User equipment power saving under cell DTX / drx
By processing signaling for C-DRX and cell DTX/DRX configurations, the UE's processing circuitry facilitates the coexistence of LP-WUS with cell DTX/DRX, addressing operational challenges and enhancing energy efficiency in wireless communication.
Patent Information
- Application Number
- PCT/CN2024/110193
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2026-02-12
AI Technical Summary
Existing wireless communication technologies face challenges in efficiently implementing cell Discontinuous Transmission (DTX) and Discontinuous Reception (DRX) at both the network and user equipment (UE) sides, leading to issues with cell and/or UE operations.
The implementation of processing circuitry in user equipment (UE) to process signaling for Connected Discontinuous Reception (C-DRX) and cell DTX/DRX configurations, allowing for the coexistence of low power wakeup signals (LP-WUS) with cell DTX/DRX, including Type 1 LP-WUS for PDCCH monitoring and Type 2 LP-WUS for activating/deactivating cell DTX/DRX.
This solution enables efficient power saving in both network and UE by optimizing operations during overlapping active and inactive periods, reducing unnecessary signal monitoring and enhancing energy efficiency.
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Figure CN2024110193_12022026_PF_FP_ABST
Abstract
Description
User Equipment Power Saving Under Cell DTX / DRXTECHNICAL FIELD
[0001] The present disclosure generally relates to wireless communication, and in particular, to user equipment power saving under cell DTX / DRX.BACKGROUND
[0002] Energy saving techniques may be used both at a network side and at a user equipment (UE) side. Network side energy saving techniques include cell discontinuous transmission (cell DTX) and cell discontinuous reception (cell DRX) . UE side energy saving techniques include the use of low power wakeup signals (LP-WUS) . However, when these techniques are implemented at both the UE side and the network side there may be issues related to cell and / or UE operations.SUMMARY
[0003] Some example embodiments are related to an apparatus having processing circuitry configured to process, based on signaling received from a base station, a Connected Discontinuous Reception (C-DRX) configuration, process, based on signaling received from a base station, a cell Discontinuous Transmission (DTX) configuration or a cell Discontinuous Reception (DRX) configuration and operate in accordance with the C-DRX configuration and cell DTX configuration or cell DRX configuration, wherein the C-DRX configuration indicates that a C-DRX cycle is activated and the cell DTX configuration and cell DRX configuration indicate that cell DTX and cell DRX are not activated.
[0004] Other example embodiments are related to an apparatus having processing circuitry configured to process, based on signaling received from a base station, a Connected Discontinuous Reception (C-DRX) configuration, process, based on signaling received from a base station, a cell Discontinuous Transmission (DTX) configuration or a cell Discontinuous Reception (DRX) configuration and operate in accordance with the C-DRX configuration and cell DTX configuration or cell DRX configuration, wherein the C-DRX configuration indicates that a C-DRX cycle is activated and the cell DTX configuration or cell DRX configuration indicate that cell DTX or cell DRX is activated.Brief Description of the Drawings
[0005] Fig. 1 shows an example network arrangement according to various example embodiments.
[0006] Fig. 2 shows an example user equipment (UE) according to various example embodiments.
[0007] Fig. 3 shows an example base station according to various example embodiments.
[0008] Fig. 4 shows an example of various UE operations related to PDCCH monitoring based on receipt of an LP-WUS according to various example embodiments.
[0009] Fig. 5 shows a timing diagram showing cell DTX operation and UE Connected Discontinuous Reception (C-DRX) operation that illustrates use cases according to various example embodiments.
[0010] Fig. 6A shows an example diagram of UEs monitoring for a Type 2 LP-WUS outside of C-DRX active times according to various example embodiments.
[0011] Fig. 6B shows an example diagram of UEs monitoring for a Type 2 LP-WUS inside and outside of C-DRX active times according to various example embodiments.
[0012] Fig. 7 shows example scenarios for Case 3 where the cell and UE are both outside the cell DTX active period and the C-DRX active time according to various example embodiments.
[0013] Fig. 8 shows example scenarios for Case 4 where the cell is outside the cell DTX active period but the UE is within the C-DRX active time according to various example embodiments.Detailed Description
[0014] The example embodiments may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals. The example embodiments relate to scenarios where both LP-WUS and cell DTX or cell DRX are implemented. Specifically, the example embodiments provide operations that allow LP-WUS and cell DTX or cell DRX to coexist.
[0015] The example embodiments are described with regard to a UE.However, reference to a UE is merely provided for illustrative purposes. The example embodiments may be utilized with any electronic component that may establish a connection to an accessory device and is configured with the hardware, software, and / or firmware to exchange information and data with accessory devices. Therefore, the UE as described herein is used to represent any electronic component.
[0016] The example embodiments are also described with reference to a 5G New Radio (NR) network. However, the example embodiments may also be implemented in other types of networks, including but not limited to LTE networks, future evolutions of the cellular protocol (e.g., 5G-advanced networks, 6G networks, etc. ) , or any other type of network.
[0017] The example embodiments are described with reference to cell DTX / DRX. In some instances, the description of the example embodiments may only refer to one of cell DTX or cell DRX. The operations described for both the network side (e.g., gNB) and the UE for cell DTX or cell DRX should be understood to apply for both cell DTX and cell DRX.
[0018] The example embodiments include scenarios where the cell DTX active period does not impact LP-WUS monitoring. The example embodiments also include scenarios where, when cell DTX is configured and the cell DTX is currently outside an active period, LP-WUS may or may not be monitored. The example embodiments also provide two different types of LP-WUS, a Type 1 LP-WUS that may be used to trigger Physical Downlink Control Channel (PDCCH) monitoring and a Type 2 LP-WUS that may be used to activate / deactivate cell DTX / DRX. Each of these example embodiments will be described in greater detail below.
[0019] Fig. 1 shows an example network arrangement 100 according to various example embodiments. The example network arrangement 100 includes a UE 110. The UE 110 may be any type of electronic component that is configured to communicate via a network, e.g., mobile phones, tablet computers, desktop computers, smartphones, embedded devices, wearables, Internet of Things (IoT) devices, etc. An actual network arrangement may include any number of UEs being used by any number of users. Thus, the example of one UE 110 is merely provided for illustrative purposes.
[0020] The UE 110 may be configured to communicate with one or more networks. In the example of the network arrangement 100, the network with which the UE 110 may wirelessly communicate is a 5G NR radio access network (RAN) 120. The UE 110 may also communicate with other types of networks (e.g., 5G cloud RAN, a next generation RAN (NG-RAN) , a legacy cellular network, etc. ) and the UE 110 may also communicate with networks over a wired connection. With regard to the example embodiments, the UE 110 may establish a connection with the 5G NR RAN 120. Therefore, the UE 110 may have a 5G NR chipset to communicate with the NR RAN 120.
[0021] The 5G NR RAN 120 may be portions of a cellular network that may be deployed by a network carrier (e.g., Verizon, AT&T, T-Mobile, etc. ) . The RAN 120 may include cells or base stations that are configured to send and receive traffic from UEs that are equipped with the appropriate cellular chip set. In this example, the 5G NR RAN 120 includes the gNB 120A and the gNB 120B. However, reference to a gNB is merely provided for illustrative purposes, any appropriate base station or cell may be deployed (e.g., Node Bs, eNodeBs, HeNBs, eNBs, gNBs, gNodeBs, macrocells, microcells, small cells, femtocells, etc. ) .
[0022] Any association procedure may be performed for the UE 110 to connect to the 5G NR RAN 120. For example, as discussed above, the 5G NR RAN 120 may be associated with a particular network carrier where the UE 110 and / or the user thereof has a contract and credential information (e.g., stored on a SIM card) . Upon detecting the presence of the 5G NR RAN 120, the UE 110 may transmit the corresponding credential information to associate with the 5G NR RAN 120. More specifically, the UE 110 may associate with a specific cell (e.g., gNB 120A) .
[0023] The network arrangement 100 also includes a cellular core network 130, the Internet 140, an IP Multimedia Subsystem (IMS) 150, and a network services backbone 160. The cellular core network 130 manages the traffic that flows between the cellular network and the Internet 140. The IMS 150 may be generally described as an architecture for delivering multimedia services to the UE 110 using the IP protocol. The IMS 150 may communicate with the cellular core network 130 and the Internet 140 to provide the multimedia services to the UE 110. The network services backbone 160 is in communication either directly or indirectly with the Internet 140 and the cellular core network 130. The network services backbone 160 may be generally described as a set of components (e.g., servers, network storage arrangements, etc. ) that implement a suite of services that may be used to extend the functionalities of the UE 110 in communication with the various networks.
[0024] Fig. 2 shows an example UE 110 according to various example embodiments. The UE 110 will be described with regard to the network arrangement 100 of Fig. 1. The UE 110 may represent any electronic device and may include a processor 205, a memory arrangement 210, a display device 215, an input / output (I / O) device 220, a transceiver 225, and other components 230. The other components 230 may include, for example, an audio input device, an audio output device, a battery that provides a limited power supply, a data acquisition device, ports to electrically connect the UE 110 to other electronic devices, sensors to detect conditions of the UE 110, etc.
[0025] The processor 205 may be configured to execute a plurality of engines for the UE 110. For example, the engines may include a LP-WUS engine 235 for performing operations related to monitoring for LP-WUS. The operations include, but are not limited to, determining when to monitor for LP-WUS, determining when to monitor for PDCCH and performing operations related to the coexistence of LP-WUS and cell DTX / DRX. Each of these example operations will be described in more detail below.
[0026] The above referenced engine being an application (e.g., a program) executed by the processor 205 is only example. The functionality associated with the engines may also be represented as a separate incorporated component of the UE 110 or may be a modular component coupled to the UE 110, e.g., an integrated circuit with or without firmware. For example, the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information. The engines may also be embodied as one application or separate applications. In addition, in some UEs, the functionality described for the processor 205 is split among two or more processors such as a baseband processor and an applications processor. The example embodiments may be implemented in any of these or other configurations of a UE.
[0027] The memory arrangement 210 may be a hardware component configured to store data related to operations performed by the UE 110. The display device 215 may be a hardware component configured to show data to a user while the I / O device 220 may be a hardware component that enables the user to enter inputs. The display device 215 and the I / O device 220 may be separate components or integrated together such as a touchscreen.
[0028] The transceiver 225 may be a hardware component configured to establish a connection with the 5G NR-RAN 120, an LTE-RAN (not pictured) , a legacy RAN (not pictured) , a WLAN (not pictured) , etc. Accordingly, the transceiver 225 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 225 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 205 may be operably coupled to the transceiver 225 and configured to receive from and / or transmit signals to the transceiver 225. The processor 205 may be configured to encode and / or decode signals (e.g., signaling from a base station of a network) for implementing any one of the methods described herein.
[0029] Fig. 3 shows an example base station 300 according to various example embodiments. The base station 300 may represent the gNB 120A or any other access node through which the UE 110 may establish a connection and manage network operations.
[0030] The base station 300 may include a processor 305, a memory arrangement 310, an input / output (I / O) device 315, a transceiver 320, and other components 325. The other components 325 may include, for example, an audio input device, an audio output device, a battery, a data acquisition device, ports to electrically connect the base station 300 to other electronic devices and / or power sources, etc.
[0031] The processor 305 may be configured to execute a plurality of engines for the UE 110. For example, the engines may include an LP-WUS configuration engine 330 for performing operations related to configuring a UE with information related to LP-WUS. The operations include, but are not limited to, configuring cell DTX / DRX for the UE, configuring C-DRX for the UE, and transmitting LP-WUS to the UE, where the LP-WUS may be used to activate PDCCH monitoring or cell DTX / DRX activation / deactivation. Each of these example operations will be described in more detail below.
[0032] The memory arrangement 310 may be a hardware component configured to store data related to operations performed by the base station 300. The I / O device 315 may be a hardware component or ports that enable a user to interact with the base station 300. The transceiver 320 may be a hardware component configured to exchange data with the UE 110 and any other UE in the network arrangement 100.
[0033] The transceiver 320 may be a hardware component configured to exchange data with the UE 110 and any other UE in the network arrangement 100. The transceiver 320 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . The transceiver 320 includes circuitry configured to transmit and / or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein. The processor 305 may be operably coupled to the transceiver 320 and configured to receive from and / or transmit signals to the transceiver 320. The processor 305 may be configured to encode and / or decode signals (e.g., signaling from a UE) for implementing any one of the methods described herein.
[0034] As described above, an energy saving technique that may be implemented on the network side may be the use of cell DTX. A cell operating in cell DTX may have active periods (e.g., where the cell is transmitting) and non-active periods (e.g., where the cell is not transmitting) . A UE supporting cell DTX is not expected to monitor certain signals / channels during the non-active periods of cell DTX. For example, these signals / channels may include Physical Downlink Control Channels (PDCCHs) associated with Downlink Control Information (DCI) format 2_0 –DCI Format 2_5, PDCCH for dynamic grants / assignments for new transmissions, Radio Network Temporary Identities (RNTIs) including cellDTRX-RNTI (DCI format 2_9) , Periodic or Semi-persistent Channel State Information Reference Signals (CSI-RS) , etc.
[0035] As also described above, an energy saving technique that may be implemented on the UE side may be the use of an LP-WUS. Fig. 4 shows an example of various UE operations related to PDCCH monitoring based on receipt of an LP-WUS according to various example embodiments. Initially, Fig. 4 shows a portion of a Connected Discontinuous Reception (C-DRX) cycle of a UE. The C-DRX includes C-DRX active times 410, 420 and 430 separated by periods outside of the active time durations. The active times may include the drx-onDurationTimer (e.g., C-DRX OnDuration) , a retransmission timer, and / or an inactivity timer that are periods when the UE may be awake to monitor for signals from the cell. When a UE implements LP-WUS for PDCCH monitoring, the UE may determine whether to monitor PDCCH during a C-DRX active time.
[0036] In a first option labeled as Option 401 in Fig. 4, the UE may monitor for an LP-WUS in monitoring occasion (MO) 445 that occurs a predetermined time before the C-DRX active time 410. If the UE receives the LP-WUS in MO 445, the UE may monitor for PDCCH during the C-DRX active time 410. Specifically, the UE may initiate an active time timer associated with the active time 410 based on receipt of the LP-WUS and the UE may monitor for PDCCH while the timer is running, e.g., the length of the C-DRX active time 410 is the length of the associated active time timer. If the UE does not receive the LP-WUS in MO 445, the UE may not monitor for PDCCH during the C-DRX active time 410. Similarly, each of the C-DRX active times 420 and 430 may have a corresponding LP-WUS MO 450 and 455, respectively.
[0037] In a second option labeled as Option 402 in Fig. 4, the UE may monitor outside the C-DRX active time for LP-WUS as shown by LP-WUS MOs 460, 465, 470, 475. This may allow for a denser LP-WUS monitoring. If an LP-WUS is detected in one of the LP-WUS MOs, the UE may wakeup to monitor for PDCCH. In the example of Fig. 4, it may be considered that an LP-WUS was detected during the MO 460. Thus, the UE may wakeup during the LP trigger duration 480 to monitor for PDCCH, e.g., the LP trigger duration is similar to the active time in that the receipt of the LP-WUS initiates an LP trigger duration timer corresponding to the LP trigger duration 480 and the UE monitors for PDCCH while the timer is running. In this Option 402, the UE may continue to monitor during the MOs 445, 450 and 455 for LP-WUS to monitor for PDCCH during the corresponding C-DRX active times or the UE may be configured to not monitor PDCCH during the C-DRX active times, e.g., the PDCCH monitoring is limited to the LP trigger durations triggered by the LP-WUS.
[0038] In a third option labeled as Option 403 in Fig. 4, the UE may be configured to only monitor for LP-WUS during a C-DRX active time, e.g., there are no LP-WUS MOs outside of the C-DRX active times. If the UE receives an LP-WUS during a C-DRX active time, the UE will monitor for PDCCH during the remaining portion of the C-DRX active time. In the example of Fig. 4, it is shown that the UE receives an LP-WUS 485 during the C-DRX active time 420 and therefore the UE may monitor for PDCCH during the remaining portion of the C-DRX active time 420. No LP-WUS are shown as being received for the C-DRX active times 410 or 430 and thus, the UE will not monitor for PDCCH during these C-DRX active times.
[0039] The example embodiments describe various operations for the LP-WUS (e.g., UE side power saving technique) to coexist with cell DTX / DRX (e.g., network side power saving technique) . In the below example embodiments, it may be described that the UE may implement one or more the LP-WUS PDCCH monitoring options described above, e.g., Options 401, 402 and 403. These options will not be further described below but any reference to these options refers to the operations described above. In some instances, the below description may have additions to the options described above.
[0040] The example embodiments describe two different LP-WUS functions. A first LP-WUS function, e.g., Type 1 LP-WUS, may be used to trigger PDCCH monitoring. Some examples of an LP-WUS triggering PDCCH monitoring by a UE were described above with reference to Fig. 4. A second LP-WUS function, e.g., Type 2 LP- WUS, may be used to activate / deactivate cell DTX / DRX. Normally, cell DTX / DRX activation is signaled to the UE in the PDCCH, e.g., DCI format 2_9. Each of these functions may be standalone features or may be implemented together. The example embodiments provide various operations related to each of these functions when implemented as a standalone feature or as a combination.
[0041] In addition, the example embodiments may be implemented based on various use cases related to cell DTX / DRX and UE C-DRX. Fig. 5 shows a timing diagram 500 showing cell DTX operation and UE C-DRX operation that illustrates use cases according to various example embodiments. The timing diagram 500 shows a timeline 510 for the cell DTX that includes active periods 512, 514 and 516 separated by non-active periods. The timing diagram 500 also shows a timeline 520 for the UE C-DRX that includes C-DRX active times 522, 524 and 526 separated by periods outside of the active time durations. The example use cases will be described with reference to the timelines 510 and 520.
[0042] A first example use case (e.g., Case 0) is not shown in Fig. 5 because it may be when cell DTX is not activated, e.g., the cell is not currently using cell DTX and thus the timeline 510 does not apply. This Use Case 0 may be relevant because, as described above, Type 2 LP-WUS, may be used to activate / deactivate cell DTX / DRX.
[0043] A second example use case is illustrated in Fig. 5 as Case 1 530. The Case 1 530 occurs when the timelines 510 and 520 are within a cell DTX active period and within a C-DRX active time, e.g., timing is within the cell DTX active period 412 and the C-DRX active time 422. In this example, a portion of the active time 522 of the C-DRX cycle overlaps with a portion of the active period 512 of the cell DTX. The example embodiments provide examples of UE operation with respect to the LP-WUS and corresponding PDCCH monitoring and / or cell DTX / DRX activation / deactivation during this overlapping time.
[0044] A third example use case is illustrated in Fig. 5 as Case 2 540. The Case 2 540 occurs when the timelines 510 and 520 are within a cell DTX active period but outside a C-DRX active time. In this example, a portion of the active period 512 of the cell DTX overlaps with a portion outside of the active time of the C-DRX cycle, e.g., a portion between the active time 522 and 524. The example embodiments provide examples of UE operation with respect to the LP-WUS and corresponding PDCCH monitoring and / or cell DTX / DRX activation / deactivation during this overlapping time.
[0045] A fourth example use case is illustrated in Fig. 5 as Case 3 550. The Case 3 550 occurs when the timelines 510 and 520 are outside a cell DTX active period and outside a C-DRX active time. In this example, a portion of the inactive period of the cell DTX that occurs between the active periods 512 and 522 overlaps with a portion outside of the active time between the active time 522 and 524 of the C-DRX cycle. The example embodiments provide examples of UE operation with respect to the LP-WUS and corresponding PDCCH monitoring and / or cell DTX / DRX activation / deactivation during this overlapping time.
[0046] A fifth example use case is illustrated in Fig. 5 as Case 4 560. The Case 4 560 occurs when the timelines 510 and 520 are outside a cell DTX active period but within a C-DRX active time. In this example, a portion of the active time 524 is outside the active period 514 of the cell DTX and another portion of active time 524 is within the active period 514 of the cell DTX. The example embodiments provide examples of UE operation with respect to the LP-WUS and corresponding PDCCH monitoring and / or cell DTX / DRX activation / deactivation during this overlapping time.
[0047] The following description of the example embodiments will describe each of the example uses cases, e.g., Case 0 through Case 4, and provide a description of each of the LP-WUS functions Type 1 LP-WUS as a standalone feature for the use case, Type 2 LP-WUS as a standalone feature for the use case and Type 1 LP-WUS and Type 2 LP-WUS implemented together for the use case.
[0048] Thus, the following description applies to Case 0 where the cell DTX is not activated. In Case 0, when the Type 1 LP-WUS is implemented as a standalone feature, the UE may operate in accordance with any of the options for LP-WUS triggering PDCCH monitoring as described above, e.g., Option 401, Option 402 or Option 403. Thus, in this Case 0, when Type 1 LP-WUS monitoring is enabled / activated, receipt of an LP-WUS may trigger PDCCH monitoring. In this example, since Type 2 LP-WUS is not used, cell DTX may be activated by DCI format 2_9, e.g., when the UE is monitoring for PDCCH and receives a DCI format 2_9, the UE may activate cell DTX.
[0049] In Case 0, when the Type 2 LP-WUS is implemented as a standalone feature, the UE may determine that the cell DTX / DRX operation starts after a predetermined time gap from when the Type 2 LP-WUS is received.
[0050] In some example embodiments, the UE may monitor for the Type 2 LP-WUS outside C-DRX active times for activation of cell DTX. Fig. 6A shows an example diagram of UEs monitoring for a Type 2 LP-WUS outside of C-DRX active times according to various example embodiments. In the example of Fig. 6A, three timelines are shown, a timeline for a cell 601, a timeline for a UE 602 in C-DRX mode and a timeline for a UE 603 in C-DRX mode. In this example, the active times of the UE 602 and UE 603 are not aligned. This is not a requirement but only used as an illustration.
[0051] Since this example is related to Case 0 where cell DTX is not active, in the first portion 610 of the timeline for the cell 601, the cell is on and in the normal state. As stated above and as shown in Fig. 6A, the UE 602 and 603 may monitor MOs for the Type 2 LP-WUS outside of the C-DRX active times. In this example, at 615, the cell 601 may send a Type 2 LP-WUS and both the UE 602 and the UE 603 may detect the Type 2 LP-WUS. After sending the Type 2 LP-WUS at 615, the cell 601 may wait the predetermined time gap 620 and then begin cell DTX operation at 625.
[0052] Allowing the UEs to monitor for the Type 2 LP-WUS outside of the C-DRX active times may be beneficial to network energy saving, because the cell may start cell DTX earlier than having to wait until C-DRX active times for multiple UEs align before sending the Type 2 LP-WUS. In addition, this configuration allows one LP-WUS to be used to indicate to multiple UEs that the cell is activating cell DTX / DRX.
[0053] In addition, this may also be beneficial for UE energy saving because, for example, in Fig. 6A, when the UE 602 receives the Type 2 LP-WUS at 610, the UE 602 does not monitor for DCI format 2_6 prior to the active time 630 to wake and then monitor PDCCH during the active time 630 for the DCI format 2_9 to indicate that cell DTX is activated because the UE already has that information from the Type 2 LP-WUS. Thus, PDCCH monitoring in the active time 630 may be skipped. Similarly, the UE 603 may skip PDCCH monitoring during the active time 635.
[0054] In other example embodiments, the UE may monitor for the Type 2 LP-WUS both inside and outside C-DRX active times for activation of cell DTX. Fig. 6B shows an example diagram of UEs monitoring for a Type 2 LP-WUS inside and outside of C-DRX active times according to various example embodiments. In the example of Fig. 6B, three timelines are shown, a timeline for a cell 651, a timeline for a UE 652 in C-DRX mode and a timeline for a UE 653 in C-DRX mode. In this example, the active times of the UE 652 and UE 653 are not aligned. This is not a requirement but only used as an illustration.
[0055] Since this example is related to Case 0 where cell DTX is not active, in the first portion 660 of the timeline for the cell 651, the cell is on and in the normal state. As stated above and as shown in Fig. 6B, the UE 652 and 653 may monitor MOs for the Type 2 LP-WUS both inside and outside of the C-DRX active times. In this example, at 665, the cell 651 may send a Type 2 LP-WUS. The UE 652 that is outside a C-DRX active time may detect the Type LP-WUS and the UE 653 that is within a C-DRX active time may also detect the Type 2 LP-WUS. After sending the Type 2 LP-WUS at 665, the cell 651 may wait the predetermined time gap 670 and then begin cell DTX operation at 675. The UE 653 that is monitoring for the LP-WUS within the C-DRX active time may also be monitoring PDCCH during the C-DRX active time, e.g., for DCI Format 2_9 that may also indicate the activation of the cell DTX.
[0056] Again, allowing UEs to monitor both inside and outside the C-DRX active times may be beneficial to network energy saving because the cell may send one LP-WUS to activate cell DTX for multiple UEs, otherwise, if DCI format 2_9 is used, multiple DCIs need to be sent. Similar to the example described above, the UE 652 may skip PDCCH monitoring during the active time 680. On the other hand, the UE 653 may stop PDCCH monitoring earlier during the active time 685, e.g., after receiving the Type 2 LP-WUS.
[0057] For further UE power saving benefits, in some example embodiments, the DCI format 2_9 may not be configured when the Type 2 WUS is configured. In these example embodiments, the Type 2 LP-WUS may be monitored both outside and within the C-DRX active times as described in the examples above.
[0058] In other example embodiments, if both DCI format 2_9 and Type 2 LP-WUS are configured, the UE may only monitor for the Type 2 LP-WUS outside the C-DRX active times, e.g., because the UE may monitor for the DCI format 2_9 within the C-DRX active times for cell DTX activation.
[0059] In Case 0, when both Type 1 LP-WUS and Type 2 LP-WUS are implemented, various operations may be used to distinguish the different functions. In some example embodiments, two LP-WUS configurations (e.g., time and / or frequency difference) may be used. For example, a first LP-WUS configuration may be used for triggering PDCCH (e.g., Type 1 LP-WUS) and a second LP-WUS configuration may be used for activating cell DTX (e.g., Type 2 LP-WUS) .
[0060] In other example embodiments, one LP-WUS configuration (e.g., time and frequency are the same) may be used, but a sequence and / or a payload may be used to differentiate PDCCH triggering (e.g., Type 1 LP-WUS) or activating cell DTX (e.g., Type 2 LP-WUS) .
[0061] Turning now to Case 1 530 as illustrated in Fig. 5 where the cell and UE are within the cell DTX active period and within the C-DRX active time. In this Case 1 530, when the Type 1 LP-WUS is implemented as a standalone feature, the UE may implement the Option 403 for PDCCH monitoring. For example, if Type 1 LP-WUS is allowed / enabled, the defined behaviors for Option 403 may be used. If Type 1 LP-WUS is not allowed / enabled, the UE may not monitor for LP-WUS to trigger PDCCH monitoring.
[0062] In this Case 1 530, when the Type 2 LP-WUS is implemented as a standalone feature, the UE may monitor for Type 2 LP-WUS within C-DRX active times and, if the DCI format 2_9 is configured, the UE does not need to monitor for DCI format 2_9. In this implementation example, it is also possible that DCI format 2_9 may not be configured.
[0063] In this Case 1 530, when the Type 1 LP-WUS and the Type 2 LP-WUS are both implemented, both Type 1 LP-WUS and Type 2 LP-WUS may be monitored within the C-DRX active times and the cell DTX active periods. When the UE is monitoring for Type 1 LP-WUS, the benefit for the UE to also monitor for Type 2 LP-WUS is that when a Type 2 LP-WUS activates another serving cell DTX / DRX, the UE may not need to wake for monitoring for the DCI format 2_9. In this case, if only Option 401 is enabled, then two LP-WUS configurations (e.g., different time / frequency configurations) may be used. If Option 402 or Option 403 is enabled, then one LP-WUS configuration (e.g., same time / frequency configurations) may be used.
[0064] Turning now to Case 2 540 as illustrated in Fig. 5 where the cell is within the cell DTX active period but the UE is outside a C-DRX active time. In this Case 2 540, when the Type 1 LP-WUS is implemented as a standalone feature, in some example embodiments, only the Option 401 may be allowed / enabled. In these example embodiments, when the UE monitors for the LP-WUS before corresponding active times (e.g. MOs 445, 450, 455 of Fig. 4) , detection of the Type 1 LP-WUS triggers PDCCH monitoring in the corresponding active time (e.g., active times 410, 420, 430 of Fig. 4) and the UE may follow the same behavior when the cell DTX is activated, e.g., the UE may monitor for PDCCH in a portion of the corresponding C-DRX active time that overlaps with a cell DTX active period, e.g., the portion of active time 522 that overlaps with the cell DTX active period 512 of Fig. 5.
[0065] In other example embodiments, only the Option 402 may be allowed / enabled. In these example embodiments, the UE monitors for the LP-WUS outside of the C-DRX active times (e.g., MOs 460-475 of Fig. 4) and detection of a Type 1 LP-WUS may trigger PDCCH monitoring in a legacy C-DRX active time (e.g., active times 420 or 430) or in a new duration, e.g., LP trigger duration 480. When the PDCCH monitoring is triggered for a C-DRX active time or an LP trigger duration and the cell is in a DTX active period, the UE may operate as if cell DTX is not configured, e.g., the UE monitors for PDCCH in the corresponding C-DRX active time or LP trigger duration without regard to the cell DTX operation. When the PDCCH monitoring is triggered for a C-DRX active time or an LP trigger duration and the cell is outside a cell DTX active period, the UE behavior may follow the description provided below for the Case 4 560 for this scenario. Since the details for this scenario are described in detail below for the Case 4 560, it will not be described here.
[0066] In this Case 2 540, when the Type 2 LP-WUS is implemented as a standalone feature, the UE may monitor for Type 2 LP-WUS deactivating cell DTX / DRX of the serving cell (e.g., because in Case 2 540, the scenario is that the serving cell is in an active period of cell DTX / DRX. In addition, the UE may monitor for Type 2 LP-WUS that activates cell DTX / DRX of another serving cell. The benefits of this configuration are similar to that described above with reference to the Case 0, e.g., network overhead reduction based on a one Type 2 LP-WUS indicating to a group of UEs either outside or within C-DRX Active Time, UE power saving based on the UE does not need to wake up for DCI format 2_9, etc.
[0067] In this Case 2 540, when the Type 1 LP-WUS and the Type 2 LP-WUS are both implemented, the UE behavior may be similar to that described above for Case 0 or Case 1 530 when both Type 1 LP-WUS and the Type 2 LP-WUS are implemented. Since the UE behavior is similar to that described above, it will not be described again.
[0068] Turning now to Case 3 550 as illustrated in Fig. 5 where the cell and UE are both outside the cell DTX active period and the C-DRX active time. Some of the example embodiments are described with reference to Fig. 7 that shows example scenarios for Case 3 550 where the cell and UE are both outside the cell DTX active period and the C-DRX active time according to various example embodiments.
[0069] In this Case 3 550, when the Type 1 LP-WUS is implemented as a standalone feature, in some example embodiments, the Option 401 may be allowed / enabled, e.g., the UE monitors for Type 1 LP-WUS prior to corresponding active times (e.g., the MO 710) . In a first alternative, the UE may monitor for Type 1 LP-WUS for PDCCH triggering. In a first option of this alternative, detection of the LP-WUS triggers the active time (e.g., detection of Type 1 LP-WUS in MO 710 triggers active time 720) , but the UE does not monitor PDCCH for the portion of the active time that does not overlap with a cell DTX active period. For example, if the UE detects a Type 1 LP-WUS during MO 710 triggering the active time 720, the UE may not monitor PDCCH for the portion 725 of the active time 720 that does not overlap with the cell DTX active period 730. When the active time is active, the CSI measurement and reporting (e.g., radio link monitoring (RLM) , radio resource monitoring (RRM) and bean failure detection (BFD) ) may or may not be configured. This option may aid in UE power saving because the UE may not monitor PDCCH outside the cell DTX active period.
[0070] In a second option of the first alternative, detection of the Type 1 LP-WUS triggers the corresponding active time and the UE monitors PDCCH during the entirety of the active time. For example, if the UE detects a Type 1 LP-WUS in MO 710 triggering the active time 720, the UE may monitor PDCCH for the entire active time 720 without regard to the cell DTX 730. In this second option, in some example embodiments, the UE may monitor all search spaces / PDCCH formats during the portion 725 when the cell DTX is not active. In other example embodiments of this second option, only a subset of search space / PDCCH formats are monitored, e.g., DCI format 2_9 within the triggered duration for cell DTX activation / deactivation, DCI formats for Physical Downlink Shared Channel (PDSCH) transmission, DCI formats for aperiodic CSI (AP-CSI) reporting, etc., when the cell DTX is not active.
[0071] In a second alternative, the UE may not monitor for Type 1 LP-WUS for PDCCH triggering during the cell DTX non-active periods, e.g., the UE does not monitor for Type 1 LP-WUS during the MO 710 that is outside a cell DTX active period. This alternative results in a large power saving for the UE but may not accommodate shorter latencies.
[0072] In other example embodiments of Case 3 550, the Option 402 may be allowed / enabled, e.g., monitoring for Type 1 LP-WUS that may not correspond to a C-DRX active time such as MO 740. In these example embodiments, in a first alternative, when a Type 1 LP-WUS is detected, the UE may perform PDCCH monitoring during a C-DRX active time 720 or an LP trigger duration 750 based on the same examples, alternatives and options described above for the Option 401.
[0073] In a second alternative, the UE may skip monitoring for some or all Type 1 LP-WUS for PDCCH triggering. In a first option, the UE may not monitor for any Type 1 LP-WUS for PDCCH triggering in Case 3 550. In a second option, if Type 1 LP-WUS detection (e.g., in MO 740) triggers both a C-DRX active time (e.g., active time 720) and the LP trigger duration (e.g., LP trigger duration 750) when cell DTX is not configured (e.g., the cell is operating under normal conditions) , then outside a cell DTX active period, the UE may only monitor for the Type 1 LP-WUS that triggers the C-DRX active time, e.g., in the MO 710.
[0074] In this Case 3 550, when the Type 2 LP-WUS is implemented as a standalone feature, the UE may monitor for Type 2 LP-WUS to activate / deactivate the cell DTX / DRX outside of the cell DTX active period. When a Type 2 LP-WUS is detected, the UE may deactivate a cell DTX pattern of the serving cell that cell DTX / DRX that is already activated or the UE may activate cell DTX / DRX of another serving cell. This allows for faster wakeup of the UE because if this was not implemented, the UE may only wakeup in the next cell DTX active period.
[0075] In this Case 3 550, when the Type 1 LP-WUS and the Type 2 LP-WUS are both implemented, in some example embodiments, the UE behavior described above for the Type 1 LP-WUS monitoring and the Type 2 LP-WUS monitoring for the Case 3 550 may be simultaneously enabled, e.g., both functionalities may coexist in Cas 3 550.
[0076] There may be an exception to this coexistence. If the Type 1 LP-WUS is enabled with the second option of the first alternative, where detection of the Type 1 LP-WUS triggers the corresponding active time and the UE monitors PDCCH during the entirety of the active time, the UE may not monitor for Type 2 LP-WUS during the active time. This may be to avoid the simultaneous monitoring for PDCCH and Type 2 LP-WUS that may provide the same information, e.g., cell DTX / DRX activation / deactivation.
[0077] Turning now to Case 4 560 as illustrated in Fig. 5 where the cell is outside the cell DTX active period but the UE is within the C-DRX active time (or the LP trigger duration) according to various example embodiments. Some of the example embodiments are described with reference to Fig. 8 that shows example scenarios for Case 4 560 where the cell is outside the cell DTX active period but the UE is within the C-DRX active time according to various example embodiments.
[0078] In this Case 4 560, when the Type 1 LP-WUS is implemented as a standalone feature, in some example embodiments, the Option 403 may be allowed / enabled, e.g., the UE may monitor for Type 1 LP-WUS in the C-DRX active time (or LP trigger duration) . In a first alternative of these example embodiments, the UE may monitor for the Type 1 LP-WUS but does not monitor PDCCH, e.g., the UE does not monitor PDCCH outside the cell DTX active period. For example, in Fig. 8, the Case 4 560 may be defined as two sub-cases, Case 4a 801 and Case 4b 802. The Case 4a 801 is a scenario where the C-DRX active time 810 has a beginning portion 815 that is outside the cell DTX active period 820. The Case 4b 802 is a scenario where the C-DRX active time 830 has an ending portion 835 that is outside the cell DTX active period 820. In the first alternative, the UE may monitor for Type 1 LP-WUS in the beginning portion 815 of C-DRX active time 810 or the ending portion 835 of C-DRX active time 830 but not monitor for PDCCH in these portions.
[0079] In a first option of the first alternative, the cell DTX may be activation / deactivation signaling for LP-WUS monitoring. For example, in Case 4a 801, when entering the cell DTX active period (e.g., the portion of the active time 810 after the portion 815) , the UE may switch from Type 1 LP-WUS monitoring to PDCCH monitoring, e.g., monitoring PDCCH in the active time 810 that overlaps with the cell DTX active period 820. In Case 4b 802, when exiting the cell DTX active period (e.g., the portion of the active time 830 before the portion 835) , the UE may switch the PDCCH monitoring to activate Type 1 LP-WUS monitoring, e.g., monitoring for Type 1 LP-WUS in the portion 835 of the active time 830 that does not overlap with the cell DTX active period 820.
[0080] In a second option of the first alternative, whether Type 1 LP-WUS monitoring is activated / deactivated when entering / exiting the cell DTX active period uses explicit signaling. For example, for Case 4a 801, if no LP-WUS is detected in portion 815, the UE may continue to monitor for Type 1 LP-WUS when entering the cell DTX active period 820 until a Type 1 LP-WUS triggering PDCCH is detected. For Case 4b 802, if no explicit signaling is received before the end of cell DTX active period 820, the Type 1 LP-WUS monitoring is not activated when exiting the cell DTX active period 820.
[0081] In a second alternative of Option 403 for the Case 4 560, the UE may not monitor for Type 1 LP-WUS and also may not monitor for PDCCH outside of the cell DTX active period 820. For example, for Case 4a 801, the UE may not monitor for Type 1 LP-WUS or PDCCH during the portion 815 of the active time 810. For Case 4b 802, the UE may not monitor for Type 1 LP-WUS or PDCCH during the portion 835 of the active time 830.
[0082] In a third alternative of Option 403 for the Case 4 560, the UE may not monitor LP-WUS but monitors for PDCCH outside of the cell DTX active period 820. For example, for Case 4a 801, the UE may not monitor for Type 1 LP-WUS but does monitor for PDCCH during the portion 815 of the active time 810. For Case 4b 802, the UE may not monitor for Type 1 LP-WUS but does monitor for PDCCH during the portion 835 of the active time 830. In this alternative, the UE may be configured to monitor for all search spaces / DCI formats or only a subset of search spaces / DCI formats as was described above.
[0083] In other example embodiments, if the Option 403 is not allowed / enabled, e.g., the UE does not monitor for Type 1 LP-WUS within the C-DRX active time, in a first alternative, the UE may not monitor for Type 1 LP-WUS or PDCCH outside of the cell DTX active period. For example, for Case 4a 801, the UE may not monitor for Type 1 LP-WUS or PDCCH during the portion 815 of the active time 810. For Case 4b 802, the UE may not monitor for Type 1 LP-WUS or PDCCH during the portion 835 of the active time 830.
[0084] In a second alternative, the UE may not monitor for Type 1 LP-WUS but may monitor for PDCCH outside of the cell DTX active period. For example, for Case 4a 801, the UE may not monitor for Type 1 LP-WUS but may monitor for PDCCH during the portion 815 of the active time 810. For Case 4b 802, the UE may not monitor for Type 1 LP-WUS but may monitor for PDCCH during the portion 835 of the active time 830.
[0085] In this Case 4 560, when the Type 2 LP-WUS is implemented as a standalone feature, the UE may monitor for Type 2 LP-WUS during portions of the C-DRX On-Durations that are outside of the cell DTX active period, e.g., in portion 815 of active time 810 and portion 835 of active time 830. This allows the Type 2 LP-WUS to deactivate the cell DTX / DRX pattern of the current serving cell that is activated with a cell DTX / DRX pattern and allow the UE to begin PDCCH monitoring earlier. Also, if the Type 2 LP-WUS activates the cell DTX / DRX pattern of another serving cell, this may save UE power on that serving cell because then UE may stop PDCCH monitoring in that serving cell even if the active time is still running.
[0086] In this Case 4 560, when the Type 1 LP-WUS and the Type 2 LP-WUS are both implemented, in some example embodiments, the UE behavior described above for the Type 1 LP-WUS monitoring and the Type 2 LP-WUS monitoring for the Case 4 560 may be simultaneously enabled, e.g., both functionalities may coexist in Case 4 560. When Type 1 LP-WUS Option 403 and Type 2 LP-WUS are both enabled, a single LP-WUS configuration (e.g., same time and frequency resources) with a different sequence / payload may be used.
[0087] Examples
[0088] In a first example, a method, comprising processing, based on signaling received from a base station, a Connected Discontinuous Reception (C-DRX) configuration, processing, based on signaling received from a base station, a cell Discontinuous Transmission (DTX) configuration or a cell Discontinuous Reception (DRX) configuration and operating in accordance with the C-DRX configuration and cell DTX configuration or cell DRX configuration, wherein the C-DRX configuration indicates that a C-DRX cycle is activated and the cell DTX configuration and cell DRX configuration indicate that cell DTX and cell DRX are not activated.
[0089] In a second example, the method of the first example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) , wherein detection of the Type 1 LP-WUS activates Physical Downlink Control Channel (PDCCH) monitoring during an active time of the C-DRX cycle or an LP trigger duration triggered by the LP-WUS.
[0090] In a third example, the method of the second example, wherein the processing circuitry monitors for the Type 1 LP-WUS outside of active times of the C-DRX cycle.
[0091] In a fourth example, the method of the second example, wherein the processing circuitry monitors for the Type 1 LP-WUS within the active time of the C-DRX cycle.
[0092] In a fifth example, the method of the first example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) , wherein detection of the Type 2 LP-WUS activates one of the cell DTX or cell DRX, wherein the cell DTX or cell DRX is activated a predetermined time after receiving the Type 2 LP-WUS.
[0093] In a sixth example, the method of the fifth example, wherein the processing circuitry monitors for the Type 2 LP-WUS outside of active times of the C-DRX cycle.
[0094] In a seventh example, the method of the sixth example, wherein, when a DCI format 2_9 is configured, the processing circuitry only monitors for the Type 2 LP-WUS outside of the active times of the C-DRX cycle.
[0095] In an eighth example, the method of the sixth example, wherein the processing circuitry monitors for the Type 2 LP-WUS within the active times of the C-DRX cycle.
[0096] In a ninth example, the method of the eighth example, wherein a DCI format 2_9 is not configured.
[0097] In a tenth example, the method of the second example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) , wherein detection of the Type 2 LP-WUS activates one of the cell DTX or cell DRX, wherein the cell DTX or cell DRX is activated a predetermined time after receiving the Type 2 LP-WUS.
[0098] In an eleventh example, the method of the tenth example, wherein the Type 1 LP-WUS has a first configuration comprising first time and first frequency resources and the Type 2 LP-WUS has a second configuration comprising second time and second frequency resources, wherein at least one of the first time and second time resources or the first frequency and second frequency resources are different.
[0099] In a twelfth example, the method of the tenth example, wherein the Type 1 LP-WUS and Type 2 LP-WUS have a configuration comprising time and frequency resources, wherein one of a sequence or a payload differentiates the Type 1 LP-WUS and Type 2 LP-WUS in the time and frequency resources.
[0100] In a thirteenth example, a processor configured to perform any of the methods of the first through twelfth examples.
[0101] In a fourteenth example, a user equipment (UE) configured to perform any of the methods of the first through twelfth examples.
[0102] In a fifteenth example, a method comprising processing, based on signaling received from a base station, a Connected Discontinuous Reception (C-DRX) configuration, processing, based on signaling received from a base station, a cell Discontinuous Transmission (DTX) configuration or a cell Discontinuous Reception (DRX) configuration and operating in accordance with the C-DRX configuration and cell DTX configuration or cell DRX configuration, wherein the C-DRX configuration indicates that a C-DRX cycle is activated and the cell DTX configuration or cell DRX configuration indicate that cell DTX or cell DRX is activated.
[0103] In a sixteenth example, the method of the fifteenth example, wherein a portion of an active time of the C-DRX cycle and a portion of an active period of the cell DTX or cell DRX overlap.
[0104] In a seventeenth example, the method of the sixteenth example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell DRX, wherein detection of the Type 1 LP-WUS activates Physical Downlink Control Channel (PDCCH) monitoring during the portion of the active time of the C-DRX cycle.
[0105] In an eighteenth example, the method of the sixteenth example, further comprising omitting monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell.
[0106] In a nineteenth example, the method of the sixteenth example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0107] In a twentieth example, the method of the nineteenth example, wherein a DCI format 2_9 is not configured.
[0108] In a twenty first example, the method of the nineteenth example, wherein a DCI format 2_9 is configured, wherein the method further comprises omitting monitoring for a DCI format 2_9 within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell DRX.
[0109] In a twenty second example, the method of the seventeenth example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0110] In a twenty third example, the method of the fifteenth example, wherein a portion of an active period of the cell DTX or cell DRX overlaps with a portion of outside of the active time the C-DRX cycle.
[0111] In a twenty fourth example, the method of the twenty third example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of the active period of the cell DTX or cell DRX, wherein the LP-WUS occurs before an active time of the C-DRX cycle but corresponds to the active time of the C-DRX cycle, wherein detection of the Type 1 LP-WUS activates Physical Downlink Control Channel (PDCCH) monitoring during the active time of the C-DRX cycle.
[0112] In a twenty fifth example, the method of the twenty third example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of the active period of the cell DTX or cell DRX, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle or an LP trigger duration timer.
[0113] In a twenty sixth example, the method of the twenty fifth example, wherein, when the active time timer or the LP trigger duration timer is running and the cell DTX or cell DRX is in an active period, the method further comprising monitoring a Physical Downlink Control Channel (PDCCH) .
[0114] In a twenty seventh example, the method of the twenty fifth example, wherein, when the active time timer or the LP trigger duration timer is running and the cell DTX or cell DRX is in an inactive period, the method further comprising omitting monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle that overlaps with the cell DTX or cell DRX inactive period.
[0115] In a twenty eighth example, the method of the twenty fifth example, wherein, when the active time timer or the LP trigger duration timer is running and the cell DTX or cell DRX is in an inactive period, the method further comprising monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle that overlaps with the cell DTX or cell DRX inactive period.
[0116] In a twenty ninth example, the method of the twenty third example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active period of the cell DTX or cell DRX, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0117] In a thirtieth example, the method of the twenty fourth example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active period of the cell DTX or cell DRX, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0118] In a thirty first example, the method of the fifteenth example, wherein a portion of an inactive period of the cell DTX or cell DRX overlaps with a portion of outside of the active time of the C-DRX cycle.
[0119] In a thirty second example, the method of the thirty first example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time of the C-DRX cycle that occurs before an active time of the C-DRX cycle, wherein the LP-WUS corresponds to the active time of the C-DRX cycle, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle and omitting monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle that overlaps with the inactive period of the cell DTX or cell DRX.
[0120] In a thirty third example, the method of the thirty first example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of outside of the active time of the C-DRX cycle that occurs before an active time, wherein the LP-WUS corresponds to the active time of the C-DRX cycle, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle and monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle that with the inactive period of the cell DTX or cell DRX.
[0121] In a thirty fourth example, the method of the thirty third example, wherein the PDCCH is monitored for one of all PDCCH formats or a subset of PDCCH formats.
[0122] In a thirty fifth example, the method of the thirty first example, further comprising omitting monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of the outside of the active time the C-DRX cycle that occurs before an active time.
[0123] In a thirty sixth example, the method of the thirty first example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle or an LP trigger duration timer and omitting monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time or LP trigger duration that overlaps with the inactive period of the cell DTX or cell DRX.
[0124] In a thirty seventh example, the method of the thirty first example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle or an LP trigger duration timer and monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle of LP trigger duration that overlaps with inactive period of the cell DTX or cell DRX.
[0125] In a thirty eighth example, the method of the thirty first example, further comprising omitting monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of outside of the active time of the C-DRX cycle that overlaps with the portion of the inactive period of the cell DTX or cell DRX.
[0126] In a thirty ninth example, the method of the thirty first example, wherein, when receipt of a Type 1 Low Power Wakeup Signal (LP-WUS) triggers an active time timer and an LP trigger duration timer when cell DTX is not configured, the method further comprising monitoring for a Type 1 LP-WUS that in the portion of outside of the active time of the C-DRX cycle that overlaps with the portion of the inactive period of the cell DTX or cell DRX, wherein detection of the Type 1 LP-WUS activates the active time timer of the C-DRX cycle.
[0127] In a fortieth example, the method of the thirty first example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) in the portion of outside of the active time of the C-DRX cycle that overlaps with the portion of the inactive period of the cell DTX or cell DRX, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0128] In a forty first example, the method of the thirty first example, further comprising omitting monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) in the outside of the active time duration of the C-DRX cycle that overlaps with the portion of the inactive period of the cell DTX or cell DRX.
[0129] In a forty second example, the method of the fifteenth example, wherein a first portion of an active time of the C-DRX cycle overlaps with a first portion of an inactive period of the cell DTX or cell DRX and a second portion of the active time of the C-DRX cycle overlaps with a second portion of an active period of the cell DTX or cell DRX.
[0130] In a forty third example, the method of the forty second example, further comprising monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) within the first portion of the active time of the C-DRX cycle.
[0131] In a forty fourth example, the method of the forty third example, further comprising omit monitoring for a Physical Downlink Control Channel (PDCCH) in the first portion of the active time of the C-DRX cycle.
[0132] In a forty fifth example, the method of the forty third example, wherein the first portion of the active time occurs before the second portion of the active time, wherein, when the second portion of active time commences, the method further comprising discontinuing monitoring for the Type 1 LP-WUS and monitoring for a Physical Downlink Control Channel (PDCCH) during the second portion of the active time.
[0133] In a forty sixth example, the method of the forty third example, wherein the first portion of the active time occurs after the second portion of the active time, wherein, when the first portion of active time commences, the monitoring of the Type 1 LP-WUS is activated.
[0134] In a forty seventh example, the method of the forty third example, wherein the first portion of the active time occurs before the second portion of the active time, wherein, the processing circuitry monitors for the Type 1 LP-WUS in the active time until the Type 1 LP-WUS is received and, wherein the method further comprises, when the Type 1 LP-WUS is received, monitoring for a Physical Downlink Control Channel (PDCCH) during the second portion of the active time.
[0135] In a forty eighth example, the method of the forty third example, wherein the first portion of the active time occurs after the second portion of the active time, wherein, when the first portion of active time commences, the monitoring of the Type 1 LP-WUS is activated based on receipt of explicit signaling.
[0136] In a forty ninth example, the method of the forty second example, further comprising omitting monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) or a Physical Downlink Control Channel (PDCCH) in the first portion of the active time of the C-DRX cycle.
[0137] In a fiftieth example, the method of the forty second example, further comprising omitting monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the first portion of the active time of the C-DRX cycle and monitoring for a Physical Downlink Control Channel (PDCCH) in the first portion of the active time of the C-DRX cycle.
[0138] In a fifty first example, the method of the forty second example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) within the first portion of the active time of the C-DRX cycle, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0139] In a fifty second example, the method of the forty third example, further comprising monitoring for a Type 2 Low Power Wakeup Signal (LP-WUS) within the first portion of the active time of the C-DRX cycle, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.
[0140] In a fifty third example, a processor configured to perform any of the methods of the fifteenth through fifty second examples.
[0141] In a fifty fourth example, a user equipment (UE) configured to perform any of the methods of the fifteenth through fifty second examples.
[0142] Those skilled in the art will understand that the above-described example embodiments may be implemented in any suitable software or hardware configuration or combination thereof. An example hardware platform for implementing the example embodiments may include, for example, an Intel x86 based platform with compatible operating system, a Windows OS, a Mac platform and MAC OS, a mobile device having an operating system such as iOS, Android, etc. The example embodiments of the above described method may be embodied as a program containing lines of code stored on a non-transitory computer readable storage medium that, when compiled, may be executed on a processor or microprocessor.
[0143] Although this application described various embodiments each having different features in various combinations, those skilled in the art will understand that any of the features of one embodiment may be combined with the features of the other embodiments in any manner not specifically disclaimed or which is not functionally or logically inconsistent with the operation of the device or the stated functions of the disclosed embodiments.
[0144] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature of authorized use should be clearly indicated to users.
[0145] It will be apparent to those skilled in the art that various modifications may be made in the present disclosure, without departing from the spirit or the scope of the disclosure. Thus, it is intended that the present disclosure cover modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalent.
Claims
1.An apparatus comprising processing circuitry configured to:process, based on signaling received from a base station, a Connected Discontinuous Reception (C-DRX) configuration;process, based on signaling received from a base station, a cell Discontinuous Transmission (DTX) configuration or a cell Discontinuous Reception (DRX) configuration; andoperate in accordance with the C-DRX configuration and cell DTX configuration or cell DRX configuration, wherein the C-DRX configuration indicates that a C-DRX cycle is activated and the cell DTX configuration and cell DRX configuration indicate that cell DTX and cell DRX are not activated.2.The apparatus of claim 1, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) , wherein detection of the Type 1 LP-WUS activates Physical Downlink Control Channel (PDCCH) monitoring during an active time of the C-DRX cycle or an LP trigger duration triggered by the LP-WUS.3.The apparatus of claim 1, wherein the processing circuitry is further configured to:monitor for a Type 2 Low Power Wakeup Signal (LP-WUS) , wherein detection of the Type 2 LP-WUS activates one of the cell DTX or cell DRX, wherein the cell DTX or cell DRX is activated a predetermined time after receiving the Type 2 LP-WUS.4.The apparatus of claim 2, wherein the processing circuitry is further configured to:monitor for a Type 2 Low Power Wakeup Signal (LP-WUS) , wherein detection of the Type 2 LP-WUS activates one of the cell DTX or cell DRX, wherein the cell DTX or cell DRX is activated a predetermined time after receiving the Type 2 LP-WUS.5.An apparatus comprising processing circuitry configured to:process, based on signaling received from a base station, a Connected Discontinuous Reception (C-DRX) configuration;process, based on signaling received from a base station, a cell Discontinuous Transmission (DTX) configuration or a cell Discontinuous Reception (DRX) configuration; andoperate in accordance with the C-DRX configuration and cell DTX configuration or cell DRX configuration, wherein the C-DRX configuration indicates that a C-DRX cycle is activated and the cell DTX configuration or cell DRX configuration indicate that cell DTX or cell DRX is activated.6.The apparatus of claim 5, wherein a portion of an active time of the C-DRX cycle and a portion of an active period of the cell DTX or cell DRX overlap.7.The apparatus of claim 6, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell DRX, wherein detection of the Type 1 LP-WUS activates Physical Downlink Control Channel (PDCCH) monitoring during the portion of the active time of the C-DRX cycle.8.The apparatus of claim 6, wherein the processing circuitry is further configured to:omit monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell.9.The apparatus of claim 6, wherein the processing circuitry is further configured to:monitor for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.10.The apparatus of claim 7, wherein the processing circuitry is further configured to:monitor for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active time of the C-DRX cycle that overlaps with the active period of the cell DTX or cell, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.11.The apparatus of claim 5, wherein a portion of an active period of the cell DTX or cell DRX overlaps with a portion outside of the active time of the C-DRX cycle.12.The apparatus of claim 11, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of the active period of the cell DTX or cell DRX, wherein the LP-WUS occurs before an active time of the C-DRX cycle but corresponds to the active time of the C-DRX cycle, wherein detection of the Type 1 LP-WUS activates Physical Downlink Control Channel (PDCCH) monitoring during the active time of the C-DRX cycle.13.The apparatus of claim 11, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion of the active period of the cell DTX or cell DRX, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle or an LP trigger duration timer.14.The apparatus of claim 11, wherein the processing circuitry is further configured to:monitor for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active period of the cell DTX or cell DRX, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.15.The apparatus of claim 12, wherein the processing circuitry is further configured to:monitor for a Type 2 Low Power Wakeup Signal (LP-WUS) within the portion of the active period of the cell DTX or cell DRX, wherein detection of the Type 2 LP-WUS deactivates one of the cell DTX or cell DRX for a current serving cell or activates cell DTX or cell DRX for another serving cell.16.The apparatus of claim 5, wherein a portion of an inactive period of the cell DTX or cell DRX overlaps with a portion outside of the active time of the C-DRX cycle.17.The apparatus of claim 16, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time of the C-DRX cycle that occurs before an active time of the C-DRX cycle, wherein the LP-WUS corresponds to the active time of the C-DRX cycle, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle; andomit monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle that overlaps with the inactive period of the cell DTX or cell DRX.18.The apparatus of claim 16, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time of the C-DRX cycle that occurs before an active time, wherein the LP-WUS corresponds to the active time of the C-DRX cycle, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle; andmonitor a Physical Downlink Control Channel (PDCCH) within a portion of the active time of the C-DRX cycle that with the inactive period of the cell DTX or cell DRX.19.The apparatus of claim 16, wherein the processing circuitry is further configured to:omit monitoring for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time of the C-DRX cycle that occurs before an active time.20.The apparatus of claim 16, wherein the processing circuitry is further configured to:monitor for a Type 1 Low Power Wakeup Signal (LP-WUS) in the portion outside of the active time, wherein detection of the Type 1 LP-WUS activates an active time timer of the C-DRX cycle or an LP trigger duration timer; andandomit monitoring a Physical Downlink Control Channel (PDCCH) within a portion of the active time or LP trigger duration that overlaps with the inactive period of the cell DTX or cell DRX.
Citation Information
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