Method and apparatus for signal processing

Abstract

A method for use in a user equipment (UE) is disclosed, wherein a medium access control (MAC) entity of the UE comprises a primary discontinuous reception (DRX) group and a secondary DRX group. The method comprises monitoring a control channel for receiving downlink control information (DCI) in at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

Description

TECHNICAL FIELD

[0001] The present application relates generally to wireless communications. BACKGROUND

[0002] In the fifth generation (5G) mobile communication system, some new technologies / features are applied compared to the previous mobile communication systems, including a wake-up or no-wake-up indication / signal (carried by downlink control information (DCI) format 2_6 in 5G communication system) for indicating whether to start the corresponding timer or not, a drx-onDurationTimer (DRX on-duration timer) for the next long discontinuous reception (DRX) cycle, a dormancy indication (carried by DCI format 2_6 in 5G) outside of the active time for indicating the dormancy behavior of one or more secondary cells (SCells) when carrier aggregation is used, and a dormancy indication (carried by DCI format 0_1 / 1_1 in 5G) inside of the active time for indicating the presence of SCell dormancy behavior and secondary discontinuous reception (DRX) group.

[0003] The following definitions are used throughout this disclosure:

[0004] PCell: Primary cell. The primary cell of the master cell group (MCG), operating on the primary frequency in which the user equipment (UE) performs the initial connection establishment procedure or initiates the connection re-establishment procedure.

[0005] PSCell: Primary secondary cell. The primary secondary cell of the secondary cell group (SCG) cell. For dual connectivity operation, the PSCell is the cell on which the UE performs random access when performing reconfiguration with synchronization.

[0006] SCell: Secondary cell. For UEs configured with carrier aggregation, a secondary cell provides additional radio resources on top of a special cell (see below).

[0007] SpCell: Special cell. For dual connectivity operation, the term special cell refers to the PCell of the MCG or the PSCell of the SCG, otherwise, the term special cell refers to the PCell.

[0008] Serving cell: For UEs connected with radio resource control and not configured with carrier aggregation / dual active, there is only one serving cell including the primary cell. For UEs connected with radio resource control and configured with carrier aggregation / dual active, the term ‘serving cell’ is used to denote the set of cells including the special cell(s) and all secondary cells.

[0009] In 5G standard protocol release 16, a user equipment / terminal configured with DRX mode operation in PCell or SpCell can monitor DCI format 2_6. Wake-up indication bit in DCI format 2_6 can indicate that the UE should start or not start drx-onDurationTimer in the next long DRX cycle. Bitmap immediately after the location of the wake-up indication bit can indicate the dormancy behavior of SCell group by indicating the switching between dormant bandwidth parts (BWPs) and non-dormant BWPs. And, the UE does not monitor PDCCH during the active time to detect DCI format 2_6.

[0010] If a UE has an activated search space set for monitoring physical downlink control channel (PDCCH) in order to detect DCI format 0_1 and DCI format 1_1, and if one or both of DCI format 0_1 and DCI format 1_1 includes a SCell dormancy indication field, the UE can change the dormancy behavior of the SCell group according to the SCell dormancy indication field carried by DCI format 0_1 / 1_1.

[0011] The members of the SCell group outside the active time and inside the active time can be different, and the SCell group outside the active time is configured by the parameter dormancyGroupOutsideActiveTime (dormancy group outside active time), and the SCell group inside the active time is configured by the parameter dormancyGroupInsideActiveTime (dormancy group inside active time).

[0012] A serving cell of a medium access control (MAC) entity of a UE can be configured in two DRX groups by higher layer signaling (e.g., RRC parameters). When RRC does not configure a secondary DRX group, there is only one DRX group. When two DRX groups are configured, each group of serving cells (referred to as a DRX group) is configured by RRC with its own set of parameters: drx-onDurationTimer, drx-InactivityTimer. When two DRX groups are configured, the two groups share the following parameter values: drx-SlotOffset, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, drx-LongCycleStartOffset, drx-ShortCycle (optional), drx-ShortCycleTimer (optional), drx-HARQ-RTT-TimerDL, and drx-HARQ-RTT-TimerUL. The parameter drx-LongCycleStartOffset defines the long DRX cycle and drx-StartOffset, which defines the subframe in which the long DRX cycle and short DRX cycle start. The parameter drx-ShortCycle defines the short DRX cycle. The parameter drx-ShortCycleTimer defines the duration for which the UE shall follow the short DRX cycle. Although the above scenarios are described with the 5G framework, one of ordinary skill in the art can understand that the above cases are not limited to this, but also exist in other communication systems.

[0013] Since the secondary DRX group function is not enabled when the wake-up signal (WUS) and sleep indication function are introduced, an incompatible or ambiguous operation can occur when the secondary DRX group and WUS and / or sleep indication are applied at the same time. To solve this problem, the present disclosure provides a scheme for simultaneously using the secondary DRX group function and the WUS and / or sleep indication function. SUMMARY

[0014] In general, the present application relates to methods, systems, and devices for receiving downlink control information for multiple DRX groups, and more particularly, to methods, systems, and devices for receiving downlink control information for a primary DRX group and a secondary DRX group.

[0015] The present disclosure relates to a method for use in a user equipment (UE), wherein a medium access control (MAC) entity of the UE comprises a primary discontinuous reception (DRX) group and a secondary DRX group. The method comprises monitoring a control channel for receiving a downlink control information (DCI) in at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

[0016] Various embodiments can preferably implement the following features:

[0017] Preferably, the DCI is a first DCI received outside of an active time of at least one of the primary DRX group or the secondary DRX group, wherein the first DCI comprises a wake-up indication.

[0018] Preferably, at a physical downlink control channel monitoring occasion before a next DRX cycle, the method comprises receiving the first DCI on a first cell of the primary DRX group.

[0019] Preferably, at a physical downlink control channel monitoring occasion before a next DRX cycle, the method comprises receiving the first DCI on a second cell of the secondary DRX group.

[0020] Preferably, at a physical downlink control channel monitoring occasion before a next DRX cycle, the method comprises receiving the first DCI on a first cell of the primary DRX group and receiving the first DCI on a second cell of the secondary DRX group.

[0021] Preferably, at least one serving cell in the primary DRX group follows the wake-up indication.

[0022] Preferably, at least one serving cell in the secondary DRX group follows the wake-up indication.

[0023] Preferably, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the wake-up indication.

[0024] Preferably, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow a wake-up indication of the first DCI based on at least one of a predefined information, a higher layer signaling or C bits in the first DCI, wherein C≥1.

[0025] Preferably, the higher layer signaling comprises at least one of a radio resource control parameter or a MAC control entity.

[0026] Preferably, the wake-up indication comprises M bits indicating whether to start a timer associated with a DRX on-duration for the primary DRX group and the secondary DRX group, where M≥1.

[0027] Preferably, the wake-up indication comprises N=N1+N2 bits, where N≥1, N1 is a number of bits indicating whether to start a timer associated with a DRX on-duration for the primary DRX group, and N2 is a number of bits indicating whether to start a timer associated with a DRX on-duration for the secondary DRX group.

[0028] Preferably, monitoring a control channel for receiving the DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group comprises monitoring a control channel for receiving the first DCI at a physical downlink control channel monitoring occasion before a next DRX cycle, wherein the first DCI is not detected, wherein one parameter is predefined to indicate whether to start a timer associated with a DRX on-duration in the next DRX cycle for the primary DRX group and the secondary DRX group, or two parameters are predefined to indicate whether to start a timer associated with a DRX on-duration in the next DRX cycle for the primary DRX group and the secondary DRX group, respectively.

[0029] Preferably, the DCI is a second DCI comprising a sleep indication, wherein the second DCI is received outside of an active time of at least one of the primary DRX group or the secondary DRX group, and the sleep indication indicates a sleep behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

[0030] Preferably, the method further comprises receiving the second DCI on a first cell of the primary DRX group.

[0031] Preferably, the method further comprises receiving the second DCI on a second cell of the secondary DRX group.

[0032] Preferably, the method further comprises receiving the second DCI on a first cell of the primary DRX group and monitoring the second DCI on a second cell of the secondary DRX group.

[0033] Preferably, at least one serving cell in the primary DRX group follows the sleep indication.

[0034] Preferably, at least one serving cell in the secondary DRX group follows the sleep indication.

[0035] Preferably, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the sleep indication.

[0036] Preferably, at least one serving cell in the secondary DRX group follows the dormancy indication of the second DCI based on higher layer signaling or based on N bits in the second DCI, where N > 1.

[0037] Preferably, the higher layer signaling comprises at least one of a radio resource control parameter or a MAC control entity.

[0038] Preferably, monitoring a control channel for receiving DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group comprises monitoring a control channel for the second DCI based on a DRX state of the primary DRX group.

[0039] Preferably, monitoring a control channel for receiving DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group comprises monitoring a control channel for the second DCI based on a DRX state of the secondary DRX group.

[0040] Preferably, monitoring a control channel for receiving DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group comprises monitoring a control channel for the second DCI based on DRX states of the primary DRX group and the secondary DRX group.

[0041] Preferably, the DCI is a third DCI comprising a dormancy indication, wherein the third DCI is received within an active time of at least one of the primary DRX group or the secondary DRX group, and the dormancy indication indicates a dormancy behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

[0042] Preferably, the method further comprises receiving the third DCI on a first cell of the primary DRX group.

[0043] Preferably, the method further comprises receiving the third DCI on a second cell of the secondary DRX group.

[0044] Preferably, the method further comprises receiving the third DCI on a first cell of the primary DRX group and monitoring the second DCI on a second cell of the secondary DRX group.

[0045] Preferably, monitoring a control channel for receiving DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group comprises:

[0046] monitoring a control channel for receiving the third DCI within an active time of the primary DRX group, wherein the primary DRX group is within the active time or both the primary DRX group and the secondary DRX group are within the active time.

[0047] Preferably, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the sleep indication of the third DCI.

[0048] Preferably, at least one serving cell in one of the primary DRX group and the secondary DRX group follow the sleep indication of the third DCI.

[0049] Preferably, the third DCI comprises N bits indicating whether the sleep indication is enabled for at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group, wherein N≥1.

[0050] Preferably, the sleep indication received in one of the primary DRX group and the secondary DRX group indicates a sleep behavior of at least one serving cell in the DRX group receiving the sleep indication.

[0051] Preferably, the sleep indication received in one of the primary DRX group and the secondary DRX group indicates a sleep behavior of at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group.

[0052] Preferably, the third DCI is received on a second cell of the secondary DRX group, wherein the at least one secondary cell follows the sleep indication when the third DCI does not comprise the scheduling information, or the at least one secondary cell follows the sleep indication when the third DCI does not comprise the scheduling information, or the at least one secondary cell follows the sleep indication regardless of whether the third DCI comprises the scheduling information.

[0053] Preferably, the DCI is a fourth DCI received outside an active time of at least one of the primary DRX group or the secondary DRX group, and the fourth DCI comprises a wake-up indication and a sleep indication.

[0054] Preferably, the method further comprises receiving the fourth DCI on a first cell of the primary DRX group.

[0055] Preferably, the method further comprises receiving the fourth DCI on a second cell of the secondary DRX group.

[0056] Preferably, the method further comprises receiving the fourth DCI on a first cell of the primary DRX group and receiving the fourth DCI on a second cell of the secondary DRX group.

[0057] Preferably, the fourth DCI indicates whether to start a timer associated with a DRX on-duration and a sleep behavior related operation in one of the primary DRX group and the secondary DRX group.

[0058] Preferably, the fourth DCI indicates the UE to start or not to start a timer associated with a DRX on-duration and a sleep behavior related operation in the primary DRX group and the secondary DRX group.

[0059] Preferably, monitoring a control channel for receiving the fourth DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group comprises:

[0060] Monitoring a control channel for receiving the fourth DCI on a first cell of the primary DRX group based on a DRX state of the primary DRX group.

[0061] Preferably, the method further comprises not monitoring a control channel for receiving the fourth DCI before the next long DRX cycle within the active time of one of the primary DRX group and the secondary DRX group, and preferably, when not monitoring a control channel for receiving the fourth DCI before the next long DRX cycle, starting a timer associated with a DRX on-duration in the next DRX cycle.

[0062] Preferably, at least one secondary cell in the primary DRX group and at least one secondary cell in the secondary DRX group follow at least one of the wake-up indication or the sleep indication.

[0063] Preferably, at least one secondary cell in the primary DRX group follows at least one of a wake-up indication or a sleep indication of the fourth DCI.

[0064] Preferably, at least one secondary cell in the secondary DRX group follows at least one of a wake-up indication or a sleep indication of the fourth DCI.

[0065] Preferably, the sleep indication is applied to at least one serving cell of the secondary DRX group based on at least one of a predefined information, a higher layer signaling or N bits in the fourth DCI, wherein N≥1.

[0066] Preferably, the higher layer signaling comprises at least one of a radio resource control parameter or a MAC control entity.

[0067] Preferably, the method further comprises receiving the DCI in one of the primary DRX group and the secondary DRX group, wherein the DCI comprises at least one of a first indication indicating a search space set group switch or a second indication indicating a physical downlink control channel (PDCCH) skip.

[0068] Preferably, at least one serving cell in the one of the primary DRX group and the secondary DRX group in which the DCI is received follows at least one of the first indication or the second indication.

[0069] Preferably, at least one serving cell in the other of the primary DRX group in which the DCI is not received ignores at least one of the first indication or the second indication.

[0070] Preferably, when the DCI is received within an active time of at least one of the primary DRX group or the secondary DRX group, the method comprises tracking at least one of the first indication or the second indication.

[0071] Preferably, the DCI is received outside an active time of at least one of the primary DRX group or the secondary DRX group, and the method further comprises ignoring at least one of the first indication or the second indication.

[0072] The present disclosure relates to a method for use in a base station. The method comprises configuring a user equipment (UE) with a medium access control (MAC) entity comprising a primary discontinuous reception (DRX) group and a secondary DRX group, and transmitting downlink control information (DCI) on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group.

[0073] Various embodiments can preferably implement the following features:

[0074] Preferably, the DCI is a first DCI transmitted outside an active time of at least one of the primary DRX group or the secondary DRX group, wherein the first DCI comprises a wake-up indication.

[0075] Preferably, transmitting the DCI on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group comprises transmitting the DCI on a physical downlink control channel monitoring occasion,

[0076] transmitting the first DCI on a first cell of the primary DRX group, or

[0077] transmitting the first DCI on a second cell of the secondary DRX group, or

[0078] transmitting the first DCI on a first cell of the primary DRX group and transmitting the first DCI on a second cell of the secondary DRX group.

[0079] Preferably, the first DCI comprises at least one of a predefined information, a higher layer signaling or C bits, where C≥1, for indicating whether at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow a wake-up indication of the first DCI.

[0080] Preferably, the higher layer signaling comprises at least one of a radio resource control parameter or a MAC control entity.

[0081] Preferably, the wake-up indication comprises M bits, where M≥1, indicating whether to start a timer associated with a DRX on-duration for the primary DRX group and the secondary DRX group.

[0082] Preferably, the wake-up indication comprises N=N1+N2 bits, where N≥1, N1 is a number of bits indicating whether to start a timer associated with a DRX on-duration for the primary DRX group, and N2 is a number of bits indicating whether to start a timer associated with a DRX on-duration for the secondary DRX group.

[0083] Preferably, the DCI is a second DCI comprising a sleep indication, where the second DCI is transmitted outside an active time of at least one of the primary DRX group or the secondary DRX group, and the sleep indication indicates a sleep behavior of at least one serving cell in the at least one of the primary DRX group or the secondary DRX group.

[0084] Preferably, transmitting the DCI on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group comprises:

[0085] transmitting the second DCI on a first cell of the primary DRX group, or

[0086] transmitting the second DCI on a second cell of the secondary DRX group, or

[0087] transmitting the second DCI on a first cell of the primary DRX group and transmitting the second DCI on a second cell of the secondary DRX group.

[0088] Preferably, the DCI is a third DCI comprising a sleep indication, where the third DCI is transmitted within an active time of at least one of the primary DRX group or the secondary DRX group, and the sleep indication indicates a sleep behavior of at least one serving cell in the at least one of the primary DRX group or the secondary DRX group.

[0089] Preferably, transmitting the DCI on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group comprises:

[0090] transmitting the third DCI on a first cell of the primary DRX group, or

[0091] transmitting the third DCI on a second cell of the secondary DRX group, or

[0092] transmitting the third DCI on a first cell of the primary DRX group and transmitting a third cell of the secondary DRX group.

[0093] Preferably, the third DCI comprises N bits indicating whether the sleep indication is enabled for at least one secondary cell in the primary DRX group and at least one secondary cell in the secondary DRX group, where N > 1.

[0094] Preferably, the sleep indication transmitted in one of the primary DRX group and the secondary DRX group indicates a sleep behavior of at least one serving cell in the DRX group receiving the sleep indication.

[0095] Preferably, the sleep indication transmitted in one of the primary DRX group and the secondary DRX group indicates a sleep behavior of at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group.

[0096] Preferably, the DCI is a fourth DCI transmitted outside of an active time of at least one of the primary DRX group or the secondary DRX group, wherein the fourth DCI comprises a wake-up indication and a sleep indication.

[0097] Preferably, transmitting the DCI on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group comprises: a physical downlink control channel monitoring occasion before a next DRX cycle,

[0098] transmitting the fourth DCI on a first cell of the primary DRX group, or

[0099] transmitting the fourth DCI on a second cell of the secondary DRX group, or

[0100] transmitting the fourth DCI on a first cell of the primary DRX group and transmitting the fourth DCI on a second cell of the secondary DRX group.

[0101] Preferably, the fourth DCI indicates whether to start a timer associated with a DRX on-duration and a sleep behavior related operation in one of the primary DRX group and the secondary DRX group.

[0102] Preferably, the fourth DCI indicates the UE to start or not to start a timer associated with a DRX on-duration and a sleep behavior related operation in the primary DRX group and the secondary DRX group.

[0103] Preferably, the sleep indication is applied to at least one serving cell of the secondary DRX group based on at least one of a predefined information, a higher layer signaling or N bits in the fourth DCI, where N ≥ 1.

[0104] Preferably, the higher layer signaling comprises at least one of a radio resource control parameter or a MAC control entity.

[0105] Preferably, the DCI comprises at least one of a first indication indicating a search space set group switch or a second indication indicating a physical downlink control channel (PDCCH) skipping.

[0106] The present disclosure relates to a user equipment, wherein a medium access control (MAC) entity of the user equipment comprises a primary discontinuous reception (DRX) group and a secondary DRX group, the user equipment comprising a processor configured to monitor a control channel for receiving a downlink control information (DCI) in at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

[0107] Various embodiments can preferably implement the following features:

[0108] Preferably, the processor is further configured to perform any of the above methods.

[0109] The present disclosure relates to a base station comprising:

[0110] a processor configured to configure a medium access control (MAC) entity of a user equipment (UE) comprising a primary discontinuous reception (DRX) group and a secondary DRX group, and

[0111] a communication unit configured to transmit a downlink control information (DCI) on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group.

[0112] Various embodiments can preferably implement the following features:

[0113] Preferably, the processor is further configured to perform any of the above methods.

[0114] The present disclosure relates to a computer program product comprising a computer readable program medium code stored thereon, which code, when executed by a processor, causes the processor to implement a signal processing method as recited in any preceding method. BRIEF DESCRIPTION OF DRAWINGS

[0115] The exemplary embodiments disclosed herein are intended to provide features that will become apparent to those of ordinary skill in the art upon review of the following description in conjunction with the accompanying drawings. In accordance with various embodiments, exemplary systems, methods, apparatus and computer program products are disclosed herein. It should be understood, however, that these embodiments are presented by way of example and not limitation, and that the disclosed embodiments can be modified in various ways while still falling within the scope of the present disclosure.

[0116] Accordingly, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. In addition, the particular order or hierarchy of steps in methods disclosed herein are merely exemplary. Based upon design preferences, the particular order or hierarchy of steps in the methods disclosed can be re-arranged while still falling within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present disclosure is not limited to the specific order or hierarchy presented unless expressly stated otherwise.

[0117] The above and other aspects and implementations thereof are described in more detail in the accompanying drawings, description and claims.

[0118] Figure 1 An example of a schematic diagram of a wireless terminal in an embodiment of the present disclosure is shown.

[0119] Figure 2 An example of a schematic diagram of a wireless network node in an embodiment of the present disclosure is shown.

[0120] Figure 3 A flowchart of a process according to an embodiment of the present disclosure is shown.

[0121] Figure 4 A flowchart of a process according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0122] Figure 1A schematic diagram of a wireless terminal 10 involved in embodiments of the present disclosure. The wireless terminal 10 can be a user equipment (UE), a mobile phone, a laptop computer, a tablet computer, an e-book, or a portable computer system, and is not limited thereto. The wireless terminal 10 can include a processor 100 such as a microprocessor or an application specific integrated circuit (ASIC), a storage unit 110, and a communication unit 120. The storage unit 110 can be any data storage device that stores program codes 112 accessed and executed by the processor 100. Embodiments of the storage unit 110 include, but are not limited to, a subscriber identity module (SIM), a read only memory (ROM), a flash memory, a random access memory (RAM), a hard disk, and an optical data storage device. The communication unit 120 can be a transceiver and is used to transmit and receive signals (e.g., messages or data packets) according to the processing result of the processor 100. In one embodiment, the communication unit 120 transmits and receives signals via at least one antenna 122 shown. Figure 2 The communication unit 120 transmits and receives signals via the at least one antenna 122 shown.

[0123] In one embodiment, the storage unit 110 and the program codes 112 can be omitted, and the processor 100 can include a storage unit having stored program codes.

[0124] The processor 100 can implement any of the steps in the exemplary embodiments on the wireless terminal 10, for example, by executing the program codes 112.

[0125] The communication unit 120 can be a transceiver. Alternatively or additionally, the communication unit 120 can combine a transmission unit and a reception unit configured to respectively transmit and receive signals to and from a wireless network node (e.g., a base station).

[0126] Figure 2A diagram related to a wireless network node 20 in embodiments of the present disclosure. The wireless network node 20 can be a satellite, a base station (BS), a network entity, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN), a next generation RAN (NG-RAN), a data network, a core network controller, or a radio network controller (RNC), and the present disclosure is not limited thereto. In addition, the wireless network node 20 can include (execute) at least one network function, such as an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), an application function (AF), etc. The wireless network node 20 can include a processor 200 such as a microprocessor or an ASIC, a storage unit 210, and a communication unit 220. The storage unit 210 can be any data storage device that stores program codes 212 accessed and executed by the processor 200. Examples of the storage unit 210 include, but are not limited to, a SIM, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. The communication unit 220 can be a transceiver and is used to transmit and receive signals (e.g., messages or packets) according to the processing result of the processor 200. In one example, the communication unit 220 transmits and receives signals via at least one antenna 222 shown. Figure 3 The communication unit 220 transmits and receives signals via the at least one antenna 222 shown.

[0127] In one embodiment, the storage unit 210 and the program codes 212 can be omitted. The processor 200 can include a storage unit having stored program codes.

[0128] The processor 200 can implement any steps described in the exemplary embodiments on the wireless network node 20, for example, via execution of the program codes 212.

[0129] The communication unit 220 can be a transceiver. Alternatively or additionally, the communication unit 220 can combine a transmission unit and a reception unit configured to transmit and receive signals to and from a wireless terminal (e.g., a user equipment), respectively.

[0130] In one embodiment, the DRX state (DRX state) is equivalent to the DRX status (DRX status), and is used to indicate that the relevant serving cell(s) is in a DRX on duration or a DRX off duration.

[0131] Example 1

[0132] In some cases, the introduction of secondary discontinuous reception (DRX) group can cause the DRX state of serving cells in the same cell group (MCG or SCG) to be inconsistent. Therefore, when the secondary DRX group and wake-up indication are applied at the same time, incompatible or ambiguous operations can occur. To solve this problem, the present embodiment proposes to use the secondary DRX group function and the wake-up indication function at the same time.

[0133] In one embodiment, the UE is configured with DRX mode, and the serving cells of the UE are configured in two DRX groups by control (e.g. radio resource control (RRC)). The DRX group with SpCell can be referred to as the primary DRX group (legacy DRX group). The other DRX group can be referred to as the secondary DRX group. For example, for the master cell group (MCG), the DRX group containing the PCell is the primary DRX group (legacy DRX group), and the other group is referred to as the secondary DRX group. For the secondary cell group (SCG), the DRX group containing the PSCell can be the primary DRX group (legacy DRX group), and the other group is referred to as the secondary DRX group. The two DRX groups are configured with their own set of parameters (e.g. DRX-onDurationTimer (a parameter indicating the "on time" / active time when a DRX cycle starts; DRX-InactivityTimer (a parameter indicating how long the UE should remain "on" / active after receiving a physical downlink control channel indicating a new uplink (UL) or downlink (DL) transmission for the medium access control (MAC) entity) by the control (e.g. RRC), and share other DRX-related parameter values.

[0134] In one embodiment, multiple search space sets are configured to monitor corresponding channels, e.g. physical downlink control channel (PDCCH), in order to detect downlink control information (DCI) in the active DL bandwidth part (BWP). In one embodiment, the DCI is a first DCI, which is transmitted outside the active time, and has a wake-up indication. For example, the first DCI is DCI format 2_6, ignoring the sleep indication bit field. In one embodiment, the first DCI is transmitted only in the SpCell. In one embodiment, the first DCI is transmitted in multiple serving cells, such as SpCell and SCell.

[0135] In one embodiment, the wake-up signal (WUS) refers to the DCI with the wake-up indication bit field.

[0136] In one embodiment, the UE monitors the first DCI in the SpCell only when the UE is configured with the secondary DRX group. In one embodiment, there are M bits (M≥1) in the first DCI for indicating the UE to start or not to start the DRX-onDurationTimer, i.e., the wake-up indication bit field comprises M bits.

[0137] In one embodiment, the first DCI can be monitored in the SpCell when both DRX groups are outside the active time and this coincides with the corresponding PDCCH monitoring occasion before the next DRX cycle. In one embodiment, the DRX cycle refers to the long DRX cycle. The UE does not monitor the first DCI when one DRX group is outside the active time and the other DRX group is inside the active time. In one embodiment, the UE does not monitor the first DCI when one DRX group is in the long DRX cycle and the other DRX group is in the short DRX cycle. Upon detecting the first DCI, the serving cells in both DRX groups follow the wake-up indication bit field. In one embodiment, the serving cells in both DRX groups start the DRX-onDurationTimer in the next DRX cycle when the UE does not monitor the first DCI. In one embodiment, the wake-up indication bit field comprises 1 bit, and the ‘0’ value in the wake-up indication bit field is an indication of not starting the DRX-onDurationTimer in the next long DRX cycle, and the ‘1’ value indicates starting the DRX-onDurationTimer in the next long DRX cycle.

[0138] In one embodiment, the UE monitors the first DCI in the SpCell according to the DRX status of the serving cells in the primary DRX group. That is, at the PDCCH monitoring occasion before the next DRX cycle, the UE monitors the first DCI in the SpCell when the serving cells in the primary DRX group are outside the active time. In one embodiment, the DRX cycle refers to the long DRX cycle. For example, at the PDCCH monitoring occasion before the next DRX cycle, the UE monitors the first DCI if the serving cells in the primary DRX group are outside the active time (regardless of whether the serving cells in the secondary DRX group are outside or inside the active time). Otherwise, the UE does not monitor the first DCI. In one embodiment, the serving cells in both DRX groups start the DRX-onDurationTimer in the next DRX cycle when the UE does not monitor the first DCI. In one embodiment, the first DCI is enabled only in the long DRX cycle.

[0139] According to one embodiment, the serving cell in the primary DRX group follows the wake-up indication bit field in the first DCI. The serving cell in the primary DRX group starts or does not start the DRX-onDurationTimer according to the value of the wake-up indication bit field in the first DCI, and the serving cell in the secondary DRX group ignores the indication of the first DCI. In one embodiment, the serving cell in the secondary DRX group will start the DRX-onDurationTimer in the next DRX cycle. According to another embodiment, the serving cell in the secondary DRX group will not start the DRX-onDurationTimer in the next DRX cycle. According to another embodiment, the serving cell in the secondary DRX group starts or does not start the DRX-onDurationTimer in the next DRX cycle according to higher layer signaling (e.g., RRC parameter or MAC control element (CE)).

[0140] In the present disclosure, the higher layer signaling can be equivalent to a higher layer parameter or a higher layer message. In addition, the higher layer can be a network layer higher than the physical layer (e.g., the MAC layer or the RRC layer).

[0141] According to one embodiment, the serving cells in both DRX groups follow the wake-up indication bit field in the first DCI. The serving cells in both DRX groups start or do not start the DRX-onDurationTimer according to the value of the wake-up indication bit field.

[0142] According to one embodiment, when the DRX states of the two DRX groups are the same, the serving cells in the primary DRX group follow the wake-up indication bit field in the first DCI. In one embodiment, when the DRX states of the two DRX groups are the same, the serving cells in the two DRX groups start or do not start the DRX-onDurationTimer according to the value of the wake-up indication bit field in the first DCI. In one embodiment, the DRX states of the two DRX groups are the same, which means that the serving cells in the two DRX groups are both outside the active time, and the two DRX groups are both in a long DRX cycle. Otherwise, the serving cells in the primary DRX group follow the wake-up indication in the first DCI, while the serving cells in the secondary DRX group ignore the indication in the first DCI. In one embodiment, when the secondary DRX group ignores the wake-up indication, the serving cells in the secondary DRX group start the DRX-onDurationTimer in the next DRX cycle. In one embodiment, when the secondary DRX group ignores the wake-up indication, the serving cells in the secondary DRX group do not start the DRX-onDurationTimer in the next DRX cycle. In one embodiment, when the secondary DRX group ignores the wake-up indication, the serving cells in the secondary DRX group start or do not start the DRX-onDurationTimer in the next DRX cycle according to higher layer signaling (e.g., RRC parameter or MAC CE).

[0143] According to one embodiment, the serving cells in the primary DRX group follow the wake-up indication in the first DCI. Whether the serving cells in the secondary DRX group ignore the wake-up indication in the first DCI is determined by higher layer signaling (e.g., RRC parameter or MAC CE).

[0144] According to one embodiment, the serving cells in the primary DRX group follow the wake-up indication in the first DCI. Whether the serving cells in the secondary DRX group ignore the wake-up indication in the first DCI is indicated by one bit in the first DCI in addition to the wake-up indication of the first DCI. For example, when the bit is “0”, the secondary DRX group ignores the first DCI; when the bit is “1”, the secondary DRX group follows the indication in the first DCI. That is, when the bit is “1”, whether the secondary DRX group starts the DRX-onDurationTimer depends on the wake-up indication.

[0145] According to one embodiment, whether the serving cells in the primary DRX group and the secondary DRX group follow the wake-up indication in the first DCI is indicated by C bits (C≥1) in addition to the wake-up indication in the first DCI. For example, C equals 2. When the bits are “01”, the primary DRX group follows the wake-up indication in the first DCI, while the secondary DRX group ignores the wake-up indication; when the bits are “10”, the primary DRX group ignores the wake-up indication in the first DCI, while the secondary DRX group follows the wake-up indication; when the bits are “11”, both the primary DRX group and the secondary DRX group follow the wake-up indication in the first DCI. Wherein, following the wake-up indication means whether the DRX group starts the DRX-onDurationTimer depends on the wake-up indication.

[0146] The UE only monitors the first DCI in the SpCell, which has the benefit that the impact on the existing protocol is negligible, so that the behavior of the base station and the UE conforms to the existing or future standards. In addition, the present disclosure causes less signal transmission and reception, thereby reducing the overhead of the base station and the UE. In addition, the use of both the secondary DRX and the WUS technology can obtain greater power saving gain.

[0147] In one embodiment, there are N bits in the first DCI (hereinafter also referred to as enhanced WUS) for indicating whether the UE starts or does not start the DRX-onDurationTimer, i.e., the wake-up indication bit field includes N bits. In one embodiment, N=N1+N2 and N>1, N1 and N2 are integers, wherein N1 bits of the wake-up indication bit field indicate the operation of the primary DRX group, and N2 bits of the wake-up indication bit field indicate the operation of the secondary DRX group, which is to start or not to start the DRX-onDurationTimer, for example, N=2, N1=N2=1. In one embodiment, bit “0” represents that the DRX group does not start the DRX-onDurationTimer in the next long DRX cycle; bit “1” represents that the DRX group starts the DRX-onDurationTimer in the next long DRX cycle. For example, the wake-up indication bit field is “10”, then the serving cells in the primary DRX group start the DRX-onDurationTimer in the next DRX cycle, while the serving cells in the secondary DRX group do not start the DRX-onDurationTimer in the next DRX cycle. In one embodiment, the enhanced WUS is monitored in the SpCell only when both the DRX groups are outside the active time before the PDCCH monitoring occasion. In one embodiment, the UE monitors or does not monitor the enhanced WUS in the SpCell according to the DRX state of the serving cells in the primary DRX group. In one embodiment, the first DCI is enabled only in the long DRX cycle. In one embodiment, the first DCI is enabled for both the long DRX cycle and the short DRX cycle.

[0148] The present application can increase the operation flexibility of the UE without increasing the decoding complexity. Both DRX groups can be woken up or not woken up separately, which not only has no impact on the data scheduling service of the UE, but also causes the power saving effect of the UE.

[0149] In one embodiment, the UE monitors the first DCI in the two DRX groups separately. For the primary DRX group, the UE monitors the first DCI in the SpCell. For the secondary DRX group, the UE monitors the first DCI in a dedicated SCell (hereinafter referred to as secondary-primary cell). In one embodiment, the dedicated SCell is a predefined SCell. In one embodiment, the dedicated SCell is configured by higher layer signaling. In one embodiment, the dedicated SCell is an SCell used for scheduling the PCell / PSCell. In one embodiment, the UE monitors or does not monitor the first DCI according to the DRX state of the serving cell in the corresponding DRX group only. For example, when the primary DRX group is outside the active time and the secondary DRX is inside the active time, then the UE monitors the first DCI on the SpCell, but does not monitor the first DCI on the secondary-primary cell. For example, when the primary DRX group is inside the active time and the secondary DRX is outside the active time, then the UE monitors the first DCI on the secondary-primary cell, but does not monitor the first DCI on the SpCell. In one embodiment, the wake-up indication bit field is the same for the two DRX groups. In one embodiment, the WUS detected in the SpCell only indicates the operation of the primary DRX group, and the WUS detected in the secondary-primary cell only indicates the operation of the secondary DRX group. In one embodiment, the WUS detected in one DRX group can indicate the operation in both DRX groups. In one embodiment, the wake-up indication bit field can be different for the two DRX groups. In one embodiment, the WUS detected in one DRX group can only indicate the operation in the corresponding DRX group, wherein the operation is to start or not to start the DRX-onDurationTimer. For example, when the bit is "0", the secondary DRX group ignores the first DCI; when the bit is "1", the secondary DRX group follows the indication in the first DCI. In one embodiment, the UE monitors the first DCI in the two DRX groups separately. In one embodiment, the UE monitors or does not monitor the first DCI according to the DRX state of the serving cell in the corresponding DRX group only. In one embodiment, the N bits of the wake-up indication indicate the operation of the two DRX groups respectively. In one embodiment, the UE can monitor the first DCI on the two DRX groups. In one embodiment, the UE only monitors the first DCI in the SpCell when both the two DRX groups are outside the active time on the corresponding PDCCH monitoring occasion before the next DRX cycle.

[0150] The above embodiments can significantly reduce the possibility of WUS false detection and increase the flexibility of UE operation (i.e., wake up or not wake up) in the two DRX groups. Good power saving effect can also be obtained.

[0151] In one embodiment, if the UE is configured with search space sets for monitoring PDCCH in order to detect the first DCI in the active DL BWP and the UE does not detect the first DCI, the two DRX groups indicate whether the UE will start the DRX-onDurationTimer in the next DRX cycle by respective parameters ps-WakeupOrNot. Alternatively, if the UE has activated search space sets for monitoring PDCCH in order to detect the first DCI in the active DL BWP and the UE does not detect the first DCI, the two DRX groups are indicated by two parameters respectively. For example, a first parameter (e.g., ps-WakeupOrNot-PrimaryDRXGroup) indicates whether the serving cells in the primary DRX group start or not start the DRX-onDurationTimer in the next DRX cycle. And, a second parameter (e.g., ps-WakeupOrNot-SecondaryDRXGroup) indicates whether the serving cells in the secondary DRX group start or not start the DRX-onDurationTimer in the next DRX cycle.

[0152] Example 2

[0153] In some cases, the introduction of the secondary DRX group can cause the DRX states of the serving cells in the same cell group (MCG or SCG) to be inconsistent. Therefore, when the secondary DRX group and the SCell dormancy indication are applied at the same time, incompatible or ambiguous operations can occur. To solve this problem, the present embodiment provides a solution that enables the simultaneous use of the secondary DRX group function and the SCell dormancy indication.

[0154] In one embodiment, the UE has DRX mode enabled and the UE's serving cells are configured by control (e.g. RRC) in two DRX groups. In one embodiment, the DRX group with SpCell is referred to as the primary DRX group (legacy DRX group). According to the present embodiment, the other DRX group is referred to as the secondary DRX group. For example, for the master cell group (MCG), the DRX group containing the PCell is the primary DRX group (legacy DRX group), while the other group is referred to as the secondary DRX group. For the secondary cell group (SCG), the DRX group containing the PSCell is the primary DRX group (legacy DRX group), while the other group is referred to as the secondary DRX group. The two DRX groups are configured by the control (e.g. RRC) with their own set of parameters (e.g. DRX-onDurationTimer, DRX-InactivityTimer) and they share other DRX related parameter values.

[0155] In one embodiment, multiple search space sets are configured to monitor the corresponding channels (e.g. PDCCH) for detecting the DCI in the active DL BWP. Alternatively, the DCI is a second DCI, which is transmitted outside the active time and has a sleep indication. For example, the second DCI is DCI format 2_6 described in Rel-16 of 5G, which ignores the wake-up indication bit field. In one embodiment, the second DCI is transmitted only in the SpCell. In one embodiment, the second DCI is transmitted in multiple serving cells, such as the SpCell and SCell.

[0156] In one embodiment, when the UE is configured with the secondary DRX group, the UE monitors the second DCI only in the SpCell.

[0157] In one embodiment, the second DCI can be monitored in the SpCell when both DRX groups are outside the active time on the PDCCH monitoring occasion before the next DRX cycle. In one embodiment, the DRX cycle refers to the long DRX cycle. When one DRX group is outside the active time while the other is inside the active time, the second DCI is not monitored. In one embodiment, the UE monitors or does not monitor the second DCI on the SpCell according to the DRX state of the serving cell in the primary DRX group. That is, the UE monitors the second DCI on the SpCell when the serving cell in the primary DRX group is outside the active time on the corresponding PDCCH monitoring occasion before the next DRX cycle.

[0158] In one embodiment, the SCells of the UE are grouped according to the higher layer parameter (e.g., dormancyGroupOutsideActiveTime) regardless of the DRX state of the activated SCells being outside of the active time or inside of the active time when the second DCI is detected.

[0159] In one embodiment, the active BWP of the activated SCells in the two DRX groups is indicated by the dormancy indication (bitmap) of the second DCI. That is, the dormancy indication is enabled for both the primary DRX group and the secondary DRX group regardless of the DRX state of the two DRX groups being the same. In one embodiment, a ‘0’ value of one bit of the dormancy indication indicates that the active DL BWP is the dormant BWP for the activated SCells in the corresponding SCell group. In one embodiment, a ‘1’ value of one bit of the dormancy indication indicates that the active DL BWP is the non-dormant BWP for the activated SCells in the corresponding SCell group.

[0160] In one embodiment, only the activated SCells in the primary DRX group follow the dormancy indication (bitmap) of the second DCI regardless of the DRX state of the two DRX groups being the same. That is, when the dormancy indication is enabled for the primary DRX group and not enabled for the secondary DRX group, the activated SCells in the secondary DRX group ignore the dormancy indication regardless of the DRX state of the two DRX groups being the same. For example, the first bit of the dormancy indication is “0”, then the active DL BWP of the activated SCells belonging to both the first SCell group configured by the higher layer parameter and the primary DRX group is indicated as the dormant BWP. The activated SCells belonging to the first SCell group and the secondary DRX group ignore the dormancy indication.

[0161] In one embodiment, the activated SCells in the primary DRX group and the activated SCells in the secondary DRX group both follow the dormancy indication (bitmap) of the second DCI when the DRX state of the two DRX groups is the same. That is, the dormancy indication is enabled for both the primary DRX group and the secondary DRX group when the DRX state of the two DRX groups is the same. In one embodiment, only the activated SCells in the primary DRX group follow the dormancy indication (bitmap) of the second DCI when the DRX state of the two DRX groups is different. For example, when the activated SCells in the primary DRX group are outside of the active time and the activated SCells in the secondary DRX group are inside of the active time, the UE monitors the second DCI in the SpCell and the dormancy indication is enabled for the primary DRX group and not enabled for the secondary DRX group, the activated SCells in the secondary DRX group ignore the dormancy indication.

[0162] In one embodiment, the active SCells in the primary DRX group follow the dormancy indication (bitmap) of the second DCI. Whether the SCells of the secondary DRX group enable the dormancy indication depends on the indication information. For example, the active DL BWP of the SCells in the secondary DRX group is indicated as a dormancy BWP, and the SCells ignore the dormancy indication; the active DL BWP of the SCells in the secondary DRX group is indicated as a non-dormancy BWP, and the SCells follow the dormancy indication.

[0163] In one embodiment, whether the SCells in the primary DRX group and / or in the secondary DRX group ignore the dormancy indication in the second DCI is determined by higher layer signaling (e.g., RRC parameter or MAC CE).

[0164] In one embodiment, whether the SCells in the primary DRX group and / or in the secondary DRX group ignore the dormancy indication in the second DCI is indicated by N bits (N≥1) in addition to the dormancy indication in the second DCI. For example, N is equal to 1, the SCells in the primary DRX group follow the dormancy indication of the second DCI, and when the bit is “0”, the secondary DRX group ignores the second DCI; and when the bit is “1”, the secondary DRX group follows the indication in the second DCI. For example, N is equal to 2. And when the bit is “01”, the primary DRX group follows the dormancy indication in the second DCI, while the secondary DRX group ignores the dormancy indication in the second DCI; when the bit is “10”, the primary DRX group ignores the dormancy indication in the second DCI, while the secondary DRX group follows the dormancy indication in the second DCI; when the bit is “11”, the primary DRX group and the secondary DRX group both follow the dormancy indication in the second DCI. Wherein, following the dormancy indication refers to whether the UE performs dormancy BWP and non-dormancy BWP switching according to the value of the dormancy indication.

[0165] In one embodiment, the dormancy indication is enabled, and therefore, the active DL BWP of the corresponding active SCell is indicated by the dormancy indication.

[0166] According to the present disclosure, the UE only monitors the second DCI in the SpCell, and the advantage is that the impact on the existing protocol is negligible, so that the behavior of the base station and the UE conforms to the existing or future standards. In addition, the use of both secondary DRX and dormancy indication can improve the power saving gain.

[0167] In one embodiment, the UE monitors the second DCI in two DRX groups respectively. For the primary DRX group, the UE monitors the second DCI in the SpCell. For the secondary DRX group, the UE monitors the second DCI in a dedicated SCell (hereinafter referred to as secondary-primary cell). In one embodiment, the dedicated SCell is a predefined SCell. In one embodiment, the dedicated SCell is configured by higher layer signaling (such as RRC parameter or MAC CE). In one embodiment, the dedicated SCell is an SCell used for scheduling PCell / PSCell.

[0168] In one embodiment, when activating SCell follows the dormancy indication in the second DCI, i.e., the second DCI is enabled for activating SCell, the activating SCell is grouped according to the higher layer parameter dormancyGroupOutsideActiveTime regardless of whether the DRX state of the activating SCell is outside the active time or inside the active time.

[0169] In one embodiment, the UE monitors or does not monitor the second DCI only according to the DRX state of the serving cell in the corresponding DRX group. For example, the primary DRX group is outside the active time, and the secondary DRX is inside the active time, then the UE monitors the second DCI in the SpCell, but does not monitor the second DCI in the secondary-primary cell. For example, the primary DRX group is inside the active time, and the secondary DRX is outside the active time, then the UE monitors the second DCI in the dedicated SCell in the secondary DRX group, but does not monitor the second DCI in the SpCell of the primary DRX group. In one embodiment, the dormancy indication bit field is the same for the two DRX groups. In one embodiment, the dormancy indication (of the second DCI) detected in the SpCell only indicates the dormancy behavior of the primary DRX group, and the dormancy indication (of the second DCI) detected in the secondary-primary cell only indicates the dormancy behavior of the secondary DRX group. In one embodiment, the dormancy indication (of the second DCI) detected in one DRX group can indicate the dormancy behavior in both DRX groups. In one embodiment, the dormancy indication bit field can be different for the two DRX groups, and the bitmap size can also be different according to one embodiment. In one embodiment, the dormancy indication (of the second DCI) detected in one DRX group can only indicate the dormancy behavior of the SCell in its corresponding DRX group.

[0170] The advantageous effect of the above embodiment is that the above ambiguity of UE behavior is solved since the UE is configured with both the secondary DRX group and the dormancy indication at the same time. In addition, the power saving gain can be improved without affecting the data reception function of the UE.

[0171] In one embodiment, the UE does not expect SCells in one SCell group to have two different DRX parameter configurations (regardless of whether the SCell group is outside or inside the active time). That is, one DRX group can contain multiple SCell groups, but one SCell group can only correspond to one DRX group. In one embodiment, the UE does not expect SCells in one SCell group to belong to two frequency ranges (regardless of whether the SCell group is outside or inside the active time).

[0172] In one embodiment, when SCells in a SCell group contain two different DRX parameter configurations, the sleep indication received by the current DRX group only works in SCells with the same DRX configuration as the current DRX group. Alternatively, when SCells in a SCell group correspond to two DRX groups, the sleep indication received by the current DRX group only works in SCells in the current DRX group.

[0173] In one embodiment, when a SCell corresponds to a '1' (enabled) value of the sleep indication in the second DCI, and the current active DL BWP is the sleep DL BWP, the active DL BWP indicated by the higher layer parameter (such as firstOutsideActiveTimeBWP-Id).

[0174] Example 3

[0175] In some cases, the introduction of the secondary DRX group can cause the DRX state of the serving cells in the same cell group (MCG or SCG) to be inconsistent. Therefore, when the secondary DRX group and the SCell sleep indication are applied at the same time, incompatible or ambiguous operations can occur. To solve this problem, the present embodiment simultaneously uses the secondary DRX group function and the SCell sleep indication, especially for the case where the DRX state of the SCell in the primary DRX group and the secondary DRX group is different.

[0176] In one embodiment, the UE is configured with DRX mode and the UE’s serving cells are configured by control (e.g. RRC) in two DRX groups. In one embodiment, the DRX group with SpCell is referred to as the primary DRX group (legacy DRX group). The other DRX group is referred to as the secondary DRX group. For example, for the master cell group (MCG), the DRX group containing the PCell is the primary DRX group (legacy DRX group), while the other group is referred to as the secondary DRX group. For the secondary cell group (SCG), the DRX group containing the PSCell is the primary DRX group (legacy DRX group), while the other group is referred to as the secondary DRX group. The two DRX groups are configured by the control (e.g. RRC) with its own set of parameters (e.g. DRX-onDurationTimer, DRX-InactivityTimer) and share other DRX related parameter values.

[0177] In one embodiment, multiple search space sets are configured to monitor corresponding channels (e.g. PDCCH) for detecting the DCI in the active DL BWP. Alternatively, the DCI is a third DCI, which is transmitted within the active time and has the dormancy indication. For example, the third DCI is DCI format 0_1 and / or DCI format 1_1 with SCell dormancy indication field described in 5G Rel-16. In one embodiment, the third DCI is transmitted only in the SpCell. In one embodiment, the second DCI is transmitted in multiple serving cells, such as the SpCell and the SCell.

[0178] In one embodiment, when the UE is configured with the secondary DRX group, the UE monitors the third DCI only in the SpCell.

[0179] In one embodiment, the dormancy indication within the active time refers to the third DCI.

[0180] In one embodiment, when both DRX groups are within the active time, the UE detects the in-active-time-dormancy indication in SpCell, the UE’s SCells are grouped according to the higher layer parameter, e.g., (Rel-16) dormancyGroupWithinActiveTime, and the active DL BWP in the corresponding active SCell in the primary DRX group and the secondary DRX group is indicated by the in-active-time-dormancy indication (bitmap). In one embodiment, when both DRX groups are within the active time, the UE detects the in-active-time-dormancy indication in SpCell, the UE’s SCells are grouped according to the higher layer parameter, e.g., dormancyGroupWithinActiveTime, and the active DL BWP in the corresponding active SCell in the primary DRX group is indicated by the in-active-time-dormancy indication (bitmap), while the SCells in the secondary DRX group ignore the in-active-time-dormancy indication (bitmap).

[0181] In one embodiment, when the UE detects the in-active-time-dormancy indication in SpCell within the active time, the following schemes can be selected.

[0182] In one embodiment, the UE’s active SCells are grouped according to the higher layer parameter, e.g., dormancyGroupWithinActiveTime. In one embodiment, the active SCells in both the primary DRX group and the secondary DRX group follow the in-active-time-dormancy indication. In one embodiment, the active SCells in both the primary DRX group and the secondary DRX group ignore the in-active-time-dormancy indication. In one embodiment, the active cells in the primary DRX group follow the in-active-time-dormancy indication, while the active cells in the secondary DRX group ignore the in-active-time-dormancy indication. In one embodiment, the active SCells in the primary DRX group follow the in-active-time-dormancy indication. Whether the SCells in the secondary DRX group follow the in-active-time-dormancy indication depends on the indication information. For example, the active DL BWP of the SCell in the secondary DRX group is indicated as a dormant BWP, and the SCell ignores the in-active-time-dormancy indication. The active DL BWP of the SCell in the secondary DRX group is indicated as a non-dormant BWP, and the SCell follows the in-active-time-dormancy indication.

[0183] In one embodiment, following the dormancy indication within active time means that the UE sets the active DL BWP to the indicated active DL BWP. For example, a '0' value of one bit of the bitmap (dormancy indication within active time) indicates the active DL BWP provided by dormant-BWP-Id (dormant-BWP-Id), and a '1' value of one bit of the bitmap indicates the active DL BWP provided by non-dormant-BWP (non-dormant-BWP), e.g., using the corresponding parameter, e.g., firstWithinActiveTimeBWP-Id (firstWithinActiveTimeBWP-Id) if the current active DL BWP is a dormant DL BWP, or using the current active DL BWP if the current active DL BWP is not a dormant DL BWP. In one embodiment, for an activated SCell in the secondary DRX group, a '1' (enabled) value of one bit of the bitmap indicates the active DL BWP, e.g., provided by the corresponding parameter (e.g., firstWithinActiveTimeBWP-Id) if the current active DL BWP is a dormant DL BWP.

[0184] In one embodiment, there are N bits (N≥1) in the third DCI for indicating whether to enable the dormancy indication within active time for the active SCells in the primary DRX group and / or the active SCells in the secondary DRX group. In one embodiment, the bit(s) are immediately after the bitmap (SCell dormancy indicator). In one embodiment, the bit(s) are before the SCell dormancy indicator (immediately before the bitmap dormancy indicator). In one embodiment, when N=1, bit 'cl' indicates that the activated SCells in the primary / secondary DRX group do not perform operation according to the dormancy indication, and bit 'c2' indicates that the activated SCells in the primary / secondary DRX group perform operation according to the dormancy indication. In one embodiment, 'cl' is 0 or 1, and 'c2' is 0 or 1. In one embodiment, when N=2, bit '01' indicates that the primary DRX group follows the dormancy indication in the third DCI while the secondary DRX group ignores the dormancy indication; bit '10' indicates that the primary DRX group ignores the dormancy indication in the third DCI while the secondary DRX group follows the dormancy indication; bit '11' indicates that both the primary DRX group and the secondary DRX group follow the dormancy indication in the third DCI. "Follows the dormancy indication" means whether the UE performs dormant BWP and non-dormant BWP switching according to the value of the dormancy indication.

[0185] In one embodiment, the UE can monitor the third DCI with dormancy indication in two DRX groups respectively. For the primary DRX group, the UE monitors the third DCI in the SpCell. For the secondary DRX group, the UE monitors the third DCI in a dedicated SCell (hereinafter referred to as secondary-primary cell). In one embodiment, the dedicated SCell is a predefined SCell. In one embodiment, the dedicated SCell is configured by higher layer signaling (such as RRC parameter or MAC CE). In one embodiment, the dedicated SCell is an SCell used for scheduling PCell / PSCell.

[0186] In one embodiment, the dormancy indication within the active time detected in the SpCell only indicates the dormancy behavior of the active SCell in the primary DRX group, and the dormancy indication within the active time detected in the secondary-primary cell only indicates the dormancy behavior of the active SCell in the secondary DRX group. In one embodiment, the dormancy indication within the active time detected in one DRX group can indicate the dormancy behavior in both DRX groups. In one embodiment, when the dormancy indication within the active time is enabled, the active SCell following the dormancy indication is grouped according to the parameter (e.g. dormancyGroupWithinActiveTime). In one embodiment, when the SCell in the primary DRX group is outside the active time but the SCell in the secondary DRX group is within the active time, the third DCI is monitored in the secondary-primary cell.

[0187] In one embodiment, when the secondary-primary cell receives the third DCI (e.g. DCI format 1_1) without scheduling information, the secondary-primary cell performs the corresponding operation according to the dormancy indication. When the secondary-primary cell receives the third DCI (e.g. DCI format 1_1) carrying scheduling information, the secondary-primary cell ignores the dormancy indication. In one embodiment, when the secondary-primary cell receives the third DCI (e.g. DCI format 1_1) carrying scheduling information, the secondary-primary cell performs the corresponding operation according to the dormancy indication. When the secondary-primary cell receives the third DCI (e.g. DCI format 1_1) without scheduling information, the secondary-primary cell ignores the dormancy indication. In one embodiment, the secondary-primary cell receives the dormancy indication, and then the active SCell performs the operation according to the indication regardless of whether the DCI schedules data.

[0188] In one embodiment, when the SCell corresponds to the '1' (enabled) value of the dormancy indication in the third DCI, and the current active DL BWP is the dormancy DL BWP, the active DL BWP is indicated by the corresponding parameter (e.g. firstWithinActiveTimeBWP-Id).

[0189] In one embodiment, the UE does not expect SCells in one SCell group to have two different DRX parameter configurations (regardless of whether the SCell group is outside or inside the active time). That is, one DRX group can contain multiple SCell groups, but one SCell group can only correspond to one DRX group. Alternatively, the UE does not expect SCells in one SCell group to belong to two frequency ranges (regardless of whether the SCell group is outside or inside the active time).

[0190] In one embodiment, when SCells in a SCell group contain two different DRX parameter configurations, the sleep indication received by the current DRX group only works in SCells with the same DRX configuration as the current DRX group. In one embodiment, when SCells in a SCell group correspond to two DRX groups, the sleep indication received by the current DRX group only works in SCells in the current DRX group.

[0191] Example 4

[0192] In some cases, the introduction of the secondary DRX group can cause the DRX state of the serving cells in the same cell group (MCG or SCG) to be inconsistent. Therefore, when the secondary DRX group and the wake-up signal and / or the secondary DRX group and the SCell sleep indication are applied at the same time, incompatible or ambiguous operations can occur. To solve this problem, the present embodiment simultaneously uses the secondary DRX group function, the wake-up signal and the SCell sleep indication.

[0193] In one embodiment, the UE is configured with DRX mode and the UE's serving cells are configured in two DRX groups by control (e.g. RRC). In one embodiment, the DRX group with SpCell is referred to as the primary DRX group (legacy DRX group). The other DRX group is referred to as the secondary DRX group. For example, for the master cell group (MCG), the DRX group containing the PCell is the primary DRX group (legacy DRX group), and the other group is referred to as the secondary DRX group. For the secondary cell group (SCG), the DRX group containing the PSCell is the primary DRX group (legacy DRX group), and the other group is referred to as the secondary DRX group. The two DRX groups are configured with their own parameter sets (e.g. DRX-onDurationTimer, DRX-InactivityTimer) by the said control (e.g. RRC), and share other DRX-related parameter values.

[0194] In one embodiment, multiple search space sets are configured to monitor corresponding channels (e.g., PDCCH) for detecting the DCI in the active DL BWP. In one embodiment, the DCI is a fourth DCI, which is transmitted outside the active time and has a wake-up indication and a SCell dormancy indication. For example, the fourth DCI is DCI format 2_6 described in Rel-16 of 5G. In one embodiment, the fourth DCI is transmitted only in the SpCell. In one embodiment, the fourth DCI is transmitted in multiple serving cells, such as the SpCell and the SCell. In one embodiment, when both the wake-up indication and the dormancy indication are enabled, the UE operation can be a free combination of the above cases.

[0195] In one embodiment, when the UE is configured with the secondary DRX group, it monitors the fourth DCI only in the SpCell.

[0196] In one embodiment, the fourth DCI can be monitored in the SpCell when both DRX groups are outside the active time at the PDCCH monitoring occasion before the next DRX cycle. In one embodiment, the DRX cycle refers to the long DRX cycle. When one DRX group is outside the active time and the other is inside the active time, the fourth DCI is not monitored. In one embodiment, when one DRX group is in the long DRX cycle and the other DRX group is in the short DRX cycle, the fourth DCI is not monitored. In one embodiment, when the fourth DCI is detected, the UE’s SCells are grouped according to the higher layer parameter (e.g., dormancyGroupOutsideActiveTime) regardless of whether the DRX state of the activated SCell is outside the active time or inside the active time. In one embodiment, when the fourth DCI is detected, the serving cells in both DRX groups start or not start the DRX-onDurationTimer according to the value of the wake-up indication bit field and the activated BWP of the activated SCell in both DRX groups indicated by the dormancy indication (bitmap). Otherwise, the UE will not monitor the fourth DCI and the serving cells in both DRX groups will start the DRX-onDurationTimer in the next DRX cycle.

[0197] In one embodiment, the UE monitors or does not monitor the fourth DCI in the SpCell according to the DRX state of the serving cell in the primary DRX group. That is, the UE monitors the fourth DCI on the SpCell when the serving cell in the secondary DRX group is outside the active time at the corresponding PDCCH monitoring occasion before the next DRX cycle. In one embodiment, the DRX cycle refers to the long DRX cycle. For example, the UE monitors the fourth DCI if the serving cell in the primary DRX group is outside the active time (regardless of whether the serving cell in the secondary DRX group is outside or inside the active time) at the PDCCH monitoring occasion before the next DRX cycle. Otherwise, the UE does not monitor the fourth DCI. In one embodiment, when the UE does not monitor the fourth DCI, the serving cells in both DRX groups will start the DRX-onDurationTimer in the next DRX cycle.

[0198] In one embodiment, the fourth DCI is enabled for both the primary DRX group and the secondary DRX group regardless of whether the DRX states of the two DRX groups are the same. That is, the serving cells in both DRX groups start or do not start the DRX-onDurationTimer according to the value of the wake-up indication bit field and the active DL BWP of the activated SCell in both DRX groups indicated by the sleep indication (bitmap).

[0199] In one embodiment, the fourth DCI is enabled for the primary DRX group but not for the secondary DRX group, and the wake-up indication and the sleep indication are ignored by the activated SCell in the secondary DRX group regardless of whether the DRX states of the two DRX groups are the same. In one embodiment, the serving cell in the secondary DRX group will start the DRX-onDurationTimer in the next DRX cycle. In one embodiment, the serving cell in the secondary DRX group will not start the DRX-onDurationTimer in the next DRX cycle. In one embodiment, the serving cell in the secondary DRX group starts or does not start the DRX-onDurationTimer in the next DRX cycle according to the higher layer signaling (e.g., RRC parameter or MAC CE). In one embodiment, when the DRX is indicated to not start the DRX-onDurationTimer, the UE is not expected to be indicated to switch BWP.

[0200] In one embodiment, when the DRX states of the two DRX groups are the same, both the active SCell in the primary DRX group and the active SCell in the secondary DRX group follow the indication in the fourth DCI. In one embodiment, when the DRX states of the two DRX groups are different, only the active SCell in the primary DRX group follows the indication in the fourth DCI. That is, when the DRX states of the two DRX groups are the same, the fourth DCI is enabled for both the primary DRX group and the secondary DRX group. For example, when the active SCell in the primary DRX group is outside of the on-duration time and the active SCell in the secondary DRX group is inside of the on-duration time, the UE monitors the fourth DCI in the SpCell, and when the fourth DCI is enabled for the primary DRX group but not for the secondary DRX group, the active SCell in the secondary DRX group ignores the indication.

[0201] (Example 4) In one embodiment, the wake-up indication is enabled for both DRX groups, the sleep indication is enabled for the primary DRX group, and whether the sleep indication is enabled for the secondary DRX group depends on the indication information. For example, the active DL BWP of an SCell in the secondary DRX group is indicated as a sleep BWP, the SCell ignores the sleep indication; the active DL BWP of an SCell in the secondary DRX group is indicated as a non-sleep BWP, the SCell follows the sleep indication.

[0202] (Example 5) In one embodiment, the serving cells in the primary DRX group follow the indication in the fourth DCI. Whether the serving cells in the secondary DRX group ignore the indication in the fourth DCI is determined by higher layer signaling (e.g., RRC parameter or MAC CE).

[0203] (Example 6) In one embodiment, the serving cells in the primary DRX group follow the indication in the fourth DCI. Whether the serving cells in the secondary DRX group ignore the indication in the fourth DCI is indicated by one bit in the fourth DCI. For example, when the bit is “0”, the secondary DRX group ignores the fourth DCI; when the bit is “1”, the secondary DRX group follows the indication in the fourth DCI.

[0204] In one embodiment, when the wake-up indication indicates not to start the DRX-onDurationTimer, the sleep indication is ignored.

[0205] In one embodiment, the UE does not expect SCells in one SCell group (whether the SCell group is outside of the active time or within the active time) to have two different DRX parameter configurations. That is, one DRX group can contain multiple SCell groups, but one SCell group can only correspond to one DRX group. Alternatively, the UE does not expect SCells in one SCell group (whether the SCell group is outside of the active time or within the active time) to belong to two frequency ranges.

[0206] In one embodiment, when SCells in a SCell group contain two different DRX parameter configurations, the sleep indication received by the current DRX group only works in SCells with the same DRX configuration as the current DRX group. Alternatively, when SCells in a SCell group correspond to two DRX groups, the sleep indication received by the current DRX group only works in SCells in the current DRX group.

[0207] In one embodiment, when the SCell corresponds to the '1' value of the sleep indication in the fourth DCI, and the current active DL BWP is the sleep DL BWP, then the active DL BWP provided by the first-non-dormant-BWP-ID-for-DCI-outside-active-time is indicated.

[0208] Embodiment 5:

[0209] In some cases, the introduction of the secondary DRX group can cause the DRX state of the serving cells in the same cell group (MCG or SCG) to be inconsistent. Therefore, when the secondary DRX group and the search space set group switching indication or the PDCCH skipping indication are applied at the same time, incompatible or ambiguous operations can occur. To solve this problem, the present disclosure provides embodiments of simultaneously using the secondary DRX group function and the search space set group switching indication and / or the PDCCH skipping indication.

[0210] In one embodiment, the DCI includes at least one of the search space set group switching indication or the PDCCH skipping indication.

[0211] In one embodiment, a search space set group switch indication is used to indicate to the UE a search space set group switch for one or more cell groups. For example, operations related to search space set group switch can include that when the UE receives a search space set group switch indication, the UE monitors PDCCH according to the indicated search space set group after a duration, and stops monitoring the currently applied PDCCH according to the currently applied search space set group if the currently applied search space set group is different from the indicated search space set group.

[0212] In one embodiment, a PDCCH skip indication is used to indicate to the UE a PDCCH skip for one or more cell groups. For example, operations related to PDCCH skip can include that when the UE receives a PDCCH skip indication, the UE can stop monitoring PDCCH for a first duration. In one embodiment, the start time for the UE to stop monitoring PDCCH is a number of symbols or slots after the DCI containing the PDCCH skip indication.

[0213] In one embodiment, the UE receives a DCI including a search space set group switch indication and / or a PDCCH skip indication in a DRX group (e.g., a primary DRX group or a secondary DRX group). The serving cell in the DRX group configured with the search space set group switch and / or PDCCH skip indication (i.e., the DRX group includes the serving cell that receives the DCI) follows the search space set group switch indication and / or PDCCH skip indication. Alternatively or additionally, the serving cell in another DRX group ignores the search space set group switch indication and / or PDCCH skip indication. In some embodiments, “configured with search space set group switch or PDCCH skip” means supporting search space set group switch or PDCCH skip. In some embodiments, “configured with search space set group switch or PDCCH skip” means being able to do search space set group switch or PDCCH skip. “Follows the indication” means “does search space set group switch or PDCCH skip according to the indication”.

[0214] In one embodiment, a UE receives DCI including a search space set group switch indication and / or a PDCCH skipping indication in a DRX group (e.g., a primary DRX group or a secondary DRX group). In this embodiment, the UE receives the DCI in slot n, where n is an integer. In one embodiment, if a serving cell is associated with DCI-based search space set group switching and / or PDCCH skipping, and the serving cell is within an active time at the time the UE receives the DCI, the serving cell follows the search space set group switch indication and / or the PDCCH skipping indication. Alternatively or additionally, if a serving cell is associated with DCI-based search space set group switching and / or PDCCH skipping, and the serving cell is outside an active time at the time the UE receives the DCI, the serving cell ignores the search space set group switch indication and / or the PDCCH skipping indication.

[0215] In one embodiment, a UE receives DCI including a search space set group switch indication and / or a PDCCH skipping indication in a DRX group (e.g., a primary DRX group or a secondary DRX group). In this embodiment, the UE receives the DCI in slot n, where n is an integer. If a serving cell is associated with DCI-based search space set group switching and / or PDCCH skipping, the serving cell follows the search space set group switch indication and / or the PDCCH skipping indication.

[0216] In one embodiment, if a serving cell is associated with DCI-based search space set group switching, and the serving cell is within an active time at the time the UE receives the DCI, the UE monitors PDCCH in the serving cell according to the indicated search space set group after a first duration, and stops monitoring a currently applied (e.g., monitored) PDCCH according to the currently applied search space set group if the currently applied search space set group is different from the indicated search space set group. In some embodiments, if a serving cell is associated with DCI-based search space set group switching, and the serving cell is outside an active time at the time the UE receives the DCI, the UE monitors PDCCH in the serving cell according to the indicated search space set group after a second duration, and stops monitoring a currently applied PDCCH according to the currently applied search space set group if the currently applied search space set group is different from the indicated search space set group. In one embodiment, the first duration is the same as the second duration. In one embodiment, the first duration is different from the second duration. In one embodiment, the first duration is less than the second duration.

[0217] In some embodiments, if the serving cell is associated with DCI-based PDCCH skipping and the serving cell is within an active time at the time the UE receives the DCI, the UE stops monitoring PDCCH in the serving cell for a duration after a first number of symbols or slots after receiving the DCI. Alternatively or additionally, if the serving cell is associated with DCI-based PDCCH skipping and the serving cell is outside an active time at the time the UE receives the DCI, the UE stops monitoring PDCCH in the serving cell for a duration after a second number of symbols or slots after receiving the DCI. In one embodiment, the first number is the same as the second number. In one embodiment, the first number is different from the second number. In one embodiment, the first number is less than the second number.

[0218] Figure 3 A flowchart illustrating a process in an embodiment of the disclosure is shown. Figure 3 The process shown in FIG. 3 can be used in a wireless terminal (e.g., a UE) and includes the following steps:

[0219] Step 300: monitoring a control channel for receiving a DCI in at least one serving cell in at least one of a primary DRX group or a secondary DRX group.

[0220] More specifically, the wireless terminal is configured (e.g., by a BS) with a medium access control (MAC) entity including a primary DRX group and a secondary DRX group. In this embodiment, the wireless terminal monitors a control channel (e.g., a physical downlink control channel) for receiving a DCI in at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

[0221] In this disclosure, the at least one serving cell can represent “one serving cell” (e.g., including a primary cell) or “multiple serving cells” (e.g., a set of cells including special cell(s) and all secondary cells).

[0222] In one embodiment, the DCI is a first DCI received outside an active time of at least one of the primary DRX group or the secondary DRX group, where the first DCI includes a wake-up indication (e.g., embodiment 1). In this embodiment, the first DCI can be a WUS.

[0223] In one embodiment, at a physical downlink control channel monitoring occasion before a next DRX cycle, the wireless terminal receives the first DCI on only a first cell of the primary DRX group.

[0224] In one embodiment, at a physical downlink control channel monitoring occasion before a next DRX cycle, the wireless terminal receives the first DCI on a second cell of the secondary DRX group.

[0225] In one embodiment, the wireless terminal receives the first DCI on a first cell of the primary DRX group and on a second cell of the secondary DRX group at a physical downlink control channel monitoring occasion prior to a next DRX cycle.

[0226] In one embodiment, the first cell of the primary DRX group is a SpCell of the primary DRX group.

[0227] In one embodiment, the second cell of the secondary DRX group is a dedicated serving cell of the secondary DRX group.

[0228] In one embodiment, at least one serving cell in the primary DRX group (e.g., all serving cells in the primary DRX group) follows the wake-up indication in the first DCI.

[0229] In one embodiment, at least one serving cell in the secondary DRX group (e.g., all serving cells in the secondary DRX group) follows the wake-up indication in the first DCI.

[0230] In one embodiment, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group (e.g., all serving cells in the primary DRX group and the secondary DRX group) follow the wake-up indication in the first DCI.

[0231] In one embodiment, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the wake-up indication of the first DCI based on at least one of a predefined information, higher layer signaling, or C bits in the first DCI (where C is an integer greater than 1). For example, based on at least one of a predefined information, higher layer signaling, or C bits in the first DCI, the UE determines whether at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the wake-up indication of the first DCI. For example, the higher layer signaling includes at least one of an RRC parameter or a MAC control entity.

[0232] In one embodiment, the wake-up indication includes M bits (where M is an integer greater than 1) indicating whether to start the timers associated with DRX on durations (e.g., drx-onDurationTimer) for the primary DRX group and the secondary DRX group.

[0233] In one embodiment, the wake-up indication comprises N = N1 + N2 bits (where N > 1). In this embodiment, N1 is the number of bits indicating whether to start the timer associated with DRX on-duration for the primary DRX group, and N2 is the number of bits indicating whether to start the timer associated with DRX on-duration for the secondary DRX group.

[0234] In one embodiment, the wireless terminal monitors a control channel for receiving the first DCI at a physical downlink control channel monitoring occasion prior to a next DRX cycle. In one embodiment, the wireless terminal does not detect the first DCI. In such a case, one parameter can be predefined to indicate whether to start the timer associated with DRX on-duration for both the primary DRX group and the secondary DRX group in the next DRX cycle. Alternatively, two parameters are predefined to indicate whether to start the timer associated with DRX on-duration for the primary DRX group and the secondary DRX group, respectively, in the next DRX cycle.

[0235] In one embodiment, the DCI is a second DCI comprising a sleep indication. In this embodiment, the second DCI is received outside of an active time of at least one of the primary DRX group or the secondary DRX group, and the sleep indication indicates a sleep behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group (e.g., embodiment 2).

[0236] In one embodiment, the wireless terminal receives the second DCI on a first cell of the primary DRX group only.

[0237] In one embodiment, the wireless terminal receives the second DCI on a second cell of the secondary DRX group.

[0238] In one embodiment, the wireless terminal receives the second DCI on a first cell of the primary DRX group and on a second cell of the secondary DRX group.

[0239] Note that, according to embodiments of the present disclosure, the first cell of the primary DRX group is the SpCell of the primary DRX group, and the second cell of the secondary DRX group is a dedicated serving cell of the secondary DRX group.

[0240] In one embodiment, at least one serving cell in the primary DRX group follows the sleep indication in the second DCI.

[0241] In one embodiment, at least one serving cell in the secondary DRX group follows the sleep indication in the second DCI.

[0242] In one embodiment, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the dormancy indication in the second DCI.

[0243] In one embodiment, at least one serving cell in the secondary DRX group follows the dormancy indication of the second DCI based on higher layer signaling or N bits (where N > 1) in the second DCI. That is, the UE determines whether the at least one serving cell in the secondary DRX group follows the dormancy indication of the second DCI based on higher layer signaling or N bits in the second DCI. For example, the higher layer signaling includes at least one of an RRC parameter or a MAC CE.

[0244] In one embodiment, the wireless terminal monitors a control channel for the second DCI based on the DRX state of the primary DRX group. That is, the wireless terminal monitors or does not monitor a control channel for receiving the second DCI based on the DRX state of the primary DRX group.

[0245] In one embodiment, the wireless terminal monitors a control channel for the second DCI based on the DRX state of the secondary DRX group. That is, the wireless terminal monitors or does not monitor a control channel for receiving the second DCI based on the DRX state of the secondary DRX group.

[0246] In one embodiment, the wireless terminal monitors a control channel for the second DCI based on the DRX state of the primary DRX group and the secondary DRX group.

[0247] In one embodiment, the DCI is a third DCI including a dormancy indication. In this embodiment, the third DCI is received within an active time of at least one of the primary DRX group or the secondary DRX group, and the dormancy indication indicates a dormancy behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group (e.g., embodiment 3).

[0248] In one embodiment, the wireless terminal receives the third DCI on only a first cell of the primary DRX group.

[0249] In one embodiment, the wireless terminal receives the third DCI on a second cell of the secondary DRX group.

[0250] In one embodiment, the wireless terminal receives the third DCI on both a first cell of the primary DRX group and a second cell of the secondary DRX group.

[0251] Note that according to embodiments of the present disclosure, the first cell of the primary DRX group is a SpCell of the primary DRX group, and the second cell of the secondary DRX group is a dedicated serving cell of the secondary DRX group.

[0252] In one embodiment, the wireless terminal monitors the control channel for receiving the three DCIs within an active time of the primary DRX group. In this embodiment, either the primary DRX group is within the active time, or both the primary DRX group and the secondary DRX group are within the active time.

[0253] In one embodiment, at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the sleep indication of the third DCI.

[0254] In one embodiment, at least one serving cell in one of the primary DRX group and the secondary DRX group follow the sleep indication of the third DCI.

[0255] In one embodiment, the third DCI includes N bits (where N > 1) indicating whether the sleep indication is enabled for at least one serving cell in the primary DRX group (e.g., all secondary cells in the primary DRX group) and at least one serving cell in the secondary DRX group (e.g., all secondary cells in the secondary DRX group).

[0256] In one embodiment, the sleep indication received in one of the primary DRX group and the secondary DRX group indicates the sleep behavior of at least one serving cell in the DRX group that receives the sleep indication.

[0257] In one embodiment, the sleep indication received in one of the primary DRX group and the secondary DRX group indicates the sleep behavior of at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group.

[0258] In one embodiment, the third DCI is received on the second cell (e.g., dedicated serving cell) of the secondary DRX group. In this embodiment, at least one secondary cell follows the sleep indication when the third DCI includes scheduling information. Alternatively, the at least one secondary cell follows the sleep indication when the third DCI does not include the scheduling information. Alternatively, the at least one secondary cell follows the sleep indication regardless of whether the third DCI includes the scheduling information.

[0259] In one embodiment, the DCI is a fourth DCI received outside of an active time of at least one of the primary DRX group or the secondary DRX group. In this embodiment, the fourth DCI includes a wake-up indication and a sleep indication (e.g. embodiment 4).

[0260] In one embodiment, the wireless terminal receives the fourth DCI on the first cell of the primary DRX group at a physical downlink control channel monitoring occasion prior to a next DRX cycle.

[0261] In one embodiment, the wireless terminal receives the fourth DCI on the second cell of the secondary DRX group at a physical downlink control channel monitoring occasion prior to a next DRX cycle.

[0262] In one embodiment, the wireless terminal receives the fourth DCI on the first cell of the primary DRX group and the fourth DCI on the second cell of the secondary DRX group at a physical downlink control channel monitoring occasion prior to a next DRX cycle.

[0263] Note that, according to embodiments of the present disclosure, the first cell of the primary DRX group is a SpCell of the primary DRX group, and the second cell of the secondary DRX group is a dedicated serving cell of the secondary DRX group.

[0264] In one embodiment, the fourth DCI indicates the wireless terminal to start or not to start a timer associated with a DRX on-duration and a sleep behavior related operation in one of the primary DRX group and the secondary DRX group. Alternatively or additionally, the fourth DCI indicates the wireless terminal to start or not to start a timer associated with a DRX on-duration and a sleep behavior related operation in the primary DRX group and the secondary DRX group.

[0265] In one embodiment, the wireless terminal monitors a control channel for receiving the fourth DCI on the first cell of the primary DRX group based on a DRX state of the primary DRX group.

[0266] In one embodiment, the wireless terminal monitors a control channel for receiving the fourth DCI prior to a next long DRX cycle outside of an active time of one of the primary DRX group and the secondary DRX group.

[0267] In one embodiment, the wireless terminal does not monitor a control channel for receiving the fourth DCI prior to a next long DRX cycle outside of an active time of the primary DRX group.

[0268] In one embodiment, the wireless terminal starts a timer associated with a DRX on-duration in the next DRX cycle when the control channel for receiving the fourth DCI is not monitored before the next long DRX cycle.

[0269] In one embodiment, at least one (activated) secondary cell in the primary DRX group and at least one secondary cell in the secondary DRX group follow at least one of the wake-up indication or the sleep indication in the fourth DCI.

[0270] In one embodiment, at least one (activated) secondary cell in the primary DRX group follows at least one of the wake-up indication or the sleep indication of the fourth DCI.

[0271] In one embodiment, at least one (activated) secondary cell in the secondary DRX group follows at least one of the wake-up indication or the sleep indication of the fourth DCI.

[0272] In one embodiment, at least one of a predefined information, a higher layer signaling or N bits (where N > 1) in the fourth DCI is used to apply the sleep indication of the fourth DCI to at least one serving cell of the secondary DRX group.

[0273] In one embodiment, the higher layer signaling comprises at least one of an RRC parameter or a MAC CE.

[0274] In one embodiment, the wireless terminal receives the DCI in one of the primary DRX group and the secondary DRX group. In this embodiment, the DCI comprises at least one of a first indication indicating a search space set group switch or a second indication indicating a PDCCH skipping.

[0275] In one embodiment, at least one serving cell in one of the primary DRX group and the secondary DRX group receiving the DCI follows at least one of the first indication or the second indication. Alternatively or additionally, at least one serving cell in the other of the primary DRX group (not receiving the DCI) ignores at least one of the first indication or the second indication.

[0276] In one embodiment, when the DCI is received within an active time of at least one of the primary DRX group or the secondary DRX group, the method comprises tracking at least one of the first indication or the second indication. Alternatively or additionally, the DCI is received outside an active time of at least one of the primary DRX group or the secondary DRX group and the method further comprises ignoring at least one of the first indication or the second indication.

[0277] Figure 4 A flowchart illustrating a process in embodiments of the disclosure is shown. Figure 4 The illustrated process can be used in a wireless network node (e.g., a BS) and includes the following steps:

[0278] Step 400: configuring a MAC entity including a primary DRX group and a secondary DRX group to a UE.

[0279] Step 401: transmitting a DCI on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group.

[0280] In Figure 4 In the illustrated process, the BS configures a MAC entity including a primary DRX group and a secondary DRX group to the UE, and transmits the DCI on a control channel in at least one serving cell in at least one of the primary DRX group and the secondary DRX group.

[0281] In one embodiment, the DCI is a first DCI transmitted outside of an active time of at least one of the primary DRX group or the secondary DRX group, wherein the first DCI includes a wake-up indication.

[0282] In one embodiment, the BS transmits the first DCI on a first cell of the primary DRX group at a physical downlink control channel monitoring occasion before a next DRX cycle.

[0283] In one embodiment, the BS transmits the first DCI on a second cell of the secondary DRX group at a physical downlink control channel monitoring occasion before a next DRX cycle.

[0284] In one embodiment, the BS transmits the first DCI on a first cell of the primary DRX group and transmits the first DCI on a second cell of the secondary DRX group at a physical downlink control channel monitoring occasion before a next DRX cycle.

[0285] Note that the first cell can be a SpCell in the primary DRX group and the second cell can be a dedicated serving cell of the secondary DRX group.

[0286] In one embodiment, the first DCI includes at least one of a pre-defined information, a higher layer signaling or C bits (where C≥1) for indicating whether at least one serving cell in the primary DRX group (e.g., all serving cells in the primary DRX group) and at least one serving cell in the secondary DRX group (e.g., all serving cells in the secondary DRX group) follow the wake-up indication of the first DCI. For example, the higher layer signaling includes at least one of a radio resource control parameter or a MAC CE.

[0287] In one embodiment, the wake-up indication includes M bits (where M≥1) indicating whether to start a timer for the primary DRX group and the secondary DRX group to be associated with a DRX on-duration.

[0288] In one embodiment, the wake-up indication includes N=N1+N2 bits (where N≥1). In this embodiment, N1 is the number of bits indicating whether to start a timer for the primary DRX group to be associated with a DRX on-duration, and N2 is the number of bits indicating whether to start a timer for the secondary DRX group to be associated with a DRX on-duration.

[0289] In one embodiment, the DCI is a second DCI including a sleep indication. In this embodiment, the second DCI is transmitted outside of an active time of at least one of the primary DRX group or the secondary DRX group, and the sleep indication indicates a sleep behavior of at least one serving cell in the at least one of the primary DRX group or the secondary DRX group.

[0290] In one embodiment, the BS transmits the second DCI on a first cell of the primary DRX group.

[0291] In one embodiment, the BS transmits the second DCI on a second cell of the secondary DRX group.

[0292] In one embodiment, the BS transmits the second DCI on a first cell of the primary DRX group and transmits the second DCI on a second cell of the secondary DRX group.

[0293] Note that the first cell can be a SpCell in the primary DRX group, and the second cell can be a dedicated serving cell of the secondary DRX group.

[0294] In one embodiment, the DCI is a third DCI including a sleep indication. In this embodiment, the third DCI is transmitted within an active time of at least one of the primary DRX group or the secondary DRX group, and the sleep indication indicates a sleep behavior of at least one serving cell in the at least one of the primary DRX group or the secondary DRX group.

[0295] In one embodiment, the BS transmits the third DCI on a first cell of the primary DRX group.

[0296] In one embodiment, the BS transmits the third DCI on a second cell of the secondary DRX group.

[0297] In one embodiment, the BS transmits the third DCI on a first cell of the primary DRX group and on a second cell of the secondary DRX group.

[0298] Note that the first cell can be a SpCell in the primary DRX group and the second cell can be a dedicated serving cell of the secondary DRX group.

[0299] In one embodiment, the third DCI includes N bits (where N≥1) indicating whether the sleep indication is enabled for at least one secondary cell in the primary DRX group and at least one secondary cell in the secondary DRX group.

[0300] In one embodiment, the sleep indication transmitted in one of the primary DRX group and the secondary DRX group indicates a sleep behavior of at least one serving cell in the DRX group that receives the sleep indication.

[0301] In one embodiment, the sleep indication transmitted in one of the primary DRX group and the secondary DRX group indicates a sleep behavior of at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group.

[0302] In one embodiment, the DCI is a fourth DCI transmitted outside of an active time of at least one of the primary DRX group or the secondary DRX group. In this embodiment, the fourth DCI includes a wake-up indication and a sleep indication.

[0303] In one embodiment, the BS transmits the fourth DCI on a first cell of the primary DRX group.

[0304] In one embodiment, the BS transmits the fourth DCI on a second cell of the secondary DRX group.

[0305] In one embodiment, the BS transmits the fourth DCI on a first cell of the primary DRX group and on a second cell of the secondary DRX group.

[0306] Note that the first cell can be a SpCell in the primary DRX group and the second cell can be a dedicated serving cell of the secondary DRX group.

[0307] In one embodiment, the fourth DCI indicates whether to start a timer associated with a DRX on-duration and a sleep behavior related operation in one of the primary DRX group and the secondary DRX group.

[0308] In one embodiment, the fourth DCI indicates the UE to start or not to start a timer associated with a DRX on-duration and a sleep behavior related operation in the primary DRX group and the secondary DRX group.

[0309] In one embodiment, the sleep indication is applied to at least one serving cell of the secondary DRX group based on at least one of a pre-defined information, a higher layer signaling or N bits (where N > 1) in the fourth DCI. For example, the higher layer signaling includes at least one of a RRC parameter or a MAC CE.

[0310] In one embodiment, at least one of a first indication indicating a search space set group switch or a second indication indicating a PDCCH skipping.

[0311] While various embodiments of the present disclosure have been described above, it should be understood that they have been presented by way of example only, and not in limitation. As such, the various diagrams can depict example architectures or configurations for the devices, systems, or methods described herein, which can be employed in any number of variations. Similarly, although a particular feature of the disclosure can have been disclosed with respect to only one of multiple implementations, other implementations can include the particular feature. It should also be understood that one or more features of an embodiment of the disclosure can be combined with one or more features of another embodiment.

[0312] It should also be understood that any reference to an element in the singular has no intention to limit the implementation to a single element, unless the context clearly indicates otherwise. Rather, a singular reference to an element means one or more elements. It should also be understood that any reference to a method comprising steps means that the method can include the listed steps in any order, unless the context clearly indicates otherwise. Furthermore, any "example" or "exemplary" does not mean that the described feature is desirable over other features. In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure can be practiced without these specific details. In other instances, well-known methods, structures and techniques have not been described in detail in order to avoid obscuring the understanding of this description.

[0313] In addition, those skilled in the art will appreciate that any of a wide variety of different technological means can be employed to convey information and signals. For example, data, instructions, commands, information, signals, bits, and symbols, which can be referenced throughout the above description, can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0314] Those skilled in the art will further appreciate that any of the various illustrative logical blocks, units, processors, devices, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a number of logic

[0315] For clarity, the various illustrative logical blocks, units, processors, devices, circuits, and steps are described herein generally in terms of their functionality, although it should be appreciated that such functionality can be implemented in various ways and that the description of any functionality described herein is intended to encompass any such varied ways of implementing the described functionality. Such functionality can be implemented in hardware, firmware, software, or any combination thereof such as a processor that is programmed to perform specified functions, an application-specific or general use integrated circuit, a programmable logic device, or various combinations thereof. It should be noted that the functionality described herein as being performed by one or more elements can be performed instead by one or more other elements. For example, if processor A performs function(s) X, Y, and Z, processor B can perform functions X and Y, and processor C can perform function Z.

[0316] Furthermore, those skilled in the art will appreciate that the various illustrative logical blocks, units, devices, components, and circuits described herein can be implemented within or performed by an integrated circuit (IC), which can include a general purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, or a combination of these or any other suitable components. The logical blocks, units, and circuits can also include antennas and / or transceivers to communicate with various components within a network or within a device. The general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. The processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0317] Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program or code from one place to another. Storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Computer-readable media also can be any transitory signals

[0318] In this application, the term "unit" as used herein refers to software, firmware, hardware, and any combination of these elements that is used to perform the associated functions described herein. In addition, various elements of the application can be described as discrete units; however, these elements can be combined, as would be understood by one of ordinary skill in the art, in accordance with embodiments of the disclosure.

[0319] In addition, memory or other storage devices and communication components can be used in embodiments of the disclosure. It will be appreciated that, for clarity, the above description has described embodiments of the disclosure with reference to different functional units and processors. However, it will be apparent that any appropriate distribution of functionality between different functional units, processing logic elements or domains can be used without detracting from the disclosure. For example, functionality illustrated to be performed by separate processing logic elements or controllers can be performed by the same processing logic element or controller. Hence, references to specific functional units are only to be seen as references to suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

[0320] Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the implementations presented, but is to be accorded the widest scope consistent with the novelty in the following claims and the principles and features disclosed herein.

Claims

1. A method used in a user equipment (UE), wherein, The UE's Media Access Control (MAC) entity includes a primary discontinuous reception (DRX) group and a secondary DRX group, and the method includes: In at least one serving cell of at least one of the primary DRX group or the secondary DRX group, a control channel for receiving downlink control information (DCI) is monitored. Wherein, the DCI is a first DCI received outside the active time of at least one of the primary DRX group or the secondary DRX group, wherein the first DCI includes a wake-up indication; The wake-up indication includes N = N1 + N2 bits, where N ≥ 1, N1 is the number of bits indicating whether to start the timer associated with the main DRX group and the DRX start duration, and N2 is the number of bits indicating whether to start the timer associated with the auxiliary DRX group and the DRX start duration.

2. The method according to claim 1, comprising: Physical downlink control channel monitoring timing before the next DRX cycle The first DCI is received on the first cell of the primary DRX group, or The first DCI is received on the second cell of the secondary DRX group, or The first DCI is received on the first cell of the primary DRX group and on the second cell of the secondary DRX group.

3. The method according to claim 1, wherein, At least one serving cell in the primary DRX group follows the wake-up instruction, or At least one serving cell in the secondary DRX group follows the wake-up instruction, or At least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the wake-up instruction.

4. The method according to claim 1, wherein, At least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the wake-up instruction of the first DCI based on at least one of predefined information, higher-layer signaling, or C bits in the first DCI, wherein C ≥ 1.

5. The method according to claim 4, wherein, The higher-level signaling includes at least one of radio resource control parameters or MAC control entities.

6. The method according to any one of claims 2 to 5, wherein, Monitoring the control channel for receiving DCI in at least one serving cell of at least one of the primary DRX group or the secondary DRX group includes: The physical downlink control channel monitoring timing prior to the next DRX cycle monitors the control channel used to receive the first DCI. The first DCI was not detected, and A predefined parameter indicates whether to start a timer associated with the DRX on duration for both the primary DRX group and the secondary DRX group in the next DRX cycle, or... Two parameters are predefined to indicate whether to start a timer associated with the DRX on duration for the primary DRX group and the secondary DRX group in the next DRX cycle.

7. The method according to claim 1, wherein, The DCI is a second DCI that includes a sleep indicator. Wherein, the second DCI is received outside the active time of at least one of the primary DRX group or the secondary DRX group, and The hibernation indication indicates the hibernation behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

8. The method of claim 7, further comprising: The second DCI is received on the first cell of the primary DRX group, or The second DCI is received on the second cell of the secondary DRX group, or The second DCI is received on the first cell of the primary DRX group and on the second cell of the secondary DRX group.

9. The method according to claim 7, wherein, At least one serving cell in the primary DRX group follows the sleep instruction, or At least one serving cell in the secondary DRX group follows the sleep instruction, or At least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the hibernation instruction.

10. The method according to claim 9, wherein, At least one serving cell in the secondary DRX group follows the sleep instruction of the second DCI based on higher-layer signaling or N bits in the second DCI, where N≥1.

11. The method according to claim 10, wherein, The higher-level signaling includes at least one of radio resource control parameters or MAC control entities.

12. The method according to any one of claims 7 to 11, wherein, Monitoring the control channel for receiving DCI in at least one serving cell of at least one of the primary DRX group or the secondary DRX group includes: The control channel for the second DCI is based on the DRX status monitoring of the main DRX group, or The control channel for the second DCI is based on the DRX status monitoring of the auxiliary DRX group, or DRX status monitoring based on the primary DRX group and the secondary DRX group is used for the control channel of the second DCI.

13. The method according to claim 1, wherein, The DCI is a third DCI that includes a sleep indicator. The third DCI is received during the active time of at least one of the primary DRX group or the secondary DRX group, and The hibernation indication indicates the hibernation behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

14. The method of claim 13, further comprising: The third DCI is received on the first cell of the primary DRX group, or The third DCI is received on the second cell of the secondary DRX group, or The third DCI is received on the first cell of the primary DRX group, and the third cell of the secondary DRX group is also received.

15. The method according to claim 13, wherein, Monitoring the control channel for receiving DCI in at least one serving cell of at least one of the primary DRX group or the secondary DRX group includes: The control channel for receiving the third DCI is monitored during the active time of the primary DRX group, wherein the primary DRX group is active during the active time, or both the primary DRX group and the secondary DRX group are active during the active time.

16. The method of claim 14, wherein, At least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the sleep instruction of the third DCI, or At least one serving cell in one of the primary DRX group and the secondary DRX group follows the sleep instruction of the third DCI.

17. The method according to any one of claims 13 to 16, wherein, The third DCI includes N bits indicating whether the sleep indication is enabled for at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group, where N≥1.

18. The method according to any one of claims 13 to 16, wherein, The sleep indication received in one of the primary DRX group and the secondary DRX group indicates the sleep behavior of at least one serving cell in the DRX group that received the sleep indication, or The sleep indication received in one of the primary DRX group and the secondary DRX group indicates the sleep behavior of at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group.

19. The method of claim 14, wherein, The third DCI is received on the second cell of the secondary DRX group, and Wherein, when the third DCI includes scheduling information, at least one secondary cell follows the sleep instruction, or Wherein, when the third DCI does not include the scheduling information, the at least one secondary cell follows the sleep instruction, or Regardless of whether the third DCI includes the scheduling information, the at least one secondary cell follows the hibernation instruction.

20. The method according to claim 1, wherein, The DCI is a fourth DCI received outside the active time of at least one of the primary DRX group or the secondary DRX group, wherein the fourth DCI includes a wake-up indication and a sleep indication.

21. The method of claim 20, comprising: Physical downlink control channel monitoring timing before the next DRX cycle The fourth DCI is received on the first cell of the primary DRX group, or The fourth DCI is received on the second cell of the secondary DRX group, or The fourth DCI is received on the first cell of the primary DRX group and on the second cell of the secondary DRX group.

22. The method according to claim 20, in, The fourth DCI indicates whether to initiate a timer associated with the DRX on-time duration and sleep behavior-related operations in one of the primary DRX group and the secondary DRX group, and / or The fourth DCI instructs the UE to start or not start timers associated with the DRX on-time duration and sleep behavior-related operations in the primary DRX group and the secondary DRX group.

23. The method according to claim 20, wherein, Monitoring the control channel for receiving the fourth DCI in at least one serving cell of at least one of the primary DRX group or the secondary DRX group includes: Based on the DRX status of the primary DRX group, the control channel for receiving the fourth DCI is monitored on the first cell of the primary DRX group.

24. The method of claim 20, further comprising: The control channel for receiving the fourth DCI is not monitored before the next DRX cycle within the active time of one of the primary DRX group and the secondary DRX group.

25. The method of claim 24, further comprising: If the control channel for receiving the fourth DCI is not monitored before the next DRX cycle, a timer associated with the DRX on-duration is started in the next DRX cycle.

26. The method of claim 20, wherein, At least one secondary cell in the primary DRX group and at least one secondary cell in the secondary DRX group follow at least one of the wake-up instruction or the sleep instruction, or At least one secondary cell in the primary DRX group follows at least one of the wake-up indication or sleep indication of the fourth DCI, or At least one secondary cell in the secondary DRX group follows at least one of the wake-up indication or sleep indication of the fourth DCI.

27. The method according to any one of claims 20 to 26, wherein, The sleep indication is applied to at least one serving cell of the secondary DRX group based on predefined information, higher-layer signaling, or at least one of the N bits in the fourth DCI, where N≥1.

28. The method according to claim 27, wherein, The higher-level signaling includes at least one of radio resource control parameters or MAC control entities.

29. The method of claim 1, further comprising: The DCI is received in one of the primary DRX group and the secondary DRX group, wherein the DCI includes at least one of a first indication indicating a search space set group switch or a second indication indicating a skip of the physical downlink control channel (PDCCH).

30. The method according to claim 29, wherein, At least one serving cell in one of the primary DRX group and the secondary DRX group receiving the DCI follows at least one of the first instruction or the second instruction.

31. The method according to claim 29, wherein, At least one serving cell in another of the primary DRX group that has not received the DCI ignores at least one of the first indication or the second indication.

32. The method according to claim 29, wherein, When the DCI is received during the active time of at least one of the primary DRX group or the secondary DRX group, the method includes tracking at least one of the first indication or the second indication.

33. The method according to any one of claims 29 to 32, wherein, The DCI is received outside the active time of at least one of the primary DRX group or the secondary DRX group, and the method further includes ignoring at least one of the first indication or the second indication.

34. A method used in a base station, comprising: Configure the user equipment (UE) with the Media Access Control (MAC) entities for the primary discontinuous reception (DRX) group and the secondary DRX group, and Downlink control information (DCI) is transmitted on the control channel in at least one serving cell of at least one of the primary DRX group and the secondary DRX group; Wherein, the DCI is a first DCI transmitted outside the active time of at least one of the primary DRX group or the secondary DRX group, wherein the first DCI includes a wake-up indication; The wake-up indication includes N = N1 + N2 bits, where N ≥ 1, N1 is the number of bits indicating whether to start the timer associated with the main DRX group and the DRX start duration, and N2 is the number of bits indicating whether to start the timer associated with the auxiliary DRX group and the DRX start duration.

35. The method according to claim 34, wherein, Transmitting DCI on the control channel in at least one serving cell of at least one of the primary DRX group and the secondary DRX group includes: physical downlink control channel monitoring timing before the next DRX cycle. The first DCI is transmitted on the first cell of the primary DRX group, or The first DCI is transmitted on the second cell of the secondary DRX group, or The first DCI is transmitted on the first cell of the primary DRX group, and the first DCI is also transmitted on the second cell of the secondary DRX group.

36. The method according to claim 34, wherein, The first DCI includes at least one of the following: predefined information, higher-layer signaling, or C bits, for indicating whether at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group follow the wake-up indication of the first DCI, wherein C ≥ 1.

37. The method of claim 36, wherein, The higher-level signaling includes at least one of radio resource control parameters or MAC control entities.

38. The method according to claim 34, wherein, The DCI is a second DCI that includes a sleep indicator. Wherein, the second DCI is transmitted outside the active time of at least one of the primary DRX group or the secondary DRX group, and The hibernation indication indicates the hibernation behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

39. The method according to claim 38, wherein, Transmitting DCI on the control channel in at least one serving cell of at least one of the primary DRX group and the secondary DRX group includes: The second DCI is transmitted on the first cell of the primary DRX group, or The second DCI is transmitted on the second cell of the secondary DRX group, or The second DCI is transmitted on the first cell of the primary DRX group and on the second cell of the secondary DRX group.

40. The method of claim 34, wherein, The DCI is a third DCI that includes a sleep indicator. The third DCI is transmitted during the active time of at least one of the primary DRX group or the secondary DRX group, and The hibernation indication indicates the hibernation behavior of at least one serving cell in at least one of the primary DRX group or the secondary DRX group.

41. The method according to claim 40, wherein, Transmitting DCI on the control channel in at least one serving cell of at least one of the primary DRX group and the secondary DRX group includes: The third DCI is transmitted on the first cell of the primary DRX group, or The third DCI is transmitted on the second cell of the secondary DRX group, or The third DCI is transmitted on the first cell of the primary DRX group, and the third cell of the secondary DRX group is also transmitted.

42. The method according to claim 40, wherein, The third DCI includes N bits indicating whether the sleep indicator is enabled for at least one secondary cell in the primary DRX group and at least one secondary cell in the secondary DRX group, where N≥1.

43. The method according to any one of claims 40 to 42, wherein, The sleep indication transmitted in one of the primary DRX group and the secondary DRX group indicates the sleep behavior of at least one serving cell in the DRX group that received the sleep indication, or The sleep indication transmitted in one of the primary DRX group and the secondary DRX group indicates the sleep behavior of at least one serving cell in the primary DRX group and at least one serving cell in the secondary DRX group.

44. The method of claim 34, wherein, The DCI is a fourth DCI transmitted outside the active time of at least one of the primary DRX group or the secondary DRX group, wherein the fourth DCI includes a wake-up indication and a sleep indication.

45. The method according to claim 44, wherein, Transmitting DCI on the control channel in at least one serving cell of at least one of the primary DRX group and the secondary DRX group includes: physical downlink control channel monitoring timing before the next DRX cycle. The fourth DCI is transmitted on the first cell of the primary DRX group, or The fourth DCI is transmitted on the second cell of the secondary DRX group, or The fourth DCI is transmitted on the first cell of the primary DRX group and on the second cell of the secondary DRX group.

46. ​​The method according to claim 44, in, The fourth DCI indicates whether to initiate a timer associated with the DRX on duration and sleep behavior-related operations in one of the primary DRX group and the secondary DRX group, or The fourth DCI instructs the UE to start or not start timers associated with the DRX on-time duration and sleep behavior-related operations in the primary DRX group and the secondary DRX group.

47. The method according to any one of claims 44 to 46, wherein, The sleep indication is applied to at least one serving cell of the secondary DRX group based on predefined information, higher-layer signaling, or at least one of the N bits in the fourth DCI, where N≥1.

48. The method according to claim 47, wherein, The higher-level signaling includes at least one of radio resource control parameters or MAC control entities.

49. The method of claim 34, wherein, The DCI includes at least one of a first indication indicating a switch to the search space set group or a second indication indicating a skip of the Physical Downlink Control Channel (PDCCH).

50. A user equipment, wherein, The Media Access Control (MAC) entity of the user equipment includes a primary discontinuous reception (DRX) group and a secondary DRX group. The user equipment includes a processor configured to monitor a control channel for receiving downlink control information (DCI) in at least one serving cell of at least one of the primary DRX group or the secondary DRX group. The DCI is a first DCI received outside the active time of at least one of the primary DRX group or the secondary DRX group. The first DCI includes a wake-up indication comprising N = N1 + N2 bits, where N ≥ 1, N1 is a number of bits indicating whether to start a timer associated with the DRX activation duration of the primary DRX group, and N2 is a number of bits indicating whether to start a timer associated with the DRX activation duration of the secondary DRX group.

51. The user equipment according to claim 50, wherein, The processor is configured to perform the method according to any one of claims 2 to 5, 7 to 11, 13 to 16, 19 to 26, and 28 to 32.

52. A base station, comprising: A processor configured to configure a Media Access Control (MAC) entity, including a primary discontinuous reception (DRX) group and a secondary DRX group, to a user equipment (UE). A communication unit configured to transmit downlink control information (DCI) on a control channel in at least one serving cell of at least one of the primary DRX group and the secondary DRX group; Wherein, the DCI is a first DCI received outside the active time of at least one of the primary DRX group or the secondary DRX group, wherein the first DCI includes a wake-up indication; The wake-up indication includes N = N1 + N2 bits, where N ≥ 1, N1 is the number of bits indicating whether to start the timer associated with the main DRX group and the DRX start duration, and N2 is the number of bits indicating whether to start the timer associated with the auxiliary DRX group and the DRX start duration.

53. The base station according to claim 52, wherein, The processor is configured to perform the method according to any one of claims 35 to 42, 44 to 46 and 48 to 49.

54. A computer program product comprising computer-readable program medium code stored thereon, the code causing the processor, when executed by a processor, to implement the wireless communication method according to any one of claims 1 to 49.

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