Method and apparatus for handling running mobility management timer in mobile communications
The proposed schemes for restarting mobility management timers to their initial value address undefined UE behavior in the 3GPP standard, ensuring consistent timer management during eCall or call establishment, thereby maintaining proper functionality.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MEDIATEK SINGAPORE PTE LTD
- Filing Date
- 2025-11-07
- Publication Date
- 2026-06-04
Smart Images

Figure CN2025133331_04062026_PF_FP_ABST
Abstract
Description
METHOD AND APPARATUS FOR HANDLING RUNNING MOBILITY MANAGEMENT TIMER IN MOBILE COMMUNICATIONSCROSS REFERENCE TO RELATED PATENT APPLICATION (S)
[0001] The present disclosure is part of a non-provisional application claiming the priority benefit of IN Application No. 202421093304, filed 28 November 2024, and IN Application No. 202521009864, filed 06 February 2025, the content 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 the management of running mobility management timers in mobile communications.BACKGROUND
[0003] Unless otherwise indicated herein, approaches described in this section are not prior art to the claims listed below and are not admitted as prior art by inclusion in this section.
[0004] In the 3rd Generation Partnership Project (3GPP) standard, some mechanisms of operating non-access-stratum (NAS) timers (e.g., mobility management timers T3444, T3445, etc. ) are designed for fundamental purposes. However, the specification lacks a clear mechanism for handling the NAS timers if the UE initiates a call while the NAS timers are still running.
[0005] Therefore, there is a need to provide proper schemes and designs to address this issue.SUMMARY
[0006] 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.
[0007] An objective of the present disclosure is to propose solutions or schemes that address the aforementioned issue pertaining to handling running eCall timers when an eCall or a call is initiated.
[0008] In one aspect, a method may involve an apparatus maintaining a mobility management timer. The method may also involve the apparatus restarting the mobility management timer in an event that a NAS signalling connection that was released had been established for establishing an eCall or a call was released or the NAS signalling connection established for the eCall or the call moved to an MM-connected with RRC inactive indication, and the mobility management timer is still running.
[0009] In one aspect, an apparatus may comprise a transceiver which, during operation, wirelessly communicates with a wireless network. The apparatus may also comprise a processor communicatively coupled to the transceiver. The processor, during operation, may perform operations comprising maintaining a mobility management timer. The processor may also perform operations comprising restarting the mobility management timer in an event that a NAS signalling connection that was released had been established for establishing an eCall or a call was released or the NAS signalling connection established for the eCall or the call moved to an MM-connected with RRC inactive indication, and the mobility management timer is still running.
[0010] It is noteworthy that, although description provided herein may be in the context of certain radio access technologies, networks and network topologies such as LTE, LTE-Advanced, LTE-Advanced Pro, 5G, NR, Internet-of-Things (IoT) and Narrow Band Internet of Things (NB-IoT) , Industrial Internet of Things (IIoT) , beyond 5G (B5G) , and 6th Generation (6G) , 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. Thus, the scope of the present disclosure is not limited to the examples described herein.BRIEF DESCRIPTION OF THE DRAWINGS
[0011] 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.
[0012] FIG. 1 is a diagram depicting an example scenario of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
[0013] FIG. 2 is a diagram depicting an example scenario of a mobility management timer handling procedure in accordance with an implementation of the present disclosure.
[0014] FIG. 3 is a block diagram of an example communication system in accordance with an implementation of the present disclosure.
[0015] FIG. 4 is a flowchart of an example process in accordance with an implementation of the present disclosure. DETAILED DESCRIPTION OF PREFERRED IMPLEMENTATIONS
[0016] 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
[0017] Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and / or solutions pertaining to enhancements of the management of running mobility management timers handling. 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.
[0018] FIG. 1 illustrates an example scenario 100 of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented. Scenario 100 involves a UE 110 in wireless communication with either one or both of a wireless network 120 (e.g., a 5G system (5GS) including a Next Generation Node-B (gNB) 122 and a 5G Core network (5GC) 124) and a wireless network 130 (e.g., an evolved packet system (EPS) including an evolved Node-B (eNB) 132 and an evolved packet core (EPC) 134) . Interworking between the 5GC 124 and the EPC 134 may be supported through an N26 interface and / or an S5 interface, where the N26 interface connects the core network nodes, e.g., 4G’s mobility management entity (MME) and 5G’s access and mobility management function (AMF) , to allow them to coordinate the UE’s mobility management, and the S5 interface connects the core network nodes, e.g., 4G’s serving gateway (SGW) and 5G’s packet gateway (PGW) , to coordinate the UE’s data connectivity. Each of the wireless networks 120 and 130 may further connect to an internet protocol (IP) multimedia subsystem (IMS) 140, which is responsible for delivering IP multimedia services, including voice call services (e.g., voice over IP (VoIP) , voice over LTE (VoLTE) , and voice over NR (VoNR) ) and emergency services (e.g., circuit-switched (CS) emergency call, emergency bearer services, etc. ) . In such a communication environment, the UE 110 may implement various schemes pertaining to the management of running mobility management timers in accordance with the present disclosure, as described below. 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.
[0019] In current 3GPP standards, there are certain scenarios where the UE’s behavior is undefined regarding whether running mobility management timers (e.g., the NAS timers T3444 or T3445) should be stopped, reset, kept running, or restarted in an event that the UE receives a request for establishing an eCall or a call. More specifically, when an eCall over IMS is performed while timer T3444 is running due to two accidents in less than 12 hours, or a test / configuration call is performed while T3445 is running due to two test / configuration calls in less than 12 hours, and when an N1 non-access-stratum (NAS) signalling connection established for the eCall or the test / configuration call is released, then it is unclear whether the running mobility management timers should be restarted from initial value or not.
[0020] In view of the above, the present disclosure proposes various schemes for handling running mobility management timers. According to the schemes of the present disclosure, the UE may restart the running mobility management timer in an event that a request is received for establishing an eCall or a call, and the mobility management timer is still running. Accordingly, by applying the schemes of the present disclosure, the processes related to handling the running mobility management timer may be reasonably defined for the user requirement. The functionality and the design purpose of the mobility management timers can work well. Specifically, the running mobility management timer can be reset to its initial value to count the entire period of the timer value.
[0021] FIG. 2 illustrates an example scenario 200 of a mobility management timer handling procedure in accordance with an implementation of the present disclosure. Scenario 200 involves a UE 210 in wireless communication with a 5GS and / or an EPS (e.g., Network shown in FIG. 2) . The UE 210 is configured for an eCall only mode that allows the UE 210 to register at 5GC and register in IMS to perform only eCall over IMS, and a non-emergency IMS call for test and / or terminal reconfiguration services. The call may be a call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service. The procedure may proceed from step 201 to step 205.
[0022] In step 201, the UE 210 may start and maintain the mobility management timer. In some implementations of step 201, the UE 210 may start the mobility management timer in an event that the UE 210 configured for the eCall only mode enters an IDLE mode or an MM-CONNECTED mode with radio resource control (RRC) inactive indication. In some implementations, the IDLE mode may include an evolved packet system (EPS) mobility management (EMM) -IDLE mode, or a fifth-generation (5G) EMM-IDLE mode, and the MM-connected mode with RRC inactive indication may include a fifth-generation (5G) MM-CONNECTED mode with radio resource control (RRC) inactive indication. In some implementations of step 201, the UE 210 may start the mobility management timer in an event that the UE 210 configured for the eCall only mode moves from a global system for mobile communications (GSM) enhanced data rates for global evolution (EDGE) radio access network (GERAN) or a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) to an evolved UMTS radio access network (E-UTRAN) or a next generation radio access network (NG-RAN) with a T3243 timer running. In some implementations of step 201, the UE 210 may start the mobility management timer after the UE 210 initiates an eCall or a test / configuration call.
[0023] In one example, the mobility management timer is the EPS mobility management timer T3444. In one example, the mobility management timer is the EPS mobility management timer T3445. In one example, the mobility management timer continuously runs with a default time, e.g., 12 hours, after the UE 210 starts the timer.
[0024] Subsequently, in step 202, the UE 210 may receive a request for establishing an eCall or a call while the mobility management timer is still running. In some implementations of step 202, a non-access-stratum (NAS) layer of the UE 210 receives the request from an upper layer of the UE 210 for establishing the eCall over an IMS. In some implementations of step 202, the NAS layer of the UE 210 may receive the request from the upper layer of the UE 210 for establishing a test / configuration call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service. In some implementations, optionally, the UE 210 may further stop the active timer (e.g., the current running timer T3444 or T3445) in an event of receiving the request.
[0025] Subsequently, in step 203, the eCall or the call is completed (e.g., after receiving the request or the eCall or the call is finished) . In some implementations of step 203, the mobility management timer is T3444, and the eCall over IMS is completed after receiving / finishing the request for establishing the eCall. In some implementations of step 203, the mobility management timer is T3445, and the call (e.g., test / configuration call) to HPLMN designated non-emergency MSISDN or URI for test or terminal reconfiguration service is completed after receiving / finishing the request for establishing the call.
[0026] Subsequently, in step 204, responsive to the eCall or the call is completed, a non-access-stratum (NAS) signalling connection is released. In some implementations of the present disclosure, after the eCall over IMS is completed, the NAS signalling connection is released. In this scenario, the mobility management timer is T3444. In some implementations, after the call to HPLMN designated non-emergency MSISDN or URI for test or terminal reconfiguration service is completed, the NAS signalling connection is released. In this scenario, the mobility management timer is T3445.
[0027] Subsequently, in step 205, responsive to at least two conditions being met, the UE 210 restarts the mobility management timer. In some implementations of step 205, the conditions may include that the NAS signalling connection that was released had been established for establishing an eCall or a call was released, and the mobility management timer is still running. In some implementations of step 205, the conditions may include that the NAS signalling connection established for the eCall or the call moved to the MM-connected with RRC inactive indication, and the mobility management timer is still running. In some implementations of step 205, the conditions may include that the request was received, and the mobility management timer is still running. In some implementations of step 205, responsive to the NAS signalling connection being released, the UE 210 may restart the current running mobility management timer. In this case, the conditions may include the NAS signalling connection for the eCall or the call was released, and the mobility management timer is still running.
[0028] In some implementations of step 205, restarting the mobility management timer may include stopping the mobility management timer and restarting the mobility management timer with an initial value. In one example, the initial value of the present disclosure represents a default running time to the timer, e.g., 12 hours.
[0029] In some implementations of step 205, restarting the mobility management timer may include resetting the mobility management timer to an initial value and restarting the mobility management timer with the initial value after the NAS signalling connection for the eCall or the call is released.
[0030] In some implementations of step 205, restarting the mobility management timer may include stopping the mobility management timer after the request is received for establishing the eCall or the call, resetting the mobility management timer to an initial value, and restarting the mobility management timer with the initial value after the NAS signalling connection for the eCall or the call is released.
[0031] In some implementations of step 205, the UE 210 may restart the mobility management timer from the initial value in an event that the NAS signalling connection established for the eCall or the call was released, and the timer is still running. In one example, when the time interval between two accidents (i.e., two eCalls) occurs in less than default timer running time (e.g., 12 hours) and when the later eCall is performed over IMS while the timer T3444 is still running, the UE 210 may restart the timer T3444 from the initial value according to the implementations of step 205 of the present disclosure. Similarly, when time interval between two test / configuration calls is less than the default timer running time and when the later test / configuration call is performed while the timer T3445 is still running, the UE 210 may restart the timer T3445 from the initial value (e.g., the default timer running time) according to the implementations of step 205 of the present disclosure.
[0032] More specifically, in some implementations of step 205, the UE 210 may stop the current running timer T3444 and restart the timer T3444 with its initial value in an event that the NAS signalling connection that was released had been established for the eCall over IMS. In one example, the restarting of the timer T3444 may involve resetting the timer T3444 to an initial value (or an original value) and starting the timer T3444 with the initial value (or the original value) . However, the present disclosure is not limited thereto.
[0033] More specifically, in some implementations of step 205, the UE 210 may stop the current running timer T3445 and restart the timer T3445 with its initial value in an event that the NAS signalling connection that was released had been established for the call to an HPLMN designated non-emergency MSISDN or URI for test or terminal reconfiguration service. In one example, the restarting of the timer T3445 may involve resetting the timer T3445 to an initial value (or an original value) and starting the timer T3445 with the initial value (or the original value) . However, the present disclosure is not limited thereto.
[0034] In some implementations of steps 202 to 205, the UE 210 may stop the active timer and restart it with its initial value in response to receiving the request. Illustrative Processes
[0035] FIG. 3 illustrates an example communication system 300 having an example communication apparatus 310 and an example network apparatus 320 in accordance with an implementation of the present disclosure. Each of communication apparatus 310 and network apparatus 320 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to enhancements of the manamgement of running mobility management timers handling, including scenarios / schemes described above as well as process 400 described below.
[0036] Communication apparatus 310 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus. For instance, communication apparatus 310 may be implemented in a smartphone, a smartwatch, 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. Communication apparatus 310 may also be a part of a machine type apparatus, which may be an IoT, NB-IoT, IIoT, BL, or CE UE 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, communication apparatus 310 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center. Alternatively, communication apparatus 310 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 reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing (CISC) processors. Communication apparatus 310 may include at least some of those components shown in FIG. 3 such as a processor 312, for example. Communication apparatus 310 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 communication apparatus 310 are neither shown in FIG. 3 nor described below in the interest of simplicity and brevity.
[0037] Network apparatus 320 may be a part of an electronic apparatus, which may be a network node such as a BS (e.g., an eNB, a gNB, or a TRP) , a small cell, a router or a gateway of a wireless network (e.g., a 4G / 5G / B5G / 6G network) , connecting communication apparatus 310 to the core network (e.g., an EPC or a 5GC) of the wireless network. For instance, network apparatus 320 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more RISC or CISC processors. Network apparatus 320 may include at least some of those components shown in FIG. 3 such as a processor 322, for example. Network apparatus 320 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 network apparatus 320 are neither shown in FIG. 3 nor described below in the interest of simplicity and brevity.
[0038] In one aspect, each of processor 312 and processor 322 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is, even though a singular term “a processor” is used herein to refer to processor 312 and processor 322, each of processor 312 and processor 322 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 312 and processor 322 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 312 and processor 322 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks, including enhancements of running mobility management timers handling, in a UE (e.g., as represented by communication apparatus 310) and a network node (e.g., as represented by network apparatus 320) in accordance with various implementations of the present disclosure.
[0039] In some implementations, communication apparatus 310 may also include a transceiver 316 coupled to processor 312 and capable of wirelessly transmitting and receiving data. In some implementations, transceiver 316 may be capable of wirelessly communicating with different types of UEs and / or wireless networks of different RATs, e.g., 2G GSM, 3G UMTS, 4G LTE, 5G NR, and / or 6G. In some implementations, transceiver 316 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 316 may be equipped with multiple transmit antennas and multiple receive antennas for multiple-input multiple-output (MIMO) wireless communications. In some implementations, network apparatus 320 may also include a transceiver 326 coupled to processor 322. Transceiver 326 may include a transceiver capable of wirelessly transmitting and receiving data. In some implementations, transceiver 326 may be capable of wirelessly communicating with different types of UEs of different RATs. In some implementations, transceiver 326 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 326 may be equipped with multiple transmit antennas and multiple receive antennas for MIMO wireless communications.
[0040] In some implementations, communication apparatus 310 may further include a memory 314 coupled to processor 312 and capable of being accessed by processor 312 and storing data therein. In some implementations, network apparatus 320 may further include a memory 324 coupled to processor 322 and capable of being accessed by processor 322 and storing data therein. Each of memory 314 and memory 324 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 314 and memory 324 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 314 and memory 324 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.
[0041] Each of communication apparatus 310 and network apparatus 320 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 communication apparatus 310, as a UE is provided below.
[0042] Under certain proposed schemes in accordance with the present disclosure with respect to a mobility management timer handling procedure, processor 312 of communication apparatus 310 may maintain a mobility management timer. Then, processor 312 may restart the mobility management timer in an event that a NAS signalling connection that was released had been established for establishing an eCall or a call was released or the NAS signalling connection established for the eCall or the call moved to a MM-connected with RRC inactive indication, and the mobility management timer is still running. In other words, processor 312 may restart the mobility management timer in an event that a NAS signalling connection that was released had been established for establishing an eCall or a call was released, and the mobility management timer is still running. Processor 312 may restart the mobility management timer in an event that the NAS signalling connection established for the eCall or the call moved to a MM-connected with RRC inactive indication, and the mobility management timer is still running. Additionally, or optionally, processor 312 may stop and restart the mobility management timer in an event that a NAS signalling connection is released and the mobility management timer is still running.
[0043] In some implementations, the MM-connected with RRC inactive indication may be a 5GMM-connected with RRC inactive indication. The NAS signalling connection may be a NAS signalling connection in EPS, or an N1 NAS signalling connection in a 5GS.
[0044] In some implementations, processor 312 may stop the mobility management timer, and processor 312 may restart the first timer with an initial value.
[0045] In some implementations, the call may be a call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service.
[0046] In some implementations, the mobility management timer may be a T3444 timer or a T3445 timer.
[0047] In some implementations, processor 312 may start the mobility management timer in an event that the apparatus 310 configured for an eCall only mode enters an IDLE mode or an MM-CONNECTED mode with RRC inactive indication. In some implementations, the IDLE mode may include an EMM-IDLE mode, or a 5GMM-IDLE mode, and the MM-connected mode with RRC inactive indication may include a 5GMM-CONNECTED mode with RRC inactive indication.
[0048] In some implementations, process 400 may further involve processor 312 starting the mobility management timer in an event that the apparatus configured for an eCall only mode moves from a GERAN or a UTRAN to an E-UTRAN or an NG-RAN with a T3243 timer running.
[0049] In some implementations, the mobility management timer may be a T3444 timer, and a request may be received from an upper layer of communication apparatus 310 for establishing the eCall over an IMS.
[0050] In some implementations, the mobility management timer may be a T3445 timer, and a request may be received from an upper layer of communication apparatus 310 to establish the call to an HPLMN designated non-emergency MSISDN or URI for test or terminal reconfiguration service.
[0051] In some implementations, processor 312 may stop the mobility management timer after a request is received for establishing the eCall or the call, reset the mobility management timer to an initial value, and restart the first timer with the initial value after a NAS signalling connection for the eCall or the call is released.
[0052] In some implementations, processor 312 may start the mobility management timer in an event that the apparatus configured for an eCall only mode moves from a GERAN or a UTRAN to an E-UTRAN or an NG-RAN with a T3243 timer running.
[0053] In some implementations, processor 312 may reset the mobility management timer to an initial value, and processor 312 may restart the first timer with the initial value after a NAS signalling connection for the eCall or the call is released.
[0054] In some implementations, processor 312 may stop the mobility management timer after the request is received for establishing the eCall or the call. Illustrative Processes
[0055] FIG. 4 illustrates an example process 400 in accordance with an implementation of the present disclosure. Process 400 may be an example implementation of above scenarios / schemes, whether partially or completely, with respect to a mobility management timer handling procedure. Process 400 may represent an aspect of implementation of features of communication apparatus 310. 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 of process 400 may be executed in the order shown in FIG. 4 or, alternatively, in a different order. Process 400 may be implemented by or in communication apparatus 310 or any suitable UE or machine type devices. Solely for illustrative purposes and without limitation, process 400 is described below in the context of communication apparatus 310 as a UE. Process 400 may begin at block 410.
[0056] At block 410, process 400 may involve processor 312 of communication apparatus 310 starting and maintaining a mobility management timer. Process 400 may proceed from block 410 to block 420.
[0057] At block 420, process 400 may involve processor 312 restarting the mobility management timer in an event that a NAS signalling connection that was released had been established for establishing an eCall or a call was released or the NAS signalling connection established for the eCall or the call moved to an MM-connected with RRC inactive indication, and the mobility management timer is still running.
[0058] In some implementations, the MM-connected with RRC inactive indication may be a 5GMM-connected with RRC inactive indication. The NAS signalling connection may be a NAS signalling connection in EPS, or an N1 NAS signalling connection in a 5GS.
[0059] In some implementations, process 400 may further involve processor 312 stopping the mobility management timer and restarting the mobility management timer with an initial value.
[0060] In some implementations, the call may be a call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service.
[0061] In some implementations, the mobility management timer may be a T3444 timer or a T3445 timer.
[0062] In some implementations, the mobility management timer may be a T3444 timer, and a request may be received from an upper layer of communication apparatus 310 for establishing the eCall over an IMS.
[0063] In some implementations, the mobility management timer may be a T3445 timer, and a request may be received from an upper layer of communication apparatus 310 to establish the call to an HPLMN designated non-emergency MSISDN or URI for test or terminal reconfiguration service.
[0064] In some implementations, process 400 may further involve processor 312 starting the mobility management timer in an event that the apparatus configured for an eCall only mode enters an IDLE mode or an MM-CONNECTED mode with RRC inactive indication. In some implementations, the IDLE mode may include an evolved packet system EMM-IDLE mode, or a 5GMM-IDLE mode, and the MM-connected mode with RRC inactive indication may include a 5GMM-CONNECTED mode with RRC inactive indication.
[0065] In some implementations, process 400 may further involve processor 312 starting the mobility management timer in an event that the apparatus configured for an eCall only mode moves from a GERAN or a UTRAN to an E-UTRAN or an NG-RAN with a T3243 timer running.
[0066] In some implementations, process 400 may further involve processor 312 stopping the mobility management timer after a request is received for establishing the eCall or the call, resetting the mobility management timer to an initial value, and restarting the first timer with the initial value after a NAS signalling connection for the eCall or the call is released.
[0067] In some implementations, process 400 may further involve processor 312 stopping the mobility management timer after the request is received for establishing the eCall or the call. Additional Notes
[0068] 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.
[0069] 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.
[0070] 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. ”
[0071] 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:maintaining, by a processor of an apparatus, a mobility management timer; andrestarting, by the processor, the mobility management timer in an event that a non-access-stratum (NAS) signalling connection that was released had been established for establishing an eCall or a call was released or the NAS signalling connection established for the eCall or the call moved to a mobility management (MM) -connected with radio resource control (RRC) inactive indication, and the mobility management timer is still running.2.The method of Claim 1, wherein the MM-connected with RRC inactive indication is a fifth-generation (5G) MM-connected with RRC inactive indication, and wherein the NAS signalling connection is a NAS signalling connection in an evolved packet system (EPS) , or an N1 NAS signalling connection in a fifth-generation system (5GS) .3.The method of Claim 1, wherein the restarting of the mobility management timer further comprises:stopping the mobility management timer; andrestarting the mobility management timer with an initial value.4.The method of Claim 1, wherein the call is a call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service.5.The method of Claim 1, wherein the maintaining of the mobility management timer further comprises:starting the mobility management timer in an event that the apparatus configured for an eCall only mode enters an IDLE mode or an MM-CONNECTED mode with RRC inactive indication.6.The method of Claim 5, wherein the IDLE mode comprises an evolved packet system (EPS) mobility management (EMM) -IDLE mode, or a 5GMM-IDLE mode; and wherein the MM-connected mode with RRC inactive indication comprises a 5GMM-CONNECTED mode with RRC inactive indication.7.The method of Claim 1, wherein the mobility management timer is a T3444 timer, and wherein a request is received from an upper layer of the apparatus for establishing the eCall over an internet protocol address (IP) multimedia subsystem (IMS) .8.The method of Claim 1, wherein the mobility management timer is a T3445 timer, and wherein a request is received from an upper layer of the apparatus to establish the call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service.9.The method of Claim 1, wherein the restarting of the mobility management timer further comprises:stopping the mobility management timer after a request is received for establishing the eCall or the call;resetting the mobility management timer to an initial value; andrestarting the first timer with the initial value after a non-access-stratum (NAS) signalling connection for the eCall or the call is released.10.The method of Claim 1, wherein the maintaining of the mobility management timer further comprises:starting the mobility management timer in an event that the apparatus configured for an eCall only mode moves from a global system for mobile communications (GSM) enhanced data rates for global evolution (EDGE) radio access network (GERAN) or a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) to an evolved UMTS radio access network (E-UTRAN) or a next generation radio access network (NG-RAN) with a T3243 timer running.11.An apparatus implementable in a user equipment (UE) , comprising:a transceiver configured to communicate wirelessly; anda processor coupled to the transceiver and configured to perform, via the transceiver, operations comprising:maintaining a mobility management timer; andrestarting the mobility management timer in an event that a non-access-stratum (NAS) signalling connection that was released had been established for establishing an eCall or a call was released or the NAS signalling connection established for the eCall or the call moved to a mobility management (MM) -connected with radio resource control (RRC) inactive indication, and the mobility management timer is still running.12.The apparatus of Claim 11, wherein the MM-connected with RRC inactive indication is a fifth-generation (5G) MM-connected with RRC inactive indication, and wherein the NAS signalling connection is a NAS signalling connection in an evolved packet system (EPS) , or an N1 NAS signalling connection in a fifth-generation system (5GS) .13.The apparatus of Claim 11, wherein, in restarting the mobility management timer, the processor further performs operations comprising:stopping the mobility management timer; andrestarting the mobility management timer with an initial value.14.The apparatus of Claim 11, wherein the call is a call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) for test or terminal reconfiguration service.15.The apparatus of Claim 11, wherein, in maintaining the mobility management timer, the processor further performs operations comprising:starting the mobility management timer in an event that the apparatus configured for an eCall only mode enters an IDLE mode or an MM-CONNECTED mode with RRC inactive indication .16.The apparatus of Claim 11, wherein the IDLE mode comprises an evolved packet system (EPS) mobility management (EMM) -IDLE mode, or a 5GMM-IDLE mode; and wherein the MM-connected mode with RRC inactive indication comprises a 5GMM-CONNECTED mode with RRC inactive indication.17.The apparatus of Claim 11, wherein the mobility management timer is a T3444 timer, and wherein a request is received from an upper layer of the apparatus for establishing the eCall over internet protocol address (IP) multimedia subsystem (IMS) .18.The apparatus of Claim 11, wherein the mobility management timer is a T3445 timer, and wherein a request is received from an upper layer of the apparatus to establish the call to a home public land mobile network (HPLMN) designated non-emergency mobile subscriber integrated services digital network number (MSISDN) or uniform resource identifier (URI) .19.The apparatus of Claim 11, wherein, in restarting the mobility management timer, the processor further performs operations comprising:stopping the mobility management timer after a request is received for establishing the eCall or the call;resetting the mobility management timer to the initial value; andrestarting the first timer with the initial value after a non-access-stratum (NAS) signalling connection for the eCall or the call is released.20.The apparatus of Claim 11, wherein, in maintaining the mobility management timer, the processor further performs operations comprising:starting the mobility management timer in an event that the apparatus configured for an eCall only mode moves from a global system for mobile communications (GSM) enhanced data rates for global evolution (EDGE) radio access network (GERAN) or a universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) to an evolved UMTS radio access network (E-UTRAN) or a next generation radio access network (NG-RAN) with a T3243 timer running.