EP4066552A1 - Mise à jour de zone de radiomessagerie et profil de mobilité - Google Patents

Mise à jour de zone de radiomessagerie et profil de mobilité

Info

Publication number
EP4066552A1
EP4066552A1 EP20806985.6A EP20806985A EP4066552A1 EP 4066552 A1 EP4066552 A1 EP 4066552A1 EP 20806985 A EP20806985 A EP 20806985A EP 4066552 A1 EP4066552 A1 EP 4066552A1
Authority
EP
European Patent Office
Prior art keywords
paging area
paging
wireless communication
communication device
mobility pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20806985.6A
Other languages
German (de)
English (en)
Inventor
Torgny Palenius
Johan Hill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Group Corp
Sony Europe BV
Original Assignee
Sony Group Corp
Sony Europe BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Group Corp, Sony Europe BV filed Critical Sony Group Corp
Publication of EP4066552A1 publication Critical patent/EP4066552A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/04—User notification, e.g. alerting and paging, for incoming communication, change of service or the like multi-step notification using statistical or historical mobility data

Definitions

  • Various examples of the invention generally relate to mobility management of a wireless communication device attachable to a cellular network. Various examples specifically relate to providing an updated paging area to the wireless communication device in accordance with a mobility pattern of the wireless communication device.
  • Mobile communication using a wireless communication device sometimes relies on operation of the UE in an idle mode. If compared to operation in a connected mode, power consumption can be reduced by operating the UE in the idle mode.
  • a receive capability of a wireless interface of the UE can be reduced if compared to operation in the connected mode. For instance, the wireless interface of the UE can be temporarily transitioned into an inactive state that is associated with a reduced power consumption if compared to an active state. Further, the wireless interface, when operating in the idle mode, may not be able to receive all signals transmitted by, e.g., a cellular network (NW).
  • NW cellular network
  • the wireless interface may monitor for paging signals transmitted by the cellular network, but not for others signals.
  • the UE may transition from the operation in the idle mode to operation in the connected mode. This may involve a random-access (RA) procedure.
  • RA random-access
  • the idle mode is associated with a discontinuous reception (DRX) cycle.
  • DRX discontinuous reception
  • the wireless interface of the UE transitions back and forth between the inactive state and the active state. This gives the cellular NW the opportunity to transmit the paging signal to the UE in accordance with the DRX cycle.
  • the DRX cycle can have ON-durations during which the wireless interface operates in the active state; and OFF-durations during which the wireless interface of the UE operates in the inactive state.
  • the on-durations of the DRX cycle are associated with so-called paging occasions (PO), because the NW has the opportunity to transmit one or more paging signals to the UE.
  • PO paging occasions
  • a respective paging area is typically defined: The paging area includes multiple cells of the cellular NW and paging signals are transmitted in the cells of the paging area. Thereby, the likelihood of successful transmission of the paging signal to the UE can be increased, even in view of possible UE mobility.
  • 3GPP 3rd Generation Partnership Project
  • 5G 5th Generation Partnership Project
  • the UE If the UE detects that it is leaving a TA, it can transmit a TA update request to the cellular NW. Then, the cellular NW can reconfigure the TA and transmit, to the UE, a corresponding TA update (TAU) accept message. Thereby, mobility management of the UE when operating in the idle mode becomes possible.
  • TAU TA update
  • the coverage area of the cellular NW may be subdivided into multiple TAs; then, the UE may be configured with the respectively predefined TA in which the UE is currently located. Further techniques of determining a TA for a UE are described in Modarres Razavi, Sara. Planning and Optimization of Tracking Areas for Long Term Evolution Networks. Diss. Linkoping University Electronic Press, 2014 and WO 2019/074263 A1.
  • a method of operating a node of a cellular network includes a plurality of cells.
  • the method includes receiving one or more paging area update request messages from a UE.
  • the one or more paging area update request messages include an information element that is indicative of a mobility pattern of the UE.
  • the method also includes determining a paging area.
  • the paging area is for paging the UE.
  • the paging area is determined based on the mobility pattern.
  • the method also includes transmitting a downlink message that is indicative of the paging area to the UE. Thereby, the paging areas configured at the UE.
  • a computer program or a computer program product or a computer-readable storage medium includes program code that can be loaded from a memory and executed by at least one processor. Executing the program code causes the at least one processor to perform a method of operating a node of a cellular network.
  • the cellular network includes a plurality of cells.
  • the method includes receiving one or more paging area update request messages from a UE.
  • the one or more paging area update request messages include an information element that is indicative of a mobility pattern of the UE.
  • the method also includes determining a paging area.
  • the paging area is for paging the UE.
  • the paging area is determined based on the mobility pattern.
  • the method also includes transmitting a downlink message that is indicative of the paging area to the UE. Thereby, the paging areas configured at the UE.
  • a node of a cellular network includes a plurality of cells.
  • the node includes control circuitry.
  • the control circuitry is configured to receive one or more paging area update request messages from a UE.
  • the one or more paging area update request messages include an information element indicative of a mobility pattern of the UE.
  • the method also includes determining a paging area for paging the UE based on the mobility pattern.
  • the method also includes transmitting a downlink message that is indicative of the paging area to the UE. Thereby, the paging area is configured at the UE.
  • a method of operating a UE is provided.
  • the UE is attachable to a cellular network which includes a plurality of cells.
  • the method includes transmitting one or more paging area update request messages to the cellular network.
  • the one or more paging area update request messages include an information element indicative of a mobility pattern of the UE.
  • the method also includes receiving a downlink message indicative of a paging area from the cellular network.
  • the method further includes configuring the paging area in accordance with the downlink message.
  • a computer program or a computer program product or a computer-readable storage medium includes program code that can be loaded from a memory and executed by at least one processor. Executing the program code causes the at least one processor to perform a method of operating a UE.
  • the UE is attachable to a cellular network which includes a plurality of cells.
  • the method includes transmitting one or more paging area update request messages to the cellular network.
  • the one or more paging area update request messages include an information element indicative of a mobility pattern of the UE.
  • the method also includes receiving a downlink message indicative of a paging area from the cellular network.
  • the method further includes configuring the paging area in accordance with the downlink message.
  • a UE that is attachable to a cellular network includes a plurality of cells.
  • the UE includes control circuitry.
  • the control circuitry is configured to transmit one or more paging area update request messages to the cellular network.
  • the one or more paging area update request messages include an information element.
  • the information element is indicative of a mobility pattern of the UE.
  • the control circuitry is further configured to receive a downlink message that is indicative of a paging area.
  • the downlink message is received from the cellular network.
  • the control circuitry is configured to configure the paging area in accordance with the downlink message.
  • a method of operating a node of a cellular network includes a plurality of cells.
  • the method includes receiving a sequence of paging area update request messages from a UE.
  • the method also includes determining a mobility pattern of the UE based on the sequence of the paging area update request messages.
  • the method further includes determining a paging area for paging the UE based on the mobility pattern.
  • the method further includes transmitting a downlink message indicative of the paging area to the UE. Thereby, the paging area is configured at the UE.
  • a computer program or a computer program product or a computer-readable storage medium includes program code that can be loaded from a memory and executed by at least one processor. Executing the program code causes the at least one processor to perform a method of operating a node of a cellular network.
  • the cellular network includes a plurality of cells.
  • the method includes receiving a sequence of paging area update request messages from a UE.
  • the method also includes determining a mobility pattern of the UE based on the sequence of the paging area update request messages.
  • the method further includes determining a paging area for paging the UE based on the mobility pattern.
  • the method further includes transmitting a downlink message indicative of the paging area to the UE. Thereby, the paging area is configured at the UE.
  • a node of a cellular network includes a plurality of cells.
  • the node includes control circuitry.
  • the control circuitry is configured to receive a sequence of paging area update request messages from a UE.
  • the node is also configured to determine a mobility pattern of the UE based on the sequence of paging area update request messages.
  • the node is, furthermore, configured to determine a paging area for paging the UE based on the mobility pattern.
  • the node is further configured to transmit a downlink message indicative of the paging area to the UE. Thereby, the paging areas configured at the UE.
  • FIG. 1 schematically illustrates a cellular NW according to various examples.
  • FIG. 2 schematically illustrates operation of the UE attachable to a cellular NW in a connected mode and in an idle mode according to various examples.
  • FIG. 3 is a signaling diagram of communication between the UE and a base station (BS) of a cellular NW according to various examples.
  • BS base station
  • FIG. 4 schematically illustrates TAs including multiple cells of a cellular NW according to various examples.
  • FIG. 5 schematically illustrates a TA list including multiple TAs according to various examples.
  • FIG. 6 schematically illustrates a BS according to various examples.
  • FIG. 7 schematically illustrates a mobility-control node of a cellular NW according to various examples.
  • FIG. 8 schematically illustrates a UE according to various examples.
  • FIG. 9 is a flowchart of a method according to various examples.
  • FIG. 10 schematically illustrates paging areas according to various examples.
  • FIG. 11 is a flowchart of a method according to various examples.
  • FIG. 12 is a flowchart of a method according to various examples.
  • FIG. 13 is a signaling diagram of communicating between a UE, BS, and a mobility- control node according to various examples.
  • circuits and other electrical devices generally provide for a plurality of circuits or other electrical devices. All references to the circuits and other electrical devices and the functionality provided by each are not intended to be limited to encompassing only what is illustrated and described herein. While particular labels may be assigned to the various circuits or other electrical devices disclosed, such labels are not intended to limit the scope of operation for the circuits and the other electrical devices. Such circuits and other electrical devices may be combined with each other and/or separated in any manner based on the particular type of electrical implementation that is desired.
  • any circuit or other electrical device disclosed herein may include any number of microcontrollers, a graphics processor unit (GPU), integrated circuits, memory devices (e.g., FLASH, random access memory (RAM), read only memory (ROM), electrically programmable read only memory (EPROM), electrically erasable programmable read only memory (EEPROM), or other suitable variants thereof), and software which co-act with one another to perform operation(s) disclosed herein.
  • any one or more of the electrical devices may be configured to execute a program code that is embodied in a non-transitory computer readable medium programmed to perform any number of the functions as disclosed.
  • the communication system may be implemented by a UE and an access node of a communication NW.
  • the access node may be implemented by a BS of a cellular NW.
  • Example NW architectures include the 3GPP Long Term Evolution (LTE) (4G) or New Radio (NR) (5G) architecture.
  • LTE Long Term Evolution
  • NR New Radio
  • the cellular NW may provide a wireless link between the UE and the BS.
  • Downlink (DL) signals may be transmitted by the BS and received by the UE.
  • Uplink (UL) signals may be transmitted by the UE and received by the BS.
  • a data connection between the UE and the cellular NW is not maintained. This helps to reduce the energy consumption of the UE. This is helpful, inter alia, for Machine Type Communication (MTC) or Internet of Things (IOT) devices that typically have a limited battery capacity. Also other devices may benefit from operation in the idle mode.
  • MTC Machine Type Communication
  • IOT Internet of Things
  • the UE can typically employ a DRX cycle including OFF-durations and ON-durations.
  • the wireless interface of the UE can be in an inactive state. For example, a modem of the wireless interface may be unfit to receive any data in the inactive state. Thereby, the energy consumption can be reduced.
  • the ON-durations can correlate with POs during which the modem can receive paging signals.
  • the wireless interface monitors for paging signals, e.g., by blind decoding of a DL control channel (i.e. , not based on dedicated scheduling information).
  • the idle-mode mobility management may be based on a mobility pattern of the UE.
  • the mobility pattern of the UE may be associated with one or more characteristics of the movement of the UE over the course of time.
  • the mobility pattern may be characterized by defined with respect to certain predefined patterns.
  • the mobility pattern of the UE could be selected from the group including: low-mobility UE; high-mobility UE, e.g., having a velocity exceeding a certain predefined threshold; UE traveling along mobility infrastructure arranged in the coverage area of the cellular network; static UE, e.g., associated with an IOT device; etc.
  • the mobility of the UE may be tracked and classified with respect to certain predefined classes. Thereby, additional information of the mobility-related behavior of the UE beyond its current location can be derived.
  • Table 1 Example implementations of a mobility pattern.
  • the idle-mode mobility management may include various aspects related to managing the communication between the cellular NW and the UE.
  • the idle-mode mobility management may include: determining a paging area; updating a paging area; configuring location updates from the UE; escalation strategy for paging a UE using multiple paging areas; radio-access network (RAN) paging versus core network (CN) paging; etc. All such and other tasks of the idle-mode mobility management may depend on the mobility pattern of the UE.
  • RAN radio-access network
  • CN core network
  • a paging area can include multiple cells of the cellular NW.
  • a paging area can define a certain area in which paging signals are transmitted to the UE.
  • Paging signals that trigger the transition from the operation of the UE in the idle mode towards the operation of the UE in a connected mode can be transmitted in multiple cells that form the paging area.
  • UE mobility can be accounted for, by transmitting the paging signals not only in a single cell (having a comparably limited spatial extent), but rather by transmitting the paging signals across the entire paging area, e.g., upon receiving a paging-request message from a core of the cellular NW and/or upon DL data for the UE being available in the DL transmit buffer of the cellular NW.
  • the paging area There are various implementations conceivable for the paging area. Some of these examples are listed in the Table 2 below.
  • Table 2 Examples of paging areas in the prior art.
  • a paging area subdivided into multiple sub-paging areas.
  • a UE can have a list of multiple sub-paging areas.
  • the list can be provided by the cellular NW and the UE may store the list, e.g., until moving to a cell that is not included in any one of the sub-paging areas included in the list.
  • the paging area is defined by a tracking-area list (TAL) and the sub-paging areas are defined by the TA included in the TAL.
  • TAL tracking-area list
  • Different UEs may be provisioned with different lists.
  • the UE can trigger a paging-area update (PAU).
  • PAU paging-area update
  • the paging area can be updated (PAU).
  • PAU PAU
  • This can include communicating a PAU request message from the UE to the network.
  • An example of a PAU request message is the TAU request message used by 3GPP networks, see Table 2. I.e. , it is possible to re-determine the paging area for the UE over the course of time.
  • the PAU can also include a DL PAU response message.
  • the DL PAU response message can be implemented by TAU Accept message used by 3GPP networks, see Table 2.
  • the PAU can be triggered if the UE detects that it leaves the paging area currently configured. Then, the UE can transmit the PAU request message.
  • the idle-mode mobility management may be executed per UE. For instance, different paging areas may be determined for different UEs, even though the UEs have the same location or are located within the same cell of the cellular NW. UE-specific paging areas can be determined. UE-specific mobility management is generally possible.
  • a PAU may be triggered when the UE enters a new paging area. It would also be possible to use a timing scheme to trigger the PAU. For instance, a timer at the UE and/or at the network may trigger the PAU upon expiry. Another trigger criterion would be load-balancing of a mobility-control node, e.g., to assign roughly the same number of tasks to each paging area. Yet another trigger criterion would be capability changes of the UE or changes to the DRX cycle. In a specific example, the TAU is initiated by UE sending the “TAU Request”, 3GPP TS 23.401 .
  • a TAU can be of different types which are summarized below, for further details see 3GPP TS 24.301 (NAS): (i) Mobility originated TAU, when UE enters TA, i.e. cell belonging to a TA, not in TAL. (ii) Periodic TAU when timer T3412 triggers the update. Note, this timer already is made possible to set to higher value for MTC devices (Section 4.3.17.3 of TS 23.401). (iii) Mobility Management Entity (MME) initiated load balancing (iv) When UE changes its capability information or other information e.g. DRX configurations or when NW changed mode/settings.
  • MME Mobility Management Entity
  • determining an appropriate paging area in particular determining a paging area having an appropriate size, can be an optimization problem.
  • Determining a paging area for a UE can be based on a trade-off scenario between, firstly, system resources used for transmitting the paging signals such as PAU messages; and, secondly, device power consumption. Other considerations in this trade-off include the likelihood of successful paging within acceptable latency.
  • the UE determines the paging area for paging the UE based on the mobility pattern of the UE.
  • the UE transmits an information element that is indicative of the mobility pattern while operating in the idle mode.
  • the idle-mode mobility management based on the mobility pattern of the UE without requiring the UE to transition to the connected mode.
  • the UE - while operating in the idle mode - transmits one or more PAU request messages that include an information element that is indicative of the mobility pattern of the UE.
  • the information element includes information that explicitly or implicitly indicates data associated with the examples of, e.g., Table 1.
  • Table 3 Distribution of logic between UE and cellular NW for determining mobility pattern of UE
  • NW-based observations are conceivable (example 1 of Table 3).
  • the cellular NW may receive multiple PAU request messages from the UE, as the UE changes its location.
  • the NW can then determine a direction and/or velocity of the UE by tracking the cells that receive the sequence of paging area update request messages.
  • the UE actively reports on its mobility pattern (examples 2 and 3 of Table 3).
  • respective information may be piggybacked to a PAU request message transmitted by the UE and received by the cellular NW. This helps to re-use the PAU request message also for reporting the mobility pattern.
  • the PAU request messages can include an information element that is indicative of the mobility pattern of the UE.
  • the information element may include a sequence of cell identities.
  • the UE may measure the strongest one or more cells at multiple times and report this sequence, e.g., along with respective timestamps.
  • the UE can detect broadcasted information elements by the cells of the cellular NW and can track its position by means of the cell identities. Different cells of the cellular NW are associated with a well-defined position and coverage area. For example, movement could be detected on paging area level, thereby providing the position of the UE at coarse granularity if compared to movement detected on cell-level. Then, the cellular NW can infer the mobility pattern based on the change of location.
  • the information element could include at least one location report of the UE.
  • the location report could be indicative of the current position of the UE at the time of transmitting the PAU request message.
  • the cellular NW can infer the mobility pattern based on the change of location.
  • the location report can be determined by executing a positioning measurement.
  • PRSs DL positioning-reference signals
  • Multilateration can be used.
  • non-PRS-based positioning measurements are conceivable. Such techniques may rely on satellite positioning using unidirectional transmission by the satellites.
  • sensors of the UE can be used to determine its movement with respect to the environment.
  • an accelerometer may be used.
  • the information element included in the PAU request message can include an indicator indicative of a velocity of the UE. For instance, a one-bit indicator may be used that a set of the velocity exceeds a certain predefined threshold.
  • an indication can be based on positioning measurement at the UE.
  • a change of location aware an observation time duration can be tracked by the UE and, thereby, the velocity can be inferred.
  • the information element included in the PAU request message could be indicative of a change of the position of the UE within an observation time duration.
  • Such a change of the position could be inferred by the UE based on multiple subsequently executed positioning measurements during the observation time duration.
  • the observation time duration could be predefined.
  • the observation time duration could correlate with typical velocities of travel along the mobility infrastructure.
  • the paging area can be well-balanced in view of the expected signaling overhead for mobility management on the one hand, as well as likelihood of successful paging on the other hand.
  • the optimization and/or the rule-based algorithm may receive the mobility pattern as an input.
  • the optimization may have a goal function that includes a first term associated with the control signaling overhead and a second term associated with the likelihood of successful paging.
  • the second term may depend on the mobility pattern.
  • the first term could depend on a number of cells included in the paging area.
  • the mobility infrastructure can be defined in associated map data.
  • the map data may be indicative of the geographical extents of the respective mobility infrastructure.
  • the map data could also include meta data associated with the mobility infrastructure, such as typical velocities of travel along the mobility infrastructure.
  • the map data can include geographic features.
  • the map data could include nodes and links between nodes defining the mobility infrastructure. The nodes may have specific geolocations, e.g., latitude and longitude.
  • the nodes may be defined, e.g., in WGS84 coordinates.
  • a comparison between such a-priori knowledge on the expected movement of UEs traveling along the mobility infrastructure with the observed mobility pattern can allow for the conclusion whether or not the UE moves along the respective mobility infrastructure.
  • it is possible to determine the paging are based on a comparison of the mobility pattern with the map data of the mobility infrastructure. It would be possible to identify the particular mobility infrastructure governing the observed mobility pattern. Then, if movement along the mobility infrastructure is detected, a tailored paging area for paging the wireless communication device can be determined. In particular, a geometric shape of the respective paging area can be aligned with the spatial arrangement of the mobility infrastructure.
  • the geometric shape of the paging area can correspond to an area in which coverage is provided by the cells of the paging area.
  • the paging area that is determined could be of an elongated shape along the mobility infrastructure.
  • control signaling overhead is reduced, because the amount of cells that are used to transmit paging signals are reduced (e.g., if compared to bulk TAs not aligned with the mobility infrastructure); on the other hand, reliability of paging is not compromised, because a priori knowledge on a likely location of the UE and the future is taken into account when determining the paging area taking into consideration the mobility pattern.
  • the determining of the paging area includes selecting the paging area from a plurality of predefined paging areas.
  • Predefined can mean that the respective predefined paging area has been determined prior to obtaining information on the mobility pattern of the UE (whereas in other scenarios the paging area can be determined in response to obtaining the information on the mobility pattern of the UE). This could be based on a spatial overlap between the coverage areas of the plurality of paging areas and the mobility pattern as indicated by the UE.
  • pre-existing paging areas can be utilized and the best-fitting paging area, taking into account the mobility pattern, can be selected.
  • a DL message - e.g., the PAU response message - can be indicative of a predefined index of the selected paging area.
  • control signaling overhead can be significantly reduced.
  • the determining of the paging area includes a full or partial re configuration thereof.
  • the determining of the paging area can include selecting multiple cells from the plurality of cells. Flere, the individual spatial overlap between each one of the plurality of cells in the mobility pattern of the UE may or may not be taken into account.
  • the paging area can be defined based on the multiple cells selected.
  • sub-paging areas e.g., in a scenario in which the paging area is implemented by a TAL, it would be possible to select the individual TAs.
  • a spatial overlap between the coverage areas of each sub-paging area and the mobility pattern may be considered.
  • a DL message - e.g., a PAU response message - may include a list of identities of the multiple sub-paging areas or cells as selected.
  • FIG. 1 schematically illustrates a cellular NW 100.
  • the example of FIG. 1 illustrates the cellular NW 100 according to the 3GPP 5G architecture. Details of the 3GPP 5G architecture are described in 3GPP TS 23.501 , version 15.3.0 (2017-09). While FIG. 1 and further parts of the following description illustrate techniques in the 3GPP 5G framework of a cellular NW, similar techniques may be readily applied to other communication protocols. Examples include 3GPP LTE 4G - e.g., in the MTC or NB- IOT framework - and even non-cellular wireless systems, e.g., an IEEE Wi-Fi technology.
  • a UE 101 is connectable to the cellular NW 100.
  • the UE 101 may be one of the following: a cellular phone; a smart phone; an IOT device; a Machine Type Communication (MTC) device; a sensor; an actuator; etc.
  • MTC Machine Type Communication
  • the UE 101 is connectable to a CN 115 of the cellular NW 100 via a RAN 111 , typically formed by one or more BSs 112 (only a single BS 112 is illustrated in FIG. 1 for sake of simplicity).
  • a wireless link 114 is established between the RAN 111 - specifically between one or more of the BSs 112 of the RAN 111 - and the UE 101 .
  • the wireless link 114 implements a time-frequency resource grid.
  • OFDM Orthogonal Frequency Division Multiplexing
  • a carrier includes multiple subcarriers.
  • the subcarriers (in frequency domain) and the symbols (in time domain) then define time-frequency resource elements of the time-frequency resource grid.
  • a protocol time base is defined, e.g., by the duration of frames and subframes including multiple symbols and the start and stop positions of the frames and subframes.
  • Different time-frequency resource elements can be allocated to different logical channels or reference signals of the wireless link 114. Examples include: Physical DL Shared Channel (PDSCH); Physical DL Control Channel (PDCCH); Physical UL Shared Channel (PUSCH); Physical UL Control Channel (PUCCH); channels for RA; etc.
  • the CN 115 includes a user plane (UP) 191 and a control plane (CP) 192.
  • Application data is typically routed via the UP 191.
  • UP user plane
  • CP control plane
  • UPF UP function
  • the UPF 121 may implement router functionality.
  • Application data may pass through one or more UPF(s) 121.
  • the UPF 121 acts as a gateway towards a data NW 180, e.g., the Internet or a Local Area NW.
  • Application data can be communicated between the UE 101 and one or more server(s) on the data NW 180.
  • the cellular NW 100 also includes one or more mobility-control nodes, here implemented by an Access and Mobility Management Function (AMF) 131 and a Session Management Function (SMF) 132.
  • the cellular NW 100 further includes a Policy Control Function (PCF) 133; an Application Function (AF) 134; a NW Slice Selection Function (NSSF) 134; an Authentication Server Function (AUSF) 136; and a Unified Data Management (UDM) 137.
  • PCF Policy Control Function
  • AF Application Function
  • NSSF NW Slice Selection Function
  • AUSF Authentication Server Function
  • UDM Unified Data Management
  • FIG. 1 also illustrates the protocol reference points N1-N22 between these nodes.
  • the AMF 131 provides one or more of the following functionalities: connection management sometimes also referred to as registration management; NAS termination for communication between the CN 115 and the UE 101 ; connection management; reachability management; mobility management; connection authentication; and connection authorization.
  • connection management sometimes also referred to as registration management
  • NAS termination for communication between the CN 115 and the UE 101
  • connection management for communication between the CN 115 and the UE 101
  • connection management reachability management
  • mobility management connection authentication
  • connection authorization For example, the AMF 131 controls CN- initiated paging of the UE 101 , if the respective UE 101 operates in the idle mode.
  • the AMF 131 may trigger transmission of paging signals, including a paging indicator and a paging message, to the UE 101 ; this may be time-aligned with POs.
  • the AMF 131 may determine TAs or TALs.
  • the AMF 131 may be configured to determine the TA or TAL when performing a TAU.
  • the AMF 131 After UE registration to the NW, the AMF 131 creates a UE context 459 and keeps this UE context, at least as long as the UE 101 is registered to the NW.
  • the UE context 459 can hold one or more identity/identities of the UE 101.
  • the UE context 459 may hold a TA or TAL of the UE 101.
  • a data connection 189 is established by the SMF 132 if the respective UE 101 operates in the connected mode.
  • the data connection 189 is characterized by UE subscription information hosted by the UDM 137.
  • the AMF 131 sets the UE 101 to CM-CONNECTED or CM-IDLE.
  • CM- CONNECTED a non-access stratum (NAS) connection is maintained between the UE 101 and the AMF 131.
  • the NAS connection implements an example of a mobility control connection.
  • the NAS connection may be set up in response to paging of the UE 101.
  • the SMF 132 provides one or more of the following functionalities: session management including session establishment, modify and release, including bearers set up of UP bearers between the RAN 111 and the UPF 121 ; selection and control of UPFs; configuring of traffic steering; roaming functionality; termination of at least parts of NAS messages; etc.
  • session management including session establishment, modify and release, including bearers set up of UP bearers between the RAN 111 and the UPF 121 ; selection and control of UPFs; configuring of traffic steering; roaming functionality; termination of at least parts of NAS messages; etc.
  • the AMF 131 and the SMF 132 both implement CP mobility management needed to support a moving UE.
  • the data connection 189 is established between the UE 101 via the RAN 111 and the UP 191 of the CN 115 and towards the DN 180.
  • a connection with the Internet or another packet data NW can be established.
  • a server of the DN 180 may host a service for which payload data is communicated via the data connection 189.
  • the data connection 189 may include one or more bearer(s) such as a dedicated bearer or a default bearer.
  • location-based services can rely on a location report from the UE 101 .
  • the data connection 189 may be defined on the RRC layer, e.g., generally Layer 3 of the OSI model.
  • FIG. 2 illustrates aspects with respect to different modes 301 - 302 in which the UE 101 can operate.
  • Example implementations of the operational modes 301 - 302 are described, e.g., in 3GPP TS 38.300, e.g., version 15.0.0.
  • the data connection 189 is set up.
  • a default bearer and optionally one or more dedicated bearer(s) may be set up between the UE 101 and the cellular NW 100.
  • a wireless interface of the UE 101 may persistently operate in an active state, or may implement a DRX cycle including periodic switching between the active state and an inactive state.
  • the UE 101 typically operates in accordance with a DRX cycle.
  • the wireless interface of the UE 101 can be transitioned into an inactive state.
  • the data connection 189 is released.
  • Paging signals are transmitted in one or more TA(s) or RNA(s) to transition the UE 101 back into the connected mode 301 , using a RA procedure.
  • the idle mode 302 may or may not be transparent to the CN 115.
  • the idle mode 302 could be implemented, e.g., by RRCJnactive or RRCJdle according to the 3GPP protocol.
  • RRCJnactive may rely on paging triggered by the RAN 111 , without involvement of the AMF 131 and the SMF 132; while RRCJdle may use paging triggered by the AMF 131. Details with respect to paging and the RA procedure are described in connection with FIG. 3.
  • FIG. 3 schematically illustrates aspects with respect to paging.
  • FIG. 3 also illustrates aspects with respect to a RA procedure 600 according to various examples.
  • FIG. 3 is a signaling diagram of communication between the UE 101 and the BS 112.
  • the UE 101 may periodically listen to information blocks broadcasted by one or more BS(s) of the NW.
  • the broadcasted information blocks may include such information as a cell identity of the broadcasting BS. This can be used by the UE 101 to track its position. The UE 101 could report the cell identities to the cellular NW 100.
  • the UE 101 may monitor for paging indicators and paging messages (paging signals). Blind decoding of the PDCCH for receiving the paging indicator can be implemented at a PO.
  • the paging signals can be transmitted in a paging area - e.g., in one or more TA(s) (e.g., included in a TAL) or a RNA.
  • a connection establishment attempt may then be initiated using the RA procedure 600.
  • the UE 101 may transmit a RA preamble to the BS 112, in a respective RAmsgl 6001.
  • This RAmsgl 6001 may be indicative of a temporary identity of the UE 101.
  • the UE 101 may receive, at 6502, a RA response message, the RAmsg2 6002.
  • the RAmsg2 may include a new temporary identity for the UE 101 , timing adjustment information, and an UL scheduling grant for time-frequency resources.
  • the UL scheduling grant may be addressed to the UE’s 101 RA Radio NW Temporary Identity (RA-RNTI).
  • RA-RNTI Radio NW Temporary Identity
  • the UE 101 can send, at 6503, a RRC connection request RAmsg3 603.
  • the UE 101 may receive, at 6504, a contention resolution message RAmsg4 6004 to ensure the right UE is addressed. This finalizes or aborts establishment of the data connection 189.
  • the UE 101 is then transitioned into operation into the connected mode 301.
  • FIG. 4 schematically illustrates aspects with respect to multiple paging areas, here implemented as TAs 171 , 172.
  • FIG. 4 schematically illustrates the UE 101 and a further UE 101 -1 .
  • the UE 101 and the further UE 101 -1 are attachable to the cellular NW 100.
  • a first TA 171 includes multiple cells 170 (all having different cell identities, CIDs) supported by the BSs 112-1 - 112-6.
  • a second TA 172 includes the cells 170 provided by the BSs 112-7 - 112-9 (the first TA 171 is schematically illustrated by the checkerboard filling pattern; and the second TA 172 is schematically illustrated by the dashed filling in FIG. 4).
  • the scenario of FIG. 4 corresponds to the scenario of Table 2, #1.
  • FIG. 5 schematically illustrates aspects with respect to paging areas, here implemented by TALs 176 - 177.
  • the TAL 176 includes the TAs 171 - 172; the TAL 177 includes the TAs 171 , 173.
  • the UE 101 is configured with the paging area implemented by the TAL 176; while the UE 101 - 1 is configured with the paging area implemented by the TAL 177.
  • the TAs 171-173 can be referred to as sub-paging areas, since they are fractions of the TALs 176, 177.
  • the TA index of the TAs 171 - 173 is implemented by the PLMNID in combination with the TAC.
  • FIG. 6 schematically illustrates the BS 112 at greater detail.
  • the BSs 112-1 - 112-9 can be configured in a similar manner.
  • the BS 112 includes a control circuitry 1122, e.g., implemented by one or more processor(s).
  • the control circuitry 1122 is coupled with a non-volatile memory 1123.
  • Program code is stored on the memory 1123 and can be loaded and executed by the control circuitry 1122. Executing the program code causes the control circuitry 1122 to perform methods as described herein, e.g.: transmitting a paging signal 6000 to the UE 101 ; receiving a PAU request message from the UE 101 ; determining a new paging area, e.g., a RNA; transmitting a PAU response message to the UE 101 ; participating in a RA procedure 600 with the UE 101.
  • the BS 112 For communicating on the wireless link 114 and/or with nodes of the core NW 115, the BS 112 includes an interface 1125.
  • FIG. 7 schematically illustrates the AMF 131 at greater detail. While FIG. 7 illustrates the AMF 131 , other nodes of the cellular NW 100 - e.g., a mobility-control node, the SMF 132, etc. - can be configured similarly.
  • the AMF 131 includes a control circuitry 1312, e.g., implemented by one or more processor(s).
  • the AMF 131 also includes a non-volatile memory 1313 that is coupled with the control circuitry 1313. Program code is stored on the memory 1313 and can be loaded and executed by the control circuitry 1312.
  • Executing the program code causes the control circuitry 1312 to perform methods as described herein, e.g.: participating in a TAU for a UE 101 ; receiving one or more TAU request message(s) from the UE 101 ; transmitting TAU response messages indicative of a determined paging area to the UE 101 ; determining a paging area - e.g., a TA or a TAL - based on one or more characteristic(s) of the UE such as a mobility pattern of the UE; extracting the mobility pattern from an information element piggybacked to the TAU request message received from the UE 101 ; determining spatial overlaps between the mobility pattern and one or more cell(s) and/or one or more paging area(s), when determining the paging area.
  • the AMF 131 includes an interface 1315.
  • FIG. 8 schematically illustrates the UE 101 at greater detail.
  • the UE 101 includes a control circuitry 1102, e.g., implemented by one or more processor(s).
  • the UE 101 also includes a non-volatile memory 1013 that is coupled with the control circuitry 1012. Program code is stored on the memory 1013 and can be loaded and executed by the control circuitry 1012.
  • Executing the program code causes the control circuitry 1012 to perform methods as described herein, e.g.: transmitting a PAU request message including an information element indicative of a mobility pattern of the UE 101 ; determining the mobility pattern, e.g., based on execution of one or more positioning measurement(s) and/or by tracking a cell identity of cells of the cellular NW in coverage of the UE 101 ; receiving a DL PAU response message from the cellular NW indicative of a paging area that is determined in accordance with the mobility pattern.
  • the UE 101 includes a wireless interface 1015.
  • FIG. 9 is a flowchart of a method according to various examples.
  • the method of FIG. 9 can be executed by a node of a cellular NW.
  • the method of FIG. 9 could be executed by a BS of a RAN of the cellular NW or by a CN node of the cellular NW.
  • the method of FIG. 9 could be executed by the AMF 131 of the CN115 of the cellular NW 100, or could be executed by the BS 112 of the RAN 111 of the cellular NW 100 (cf. FIG. 1 ).
  • the node receives a PAU request message.
  • a PAU request message may include an information element, e.g., piggybacked to the PAU request message or included in a payload section thereof.
  • the information element can be a 1-bit information element or a multi-bit information element.
  • the information element is indicative of a mobility pattern of a UE that transmits the PAU request message.
  • the mobility pattern could include a direction and/or a velocity of the UE.
  • the information element includes one or more location report(s) of the UE.
  • the information element may include multiple location reports with associated timestamps. Thereby, a change of the position can be determined.
  • the information element includes an indicator indicative of a velocity of the UE that transmits the PAU request message.
  • the indicator could indicate whether the velocity is larger or smaller than a certain predefined threshold.
  • the information element is indicative of a change of position of the UE within an observation time duration.
  • a sequence of cell identities of the cells of the cellular NW could be included, e.g., with associated timestamps.
  • a movement of the UE can be defined along the geo-locations of the cells of the sequence; the velocity is given by the change of the geolocation over the course of time, as indicated by the timestamps.
  • the sequence of cell identities is related to the mobility pattern.
  • an information element indicative of the mobility pattern is included.
  • determining the paging area box 5002 There are various options available for implementing the determining of the paging area box 5002. For instance, it would be possible to determine the paging area by selecting multiple cells from a plurality of cells. Alternatively or additionally, sub-paging areas may be selected. This may be based on a spatial overlap between each one of the plurality of cells or sub-paging areas and the mobility pattern of the UE. Then, the paging area can be defined based on the multiple cells that are selected. In such a scenario, determining the paging area can include newly defining the paging area.
  • determining the paging area includes selecting the paging area from a plurality of predefined paging areas. This may be based on an aggregate spatial overlap between the coverage area of the plurality of paging areas and the mobility pattern. In other words, it may not be required to break down the individual spatial overlap for each cell, but rather assess an aggregate overlap on paging area granularity.
  • the DL message that is transmitted next at box 5003 to configure the respectively determined paging area at the UE is implemented differently.
  • the DL message transmitted at box 5003 includes a list of identities of the individual cells or sub-paging areas.
  • a TAL including multiple TAs could be transmitted at box 5003.
  • a predefined paging area selected at box 5002 it would be sufficient to include, in the DL control message transmitted at box 5003, respectively predefined index of the selected paging area. For instance, a TAC or an index of a TAL could be signaled.
  • An example of an index of a TAL would be: there may be six TALs preconfigured at the UE and the network, each TAL has a unique index selected from ⁇ 1 ... .6 ⁇ .
  • the DL control message could then include the index “2” - thereby, identifying the second out of the six pre-configured TALs. This corresponds to a codebook approach. This can help to reduce control signaling overhead, because it is sufficient to signal the index of the TAL instead of the entire TAL.
  • FIG. 10 schematically illustrates aspects with respect to multiple paging area 771 - 772, 775.
  • FIG. 10 schematically illustrates a current location 701 of the UE 101 , as well as a current direction and velocity, i.e. , a current mobility pattern 702.
  • map data of a mobility infrastructure 750 e.g., a road or train track (albeit the mobility infrastructure 570 is shown having a linear shape, it can include curves, etc.) - it is apparent that the UE 101 moves along the mobility infrastructure 750.
  • the determined paging area 750 is of elongated shape and a longitudinal axis of the paging area 775 is aligned with the mobility infrastructure 750.
  • a future mobility pattern 705 based on the current mobility pattern 702 of the UE 101.
  • the assumption can be used that the position/location 701 of the UE 101 varies along the mobility infrastructure 750, over the course of time.
  • Such information of the future mobility pattern may be used in more accurately determining the paging area 775. For example, a length of the paging area 775 may be thus determined. It is not required in all scenarios that map data of the mobility infrastructure is used in connection with the determining of the paging area 775.
  • reference mobility patterns of an ensemble of UEs attachable to the cellular NW For instance, if, based on big-data collection, certain re-occurring mobility patterns are identified for an ensemble of fast moving UEs, this can be used to conclude back on the mobility infrastructure for supporting such mobility patterns for the multiple UEs. This can be done without a ground truth such as the map data.
  • FIG. 11 is a flowchart of a method according to various examples.
  • the method of FIG. 11 may be executed by a UE, e.g., by the UE 101 (of. FIG. 1 ).
  • a PAU request message is transmitted.
  • a TAU request message may be transmitted.
  • Box 5051 is inter-related with box 5001 .
  • the PAU request message is transmitted upon detecting a change of a mobility pattern of the UE. For instance, such a change could be associated with a significant deviation of the velocity and/or direction of the UE.
  • predefined thresholds can be monitored. For instance, such a change of the mobility pattern could be associated with the detection that the UE starts using or stops using a mobility infrastructure in a coverage area of the respective cellular NW.
  • Other reasons for transmitting the PAU request message at box 5051 include, e.g., expiry of a respective timer or detection that UE mobility has caused the UE to leave a previously configured paging area.
  • the PAU request message transmitted at box 5051 may optionally an information element that is indicative of the mobility pattern of the UE.
  • determining the mobility pattern there are various options available for determining the mobility pattern. For instance, it would be possible to execute a positioning measurement. Alternatively or additionally, it would be possible to track cell identities of cells in which coverage area the UE has previously moved. Also, sub-paging areas can be tracked.
  • the UE Upon transmitting the PAU request message at box 5051 , the UE next receives, at 5052, a DL message, e.g., a PAU response message.
  • the DL message received at box 5052 is indicative of a paging area.
  • the paging area is determined at the cellular NW, e.g., taking into account the mobility pattern of the UE.
  • Box 5052 is inter-related with box 5003 of FIG. 9.
  • the UE configures the paging area. For instance, this can include setting respective timers and loading, to the memory, correspondence cell identities of cells included in the respective paging area.
  • FIG. 12 is a flowchart of a method according to various examples. The method of FIG. 12 can be executed by the UE 101 (of. FIG. 1 ). FIG. 12 illustrates an example operational method of the UE 101 in further detail, beyond what is illustrated in the method of FIG. 11 .
  • the method starts at 5101. At this point, the UE 101 operates in the idle mode 302.
  • the UE 101 implements a DRX cycle.
  • an OFF-duration of the DRX is active. Accordingly, the wireless interface of the UE 101 operates in an inactive state. Flere, it is not suited to receive data.
  • the method proceeds to box 5102.
  • the UE 101 wakes up, boots, and acquires synchronization with the RAN 111 , e.g., by receiving synchronization signals.
  • one or more paging signal(s) can be received, e.g., a wake up signal, a paging indicator, and/or a paging message.
  • a broadcasted information block the respective BS 112 of the RAN 111 can be received.
  • This can include a cell identity, a TAC, and a PLMNID.
  • a channel sensing can be performed, e.g., to detect the Received Signal Power (RSRP).
  • RSRP Received Signal Power
  • information indicative of the mobility pattern of the UE 101 is determined.
  • this is based on the cell identity (CID) or TA identity, e.g., TAC, for the strongest measured cell.
  • CID cell identity
  • TA identity e.g., TAC
  • Such measurements can be stored from a sequence of observations / periods of the DRX cycle; such sequence - in FIG. 12, n, n-1 , n-2, ... - and can indicate how the UE moves across cells or TAs.
  • Such information i.e. , a sequence of said identities previously detected by the UE, can be provided to the AMF 131.
  • the AMF 131 can then combine information to derive the movement and change of location over the course of time.
  • a correlation with information on mobility infrastructure can be made. This can be compared with knowledge on how cells and TAs are deployed in the cellular NW.
  • the CIDs/TACs of the strongest scene cells are compared with earlier detected CIDs/TACs, i.e. , from proceeding on durations of the DRX cycle. If the CID or TAC has changed, it is likely that the UE is moving. The UE can also check if the strongest cell/TA identities is in the TAL has currently configured, if applicable. Another option would be to not implement any comparison of the CIDs or TACs at box 5103, but simply forward the corresponding information to the cellular NW 100 to implement such comparison.
  • determining the information indicative of the mobility pattern at box 5103 For instance, it would be possible to execute a positioning measurement at box 5103. For example, it would be possible to detect that the velocity is larger than a predefined threshold. This could be based, e.g., on satellite positioning measurements. If the UE 101 has a velocity that exceeds the threshold, again it can be concluded that the mobility pattern corresponds to a moving UE along a mobility infrastructure.
  • a TAU it is then judged whether a TAU is required. For instance, this could be based on detecting that the mobility pattern determined at box 5103 fulfills certain predefined requirements and/or has changed. Other trigger criteria are conceivable such as, e.g., a timer expiring or the UE moving out of the previously configured TA. For example, could be checked whether the mobility pattern matches the spatial arrangement of a mobility infrastructure. In other words, box 5104 could be checked whether the UE moves along a mobility infrastructure. If yes, a TAU may be required.
  • a TAU request message is transmitted by the UE 101 to the cellular NW 100.
  • a TAU response message is received, which may include an updated TA or TAL.
  • the information associated with the mobility pattern determined at box 5103 can be included in the TAU request message transmitted at box 5106.
  • a corresponding information element may be included.
  • the information element can, e.g., include the CIDs and/or TAs within an observation duration.
  • a location report could be provided, e.g., based on multiple positioning measurement previously performed.
  • the velocity and/or direction of the UE may be indicated by the information element. This facilitates the AMF 131 evaluating the information element, i.e. , determining the new paging area based on the mobility pattern of the UE.
  • decision algorithms can be applied. These decision algorithms can specify how to determine the paging area for the UE.
  • One or more optimization algorithms can be used, i.e., using iterative maximization of a goal function.
  • a corresponding objective function can consider control signaling overhead, e.g., for paging signals to be transmitted across a large count of cells.
  • the objective function can also consider an estimated likelihood of successfully paging the UE and the paging area, given the mobility pattern of the UE. Thereby, paging areas can be fully reconfigured, i.e., newly defined; or, it would be possible to select the paging area from predefined set of paging areas.
  • respective indicator can indicate the selected paging area.
  • a TAL ID can be included in the TAU response message at box 5107.
  • Such TALs or other predefined paging areas could be configured during connected mode 301 or at a proceeding TAU.
  • the control signaling overhead during idle mode 302 can be reduced, thereby also reducing the UE power consumption.
  • the UE triggers another OFF-duration of the discontinuous reception cycle, operating its wireless interface in the inactive state.
  • the UE may also enter connected mode, which would end the method at box 5109.
  • FIG. 13 is a signaling flowchart of signaling between the UE 101 , the BS 112, and the AMF 131.
  • the UE moves its wireless interface to the active state, while operating in the idle mode 302. Box 5201 corresponds to box 5102 of FIG. 12.
  • the UE determines information associated with its mobility pattern. Box 5202 corresponds to box 5103 of FIG. 12. Then, at 5203, a PAU request message - here, implemented by the TAU request message 6001 - is transmitted by the UE 101 received by the BS 112, and then relayed on to the AMF 131 , or another mobility-control node at 5204.
  • the TAU request message 6001 includes an information element 6002 that is indicative of the mobility pattern of the UE 101. It can include the information determined at box 5202.
  • the CIDs orTACs observed in the recent observation duration - e.g., for multiple transitions to the active state and subsequent ON-durations of the DRX cycle - are included, optionally associated with respective timestamps.
  • the AMF 131 can conclude on the velocity and direction / heading of the UE 101 .
  • the AMF 131 at box 5205 determines the appropriate paging area. For instance, spatial overlaps between the mobility pattern - e.g., derived predicted locations in accordance with the mobility pattern - and the various cells or TAs of the cellular NW 100 could be determined and considered at box 5205.
  • a DL message - here, a TAU accept message 6003 - is transmitted to the UE 101 and received by the UE 101.
  • the TAU accept message includes a TAL, e.g., including identities of multiple TAs; or includes a TAL identity, in case at box 5205 a predefined TAL are selected.
  • the TAU accept message could also include a list of cell identities for forming a new TA or simply indicate a new TA.
  • the UE 101 then transmits a confirmation message 6004.
  • the UE has done configured the new paging area, e.g., implemented by the TAL.
  • the UE 101 then moves its wireless interface back to the inactive state.
  • the paging areas are determined taking into consideration a mobility pattern of the UE.
  • the paging area can be determined depending on whether the UE moves along a static mobility infrastructure within the coverage area of the cellular NW, e.g., roads or railways.
  • the number of mobility-generating TAUs can be small.
  • TAU "storms" - scenarios in which a large count of UEs request a TAU simultaneously - can be prevented or mitigated. This will offload the preprocessing at the mobility control node such as the AMF or the MME in case of 3GPP 4G scenarios.
  • MTC or IOT devices typically do not have the same behavior as normal UEs where many application send/receive payload data often. By such payload data, it may be often required to transition the UE into operation in the connected mode. Thus, operation in the idle mode may be occurring less often for normal UEs, if compared to MTC or IOT devices. MTC or IOT devices will be paged less often.
  • the techniques described herein which facilitate determining the TA based on the mobility pattern without the need of transitioning the operation of the UE into a connected mode can have particular benefits in terms of power consumption for such device types.
  • idle-mode mobility management in particular determining a paging area, is based on a mobility pattern of the UE. According to various examples, it would be possible to determine a paging area or more generally perform idle-mode mobility management based on one or more other characteristics of the UE, e.g., alternatively or additionally to the mobility pattern. To give a few examples, it would be possible to perform the idle-mode mobility management based on a device category of the UE.
  • Example device categories include, but are not limited to: normal UE; a MTC UE; loT UE; UE employing Coverage Enhancement (CE); single-subscriber identity module or multi-subscriber identity module (SIM) UE; etc.
  • Further characteristics include, but are not limited to: UE having a relay activity activated or deactivated; UE having enabled emergency services; an application associated with the operation of the UE or associated with data transfer of the UE; a time duration since when the respective UE is operating in the idle mode; etc.

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Abstract

Selon divers exemples, une zone de radiomessagerie est déterminée en fonction d'un profil de mobilité d'un dispositif de communication sans fil. Le profil de mobilité peut être déterminé alors que le dispositif de communication sans fil est en mode de fonctionnement inactif. Par exemple, un message de demande de mise à jour de zone de radiomessagerie peut comprendre un élément d'information qui indique le profil de mobilité. Il serait également possible de déterminer le profil de mobilité en fonction d'une séquence de messages de demande de mise à jour de zone de radiomessagerie.
EP20806985.6A 2019-11-29 2020-11-11 Mise à jour de zone de radiomessagerie et profil de mobilité Pending EP4066552A1 (fr)

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KR102463290B1 (ko) * 2016-08-02 2022-11-04 삼성전자 주식회사 차세대 이동통신 시스템에서 네트워크 소모 전력을 효과적으로 절감시키는 방법 및 장치
CN114745780B (zh) * 2017-02-10 2024-03-15 三星电子株式会社 无线通信***中非活动模式操作的方法和装置
AU2017429661B2 (en) * 2017-08-28 2021-11-04 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Method for paging, access network device, and terminal device
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