WO2022233694A1 - Traitement du rejet ou du rejet partiel d'une demande d'intervalle par un équipement utilisateur - Google Patents

Traitement du rejet ou du rejet partiel d'une demande d'intervalle par un équipement utilisateur Download PDF

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Publication number
WO2022233694A1
WO2022233694A1 PCT/EP2022/061305 EP2022061305W WO2022233694A1 WO 2022233694 A1 WO2022233694 A1 WO 2022233694A1 EP 2022061305 W EP2022061305 W EP 2022061305W WO 2022233694 A1 WO2022233694 A1 WO 2022233694A1
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WO
WIPO (PCT)
Prior art keywords
gap
base station
message
subscriber identity
identity module
Prior art date
Application number
PCT/EP2022/061305
Other languages
English (en)
Inventor
Aby KANNEATH ABRAHAM
Srinivasan Selvaganapathy
Faranaz SABOURI-SICHANI
Laura Luque SANCHEZ
Original Assignee
Nokia Technologies Oy
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 Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2022233694A1 publication Critical patent/WO2022233694A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements

Definitions

  • a terminal device may be utilized to enable better usage of resources and enhanced user experience to a user of the terminal device.
  • an apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; and transmit, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • an apparatus comprising means for: transmitting, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; and transmitting, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • a method comprising: transmitting, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; and transmitting, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • a computer program comprising instructions for causing an apparatus to perform at least the following: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; and transmit, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; and transmit, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; and transmit, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • an apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; receive, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocate one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • an apparatus comprising means for: transmitting, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; receiving, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocating one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • a method comprising: transmitting, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; receiving, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocating one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • a computer program comprising instructions for causing an apparatus to perform at least the following: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; receive, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocate one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; receive, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocate one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmit, to a first base station associated with a first universal subscriber identity module, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station; receive, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocate one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • an apparatus comprising at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to: transmit, to a terminal device, a message indicating a timer, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the terminal device from retrying the gap request during the time interval.
  • an apparatus comprising means for: transmitting, to a terminal device, a message indicating a timer, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the terminal device from retrying the gap request during the time interval.
  • a method comprising: transmitting, to a terminal device, a message indicating a timer, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the terminal device from retrying the gap request during the time interval.
  • a computer program comprising instructions for causing an apparatus to perform at least the following: transmit, to a terminal device, a message indicating a timer, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the terminal device from retrying the gap request during the time interval.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmit, to a terminal device, a message indicating a timer, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the terminal device from retrying the gap request during the time interval.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the following: transmit, to a terminal device, a message indicating a timer, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the terminal device from retrying the gap request during the time interval.
  • a system comprising at least a terminal device and a first base station.
  • the terminal device is configured to: transmit, to the first base station, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station, wherein the first base station is associated with a first universal subscriber identity module; receive, from the first base station, a rejection message indicating at least a partial rejection of the first gap request; and transmit, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after receiving the rejection message.
  • the first base station is configured to: receive the first message from the terminal device; transmit the rejection message to the terminal device; and receive the second message from the terminal device.
  • a system comprising at least a terminal device and a first base station.
  • the terminal device comprises means for: transmitting, to the first base station, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station, wherein the first base station is associated with a first universal subscriber identity module; receiving, from the first base station, a rejection message indicating at least a partial rejection of the first gap request; and transmitting, to the first base station, a second message indicating a second gap request for the second universal subscriber identity module, wherein the second message is transmitted after receiving the rejection message.
  • the first base station comprises means for: receiving the first message from the terminal device; transmitting the rejection message to the terminal device; and receiving the second message from the terminal device.
  • a system comprising at least a terminal device and a first base station.
  • the terminal device is configured to: transmit, to the first base station, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station, wherein the first base station is associated with a first universal subscriber identity module; receive, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocate one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • the base station is configured to: receive the first message from the terminal device; and transmit the second message to the terminal device.
  • a system comprising at least a terminal device and a first base station.
  • the terminal device comprises means for: transmitting, to the first base station, a first message comprising a first gap request for requesting a gap pattern for a second universal subscriber identity module associated with a second base station, wherein the first base station is associated with a first universal subscriber identity module; receiving, from the first base station, a second message indicating a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request; and allocating one or more portions of the reduced gap pattern to one or more carriers and/or one or more cells.
  • the base station comprises means for: receiving the first message from the terminal device; and transmitting the second message to the terminal device.
  • FIG. 1 illustrates an exemplary embodiment of a cellular communication network
  • FIG. 2 illustrates a signaling diagram for an example scenario, wherein a gap request for idle mode paging monitoring is rejected by the network;
  • FIG. 3 illustrates a signaling diagram for an example scenario, wherein a gap request for radio resource management measurements is rejected or partially accepted by the network;
  • FIGS. 4-9 illustrate signaling diagrams according to some exemplary embodiments
  • FIGS. 10-13 illustrate flow charts according to some exemplary embodiments
  • FIGS. 14-15 illustrate apparatuses according to some exemplary embodiments.
  • exemplary embodiments will be described using, as an example of an access architecture to which the exemplary embodiments may be applied, a radio access architecture based on long term evolution advanced (LTE Advanced, LTE-A) or new radio (NR, 5G), without restricting the exemplary embodiments to such an architecture, however. It is obvious for a person skilled in the art that the exemplary embodiments may also be applied to other kinds of communications networks having suitable means by adjusting parameters and procedures appropriately.
  • LTE Advanced long term evolution advanced
  • NR new radio
  • UMTS universal mobile telecommunications system
  • UTRAN radio access network
  • LTE long term evolution
  • Wi-Fi wireless local area network
  • WiMAX wireless local area network
  • Bluetooth® personal communications services
  • PCS personal communications services
  • WCDMA wideband code division multiple access
  • UWB ultra-wideband
  • sensor networks mobile ad-hoc networks
  • IMS Internet Protocol multimedia subsystems
  • FIG. 1 depicts examples of simplified system architectures showing some elements and functional entities, all being logical units, whose implementation may differ from what is shown.
  • the connections shown in FIG. 1 are logical connections; the actual physical connections may be different. It is apparent to a person skilled in the art that the system may also comprise other functions and structures than those shown in FIG. 1.
  • FIG. 1 shows a part of an exemplifying radio access network.
  • FIG. 1 shows user devices 100 and 102 configured to be in a wireless connection on one or more communication channels in a cell with an access node (such as (e/g)NodeB) 104 providing the cell.
  • the physical link from a user device to a (e/g)NodeB may be called uplink or reverse link and the physical link from the (e/g)NodeB to the user device may be called downlink or forward link.
  • (e/g)NodeBs or their functionalities may be implemented by using any node, host, server or access point etc. entity suitable for such a usage.
  • a communication system may comprise more than one (e/g)NodeB, in which case the (e/g)NodeBs may also be configured to communicate with one another over links, wired or wireless, designed for the purpose. These links may be used for signaling purposes.
  • the (e/g) NodeB may be a computing device configured to control the radio resources of communication system it is coupled to.
  • the NodeB may also be referred to as a base station, an access point or any other type of interfacing device including a relay station capable of operating in a wireless environment.
  • the (e/g) NodeB may include or be coupled to transceivers. From the transceivers of the (e/g)NodeB, a connection may be provided to an antenna unit that establishes bi-directional radio links to user devices.
  • the antenna unit may comprise a plurality of antennas or antenna elements.
  • the (e/g) NodeB may further be connected to core network 110 (CN or next generation core NGC).
  • core network 110 CN or next generation core NGC.
  • the counterpart on the CN side may be a serving gateway (S-GW, routing and forwarding user data packets), packet data network gateway (P-GW), for providing connectivity of user devices (UEs) to external packet data networks, or mobile management entity (MME), etc.
  • S-GW serving gateway
  • P-GW packet data network gateway
  • MME mobile management entity
  • the user device (also called UE, user equipment, user terminal, terminal device, etc.) illustrates one type of an apparatus to which resources on the air interface may be allocated and assigned, and thus any feature described herein with a user device may be implemented with a corresponding apparatus, such as a relay node.
  • a relay node may be a layer 3 relay (self- backhauling relay) towards the base station.
  • the self-backhauling relay node may also be called an integrated access and backhaul (IAB) node.
  • the IAB node may comprise two logical parts: a mobile termination (MT) part, which takes care of the backhaul link(s) (i.e.
  • a donor node also known as a parent node
  • DU distributed unit
  • the user device may refer to a portable computing device that includes wireless mobile communication devices operating with or without a subscriber identity module (SIM), including, but not limited to, the following types of devices: a mobile station (mobile phone), smartphone, personal digital assistant (PDA), handset, device using a wireless modem (alarm or measurement device, etc.), laptop and/or touch screen computer, tablet, game console, notebook, and multimedia device.
  • SIM subscriber identity module
  • a user device may also be a nearly exclusive uplink only device, of which an example may be a camera or video camera loading images or video clips to a network.
  • a user device may also be a device having capability to operate in Internet of Things (IoT) network which is a scenario in which objects may be provided with the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.
  • IoT Internet of Things
  • the user device may also utilize cloud.
  • a user device may comprise a small portable device with radio parts (such as a watch, earphones or eyeglasses) and the computation may be carried out in the cloud.
  • the user device (or in some exemplary embodiments a layer 3 relay node) may be configured to perform one or more of user equipment functionalities.
  • the user device may also be called a subscriber unit, mobile station, remote terminal, access terminal, user terminal, terminal device, or user equipment (UE) just to mention but a few names or apparatuses.
  • CPS cyber physical system
  • ICT devices sensors, actuators, processors microcontrollers, etc.
  • Mobile cyber physical systems in which the physical system in question may have inherent mobility, are a subcategoiy of cyber-physical systems. Examples of mobile physical systems include mobile robotics and electronics transported by humans or animals.
  • apparatuses have been depicted as single entities, different units, processors and/or memory units (not all shown in FIG. 1) may be implemented.
  • 5G may enable using multiple input - multiple output (MIMO) antennas, many more base stations or nodes than the LTE (a so-called small cell concept), including macro sites operating in co-operation with smaller stations and employing a variety of radio technologies depending on service needs, use cases and/or spectrum available.
  • 5G mobile communications may support a wide range of use cases and related applications including video streaming, augmented reality, different ways of data sharing and various forms of machine type applications (such as (massive) machine-type communications (mMTC), including vehicular safety, different sensors and real-time control.
  • 5G may be expected to have multiple radio interfaces, namely below 6GHz, cmWave and mmWave, and also being integrable with existing legacy radio access technologies, such as the LTE.
  • Integration with the LTE may be implemented, at least in the early phase, as a system, where macro coverage may be provided by the LTE, and 5G radio interface access may come from small cells by aggregation to the LTE.
  • 5G may support both inter-RAT operability (such as LTE-5G) and inter-Rl operability (inter-radio interface operability, such as below 6GHz - cmWave, below 6GHz - cmWave - mmWave).
  • inter-RAT operability such as LTE-5G
  • inter-Rl operability inter-radio interface operability, such as below 6GHz - cmWave, below 6GHz - cmWave - mmWave.
  • One of the concepts considered to be used in 5G networks may be network slicing in which multiple independent and dedicated virtual sub networks (network instances) may be created within the substantially same infrastructure to run services that have different requirements on latency, reliability, throughput and mobility.
  • the current architecture in LTE networks may be fully distributed in the radio and fully centralized in the core network.
  • the low latency applications and services in 5G may need to bring the content close to the radio which leads to local break out and multi-access edge computing (MEC).
  • 5G may enable analytics and knowledge generation to occur at the source of the data. This approach may need leveraging resources that may not be continuously connected to a network such as laptops, smartphones, tablets and sensors.
  • MEC may provide a distributed computing environment for application and service hosting. It may also have the ability to store and process content in close proximity to cellular subscribers for faster response time.
  • Edge computing may cover a wide range of technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, cooperative distributed peer-to-peer ad hoc networking and processing also classifiable as local cloud/fog computing and grid/mesh computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomic self-healing networks, remote cloud services, augmented and virtual reality, data caching, Internet of Things (massive connectivity and/or latency critical), critical communications (autonomous vehicles, traffic safety, real time analytics, time-critical control, healthcare applications).
  • the communication system may also be able to communicate with other networks, such as a public switched telephone network or the Internet 112, or utilize services provided by them.
  • the communication network may also be able to support the usage of cloud services, for example at least part of core network operations may be carried out as a cloud service (this is depicted in FIG. 1 by “cloud” 114).
  • the communication system may also comprise a central control entity, or a like, providing facilities for networks of different operators to cooperate for example in spectrum sharing.
  • Edge cloud may be brought into radio access network (RAN) by utilizing network function virtualization (NFV) and software defined networking (SDN).
  • RAN radio access network
  • NFV network function virtualization
  • SDN software defined networking
  • Using edge cloud may mean access node operations to be carried out, at least partly, in a server, host or node operationally coupled to a remote radio head or a radio unit (RU), or a base station comprising radio parts. It may also be possible that node operations will be distributed among a plurality of servers, nodes or hosts.
  • Carrying out the RAN real-time functions at the RAN side (in a distributed unit, DU 104) and non-real time functions in a centralized manner (in a central unit, CU 108) may be enabled for example by application of cloudRAN architecture.
  • 5G (or new radio, NR) networks may be designed to support multiple hierarchies, where MEC servers may be placed between the core and the base station or nodeB (gNB). It should be appreciated that MEC may be applied in 4G networks as well.
  • 5G may also utilize satellite communication to enhance or complement the coverage of 5G service, for example by providing backhauling.
  • Possible use cases may be providing service continuity for machine-to-machine (M2M) or Internet of Things (IoT) devices or for passengers on board of vehicles, or ensuring service availability for critical communications, and future railway/maritime/aeronautical communications.
  • Satellite communication may utilize geostationary earth orbit (GEO) satellite systems, but also low earth orbit (LEO) satellite systems, in particular mega-constellations (systems in which hundreds of (nano)satellites are deployed).
  • GEO geostationary earth orbit
  • LEO low earth orbit
  • At least one satellite 106 in the mega constellation may cover several satellite-enabled network entities that create on ground cells.
  • the on-ground cells maybe created through an on-ground relay node 104 or by a gNB located on-ground or in a satellite.
  • the depicted system is only an example of a part of a radio access system and in practice, the system may comprise a plurality of (e/g)NodeBs, the user device may have an access to a plurality of radio cells and the system may also comprise other apparatuses, such as physical layer relay nodes or other network elements, etc. At least one of the (e/g)NodeBs or may be a Home(e/g)nodeB.
  • the (e/g)nodeB or base station may also be split into: a radio unit (RU) comprising a radio transceiver (TRX), i.e. a transmitter (TX) and a receiver (RX); one or more distributed units (DUs) that may be used for the so- called Layer 1 (LI) processing and real-time Layer 2 (L2) processing; and a central unit (CU) or a centralized unit that may be used for non-real-time L2 and Layer 3 (L3) processing.
  • the CU may be connected to the one or more DUs for example by using an FI interface.
  • the CU and DU together may also be referred to as baseband or a baseband unit (BBU).
  • BBU baseband unit
  • the CU and DU may also be comprised in a radio access point (RAP).
  • RAP radio access point
  • the CU may be defined as a logical node hosting higher layer protocols, such as radio resource control (RRC), service data adaptation protocol (SDAP) and/or packet data convergence protocol (PDCP), of the (e/g)nodeB or base station.
  • the DU may be defined as a logical node hosting radio link control (RLC), medium access control (MAC) and/or physical (PHY) layers of the (e/g)nodeB or base station.
  • the operation of the DU may be at least partly controlled by the CU.
  • the CU may comprise a control plane (CU-CP), which may be defined as a logical node hosting the RRC and the control plane part of the PDCP protocol of the CU for the (e/g)nodeB or base station.
  • the CU may further comprise a user plane (CU-UP), which may be defined as a logical node hosting the user plane part of the PDCP protocol and the SDAP protocol of the CU for the (e/g)nodeB or
  • Cloud computing platforms may also be used to run the CU and/or DU.
  • the CU may run in a cloud computing platform, which may be referred to as a virtualized CU (vCU).
  • vCU virtualized CU
  • vDU virtualized DU
  • the DU may use so-called bare metal solutions, for example application-specific integrated circuit (ASIC) or customer-specific standard product (CSSP) system-on-a-chip (SoC) solutions.
  • ASIC application-specific integrated circuit
  • CSSP customer-specific standard product
  • SoC system-on-a-chip
  • Radio cells may be macro cells (or umbrella cells) which may be large cells having a diameter of up to tens of kilometers, or smaller cells such as micro-, femto- or picocells.
  • the (e/g)NodeBs of FIG. 1 may provide any kind of these cells.
  • a cellular radio system may be implemented as a multilayer network including several kinds of cells. In multilayer networks, one access node may provide one kind of a cell or cells, and thus a plurality of (e/g)NodeBs may be needed to provide such a network structure.
  • a network which may be able to use “plug-and-play” (e/g)NodeBs may include, in addition to Home (e/g)NodeBs (H(e/g)nodeBs), a home node B gateway, or HNB-GW (not shown in FIG. 1).
  • HNB-GW HNB Gateway
  • HNB-GW which may be installed within an operator’s network, may aggregate traffic from a large number of HNBs back to a core network.
  • a subscriber identity module (SIM) card is an integrated circuit that may be used on a UE to store subscriber information for identifying and authenticating subscribers in a network.
  • a universal integrated circuit card (UICC) is a physical card that may be used as a SIM card.
  • An embedded subscriber identity module (eSIM) or an embedded universal integrated circuit card (eUlCC) may also be used to provide an integrated SIM in a UE instead of or in addition to a removable card.
  • the UICC or eUlCC may comprise, for example, a SIM application and/or a universal subscriber identity module (US1M) application.
  • the SIM application may be used for identifying and authenticating subscribers in GSM networks, while the US1M application may be used for identifying and authenticating subscribers in other network types as well.
  • US1M is a software application that may store subscriber-related information and implement the security functions related to authentication and ciphering on the user side.
  • a multi-SIM UE which may also be referred to as a multiple US1M (MUS1M) device, may support two or more USIMs at a time, wherein the multiple USIMs may be from a single mobile network operator or from different mobile network operators.
  • MUS1M device may use common radio and baseband components that are shared among the multiple USIMs.
  • the UE may occasionally check a second network associated with a second US1M, for example to monitor the paging channel, perform signal measurements, or read the system information, and determine if it needs to respond to a paging request from the other network.
  • a MUS1M device may be used for different purposes. For example, separate USIMs may be used for home and roaming, or for office and personal purposes. They may also be used for having different subscription plans for data and voice. With slicing, one US1M maybe used for certain slices, while another US1M may be used for other general services.
  • the behaviour of the MUS1M device with respect to the handling of multiple USIMs may depend on the capabilities of the device relating to concurrent independent RX and/or TX operations as described in the following.
  • a UE comprising a single receiver and a single transmitter i.e. a single RX / single TX device
  • the UE is capable of receiving traffic from one network and transmitting traffic to one network at a time (type 1).
  • a UE comprising two receivers and a single transmitter i.e. a dual RX / single TX device
  • the UE is capable of receiving traffic from two networks at a time, and transmitting to one network at a time (type 2).
  • a UE comprising two receivers and two transmitters i.e. a dual RX / dual TX device
  • the UE is capable of receiving and transmitting to/from two networks at a time (type 3).
  • single RX / single TX MUS1M devices cannot receive paging messages or perform other RRC idle or inactive mode reception activities such as radio resource management (RRM) measurements in one US1M, while being in RRC connected mode in another US1M.
  • RRM radio resource management
  • the network of the idle mode US1M probes the MUS1M device by sending a so-called paging message to the MUS1M device, and the MUS1M device then responds correspondingly.
  • Idle mode paging monitoring refers to the MUS1M device periodically monitoring whether the network is sending any paging messages, while the MUS1M device is in RRC idle mode with the network.
  • the idle mode monitoring may be performed periodically for example at fixed paging occasions (PO), which may have a high priority.
  • PO fixed paging occasions
  • the MUS1M device needs to interrupt its RRC connection with a first network during the time periods, when it has to monitor for paging messages from the second network periodically at the calculated POs.
  • the MUS1M device may request gaps from its connected network corresponding to one US1M to perform activities such as idle mode monitoring in the idle or inactive network corresponding to its other US1M.
  • the gaps refer to time periods, during which the RRC connection to a first network associated with a first US1M is interrupted, thereby not performing any operations such as scheduling of resources, uplink or downlink data transfer, radio link monitoring, radio resource management or other measurements at the first US1M, and the MUS1M device switches to a second network associated with a second US1M, which is in idle or inactive mode, in order to perform operations such as idle mode paging monitoring, reception of system information blocks (SIBs), and/or radio resource management (RRM) measurements for cell selection or re selection.
  • SIBs system information blocks
  • RRM radio resource management
  • the RRM measurements may comprise, for example, channel quality indicator (CQI), reference signal received power (RSRP), reference signal received quality (RSRQ), and/or received signal strength indicator (RSSI) associated with a neighbour cell.
  • CQI channel quality indicator
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • RSSI received signal strength indicator
  • the RRM measurements may also be referred to as radio measurements or cell re-selection measurements herein.
  • a MUS1M device such as a MUSIM-capable UE, which is registered at a first network (NWK-A) and a second network (NWK-B), is in RRC connected mode operation with NWK-A
  • the UE may need to periodically switch to NWK-B for RRC idle mode operations.
  • the idle mode activities which can be managed with periodic gaps, may comprise idle mode paging monitoring at the serving cell, SIB reception, and/or serving cell and neighbour cell RRM measurements of idle mode.
  • the UE may need gaps for example for paging monitoring, SIB reception, and/or serving cell and neighbour cell measurements.
  • the gaps needed for paging monitoring may be determined and fixed by the paging occasion of NWK-B, but this information is not known to NWK-A, whereas the gaps needed for serving cell measurements can be configured by NWK-A depending on the traffic situation and distribution of scheduling gaps.
  • the time needed for the UE to listen to NWK-B may be limited for the above activities in the range of a few sub-frames for a set of radio frames, the UE may request a gap pattern statically at the time of RRC connection instead of notifying the switching for every occurrence.
  • the gap pattern indicates one or more gaps that may be repeated on a periodical basis.
  • the gap pattern may comprise, for example, a length, a periodicity, and/or an offset for the one or more gaps.
  • the UE may include the assistance information for the gap configuration in an existing uplink RRC message instead of a new RRC message for this purpose.
  • the gap configuration may comprise, for example, a length of the gap in time, a periodicity at which the gap repeats, and/or an offset identifying the first subframe in a given gap (i.e. the starting time of the given gap).
  • the gap length, periodicity, and/or offset may be provided as a number of subframes, for example.
  • the length of one subframe may be 1 ms, for example.
  • the network may include the gap configuration in an RRC reconfiguration message. The network may configure reduced gaps compared to those requested by the UE, if the internal constraints of the network do not allow to allocate the full gaps requested by the UE.
  • FIG. 2 illustrates a signaling diagram for an example scenario, wherein a gap request for idle mode paging monitoring is not accepted by the network.
  • a UE 210 comprises at least a first USIM and a second USIM.
  • the UE may be a MUSIM device comprising two or more USIMs.
  • UE-A 211 and UE-B 212 denote the protocol stacks of the UE for the first USIM and the second USIM, respectively.
  • UE-A is in RRC connected mode 201 with a first base station of a first network (NWK-A) 220.
  • UE-B is in RRC idle mode 202 (or RRC inactive mode) with a second base station of a second network (NWK-B) 230.
  • UE-B determines 203 that periodic gaps are needed in order to perform fixed activities such as paging monitoring for NWK-B.
  • UE-A transmits 204 a gap request message to the first base station to request a gap pattern from NWK-A for the paging monitoring on behalf of UE-B.
  • the gap request message 204 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the gap pattern.
  • the first base station may transmit an RRC message to UE-A to reject 205 the gap request, for example due to service-specific restrictions or limitations in NWK-A.
  • the UE may consider the gap request to be rejected, if the UE receives no gap configuration or rejection message from the network within a certain time window after transmitting the gap request.
  • FIG. 3 illustrates a signaling diagram for an example scenario, wherein a gap request for RRM measurements is rejected or partially accepted by the network.
  • a UE 310 comprises at least a first USIM and a second USIM.
  • the UE may be a MUSIM device comprising two or more USIMs.
  • UE-A 311 and UE-B 312 denote the protocol stacks of the UE associated with the first USIM and the second USIM, respectively.
  • UE-A is in RRC connected mode 301 with a first base station of a first network (NWK-A) 320.
  • NWK-A first network
  • UE-B is in RRC idle mode 302 (or RRC inactive mode) with a second base station of a second network (NWK- B) 330.
  • UE-B determines 303 that periodic gaps are needed in order to perform flexible activities such as RRM measurements for NWK-B.
  • UE-A transmits 304 a gap request message to the first base station to request a gap pattern from NWK-A for the RRM measurements on behalf of UE-B.
  • the gap request message 304 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the gap pattern.
  • the first base station may transmit 305-1 an RRC message to UE-A to reject the gap request.
  • the first base station may transmit 305-2, to UE-A, an RRC reconfiguration message comprising a gap configuration with a reduced (i.e. different) gap pattern compared to the requested gap pattern.
  • the reduced gap pattern may also be referred to as a partial acceptance or a partial rejection of the gap request.
  • the reduced gap pattern may comprise a different offset, length, and/or periodicity compared to the desired offset, length, and/or periodicity requested by UE-A.
  • Some exemplary embodiments may provide a solution to address this challenge.
  • FIG. 4 illustrates a signaling diagram according to an exemplary embodiment.
  • the gap pattern requested 404 by UE- A for paging monitoring in UE-B is rejected 405 by NWK-A.
  • UE-B then continues to monitor for 406 idle mode paging messages from NWK-B autonomously, and the UE may miss the downlink scheduling during these monitoring occasions.
  • UE-A may retry 407 the gap request on behalf of UE-B for example upon or after a handover in UE-A, or when one of the current services in UE-A is deactivated (i.e. a PDU session is released), or based on a timer.
  • a handover refers to handing over UE-A from the first base station to another base station, for example to a third base station associated with a different cell than the first base station.
  • the UE 400 comprises at least a first US1M and a second US1M.
  • the UE may be a MUS1M device comprising two or more USIMs.
  • UE-A 411 and UE-B 412 denote the protocol stacks of the UE for the first USIM and the second USIM, respectively.
  • UE-A is in RRC connected mode 401 with a first base station of a first network (NWK-A) 420.
  • UE-B is in RRC idle mode 402 (or RRC inactive mode) with a second base station of a second network (NWK-B) 430.
  • UE-B determines 403 that periodic gaps are needed in order to perform fixed activities such as paging monitoring for NWK-B.
  • UE-A transmits 404 a first gap request message to the first base station to request a gap pattern from NWK-A for the paging monitoring on behalf of UE-B.
  • the first gap request message 404 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the gap pattern.
  • the first base station transmits an RRC message to UE-A to reject 405 the gap request of the first gap request message 404.
  • UE-B continues to monitor 406 for idle mode paging from NWK-B autonomously, and the UE may miss the downlink scheduling during these occasions.
  • UE-A transmits 407 a second gap request message to the first base station in order to retry requesting the periodic gaps from NWK-A.
  • the second gap request message 407 may be, for example, an RRC assistance information message or a dedicated RRC message comprising substantially the same offset, length, and/or periodicity for the gaps as requested in the first gap request message 404.
  • the second gap request message may comprise a repeat of the first gap request message.
  • the second gap request message 407 may be transmitted, for example, upon or after a handover in UE-A, or when one of the current services in UE-A is deactivated (i.e. a PDU session is released), or based on a timer. If a handover is performed for UE-A, then the second gap request message 407 may be transmitted to a third base station instead of or in addition to the first base station. The first base station or the third base station may transmit 408 an RRC message to UE-A to accept the gap request of the second gap request message 407. UE-B may then use the gap pattern for paging monitoring for NWK-B.
  • FIG. 5 illustrates a signaling diagram according to another exemplary embodiment.
  • the gaps requested 504 by UE-A for paging monitoring in UE-B are rejected 505 by NWK-A.
  • UE-B is then transitioned 506 to an out-of-service state 506, since UE-B has no radio resources for the paging monitoring, and hence UE-B is not able to communicate with NWK-B.
  • the out-of- service state may indicate that NWK-B is not available to UE-B.
  • UE-A may retry 507 the gap request on behalf of UE-B for example upon or after a handover in UE-A, or when one of the current services in UE-A is deactivated (i.e. a PDU session is released), or based on a timer.
  • aUE 510 comprises at least a first USIM and a second USIM.
  • the UE may be a MUSIM device comprising two or more USIMs.
  • UE-A 511 and UE-B 512 denote the protocol stacks of the UE for the first USIM and the second USIM, respectively.
  • UE-A is in RRC connected mode 501 with a first base station of a first network (NWK-A) 520.
  • UE-B is in RRC idle mode 502 (or RRC inactive mode) with a second base station of a second network (NWK-B) 530.
  • UE-B determines 503 that periodic gaps are needed in order to perform fixed activities such as paging monitoring for NWK-B.
  • UE-A transmits 504 a first gap request message to the first base station to request a gap pattern from NWK-A for the paging monitoring on behalf of UE-B.
  • the first gap request message 504 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the gap pattern.
  • the first base station transmits an RRC message to UE-A to reject 505 the gap request of the first gap request message 504.
  • UE-B is assigned 506 to an out- of-service state.
  • the UE-A transmits 507 a second gap request message to the first base station in order to retry requesting the gap pattern from NWK-A.
  • the second gap request message 507 maybe, for example, an RRC assistance information message or a dedicated RRC message comprising substantially the same offset, length, and/or periodicity for the gap pattern as the first gap request message 504.
  • the second gap request message may comprise a repeat of the first gap request message.
  • the second gap request message 507 may be transmitted, for example, upon or after a handover in UE-A, or when one of the current services in UE-A is deactivated (i.e. a PDU session is released), or based on a timer.
  • the second gap request message 507 may be transmitted to a third base station instead of or in addition to the first base station.
  • the first base station or the third base station may transmit 508 an RRC message to UE-A to accept the gap request of the second gap request message 507.
  • UE-B may then use the gap pattern for paging monitoring for NWK-B.
  • FIG. 6 illustrates a signaling diagram according to another exemplary embodiment.
  • the gaps requested 604 by UE-A for RRM measurements in UE-B are rejected 605 by NWK-A.
  • UE-B then remains 606 in service in the serving cell.
  • UE-A may retry 607 the gap request on behalf of UE-B for example upon or after a handover in UE-A, or when one of the current services in UE-A is deactivated (i.e. a PDU session is released), or based on a timer.
  • a UE 610 comprises at least a first USIM and a second USIM.
  • the UE may be a MUSIM device comprising two or more USIMs.
  • UE-A 611 and UE-B 612 denote the protocol stacks of the UE for the first USIM and the second USIM, respectively.
  • UE-A is in RRC connected mode 601 with a first base station of a first network (NWK-A) 620.
  • UE-B is in RRC idle mode 602 (or RRC inactive mode) with a second base station of a second network (NWK-B) 630.
  • UE-B determines 603 that periodic gaps are needed in order to perform flexible activities such as RRM measurements for NWK-B.
  • UE-A transmits 604 a first gap request message to the first base station to request a gap pattern from NWK-A for the RRM measurements on behalf of UE-B.
  • the first gap request message 604 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the gap pattern.
  • the first base station transmits 605 an RRC message to UE-A to reject the gap request of the first gap request message.
  • UE-B remains 606 in the serving cell of UE-B.
  • the UE-A transmits 607 a second gap request message to the first base station in order to retry requesting the gap pattern from NWK-A.
  • the second gap request message 607 may be, for example, an RRC assistance information message or a dedicated RRC message comprising substantially the same offset, length, and/or periodicity for the gap pattern as the first gap request message 604.
  • the second gap request message 607 may be transmitted, for example, upon or after a handover in UE-A, or when one of the current services in UE-A is deactivated (i.e. a PDU session is released), or based on a timer.
  • the second gap request message 607 may be transmitted to a third base station instead of or in addition to the first base station.
  • the first base station or the third base station may transmit 608 an RRC message to UE-A to accept the gap request of the second gap request message 607.
  • UE-B may then use the gap pattern for RRM measurements for NWK-B.
  • FIG. 7 illustrates a signaling diagram according to another exemplary embodiment, wherein UE-A may retry with a request for a shorter gap pattern (i.e. with a reduced gap length and/or periodicity) from NWK-A.
  • the requested shorter gap may still be sufficient to perform the RRM measurements with the highest priority in UE-B, for example for the serving cell and one or more neighbour cells with a higher recent RSRP and/or RSRQ level.
  • a UE 710 comprises at least a first US1M and a second US1M.
  • the UE may be a MUS1M device comprising two or more USIMs.
  • UE-A 711 and UE-B 712 denote the protocol stacks of the UE for the first US1M and the second US1M, respectively.
  • UE-A is in RRC connected mode 701 with a first base station of a first network (NWK-A) 720.
  • UE-B is in RRC idle mode 702 (or RRC inactive mode) with a second base station of a second network (NWK-B) 730.
  • UE-B determines 703 that periodic gaps are needed in order to perform flexible activities such as RRM measurements for NWK-B.
  • UE-A transmits 704 a first gap request message to the first base station to request a gap pattern from NWK-A for the RRM measurements on behalf of UE-B.
  • the first gap request message 704 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the gap pattern.
  • the first base station transmits 705 an RRC message to UE-A to reject the gap request of the first gap request message.
  • UE-A transmits 706 a second gap request message to the first base station in order to request a reduced gap pattern from NWK-A in comparison to the first gap request message.
  • the second gap request message 706 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a reduced length and/or periodicity compared to the gap pattern requested in the first gap request message 704.
  • the first base station may transmit 707 an RRC message to UE-A to accept the reduced gap pattern of the second gap request message 706.
  • UE-B may then use the reduced gap pattern for RRM measurements for NWK-B.
  • the UE may determine that the first gap request is rejected, and the UE takes further actions accordingly (for example as described above with reference to FIGS. 4-7).
  • no explicit rejection message 405, 505, 605, 705 from NWK-A may be needed in some exemplary embodiments in order for UE-A to determine that the first gap request is rejected by NWK-A.
  • FIG. 8 illustrates a signaling diagram according to another exemplary embodiment.
  • the gaps requested 804 by UE-A for RRM measurements (i.e. cell re-selection measurements) in UE-B are partially accepted 805 by NWK-A, i.e. the network provides a gap configuration with reduced gaps for the measurements in UE-B.
  • UE-B may then divide 807, or share, the available gaps among at least some of its carriers (i.e. carrier frequencies) and/or neighbour cells. For example, UE-B may divide the gaps by giving a higher priority (i.e. a higher portion of the gaps) to the carriers and/or cells that it has identified 806 to have a higher probability to be the next serving cell and/or carrier (i.e. a cell and/or carrier with a higher priority to be re-selected).
  • a higher priority i.e. a higher portion of the gaps
  • a UE 810 comprises at least a first USIM and a second USIM.
  • the UE may be a MUSIM device comprising two or more USIMs.
  • UE-A 811 and UE-B 812 denote the protocol stacks of the UE for the first USIM and the second USIM, respectively.
  • UE-A is in RRC connected mode 801 with a first base station of a first network (NWK-A) 820.
  • UE-B is in RRC idle mode 802 (or RRC inactive mode) with a second base station of a second network (NWK-B) 830.
  • UE-B determines 803 that periodic gaps are needed in order to perform flexible activities such as RRM measurements for NWK-B.
  • UE-A transmits 804 a gap request message to the first base station to request a first gap pattern from NWK-A for the RRM measurements on behalf of UE-B.
  • the gap request message 804 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the first gap pattern.
  • the first base station transmits 805, to UE-A, an RRC reconfiguration message comprising a gap configuration with a reduced (i.e. different) gap pattern compared to the requested gap pattern.
  • the gap configuration may comprise a different offset, length, and/or periodicity compared to the desired offset, length, and/or periodicity requested by UE-A in the gap request message 804.
  • UE-B identifies 806 one or more cells and/or one or more carriers with a higher probability to be the next serving cell and/or carrier.
  • the one or more cells and/or the one or more carriers may be identified, for example, based on the mobility history information of UE-B.
  • the mobility history information may comprise handovers and cell re-selections associated with UE-B.
  • the mobility history information may also comprise the time that UE-B has spent in a given cell. As an example, if UE-B is in a first cell and the mobility history information indicates that UE-B has moved to a second cell from the first cell in the past, then the second cell may be given a higher priority compared to other cells.
  • a mapping of the UE-A radio measurements to UE-B’s neighbour cell availability or strength may be used to determine the probability to be the next serving cell and/or carrier, since UE-B has access to the UE-A radio measurements.
  • UE-B may calculate the probability to be the next serving cell and/or carrier based on current radio measurements and an absolute cell re-selection priority.
  • UE-B then divides 807, or shares, the available gaps indicated by the gap configuration by giving a higher priority to the identified one or more cells and/or the identified one or more carriers. For example, UE-B may utilize a higher portion of the gaps to higher priority radio measurements, and reduce the gap portion utilized for lower priority radio measurements. The gap portion for the lower priority radio measurements may even be reduced down to 0 %, which results in skipping some low priority radio measurements for some carriers and/or neighbour cells, if it determines that the probability of those carriers and/or neighbour cells being the next serving cell and/or carrier is zero, or at least close to zero.
  • UE-B may divide 807 the reduced gaps by providing a higher portion of the reduced gaps to higher priority frequencies than to lower priority frequencies.
  • the higher priority frequencies and the lower priority frequencies refer to frequencies used for neighbour cell detection. However, if higher priority frequencies are not detected, then UE-B may provide a higher portion of the reduced gaps for lower priority frequencies.
  • UE-B may identify 806 the one or more cells and/or one or more carriers with a higher probability to be the next serving cell and/or carrier based on a ranking factor.
  • UE-B may allocate the gap portions based on one or more ranking factors.
  • a first ranking factor which may be referred to as a distance factor
  • RSRQ RSRQ
  • a second ranking factor which may be referred to as a variance factor
  • the variance factor may indicate a difference between two radio measurements of the cell from different time instants.
  • one of the cell re-selection criteria may be S n > Thresh x High .
  • the criteria may be based on serving cell radio measurements S serv ⁇ Thresh Serving Low and neighbour cell radio measurements S n > Thresh XLow .
  • the distance factor for a higher priority cell may be determined as the difference between a radio measurement associated with the cell and a threshold value indicating a target for the radio measurement:
  • the distance factor for a lower priority cell may be determined as:
  • the distance factor for an intra-frequency or equal priority neighbour cell may be determined as the difference between two radio measurements associated with two different cells, wherein the radio measurements may be from the substantially same time instant:
  • S n is the measured radio measurement value (for example RSRP or RSRQ) of the neighbour cell.
  • S serv is the measured radio measurement value (for example RSRP or RSRQ) of the serving cell.
  • Thresh XHigfl is a threshold value for the RSRP or RSRQ used by the UE, when re-selecting towards a higher priority RAT and/or frequency than the current serving frequency.
  • Thresh x Low is a threshold value for the RSRP or RSRQ used by the UE, when re selecting towards a lower priority RAT and/or frequency than the current serving frequency.
  • Thresh Serving Low is a threshold value for the RSRP or RSRQ used by the UE on the serving cell, when re-selecting towards a lower priority RAT and/or frequency.
  • a variance factor (denoted as a) may be used, wherein the variance factor indicates a difference between a current and a previous radio measurement associated with the cell.
  • an adjusted distance factor may be determined based on the variance factor, for example as: adjustedDistanceF actor
  • the probability to be the next serving cell may be determined based at least partly on the “distance” from the re-selection criteria adjusted with the variance factor.
  • FIG. 9 illustrates a signaling diagram according to another exemplary embodiment.
  • the first gap request 904 is rejected 905 by NWK-A, and UE-A retries 906 the gap request by requesting reduced gaps compared to the first gap request.
  • NWK-A accepts 907 the request for the reduced gaps.
  • UE-B may then allocate 909, or share, the available gaps among at least some of its carriers and/or neighbour cells. For example, UE-B may divide the reduced gaps by giving a higher priority (i.e. a higher portion of the gaps) to the cells and/or carriers that it has identified 908 to have a higher probability to be the next serving cell and/or carrier (i.e. a cell and/or carrier with a higher priority to be re selected).
  • a higher priority i.e. a higher portion of the gaps
  • a UE 910 comprises at least a first US1M and a second US1M.
  • the UE may be a MUS1M device comprising two or more USIMs.
  • UE-A 911 and UE-B 912 denote the protocol stacks of the UE for the first US1M and the second US1M, respectively.
  • UE-A is in RRC connected mode 901 with a first base station of a first network (NWK-A) 920.
  • UE-B is in RRC idle mode 902 (or RRC inactive mode) with a second base station of a second network (NWK-B) 930.
  • UE-B determines 903 that periodic gaps are needed in order to perform flexible activities such as RRM measurements for NWK-B.
  • UE-A transmits 904 a first gap request message to the first base station to request a first gap pattern from NWK-A for the RRM measurements on behalf of UE-B.
  • the first gap request message 904 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a desired offset, length, and/or periodicity for the first gap pattern.
  • the first base station transmits 905 an RRC message to UE-A to reject the gap request of the first gap request message.
  • the UE-A transmits 906 a second gap request message to the first base station in order to request a second gap pattern with reduced periodic gaps from NWK-A in comparison to the first gap request message.
  • the second gap request message 906 may be, for example, an RRC assistance information message or a dedicated RRC message comprising a reduced length and/or periodicity compared to the first gap request message 904.
  • the first base station transmits 907 an RRC message to UE-A to accept the reduced gaps of the second gap request message 906.
  • UE-B identifies 908 one or more cells and/or one or more carriers with a higher probability to be the next serving cell and/or carrier. UE-B then allocates 909, or shares, the available gaps by giving a higher priority to the identified one or more cells and/or the one or more carriers. For example, UE-B may utilize a higher portion of the gaps to higher priority measurements and reduce the gap portion utilized for lower priority measurements.
  • the second gap request message 906 may comprise a retry of the first gap request message 905 (instead of requesting reduced gaps compared to the first gap request message).
  • the first base station may partially accept the second gap request message and transmit an RRC reconfiguration message with a reduced gap configuration to UE- A.
  • UE-B may then take actions for example as described above with reference to blocks 908 and 909 of FIG. 9.
  • FIG. 10 illustrates a flow chart according to another exemplary embodiment.
  • NWK-A When NWK-A partially accepts the gap request by providing a reduced gap configuration, UE-B may inform 1001 NWK-B about the reduction in gaps. UE-B may then receive 1002 an indication, for example comprising a gap portion and/or exclusion list, from NWK-B indicating how to allocate the reduced gaps.
  • the gap portion list may indicate the gap portions to be allocated among the frequencies and/or cells for the re-selection measurements.
  • the gap exclusion list may indicate certain frequencies and/or cells that are excluded from the re selection measurements.
  • UE-B may receive information from NWK-B about the gap portion to be allocated for the frequencies and/or cells, and/or certain frequencies and/or cells that are excluded from the re-selection measurements.
  • NWK-B may pre-configure UE-B with instructions on how to allocate the gap portions before UE-B moves from the RRC connected mode to RRC idle or inactive mode.
  • NWK-A may configure a prohibit timer to prevent the gap requests from UE-A for a pre-defined time interval.
  • the prohibit timer may be used to prevent UE-A from retrying the gap requests too frequently in order to avoid wasting radio resources, for example if NWK-A knows that it cannot accept the gap request at least during the time interval of the prohibit timer.
  • NWK-A may indicate the prohibit timer to the UE for example in an RRC message indicating a rejection for a gap request received from UE-A, or in any other RRC message such as an RRC reconfiguration message transmitted from NWK-A to the UE before the rejection.
  • the prohibit timer may be configured to the UE by default, i.e. without an explicit configuration message from the network.
  • the prohibit timer may be stopped, when one or more services in UE-A are released, or when UE-A is handed over to a new cell by NWK-A.
  • a retry timer may be provided from NWK-A to the UE in order for UE-A to retry the gap request at pre-defined time intervals according to the retry timer until the gap request is accepted by NWK-A.
  • NWK-A may indicate the retry timer to the UE for example in an RRC message indicating a rejection for a gap request received from UE-A, or in any other RRC message such as an RRC reconfiguration message transmitted from NWK-A to the UE before the rejection.
  • the retry timer may be configured to the UE by default, i.e. without an explicit configuration message from the network.
  • FIG. 11 illustrates a flow chart according to another exemplary embodiment.
  • the functions illustrated in FIG. 11 may be performed by an apparatus such as, or comprised in, a UE or a MUSIM device.
  • a first message is transmitted 1101 to a first base station associated with a first USIM, wherein the first message comprises a first gap request for requesting a gap pattern for a second USIM associated with a second base station.
  • the first USIM and the second USIM are also associated with the apparatus.
  • the first USIM and the second USIM may be comprised in the apparatus, or in the UE or MUSIM device that the apparatus is comprised in.
  • a second message is transmitted 1102 to the base station, wherein the second message indicates a second gap request for the second USIM, wherein the second message is transmitted after the first gap request is rejected at least partially.
  • the apparatus may receive a message from the base station explicitly rejecting the first gap request at least partially, or the apparatus may determine that the first gap request is rejected if no response is received to the first gap request within a pre-defined time interval.
  • FIG. 12 illustrates a flow chart according to another exemplary embodiment.
  • the functions illustrated in FIG. 12 may be performed by an apparatus such as, or comprised in, a UE or a MUSIM device.
  • a first message is transmitted 1201 to a first base station associated with a first USIM, wherein the first message comprises a first gap request for requesting a gap pattern for a second USIM associated with a second base station.
  • the first USIM and the second USIM are also associated with the apparatus.
  • the first USIM and the second USIM may be comprised in the apparatus, or in the UE or MUSIM device that the apparatus is comprised in.
  • a second message is received 1202 from the first base station, wherein the second message indicates a reduced gap pattern with a reduced gap length and/or a reduced gap periodicity compared to a requested gap length and/or a requested gap periodicity indicated in the first gap request.
  • One or more portions of the reduced gap pattern is allocated 1203 to one or more carriers and/or one or more cells.
  • FIG. 13 illustrates a flow chart according to another exemplary embodiment.
  • the functions illustrated in FIG. 11 may be performed by an apparatus such as, or comprised in, a base station (for example a gNB).
  • a message indicating a timer is transmitted 1301 to a UE, wherein the timer indicates a time interval for retrying a gap request after the time interval, or for prohibiting the UE from retrying the gap request during the time interval.
  • a technical advantage provided by some exemplary embodiments is that they may enable improved usage of radio resources in both the network and the UE, when the network rejects the gap request received from the UE.
  • some exemplary embodiments may prevent the UE from blindly requesting gaps with a different configuration without any information from the network on which periodicity, length, or offset could be provided.
  • Some exemplary embodiments may also improve cell re-selection performance, when sufficient gaps are not available and a reduced gap configuration is provided by the network.
  • FIG. 14 illustrates an apparatus 1400, which may be an apparatus such as, or comprised in, a terminal device or a MUS1M device according to an exemplary embodiment.
  • a terminal device may also be referred to as a UE or user equipment herein.
  • the apparatus 1400 comprises a processor 1410.
  • the processor 1410 interprets computer program instructions and processes data.
  • the processor 1410 may comprise one or more programmable processors.
  • the processor 1410 may comprise programmable hardware with embedded firmware and may, alternatively or additionally, comprise one or more application-specific integrated circuits (ASICs).
  • ASICs application-specific integrated circuits
  • the processor 1410 is coupled to a memory 1420.
  • the processor is configured to read and write data to and from the memory 1420.
  • the memory 1420 may comprise one or more memory units.
  • the memory units may be volatile or non-volatile. It is to be noted that in some exemplary embodiments there may be one or more units of non-volatile memory and one or more units of volatile memory or, alternatively, one or more units of non-volatile memory, or, alternatively, one or more units of volatile memory.
  • Volatile memory may be for example random-access memory (RAM), dynamic random-access memory (DRAM) or synchronous dynamic random-access memory (SDRAM).
  • Non-volatile memory may be for example read-only memory (ROM), programmable read-only memory (PROM), electronically erasable programmable read-only memory (EEPROM), flash memory, optical storage or magnetic storage.
  • ROM read-only memory
  • PROM programmable read-only memory
  • EEPROM electronically erasable programmable read-only memory
  • flash memory optical storage or magnetic storage.
  • memories may be referred to as non-transitory computer readable media.
  • the memory 1420 stores computer readable instructions that are executed by the processor 1410.
  • non-volatile memory stores the computer readable instructions and the processor 1410 executes the instructions using volatile memory for temporary storage of data and/or instructions.
  • the computer readable instructions may have been pre-stored to the memory 1420 or, alternatively or additionally, they may be received, by the apparatus, via an electromagnetic carrier signal and/or may be copied from a physical entity such as a computer program product. Execution of the computer readable instructions causes the apparatus 1400 to perform one or more of the functionalities described above.
  • a “memory” or “computer-readable media” or “computer-readable medium” may be any non-transitory media or medium or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • the apparatus 1400 may further comprise, or be connected to, an input unit 1430.
  • the input unit 1430 may comprise one or more interfaces for receiving input.
  • the one or more interfaces may comprise for example one or more temperature, motion and/or orientation sensors, one or more cameras, one or more accelerometers, one or more microphones, one or more buttons and/or one or more touch detection units.
  • the input unit 1430 may comprise an interface to which external devices may connect to.
  • the apparatus 1400 may also comprise an output unit 1440.
  • the output unit may comprise or be connected to one or more displays capable of rendering visual content, such as a light emitting diode (LED) display, a liquid crystal display (LCD) and/or a liquid crystal on silicon (LCoS) display.
  • the output unit 1440 may further comprise one or more audio outputs.
  • the one or more audio outputs may be for example loudspeakers.
  • the apparatus 1400 further comprises a connectivity unit 1450.
  • the connectivity unit 1450 enables wireless connectivity to one or more external devices.
  • the connectivity unit 1450 comprises at least one transmitter and at least one receiver that may be integrated to the apparatus 1400 or that the apparatus 1400 may be connected to.
  • the at least one transmitter comprises at least one transmission antenna, and the at least one receiver comprises at least one receiving antenna.
  • the connectivity unit 1450 may comprise an integrated circuit or a set of integrated circuits that provide the wireless communication capability for the apparatus 1400.
  • the wireless connectivity may be a hardwired application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • the connectivity unit 1450 may comprise one or more components such as a power amplifier, digital front end (DFE), analog-to-digital converter (ADC), digital-to-analog converter (DAC), frequency converter, (de) modulator, and/or encoder/decoder circuitries, controlled by the corresponding controlling units.
  • DFE digital front end
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • frequency converter frequency converter
  • de modulator demodulator
  • encoder/decoder circuitries controlled by the corresponding controlling units.
  • apparatus 1400 may further comprise various components not illustrated in FIG. 14.
  • the various components may be hardware components and/or software components.
  • the apparatus 1500 of FIG. 15 illustrates an exemplary embodiment of an apparatus such as, or comprised in, a base station such as a gNB.
  • the apparatus may comprise, for example, a circuitry or a chipset applicable to a base station to realize some of the described exemplary embodiments.
  • the apparatus 1500 may be an electronic device comprising one or more electronic circuitries.
  • the apparatus 1500 may comprise a communication control circuitry 1510 such as at least one processor, and at least one memory 1520 including a computer program code (software) 1522 wherein the at least one memory and the computer program code (software) 1522 are configured, with the at least one processor, to cause the apparatus 1500 to carry out some of the exemplary embodiments described above.
  • the memory 1520 may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and/or removable memory.
  • the memory may comprise a configuration database for storing configuration data.
  • the configuration database may store a current neighbour cell list, and, in some exemplary embodiments, structures of the frames used in the detected neighbour cells.
  • the apparatus 1500 may further comprise a communication interface 1530 comprising hardware and/or software for realizing communication connectivity according to one or more communication protocols.
  • the communication interface 1530 comprises at least one transmitter (TX) and at least one receiver (RX) that may be integrated to the apparatus 1500 or that the apparatus 1500 may be connected to.
  • the communication interface 1530 provides the apparatus with radio communication capabilities to communicate in the cellular communication system.
  • the communication interface may, for example, provide a radio interface to terminal devices.
  • the apparatus 1500 may further comprise another interface towards a core network such as the network coordinator apparatus and/or to the access nodes of the cellular communication system.
  • the apparatus 1500 may further comprise a scheduler 1540 that is configured to allocate resources.
  • circuitry may refer to one or more or all of the following: a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry); and b) combinations of hardware circuits and software, such as (as applicable): i) a combination of analog and/or digital hardware circuit(s) with software/firmware and ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone, to perform various functions); and c) hardware circuit(s) and/or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (for example firmware) for operation, but the software may not be present when it is not needed for operation.
  • hardware-only circuit implementations such as implementations in only analog and/or digital circuitry
  • combinations of hardware circuits and software such as (as applicable): i) a combination of analog and/or digital hardware circuit(s) with software/
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the techniques and methods described herein may be implemented by various means. For example, these techniques may be implemented in hardware (one or more devices), firmware (one or more devices), software (one or more modules), or combinations thereof.
  • the apparatus(es) of exemplary embodiments may be implemented within one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), graphics processing units (GPUs), processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.
  • ASICs application-specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • GPUs graphics processing units
  • processors controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a
  • the implementation can be carried out through modules of at least one chipset (for example procedures, functions, and so on) that perform the functions described herein.
  • the software codes may be stored in a memory unit and executed by processors.
  • the memory unit may be implemented within the processor or externally to the processor. In the latter case, it can be communicatively coupled to the processor via various means, as is known in the art.
  • the components of the systems described herein may be rearranged and/or complemented by additional components in order to facilitate the achievements of the various aspects, etc., described with regard thereto, and they are not limited to the precise configurations set forth in the given figures, as will be appreciated by one skilled in the art.
  • 5G fifth generation ADC: analog-to-digital converter
  • ASIC application-specific integrated circuit
  • BBU baseband unit
  • CN core network
  • CPS cyber-physical system
  • CQ1 channel quality indicator
  • CSSP customer-specific standard product
  • CU central unit
  • CU-CP central unit control plane
  • CU-UP central unit user plane DAC: digital-to-analog converter
  • DFE digital front end
  • DRAM dynamic random-access memory
  • DSP digital signal processor
  • DSPD digital signal processing device DU: distributed unit
  • EEPROM electronically erasable programmable read-only memory
  • eSIM embedded subscriber identity module
  • eUlCC embedded universal integrated circuit card
  • FPGA field programmable gate array
  • GEO geostationary earth orbit
  • gNB next generation nodeB / 5G base station
  • GPU graphics processing unit
  • HNB-GW home node B gateway
  • IMS internet protocol multimedia subsystem
  • L2 Layer 2 L3: Layer 3
  • LCD liquid crystal display
  • LCoS liquid crystal on silicon
  • LED light emitting diode
  • LEO low earth orbit
  • LTE longterm evolution
  • LTE-A long term evolution advanced
  • M2M machine-to-machine
  • MAC medium access control
  • MANET mobile ad-hod network
  • MEC multi-access edge computing MIMO: multiple input and multiple output MME: mobility management entity mMTC: massive machine-type communications MT: mobile termination
  • MUSIM multiple universal subscriber identity module
  • NFV network function virtualization
  • NGC next generation core
  • NR new radio
  • NWK network
  • PCS personal communications services
  • PDA personal digital assistant
  • PDCP packet data convergence protocol
  • PDU protocol data unit
  • P-GW packet data network gateway
  • PLD programmable logic device PO: paging occasion
  • PROM programmable read-only memory RAM: random-access memory
  • RAN radio access network
  • RAP radio access point
  • RAT radio access technology
  • RI radio interface
  • RLC radio link control
  • ROM read-only memory
  • RRC radio resource control
  • RSS1 received signal strength indicator
  • RU radio unit
  • RX receiver
  • SDAP service data adaptation protocol
  • SDN software defined networking
  • SDRAM synchronous dynamic random-access memory
  • S-GW serving gateway SIB: system information block
  • SIM subscriber identity module / subscriber identification module
  • SoC system-on-a-chip
  • TRX transceiver
  • TX transmitter
  • UE user equipment
  • UICC universal integrated circuit card
  • UMTS universal mobile telecommunications system
  • US1M universal subscriber identity module
  • UTRAN UMTS radio access network
  • UWB ultra- wideband vCU: virtualized central unit
  • vDU virtualized distributed unit
  • WCDMA wideband code division multiple access
  • WiMAX worldwide interoperability for microwave access
  • WLAN wireless local area network

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un procédé consistant à transmettre, à une première station de base associée à un premier module d'identité d'abonné universel, un premier message comprenant une première demande d'intervalle visant à demander un motif d'intervalle pour un deuxième module d'identité d'abonné universel associé à une deuxième station de base, est divulgué. Le procédé consiste en outre à transmettre, à la première station de base, un deuxième message indiquant une deuxième demande d'intervalle pour le deuxième module d'identité d'abonné universel, le deuxième message étant transmis après le rejet, au moins partiel, de la première demande d'intervalle.
PCT/EP2022/061305 2021-05-07 2022-04-28 Traitement du rejet ou du rejet partiel d'une demande d'intervalle par un équipement utilisateur WO2022233694A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021031060A1 (fr) * 2019-08-19 2021-02-25 Qualcomm Incorporated Intervalle de planification pour équipement utilisateur multi-sim

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021031060A1 (fr) * 2019-08-19 2021-02-25 Qualcomm Incorporated Intervalle de planification pour équipement utilisateur multi-sim

Non-Patent Citations (3)

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Title
LENOVO ET AL: "Switching Notification in MUSIM", vol. RAN WG2, no. Online; 20201102 - 20201113, 23 October 2020 (2020-10-23), XP051942658, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG2_RL2/TSGR2_112-e/Docs/R2-2009856.zip R2-2009856 Switching Notification in MUSIM v2.2.docx> [retrieved on 20201023] *
NOKIA ET AL: "Remaining issues for MUSIM Gap Configuration", vol. RAN WG2, no. Electronic; 20220117 - 20220125, 11 January 2022 (2022-01-11), XP052093809, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG2_RL2/TSGR2_116bis-e/Docs/R2-2200671.zip R2-2200671-RRC-Remaining issues on Switching-Notification-without-leaving.docx> [retrieved on 20220111] *
VIVO: "[post112-e][256][Multi-SIM] Network switching details (vivo)", vol. RAN WG2, no. Online; 20210125 - 20210205, 10 February 2021 (2021-02-10), XP051977989, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG2_RL2/TSGR2_113-e/Docs/R2-2102262.zip R2-2102262_[post112-e][256][Multi-SIM] Network switching details (vivo).docx> [retrieved on 20210210] *

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