCI. The NW transmits CSI-related reference signals aperiodically in time slot X. The UE transmits CSI reports in time slot Y. The transmission of CSI-related reference signals and CSI reports is based on NW prompts, allowing it to be skipped for power-saving aperiodic scheduling at the UE.

[0060] Figure 3 This is a timing diagram of a semi-persistent reporting method with reduced channel state information reporting in LP-WUR mode according to aspects of this disclosure. The NW transmits a higher-layer (e.g., RRC) configuration to the UE. The NW transmits a lower-layer trigger, such as MAC CE, to the UE. The NW transmits a CSI-related reference signal. After a periodic interruption, the NW can similarly initiate another series of semi-persistent periodic CSI reports. The NW can allow certain moments of the semi-persistent periodic CSI reports to be skipped for power savings at the UE.

[0061] This document provides various embodiments of the present disclosure, each presenting a different process or method for reducing CSI reporting and also reducing the need to wake up MRs to support CSI reporting. In a first embodiment, referred to as Embodiment 1, a new LP-WUS configuration is provided.

[0062] For Example 1, LP-WUS monitoring is enabled to replace the traditional DCP signal, and LP-WUS is used to indicate whether the MR needs to wake up and monitor the PDCCH in the next DRX onDuration cycle. For this implementation (i.e., where LP-WUS replaces the traditional DCP functionality and DRX is configured in RRC_CONNECTED mode), a new LP-WUS configuration is provided to define the LP-WUS signal. Figure 5 The document describes an exemplary syntax for including new parameters within a traditional DCP IE, and... Figure 6 This demonstrates another exemplary syntax of the new LP-WUS IE.

[0063] Figure 5 Example syntax 1.1 is a DCP information element that incorporates a new parameter into the LP-WUS mode. In one implementation, the LP-WUS configuration can be mentioned as a new parameter within a traditional DCP information element (as shown in syntax 1.1). This new parameter can take either the enumerated value 'true' or 'false', indicating whether LP-WUS monitoring is enabled or disabled, respectively. When this parameter is 'true', optional parameters for CSI reporting can always be set to 'false', or these optional parameters can be ignored by the UE (i.e., the UE does not report periodic CSI on the PUCCH regardless of whether the ps-TransmitPeriodicL1-RSRP and / or ps-TransmitOtherPeriodicCSI parameters are set to 'true'). Therefore, LP-WUS activation is considered an implicit indication of disabling / suspending periodic CSI reporting on the PUCCH. When the LP-WUS signal is deactivated (i.e., traditional DCP is used to wake up the MR in the next DRX activity time), the traditional procedure for reporting periodic CSI on the PUCCH can be resumed.

[0064] Figure 6 Syntax 1.2 is an example of a new information element in the LP-WUS mode. In yet another implementation, the LP-WUS configuration itself can be a new information element (e.g., LPWUS-Config-r19, as shown in Syntax 1.2). For this implementation, CSI reporting can be constrained by the optional parameter of not including CSI reporting in the new configuration. The traditional procedure of reporting periodic CSI on the PUCCH can be resumed when the LP-WUS signal is deactivated (i.e., the conventional DCP is used to wake up the MR in the next DRX activity time).

[0065] By utilizing Figure 5 and 6 The two example syntaxes described indicate that if the LP-WUS signal indicates that the UE does not need to be woken up during the next DRX activity period, then the MR can continue to sleep.

[0066] The second embodiment of this disclosure combines a CSI report with LP-WUS. Figure 7 This is a diagram of communication activity involving Channel State Information (CSI) reporting by the primary radio and low-power radio of a UE configured for LP-WUR mode, according to aspects of this disclosure. This second embodiment relates to altering the behavior of periodic CSI reporting on the PUCCH when LR is configured and LP-WUS is activated to replace the DCP signal, such that when this monitoring is activated or enabled, the periodic CSI reporting on the PUCCH is combined with the LP-WUS indication. When LP-WUS is used to notify the UE whether it needs to wake up in the next DRX activity period, LP-WUS can be used as an implicit indication of whether CSI reporting needs to be completed, provided that the ps-TransmitPeriodicL1-RSRP and / or ps-TransmitOtherPeriodicCSI parameters are set to 'true'. That is, when the ps-TransmitPeriodicL1-RSRP and / or ps-TransmitOtherPeriodicCSI parameters are set to 'true', if the LP-WUS signal indicates a wake-up in the next DRX activity period, then the UE only reports the corresponding CSI report on the PUCCH. If these optional parameters are set to 'false' values, then the UE follows traditional behavior and will not report periodic CSI reports on the PUCCH if the next DRX onDuration will not be in the active period.

[0067] The third embodiment provides restricted reporting of periodic CSI on the PUCCH. In normal applications, periodic CSI reporting on the PUCCH can be configured to be reported at a frequency of every 2 ms. If the MR needs to frequently wake up for this reporting, this can significantly reduce the power saving gain of the LR. In this third embodiment, the UE is configured with a new time threshold (i.e., a time threshold specific to when LP-WUS is enabled / activated) that will be used on top of the periodicity set for CSI reporting when using a conventional DCP. This new time threshold can be based on the UE's mobility state, power saving requirements, LR coverage, and / or a combination of two or all of these factors to constrain the periodic reporting of CSI on the PUCCH. Therefore, if the LR is configured for the UE and LP-WUS is activated to replace the DCP in the connection mode DRX, the UE will not report periodic CSI on the PUCCH even when the ps-TransmitPeriodicL1-RSRP and / or ps-TransmitOtherPeriodicCSI parameters are set to 'true', until and unless this time threshold is exceeded. The time threshold is configured by the network and is restarted once a CSI report has been transmitted.

[0068] In one implementation, the timer is maintained until a CSI report is transmitted. For this implementation, the timer is configured by the network based on, for example, the UE's mobility state, the UE's power-saving requirements, the LR's coverage area, and / or a combination of both or all of these criteria. The timer starts after a periodic CSI report is transmitted on the PUCCH, and upon the timer's expiration, the next periodic CSI report on the PUCCH is transmitted. The timer can be configured via RRC or maintained by the MAC layer.

[0069] In another implementation, the timer may be maintained as a disabled timer. As a disabled timer, the timer is configured by the network based on, for example, the UE's mobility state, the UE's power-saving requirements, the LR's coverage area, and / or a combination of two or more of these criteria. The timer starts when periodic CSI reports are transmitted on the PUCCH. While the timer is running, periodic CSI reports are not transmitted via the PUCCH. Once the timer expires, the UE may again transmit periodic CSI reports on the PUCCH, provided that such reports are available.

[0070] In another embodiment of the third embodiment, a new RRC parameter 'timeRestrictionForMeasurementReporting' is introduced to limit the frequency of transmitting periodic CSI reports via PUCCH. When this parameter is configured, it indicates a timer value (e.g., t1, t2, t3, or t4) that indicates how long the UE must wait before reporting the next periodic CSI report on the PUCCH. The timer value can be selected by the network based on the UE's mobility state, the UE's power saving requirements, the coverage of the LR, and / or a combination of two or all of these factors. Figures 8A to 8H (Collectively referred to as “Figure 8”) presents an example syntax 3.1 of the introduction of new RRC parameters to limit the transmission frequency of periodic CSI reports according to aspects of this disclosure.

[0071] The fourth embodiment of this disclosure includes the use of LP-WUS in conjunction with DCP. According to the fourth embodiment, another way to use LP-WUS when configuring connectivity mode DRX is by configuring the LP-WUS signal to be used in conjunction with the legacy DCP signal. When the LP-WUS signal is enabled for use in conjunction with legacy DCP, the UE monitors LP-WUS, which indicates whether the UE should subsequently monitor legacy DCP in the next DCP monitoring opportunity. For this implementation, CSI reporting may still need to be constrained to maximize the power saving gain provided by LR.

[0072] Figure 9 Example syntax 4.1 provides an RRC connection mode including optional Boolean parameters controlling the LP-WUS mode according to aspects of this disclosure. In this fourth embodiment, one solution is to set the optional parameters to 'false' Boolean values ​​when LP-WUS monitoring is enabled in RRC_CONNECTED mode, as depicted in syntax 4.1. When these parameters are set to false, the UE does not report any periodic CSI reports on the PUCCH if the DCP signal does not instruct the UE to monitor the PDCCH during the next DRX onDuration. In this way, if the DCP signal indicates that the UE does not need to be woken up during the next DRX activity period, the MR can continue to sleep.

[0073] In one enhancement, periodic CSI reporting on the PUCCH can also be combined with an LP-WUS wake-up indication. That is, when the LP-WUS indicates that the UE must begin monitoring the DCP and if the DCP signal indicates a wake-up in the next DRX onDuration, the UE only reports this periodic CSI measurement on the PUCCH. Otherwise, this CSI report is not transmitted, allowing the MR to remain dormant. In yet another embodiment, periodic CSI reporting on the PUCCH can be limited by maintaining a threshold timer as defined above in the third embodiment.

[0074] The fifth embodiment of this disclosure provides the use of LP-WUS for PDCCH skipping. When LP-WUS is used within a DRX onDuration, it is used to indicate which PDCCH moments need to be monitored. That is, LP-WUS is used to indicate whether an upcoming PDCCH moment needs to be monitored or can be skipped, thus allowing some power saving gain during the duration. In the example where LP-WUS indicates that an upcoming PDCCH moment will be skipped, the periodic reporting of CSI on the PUCCH needs to be limited to those time slots where the MR is in active PDCCH monitoring.

[0075] In one implementation, periodic CSI reports on the PUCCH can be combined with an LP-WUS indication, making the LP-WUS an implicit indication of whether a CSI report can be transmitted. When the LP-WUS indicates that the PDCCH monitoring opportunity can be skipped, the UE does not transmit any periodic CSI reports on the PUCCH. If the LP-WUS indicates that the next PDCCH monitoring opportunity can be actively monitored, then the UE can transmit a CSI report at that opportunity (if available). In this way, the MR does not wake up in any additional time slot to transmit CSI reports, which prevents any additional power consumption through the UE.

[0076] Figures 10A to 10C (collectively referred to as “Figure 10”) presents the syntax 5.1 of information elements that, in addition to physical downlink control channel (PDCCH) monitoring / skipping information, also carry explicit CSI report information according to aspects of this disclosure.

[0077] In another embodiment of the fifth embodiment, in addition to PDCCH monitoring / skip information, LP-WUS may also carry some explicit CSI reporting information. This information may be a one-bit indication or a two-bit indication. If the LP-WUS signal carries a one-bit indication for CSI reporting, the implementation can be modeled as CSI reporting activation / deactivation, where a bit value '0' indicates that the CSI report will not be transmitted in the upcoming reporting time, and a bit value '1' indicates that the MR can transmit the CSI report in the next reporting time. In an enhancement to this implementation, if the CSI reporting bit indication value is '1', then reporting can be further limited to those times when LP-WUS indicates that PDCCH can be actively monitored.

[0078] Alternatively, if the LP-WUS signal carries this explicit CSI reporting information as two bits, then the two bits can indicate the duration for which the CSI reporting timing can be skipped. For example, the skip duration can be based on a new parameter defined in the PDCCH-Config element (e.g., csi-SkippingDurationList-r19). As an example, the two bits take the values ​​'00', '01', '10', and '11', where these values ​​respectively indicate no skipping, a skip duration equal to a first value in csi-SkippingDurationList-r19, a skip duration equal to a second value in csi-SkippingDurationList-r19, or a skip duration equal to a third value in csi-SkippingDurationList-r19. If multiple durations are not provided in csi-SkippingDurationList-r19, then values ​​'10' and / or '11' may be considered reserved. In yet another embodiment, periodic CSI reporting on the PUCCH can be limited by maintaining a threshold timer as defined above in the third embodiment.

[0079] The sixth embodiment of this disclosure provides for a reduction in the emission of other non-periodic CSI reports. When LP-WUS monitoring is enabled in RRC_CONNECTED mode, it may also be necessary to constrain and / or limit the reporting of CSI reports (e.g., non-periodic and semi-persistent reports) in addition to periodic reports emitted on the PUCCH to prevent degradation of the power-saving gains achieved through the use of LR. In the sixth embodiment, the emission of such reports can be limited by triggering such reports less frequently and / or by limiting / constraining the reports themselves.

[0080] In one implementation, the triggering of such reports can be reduced by limiting the frequency at which the network sends lower-level triggers to the UE. That is, triggers used by the MAC CE or DCI signals to report CSI information can be limited and / or constrained based on the UE's mobility state, the UE's power saving requirements, the LR coverage, and / or a combination of both or all of these factors. As utilized herein, the UE's mobility state refers to how fast or slow the UE can move, the power saving requirements refer to the urgency of the UE's need to reduce power consumption (e.g., if the UE's battery may be low), and the LR coverage can refer to the strength of the reference signal received power (RSRP) as measured by the LR. In this implementation, the UE shares the criteria for limiting CSI requests (e.g., mobility state, power saving requirements, or LR coverage) with the network before LP-WUS is activated or when LP-WUS is activated and before the MR enters sleep mode. In one instance, when LR is configured and activated to monitor LP-WUS in RRC_CONNECTED mode, the network activates semi-persistent CSI reporting solely via the Media Access Control (MAC) element (CE) when the UE's mobility exceeds a certain threshold or falls within a certain range. Mobility state information is shared with the network using some UE Assistive Information (UAI) to prevent this reporting from being activated too frequently.

[0081] In another implementation, when the LR is configured and activated to monitor the LP-WUS by combining reports with a wake-up indication in the LP-WUS, CSI reporting can be constrained, as defined above in the second and fifth embodiments. That is, a CSI report may only be transmitted in the time slot where the LP-WUS signal indicates that the MR needs to be woken up. Otherwise, even if triggered, the CSI report will not be transmitted. In an enhancement, when the LP-WUS is enabled / activated, CSI reporting can be further time-constrained, as defined above in the third embodiment. That is, the solutions / enhancements defined in the above embodiments can also be applied to semi-persistent and non-periodic CSI reporting on the PUCCH / PUSCH to increase the MR's sleep time.

[0082] The seventh embodiment of this disclosure provides portions of enabling the LR to perform CSI reporting measurements. The seventh embodiment limits or constrains the MR's wake-up when monitoring LP-WUS in RRC_CONNECTED mode by offloading some of the CSI measurements to the LR, thereby allowing extended sleep of the MR when a CSI report is triggered. To trigger an 'LR-CSI report' (i.e., a report based on CSI measurements performed by the LR), the network first sends a CSI request to the UE. The UE then formulates a report based on the measurements performed by the LR, and finally, the UE transmits this report.

[0083] In one implementation, the network may send a CSI request on the DCI signal to the MR as is customary, and the MR then uses inter-processor communication to forward this request to the LR. Alternatively, the network may have a new CSI request specific to the LR, and the request may be received directly by the LR. For example, the request may be an LP-WUS with CSI-RS quasi-co-address type D (QCL-D). Once the LR receives this request and performs the required measurements, the LR can use inter-processor communication to forward these values ​​to the MR, after which the MR generates an LR-CSI report, or the LR may generate the LR-CSI report directly. When the report is ready, the MR may wake up at the appropriate reporting time to transmit the report.

[0084] In another implementation, the reporting timing may be based on reporting constraints or limitations as defined in the embodiments above, wherein LR-CSI reports are distinguished by a tag within the report. The tag may be a one-bit indicator that the current report is an LR measurement report. Alternatively, the reporting timing of LR-CSI reports may differ from that of conventional CSI reports, allowing the network to implicitly know the report type based on when the network receives the report.

[0085] Figure 11 An example of a UE 1100 according to aspects of this disclosure is described. UE 1100 may include a processor 1102, a memory 1104, a controller 1106, and a transceiver 1108. The processor 1102, memory 1104, controller 1106, or transceiver 1108, or various combinations thereof, or various components thereof, may be examples of components for performing the various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (e.g., operatively, communicatively, functionally, electronically, electrically).

[0086] Processor 1102, memory 1104, controller 1106, or transceiver 1108, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may be a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured or otherwise supporting components for performing the functions described in this disclosure.

[0087] Processor 1102 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some embodiments, processor 1102 may be configured to operate memory 1104. In some other embodiments, memory 1104 may be integrated into processor 1102. Processor 1102 may be configured to execute computer-readable instructions stored in memory 1104 to cause UE 1100 to perform various functions of this disclosure.

[0088] Memory 1104 may comprise volatile or non-volatile memory. Memory 1104 may store computer-readable, computer-executable code containing instructions that, when executed by processor 1102, cause UE 1100 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as memory 1104 or another type of memory. Computer-readable medium includes both non-transitory computer storage media and communication media, wherein the communication media includes any media that facilitates the transfer of a computer program from one place to another. Non-transitory storage media may be any available media accessible by a general-purpose or special-purpose computer.

[0089] In some embodiments, processor 1102 and memory 1104 coupled to processor 1102 may be configured to cause UE 1100 to perform one or more of the functions described herein (e.g., instructions stored in memory 1104 are executed by processor 1102). For example, processor 1102 may support wireless communication at UE 1100 according to examples disclosed herein. UE 1100 may be configured to support components for wireless communication that operate with master radio 1114 or low-power radio 1116 to support channel state information (CSI) reporting.

[0090] Controller 1106 manages the input and output signals of UE 1100. Controller 1106 can also manage peripheral devices not integrated into UE 1100. In some embodiments, controller 1106 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some embodiments, controller 1106 may be implemented as part of processor 1102.

[0091] In some embodiments, UE 1100 may include at least one transceiver 1108. In some other embodiments, UE 1100 may have more than one transceiver 1108. Transceiver 1108 may represent a radio transceiver. Transceiver 1108 may include one or more receiver chains 1110, one or more transmitter chains 1112, or a combination thereof. A portion of one or more receiver chains 1110 and one or more transmitter chains 1112 is incorporated into a main radio 1114. Another portion of one or more receiver chains 1110 and one or more transmitter chains 1112 is incorporated into a low-power radio 1116. Low-power radio 1116 may have less communication performance capability than main radio 1114, but does consume less power than main radio 1114. To support CSI reporting, low-power radio 1116 may be configured as an LP-WUR to trigger wake-up of main radio 1114.

[0092] Receiver chain 1110 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, receiver chain 1110 may include one or more antennas for receiving signals over the air or over a wireless medium. Receiver chain 1110 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 1110 may include at least one demodulator configured to demodulate the received signal and obtain transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 1110 may include at least one decoder for decoding and processing the demodulated signal to receive the transmitted data.

[0093] Transmitter chain 1112 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 1112 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 1112 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 1112 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0094] In one or more aspects of this disclosure, UE 1100 performs wireless communication via a transceiver 1108 comprising a main radio 1114 and a low-power radio 1116. UE 1100 includes at least one processor 1102 and at least one memory 1104. The at least one processor 1102 is coupled to at least one memory 1104 and the transceiver 1108. The at least one processor 1102 is configured such that UE 1100, in response to configuring the low-power radio 1114 to serve as an LP-WUR for transceiver 1108, performs the following: UE 1100 initiates communication using the low-power radio 1116 from network equipment 1300 (… Figure 13 The UE 1100 monitors the low-power wake-up signal (LP-WUS) in the downlink. The UE 1100 receives configurations for at least one CSI transmission condition. In response to identifying that a CSI transmission condition is not met, the UE 1100 continues to monitor the LP-WUS in the downlink using low-power radio 1116.

[0095] In one or more aspects of this disclosure, in response to identifying that at least one CSI transmission condition is met, UE 1100 may wake up the main radio 1114 to measure a reference signal on the downlink. UE 1100 generates a CSI report based on the measurement of the reference signal. UE 1100 reports to network equipment 1300 ( Figure 13 Transmit a CSI report. In one or more specific embodiments, the UE 1100 marks the CSI report with information indicating the measurement of the reference signal by the main radio 1114.

[0096] In one or more aspects of this disclosure, UE 1100 determines the next CSI reporting timing associated with the master radio. During the next CSI reporting timing, UE 1100 uses the master radio 1114 to transmit a CSI report. In one or more aspects of this disclosure, in response to UE 1100 entering LP-WUS configuration, at least one processor 1102 is configured to cause UE 1100 to determine whether to report or not report CSI based on parameters contained within the LP-WUS configuration. In one or more specific embodiments, UE 1100 wakes up the master radio 1114 for CSI reporting based on parameters contained within the LP-WUS configuration being set to either true or false. User equipment does not wake up the master radio 1114 for CSI reporting based on parameters contained within the LP-WUS configuration being set to another false / true. In one or more specific embodiments, in response to UE 1100 entering a low-power wake-up signal configuration, at least one processor 1102 is configured to prevent UE 1100 from waking up the main radio 1114 for CSI reporting based on the omission of CSI reporting parameters in the LP-WUS configuration.

[0097] In one or more aspects of this disclosure, the LP-WUS configuration implements waking up the master radio 1114 for CSI reporting based on an indication within the received LP-WUS. At least one processor 1102 is configured to cause the UE 1100 to parse parameters indicating whether the LP-WUS indicates whether to wake up or not the master radio 1114 for CSI reporting in response to the reception of the received LP-WUS.

[0098] In one or more aspects of this disclosure, UE 1100 performs CSI reporting on a first periodic basis (when not configured for use with LP-WUS). UE 1100 identifies the time requirement of the LP-WUS configuration. The time requirement indicates the elapsed time since the last CSI report transmission before waking the master radio 1114 for the next periodic CSI report. UE 1100 implements a timer requirement to make CSI reporting occur less frequently to provide power savings. In one or more specific embodiments, UE 1100 implements the timer requirement based on one or more of the user equipment's stored power state, the user equipment's mobility rate, and UE 1100's power coverage. In one or more specific embodiments, UE 1100 implements the timer requirement for a period up to the time before transmission, configured by one of the Radio Resource Control (RRC) configurations or maintained by the Media Access Control (MAC) layer. In one or more specific embodiments, UE 1100 implements the timer requirement as a disable timer that disables CSI reporting until the disable timer expires. In one or more specific embodiments, UE 1100 adjusts the duration required by the timer based on the received RRC parameters.

[0099] In one or more aspects of this disclosure, in response to being configured for DRX, UE 1100 determines whether a low-power wake-up signal indicates downlink control information for monitoring a power saving (DCP) signal during the next DCP monitoring period, wherein CSI reporting depends on DCP monitoring occurring. In one or more specific embodiments, UE 110 determines, based on DCP monitoring, whether a DCP signal indicates a wake-up of the primary radio during the next DRX onDuration period. In response to determining that a DCP signal does not indicate a wake-up of the primary radio during the next DRX onDuration period, UE 1100 does not wake up the primary radio for CSI reporting.

[0100] In one or more aspects of this disclosure, UE 1100 maintains a timer since the last transmission of a CSI report. In response to configuration for DRX, UE 1100 determines whether the LP-WUS configuration indicates monitoring of the DCP signal during the next DCP monitoring period, where the CSI report depends on the occurrence of DCP monitoring. In response to generating a CSI report, UE 1100 wakes up the primary radio to transmit the CSI report based on the timer. In one or more specific embodiments, UE 1100 implements the timer for a period up to the time preceding transmission, configured by one of the RRC configurations or maintained by the Media Access Control (MAC) layer. In one or more specific embodiments, UE 1100 implements the timer as a disable timer that disables CSI reporting until the disable timer expires. In one or more specific embodiments, UE 1100 adjusts the duration required by the timer based on received RRC parameters.

[0101] In one or more aspects of this disclosure, UE 1100 determines the timing of whether to monitor the Physical Downlink Control Channel (PDCCH) by waking up the primary radio based on an indication in a low-power wake-up signal. The constraint on PDCCH monitoring implicitly instructs that CSI reports on the Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) be constrained to the time slot corresponding to the PDCCH monitoring.

[0102] In one or more aspects of this disclosure, UE 1100 determines the timing of PDCCHs that will not be monitored based on indications in a low-power wake-up signal, and explicitly determines whether to explicitly skip or allow CSI reports on the PUCCH or PUSCH corresponding to the PDCCH monitoring time slot. In one or more specific embodiments, UE 1100 determines the number of times CSI reports on the PUCCH or PUSCH that will be explicitly skipped based on LP-WUS.

[0103] In one or more aspects of this disclosure, UE 1100 communicates with network equipment 1300 ( Figure 13 ) transmits non-periodic CSI reports. In one or more aspects of this disclosure, UE 1100 transmits non-periodic CSI reports to network equipment 1300. Figure 13 ) transmits semi-persistent CSI reports. In one or more aspects of this disclosure, UE 1100 transmits semi-persistent CSI reports to network equipment 1300 via transceiver 1108. Figure 13 Transmit user equipment auxiliary information, which includes at least one of the following: UE 1100's power status, mobility status, and low-power coverage, to inform network device 1300. Figure 13 CSI reports are dispatched less frequently.

[0104] In one or more aspects of this disclosure, in response to identifying that CSI transmission conditions are met, UE 1100 uses low-power radio 1116 to measure a reference signal on the downlink. UE 1100 generates a CSI report based on the measurement of the reference signal. UE 1100 wakes up master radio 1114, and UE 1100 uses master radio 1114 to transmit the CSI report to network equipment 1300 (1300). In one or more specific embodiments, UE 1100 uses master radio 1114 to receive a CSI request. UE 1100 transmits the CSI request to low-power radio 1116 via inter-processor communication. In one or more specific embodiments, UE 1100 identifies the CSI request contained in the low-power wake-up radio signal via low-power radio 1116. In one or more specific embodiments, UE 1100 marks the CSI report with information indicating the measurement of the reference signal by low-power radio 1116. In one or more specific embodiments, UE 1100 determines the next CSI report timing associated with low-power radio 1116. UE 1100 uses low-power radio 1116 to transmit a CSI report during the next CSI report timing.

[0105] In one or more aspects of this disclosure, UE 1100 supports wireless communication and includes a transceiver having a main radio 1140 and a low-power radio 1160. UE 1100 includes at least one memory 1104. UE 1100 includes at least one processor 1102 coupled to the transceiver 1108 and at least one memory 1104. At least one processor 1102 is configured such that UE 1100, in response to configuring the low-power radio 1116 as a low-power wake-up radio for the transceiver 1108: (i) initiates the use of the low-power radio 1116 in a manner from network equipment 1300 ( Figure 13 (ii) Monitor low-power wake-up signals in the downlink; (iii) Receive wake-up indications in the LP-WUS; (iv) Identify from the wake-up indications whether the main radio (MR) needs to be woken up; and (v) Identify from the LP-WUS whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations.

[0106] Figure 12An example of processor 1200 according to aspects of this disclosure is described. Processor 1200 may be an example of a processor configured to perform various operations according to the examples described herein. Processor 1200 may include controller 1202 configured to perform various operations according to the examples described herein. Processor 1200 may optionally include at least one memory 1204, which may be, for example, an L1 / L2 / L3 cache. Additionally or alternatively, processor 1200 may optionally include one or more arithmetic logic units (ALUs) 1206. One or more of these components may be electronically communicated or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0107] Processor 1200 may be a processor chipset and includes a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receive, acquire, retrieve, transmit, output, forward, store, determine, identify, access, write, read) according to the examples described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory native to the processor chipset (e.g., processor 1200) or contained within the processor chipset (e.g., processor 1200) or other memory (e.g., random access memory (RAM), read-only memory (ROM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase-change memory (PCM), and others)).

[0108] Controller 1202 can be configured to manage and coordinate various operations of processor 1200 (e.g., signaling, receiving, acquiring, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, and reading) to enable processor 1200 to support various operations according to examples described herein. For example, controller 1202 can operate as a control unit of processor 1200, generating control signals that manage the operation of various components of processor 1200. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating operation timing.

[0109] Controller 1202 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from memory 1204 and determine subsequent instructions to be executed to enable processor 1200 to support various operations according to examples described herein. Controller 1202 may be configured to track the memory addresses of instructions associated with memory 1204. Controller 1202 may be configured to decode instructions to determine the operations to be performed and the operands involved. For example, controller 1202 may be configured to interpret instructions and determine control signals to be output to other components of processor 1200 to enable processor 1200 to support various operations according to examples described herein. Additionally or alternatively, controller 1202 may be configured to manage data flow within processor 1200. Controller 1202 may be configured to control data transfers between registers, arithmetic logic unit (ALU), and other functional units of processor 1200.

[0110] Memory 1204 may include one or more caches (e.g., memory local to processor 1200 or included in processor 1200, or other memory such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc.). In some embodiments, memory 1204 may reside within or on the processor chipset (e.g., local to processor 1200). In some other embodiments, memory 1204 may reside outside the processor chipset (e.g., remote from processor 1200).

[0111] Memory 1204 may store computer-readable, computer-executable code containing instructions that, when executed by processor 1200, cause processor 1200 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. Controller 1202 and / or processor 1200 may be configured to execute computer-readable instructions stored in memory 1204 to cause processor 1200 to perform various functions. For example, processor 1200 and / or controller 1202 may be coupled to or coupled to memory 1204, and processor 1200, controller 1202, and memory 1204 may be configured to perform the various functions described herein. In some instances, processor 1200 may include multiple processors, and memory 1204 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be individually or collectively configured to perform the various functions described herein.

[0112] One or more ALUs 1206 may be configured to support various operations according to the examples described herein. In some embodiments, one or more ALUs 1206 may reside within or on a processor chipset (e.g., processor 1200). In some other embodiments, one or more ALUs 1206 may reside outside the processor chipset (e.g., processor 1200). One or more ALUs 1206 may perform one or more calculations on data, such as addition, subtraction, multiplication, and division. For example, one or more ALUs 1206 may receive input operands and an opcode that determines the operation to be performed. One or more ALUs 1206 are configured with various logic and arithmetic circuitry, including adders, subtractors, shifters, and logic gates, to process and manipulate data according to the operation. Alternatively, one or more ALUs 1206 may support logical operations such as AND, OR, XOR, NOR, and NAND, enabling one or more ALUs 1206 to handle conditional operations, comparisons, and bitwise operations.

[0113] According to the examples disclosed herein, processor 1200 may support wireless communication. Processor 1200 may be configured or operable to support components for configuring UE 1100 ( Figure 11 The low-power radio 1116 is used to perform LP-WUR to wake up the main radio 1114 for CSI reporting with a reduced number of occurrences, thus saving power. A certain number of CSI reports can be retained to ensure UE 1100 ( Figure 11 ) communication coverage.

[0114] Continue to refer to Figure 11 According to aspects of this disclosure, UE 1100 implements processor 1102, memory 1104, controller 1106, and transceiver 1108 as a baseband chipset 1120 performing the functions described herein. In one or more aspects of this disclosure, the baseband chipset 1120 of UE 1100 supports wireless communication and includes a transceiver having a main radio 1140 and a low-power radio 1160. Baseband chipset 1120 includes at least one memory 1104. Baseband chipset 1120 includes at least one processor 1102 coupled to transceiver 1108 and at least one memory 1104. Baseband chipset 1120 is configured such that UE 1100, in response to configuring low-power radio 1116 to be used as a low-power wake-up radio for transceiver 1108, to: (i) use low-power radio 1116 to initiate a low-power wake-up radio from network equipment 1300 ( Figure 13(ii) Monitor low-power wake-up signals in the downlink; (iii) Receive wake-up indications in the LP-WUS; (iv) Identify from the wake-up indications whether the main radio (MR) needs to be woken up; and (v) Identify from the LP-WUS whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations.

[0115] Figure 13 An example of NE 1300 according to aspects of this disclosure is described. NE 1300 may include a processor 1302, a memory 1304, a controller 1306, and a transceiver 1308. Processor 1302, memory 1304, controller 1306, and transceiver 1308, or various combinations thereof, or various components thereof, may be examples of components for performing the various aspects of this disclosure as described herein. These components may be coupled via one or more interfaces (not explicitly shown) (e.g., operatively, communicatively, functionally, electronically, electrically).

[0116] Processor 1302, memory 1304, controller 1306, or transceiver 1308, or various combinations or components thereof, may be implemented in hardware (e.g., a circuit system). The hardware may be a processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured or otherwise supporting components for performing the functions described in this disclosure.

[0117] Processor 1302 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, or any combination thereof). In some embodiments, processor 1302 may be configured to operate memory 1304. In some other embodiments, memory 1304 may be integrated into processor 1302. Processor 1302 may be configured to execute computer-readable instructions stored in memory 1304 to cause NE 1300 to perform various functions of this disclosure.

[0118] Memory 1304 may comprise volatile or non-volatile memory. Memory 1304 may store computer-readable, computer-executable code containing instructions that, when executed by processor 1302, cause NE 1300 to perform the various functions described herein. The code may be stored in a non-transitory computer-readable medium, such as memory 1304 or another type of memory. Computer-readable medium includes both non-transitory computer storage media and communication media, wherein the communication media includes any media that facilitates the transfer of a computer program from one place to another. Non-transitory storage media may be any available media accessible by a general-purpose or special-purpose computer.

[0119] In some implementations, processor 1302 and memory 1304 coupled to processor 1302 may be configured to cause NE 1300 to perform one or more of the functions described herein (e.g., instructions stored in memory 1304 are executed by processor 1302). For example, processor 1302 may support wireless communication at NE 1300 according to examples disclosed herein. NE 1300 may be configured to support components for configuring UE 1100 ( Figure 11 ) to use low-power radio 1116 ( Figure 11 As an LP-WUR, it wakes up the master radio less frequently compared to conventional practices. (1114) Figure 11 This is used for CSI reporting to save UE power.

[0120] Controller 1306 manages the input and output signals of NE 1300. Controller 1306 can also manage peripheral devices not integrated into NE 1300. In some embodiments, controller 1306 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some embodiments, controller 1306 may be implemented as part of processor 1302.

[0121] In some embodiments, NE 1300 may include at least one transceiver 1308. In other embodiments, NE 1300 may have more than one transceiver 1308. Transceiver 1308 may represent a wireless transceiver. Transceiver 1308 may include one or more receiver chains 1310, one or more transmitter chains 1312, or a combination thereof.

[0122] Receiver chain 1310 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, receiver chain 1310 may include one or more antennas for receiving signals over the air or over a wireless medium. Receiver chain 1310 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. Receiver chain 1310 may include at least one demodulator configured to demodulate the received signal and obtain transmitted data by reversing the modulation technique applied during signal transmission. Receiver chain 1310 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.

[0123] Transmitter chain 1312 can be configured to generate and transmit signals (e.g., control information, data, packets). Transmitter chain 1312 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques, such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase shift keying (PSK) or quadrature amplitude modulation (QAM). Transmitter chain 1312 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over a wireless medium. Transmitter chain 1312 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0124] According to aspects of this disclosure, at least one processor may further configure network equipment to receive user equipment auxiliary information associated with user equipment. The at least one processor compares the user equipment auxiliary information with one or more criterion thresholds corresponding to at least one criterion to determine whether the user equipment meets at least one criterion for reduced reporting of channel state information.

[0125] According to aspects of this disclosure, user equipment auxiliary information may include the stored power status of the user equipment. According to aspects of this disclosure, user equipment auxiliary information may include the mobility rate of the user equipment. According to aspects of this disclosure, user equipment auxiliary information may include the power coverage of the user equipment. According to aspects of this disclosure, at least one processor configures network equipment to convey an instruction to the user equipment to skip at least one occurrence of waking the master radio for transmitting channel state information reports using a Boolean flag set to either true or false. At least one processor configures network equipment to convey an instruction to the user equipment to wake the master radio for transmitting channel state information reports using a Boolean flag set to the other of false or true.

[0126] According to an aspect of this disclosure, at least one processor configures network equipment to convey an instruction to user equipment to skip a defined number of occurrences of waking up the master radio. According to an aspect of this disclosure, at least one processor configures network equipment to convey an instruction to user equipment to skip at least one occurrence of waking up the master radio for transmitting channel state information reports by configuring a timer request at the user equipment, the timer request imposing a minimum time between transmissions of channel state message reports by the user equipment's master radio. According to an aspect of this disclosure, at least one processor configures network equipment to configure the timer request by: (i) determining the duration of the timer request based on at least one auxiliary request from user equipment in a group including stored power states, mobility rates, and power coverage; and (ii) conveying the duration of the timer request to the user equipment.

[0127] Figure 14 A flowchart illustrating a method according to an aspect of this disclosure is provided. The operation of the method can be implemented by a UE as described herein. In some embodiments, the UE can execute a set of instructions to control functional elements of the UE to perform the described functions.

[0128] At 1405, the method may include configuring the transceiver of the user equipment to use a low-power wake-up radio when the main radio is in sleep mode. Operation of 1405 may be performed according to examples as described herein. In some embodiments, it may be performed by, as referenced... Figure 11 The described aspect of the UE to perform the operation of 1405.

[0129] At 1410, the method may include initiating the use of a low-power radio to monitor for low-power wake-up signals in the downlink from network equipment. Operation of 1410 may be performed according to examples as described herein. In some embodiments, it may be performed by, as referenced... Figure 11 The described aspect of the UE to perform the operation of 1410.

[0130] At 1415, the method may include receiving a wake-up indication within LP-WUS. Operation of 1415 may be performed according to the examples described herein. In some embodiments, it may be performed by, as referenced... Figure 11 The described aspect of the UE to perform the operation of 1415.

[0131] At 1420, the method may include identifying whether the master radio (MR) needs to be woken up from a wake-up indication. The operation of 1420 may be performed according to examples as described herein. In some embodiments, it may be performed by reference to... Figure 11 The described aspect of the UE to perform the operation of 1420.

[0132] At 1425, the method may include identifying from LP-WUS whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations. The operation of 1425 may be performed according to examples as described herein. In some embodiments, it may be performed by, as referenced... Figure 11 The described aspect of the UE to perform the operation of 1425.

[0133] According to aspects of this disclosure, the method may further include configuring the transceiver of the user equipment to use a low-power wake-up radio when the primary radio is in sleep mode. The method may further include configuring at least one channel state information transmission condition of the user equipment to receive information based on one or more of a low-power wake-up signal configuration associated with activating the low-power radio to monitor low-power wake-up information and an indication provided within the received low-power wake-up signal. In response to identifying that a channel state information transmission condition is not met, the method may further include continuing to use low power to monitor the low-power wake-up signal in the downlink.

[0134] According to an aspect of this disclosure, the method may further include, in response to identifying that at least one Channel State Information (CSI) transmission condition is met: (i) waking up a master radio to measure a reference signal on the downlink; (ii) generating a CSI report based on the measurement of the reference signal; and (iii) transmitting the CSI report to network equipment. According to a particular aspect of this disclosure, the method may further include tagging the CSI report with information indicating the measurement of the reference signal by the master radio. According to a particular aspect of this disclosure, the method may further include: (i) determining the next CSI reporting timing associated with the master radio; and (ii) using the master radio to transmit the CSI report during the next CSI reporting timing.

[0135] According to an aspect of this disclosure, the method may further include determining whether to report or not report CSI based on parameters contained within the LP-WUS configuration in response to the user equipment entering a Low Power Wake-up Signal (LP-WUS) configuration. According to a particular aspect of this disclosure, the method may further include: (i) waking up the primary radio for CSI reporting based on a parameter contained within the LP-WUS configuration being set to either true or false; and (ii) not waking up the primary radio for CSI reporting based on the other parameter contained within the LP-WUS configuration being set to false or true. According to a particular aspect of this disclosure, the method may further include not waking up the primary radio for CSI reporting based on the omission of CSI reporting parameters in the LP-WUS configuration in response to the user equipment entering a Low Power Wake-up Signal configuration.

[0136] According to aspects of this disclosure, an LP-WUS configuration implements waking up the master radio for CSI reporting based on an indication within the received LP-WUS. The method may further include resolving parameters of the LP-WUS indication—whether to wake up or not—for CSI reporting in response to the reception of the received LP-WUS.

[0137] According to aspects of this disclosure, the method may further include: (i) performing CSI reporting on a first periodic basis; (ii) identifying a timer requirement configured for a low-power wake-up signal (LP-WUS), the time requirement indicating the elapsed time since the last channel state information (CSI) report was transmitted before waking up the master radio for the next periodic CSI report; and (iii) implementing the timer requirement to make CSI reports reported less frequently for power saving.

[0138] According to a specific aspect of this disclosure, the method may further include implementing a timer requirement based on one or more of the user equipment's stored power state, the user equipment's mobility rate, and the user equipment's power coverage. According to a specific aspect of this disclosure, the method may further include implementing the timer requirement for a period up to the time preceding transmission, configured by one of the Radio Resource Control (RRC) configurations or maintained by the Media Access Control (MAC) layer.

[0139] According to a specific aspect of this disclosure, the method may further include implementing a timer request as a disable timer, the disable timer disabling CSI reporting until the disable timer expires. According to a specific aspect of this disclosure, the method may further include adjusting the duration of the timer request based on received Radio Resource Control (RRC) parameters.

[0140] According to an aspect of this disclosure, the method may further include, in response to being configured for discontinuous reception (DRX), determining whether a low-power wake-up signal indicates monitoring of a DCP signal during the next DCP monitoring period, wherein CSI reporting depends on the occurrence of DCP monitoring. According to a specific aspect of this disclosure, the method may further include, based on DCP monitoring, determining whether a DCP signal indicates a wake-up of the primary radio during the next DRX onDuration period; and, in response to determining that the DCP signal does not indicate a wake-up of the primary radio during the next DRX onDuration period, not waking up the primary radio for CSI reporting.

[0141] According to aspects of this disclosure, the method may further include maintaining a timer since the last transmission of the Channel Status Information (CSI) report. The method may further include, in response to being configured for Discontinuous Reception (DRX), determining whether a Low Power Wake-up Signal (LP-WUS) configuration indicates monitoring of the DCP signal during the next DCP monitoring opportunity, wherein the CSI report depends on the occurrence of DCP monitoring. The method may further include, in response to generating a CSI report, waking up the master radio to transmit the CSI report based on a timer.

[0142] According to a specific aspect of this disclosure, the method may further include implementing a timer for a period up to the time preceding transmission, configured by one of the Radio Resource Control (RRC) configurations or maintained by the Media Access Control (MAC) layer. According to a specific aspect of this disclosure, the method may further include implementing the timer as a disable timer, which disables CSI reporting until the disable timer expires. According to a specific aspect of this disclosure, the method may further include adjusting the duration required by the timer based on received Radio Resource Control (RRC) parameters.

[0143] According to aspects of this disclosure, the method may further include determining, based on an indication in a low-power wake-up signal, whether to monitor the physical downlink control channel (PDCCH) by waking up the master radio, wherein the constraint on monitoring the PDCCH implicitly instructs to constrain CSI reports on the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) to the time slot corresponding to the PDCCH monitoring.

[0144] According to aspects of this disclosure, the method may further include determining the timing of a PDCCH that will not be monitored based on an indication in a low-power wake-up signal, and determining whether to explicitly skip or allow a CSI report on the Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) corresponding to the time slot monitored by the PDCCH.

[0145] According to a specific aspect of this disclosure, the method may further include determining the number of times a Channel State Information (CSI) report on the PUCCH or PUSCH will be explicitly skipped based on a low-power wake-up signal. According to an aspect of this disclosure, the method may further include transmitting aperiodic Channel State Information (CSI) reports to the network equipment. According to an aspect of this disclosure, the method may further include transmitting semi-persistent Channel State Information (CSI) reports to the network equipment.

[0146] According to aspects of this disclosure, the method may further include transmitting user equipment auxiliary information to network equipment via a transceiver, including at least one of user equipment power status, mobility status, and low-power coverage to indicate the scheduling of less frequent channel state information (CSI) reports by the network equipment.

[0147] According to an aspect of this disclosure, the method may further include, in response to identifying that a Channel State Information (CSI) transmission condition is met: (i) measuring a reference signal on the downlink using a low-power radio; (ii) generating a CSI report based on the measurement of the reference signal; (iii) waking up the master radio; and (iv) transmitting the CSI report to network equipment using the master radio. According to a particular aspect of this disclosure, the method may further include: (i) receiving a CSI request using the master radio; and (ii) transmitting the CSI request to the low-power radio via inter-processor communication. According to a particular aspect of this disclosure, the method may further include identifying a CSI request contained in a low-power wake-up radio signal via the low-power radio. According to a particular aspect of this disclosure, the method may further include tagging the CSI report with information indicating a measurement of the reference signal by the low-power radio. According to a particular aspect of this disclosure, the method may further include: (i) determining a next CSI report timing associated with the low-power radio; and (ii) transmitting a CSI report using the low-power radio during the next CSI report timing.

[0148] It should be noted that the method described herein describes one possible implementation, and the operation and steps may be rearranged or otherwise modified, and other implementations are possible.

[0149] Figure 15 A flowchart illustrating a method according to an aspect of this disclosure is provided. The operation of the method may be implemented by an NE as described herein. In some embodiments, the NE may execute a set of instructions to control the functional elements of the NE to perform the described functions.

[0150] At point 1505, the method may include connecting via a transceiver to a UE having a low-power wake-up radio and a master radio. Operation of point 1505 may be performed according to examples as described herein. In some embodiments, it may be performed by, as referenced... Figure 13 The described NE is used to perform the operation of 1505.

[0151] At 1510, the method may include configuring user equipment to use a low-power radio to detect a low-power wake-up signal to wake up the master radio. Operation of 1510 may be performed according to the examples described herein. In some embodiments, it may be performed by, as referenced... Figure 13 The described NE is used to perform the operation of 1510.

[0152] At point 1515, the method may include receiving user equipment assistance information associated with the user equipment, which may include one or more of stored power, mobility rate, and power coverage. Operation of point 1515 may be performed according to the examples described herein. In some embodiments, it may be performed by, as referenced... Figure 13The described NE is used to perform the operation of 1515.

[0153] At 1520, the method may include comparing user equipment auxiliary information with one or more corresponding criterion thresholds of at least one criterion to determine whether the user equipment meets at least one criterion for reducing CSI reports. Operation of 1520 may be performed according to examples as described herein. In some embodiments, it may be performed by, as referenced... Figure 13 The described NE is used to perform the operation of 1520.

[0154] At point 1525, the method may include configuring at least one CSI transmit condition to the user equipment. Operation at point 1525 may be performed according to the examples described herein. In some embodiments, it may be performed by, as referenced... Figure 13 The described NE is used to perform the operation of 1525.

[0155] According to an aspect of this disclosure, the method may further include receiving user equipment auxiliary information associated with the user equipment. The method may further include comparing the user equipment auxiliary information with one or more criterion thresholds corresponding to at least one criterion to determine whether the user equipment meets at least one criterion for reduced reporting of channel state information. According to an aspect of this disclosure, the user equipment auxiliary information includes the stored power state of the user equipment. According to an aspect of this disclosure, the user equipment auxiliary information includes the mobility rate of the user equipment. According to an aspect of this disclosure, the user equipment auxiliary information includes the power coverage of the user equipment.

[0156] According to an aspect of this disclosure, the method may further include conveying an instruction to the user equipment to skip at least one occurrence of waking the master radio for transmitting channel state information reports using a Boolean flag set to either true or false. The method may further include conveying an instruction to the user equipment to wake the master radio for transmitting channel state information reports using a Boolean flag set to the other of false or true.

[0157] According to an aspect of this disclosure, the method may further include conveying an indication to the user equipment to skip a defined number of occurrences of waking up the master radio. According to an aspect of this disclosure, the method may further include conveying an indication to the user equipment to skip at least one occurrence of waking up the master radio for transmitting channel status information reports by configuring a timer requirement at the user equipment, the timer requirement imposing a minimum time between transmissions of channel status message reports by the user equipment's master radio.

[0158] According to a particular aspect of this disclosure, the method may further include configuring a timer request by: (i) determining the duration of the timer request based on at least one auxiliary request from a group of user equipment including stored power states, mobility rates and power coverage; and (ii) communicating the duration of the timer request to the user equipment.

[0159] It should be noted that the methods described herein describe possible implementations, and the operations and steps may be rearranged or otherwise modified, and other implementations are possible.

[0160] The description herein is provided to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A user equipment (UE) for wireless communication, the UE comprising: Transceiver, which includes a main radio and a low-power radio; At least one memory; and At least one processor coupled to the transceiver and the at least one memory, and configured to enable the UE to: In response to configuring the low-power radio to be used as the low-power wake-up radio of the transceiver: Initiate the use of the low-power radio to monitor the low-power wake-up signal LP-WUS in the downlink from network equipment; Receive wake-up instruction within the LP-WUS; The wake-up indication identifies whether the main radio (MR) needs to be woken up. and The LP-WUS identifies whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations.

2. The UE of claim 1, wherein the at least one processor is further configured to cause the UE to: In response to identifying at least one Channel State Information (CSI) transmission condition: Wake up the main radio to measure the reference signal on the downlink; A CSI report is generated based on measurements of the reference signal; and The CSI report is transmitted to the network equipment.

3. The UE of claim 2, wherein the at least one processor is further configured to cause the UE to: Determine the timing of the next CSI report associated with the primary radio; and The CSI report is transmitted using the main radio during the next CSI report timing.

4. The UE of claim 1, wherein in response to the UE entering LP-WUS configuration, the at least one processor is configured to cause the UE to determine whether to report or not report the Channel State Information (CSI) based on whether the LP-WUS is received.

5. The UE of claim 1, wherein in response to the UE entering an LP-WUS configuration, the at least one processor is configured to cause the UE to determine, based on parameters contained in the LP-WUS configuration, whether to report or not report the Channel State Information (CSI).

6. The UE according to claim 5, wherein: The at least one processor is configured such that the UE wakes up the main radio for CSI reporting based on a parameter contained in the LP-WUS configuration being set to either true or false; The at least one processor is configured such that the UE is set to another false / true state based on the parameters contained in the LP-WUS configuration to prevent the main radio from waking up for CSI reporting; and The at least one processor is configured such that the UE does not wake up the main radio for CSI reporting based on the omission of CSI reporting parameters in the LP-WUS configuration.

7. The UE of claim 1, wherein the LP-WUS configuration implements waking up the primary radio for CSI reporting based on an indication within the received LP-WUS, and the at least one processor is configured to cause the UE to parse parameters indicating whether the received LP-WUS indication is to wake up or not wake up the primary radio for CSI reporting in response to the reception of the received LP-WUS.

8. The UE of claim 1, wherein the at least one processor is configured to equip the user with: Perform CSI reporting according to the first cycle; Identify the timer requirement of the LP-WUS configuration, the time requirement indicating the elapsed time since the last Channel State Information (CSI) report was transmitted before waking the master radio for the next periodic CSI report; and The timer requirement is implemented to make the CSI report less frequent for power saving.

9. The UE of claim 8, wherein the at least one processor is configured to cause the UE to implement the timer requirement based on one or more of the stored power state of the user equipment, the mobility rate of the user equipment, and the power coverage of the user equipment.

10. The UE of claim 8, wherein the at least one processor is configured to cause the UE to implement the timer request as a time up to the time prior to transmission, which is configured by one of the Radio Resource Control (RRC) configurations or maintained by the Media Access Control (MAC) layer.

11. The UE of claim 8, wherein the at least one processor is configured to cause the UE to enforce the timer request as a disable timer, the disable timer disabling the CSI report until the disable timer expires.

12. The user equipment of claim 8, wherein the at least one processor is configured to cause the UE to adjust the duration required by the timer based on received Radio Resource Control (RRC) parameters.

13. The UE of claim 1, wherein the at least one processor is configured to cause the UE to: The timing for monitoring the Physical Downlink Control Channel (PDCCH) is determined based on the indication in the low-power wake-up signal, wherein the constraint on monitoring the PDCCH implicitly indicates that CSI reports on the Physical Uplink Control Channel (PUCCH) or the Physical Uplink Shared Channel (PUSCH) are constrained to the time slot corresponding to the PDCCH monitoring.

14. The UE of claim 1, wherein the at least one processor is configured to cause the UE to: The timing of when the PDCCH will not be monitored is determined based on the indication in the low-power wake-up signal, and it is explicitly determined whether to skip or allow a CSI report on the Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) corresponding to the PDCCH monitoring time slot; and The number of times when the Channel State Information (CSI) report on the PUCCH or PUSCH should be explicitly skipped is determined based on the low-power wake-up signal.

15. A baseband chipset for wireless communication, the baseband chipset comprising: Transceiver, which includes a main radio and a low-power radio; At least one memory; and At least one processor coupled to the transceiver and the at least one memory, and configured to enable the baseband chipset to: In response to configuring the low-power radio to be used as the low-power wake-up radio of the transceiver: Initiate the use of the low-power radio to monitor the low-power wake-up signal LP-WUS in the downlink from network equipment; Receive wake-up instruction within the LP-WUS; The wake-up indication identifies whether the main radio (MR) needs to be woken up. and The LP-WUS identifies whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations.

16. A method for wireless communication at a user equipment (UE), the method comprising: Configure the UE's transceiver to use a low-power wake-up radio; Initiate the use of the low-power radio to monitor the low-power wake-up signal LP-WUS in the downlink from the base station; Receive wake-up instruction within the LP-WUS; The wake-up indication identifies whether the main radio (MR) needs to be woken up. and The LP-WUS identifies whether channel state information needs to be reported based on at least one or more channel state information reporting conditions and / or configurations.

17. The method of claim 16, further comprising: Configure the transceiver of the UE to use the low-power wake-up radio when the main radio is in sleep mode; Receive and activate the low-power wake-up radio to monitor the LP-WUS configuration associated with the low-power wake-up signal and the indications provided within the received LP-WUS; and In response to the identification that the channel state information transmission conditions are not met, the low-power wake-up radio continues to be used to monitor the LP-WUS in the downlink.

18. A base station for wireless communication, the base station comprising: At least one memory; and At least one processor coupled to the at least one memory and configured to enable the base station to: Connect to a user equipment (UE) with a low-power wake-up radio and a main radio; The UE is configured to use the low-power radio to monitor the low-power wake-up signal LP-WUS to wake up the main radio; and Configure at least one channel state information transmission condition for the UE.

19. The base station of claim 18, wherein the at least one processor configures the base station to: Receive user equipment assistance information associated with the user equipment, the user equipment assistance information including at least one of the user equipment's stored power status, the user equipment's movement rate, and the user equipment's power coverage; and The user equipment auxiliary information is compared with one or more criterion thresholds corresponding to at least one criterion to determine whether the user equipment meets the at least one criterion for reducing reporting of channel state information.

20. The base station of claim 18, wherein the at least one processor configures the base station to communicate an instruction to the user equipment to skip at least one occurrence of transmitting the channel state information report using a Boolean flag set to either true or false, and to communicate an instruction to the user equipment to transmit the channel state information report using the Boolean flag set to the other of false or true.

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