C-DRX coordination for musim ue

Abstract

A user equipment (UE) includes at least one wireless transceiver and a processor. The processor is configured to determine to operate in a first C-DRX mode with a first network and in a second C-DRX mode with a second network. The processor is further configured to transmit UE assistance information to a first base station of the first network via one of the at least one wireless transceiver, the UE assistance information comprising: 1) a C-DRX offset for the request of the first C-DRX mode; or (2) the C-DRX configuration of the first C-DRX mode.

Description

Technical Field

[0001] The present application generally relates to a user equipment (UE) operating with a first network and a second network in a first connected mode discontinuous reception (C-DRX) mode and a second C-DRX mode. In some embodiments, the UE may be a Multiple Universal Subscriber Identity Module (MUSIM) UE. Background Art

[0002] Wireless mobile communication technologies use various standards and protocols to send data between base stations and wireless communication devices. Wireless communication system standards and protocols may include, for example, the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) (e.g., 4G), 3GPP New Radio (NR) (e.g., 5G), and the IEEE 802.11 standard for wireless local area networks (WLANs) (commonly referred to within industry organizations as WLANs). ).

[0003] As envisioned by 3GPP, different wireless communication system standards and protocols may use various radio access networks (RANs) for communication between base stations (sometimes also collectively referred to as RAN nodes, network nodes, or simply nodes) of the RAN and wireless communication devices referred to as UEs. The 3GPP RAN may include, for example, Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE) RAN (GERAN), Universal Terrestrial Radio Access Network (UTRAN), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and / or Next Generation Radio Access Network (NG-RAN).

[0004] Each RAN may use one or more radio access technologies (RATs) to perform communications between base stations and UEs. For example, GERAN implements GSM and / or EDGE RAT, UTRAN implements Universal Mobile Telecommunications System (UMTS) RAT or other 3GPP RAT, E-UTRAN implements LTE RAT (sometimes referred to as LTE), and NG-RAN implements NR RAT (sometimes referred to herein as 5G RAT, 5G NR RAT, or NR). In some deployments, E-UTRAN may also implement NR RAT. In some deployments, NG-RAN may also implement LTE RAT.

[0005] The base stations used by the RAN may correspond to the RAN. An example of an E-UTRAN base station is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (also commonly denoted as an evolved Node B, enhanced Node B, eNodeB, or eNB). An example of an NG-RAN base station is a Next Generation Node B (sometimes also referred to as a gNodeB or gNB).

[0006] The RAN provides communication services together with external entities through its connection with the Core Network (CN). For example, E-UTRAN may utilize the Evolved Packet Core (EPC) and NG-RAN may utilize the 5G Core Network (5GC). BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To easily identify the discussion of any particular element or action, the most significant digit(s) in a reference number refers to the drawing number that first introduces the element.

[0008] Figure 1 An example of a wireless communication system including a UE connected to a first network and a second network is shown.

[0009] Figure 2 An example timeline is shown that determines the operation of a UE operating in C-DRX mode with a network (eg, a 3GPP network).

[0010] Figure 3 An example timeline of operation of a UE that has determined to operate in a first C-DRX mode with a first network (e.g., a first 3GPP network) and in a second C-DRX mode with a second network (e.g., a second 3GPP network or a CBRS network) is illustrated.

[0011] Figure 4 Another example timeline of operation of a UE that has determined to operate in a first C-DRX mode with a first network (e.g., a first 3GPP network) and in a second C-DRX mode with a second network (e.g., a second 3GPP network or a CBRS network) is illustrated.

[0012] Figure 5 An example flow chart for configuring a C-DRX cycle is illustrated.

[0013] Figure 6 A first example method of wireless communication by a UE is shown.

[0014] Figure 7 A first example method of wireless communications by a base station is shown.

[0015] Figure 8 A second example method of wireless communication by a UE is shown.

[0016] Fig. 9 A second example method of wireless communications by a base station is shown.

[0017] Fig.10 An example architecture of a wireless communication system according to embodiments disclosed herein is illustrated.

[0018] Fig.11A system for performing signaling between a wireless device and a network device according to embodiments disclosed herein is illustrated. DETAILED DESCRIPTION

[0019] Various embodiments are described with respect to UE. However, reference to UE is provided for illustrative purposes only. The example embodiments may be used with any electronic component that can establish a connection with a network and is configured with hardware, software and / or firmware for exchanging information and data with the network. Therefore, UE described herein is used to represent any suitable electronic device.

[0020] Figure 1 An example wireless communication system 100 is shown. The wireless communication system includes a UE 102 connected to a first network and a second network. More specifically, the UE 102 is connected to a first base station 104 of the first network and to a second base station 106 of the second network. The UE 102 can communicate with each of the first network and the second network on an uplink (UL) and / or a downlink (DL).

[0021] In some embodiments, UE 102 may be a MUSIM UE, i.e., a UE including multiple USIMs, each of which may be used to communicate over a different network (e.g., a first network or a second network). In some embodiments, the first network and / or the second network may be a 3GPP network. In some embodiments, each of the first networks may be a Citizen Broadband Radio Service (CRES) network.

[0022] If the UE 102 has only a single wireless transceiver (e.g., a single transmit / receive (Tx / Rx) chain), the UE 102 can communicate with the first network and the second network (e.g., the first base station 104 and the second base station 106) at different times. If the UE 102 has two or more wireless transceivers (e.g., two or more Tx / Rx chains), the UE 102 can communicate with the first network and the second network at the same time.

[0023] Figure 2 An example timeline 200 is shown to determine the operation of a UE operating in C-DRX mode with a network (e.g., a 3GPP network or a CBRS network). In some embodiments, the UE may be a reference Figure 1 The UE described and the network may be the same as reference Figure 1 Describes a base station in a network in which a base station is associated.

[0024] The UE may determine that it desires to operate in C-DRX mode because its power is low (e.g., its remaining battery power is below a threshold level); because its user has placed it in low power mode; or for other reasons. After determining to operate in C-DRX mode, the UE may notify the network, and the network may use RRC signaling to indicate the parameters under which the UE may operate in C-DRX mode. The parameters may include, for example, an indication of a long DRX cycle 202 (e.g., drx-LongCycle), a DRX slot offset 204 (e.g., drx-SlotOffset), and a DRX inactivity timer 206 (e.g., drx-InactivityTimer).

[0025] The DRX cycle 202 indicates a DRX on duration 208 (e.g., drx-onDurationTimer) and an optional DRX off duration 210 (e.g., drx-offDurationTimer) for a long DRX cycle (e.g., long DRX cycle #n, long DRX cycle #n+1, ...). The DRX on duration 208 indicates how long the UE should remain awake (e.g., to receive scheduling information or DL ​​transmissions) during each DRX cycle before going back to sleep (e.g., entering a low power state) in the absence of a PDCCH opportunity identifying a subsequent arrival in which the PDCCH indicates a new UL or DL ​​transmission for the UE. If an off duration has not been indicated or implied, the DRX off duration 210 indicates how long the UE should sleep during each DRX cycle. The DRX slot offset 204 indicates when the DRX on duration 208 starts relative to a slot boundary. The DRX inactivity timer 206 indicates how long the UE should remain awake after a PDCCH opportunity in which the PDCCH indicates a new UL or DL ​​transmission for the MAC entity of the UE. If, within the duration of the DRX Inactivity Timer 206, the UE identifies another PDCCH occasion where the PDCCH indicates a new UL or DL ​​transmission for the MAC entity of the UE, the DRX Inactivity Timer 206 may be reset and extended.

[0026] When the UE is in the RRC_CONNECTED state with each of the two networks, the UE may determine that it is desired to operate in C-DRX mode with each of the networks. For example, the UE may determine to operate in a first C-DRX mode with the first network and in a second C-DRX mode with the second network. The UE may use a different USIM for each network and may use a single or multiple wireless transceivers (or transmit / receive (Tx / Rx) chains) to communicate with each network.

[0027] After the UE determines to operate in C-DRX mode with each of the two networks (or more than two networks), it may be useful for the UE to coordinate the wake-up time of its C-DRX mode with the network. In this regard, the UE may strive for different types of coordination depending on its configuration. For example, if the UE has only one wireless transceiver (e.g., a single Tx / Rx chain) and cannot transmit or receive on two or more networks at the same time, the UE may strive for coordination that staggers its DRX on time for the C-DRX mode for different networks (e.g., coordination that strives to place the DRX on times one after another or to space them apart by a gap). In some cases, the UE may strive for DRX on times that are adjacent or close in time so that the UE can wake up once to meet both DRX on times. If the traffic flow of one network is expected to be larger or more variable in size or duration, the UE may strive to position the DRX on time of that network after the DRX on time of other networks. If the traffic flow of both networks is expected to be greater than a threshold, the UE may strive to separate the DRX on times of the networks by a gap to reduce the possibility that a possible extension of the DRX inactivity timer of one network may interfere with the UE starting the DRX on time of the other network. As another example, if the UE has two or more wireless transceivers (e.g., two or more Tx / Rx chains) and can transmit or receive on two or more networks simultaneously, the UE may strive for coordination that overlaps its DRX on times for C-DRX mode for different networks and aligns the DRX on times for different networks in some cases. In this way, the UE may be able to wake up, transmit or receive on two networks simultaneously, and go back to sleep, thereby saving power.

[0028] Figure 3 An example timeline 300 of the operation of a UE that has determined to operate in a first C-DRX mode with a first network (e.g., a first 3GPP network) and in a second C-DRX mode with a second network (e.g., a second 3GPP network or a CBRS network) is shown. In some embodiments, the UE may be a reference Figures 1 to 11 , and the first network and the second network may be respectively connected to the reference Figures 1 to 11 A network in which a first base station and a second base station are associated as described in any one of the preceding claims. Figure 3 In the example shown in , the UE may have two or more wireless transceivers.

[0029] Since the UE has two or more radio transceivers, the UE may seek to coordinate the first C-DRX mode and the second C-DRX mode so that the DRX on times 302, 304 of the first C-DRX mode and the second C-DRX mode overlap, and in some cases align. In this way, the UE may wake up, transmit or receive on the first network and the second network at the same time, and go back to sleep while saving a maximum amount of power. In order to overlap or align the DRX on times 302, 304 of the first C-DRX mode and the second C-DRX mode, the UE may have to request a specific DRX offset adjustment 306 or 308 from one or both of the first network or the second network. Currently, there is no mechanism for the UE to do this.

[0030] Figure 4 Another example timeline 400 of the operation of a UE that has determined to operate in a first C-DRX mode with a first network (e.g., a first 3GPP network) and in a second C-DRX mode with a second network (e.g., a second 3GPP network or a CBRS network) is shown. In some embodiments, the UE may be a reference Figures 1 to 11 , and the first network and the second network may be respectively connected to the reference Figures 1 to 11 A network in which a first base station and a second base station are associated as described in any one of the preceding claims. Figure 4 In the example shown in , the UE may have a single wireless transceiver.

[0031] Since the UE has only one radio transceiver, the UE may endeavor to coordinate the first C-DRX mode and the second C-DRX mode such that the DRX on times 402, 404 of the first C-DRX mode and the second C-DRX mode are staggered. In some cases, the DRX on times 402, 404 may be adjacent (or close) in time so that the UE may wake up, transmit or receive on one network, transmit or receive on another network, and go back to sleep while conserving a maximum amount of power. In order to stagger the DRX on times 402, 404 of the first C-DRX mode and the second C-DRX mode, the UE may have to request a specific DRX offset adjustment 406 or 408 from one or both of the first network or the second network. Currently, there is no mechanism for the UE to do this.

[0032] Since 3GPP Release 16 (Rel-16), the UE has been able to use UE assistance information to request the following parameters from the network: preferred DRX long cycle (e.g., preferredDRX-LongCycle or preferredDRX-ShortCycle), DRX inactivity timer (e.g., preferredDRX-InactivityTimer), or preferred DRX short cycle (e.g., preferredDRX-ShortCycleTimer). However, the UE has not been able to request a DRX offset adjustment (e.g., preferred DRX slot offset). Therefore, the UE may experience one of two suboptimal scenarios. The first optimal scenario is that a UE with a single radio transceiver (e.g., a single Tx / Rx chain) may have a DRX on-Duration for its C-DRX mode with different networks scheduled at the same time. Such a UE will be forced to miss its DRX on-Duration with one of the networks. The second best scenario is that a UE with two or more radio transceivers (e.g., two or more Tx / Rx chains) may have a DRX On Duration for its C-DRX mode where different networks are scheduled at different times. For different DRX On Durations, such a UE will be forced to wake up twice, even though it can wake up once and transmit or receive on both networks simultaneously. Figures 5 to 9 Solutions for reducing the likelihood that any of these suboptimal scenarios will occur are described elsewhere herein.

[0033] Figure 5 An example flow chart 500 for configuring a C-DRX cycle is shown. The operations of the flow chart are performed by a UE 502, a first network 504 (e.g., a first base station 506), or a second network 508 (e.g., a second base station 510). By way of example, the UE 502, the first base station 506, and the second base station 510 may be reference Figure 1 The UE, the first base station and the second base station are described.

[0034] At 512 and 514 , UE 502 may simultaneously maintain a first RRC_CONNECTED state with first network 504 and a second RRC_CONNECTED state with second network 508 .

[0035] At 516, the UE 502 may determine to operate in the first C-DRX mode with the first network 504 and in the second C-DRX mode with the second network 508 while maintaining the first RRC_CONNECTED state and the second RRC_CONNECTED state.

[0036] At 518 , the UE 502 may communicate with the second network 508 , establish parameters for operating in the second C-DRX mode, and begin operating with the second network 508 in the second C-DRX mode.

[0037] At 520, UE 502 may send UE assistance information to the first network 504. In some embodiments, the UE assistance information may include DRX parameters requested by UE 502 to coordinate the first C-DRX mode with the second C-DRX mode. These embodiments may be referred to herein as UE-controlled embodiments. In some embodiments, the UE assistance information may include parameters of the second C-DRX mode (e.g., a C-DRX configuration of the second C-DRX mode). These latter embodiments may be referred to herein as network-controlled embodiments.

[0038] At 522, UE 502 may receive parameters of the first C-DRX mode (e.g., a C-DRX configuration of the first C-DRX mode) from the first network 504. The first C-DRX mode may or may not be coordinated with the second C-DRX mode at the discretion of the first network.

[0039] At 524 , UE 502 may begin operating with first network 504 in a first C-DRX mode.

[0040] In some embodiments of flowchart 500, UE 502 may determine that the first C-DRX mode is not coordinated with the second C-DRX mode. In these embodiments, the UE may optionally repeat the operations at 520 and 522, but determine whether the second network 508 will coordinate the second C-DRX mode with the first C-DRX mode in the context of sending UE assistance information to the second network 508.

[0041] Figure 6 A first example method 600 of wireless communication performed by a UE is shown. The method 600 may be performed by a processor of the UE, and the UE may communicate with a first network or a second network via one or more wireless transceivers of the UE. In some embodiments, the UE may be a reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Fig.10 or Fig.11 UE described by any one of .

[0042] At 602, the UE may determine to operate in a first C-DRX mode with a first network and in a second C-DRX mode with a second network.

[0043] At 604, the UE may send UE assistance information to the first base station of the first network and via the wireless transceiver of the UE, the UE assistance information including a C-DRX offset for the request of the first C-DRX mode. The C-DRX offset may include at least one of a long cycle DRX start offset or a DRX slot offset. The UE assistance information may also include an upper boundary of an inactivity timer for the request of the first C-DRX mode or other parameters for the request of the first C-DRX mode.

[0044] In some embodiments of method 600, the UE may maintain a first RRC_CONNECTED state with the first network, and maintain a second RRC_CONNECTED state with the second network while maintaining the first RRC_CONNECTED state. When such a UE is receiving and / or sending traffic from / to the first network and the second network, but one or more conditions are met, the UE may determine to operate in the first C-DRX mode and the second C-DRX mode while maintaining the first RRC_CONNECTED state and the second RRC_CONNECTED state. The one or more conditions may include, for example, determining that the battery power of the UE is below a threshold level, or determining that traffic from / to the first network and the second network is infrequent.

[0045] When determining to operate in a first C-DRX mode and a second C-DRX mode, the UE may strive to coordinate the first C-DRX mode with the second C-DRX mode. The coordination may be based on the capabilities of the UE. For example, if the UE has only a single wireless transceiver (e.g., a single Tx / Rx chain), or if the UE is intended to maintain the first RRC_CONNECTED state and the second RRC_CONNECTED state only via a single wireless transceiver, the UE may strive to stagger the first C-DRX on time of the first C-DRX mode with the second C-DRX on time of the second C-DRX mode. To this end, at 604, the UE may request a C-DRX offset and / or other parameters for the first C-DRX mode so that these parameters will cause the first C-DRX on time to be staggered with the second C-DRX on time.

[0046] As another example of C-DRX mode coordination, if the UE has two or more radio transceivers (e.g., two or more Tx / Rx chains) and intends to maintain a first RRC_CONNECTED state and a second RRC_CONNECTED state via different radio transceivers (e.g., via the first radio transceiver for the first RRC_CONNECTED state and via the second radio transceiver for the second RRC_CONNECTED state), the UE may strive to overlap a first C-DRX on time of the first C-DRX mode with a second C-DRX on time of the second C-DRX mode. To this end, at 604, the UE may request a C-DRX offset and / or other parameters for the first C-DRX mode such that the parameters will cause the first C-DRX on time to overlap with the second C-DRX on time, and in some cases cause the first C-DRX on time to align with the second C-DRX on time. The alignment of the first C-DRX on time with the second C-DRX on time may include the same start time of the C-DRX on time, and in some cases the same end time of the C-DRX on time (assuming that neither on time is extended due to traffic to be received or sent).

[0047] In some embodiments of method 600, the first network may not use the C-DRX offset and / or other parameters requested by the UE to configure the first C-DRX mode. In these embodiments, the UE may determine that the requested C-DRX offset for the first C-DRX mode has not been granted and send second UE assistance information to a second base station of the second network, the second UE assistance information including a second requested C-DRX offset for the second C-DRX mode.

[0048] In some cases, the requested C-DRX offset may be indicated by means of a specific value. In other cases, the requested C-DRX offset may be indicated by means of an index into a codebook of C-DRX offset values ​​(i.e., a set of predetermined C-DRX offset values ​​indicated in the specification, or a set of possible C-DRX offset values ​​provided by the network to the UE).

[0049] In some embodiments of method 600, the UE may additionally or alternatively determine a C-DRX offset (e.g., a value of the C-DRX offset) or other requested parameters for the first C-DRX mode or the second C-DRX mode based on factors other than the number of wireless transceivers the UE has (or the number of wireless transceivers the UE will use to communicate with the first network and the second network). For example, the UE may determine a band combination (i.e., a combination of frequency bands) to be used for communicating with the first network and the second network in the first C-DRX mode and the second C-DRX mode, and additionally or alternatively, determine the requested C-DRX offset based at least in part on whether the same wireless receiver or different wireless receivers will be used for the band combination. This factor is useful because the UE may support some band combinations but not other band combinations for simultaneous communication on different networks.

[0050] In some embodiments of method 600, the UE may determine a first time domain duplex (TDD) configuration of a first network and a second TDD configuration of a second network, and determine a requested C-DRX offset additionally or alternatively based at least in part on the first TDD and the second TDD.

[0051] In some embodiments of method 600, the UE may determine a first expected traffic flow with the first network and a second expected traffic flow with the second network, and additionally or alternatively determine a requested C-DRX offset based at least in part on the first expected traffic flow and the second expected traffic flow.

[0052] Since the UE starts or restarts the inactivity timer each time the PDCCH indicates a subsequent arrival of a new UL or DL ​​transmission for the UE, it is possible for the network to extend the UE's on-duration for the first C-DRX mode or the second C-DRX mode, such that a single C-DRX mode consumes most or all of the DRX cycle and there is no opportunity for the UE to enter its C-DRX on-duration for another network. The possibility of such a scenario occurring may be mitigated if the UE requests an upper bound on the inactivity timer for the first C-DRX mode and / or the second C-DRX mode.

[0053] Method 600 may be as described in reference Figure 1 and Figures 3 to 5 and may be differently embodied, extended or adapted as described elsewhere in this specification.

[0054] Figure 7 A first example method 700 for wireless communication by a base station is shown. The method 700 may be performed by a processor of a base station, and the base station may communicate with one or more UEs via one or more wireless transceivers of the base station. In some embodiments, the base station may be a reference Figure 1 , Figure 3, Figure 4 , Figure 5 , Fig.10 or Fig.11 A base station described in any one of .

[0055] At 702, a base station may communicate with a UE in an RRC_CONNECTED state.

[0056] At 704, the base station may receive UE assistance information from the UE, the UE assistance information including a set of requested parameters for configuring a C-DRX mode of the UE.

[0057] The base station may send a C-DRX configuration for the C-DRX mode to the UE at 706. The C-DRX configuration may or may not use the set of requested parameters.

[0058] At 708, the base station may communicate with the UE according to the C-DRX mode.

[0059] Method 700 may be as described in reference Figure 1 and Figures 3 to 5 and may be differently embodied, extended or adapted as described elsewhere in this specification.

[0060] Figure 8 A second example method 800 of wireless communication performed by a UE is shown. The method 800 may be performed by a processor of the UE, and the UE may communicate with the first network or the second network via one or more wireless transceivers of the UE. In some embodiments, the UE may be a reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Fig.10 or Fig.11 UE described by any one of .

[0061] At 802, the UE may determine to operate in a first C-DRX mode with a first network and in a second C-DRX mode with a second network.

[0062] At 804, the UE may send UE assistance information to the first base station of the first network and via the wireless transceiver of the UE, the UE assistance information including a C-DRX configuration for the second C-DRX mode (e.g., a DRX configuration information element (IE) for the second C-DRX mode).

[0063] At 806, the UE may receive, from the first base station and via the wireless transceiver, a C-DRX configuration for a first C-DRX mode.

[0064] In some embodiments of method 800, the UE assistance information may also include, for example, whether one or more than one radio transceiver can be allocated for communication with the first network when the UE operates in the first C-DRX mode. The UE assistance information may also include one or more of the following: an indication of the TDD configuration of the second network (e.g., TDD-UL-DL-ConfigCommon IE), an indication of the expected traffic flow with the second network (e.g., an indication of the UL traffic mode or the DL traffic mode), or an indication of whether the first network and the second network are synchronized. The latter indication may include, for example, a system frame number (SFN) offset between the first network and the second network and / or a time slot offset between the first network and the second network.

[0065] Method 800 may be as described in reference Figure 1 and Figures 3 to 5 and may be differently embodied, extended or adapted as described elsewhere in this specification.

[0066] Fig. 9 A second example method 900 for wireless communication by a base station is shown. The method 900 may be performed by a processor of a base station, and the base station may communicate with one or more UEs via one or more wireless transceivers of the base station. In some embodiments, the base station may be a reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Fig.10 or Fig.11 A base station described in any one of .

[0067] At 902, a base station communicates with a UE in an RRC_CONNECTED state through a first network. The base station may be a first base station of the first network.

[0068] At 904, the base station may receive UE assistance information from the UE, the UE assistance information including a C-DRX configuration of a second C-DRX mode (e.g., a DRX-Config information element (IE) of a second C-DRX mode used by the UE to communicate with a second base station via a second network).

[0069] The base station may send a C-DRX configuration for the first C-DRX mode to the UE at 906. The C-DRX configuration may or may not coordinate the first C-DRX mode with the second C-DRX mode.

[0070] At 908, the base station may communicate with the UE according to the first C-DRX pattern.

[0071] Method 900 may be as described in reference Figure 1 and Figures 3 to 5and may be differently embodied, extended or adapted as described elsewhere in this specification.

[0072] Embodiments contemplated herein include an apparatus having means for performing one or more elements of method 600, 700, 800, or 900. In the context of method 600 or 800, the apparatus may be, for example, an apparatus of a UE (such as wireless device 1102 as a UE, as described herein). In the context of method 700 or 900, the apparatus may be, for example, an apparatus of a base station (such as network device 1120 as a base station, as described herein).

[0073] Embodiments contemplated herein include one or more non-transitory computer-readable media storing instructions that, when executed by one or more processors of an electronic device, cause the electronic device to perform one or more elements of methods 600, 700, 800, or 900. In the context of methods 600 or 800, the non-transitory computer-readable medium may be, for example, a memory of a UE (such as memory 1106 of wireless device 1102 as a UE, as described herein). In the context of methods 700 or 900, the non-transitory computer-readable medium may be, for example, a memory of a base station (such as memory 1124 of network device 1120 as a base station, as described herein).

[0074] Embodiments contemplated herein include an apparatus having logical components, modules, or circuits for performing one or more elements of methods 600, 700, 800, or 900. In the context of methods 600 or 800, the apparatus may be, for example, an apparatus of a UE (such as wireless device 1102 as a UE, as described herein). In the context of methods 700 or 900, the apparatus may be, for example, an apparatus of a base station (such as network device 1120 as a base station, as described herein).

[0075] Embodiments contemplated herein include an apparatus having one or more processors and one or more computer-readable media that use or store instructions that, when executed by the one or more processors, cause the one or more processors to perform one or more elements of methods 600, 700, 800, or 900. In the context of methods 600 or 800, the apparatus may be, for example, an apparatus of a UE (such as wireless device 1102 as a UE, as described herein). In the context of methods 700 or 900, the apparatus may be, for example, an apparatus of a base station (such as network device 1120 as a base station, as described herein).

[0076] Embodiments contemplated herein include a signal as described in or associated with one or more elements of methods 600 , 700 , 800 , or 900 .

[0077] Embodiments contemplated herein include a computer program or computer program product having instructions, wherein execution of the program by a processor causes the processor to perform one or more elements of methods 600, 700, 800, or 900. In the context of methods 600 or 800, the processor may be a processor of a UE (such as processor 1104 of wireless device 1102 as a UE, as described herein), and the instructions may be located, for example, in the processor of the UE and / or on a memory (such as memory 1106 of wireless device 1102 as a UE, as described herein). In the context of methods 700 or 900, the processor may be a processor of a base station (such as processor 1122 of network device 1120 as a base station, as described herein), and the instructions may be located, for example, in the processor of the base station and / or on a memory (such as memory 1124 of network device 1120 as a base station, as described herein).

[0078] Fig.10 An example architecture of a wireless communication system 1000 according to an embodiment disclosed herein is illustrated. The description provided below is for an example wireless communication system 1000 operating in conjunction with the LTE system standard and / or the 5G or NR system standard provided in the 3GPP technical specifications.

[0079] like Fig.10 As shown, the wireless communication system 1000 includes UE 1002 and UE 1004 (although any number of UEs may be used). In this example, UE 1002 and UE 1004 are illustrated as smartphones (e.g., handheld touch screen mobile computing devices capable of connecting to one or more cellular networks), but may also include any mobile or non-mobile computing device configured for wireless communication. In some embodiments, one or both of UE 1002, 1004 may be a MUSIM UE.

[0080] UE 1002 and UE 1004 may be configured to be communicatively coupled with RAN 1006. In an embodiment, RAN 1006 may be NG-RAN, E-UTRAN, etc. UE 1002 and UE 1004 utilize connections (or channels) (shown as connection 1008 and connection 1010, respectively) with RAN 1006, where each connection (or channel) includes a physical communication interface. RAN 1006 may include one or more base stations, such as base station 1012 and base station 1014, to implement connection 1008 and connection 1010.

[0081] In this example, connection 1008 and connection 1010 are air interfaces that enable such communicative coupling and may conform to the RAT used by RAN 1006, such as, for example, LTE and / or NR.

[0082] In some embodiments, UE 1002 and UE 1004 may also directly exchange communication data via side link interface 1016. UE 1004 is shown as being configured to access an access point (shown as AP 1018) via connection 1020. By way of example, connection 1020 may include a local wireless connection, such as a connection conforming to any IEEE 802.11 protocol, wherein AP 1018 may include In this example, AP 1018 may not be connected to another network (eg, the Internet) through CN 1024.

[0083] In an embodiment, UE 1002 and UE 1004 may be configured to communicate with each other or with base station 1012 and / or base station 1014 over a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication techniques, such as, but not limited to, orthogonal frequency division multiple access (OFDMA) communication techniques (e.g., for downlink communication) or single carrier frequency division multiple access (SC-FDMA) communication techniques (e.g., for uplink and ProSe or sidelink communication), although the scope of the embodiment is not limited in this respect. The OFDM signal may include multiple orthogonal subcarriers.

[0084] In some embodiments, all or part of base station 1012 or base station 1014 may be implemented as one or more software entities running on a server computer as part of a virtual network. In addition, or in other embodiments, base station 1012 or base station 1014 may be configured to communicate with each other via interface 1022. In an embodiment where wireless communication system 1000 is an LTE system (e.g., when CN 1024 is EPC), interface 1022 may be an X2 interface. The X2 interface may be defined between two or more base stations (e.g., two or more eNBs, etc.) connected to EPC and / or between two eNBs connected to EPC. In an embodiment where wireless communication system 1000 is an NR system (e.g., when CN 1024 is 5GC), interface 1022 may be an Xn interface. The Xn interface is defined between two or more base stations (e.g., two or more gNBs, etc.) connected to 5GC, between base station 1012 (e.g., gNB) and eNB connected to 5GC, and / or between two eNBs connected to 5GC (e.g., CN 1024).

[0085] The RAN 1006 is shown as being communicatively coupled to the CN 1024. The CN 1024 may include one or more network elements 1026 configured to provide various data and telecommunication services to customers / subscribers (e.g., UE 1002 and users of UE 1004) connected to the CN 1024 via the RAN 1006. The components of the CN 1024 may be implemented in one physical device or separate physical devices including components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium).

[0086] In an embodiment, CN 1024 may be an EPC, and RAN 1006 may be connected to CN 1024 via an S1 interface 1028. In an embodiment, S1 interface 1028 may be divided into two parts: an S1 user plane (S1-U) interface, which carries traffic data between base station 1012 or base station 1014 and a serving gateway (S-GW); and an S1-MME interface, which is a signaling interface between base station 1012 or base station 1014 and a mobility management entity (MME).

[0087] In an embodiment, CN 1024 may be a 5GC, and RAN 1006 may be connected to CN 1024 via an NG interface 1028. In an embodiment, NG interface 1028 may be divided into two parts: an NG user plane (NG-U) interface, which carries traffic data between base station 1012 or base station 1014 and a user plane function (UPF); and an S1 control plane (NG-C) interface, which is a signaling interface between base station 1012 or base station 1014 and an access and mobility management function (AMF).

[0088] In general, the application server 1030 may be an element that provides applications that use Internet Protocol (IP) bearer resources with the CN 1024 (e.g., packet-switched data services). The application server 1030 may also be configured to support one or more communication services (e.g., VoIP sessions, group communication sessions, etc.) for the UE 1002 and UE 1004 via the CN 1024. The application server 1030 may communicate with the CN 1024 via the IP communication interface 1032.

[0089] Fig.11A system 1100 for performing signaling 1140 between a wireless device 1102 and a network device 1120 according to embodiments disclosed herein is illustrated. The system 1100 may be part of a wireless communication system as described herein. The wireless device 1102 may be, for example, a UE of a wireless communication system. In some embodiments, the wireless device 1102 may be a MUSIM UE. The network device 1120 may be, for example, a base station (e.g., an eNB or a gNB) of a wireless communication system.

[0090] The wireless device 1102 may include one or more processors 1104. The processor 1104 may execute instructions to cause various operations of the wireless device 1102 to be performed, as described herein. The processor 1104 may include one or more baseband processors implemented using, for example, a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0091] The wireless device 1102 may include a memory 1106. The memory 1106 may be a non-transitory computer-readable storage medium storing instructions 1108 (which may include, for example, instructions executed by the processor 1104). The instructions 1108 may also be referred to as program code or a computer program. The memory 1106 may also store data used by the processor 1104 and results calculated by the processor.

[0092] The wireless device 1102 may include one or more transceivers 1110, which may include radio frequency (RF) transmitters and / or receiver circuits that use an antenna 1112 of the wireless device 1102 to facilitate signaling (e.g., signaling 1140) to and / or from the wireless device 1102 with other devices (e.g., network device 1120) in accordance with a corresponding RAT.

[0093] The wireless device 1102 may include one or more antennas 1112 (e.g., one, two, four, or more). For implementations with multiple antennas 1112, the wireless device 1102 may take advantage of the spatial diversity of these multiple antennas 1112 to transmit and / or receive multiple different data streams on the same time-frequency resources. This behavior may be referred to as, for example, multiple-input multiple-output (MIMO) behavior (referring to multiple antennas used at each of the transmitting device and the receiving device to implement this aspect). The MIMO transmission by the wireless device 1102 may be implemented based on precoding (or digital beamforming) applied to the wireless device 1102, which multiplexes the data streams between the antennas 1112 based on known or assumed channel characteristics, so that each data stream is received with appropriate signal strength relative to the other streams and at a desired position in the spatial domain (e.g., the position of the receiver associated with the data stream). Certain embodiments may use a single-user MIMO (SU-MIMO) approach (where data streams are all directed to a single receiver) and / or a multi-user MIMO (MU-MIMO) approach (where separate data streams may be directed to separate (different) receivers in different locations in the spatial domain).

[0094] In certain embodiments with multiple antennas, the wireless device 1102 may implement analog beamforming techniques whereby the phases of signals transmitted by the antennas 1112 are relatively adjusted so that the (joint) transmissions of the antennas 1112 may be directional (this is sometimes referred to as beam steering).

[0095] The wireless device 1102 may include one or more interfaces 1114. The interface 1114 may be used to provide input or output to the wireless device 1102. For example, a wireless device 1102 as a UE may include an interface 1114, such as a microphone, a speaker, a touch screen, buttons, etc., to allow a user of the UE to input and / or output to the UE. Other interfaces of such a UE may be composed of transmitters, receivers, and other circuits (e.g., in addition to the transceiver 1110 / antenna 1112 described above), which allow communication between the UE and other devices and may be performed according to known protocols (e.g., etc.) to perform the operation.

[0096] The wireless device 1102 may include one or more C-DRX coordination modules 1116. The C-DRX coordination module 1116 may be implemented via hardware, software, or a combination thereof. For example, the C-DRX coordination module 1116 may be implemented as a processor, circuit, and / or instructions 1108 stored in the memory 1106 and executed by the processor 1104. In some examples, the C-DRX coordination module 1116 may be integrated within the processor 1104 and / or the transceiver 1110. For example, the C-DRX coordination module 1116 may be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 1104 or the transceiver 1110.

[0097] The C-DRX coordination module 1116 may be used in various aspects of the present disclosure, for example, Figures 1 to 9 Aspects of the present invention. The C-DRX coordination module 1116 may be configured to, for example, send a requested C-DRX parameter for a first C-DRX mode (e.g., a C-DRX mode for another device) of the wireless device 1102 to another device (e.g., a network device 1120). The other device (e.g., the network device 1120) may consider the requested C-DRX parameter when configuring the first C-DRX mode. The requested C-DRX parameter may provide coordination of the first C-DRX mode with the second C-DRX mode. The second C-DRX mode may be used by the wireless device 1102 to communicate with a network device of another network. Alternatively, the C-DRX coordination module 1116 may be configured to, for example, send a configuration of the second C-DRX mode to another device (e.g., the network device 1120) so that the other device may consider the configuration of the second C-DRX mode when configuring the first C-DRX mode for the wireless device 1102.

[0098] The network device 1120 may include one or more processors 1122. The processor 1122 may execute instructions to cause various operations of the network device 1120 to be performed, as described herein. The processor 1104 may include one or more baseband processors implemented using, for example, a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.

[0099] The network device 1120 may include a memory 1124. The memory 1124 may be a non-transitory computer-readable storage medium that stores instructions 1126 (which may include, for example, instructions executed by the processor 1122). The instructions 1126 may also be referred to as program code or a computer program. The memory 1124 may also store data used by the processor 1122 and results calculated by the processor.

[0100] The network device 1120 may include one or more transceivers 1128, which may include RF transmitter and / or receiver circuits that use an antenna 1130 of the network device 1120 to facilitate signaling (e.g., signaling 1140) to and / or from the network device 1120 with other devices (e.g., wireless device 1102) in accordance with a corresponding RAT.

[0101] The network device 1120 may include one or more antennas 1130 (e.g., one, two, four, or more). In embodiments with multiple antennas 1130, the network device 1120 may perform MIMO, digital beamforming, analog beamforming, beam steering, etc. as described.

[0102] The network device 1120 may include one or more interfaces 1132. The interface 1132 may be used to provide input to or output from the network device 1120. For example, the network device 1120 as a base station may include an interface 1132 composed of a transmitter, a receiver, and other circuits (e.g., in addition to the transceiver 1128 / antenna 1130 described above), which enables the base station to communicate with other equipment in the core network and / or enables the base station to communicate with an external network, computer, database, etc., in order to achieve the purpose of performing operations, management, and maintenance of the base station or other equipment operably connected to the base station.

[0103] The network device 1120 may include one or more C-DRX coordination modules 1134. The C-DRX coordination module 1134 may be implemented via hardware, software, or a combination thereof. For example, the C-DRX coordination module 1134 may be implemented as a processor, circuit, and / or instructions 1126 stored in the memory 1124 and executed by the processor 1122. In some examples, the C-DRX coordination module 1134 may be integrated within the processor 1122 and / or the transceiver 1128. For example, the C-DRX coordination module 1134 may be implemented by a combination of software components (e.g., executed by a DSP or a general purpose processor) and hardware components (e.g., logic gates and circuits) within the processor 1122 or the transceiver 1128.

[0104] The C-DRX coordination module 1134 may be used in various aspects of the present disclosure, for example, Figures 1 to 9Aspects of the present invention. The C-DRX coordination module 1134 may, for example, be configured to receive requested C-DRX parameters from another device (e.g., wireless device 1102) and consider the requested C-DRX parameters when configuring a C-DRX mode for the other device. Alternatively, the C-DRX coordination module 1134 may be configured to, for example, receive a configuration of a C-DRX mode in which another device (e.g., wireless device 1102) operates with another network and consider the configuration of the C-DRX mode with the other network when configuring the C-DRX mode with the other device.

[0105] For one or more embodiments, at least one of the components set forth in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, and / or methods as described herein. For example, a baseband processor as described herein in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein. For another example, circuits associated with a UE, a base station, a network element, etc. as described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples set forth herein.

[0106] Unless otherwise expressly stated, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. In view of the above teachings, modifications and variations are possible or can be obtained from the practice of various embodiments.

[0107] Embodiments and implementations of the systems and methods described herein may include various operations that may be embodied in machine executable instructions to be executed by a computer system. A computer system may include one or more general or special purpose computers (or other electronic devices). A computer system may include hardware components that include specific logic components for performing operations; or may include a combination of hardware, software, and / or firmware.

[0108] It should be appreciated that the systems described herein include descriptions of specific embodiments. These embodiments may be combined into a single system, partially combined into other systems, separated into multiple systems, or otherwise divided or combined. In addition, it is contemplated that parameters, attributes, aspects, etc. of another embodiment may be used in one embodiment. For clarity, these parameters, attributes, aspects, etc. are described only in one or more embodiments, and it should be appreciated that these parameters, attributes, aspects, etc. may be combined with or substituted for parameters, attributes, aspects, etc. of another embodiment unless expressly stated herein.

[0109] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0110] Although the foregoing has been described in considerable detail for the sake of clarity, it will be apparent that certain changes and modifications may be made without departing from the principles of the invention. It should be noted that there are many alternative ways to implement both the processes and the apparatus described herein. Therefore, the embodiments of the present invention should be regarded as illustrative rather than restrictive, and the specification is not limited to the details given herein, but may be modified within the scope and equivalents of the appended claims.

Claims

1. A user equipment (UE), the user equipment (UE) comprising: at least one wireless transceiver; and A processor, the processor being configured to: determining to operate in a first C-DRX mode with the first network and in a second C-DRX mode with the second network; and UE assistance information is sent to a first base station of the first network via a wireless transceiver of the at least one wireless transceiver, the UE assistance information comprising a requested C-DRX offset for the first C-DRX mode.

2. The UE according to claim 1, wherein the requested C-DRX offset comprises at least one of a long cycle DRX start offset or a DRX slot offset.

3. The UE according to claim 1, wherein: The processor is configured to: maintaining, via the wireless transceiver, a first RRC_CONNECTED state with the first network; While maintaining the first RRC_CONNECTED state, maintaining a second RRC_CONNECTED state with the second network; as well as Determining to operate in the first C-DRX mode and the second C-DRX mode while maintaining the first RRC_CONNECTED state and the second RRC_CONNECTED state.

4. The UE according to claim 3, wherein: The processor is configured to maintain the second RRC_CONNECTED state with the second network via the wireless transceiver; as well as The requested C-DRX offset for the first C-DRX mode is requested to stagger a first C-DRX On time of the first C-DRX mode with a second C-DRX On time of the second C-DRX mode.

5. The UE according to claim 3, wherein: The wireless transceiver is a first wireless transceiver; The processor is configured to maintain the second RRC_CONNECTED state with the second network via a second wireless transceiver of the at least one wireless transceiver; as well as The requested C-DRX offset for the first C-DRX mode is requested to overlap a first C-DRX On time of the first C-DRX mode with a second C-DRX On time of the second C-DRX mode. 6 . The UE of claim 5 , wherein the requested C-DRX offset for the first C-DRX mode is requested to align the first C-DRX on time with the second C-DRX on time.

7. The UE according to claim 1, wherein: The processor is configured to: determining that the requested C-DRX offset for the first C-DRX mode is not granted; and Second UE assistance information is sent to a second base station of the second network, where the second UE assistance information includes a second requested C-DRX offset for the second C-DRX mode.

8. The UE according to claim 1, wherein: The processor is configured to: determining a band combination to be used for communicating with the first network and the second network in the first C-DRX mode and the second C-DRX mode; as well as The requested C-DRX offset is determined based at least in part on whether the same radio receiver or a different radio receiver of the at least one radio receiver is to be used for the band combination.

9. The UE according to claim 1, wherein: The processor is configured to: determining a first time domain duplex (TDD) configuration of the first network and a second TDD configuration of the second network; and The requested C-DRX offset is determined based at least in part on the first TDD and the second TDD.

10. The UE according to claim 1, wherein: The processor is configured to: determining a first expected traffic flow with the first network and a second expected traffic flow with the second network; as well as The requested C-DRX offset is determined based at least in part on the first expected traffic flow and the second expected traffic flow.

11. The UE of claim 1, wherein the processor is configured to send a requested upper boundary of an inactivity timer for the first C-DRX mode to the first base station and in the UE assistance information.

12. The UE of claim 1, wherein the requested C-DRX offset for the first C-DRX mode is indicated by an index into a codebook of C-DRX offset values.

13. A user equipment (UE), the user equipment (UE) comprising: at least one wireless transceiver; and A processor, the processor being configured to: determining to operate in a first C-DRX mode with the first network and in a second C-DRX mode with the second network; sending, via a wireless transceiver of the at least one wireless transceiver, UE assistance information to a first base station of the first network, the UE assistance information comprising a C-DRX configuration of the second C-DRX mode; as well as A C-DRX configuration for the first C-DRX mode is received from the first base station and via the wireless transceiver.

14. The UE of claim 13, wherein the processor is configured to include in the UE assistance information an indication of whether one or more than one of the at least one radio transceivers can be allocated for communication with the first network when the UE operates in the first C-DRX mode.

15. The UE of claim 13, wherein the processor is configured to include an indication of a time domain duplex (TDD) configuration of the second network in the UE assistance information.

16. The UE of claim 13, wherein the processor is configured to include in the UE assistance information an indication of an expected traffic flow with the second network.

17. The UE of claim 13, wherein the processor is configured to include in the UE assistance information an indication of whether the first network and the second network are synchronized.

18. The UE according to claim 17, wherein the indication comprises at least one of the following: a system frame number (SFN) offset between the first network and the second network; or A time slot offset between the first network and the second network.

19. A method of a user equipment (UE), the method comprising: Maintaining a first RRC_CONNECTED state with the first network; While maintaining the first RRC_CONNECTED state, maintaining a second RRC_CONNECTED state with a second network; while maintaining the first RRC_CONNECTED state and the second RRC_CONNECTED state, determining to operate in a first C-DRX mode with the first network and in a second C-DRX mode with the second network; as well as Sending UE assistance information to the first network and for the first C-DRX mode, the UE assistance information comprising a set of requested C-DRX parameters including a requested C-DRX offset.

20. The method of claim 19, wherein the set of requested C-DRX parameters: staggering a first C-DRX On time of the first C-DRX mode with a second C-DRX On time of the second C-DRX mode; or The first C-DRX on time is overlapped with the second C-DRX on time.

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