Managing paging frames for wireless communications

Abstract

Various aspects of the present disclosure relate to a user equipment (UE) for wireless communication including at least one memory and at least one processor coupled with the at least one memory and configured to cause the UE to determine at least one first slot for receiving a paging frame, wherein the at least one first slot at least partially overlaps with at least one active duration of a discontinuous reception (DRX) cycle associated with the UE and at least one active duration of a discontinuous transmission (DTX) cycle associated with a network entity, and receive, from the network entity, a paging message during at least one paging occasion (PO) of the paging frame, wherein the at least one PO occurs during the at least one active duration of the DRX cycle and the at least one active duration of the DTX cycle.

Description

MANAGING PAGING FRAMES FOR WIRELESS COMMUNICATIONSCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to U.S. Provisional Patent Application No. 63 / 561,228, filed on March 4, 2024, which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present disclosure relates to wireless communications, and more specifically to managing (e.g., adapting, updating, modifying, adjusting) paging frames for wireless communications.BACKGROUND

[0003] A wireless communications system may include one or multiple network communication devices, such as base stations, which may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE), or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers, or the like). Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G)).

[0004] Some wireless communications systems continue to experience challenges with energy management for UEs. For example, wireless communications consume a signification amount of energy for the UEs. Therefore, limiting the duration during which the UEs actively perform wireless communication (e.g., transmit, receive) control information or data may be important for reducing (e.g., minimizing) energy consumptionby the UEs. Often, there are instances where the wireless communication may be unnecessary, allowing for the scheduling of inactive durations for the UEs without compromising performance by the UEs. However, these inactive durations may result in unwanted latency increase for the wireless communications (e.g., transmissions, receptions).SUMMARY

[0005] An article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a,” “at least one,” “one or more,” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of’ or “one or more of’ or “one or both of’) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.” Further, as used herein, including in the claims, a “set” may include one or more elements.

[0006] Some implementations of the method and apparatuses described herein may further include determining at least one first slot for receiving a paging frame, wherein the at least one first slot at least partially overlaps with at least one active duration of a discontinuous reception (DRX) cycle associated with a UE and at least one active duration of a discontinuous transmission (DTX) cycle associated with a network entity, and receiving, from the network entity, a paging message during at least one paging occasion (PO) of the paging frame, wherein the at least one PO occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity.

[0007] In some implementations of the method and apparatuses described herein, a UE determines a set of POs of the paging frame, and selects the at least one PO of a the set ofPOs of the paging frame, wherein a first subset of POs of the set of POs is associated with a set of one or more frequencies and the at least one first slot, a second subset of POs of the set of POs is associated with the set of one or more frequencies and at least one second slot different than the at least one first slot, the at least one PO is associated with the first subset of POs or the second subset of POs, and the at least one PO is associated with at least one frequency of the set of one or more frequencies.

[0008] In some implementations of the method and apparatuses described herein, the UE selects at least one random access channel occasion (RO) based at least in part on a mapping between the at least one PO and the at least one RO, wherein the at least one RO is associated with the at least one frequency of the set of one or more frequencies, and transmits at least one first random access message during the at least one RO and on the at least one frequency of the set of one or more frequencies.

[0009] In some implementations of the method and apparatuses described herein, the UE determines a timing offset for the paging frame, and apply the timing offset to the paging frame, and the at least one PO of the paging frame occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity based at least in part on the timing offset for the paging frame. The UE may monitor for or receive at least one second random access message from the network entity responding to the first random access message during an active duration of the DTX cycle associated with the network entity.

[0010] In some implementations of the method and apparatuses described herein, the UE receives downlink control information (DCI) via a physical downlink control channel (PDCCH), and decodes the DCI using a radio network temporary identifier (RNTI) associated with a paging group including the UE. The decoded DCI may indicate at least one frequency sub-band and the at least one first slot for a transmission of the paging message. The RNTI associated with the paging group may be selected from a set of RNTIs reserved for paging groups.

[0011] In some implementations of the method and apparatuses described herein, the UE determines at least one active duration of the DRX cycle associated with the UE thatoverlaps with the at least one active duration of the DTX cycle associated with the network entity.BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 illustrates an example of a wireless communications system in accordance with aspects of the present disclosure.

[0013] Figure 2 illustrates an example of paging occasions within a paging frame in accordance with aspects of the present disclosure.

[0014] Figure 3 illustrates an example of cell DTX and UE DRX active and inactive time periods in accordance with aspects of the present disclosure.

[0015] Figure 4 illustrates an example of paging occasions multiplexed in the frequency domain in accordance with aspects of the present disclosure.

[0016] Figure 5 illustrates an example of frequency mapping between paging occasions and RACH occasions in accordance with aspects of the present disclosure.

[0017] Figure 6 illustrates an example of a UE in accordance with aspects of the present disclosure.

[0018] Figure 7 illustrates an example of a processor 700 in accordance with aspects of the present disclosure.

[0019] Figure 8 illustrates an example of a network equipment (NE) in accordance with aspects of the present disclosure.

[0020] Figure 9 illustrates a flowchart of a method performed by a UE in accordance with aspects of the present disclosure.

[0021] Figure 10 illustrates a flowchart of a method performed by a NE in accordance with aspects of the present disclosure.DETAILED DESCRIPTION

[0022] A wireless communication system, including one or more of a network communication device (e.g., a base station) or a user communication device (e.g., a UE) may support a lower power mode, which may include one or more of a discontinuous reception (DRX) mode or a discontinuous transmission (DTX) mode. For the user communication device, the lower power mode may correspond to a radio resource control (RRC) state. For example, the user communication device may be an idle state (e.g., an RRC idle state) or an inactive state (e.g., an RRC inactive state). The user communication device may switch from a connected state (e.g., an RRC connected state) to the RRC idle state or the RRC inactive state based at least in part on the DRX mode for power saving. For example, in the RRC idle state, the user communication device may refrain from transmitting or receiving control information or data.

[0023] In LIE networks, paging frames (PF) and paging occasions (PO) are used to optimize the paging procedure and reduce the impact on network resources. A paging frame is a radio frame in which the UE monitors the paging channel (PCH) for paging messages. The paging frame is specified in the System Information Block Type 2 (SIB2) and is typically set to a value that aligns with the radio frame boundary of the UE’s cell.

[0024] The paging cycle defines the interval between consecutive paging occasions, and it can range from 16 to 2560 radio frames, with the default value being 256 radio frames, corresponding to 5.12 seconds. The value of the paging cycle is chosen based on the trade-off between the paging latency and the paging overhead. A commonly used value for paging cycles is 128. It means 128 radio frames. (128 radio frames=1280 msec=1.28 seconds). In other words, a UE will wake up after every 1.28 seconds even in Idle Mode to see if there is paging information for the UE or not.

[0025] Paging Cycle DRX refers to the use of DRX in conjunction with the paging cycle to further reduce the UE's power consumption. With Paging Cycle DRX, the UE only needs to monitor the paging channel during specific DRX periods within each paging cycle, instead of monitoring the channel continuously throughout the cycle.

[0026] The Paging Cycle DRX mechanism is implemented by defining two parameters: the DRX cycle and the paging cycle. The DRX cycle is the time interval during which a UE's receiver is switched off, while the paging cycle is the time interval between successive paging occasions. The DRX cycle duration is typically shorter than the paging cycle, and it is expressed as a multiple of the subframe duration.During the Paging Cycle DRX operation, the UE turns off its receiver during the DRX period and wakes up briefly at the end of each DRX period to check if there is any paging message on the paging channel. If there is no paging message, the UE goes back to sleep and repeats the DRX cycle until the end of the current paging cycle. If there is a paging message, the UE will wake up fully and initiate a connection with the network to receive the message and respond as needed.

[0027] When the network energy saving configuration is activated in a cell such as idle mode cell DTX / DRX configuration, messages using a paging channel and a physical random access channel (PRACH) should be transmitted within the active time of the cell to be successfully received. Accordingly, legacy paging frame and paging occasions outside active DTX periods of the cell cannot be reliably used to transmit paging messages.

[0028] Previous DTX / DRX configurations only account for DTX / DRX cycles of UEs, and do not account for DTX / DRX configurations of a base station. When a base station is configured with DTX / DRX cycles, the timing of the active periods of the DTX cycles of a cell may not align with active periods of DRX cycles of UEs. As a result, POs transmitted during the active DTX periods of a base station in a power saving mode may not be received by UEs with misaligned DRX cycles. Accordingly, the UEs may remain in idle mode and fail to receive data buffered at a base station. In addition, since the amount of time available to a base station is limited by the DTX / DRX cycles, a base station may not have adequate resources with which to transmit pending POs within a paging cycle.

[0029] Embodiments of the present disclosure may align active DRX periods of UEs with active DTX periods of a cell so that POs transmitted by the base station are successfully received by associated UEs. Embodiments may increase the resources associated with active DTX periods of base stations so that more POs can be transmitted to UEs within the active periods compared to conventional systems. For example, in some embodiments, POs are multiplexed in the frequency domain so that multiple POs can be transmitted by a base station and received by a UE within a single time slot.

[0030] In addition or in the alternative, the time slots available for PO transmission and reception may be densely arranged in the time domain of a PF. For example, the time slots available for PO selection within a PF may be limited to a set of time slots within the paging frame, e.g. no more than six time slots. The limited set of time slots may be clustered at the start of a PF. For example, the set of time slots may be limited to slots 0 to 5, slots 0 to 6, or slots 0 to 7 of a PF.

[0031] A network can obtain several benefits from embodiments of the present disclosure. For example, the network can implement a power savings mode for base stations using DTX / DRX periods while successfully providing paging messages to UEs. In addition, resources may be allocated to fall within the active times of a cell so that more UEs within a cell can receive paging messages and associated data transmissions within the limited resources of a power savings mode of the base station. In some embodiments, the lookup tables used by the UEs include legacy information to minimize changes to UEs that may operate in legacy environments or environments in which power savings is not active at a base station.

[0032] Aspects of the present disclosure are described in the context of a wireless communications system.

[0033] Figure 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more NE 102, one or more UE 104, and a core network (CN) 106. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LIE- Advanced (LTE-A) network. In some otherimplementations, the wireless communications system 100 may be a NR network, such as a 5G network, a 5G- Advanced (5G-A) network, or a 5G ultrawideband (5G-UWB) network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G, for example, 6G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA), frequency division multiple access (FDMA), or code division multiple access (CDMA), etc.

[0034] The one or more NE 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the NE 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a network function, a network entity, a radio access network (RAN), a NodeB, an eNodeB (eNB), a next-generation NodeB (gNB), or other suitable terminology. An NE 102 and a UE 104 may communicate via a communication link, which may be a wireless or wired connection. For example, an NE 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.

[0035] An NE 102 may provide a geographic coverage area for which the NE 102 may support services for one or more UEs 104 within the geographic coverage area. For example, an NE 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc.) according to one or multiple radio access technologies. In some implementations, an NE 102 may be moveable, for example, a satellite associated with a non-terrestrial network (NTN). In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas may be associated with different NE 102.

[0036] The one or more UE 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, atransmitter device, a receiver device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (loT) device, an Internet-of-Everything (loE) device, or machine-type communication (MTC) device, among other examples.

[0037] A UE 104 may be able to support wireless communication directly with other UEs 104 over a communication link. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.

[0038] An NE 102 may support communications with the CN 106, or with another NE102, or both. For example, an NE 102 may interface with other NE 102 or the CN 106 through one or more backhaul links (e.g., SI, N2, N2, or network interface). In some implementations, the NE 102 may communicate with each other directly. In some other implementations, the NE 102 may communicate with each other or indirectly (e.g., via the CN 106. In some implementations, one or more NE 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC). An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs).

[0039] The CN 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The CN 106 may be an evolved packet core (EPC), or a 5G core (5GC), which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management functions (AMF)) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility,authentication, and bearer management (e.g., data bearers, signal bearers, etc.) for the one or more UEs 104 served by the one or more NE 102 associated with the CN 106.

[0040] The CN 106 may communicate with a packet data network over one or more backhaul links (e.g., via an SI, N2, N2, or another network interface). The packet data network may include an application server. In some implementations, one or more UEs 104 may communicate with the application server. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the CN 106 via an NE 102. The CN 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server using the established session (e.g., the established PDU session). The PDU session may be an example of a logical connection between the UE 104 and the CN 106 (e.g., one or more network functions of the CN 106).

[0041] In the wireless communications system 100, the NEs 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers)) to perform various operations (e.g., wireless communications). In some implementations, the NEs 102 and the UEs 104 may support different resource structures. For example, the NEs 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the NEs 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5 G and among other suitable radio access technologies, the NEs 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures). The NEs 102 and the UEs 104 may support various frame structures based on one or more numerologies.

[0042] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., / r=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., / r=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., / r=l) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., / r=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclicprefix. A fourth numerology (e.g., / r=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., / r=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.

[0043] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames). Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.

[0044] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., / r=0, jU=l, / r=2, jU=3, / r=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols). In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing), a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., / r=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.

[0045] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 maysupport one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz - 7.125 GHz), FR2 (24.25 GHz - 52.6 GHz), FR3 (7.125 GHz - 24.25 GHz), FR4 (52.6 GHz - 114.25 GHz), FR4a or FR4-1 (52.6 GHz - 71 GHz), and FR5 (114.25 GHz - 300 GHz). In some implementations, the NEs 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the NEs 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data). In some implementations, FR2 may be used by the NEs 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.

[0046] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies). For example, FR1 may be associated with a first numerology (e.g., / r=0), which includes 15 kHz subcarrier spacing; a second numerology (e.g., / r=l), which includes 30 kHz subcarrier spacing; and a third numerology (e.g., / r=2), which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies). For example, FR2 may be associated with a third numerology (e.g., / r=2), which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., / r=3), which includes 120 kHz subcarrier spacing.

[0047] Figure 2 illustrates an example of paging frames and paging occasions. A paging occasion is a specific subframe within a paging frame in which the network searches for an idle UE to deliver data to. Instead, the UE wakes up in a specific subframe, typically either subframe 0, 4, 5 or 9 within a radio frame. These specific subframes within a Paging Frame when UE wakes up are paging occasions (POs).

[0048] The paging occasion is determined by the combination of the paging cycle and the radio frame number (RFN) of the cell. The paging occasion is used to minimize the signaling overhead by limiting the number of subframes for which the network searches for idle UEs.

[0049] The paging cycle determines the interval between consecutive paging occasions. The RFN of the cell is a counter that increments with every radio frame, and it is used to determine the subframes that correspond to the paging occasion.

[0050] The device-specific times, at which the device switches on its receiver and checks for a paging message, are determined by paging frames and paging occasions. The PF is a radio frame which may contain one or more POs for a set of devices. The PO is the specific time instant where the network can transmit the paging message for a subset of devices corresponding to the same PF. In the example in Figure 2, the PF occurs in frame 47 and the POs occur in subframes 4 and 9.

[0051]

[0052] The paging frame may be calculated using the following formula:SFN mod T = (T / N) x (UE_ID mod N) in which SFN is a system frame number, T = DRX cycle length in radio frames, N = Min(T,nB), nB is total number of POs in one DRX cycle broadcast within SIB2 and can have values of {4T,2T,T,T / 2,T / 4,T / 8,T / 16,T / 32}. N can have values of {T,T / 2,T / 4,T / 8,T / 16,T / 32}, and UE_ID = TMSI mod 1024.

[0053] The formula to compute paging occasions may be extracted from a look-up table which is indexed using: Ns = Max (1, nB / T ) and i_s = Floor(UE_ID / N) mod Ns, where Ns is the number of POs in a PF and is indicates the sub=frame number (i.e., PO) in the PF, the value of which is pre-defined for each value of Ns. An example of FDD subframe patterns is:An example of TDD subframe patterns is:

[0054] Figure 3 illustrates an example of DTX cycles of a cell 300 and DRX cycles of UEs 104A, 104B and 104C in accordance with aspects of the present disclosure. The DRX cycles of the UEs are idle mode DRX (I DRX) cycles in which the UEs periodically activate to monitor for paging messages during the active times, and are inactive or idle for the periods between the active times.

[0055] Also shown in Figure 3 is a cell that is configured with DTX cycles. The active and inactive periods of a cell DTX cycle are shown. One or more cell associated with a network entity 102 may be configured with DTX and / or DRX cycles to save energy.

[0056] In embodiments of the present disclosure, when DTX cycles are activated at a cell, common broadcast channels such as paging channels, synchronization signal block (SSB) channels and physical random access (PRACH) channels may be aligned with active DRX times of UEs. For example, embodiments may configure a paging frame to occur during an active DTX period of a cell and an active DRX of a target UE. One or both of a UE and a base station may use new paging frame calculations from the calculations shown above to accommodate cell active period cycles and / or UE I DRX cycles so that paging messages are transmitted within an active DTX period of the cell which coincides with an active period of the UE. Accordingly, calculations associated with a paging message, e.g. calculations for a paging frame, may be adapted to accommodate a cell’s active periods in combination with the I DRX active periods of one or more UE such that the paging frame is transmitted within the active duration of the cell. In another implementation, the new paging frame calculation includes the active duration of the cell so that the paging frame is transmitted within the active duration of the cell.

[0057] In some embodiments, a cell active period may be configured as a multiple of a cell’s DTX / DRX active time, or configured so that an I DRX active period fully or partially overlaps with the UE’s I DRX cycle and / or the UE’s connected mode DRX cycle active time period. In one example, the value of UE ID for calculating a paging occasion may be:UE ID = ((TMSI mod 1024) mod cell on-duration)In another exemplary example, the value for UE ID may be:UE ID = (TMSI mod cell on-duration)The cell DTX / DRX active and non-active periods may be broadcasted in system information so that the UE calculates and adapts the paging frame calculation according to the cell active periods, e.g. by using one of the equations shown above.

[0058] Referring to Figure 3, the active period of the cell is aligned with or overlaps the active period of UE 104A. This situation may occur regardless of whether the periodicity and on-duration are the same or different across the cell and whether the starting time of the UE I-DRX on-duration is the same as the cell active period starting time. In such an embodiment, a base station may transmit a paging message in a paging frame or paging occasions within a paging frame while monitored by UEs within the overlapped active time periods of the cell and UE.

[0059] The active period of UE 104B in Figure 3 only partially overlaps with the active period of the cell. In an embodiment in which the active period of a UE is partially outside the active period of a cell, a paging frame may be transmitted by a base station within the time period in which the active period of the cell overlaps with the active period of the UE. When a network entity 102 determines that a paging frame is scheduled to be transmitted to a UE at a time when the UE is in an inactive period, the base station may not transmit paging occasions within the non-overlapping paging frame, e.g. the paging frame that occurs when the UE is inactive. In an embodiment, the base station may refrain from transmitting the paging message during active cell DTX periods which do not overlap with active DRX periods of the UE, and wait to transmit the paging message in the next paging occasion of a paging frame that overlaps with an active DRX period of the UE. In another implementation, UE may skip such paging frame and / or paging occasions that are not overlapped with the cell active time duration.

[0060] Figure 3 also shows a situation in which the active period of the UE does not align with the active period of a cell 302, as seen in the case of UE 104C in Figure 3. In an embodiment, a new second I-DRX cycle with active periods that overlap with active periods of the cell may be activated at UE 104C, and the paging frame location may be calculated using the new I-DRX cycle for the UE. In another implementation, the paging frame calculation is modified such that the paging frame is provided with a time offset shiftconsidering the active time period of the cell. An example of a paging frame calculation with such a time offset shift is:PF = (SFN + paging offset) mod T = (T / N) x (UE_ID mod N)

[0061] In some embodiments, paging occasions are condensed in the time domain. When both a UE and the cell are using DTX / DRX cycles, there are fewer opportunities to align communications between the UE and the cell compared to when only the UE is using DTX / DRX cycles. Condensing paging occasions in the time domain may increase opportunities to align paging occasions align with active DRX periods of the UE, especially when the serving cell is in a power savings mode. In some embodiments, when there is partial overlap, the network may transmit a dynamic paging occasion indication containing time-frequency resources or activate one of the paging occasions from the configured paging occasions outside the active time period of the I DRX cycle of a UE dynamically using a low power wake up signal transmission to the UE. The UE monitoring the low power wake up signal using the low power wake up radio may wake up the main radio to monitor such dynamic paging occasions. In some embodiments the low power wake up radio may monitor the paging occasions directly. In some embodiments, when an active period of the UE does not align with the active period of a cell, the network may transmit the secondary I DRX activation to the UE using low power wake up signaling. The UE, after receiving the signaling, may calculate the paging frame and paging occasions according to the secondary I DRX cycle.

[0062] One way in which embodiments may condense paging occasions in the time domain is to multiplex one or more paging occasion in the frequency domain. Figure 4 illustrates an example of paging occasions that are multiplexed in the frequency domain in accordance with aspects of the present disclosure. In some embodiments, one or more paging occasion within a time slot of a paging frame is transmitted by a base station in a different frequency within the same time slot. In the example of Figure 4, three paging occasions (PO1, PO2, PO3) are transmitted in the fourth time slot of paging frame 47 using different respective frequencies. Similarly, three paging occasions (PO4, PO5, PO6) are transmitted in the ninth time slot.

[0063] In various embodiments, the number of paging occasions transmitted in the same time slot may be different from the example of Figure 4. For example, two or four paging occasions may be transmitted within the same time slots of a paging frame. In addition, the time slots in which paging occasions are transmitted may be limited to a set of time slots that is less than the 10 time slots within a paging frame.

[0064] Paging occasion calculations may be modified to account for the paging resources assigned in the frequency domain. In some embodiments, a set of radio network temporary identifiers (RNTI) are reserved for paging. Accordingly, multiple RNTIs may be used for paging purposes. The set of RNTIs that are reserved for paging may be used to communicate paging DCI indicating each of the multiple Pos that are transmitted at different respective frequencies within a single time slot. For example, a plurality of paging DCI maybe configured such that each paging DCI, which are transmitted on a physical downlink control channel (PDCCH) is scrambled with one of the plurality of RNTIs reserved for paging, which may be group specific paging RNTIs. Each respective paging DCI may indicate time and frequency resources in a slot, e.g. in one or more sub-band, for a PO that is frequency multiplexed in a paging slot. In addition, UEs belonging to each paging group may be configured with each of the reserved paging RNTIs for monitoring the PDCCH for paging information.

[0065] In another implementation, a single paging DCI scrambled with one paging RNTI may indicate time frequency resources for plurality of POs that are frequency multiplexed in a paging slot. Each UE in a paging group may be assigned with one frequency multiplexed paging resource for receiving a paging message.

[0066] In some embodiments, a new lookup table may be provided which includes a paging frequency domain resource indicator within a paging slot in a paging frame. A legacy lookup table may be used to indicate the number of a time slot of a paging occasion in a paging frame, and a new lookup table may be implemented to indicate a number of frequency domain paging occasions with the paging slot, as shown in Figure 4. For example, a legacy table may be used to indicate that paging occasions are transmitted within slots 4 and 9 of the paging frame, and a second lookup table may be used to indicate the frequency resources of the paging occasions within each time slot.

[0067] When two or more time slots are used for multiple paging occasions in the frequency domain, the sequence of the paging occasions may be calculated based on frequency first and time second. This can be seen in Figure 4, in which paging occasions 1- 3 are in the first time slot, and paging occasions 4-6 are in the second time slot.

[0068] In some embodiments, there is frequency mapping between the paging occasion used by a UE and corresponding RACH occasions (RO) used by the UE. An example of frequency mapping between POs and ROs can be seen in Figure 5, in which PO1 is mapped to the same frequency as RO1, PO2 is mapped to the same frequency as RO2, and PO3 is mapped to the same frequency as RO3. In such an embodiment, the UE may select a RACH resource with the same frequency region in which it has received a paging occasion to respond to a paging message in the paging occasion. Such an embodiment would reduce potential RACH collisions and latency.

[0069] After transmitting data to a base station on the RACH, a UE may wait for a RACH response within a configured time duration window. When the cell is operating in a DTX / DRX mode, the ra-ResponseWindow may be started at the first PDCCH occasion configured with RA-RNTI (Random access RNTI) from the end of the Random Access Preamble transmission within the active time of the cell DTX / DRX. In such an embodiment, the ra-ResponseWindow may skip the non-active cell DTX / DRX periods and calculate the ra-ResponseWindow to be within the active period of the cell.

[0070] In addition or in the alternative to frequency multiplexing paging occasions within a time slot, paging frames may be adapted to fall within the active time of the cell. In an embodiment, paging frames are calculated to fall within the active DTX periods of a cell so that paging occasions are transmitted during cell active DTX periods.

[0071] In an embodiment, the distribution of paging occasions within a paging frame may be limited to a number of consecutive time slots within the paging frame. For example, paging occasions may be limited to occur only within five, six or seven consecutive time slots of the ten time slots within a paging frame. In an embodiment, the first time slot of a limited set of time slots is the first slot in a paging frame, e.g. frame 0. This can be accomplished by modifying the paging occasion calculation shown above, and / or by usinga lookup table in which the paging occasions are condensed into a limited number of time slots.

[0072] In an embodiment, RACH occasions may be adapted in the time domain so that the cell receives RACH transmissions from UEs within an active DRX period of the cell. For example, RACH occasions may be scheduled to occur during overlapping portions of active durations of a cell and a UE. The RACH occasions may be adapted using similar techniques to the techniques for adapting paging occasions discussed above by considering the active time period of cell.

[0073] Figure 6 illustrates an example of a UE 600 in accordance with aspects of the present disclosure. The UE 600 may include a processor 602, a memory 604, a controller 606, and a transceiver 608. The processor 602, the memory 604, the controller 606, or the transceiver 608, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.

[0074] The processor 602, the memory 604, the controller 606, or the transceiver 608, or various combinations or components thereof may be implemented in hardware (e.g., circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.

[0075] The processor 602 may include an intelligent hardware device (e.g., a general- purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some implementations, the processor 602 may be configured to operate the memory 604. In some other implementations, the memory 604 may be integrated into the processor 602. The processor 602 may be configured to execute computer-readable instructions stored in the memory 604 to cause the UE 600 to perform various functions of the present disclosure.

[0076] The memory 604 may include volatile or non-volatile memory. The memory 604 may store computer-readable, computer-executable code including instructions whenexecuted by the processor 602 cause the UE 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such the memory 604 or another type of memory. Computer-readable media includes both non- transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.

[0077] In some implementations, the processor 602 and the memory 604 coupled with the processor 602 may be configured to cause the UE 600 to perform one or more of the functions described herein (e.g., executing, by the processor 602, instructions stored in the memory 604). For example, the processor 602 may support wireless communication at the UE 600 in accordance with examples as disclosed herein. The UE 600 may be configured to support a means for determining at least one first slot for receiving a paging frame and receiving, from the network entity, a paging message during at least one paging occasion of the paging frame.

[0078] The controller 606 may manage input and output signals for the UE 600. The controller 606 may also manage peripherals not integrated into the UE 600. In some implementations, the controller 606 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some implementations, the controller 606 may be implemented as part of the processor 602.

[0079] In some implementations, the UE 600 may include at least one transceiver 608. In some other implementations, the UE 600 may have more than one transceiver 608. The transceiver 608 may represent a wireless transceiver. The transceiver 608 may include one or more receiver chains 610, one or more transmitter chains 612, or a combination thereof.

[0080] A receiver chain 610 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receiver chain 610 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 610 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. The receiver chain 610 may include at least one demodulator configured to demodulate the receive signal and obtain thetransmitted data by reversing the modulation technique applied during transmission of the signal. The receiver chain 610 may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.

[0081] A transmitter chain 612 may be configured to generate and transmit signals (e.g., control information, data, packets). The transmitter chain 612 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM). The transmitter chain 612 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmitter chain 612 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0082] Figure 7 illustrates an example of a processor 700 in accordance with aspects of the present disclosure. The processor 700 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 700 may include a controller 702 configured to perform various operations in accordance with examples as described herein. The processor 700 may optionally include at least one memory 704, which may be, for example, an L1 / L2 / L3 cache. Additionally, or alternatively, the processor 700 may optionally include one or more arithmetic-logic units (ALUs) 706. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses).

[0083] The processor 700 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 700) or other memory (e.g., random access memory (RAM), read-only memory (ROM), dynamic RAM (DRAM),synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase change memory (PCM), and others).

[0084] The controller 702 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. For example, the controller 702 may operate as a control unit of the processor 700, generating control signals that manage the operation of various components of the processor 700. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.

[0085] The controller 702 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 704 and determine subsequent instruction(s) to be executed to cause the processor 700 to support various operations in accordance with examples as described herein. The controller 702 may be configured to track memory address of instructions associated with the memory 704. The controller 702 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 702 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 702 may be configured to manage flow of data within the processor 700. The controller 702 may be configured to control transfer of data between registers, arithmetic logic units (ALUs), and other functional units of the processor 700.

[0086] The memory 704 may include one or more caches (e.g., memory local to or included in the processor 700 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 704 may reside within or on a processor chipset (e.g., local to the processor 700). In some other implementations, the memory 704 may reside external to the processor chipset (e.g., remote to the processor 700).

[0087] The memory 704 may store computer-readable, computer-executable code including instructions that, when executed by the processor 700, cause the processor 700 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 702 and / or the processor 700 may be configured to execute computer-readable instructions stored in the memory 704 to cause the processor 700 to perform various functions. For example, the processor 700 and / or the controller 702 may be coupled with or to the memory 704, the processor 700, the controller 702, and the memory 704 may be configured to perform various functions described herein. In some examples, the processor 700 may include multiple processors and the memory 704 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.

[0088] The one or more ALUs 706 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 706 may reside within or on a processor chipset (e.g., the processor 700). In some other implementations, the one or more ALUs 706 may reside external to the processor chipset (e.g., the processor 700). One or more ALUs 706 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 706 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 706 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 706 may support logical operations such as AND, OR, exclusive-OR (XOR), not-OR (NOR), and not- AND (NAND), enabling the one or more ALUs 706 to handle conditional operations, comparisons, and bitwise operations.

[0089] The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may be configured to or operable to support a means for determining at least one first slot for receiving a paging frame andreceiving, from the network entity, a paging message during at least one paging occasion of the paging frame.

[0090] Figure 8 illustrates an example of a NE 800 in accordance with aspects of the present disclosure. The NE 800 may include a processor 802, a memory 804, a controller 806, and a transceiver 808. The processor 802, the memory 804, the controller 806, or the transceiver 808, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.

[0091] The processor 802, the memory 804, the controller 806, or the transceiver 808, or various combinations or components thereof may be implemented in hardware (e.g., circuitry). The hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.

[0092] The processor 802 may include an intelligent hardware device (e.g., a general- purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some implementations, the processor 802 may be configured to operate the memory 804. In some other implementations, the memory 804 may be integrated into the processor 802. The processor 802 may be configured to execute computer-readable instructions stored in the memory 804 to cause the NE 800 to perform various functions of the present disclosure.

[0093] The memory 804 may include volatile or non-volatile memory. The memory 804 may store computer-readable, computer-executable code including instructions when executed by the processor 802 cause the NE 800 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such the memory 804 or another type of memory. Computer-readable media includes both non- transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.

[0094] In some implementations, the processor 802 and the memory 804 coupled with the processor 802 may be configured to cause the NE 800 to perform one or more of the functions described herein (e.g., executing, by the processor 802, instructions stored in the memory 804). For example, the processor 802 may support wireless communication at the NE 800 in accordance with examples as disclosed herein. The NE 800 may be configured to support a means for determining at least one first slot for transmitting a paging frame to a UE, and transmitting, to the UE, a paging message during at least one PO of a paging frame, wherein the at least one PO occurs during the at least one active duration of a DRX cycle associated with the UE and the at least one active duration of a DTX cycle associated with a cell.

[0095] The controller 806 may manage input and output signals for the NE 800. The controller 806 may also manage peripherals not integrated into the NE 800. In some implementations, the controller 806 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems. In some implementations, the controller 806 may be implemented as part of the processor 802.

[0096] In some implementations, the NE 800 may include at least one transceiver 808. In some other implementations, the NE 800 may have more than one transceiver 808. The transceiver 808 may represent a wireless transceiver. The transceiver 808 may include one or more receiver chains 810, one or more transmitter chains 812, or a combination thereof.

[0097] A receiver chain 810 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receiver chain 810 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 810 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal. The receiver chain 810 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receiver chain 810 may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.

[0098] A transmitter chain 812 may be configured to generate and transmit signals (e.g., control information, data, packets). The transmitter chain 812 may include at least onemodulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM). The transmitter chain 812 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmitter chain 812 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.

[0099] Figure 9 illustrates a flowchart of a method in accordance with aspects of the present disclosure. The operations of the method may be implemented by a UE as described herein. In some implementations, the UE may execute a set of instructions to control the function elements of the UE to perform the described functions.

[0100] At 902, the method may include determining at least one first slot for receiving a paging frame. The operations of 902 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 902 may be performed by a UE as described with reference to Figure 6. In an embodiment, the at least one first slot at least partially overlaps with at least one active duration of a DRX cycle associated with the UE and at least one active duration of a DTX cycle associated with a network entity, e.g. an active duration of a cell.

[0101] At 904, the method may include receiving, from the network entity, a paging message during at least one PO of a paging frame. The at least one PO may occur during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity. The operations of 904 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 904 may be performed by a UE as described with reference to Figure 6.

[0102] In an embodiment, a first subset of POs of the set of POs is associated with a set of one or more frequencies and the at least one first slot, a second subset of POs of the set of POs is associated with the set of one or more frequencies and at least one second slot different than the at least one first slot, the at least one PO is associated with the first subsetof POs or the second subset of POs, and the at least one PO is associated with at least one frequency of the set of one or more frequencies.

[0103] In an embodiment, a beginning of the at least one active duration of the DRX cycle associated with the UE may align with a beginning of the at least one active duration of the DTX cycle associated with the network entity.

[0104] In some embodiments, the method may further comprise determining a set of POs of the paging frame.

[0105] In an embodiment, the UE is configured to determine the at least one active duration of the DRX cycle associated with the UE that partially overlaps with the at least one active duration of the DTX cycle associated with the network entity, and / or to determine the at least one active duration of the DRX cycle associated with the UE that fully overlaps with the at least one active duration of the DTX cycle associated with the network entity. Cell active times may be indicated by a base station to a UE. When UE active durations do not overlap at all with cell active durations, a new I-DRX cycle may be activated at the UE that at least partially overlaps with an active cell duration.

[0106] At 906, the method may include selecting a PO out of a set of POs of a paging frame. The operations of 906 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 906 may be performed a UE as described with reference to Figure 6.

[0107] In an embodiment, the at least one RO is associated with the at least one frequency of the set of one or more frequencies. After selecting the PO, the UE may transmit at least one first random access message during the at least one RO and on the at least one frequency of the set of one or more frequencies.

[0108] The UE may be configured to receive an indication associated with a lookup table that indicates one or more of a frequency indicator for each of set of one or more POs of the paging frame, a set of one or more slots associated with the set of one or more POs of the paging frame, or a slot number for each slot of the set of one or more slots within the paging frame.

[0109] In an embodiment, the UE is further configured to determine at least one second PO of the set of one or more POs occurring outside the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity, and skip the at least one second PO based at least in part on the at least one second PO of the set of one or more POs occurring outside the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity.

[0110] At 908, the method may include monitoring for or receiving at least one second random access message from the network entity responding to the first random access message during an active duration of the DTX cycle associated with the network entity. In some implementations, aspects of the operations of 908 may be performed by a UE as described with reference to Figure 6.

[0111] For example, a ra-ResponseWindow may be started at the first PDCCH occasion configured with RA-RNTI (Random access RNTI) from the end of the Random Access Preamble transmission within the active time of the cell. The ra-ResponseWindow may skip non-active cell DTX / DRX periods and calculates the ra-ResponseWindow within the active period of the cell.

[0112] At 910, the method may include determining a timing offset for a paging frame and applying the timing offset to the paging frame. The operations of 910 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 910 may be performed by a UE as described with reference to Figure 6. In an embodiment, the at least one PO of the paging frame occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity based at least in part on the timing offset for the paging frame.

[0113] At 912, the method may include receiving DCI via the PDCCH and decoding the DCI using an RNTI associated with a paging group which includes the UE. The operations of 912 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 906 may be performed a UE as described with reference to Figure 6.

[0114] In an embodiment, the decoded DCI indicates at least one frequency sub-band and at least one first slot for a transmission of the paging message. The RNH associated with the paging group may be selected from a set of RNTIs that are reserved for paging groups.

[0115] It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.

[0116] Figure 10 illustrates a flowchart of a method in accordance with aspects of the present disclosure. The operations of the method may be implemented by a NE as described herein. In some implementations, the NE may execute a set of instructions to control the function elements of the NE to perform the described functions.

[0117] At 1002, the method may include determining at least one first slot for transmitting a paging frame to a UE. The operations of 1002 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1002 may be performed by a NE as described with reference to Figure 7.

[0118] In an embodiment, the at least one first slot is based at least in part on at least one active duration of a DRX cycle associated with the UE or at least one active duration of a DTX cycle associated with a base station, or a combination thereof. In an example, the first slot occurs during an active DRX duration of the UE and an active DTX duration of the base station.

[0119] At 1004, the method may include transmitting, to the UE, a paging message during at least one PO of a paging frame. The operations of 1004 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1004 may be performed by a NE as described with reference to Figure 7.

[0120] In an embodiment, the at least one PO occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the base station.

[0121] At 1006, the method may include generating a paging frame according to one or more of the DRX cycle associated with the UE or the DTX cycle associated with the base station. The operations of 1006 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1006 may be performed a NE as described with reference to Figure 7.

[0122] In an embodiment, the at least one first slot overlaps with one or more of the at least one active duration of the DRX cycle associated with the UE or the at least one active duration of the DTX cycle associated with the base station according to one or more of the DRX cycle associated with the UE or the DTX cycle associated with the base station.

[0123] At 1008, the method may include scrambling DCI using a RNTI associated with a paging group including the UE. The operations of 1006 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1006 may be performed a NE as described with reference to Figure 7.At 1010, the method may include transmitting the DCI scrambled with the RNTI to the UE in a PDCCH. The operations of 1006 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1006 may be performed a NE as described with reference to Figure 7. The DCI scrambled with the RNTI may indicate at least one frequency sub-band and the at least one first time slot associated with the paging message.

[0124] It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.

[0125] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

CLAIMSWhat is claimed is:

1. A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: determine at least one first slot for receiving a paging frame, wherein the at least one first slot at least partially overlaps with at least one active duration of a discontinuous reception (DRX) cycle associated with the UE and at least one active duration of a discontinuous transmission (DTX) cycle associated with a network entity; and receive, from the network entity, a paging message during at least one paging occasion (PO) of the paging frame, wherein the at least one PO occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity.

2. The UE of claim 1, wherein the at least one processor is configured to cause the UE to: select the at least one PO of a set of POs of the paging frame, wherein a first subset of POs of the set of POs is associated with a set of one or more frequencies and the at least one first slot, wherein a second subset of POs of the set of POs is associated with the set of one or more frequencies and at least one second slot different than the at least one first slot, wherein the at least one PO is associated with the first subset of POs or the second subset of POs, and wherein the at least one PO is associated with at least one frequency of the set of one or more frequencies.

3. The UE of claim 2, wherein the at least one processor is configured to cause the UE to: select at least one random access channel occasion (RO) based at least in part on a mapping between the at least one PO and the at least one RO, wherein the at least one RO is associated with the at least one frequency of the set of one or more frequencies; and transmit at least one first random access message during the at least one RO and on the at least one frequency of the set of one or more frequencies.

4. The UE of claim 2, wherein the at least one processor is configured to cause the UE to: determine a timing offset for the paging frame; and apply the timing offset to the paging frame, wherein the at least one PO of the paging frame occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity based at least in part on the timing offset for the paging frame.

5. The UE of claim 3, wherein the at least one processor is configured to cause the UE to: monitor for or receive at least one second random access message from the network entity responding to the at least one first random access message during an active duration of the DTX cycle associated with the network entity.

6. The UE of claim 1, wherein the at least one processor is configured to cause the UE to: receive downlink control information (DCI) via a physical downlink control channel (PDCCH); and decode the DCI using a radio network temporary identifier (RNTI) associated with a paging group including the UE.

7. The UE of claim 6, wherein the decoded DCI indicates at least one frequency sub-band and the at least one first slot for a transmission of the paging message.

8. The UE of claim 6, wherein the RNH associated with the paging group is selected from a set of RNTIs reserved for paging groups.

9. The UE of claim 1, wherein the at least one processor is configured to cause the UE to: determine at least one active duration of the DRX cycle associated with the UE that overlaps with the at least one active duration of the DTX cycle associated with the network entity.

10. A processor for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: determine at least one first slot for receiving a paging frame, wherein the at least one first slot at least partially overlaps with at least one active duration of a discontinuous reception (DRX) cycle associated with a user equipment (UE) and at least one active duration of a discontinuous transmission (DTX) cycle associated with a network entity; and receive, from the network entity, a paging message during at least one paging occasion (PO) of the paging frame, wherein the at least one PO occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity.

11. A method performed by a user equipment (UE), the method comprising: determining at least one first slot for receiving a paging frame, wherein the at least one first slot at least partially overlaps with at least one active duration of a discontinuous reception (DRX) cycle associated with the UE and at least one active duration of a discontinuous transmission (DTX) cycle associated with a network entity; and receiving, from the network entity, a paging message during at least one paging occasion (PO) of the paging frame, wherein the at least one PO occurs during the at leastone active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity.

12. The method of claim 11, further comprising: selecting the at least one PO of a set of POs of the paging frame, wherein a first subset of POs of the set of POs is associated with a set of one or more frequencies and the at least one first slot, wherein a second subset of POs of the set of POs is associated with the set of one or more frequencies and at least one second slot different than the at least one first slot, wherein the at least one PO is associated with the first subset of POs or the second subset of POs, and wherein the at least one PO is associated with at least one frequency of the set of one or more frequencies.

13. The method of claim 12, further comprising: selecting at least one random access channel occasion (RO) based at least in part on a mapping between the at least one PO and the at least one RO, wherein the at least one RO is associated with the at least one frequency of the set of one or more frequencies; and transmit at least one first random access message during the at least one RO and on the at least one frequency of the set of one or more frequencies.

14. The method of claim 12, further comprising: determining a timing offset for the paging frame; and applying the timing offset to the paging frame, wherein the at least one PO of the paging frame occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the network entity based at least in part on the timing offset for the paging frame.

15. The method of claim 13, further comprising:monitoring for or receiving at least one second random access message from the network entity responding to the at least one first random access message during an active duration of the DTX cycle associated with the network entity.

16. The method of claim 11, further comprising: receiving downlink control information (DCI) via a physical downlink control channel (PDCCH); and decoding the DCI using a radio network temporary identifier (RNH) associated with a paging group including the UE.

17. The method of claim 16, wherein the decoded DCI indicates at least one frequency sub-band and the at least one first slot for a transmission of the paging message, and wherein the RNTI associated with the paging group is selected from a set of RNTIs reserved for paging groups.

18. A base station for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the base station to: determine at least one first slot for transmitting a paging frame to a user equipment (UE), wherein the at least one first slot is based at least in part on at least one active duration of a discontinuous reception (DRX) cycle associated with the UE or at least one active duration of a discontinuous transmission (DTX) cycle associated with the base station, or a combination thereof; and transmit, to the UE, a paging message during at least one paging occasion (PO) of a paging frame, wherein the at least one PO occurs during the at least one active duration of the DRX cycle associated with the UE and the at least one active duration of the DTX cycle associated with the base station.

19. The base station of claim 18, wherein the at least one processor is configured to cause the base station to:generate the paging frame according to one or more of the DRX cycle associated with the UE or the DTX cycle associated with the base station, wherein the at least one first slot overlaps with one or more of the at least one active duration of the DRX cycle associated with the UE or the at least one active duration of the DTX cycle associated with the base station according to one or more of the DRX cycle associated with the UE or the DTX cycle associated with the base station.

20. The base station of claim 18, wherein the at least one processor is configured to cause the base station to: scramble downlink control information (DCI) using a radio network temporary identifier (RNTI) associated with a paging group including the UE; and transmit the DCI scrambled with the RNTI to the UE in a physical downlink control channel (PDCCH), wherein the DCI scrambled with the RNTI indicates at least one frequency sub-band and the at least one first slot associated with the paging message.

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