Handling MBS timer and timer for steering of roaming connected mode in deregistered state in mobile communications
The proposed methods in UE enhance handling of MBS timers and Tsor-cm in deregistered states by determining conditions and executing appropriate actions, improving network registration efficiency and reducing delays.
Patent Information
- Application Number
- PCT/CN2025/075234
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-13
- Filing Date
- 2025-01-26
- Publication Date
- 2025-08-07
AI Technical Summary
Current wireless communication technologies do not adequately address the handling of multicast-broadcast services (MBS) timer and timer for steering of roaming connected mode (Tsor-cm) in a deregistered state, leading to delayed periodic public land mobile network searches and undefined UE behavior when the MBS back-off timer is running.
Implement methods in user equipment (UE) to determine specific conditions such as ongoing mobility registration update procedures, UE-initiated deregistration requirements, or timer expiry, and execute actions like aborting registration procedures or initiating deregistration processes to manage MBS timers and Tsor-cm in a deregistered state.
Enhances UE behavior clarity and reduces delays in network registration processes by providing defined actions for handling MBS timers and Tsor-cm, ensuring efficient network re-entry and minimizing downtime.
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Figure CN2025075234_07082025_PF_FP_ABST
Abstract
Description
HANDLING MBS TIMER AND TIMER FOR STEERING OF ROAMING CONNECTED MODE IN DEREGISTERED STATE IN MOBILE COMMUNICATIONSCROSS REFERENCE TO RELATED PATENT APPLICATION (S)
[0001] The present disclosure claims the priority benefit of Indian Patent Application No. 202421005772, filed 29 January 2024, and Indian Patent Application No. 202421018150, filed 13 March 2024, the contents of which herein being incorporated by reference in their entirety.TECHNICAL FIELD
[0002] The present disclosure is generally related to mobile communications and, more particularly, to handling a multicast-broadcast services (MBS) timer and a timer for steering of roaming connected mode (Tsor-cm) in a deregistered state in mobile communications.BACKGROUND
[0003] In wireless communications such as mobile communications under the current 3rd Generation Partnership Project (3GPP) specification, steering of roaming connected mode control information (SOR-CMCI) consists of SOR-CMCI rules. Each SOR-CMCI rule includes certain parameters such as: (i) a criterion of one of a plurality of types (e.g., protocol data unit (PDU) session attribute type criterion, service type criterion, SOR security check criterion, or match-all type criterion) ; and (ii) a value for Tsor-cm timer associated with each criterion listed in (i) above indicating the time that a user equipment (UE) shall wait before releasing PDU sessions or services and entering an idle mode. The Tsor-cm timer is applicable only if the UE is in an automatic network selection mode. During an SOR procedure and while applying SOR-CMCI, the UE is to determine the time to release the PDU session (s) or services. When the Tsor-cm timer expires or is stopped during a mobility registration update (MRU) , a UE-initiated deregistration is required. When the UE-initiated deregistration is required due to expiry or stoppage of the Tsor-cm timer during an MRU, the UE would wait till a successful completion of the registration procedure for mobility and a periodic registration update.
[0004] Moreover, if a PDU SESSION MODIFICATION COMMAND message includes the Received MBS container information element (IE) , for each of the Received MBS information if a received Rejection cause is set to "multicast MBS session has not started or will not start soon" and an MBS back-off timer value is included with value that indicates neither zero nor deactivated, the UE is to start a back-off timer T3587 with the value provided in the MBS back-off timer value for the received temporary mobile group identity (TMGI) . Moreover, the UE is not to attempt to join the multicast MBS session with the same TMGI, the Source Internet Protocol (IP) address information of the TMGI, or the Destination IP address information of the TMGI until the expiry of T3587.
[0005] Furthermore, if a PDU SESSION ESTABLISHMENT ACCEPT message includes the Received MBS container IE, for each of the Received MBS information if the Rejection cause is set to "multicast MBS session has not started or will not start soon" and an MBS back-off timer value is included with value that indicates neither zero nor deactivated, the UE is to start a back-off timer T3587 with the value provided in the MBS back-off timer value for the received TMGI. Also, the UE is not to attempt to join the multicast MBS session with the same TMGI until the expiry of T3587.
[0006] However, a periodic public land mobile network (PLMN) search would be delayed. Besides, the UE behavior is not defined when the MBS back-off timer T3587 is running and the UE is switched off or the UE is deregistered or an associated PDU is released. Therefore, there is a need for a solution of handling MBS timer and Tsor-cm in a deregistered state in mobile communications.SUMMARY
[0007] The following summary is illustrative only and is not intended to be limiting in any way. That is, the following summary is provided to introduce concepts, highlights, benefits, and advantages of the novel and non-obvious techniques described herein. Select implementations are further described below in the detailed description. Thus, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter.
[0008] An objective of the present disclosure is to propose solutions or schemes that address the issue (s) described herein. More specifically, various schemes proposed in the present disclosure are believed to provide solutions pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications. It is believed that implementations of one or more of the schemes proposed herein may address or otherwise alleviate the issues described above.
[0009] In one aspect, a method may involve a UE determining an occurrence of one or more conditions. The method may also involve the UE executing, in response to the determining, one or more actions. The one or more conditions may include at least one of the following: (1) an MRU procedure being ongoing; (2) a UE-initiated deregistration procedure being required or triggered; and (3) a deregistration procedure being required or triggered due to expiry or stoppage of timer Tsor-cm. The one or more actions may include at least one of the following: (a) aborting a registration procedure for mobility and a periodic registration update; and (b) performing the UE-initiated deregistration procedure.
[0010] In another aspect, a method may involve a UE determining an occurrence of one or more conditions. The method may also involve the UE executing, in response to the determining, one or more actions. The one or more conditions may include at least one of the following: (1) an MRU procedure being ongoing; (2) a UE-initiated deregistration procedure being required or triggered; and (3) a deregistration procedure being not required or triggered due to expiry or stoppage of timer Tsor-cm. The one or more actions may include at least one of the following: (a) performing a registration procedure for mobility and a periodic registration update; and (b) initiating the UE-initiated deregistration procedure after a successful completion of the registration procedure for mobility and the periodic registration update.
[0011] It is noteworthy that, although the description provided herein may be in the context of certain radio access technologies, networks, and network topologies such as 5th Generation (5G) / New Radio (NR) / Beyond Fifth-Generation (B5G) mobile communications, the proposed concepts, schemes and any variation (s) / derivative (s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies such as, for example and without limitation, 4th Generation (4G) / Long-Term Evolution (LTE) , LTE-Advanced, LTE-Advanced Pro, Internet-of-Things (IoT) , Narrow Band Internet of Things (NB-IoT) , Industrial Internet of Things (IIoT) , vehicle-to-everything (V2X) , and non-terrestrial network (NTN) communications. Thus, the scope of the present disclosure is not limited to the examples described herein.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of the present disclosure. The drawings illustrate implementations of the disclosure and, together with the description, serve to explain the principles of the disclosure. It is appreciable that the drawings are not necessarily in scale as some components may be shown to be out of proportion than the size in actual implementation in order to clearly illustrate the concept of the present disclosure.
[0013] FIG. 1 is a diagram of an example network environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
[0014] FIG. 2 is a block diagram of an example communication system under a proposed scheme in accordance with the present disclosure.
[0015] FIG. 3 is a flowchart of a second example process under a proposed scheme in accordance with the present disclosure.
[0016] FIG. 4 is a flowchart of a second example process under a proposed scheme in accordance with the present disclosure.
[0017] FIG. 5 is a flowchart of a second example process under a proposed scheme in accordance with the present disclosure. DETAILED DESCRIPTION OF PREFERRED IMPLEMENTATIONS
[0018] Detailed embodiments and implementations of the claimed subject matters are disclosed herein. However, it shall be understood that the disclosed embodiments and implementations are merely illustrative of the claimed subject matters which may be embodied in various forms. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that description of the present disclosure is thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. In the description below, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations. Overview
[0019] Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and / or solutions pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications. According to the present disclosure, a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
[0020] FIG. 1 illustrates an example network environment 100 in which various solutions and schemes in accordance with the present disclosure may be implemented. FIG. 2 ~ FIG. 5 illustrate examples of implementation of various proposed schemes in network environment 100 in accordance with the present disclosure. The following description of various proposed schemes is provided with reference to FIG. 1 ~ FIG. 5.
[0021] Referring to FIG. 1, network environment 100 may involve a UE 110, such as a mobile device or smartphone, in wireless communication with a wireless network 120 as part of a communication network. The wireless network 120 may be one or more public land mobile networks (PLMNs) including 5G / NR domain, 4G / LTE domain, and 2nd Generation / 3rd Generation (2G / 3G) domain. UE 110 may initially be in wireless communication with wireless network 120 via a base station or network node 125 (e.g., an eNB, gNB or transmit-receive point (TRP) ) . In network environment 100, UE 110 and the wireless network 120 may implement various schemes pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications in accordance with the present disclosure, as described herein.
[0022] It is noteworthy that, while the various proposed schemes may be individually or separately described below, in actual implementations some or all of the proposed schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed schemes may be utilized or otherwise implemented individually or separately. Moreover, as used herein, a lower layer may refer to a layer in the 5GMM protocol stack that is lower than the radio resource control (RRC) layer, such as a packet data convergence protocol (PDCP) layer, a radio control link (RLC) layer, a medium access control (MAC) layer, a physical (PHY) layer, or so forth.
[0023] As an abnormal case of MRU, a UE-initiated deregistration may be required due to removal of a Universal Subscriber Identity Module (USIM) or entry update in a “list of subscriber data” or due to switch-off of the UE. The registration procedure for mobility and periodic registration update may be aborted, and the UE-initiated deregistration procedure may be performed. When deregistration is not due to removal of USIM or entry update in the “list of subscriber data” and not due to switch-off of the UE, the UE-initiated deregistration procedure may be initiated after the successful completion of the registration procedure for mobility and periodic registration update.
[0024] Under a proposed scheme in accordance with the present disclosure, in response to determining an occurrence of one or more conditions, UE 110 may execute one or more actions. The one or more conditions may include at least one of the following: (1) an MRU procedure being ongoing; (2) a UE-initiated deregistration procedure being required or triggered; and (3) a deregistration procedure being required or triggered due to expiry or stoppage of timer Tsor-cm. The one or more actions may include at least one of the following: (a) aborting a registration procedure for mobility and a periodic registration update; and (b) performing the UE-initiated deregistration procedure.
[0025] Under another proposed scheme in accordance with the present disclosure, in response to determining an occurrence of one or more conditions, UE 110 may execute one or more actions. The one or more conditions may include at least one of the following: (1) an MRU procedure being ongoing; (2) a UE-initiated deregistration procedure being required or triggered; and (3) a deregistration procedure being not required or triggered due to expiry or stoppage of timer Tsor-cm. The one or more actions may include at least one of the following: (a) performing a registration procedure for mobility and a periodic registration update; and (b) initiating the UE-initiated deregistration procedure after a successful completion of the registration procedure for mobility and the periodic registration update.
[0026] Under yet another proposed scheme in accordance with the present disclosure, in response to determining an occurrence of one or more conditions, UE 110 may execute one or more actions. The one or more conditions may include at least one of the following: (1) an MBS back-off timer (e.g., T3587) being running; (2) UE 110 being switched off; (3) UE 110 entering a deregistered state; and (4) an associated PDU being released. The one or more actions may include at least one of the following: (a) keeping the MBS back-off timer running; and (b) saving a remaining timeout period of the MBS back-off timer at switch-off of UE 110. In some implementations, in saving the remaining timeout period of the MBS back-off timer, UE may allow time elapse between the switch-off and switch-on of the UE as the MBS back-off timer is running. In some implementations, UE 110 may start the MBS back-off timer with a value of t1 –t responsive to t1 being greater than t. Alternatively, UE 110 may not restart the MBS back-off timer responsive to t1 being equal to or less than t. Here, t1 may denote an amount of time remaining for the MBS back-off timer to reach timeout at the switch-off of UE 110, and t denotes an amount of time elapsed between the switch-off and the switch-on of UE 110.
[0027] As an implementation example, if a deregistration procedure is triggered due to removal of a USIM or entry update in the “list of subscriber data” , due to switch-off of UE 110, or due to a last running Tsor-cm timer having expired or being stopped, the registration procedure for mobility and periodic registration update may be aborted. Additionally, a UE initiated deregistration procedure may be performed. Moreover, UE 110 may populate a 5th Generation System (5GS) mobile identity information element (IE) in a DEREGISTRATION REQUEST message with the same UE identity as used in a REGISTRATION REQUEST message for an aborted mobility and periodic registration update procedure. Otherwise, the UE-initiated deregistration procedure may be initiated after a successful completion of the registration procedure for mobility and periodic registration update.
[0028] As another implementation example, if UE 110 is switched off when the MBS back-off timer T3587 is running, UE 110 may behave as described below when UE 110 is switched on and the USIM in UE 110 remains the same. That is, UE 110 may let t1 be the time remaining for the MBS back-off timer T3587 timeout at switch off and let t be the time elapsed between switch off and switch on. If t1 is greater than t, then the timer is to be restarted with the value t1 –t. If t1 is equal to or less than t, then the timer is not to be restarted. Illustrative Implementations
[0029] FIG. 2 illustrates an example communication system 200 having at least an example apparatus 210 and an example apparatus 220 in accordance with an implementation of the present disclosure. Each of apparatus 210 and apparatus 220 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications, including the various schemes described above with respect to various proposed designs, concepts, schemes, systems and methods described above, including network environment 100, as well as processes described below.
[0030] Each of apparatus 210 and apparatus 220 may be a part of an electronic apparatus, which may be a network apparatus or a UE (e.g., UE 110) , such as a portable or mobile apparatus, a wearable apparatus, a vehicular device or a vehicle, a wireless communication apparatus or a computing apparatus. For instance, each of apparatus 210 and apparatus 220 may be implemented in a smartphone, a smart watch, a personal digital assistant, an electronic control unit (ECU) in a vehicle, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer. Each of apparatus 210 and apparatus 220 may also be a part of a machine type apparatus, which may be an IoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a roadside unit (RSU) , a wire communication apparatus or a computing apparatus. For instance, each of apparatus 210 and apparatus 220 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center. When implemented in or as a network apparatus, apparatus 210 and / or apparatus 220 may be implemented in an eNodeB in an LTE, LTE-Advanced or LTE-Advanced Pro network or in a gNB or TRP in a 5G network, an NR network, or an IoT network.
[0031] In some implementations, each of apparatus 210 and apparatus 220 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more complex-instruction-set-computing (CISC) processors, or one or more reduced-instruction-set-computing (RISC) processors. In the various schemes described above, each of apparatus 210 and apparatus 220 may be implemented in or as a network apparatus or a UE. Each of apparatus 210 and apparatus 220 may include at least some of those components shown in FIG. 2 such as a processor 212 and a processor 222, respectively, for example. Each of apparatus 210 and apparatus 220 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and / or user interface device) , and, thus, such component (s) of apparatus 210 and apparatus 220 are neither shown in FIG. 2 nor described below in the interest of simplicity and brevity.
[0032] In one aspect, each of processor 212 and processor 222 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC or RISC processors. That is, even though a singular term “a processor” is used herein to refer to processor 212 and processor 222, each of processor 212 and processor 222 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure. In another aspect, each of processor 212 and processor 222 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and / or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure. In other words, in at least some implementations, each of processor 212 and processor 222 is a special-purpose machine specifically designed, arranged, and configured to perform specific tasks including those pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications in accordance with various implementations of the present disclosure.
[0033] In some implementations, apparatus 210 may also include a transceiver 216 coupled to processor 212. Transceiver 216 may be capable of wirelessly transmitting and receiving data. In some implementations, transceiver 216 may be capable of wirelessly communicating with different types of wireless networks of different radio access technologies (RATs) . In some implementations, transceiver 216 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 216 may be equipped with multiple transmit antennas and multiple receive antennas for multiple-input multiple-output (MIMO) wireless communications. In some implementations, apparatus 220 may also include a transceiver 226 coupled to processor 222. Transceiver 226 may include a transceiver capable of wirelessly transmitting and receiving data. In some implementations, transceiver 226 may be capable of wirelessly communicating with different types of UEs / wireless networks of different RATs. In some implementations, transceiver 226 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 226 may be equipped with multiple transmit antennas and multiple receive antennas for MIMO wireless communications.
[0034] In some implementations, apparatus 210 may further include a memory 214 coupled to processor 212 and capable of being accessed by processor 212 and storing data therein. In some implementations, apparatus 220 may further include a memory 224 coupled to processor 222 and capable of being accessed by processor 222 and storing data therein. Each of memory 214 and memory 224 may include a type of random-access memory (RAM) such as dynamic RAM (DRAM) , static RAM (SRAM) , thyristor RAM (T-RAM) and / or zero-capacitor RAM (Z-RAM) . Alternatively, or additionally, each of memory 214 and memory 224 may include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM) , erasable programmable ROM (EPROM) and / or electrically erasable programmable ROM (EEPROM) . Alternatively, or additionally, each of memory 214 and memory 224 may include a type of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory, ferroelectric RAM (FeRAM) , magnetoresistive RAM (MRAM) and / or phase-change memory.
[0035] Each of apparatus 210 and apparatus 220 may be a communication entity capable of communicating with each other using various proposed schemes in accordance with the present disclosure. For illustrative purposes and without limitation, a description of capabilities of apparatus 210, as a UE (e.g., UE 110) , and apparatus 220, as a network node (e.g., network node 125) of a network (e.g., wireless network 120 as a 5G / NR mobile network) , is provided below in the context of example processes 300 and 400. Illustrative Processes
[0036] FIG. 3 illustrates an example process 300 in accordance with an implementation of the present disclosure. Process 300 may represent an aspect of implementing various proposed designs, concepts, schemes, systems and methods described above. More specifically, process 300 may represent an aspect of the proposed concepts and schemes pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications in accordance with the present disclosure. Process 300 may include one or more operations, actions, or functions as illustrated by one or more of blocks 310 and 320. Although illustrated as discrete blocks, various blocks of process 300 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks / sub-blocks of process 300 may be executed in the order shown in FIG. 3 or, alternatively, in a different order. Furthermore, one or more of the blocks / sub-blocks of process 300 may be executed repeatedly or iteratively. Process 300 may be implemented by or in apparatus 210 and apparatus 220 as well as any variations thereof. Solely for illustrative purposes and without limiting the scope, process 300 is described below in the context of apparatus 210 as a UE (e.g., UE 110) and apparatus 220 as a communication entity such as a network node or base station (e.g., network node 125) of a network (e.g., wireless network 120) . Process 300 may begin at block 310.
[0037] At 310, process 300 may involve processor 212 of apparatus 210, as UE 110, determining an occurrence of one or more conditions. Process 300 may proceed from 310 to 320.
[0038] At 320, process 300 may involve processor 212 executing, in response to the determining, one or more actions.
[0039] In some implementations, the one or more conditions may include at least one of the following: (1) an MRU procedure being ongoing; (2) a UE-initiated deregistration procedure being required or triggered; and (3) a deregistration procedure being required or triggered due to expiry or stoppage of timer Tsor-cm. The one or more actions may include at least one of the following: (a) aborting a registration procedure for mobility and a periodic registration update; and (b) performing the UE-initiated deregistration procedure.
[0040] FIG. 4 illustrates an example process 400 in accordance with an implementation of the present disclosure. Process 400 may represent an aspect of implementing various proposed designs, concepts, schemes, systems and methods described above. More specifically, process 400 may represent an aspect of the proposed concepts and schemes pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications in accordance with the present disclosure. Process 400 may include one or more operations, actions, or functions as illustrated by one or more of blocks 410 and 420. Although illustrated as discrete blocks, various blocks of process 400 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks / sub-blocks of process 400 may be executed in the order shown in FIG. 4 or, alternatively, in a different order. Furthermore, one or more of the blocks / sub-blocks of process 400 may be executed repeatedly or iteratively. Process 400 may be implemented by or in apparatus 210 and apparatus 220 as well as any variations thereof. Solely for illustrative purposes and without limiting the scope, process 400 is described below in the context of apparatus 210 as a UE (e.g., UE 110) and apparatus 220 as a communication entity such as a network node or base station (e.g., network node 125) of a network (e.g., wireless network 120) . Process 400 may begin at block 410.
[0041] At 410, process 400 may involve processor 212 of apparatus 210, as UE 110, determining an occurrence of one or more conditions. Process 400 may proceed from 410 to 420.
[0042] At 420, process 400 may involve processor 212 executing, in response to the determining, one or more actions.
[0043] In some implementations, the one or more conditions may include at least one of the following: (1) an MRU procedure being ongoing; (2) a UE-initiated deregistration procedure being required or triggered; and (3) a deregistration procedure being not required or triggered due to expiry or stoppage of timer Tsor-cm. The one or more actions may include at least one of the following: (a) performing a registration procedure for mobility and a periodic registration update; and (b) initiating the UE-initiated deregistration procedure after a successful completion of the registration procedure for mobility and the periodic registration update.
[0044] FIG. 5 illustrates an example process 500 in accordance with an implementation of the present disclosure. Process 500 may represent an aspect of implementing various proposed designs, concepts, schemes, systems and methods described above. More specifically, process 500 may represent an aspect of the proposed concepts and schemes pertaining to handling MBS timer and Tsor-cm in a deregistered state in mobile communications in accordance with the present disclosure. Process 500 may include one or more operations, actions, or functions as illustrated by one or more of blocks 510 and 520. Although illustrated as discrete blocks, various blocks of process 500 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks / sub-blocks of process 500 may be executed in the order shown in FIG. 5 or, alternatively, in a different order. Furthermore, one or more of the blocks / sub-blocks of process 500 may be executed repeatedly or iteratively. Process 500 may be implemented by or in apparatus 210 and apparatus 220 as well as any variations thereof. Solely for illustrative purposes and without limiting the scope, process 500 is described below in the context of apparatus 210 as a UE (e.g., UE 110) and apparatus 220 as a communication entity such as a network node or base station (e.g., network node 125) of a network (e.g., wireless network 120) . Process 500 may begin at block 510.
[0045] At 510, process 500 may involve processor 212 of apparatus 210, as UE 110, determining an occurrence of one or more conditions. Process 500 may proceed from 510 to 520.
[0046] At 520, process 500 may involve processor 212 executing, in response to the determining, one or more actions.
[0047] In some implementations, the one or more conditions may include at least one of the following: (1) an MBS back-off timer (e.g., T3587) being running; (2) apparatus 210 being switched off; (3) apparatus 210 entering a deregistered state; and (4) an associated PDU being released. The one or more actions may include at least one of the following: (a) keeping the MBS back-off timer running; and (b) saving a remaining timeout period of the MBS back-off timer at switch-off of apparatus 210.
[0048] In some implementations, in saving the remaining timeout period of the MBS back-off timer, process 500 may involve processor 212 allowing time elapse between the switch-off and switch-on of the UE as the MBS back-off timer is running.
[0049] In some implementations, process 500 may further involve processor 212 performing additional operations. For instance, process 500 may involve processor 212 restarting the MBS back-off timer with a value of t1 –t responsive to t1 being greater than t. Alternatively, process 500 may involve processor 212 not restarting the MBS back-off timer responsive to t1 being equal to or less than t. Here, t1 may denote an amount of time remaining for the MBS back-off timer to reach timeout at the switch-off of apparatus 210, and t denotes an amount of time elapsed between the switch-off and the switch-on of apparatus 210. Additional Notes
[0050] The herein-described subject matter sometimes illustrates different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely examples, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively "associated" such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as "associated with" each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being "operably connected" , or "operably coupled" , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being "operably couplable" , to each other to achieve the desired functionality. Specific examples of operably couplable include but are not limited to physically mateable and / or physically interacting components and / or wirelessly interactable and / or wirelessly interacting components and / or logically interacting and / or logically interactable components.
[0051] Further, with respect to the use of substantially any plural and / or singular terms herein, those having skill in the art can translate from the plural to the singular and / or from the singular to the plural as is appropriate to the context and / or application. The various singular / plural permutations may be expressly set forth herein for sake of clarity.
[0052] Moreover, it will be understood by those skilled in the art that, in general, terms used herein, and especially in the appended claims, e.g., bodies of the appended claims, are generally intended as “open” terms, e.g., the term “including” should be interpreted as “including but not limited to, ” the term “having” should be interpreted as “having at least, ” the term “includes” should be interpreted as “includes but is not limited to, ” etc. It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to implementations containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an, " e.g., “a” and / or “an” should be interpreted to mean “at least one” or “one or more; ” the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should be interpreted to mean at least the recited number, e.g., the bare recitation of "two recitations, " without other modifiers, means at least two recitations, or two or more recitations. Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. In those instances where a convention analogous to “at least one of A, B, or C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. It will be further understood by those within the art that virtually any disjunctive word and / or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B. ”
[0053] From the foregoing, it will be appreciated that various implementations of the present disclosure have been described herein for purposes of illustration, and that various modifications may be made without departing from the scope and spirit of the present disclosure. Accordingly, the various implementations disclosed herein are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Claims
1.A method, comprising:determining, by a processor of a user equipment (UE) , an occurrence of one or more conditions; andexecuting, by the processor responsive to the determining, one or more actions,wherein the one or more conditions comprise at least one of:a mobility registration update (MRU) procedure being ongoing;a UE-initiated deregistration procedure being required or triggered; anda deregistration procedure being required or triggered due to expiry or stoppage of a timer for steering of roaming connected mode (Tsor-cm) , andwherein the one or more actions comprise at least one of:aborting a registration procedure for mobility and a periodic registration update; andperforming the UE-initiated deregistration procedure.2.A method, comprising:determining, by a processor of a user equipment (UE) , an occurrence of one or more conditions; andexecuting, by the processor responsive to the determining, one or more actions,wherein the one or more conditions comprise at least one of:a mobility registration update (MRU) procedure being ongoing;a UE-initiated deregistration procedure being required or triggered; anda deregistration procedure being not required or triggered due to expiry or stoppage of a timer for steering of roaming connected mode (Tsor-cm) , andwherein the one or more actions comprise at least one of:performing a registration procedure for mobility and a periodic registration update; andinitiating the UE-initiated deregistration procedure after a successful completion of the registration procedure for mobility and the periodic registration update.3.A method, comprising:determining, by a processor of a user equipment (UE) , an occurrence of one or more conditions; andexecuting, by the processor responsive to the determining, one or more actions,wherein the one or more conditions comprise at least one of:a multicast-broadcast services (MBS) back-off timer being running;the UE being switched off;the UE entering a deregistered state; andan associated protocol data unit (PDU) being released, andwherein the one or more actions comprise at least one of:keeping the MBS back-off timer running; andsaving a remaining timeout period of the MBS back-off timer at switch-off of the UE.4.The method of Claim 3, wherein the saving of the remaining timeout period of the MBS back-off timer comprises allowing time elapse between the switch-off and switch-on of the UE as the MBS back-off timer is running.5.The method of Claim 4, further comprising:restarting the MBS back-off timer with a value of t1 –t responsive to t1 being greater than t; ornot restarting the MBS back-off timer responsive to t1 being equal to or less than t,wherein t1 denotes an amount of time remaining for the MBS back-off timer to reach timeout at the switch-off of the UE, andwherein t denotes an amount of time elapsed between the switch-off and the switch-on of the UE.
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