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WO2025209703A1 - Signalisation pour prendre en charge un type 1 de bloc d'informations système sur demande - Google Patents

Signalisation pour prendre en charge un type 1 de bloc d'informations système sur demande

Info

Publication number
WO2025209703A1
WO2025209703A1 PCT/EP2025/053444 EP2025053444W WO2025209703A1 WO 2025209703 A1 WO2025209703 A1 WO 2025209703A1 EP 2025053444 W EP2025053444 W EP 2025053444W WO 2025209703 A1 WO2025209703 A1 WO 2025209703A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
sib1
demand
wake
signal
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
PCT/EP2025/053444
Other languages
English (en)
Inventor
Sankaran BALASUBRAMANIAM
Mohamad SAYED HASSAN
Ahlem KHLASS
Daniela Laselva
Hakon Helmers
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.)
Nokia Technologies Oy
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 WO2025209703A1 publication Critical patent/WO2025209703A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the following example embodiments relate to wireless communication.
  • a second distributed unit controlling a second cell comprising: means for receiving, from a second central unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1 , transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and means for updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a method performed by a second central unit controlling a second cell comprising: transmitting, to a first central unit controlling a first cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of the second cell; and transmitting, to a second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a first central unit controlling a first cell, cause the first central unit to perform at least the following: receiving, from a second central unit controlling a second cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of the second cell; and based on receiving the request, broadcasting the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a second central unit controlling a second cell, cause the second central unit to perform at least the following: transmitting, to a first central unit controlling a first cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of the second cell; and transmitting, to a second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a second distributed unit controlling a second cell, cause the second distributed unit to perform at least the following: receiving, from a second central unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1, transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a computer program comprising instructions which, when executed by a first central unit controlling a first cell, cause the first central unit to perform at least the following: receiving, from a second central unit controlling a second cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1, of the second cell; and based on receiving the request, broadcasting the configuration information associated with the wakeup signal for requesting the on-demand SIB1 of the second cell.
  • a computer program comprising instructions which, when executed by a second central unit controlling a second cell, cause the second central unit to perform at least the following: transmitting, to a first central unit controlling a first cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1, of the second cell; and transmitting, to a second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a computer program comprising instructions which, when executed by a second distributed unit controlling a second cell, cause the second distributed unit to perform at least the following: receiving, from a second central unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1 , transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a central unit comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the central unit at least to: receive, from a first distributed unit controlling a first cell or from a second distributed unit controlling a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of the second cell; broadcast the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit; and transmit, to the second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a first distributed unit controlling a first cell
  • the first distributed unit comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the first distributed unit at least to: receive, from a central unit, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SI B1 , of a second cell; and broadcast the configuration information on the first cell.
  • a second distributed unit controlling a second cell
  • the second distributed unit comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the second distributed unit at least to: receive, from a central unit, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1, transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and update, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a central unit comprising: means for receiving, from a first distributed unit controlling a first cell or from a second distributed unit controlling a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1, of the second cell; means for broadcasting the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit; and means for transmitting, to the second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a second distributed unit controlling a second cell comprising: means for receiving, from a central unit, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1 , transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and means for updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a method performed by a central unit comprising: receiving, from a first distributed unit controlling a first cell or from a second distributed unit controlling a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of the second cell; broadcasting the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit; and transmitting, to the second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a method performed by a first distributed unit controlling a first cell comprising: receiving, from a central unit, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1, of a second cell; and broadcasting the configuration information on the first cell.
  • a method performed by a second distributed unit controlling a second cell comprising: receiving, from a central unit, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1 , transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a central unit, cause the central unit to perform at least the following: receiving, from a first distributed unit controlling a first cell or from a second distributed unit controlling a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of the second cell; broadcasting the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit; and transmitting, to the second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a first distributed unit controlling a first cell, cause the first distributed unit to perform at least the following: receiving, from a central unit, configuration information associated with a wakeup signal for requesting an on-demand system information block type one, SIB1 , of a second cell; and broadcasting the configuration information on the first cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a second distributed unit controlling a second cell, cause the second distributed unit to perform at least the following: receiving, from a central unit, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1 , transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a computer program comprising instructions which, when executed by a central unit, cause the central unit to perform at least the following: receiving, from a first distributed unit controlling a first cell or from a second distributed unit controlling a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1, of the second cell; broadcasting the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit; and transmitting, to the second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • a computer program comprising instructions which, when executed by a first distributed unit controlling a first cell, cause the first distributed unit to perform at least the following: receiving, from a central unit, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 , of a second cell; and broadcasting the configuration information on the first cell.
  • a computer program comprising instructions which, when executed by a second distributed unit controlling a second cell, cause the second distributed unit to perform at least the following: receiving, from a central unit, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one, SIB1, transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell; and updating, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • a user device comprising at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the user device at least to: receive, from a first cell or from a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 of the second cell; receive, from the first cell or from the second cell, duration information indicating a validity duration of the configuration information associated with the wake-up signal; transmit the wake-up signal based on the configuration information and within the validity duration, wherein the wake-up signal indicates an identifier associated with the second cell; and receive the on- demand SIB1 of the second cell from the first cell or from the second cell.
  • a user device comprising: means for receiving, from a first cell or from a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 of the second cell; means for receiving, from the first cell or from the second cell, duration information indicating a validity duration of the configuration information associated with the wake-up signal; means for transmitting the wake-up signal based on the configuration information and within the validity duration, wherein the wake-up signal indicates an identifier associated with the second cell; and means for receiving the on- demand SIB1 of the second cell from the first cell or from the second cell.
  • a method comprising: receiving, from a first cell or from a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 of the second cell; receiving, from the first cell or from the second cell, duration information indicating a validity duration of the configuration information associated with the wake-up signal; transmitting the wake-up signal based on the configuration information and within the validity duration, wherein the wake-up signal indicates an identifier associated with the second cell; and receiving the on-demand SIB1 of the second cell from the first cell or from the second cell.
  • a non-transitory computer readable medium comprising program instructions which, when executed by a user device, cause the user device to perform at least the following: receiving, from a first cell or from a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SIB1 of the second cell; receiving, from the first cell or from the second cell, duration information indicating a validity duration of the configuration information associated with the wake-up signal; transmitting the wake-up signal based on the configuration information and within the validity duration, wherein the wake-up signal indicates an identifier associated with the second cell; and receiving the on- demand SIB1 of the second cell from the first cell or from the second cell.
  • FIG. 5 illustrates a signal flow diagram
  • FIG. 6 illustrates a signal flow diagram
  • FIG. 7 illustrates a signal flow diagram
  • FIG. 10 illustrates a signal flow diagram
  • FIG. 11 illustrates a signal flow diagram
  • FIG. 14 illustrates a flow chart
  • FIG. 15 illustrates a flow chart
  • FIG. 16 illustrates a flow chart
  • FIG. 17 illustrates a flow chart
  • FIG. 18 illustrates a flow chart
  • FIG. 19 illustrates an apparatus
  • FIG. 20 illustrates an apparatus
  • Some example embodiments described herein may be implemented in a wireless communication network comprising a radio access network based on one or more of the following radio access technologies (RATs): global system for mobile communications (GSM) or any other second generation (2G) radio access technology, universal mobile telecommunication system (UMTS, 3G) based on basic wideband-code division multiple access (W-CDMA), high-speed packet access (HSPA), long term evolution (LTE), LTE-Advanced, fourth generation (4G), fifth generation (5G), 5G new radio (NR), 5G-Advanced (i.e., 3GPP NR Rel-18 and beyond), or sixth generation (6G).
  • RATs radio access technologies
  • GSM global system for mobile communications
  • UMTS universal mobile telecommunication system
  • W-CDMA basic wideband-code division multiple access
  • HSPA high-speed packet access
  • LTE long term evolution
  • LTE-Advanced LTE-Advanced
  • fourth generation (4G) fifth generation
  • 5G new radio (NR) i.e
  • radio access networks include the universal mobile telecommunications system (UMTS) radio access network (UTRAN), the evolved universal terrestrial radio access network (E-UTRA), or the next generation radio access network (NG-RAN).
  • UMTS universal mobile telecommunications system
  • E-UTRA evolved universal terrestrial radio access network
  • NG-RAN next generation radio access network
  • the wireless communication network may further comprise a core network, and some example embodiments may also be applied to network functions of the core network.
  • the embodiments are not restricted to the wireless communication network given as an example, but a person skilled in the art may also apply the solution to other wireless communication networks or systems provided with necessary properties.
  • some example embodiments may also be applied to a communication system based on IEEE 802.11 specifications, or a communication system based on IEEE 802.15 specifications.
  • IEEE is an abbreviation for the Institute of Electrical and Electronics Engineers.
  • FIG. 1 depicts an example of a simplified wireless communication network showing some physical and logical entities.
  • the connections shown in FIG. 1 may be physical connections or logical connections. It is apparent to a person skilled in the art that the wireless communication network may also comprise other physical and logical entities than those shown in FIG. 1.
  • the example wireless communication network shown in FIG. 1 includes a radio access network (RAN) and a core network 110.
  • RAN radio access network
  • core network 110 The example wireless communication network shown in FIG. 1 includes a radio access network (RAN) and a core network 110.
  • FIG. 1 shows user equipment (UE) 100, 102 configured to be in a wireless connection on one or more communication channels in a radio cell with one or more access nodes 104, 104B of a radio access network.
  • UE user equipment
  • the access node 104, 104B may comprise a computing device configured to control the radio resources of the access node 104, 104B and to be in a wireless connection with one or more UEs 100, 102.
  • the access node 104, 104B may also be referred to as a base station, a base transceiver station (BTS), an access point, a cell site, a network node, a radio access network node, or a RAN node.
  • BTS base transceiver station
  • the access node 104, 104B may be, for example, an evolved NodeB (abbreviated as eNB or eNodeB), or a next generation evolved NodeB (abbreviated as ng-eNB), or a next generation NodeB (abbreviated as gNB or gNodeB), providing the radio cell.
  • the access node 104, 104B may include or be coupled to transceivers. From the transceivers of the access node 104, 104B, a connection may be provided to an antenna unit that establishes a bidirectional radio link to one or more UEs 100, 102.
  • the antenna unit may comprise an antenna or antenna element, or a plurality of antennas or antenna elements.
  • the wireless connection (e.g., radio link) from a UE 100, 102 to the access node 104, 104B may be called uplink (UL) or reverse link, and the wireless connection (e.g., radio link) from the access node 104, 104B to the UE 100, 102 may be called downlink (DL) or forward link.
  • UL uplink
  • DL downlink
  • a UE 100 may also communicate directly with another UE 102, and vice versa, via a wireless connection generally referred to as a sidelink (SL).
  • SL sidelink
  • the access node 104, 104B or its functionalities may be implemented by using any node, host, server, access point or other entity suitable for providing such functionalities.
  • the radio access network may comprise more than one access node, in which case the access nodes 104, 104B may also be configured to communicate with one another over wired or wireless links. These links between access nodes may be used for sending and receiving control plane signaling and also for routing data from one access node to another access node.
  • the access node 104, 104B may further be connected to a core network (CN) 110.
  • the core network 110 may comprise an evolved packet core (EPC) network and/or a 5 th generation core network (5GC).
  • the EPC may comprise network entities, such as a serving gateway (S-GW for routing and forwarding data packets), a packet data network gateway (P-GW) for providing connectivity of UEs to external packet data networks, and/or a mobility management entity (MME).
  • the 5GC may comprise one or more network functions, such as at least one of: a user plane function (UPF), an access and mobility management function (AMF), a location management function (LMF), and/or a session management function (SMF).
  • UPF user plane function
  • AMF access and mobility management function
  • LMF location management function
  • SMF session management function
  • 5G wireless communication networks may also apply network slicing, in which multiple independent and dedicated virtual sub-networks (network instances) may be created within the same physical infrastructure to run services that have different requirements on latency, reliability, throughput and mobility.
  • Such an embodiment of the access node 104, 104B may enable the centralization of CUs relative to the cell sites and DUs, whereas DUs may be more distributed and may even remain at cell sites.
  • 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 108, 108B may be a logical node hosting radio resource control (RRC), service data adaptation protocol (SDAP) and/or packet data convergence protocol (PDCP), of the NR protocol stack for an access node 104, 104B.
  • the CU 108, 108B may comprise a control plane (CU-CP), which may be a logical node hosting the RRC and the control plane part of the PDCP protocol of the NR protocol stack for the access node 104, 104B.
  • the CU 108, 108B may further comprise a user plane (CU-UP), which may be a logical node hosting the user plane part of the PDCP protocol and the SDAP protocol of the CU for the access node 104, 104B.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • the DU 105, 105A, 105B may be a logical node hosting radio link control (RLC), medium access control (MAC) and/or physical (PHY) layers of the NR protocol stack for the access node 104, 104B.
  • the operations of the DU 105, 105A, 105B may be at least partly controlled by the CU 108, 108B. It should also be understood that the distribution of functions between the DU 105, 105A, 105B and the CU 108, 108B may vary depending on the implementation.
  • Cloud computing systems may also be used to provide the CU 108, 108B and/or DU 105, 105A, 105B.
  • a CU provided by a cloud computing system may be referred to as a virtualized CU (vCU).
  • vCU virtualized CU
  • vDU virtualized DU
  • the DU may be implemented on so-called bare metal solutions, for example application-specific integrated circuit (ASIC) or customer-specific standard product (CSSP) system-on-a-chip (SoC).
  • ASIC application-specific integrated circuit
  • CSSP customer-specific standard product
  • Edge cloud may be brought into the radio access network by utilizing network function virtualization (NFV) and software defined networking (SDN).
  • 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 computing system operationally coupled to a remote radio head (RRH) or a radio unit (RU) of an access node 104, 104B. It is also possible that access node operations may be performed on a distributed computing system or a cloud computing system located at the access node 104, 104B.
  • cloud RAN architecture enables RAN real-time functions being carried out at the radio access network (e.g., in a DU 105, 105A, 105B), and non-real-time functions being carried out in a centralized manner (e.g., in a CU 108, 108B).
  • 5G (or new radio, NR) wireless communication networks may support multiple hierarchies, where multi-access edge computing (MEC) servers may be placed between the core network 110 and the access node 104, 104B. It should be appreciated that MEC may be applied in LTE wireless communication networks as well.
  • MEC multi-access edge computing
  • a 5G wireless communication network (“5G network”) may also comprise a non-terrestrial communication network, such as a satellite communication network, to enhance or complement the coverage of the 5G radio access network.
  • a non-terrestrial communication network such as a satellite communication network
  • satellite communication may support the transfer of data between the 5G radio access network and the core network 110, enabling more extensive network coverage.
  • Possible use cases may include: providing service continuity for machine-to-machine (M2M) or Internet of Things (loT) devices or for passengers on board of vehicles, or ensuring service availability for critical communications, and future railway, maritime, or aeronautical communications.
  • M2M machine-to-machine
  • LoT Internet of Things
  • Satellite communication may utilize geostationary earth orbit (GEO) satellite systems, but also low earth orbit (LEO) satellite systems, in particular mega-constellations (i.e., systems in which hundreds of (nano)satellites are deployed).
  • GEO geostationary earth orbit
  • LEO low earth orbit
  • a given satellite 106 in the mega-constellation may cover several satellite-enabled network entities that create on-ground cells.
  • the on-ground cells may be created through an on-ground relay access node or by an access node located on-ground or in a satellite.
  • the access node 104, 104B depicted in FIG. 1 is just an example of a part of a radio access network, and in practice the radio access network may comprise a plurality of access nodes 104, 104B, the UEs 100, 102 may have access to a plurality of radio cells, and the radio access network may also comprise other apparatuses, such as physical layer relay access nodes or other entities. At least one of the access nodes may be a Home eNodeB or a Home gNodeB.
  • a Home gNodeB or a Home eNodeB is a type of access node that may be used to provide indoor coverage inside a home, office, or other indoor environment.
  • 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 access node(s) 104, 104B of FIG. 1 may provide any kind of these cells.
  • a cellular radio network may be implemented as a multilayer access networks including several kinds of radio cells. In multilayer access networks, one access node may provide one kind of a radio cell or radio cells, and thus a plurality of access nodes may be needed to provide such a multilayer access network.
  • a radio access network which may be able to use “plug-and-play” access nodes, may include, in addition to Home eNodeBs or Home gNodeBs, a Home Node B gateway (HNB-GW) (not shown in FIG. 1).
  • HNB-GW which may be installed within an operator’s radio access network, may aggregate traffic from a large number of Home eNodeBs or Home gNodeBs back to a core network 110 of the operator.
  • 6G wireless communication networks are expected to adopt flexible decentralized and/or distributed computing systems and architecture and ubiquitous computing, with local spectrum licensing, spectrum sharing, infrastructure sharing, and intelligent automated management underpinned by mobile edge computing, artificial intelligence, short-packet communication and blockchain technologies.
  • Key features of 6G may include intelligent connected management and control functions, programmability, integrated sensing and communication, reduction of energy footprint, trustworthy infrastructure, scalability and affordability.
  • 6G is also targeting new use cases covering the integration of localization and sensing capabilities into system definition to unifying user experience across physical and digital worlds.
  • NES network energy savings
  • Some techniques for enabling network energy savings may include, for example, SSB-less cells, on-demand SSB, and on-demand system information block type 1 (SIB1).
  • An SSB-less cell means that the cell may transition to a mode where it stops broadcasting the synchronization signal block (SSB) based on a predetermined condition being met. This can contribute to reducing the energy consumption of the network, and therefore make the network more sustainable.
  • SSB synchronization signal block
  • On-demand SSB means that the access node 104, 104B may stop the periodic legacy transmissions of the SSB of the cell, but a UE 100, 102 may request the access node 104, 104B to transmit the SSB of the cell when it is needed.
  • On-demand SIB1 means that the access node 104, 104B may stop the periodic legacy transmissions of SIB1 of the cell, but a UE 100, 102 may request the access node 104, 104B to transmit the SIB1 of the cell when it is needed (e.g., by transmitting an uplink signal from the UE 100, 102 to the access node 104, 104B).
  • Cell A refers to a cell that is periodically transmitting at least its own SIB1 according to a legacy procedure (e.g., up to NR Release 18).
  • a UE is able to detect the cell A and camp on it.
  • the cell A may also be referred to as an anchor cell or a first cell herein.
  • a NES cell refers to a cell for which an on-demand SIB1 may be transmitted in response to an uplink wakeup signal transmitted from a UE.
  • the NES cell may support switching between on-demand SIB1 and legacy SIB1 operations (i.e., the periodic SIB1 transmission of the legacy procedure can be deactivated or activated as needed).
  • the NES cell may also be referred to as a non-anchor cell or a second cell herein.
  • the WUS configuration and OD-SIB1 information may be owned at the celllevel by DUs, and shared with the CUs over the F1 interface. The CUs may share this information with neighboring CUs over the Xn interface. These configurations may have a validity time duration or period associated with them. [0087] Some example embodiments also define the Xn and F1 signaling to request for OD-SIB1 activation. [0088] In some example embodiments, at the time of OD-SIB1 activation, the WUS configuration is broadcasted to the UE before disabling the legacy always-on SIB1. This will ensure that the NES cell is always reachable to the UE in one way or the other. Some example embodiments define the F1 and Xn signaling to enable this.
  • Some example embodiments may also provide F1 signaling to enable the CU to request the DU of the NES cell to update the master information block (MIB) to indicate whether the legacy always-on (periodic) SIB1 transmission is disabled or enabled.
  • the CU may request the DU to update the MIB to indicate whether the on-demand SIB1 transmission mode is active in the NES cell.
  • the MIB is transmitted in the SSB.
  • some example embodiments may provide F1 and Xn signaling to share the WUS configurations (from DU to CU and across CUs).
  • FIG. 3 illustrates a signal flow diagram according to an example embodiment (corresponding to option 1 of Table 1 above). This example embodiment relates to the scenario of FIG. 2B, where the cell A 121 and the NES cell 122 are non-co-located (i.e., controlled by different access nodes 104, 104B).
  • the cell A 121 is referred to as a first cell.
  • the first cell 121 is controlled by a first DU 105, which is controlled by a first CU 108.
  • the first CU 108 controls the first cell 121 via the first DU 105.
  • the first CU 108 and the first DU 105 may be comprised in a first access node 104 (e.g., a gNB).
  • the NES cell 122 is referred to as a second cell.
  • the second cell 122 is controlled by a second DU 105B, which is controlled by a second CU 108B.
  • the second CU 108B controls the second cell 122 via the second DU 105B.
  • the second CU 108B and the second DU 105B may be comprised in a second access node 104B (e.g., a gNB) different from the first access node 104.
  • FIG. 3 Although only one user device 100 is shown in FIG. 3, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 3 may be extended and applied according to the actual number of user devices.
  • the first DU 105 transmits, to the first CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 of the second cell 122 on the first cell 121.
  • the configuration information associated with the wake-up signal is intended to be used by a user device 100 to request the on-demand SIB1 of the second cell 122.
  • the configuration information may be transmitted over the F1 interface in an F1 setup request message or a DU configuration update request message.
  • the first DU 105 owns the WUS configuration (identified by an identifier such as PCI) and sends it to the first CU 108 via F1 signaling.
  • the first CU 108 receives the configuration information from the first DU 105.
  • the first CU 108 stores the configuration information for example in an internal memory of the first CU 108.
  • the second CU 108B transmits, to the first CU 108, a request message indicating that the on-demand SIB1 transmission mode is to be activated for the second cell 122 controlled by the second CU 108B.
  • the request message (e.g., called OD-SIB1 activation request) may be transmitted over the Xn interface.
  • the first CU 108 receives the request message.
  • the request message may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122, a configuration for an on-demand SIB1 procedure towards the second cell 122, and a content of the on-demand SIB1 of the second cell 122.
  • PCI physical cell identity
  • the content and the configuration for the on-demand SIB1 of the second cell 122 may be identifiable by the identifier of the second cell 122.
  • the second DU 105B may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSI B 1 information element in the MIB.
  • the user device 100 transmits the wake-up signal to the first DU 105 based on the configuration information and within the validity duration.
  • the first DU 105 monitors for the wake-up signal based on the configuration information, and receives the wake-up signal from the user device 100.
  • the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122, towards which the user device 100 is requesting the on-demand SIB1 transmission.
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the second DU 105B updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (e.g., the legacy SIB1 transmission mode is resumed).
  • the second DU 105B transmits, to the second CU 108B, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the second CU 108B receives the response.
  • the second CU 108B transmits, to the first CU 108, a request message indicating that the on-demand SIB1 transmission mode is to be deactivated for the second cell 122.
  • the request message e.g., called OD- SIB1 deactivation request
  • the first CU 108 receives the request message.
  • the first CU 108 stops transmitting (or broadcasting) the configuration information associated with the wake-up signal, as well as the on-demand SIB1 of the second cell 122.
  • the first CU 108 transmits, to the first DU 105, an indication to stop transmitting (or broadcasting) the WUS configuration information and the on-demand SIB1 of the second cell 122, and the first DU 105 then stops transmitting (or broadcasting) the WUS configuration information and the on-demand SIB1 of the second cell 122 on the first cell 121.
  • the first CU 108 transmits, to the second CU 108B, a response message indicating that the transmission (or broadcast) of the WUS configuration information and the on-demand SIB1 of the second cell 122 has been stopped.
  • the response message e.g., called OD-SIB1 deactivation response
  • the second CU 108B receives the response message.
  • the user device 100 discards or erases the configuration information associated with the wake-up signal, based on detecting that the validity duration has expired, or based on detecting that the transmission (or broadcast) of the WUS configuration information and/or the on-demand SIB1 of the second cell 122 has been stopped on the first cell 121. Alternatively, the user device 100 may keep the configuration information without using it after the validity duration has expired.
  • FIG. 4 illustrates a signal flow diagram according to an example embodiment (corresponding to option 2 of Table 1 above). This example embodiment relates to the scenario of FIG. 2B, where the cell A 121 and the NES cell 122 are non-co-located (i.e., controlled by different access nodes 104, 104B).
  • the NES cell 122 is referred to as a second cell.
  • the second cell 122 is controlled by a second DU 105B, which is controlled by a second CU 108B.
  • the second CU 108B controls the second cell 122 via the second DU 105B.
  • the second CU 108B and the second DU 105B may be comprised in a second access node 104B (e.g., a gNB) different from the first access node 104.
  • FIG. 4 Although only one user device 100 is shown in FIG. 4, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 4 may be extended and applied according to the actual number of user devices.
  • FIG. 4 A difference between FIG. 4 and FIG. 3 is that, in FIG. 4, the first CU 108 controlling the first cell 121 forwards the received wake-up signal to the second CU 108B controlling the second cell 122. The second CU 108B then identifies the corresponding second DU 105B from the identifier (e.g., PCI) comprised in the wake-up signal, and triggers OD-SIB1 transmission at the second DU 105B.
  • the identifier e.g., PCI
  • the first DU 105 transmits, to the first CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 of the second cell 122 on the first cell 121.
  • the configuration information associated with the wake-up signal is intended to be used by a user device 100 to request the on-demand SIB1 of the second cell 122.
  • the configuration information may be transmitted over the F1 interface in an F1 setup request message or a DU configuration update request message.
  • the first DU 105 owns the WUS configuration (identified by an identifier such as PCI) and sends it to the first CU 108 via F1 signaling.
  • the first CU 108 receives the configuration information from the first DU 105.
  • the first CU 108 stores the configuration information for example in an internal memory of the first CU 108.
  • the second CU 108B determines to activate an on-demand SIB1 transmission mode for the second cell 122 controlled by the second CU 108B.
  • the second cell 122 may be in a non- on-demand SIB1 operation mode (e.g., transmitting the periodic legacy SIB1 ).
  • the second DU 105B may determine to activate the on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105B may indicate its activation decision to the second CU 108B over the F1 interface.
  • the second CU 108B transmits, to the first CU 108, a request message indicating that the on-demand SIB1 transmission mode is to be activated for the second cell 122 controlled by the second CU 108B.
  • the request message (e.g., called OD-SIB1 activation request) may be transmitted over the Xn interface.
  • the first CU 108 receives the request message.
  • the request message comprises at least duration information indicating a validity duration of the on-demand SIB1 transmission mode for the second cell 122.
  • the validity duration refers to the time duration of how long the on-demand SIB1 transmission mode will remain active or is expected to remain active.
  • the validity duration comprises a time duration during which the user device 100 is allowed use the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122, wherein this time duration relates to the duration during which the second cell uses the on-demand SIB1 mode.
  • the request message may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122.
  • PCI physical cell identity
  • the first CU 108 transmits, to the user device 100, via the first DU 105, the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122 on the first cell 121.
  • the first CU 108 may transmit the configuration information to the first DU 105
  • the first DU 105 may transmit or forward the configuration information to the user device 100 on the first cell 121.
  • the first DU 105 may broadcast the configuration information in a system information block of the first cell 121 .
  • the user device 100 receives and stores the configuration information.
  • the purpose of the wake-up signal is to trigger the transmission of the on-demand SIB1 transmission of the second cell 122, which is in the on-demand SIB1 transmission mode (i.e., a type of energy-saving state).
  • the first CU 108 identifies the second access node 104B and/or the second CU 108B based on the identifier comprised in the wake-up signal.
  • the user device 100 accesses the second cell 122 based on the on-demand SIBlof the second cell 122.
  • the second DU 105B may determine to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration). In this case, the second DU 105B may indicate its deactivation decision to the second CU 108B over the F1 interface.
  • the second DU 105B updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the second DU stops transmitting (or broadcasting) the on-demand SIB1 of the second cell 122, and starts the SIB1 transmission for the second cell 122, based on updating the master information block to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell, and/or that the SIB1 transmission is activated for the second cell.
  • the second DU 105B transmits, to the second CU 108B, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the second CU 108B receives the response.
  • the cell A 121 is referred to as a first cell.
  • the first cell 121 is controlled by a first DU 105, which is controlled by a first CU 108.
  • the first CU 108 controls the first cell 121 via the first DU 105.
  • the first CU 108 and the first DU 105 may be comprised in a first access node 104 (e.g., a gNB).
  • FIG. 5 Although only one user device 100 is shown in FIG. 5, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 5 may be extended and applied according to the actual number of user devices.
  • FIG. 5 A difference between FIG. 5 and FIG. 4 is that, in FIG. 5, the second DU 105B controlling the second cell 122 owns the WUS configuration and sends it to the second CU 105B (e.g., via F1 signaling). The second CU 105B then sends the WUS configuration of the second cell 122 (e.g., via Xn signaling) to the first CU 105 controlling the first cell 121. In this case, the user device 100 transmits the wake-up signal to the second DU 105B (instead of to the first DU 105 as shown in FIG. 3 and FIG. 4).
  • the second DU 105B transmits, to the second CU 108B, configuration information associated with a wake-up signal for requesting an on-demand SIB1 of the second cell 122 on the second cell 122.
  • the configuration information associated with the wake-up signal is intended to be used by a user device 100 to request the on-demand SIB1 of the second cell 122.
  • the configuration information may be transmitted over the F1 interface in an F1 setup request message or a DU configuration update request message.
  • the second DU 105B owns the WUS configuration (identified by an identifier such as PCI) and sends it to the second DU 108B via F1 signaling.
  • the second CU 108B receives the configuration information associated with the wake-up signal from the second DU 105B.
  • the second CU 108B transmits, to the first CU 108, the configuration information associated with the wake-up signal.
  • the second CU 108B may transmit the configuration information over the Xn interface in an Xn setup request message.
  • the first CU 108 receives the configuration information associated with the wakeup signal from the second CU 108B.
  • the first CU 108 stores the configuration information for example in an internal memory of the first CU 108.
  • the second CU 108B determines to activate an on-demand SIB1 transmission mode for the second cell 122 controlled by the second CU 108B.
  • the second cell 122 may be in a non- on-demand SIB1 operation mode (e.g., transmitting the periodic legacy SIB1 ).
  • the second DU 105B may determine to activate the on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105B may indicate its activation decision to the second CU 108B over the F1 interface.
  • the second CU 108B transmits, to the first CU 108, a request message indicating that the on-demand SIB1 transmission mode is to be activated for the second cell 122 controlled by the second CU 108B.
  • the request message (e.g., called OD-SIB1 activation request) may be transmitted over the Xn interface.
  • the first CU 108 receives the request message.
  • the request message comprises at least duration information indicating a validity duration of the on-demand SIB1 transmission mode for the second cell 122.
  • the validity duration refers to the time duration of how long the on-demand SIB1 transmission mode will remain active or is expected to remain active.
  • the validity duration comprises a time duration during which the user device 100 is allowed use the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122, wherein this time duration relates to the duration during which the second cell uses the on-demand SIB1 mode.
  • the request message may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122.
  • PCI physical cell identity
  • the first CU 108 transmits, to the user device 100, via the first DU 105, the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122 on the second cell 122.
  • the first CU 108 may transmit the configuration information to the first DU 105
  • the first DU 105 may transmit or forward the configuration information to the user device 100 on the first cell 121.
  • the first DU 105 may broadcast the configuration information in a system information block of the first cell 121.
  • the user device 100 receives and stores the configuration information.
  • the configuration information indicates one or more conditions related to the wake-up signal (e.g., for transmitting the wake-up signal).
  • the configuration information may further comprise the duration information indicating the validity duration of the on-demand SIB1 transmission mode for the second cell 122.
  • the first CU 108 may transmit the duration information separately to the user device 100 (via the first DU 105), and the user device 100 may receive the duration information from the first CU 108 in the separate transmission.
  • the first CU 108 transmits, to the second CU 108B, a response message indicating that the configuration information associated with the wake-up signal has been transmitted to the user device 100.
  • the response message e.g., called OD-SIB1 activation response
  • the second CU 108B receives the response message.
  • the second CU 108B transmits, to the second DU 105B, a request for updating a master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that an SIB1 transmission (e.g., the periodic legacy SIB1 transmission) is deactivated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105B receives the request.
  • the second DU 105B updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the second DU 105B may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSI B 1 information element in the MIB, as described above with reference to FIG. 3.
  • the second DU 105B stops the SIB1 transmission (broadcast) for the second cell 122 based on updating the master information block, and the second cell 122 enters the on-demand SIB1 transmission mode.
  • the second DU 105B transmits, to the second CU 108B, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the second CU 108B receives the response.
  • the user device 100 detects that the one or more conditions for transmitting the wake-up signal are fulfilled within the validity duration.
  • the one or more conditions for transmitting the wake-up signal may be related to at least one of: one or more radio conditions of the user device 100, or a presence of uplink data to be transmitted from the user device 100.
  • the one or more radio conditions refer to the quality of the wireless communication channel between the user device 100 and the network (e.g., the first DU 105 or the second DU 105B). Factors such as signal strength, interference, and noise may affect the one or more radio conditions.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the user device 100 transmits the wake-up signal to the second DU 105B based on the configuration information and within the validity duration.
  • the second DU 105B monitors for the wake-up signal based on the configuration information, and receives the wake-up signal from the user device 100.
  • the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122, towards which the user device 100 is requesting the on-demand SIB1 transmission.
  • the purpose of the wake-up signal is to trigger the transmission of the on-demand SIB1 transmission of the second cell 122, which is in the on-demand SIB1 transmission mode (i.e., a type of energy-saving state).
  • the second DU 105B transmits or forwards, to the second CU 108B, the wake-up signal transmitted from the user device 100, wherein the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122.
  • the second DU 105B may transmit the wake-up signal to the second CU 108B over the F1 interface.
  • the second CU 108B receives the wake-up signal from the second DU 105B.
  • the second CU 108B transmits, to the second DU 105B, a request for transmitting the on-demand SIB1 of the second cell 122 to the user device 100 (or for broadcasting the on-demand SIB1 of the second cell 122 on the second cell 122).
  • the second CU 108B may transmit the request over the F1 interface in a gNB CU configuration update message.
  • the second DU 105B receives the request.
  • the configuration and the content of the on-demand SIB1 of the second cell 122 may be known or stored at the second DU 105B or included in the request.
  • the second DU 105B transmits the on-demand SIB1 of the second cell 122 to the user device 100 (or broadcasts the on-demand SIB1 of the second cell 122 on the second cell 122) based on the configuration of the on-demand SIB1 of the second cell 122.
  • the user device 100 receives the on- demand SI B1 of the second cell 122.
  • the user device 100 synchronizes with the second cell 122 and reads and stores the on-demand SIB1 of the second cell 122.
  • the on-demand SIB1 comprises the minimum system information needed for initial access to the second cell 122.
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the second CU 108B determines to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration).
  • the second CU 108B transmits, to the second DU 105B, a request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105B receives the request.
  • the second DU 105B updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the second DU 105B stops transmitting (or broadcasting) the on-demand SIB1 of the second cell 122, and starts the SIB1 transmission for the second cell 122, based on updating the master information block to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell, and/or that the SIB1 transmission is activated for the second cell.
  • the second DU 105B transmits, to the second CU 108B, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the second CU 108B receives the response.
  • the second CU 108B transmits, to the first CU 108, a request message indicating that the on-demand SIB1 transmission mode is to be deactivated for the second cell 122.
  • the request message (e.g., called OD- SIB1 deactivation request) may be transmitted over the Xn interface.
  • the first CU 108 receives the request message.
  • the first CU 108 stops transmitting or broadcasting the configuration information associated with the wake-up signal.
  • the first CU 108 transmits, to the first DU 105, an indication to stop transmitting or broadcasting the WUS configuration information, and the first DU 105 then stops transmitting or broadcasting the WUS configuration information for the second cell 122 on the first cell 121.
  • the first CU 108 transmits, to the second CU 108B, a response message indicating that the transmission (or broadcast) of the WUS configuration information has been stopped.
  • the response message e.g., called OD-SIB1 deactivation response
  • the second CU 108B receives the response message.
  • the user device 100 may discard or erase the configuration information associated with the wake-up signal based on detecting that the validity duration has expired, or based on detecting that the transmission (or broadcast) of the WUS configuration information and/or the on-demand SIB1 of the second cell 122 has been stopped. Alternatively, the user device 100 may keep the configuration information without using it after the validity duration has expired.
  • FIG. 6 illustrates a signal flow diagram according to an example embodiment (corresponding to option 4 of Table 1 above).
  • the NES cell 122 is involved (i.e., the cell A 121 is not needed), which means that the NES cell 122 is responsible for the provisioning of the WUS configuration, the monitoring for the WUS, and the transmission of the OD-SIB1 when requested.
  • the NES cell 122 is referred to as a second cell.
  • the second cell 122 is controlled by a second DU 105B, which is controlled by a second CU 108B.
  • the second CU 108B controls the second cell 122 via the second DU 105B.
  • FIG. 6 Although only one user device 100 is shown in FIG. 6, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 6 may be extended and applied according to the actual number of user devices.
  • the second DU 105B transmits, to the second CU 108B, configuration information associated with a wake-up signal for requesting an on-demand SIB1 of the second cell 122 on the second cell 122.
  • the configuration information associated with the wake-up signal is intended to be used by a user device 100 to request the on-demand SIB1 of the second cell 122.
  • the configuration information may be transmitted over the F1 interface in an F1 setup request message or a DU configuration update request message.
  • the second DU 105B owns the WUS configuration (identified by an identifier such as PCI) and sends it to the second DU 108B via F1 signaling.
  • the second CU 108B receives the configuration information associated with the wake-up signal from the second DU 105B.
  • the second CU 108B stores the configuration information for example in an internal memory of the second CU 108B.
  • the second DU 105B may determine to activate the on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105B may indicate its activation decision to the second CU 108B over the F1 interface.
  • the user device 100 stores the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122 on the second cell 122.
  • the configuration information indicates one or more conditions related to the wake-up signal (e.g., for transmitting the wake-up signal).
  • the configuration information may further comprise duration information indicating the validity duration of the on-demand SIB1 transmission mode for the second cell 122.
  • the second CU 108B may transmit the duration information separately to the user device 100 (via the second DU 105B), and the user device 100 may receive the duration information from the second CU 108B in the separate transmission.
  • the second CU 108B transmits, to the second DU 105B, a request for updating a master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that an SIB1 transmission (e.g., the periodic legacy SIB1 transmission) is deactivated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105B receives the request.
  • the second DU 105B updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the second DU 105B may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSI B 1 information element in the MIB, as described above with reference to FIG. 3.
  • the second DU 105B transmits, to the second CU 108B, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the second CU 108B receives the response.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the user device 100 transmits the wake-up signal to the second DU 105B based on the configuration information and within the validity duration.
  • the second DU 105B monitors for the wake-up signal based on the configuration information, and receives the wake-up signal from the user device 100.
  • the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122, towards which the user device 100 is requesting the on-demand SIB1 transmission.
  • the purpose of the wake-up signal is to trigger the transmission of the on-demand SIB1 transmission of the second cell 122, which is in the on-demand SIB1 transmission mode (i.e., a type of energy-saving state).
  • the second DU 105B transmits or forwards, to the second CU 108B, the wake-up signal transmitted from the user device 100, wherein the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122.
  • the second DU 105B may transmit the wake-up signal to the second CU 108B over the F1 interface.
  • the second CU 108B receives the wake-up signal from the second DU 105B.
  • the second CU 108B identifies, based on the identifier comprised in the wake-up signal, at least one of: the second DU 105B, the configuration for the on-demand SIB1 procedure towards the second cell 122, or the content of the on-demand SIB1 of the second cell 122.
  • the second DU 105B transmits the on-demand SIB1 of the second cell 122 to the user device 100 (or broadcasts the on-demand SIB1 of the second cell 122 on the second cell 122) based on the configuration of the on-demand SIB1 procedure towards the second cell 122.
  • the user device 100 receives the on-demand SI B1 of the second cell 122.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SIB1 , or transmitting the on-demand SIB1 via unicast or groupcast to the user device 100 that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast).
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the second CU 108B determines to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration).
  • the second DU 105B may determine to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration). In this case, the second DU 105B may indicate its activation decision to the second CU 108B over the F1 interface.
  • the second DU 105B updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the second DU 105B transmits, to the second CU 108B, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the second CU 108B receives the response.
  • FIG. 7 illustrates a signal flow diagram according to an example embodiment (corresponding to option 1 in Table 1 above).
  • This example embodiment relates to the scenario of FIG. 2A, where the cell A 121 and the NES cell 122 are co-located (i.e., controlled by the same access node 104).
  • the cell A 121 and the NES cell 122 are controlled by different DUs 105, 105A of the same access node 104.
  • the cell A 121 is referred to as a first cell.
  • the first cell 121 is controlled by a first DU 105, which is controlled by a CU 108.
  • the CU 108 controls the first cell 121 via the first DU 105.
  • the NES cell 122 is referred to as a second cell.
  • the second cell 122 is controlled by a second DU 105A, which is controlled by the same CU 108.
  • the CU 108 controls the second cell 122 via the second DU 105A.
  • the CU 108, the first DU 105, and the second DU 105A may be comprised in the same access node 104B (e.g., a gNB).
  • the first DU 105 transmits, to the CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 on the first cell 121 (i.e., WUS configuration information of the first cell 121).
  • WUS configuration information i.e., WUS configuration information of the first cell 121.
  • the configuration information may be transmitted over the F1 interface, for example, in an F1 setup request message or a DU configuration update request message.
  • the CU 108 receives the configuration information from the first DU 105.
  • the configuration information associated with the wake-up signal of the first cell 121 may further comprise an identifier such as a physical cell identity (PCI) associated with the first cell 121.
  • PCI physical cell identity
  • the first DU 105 may also transmit, to the CU 108, a content of the on-demand SIB1 of the first cell 121, for example together with the configuration for the on-demand SIB1 procedure towards the first cell 121.
  • the content and the configuration for the on-demand SIB1 of the first cell 121 may be identifiable by the identifier of the first cell 121.
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105A may transmit the duration information separately to the CU 108.
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122.
  • PCI physical cell identity
  • the second DU 105A may also transmit, to the CU 108, a configuration for an on-demand SIB1 procedure towards the second cell 122.
  • the configuration for the on-demand SIB1 procedure may be included in the same message as the configuration information associated with the wake-up signal.
  • the configuration for the on-demand SIB1 procedure may be transmitted in a separate message (e.g., over the F1 interface).
  • the configuration for the on-demand SIB1 procedure towards the second cell 122 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the second cell 122.
  • the second DU 105A may also transmit, to the CU 108, a content of the on-demand SIB1 of the second cell 122, for example together with the configuration for the on-demand SIB1 procedure towards the second cell 122.
  • the content and the configuration for the on-demand SIB1 of the second cell 122 may be identifiable by the identifier of the second cell 122.
  • the CU 108 stores the information received at 701 and 702 (e.g., in an internal memory of the CU 108).
  • the CU 108 transmits, to a user device 100, via the first DU 105, the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122 on the first cell 121 (i.e., the WUS configuration received from the first DU 105 at 701).
  • the CU 108 may transmit the configuration information to the first DU 105
  • the first DU 105 may transmit or forward the configuration information to the user device 100 on the first cell 121.
  • the first DU 105 may broadcast the configuration information in a system information block of the first cell 121.
  • the user device 100 receives and stores the configuration information.
  • the CU 108 may also transmit, to the user device 100, via the first DU 105, the duration information indicating the validity duration of the on-demand SIB1 transmission mode of the second cell 122.
  • the duration information may be transmitted together with the configuration information, or separately from the configuration information.
  • the second DU 105A may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSIBI information element in the MIB, as described above with reference to FIG. 3.
  • the second DU 105A stops the SIB1 transmission (broadcast) for the second cell 122 based on updating the master information block, and the second cell 122 enters the on-demand SIB1 transmission mode.
  • the second DU 105A transmits, to the CU 108, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the CU 108 receives the response.
  • the user device 100 detects that the one or more conditions (indicated in the configuration information received at 705) for transmitting the wake-up signal are fulfilled within the validity duration.
  • the one or more conditions for transmitting the wake-up signal may be related to at least one of: one or more radio conditions of the user device 100, or a presence of uplink data to be transmitted from the user device 100.
  • the one or more radio conditions refer to the quality of the wireless communication channel between the user device 100 and the network (e.g., the first DU 105 or the second DU 105A). Factors such as signal strength, interference, and noise may affect the one or more radio conditions.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the user device 100 transmits the wake-up signal to the first DU 105 based on the configuration information and within the validity duration.
  • the first DU 105 monitors for the wake-up signal based on the configuration information, and receives the wake-up signal from the user device 100.
  • the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122, towards which the user device 100 is requesting the on-demand SIB1 transmission.
  • the CU 108 identifies the configuration and/or the content for the on-demand SIB1 of the second cell 122 based on the identifier comprised in the wake-up signal. In other words, the CU 108 identifies the OD-SIB1 information from the received PCI and then triggers the transmission of the on-demand SIB1 of the second cell 122.
  • the CU 108 transmits, to the first DU 105, a request for transmitting the on-demand SIB1 of the second cell 122 to the user device 100 (or for broadcasting the on-demand SIB1 of the second cell 122 on the first cell 121), wherein the request comprises the configuration and the content for the on-demand SIB1 (provided by the second DU 105A at 702), which were identified based on the wake-up signal.
  • the CU 108 may transmit the request over the F1 interface in a gNB CU configuration update message.
  • the first DU 105 receives the request.
  • the first DU 105 transmits the on-demand SIB1 of the second cell 122 to the user device 100 (or broadcasts the on-demand SIB1 of the second cell 122 on the first cell 121) based on the configuration of the on-demand SIB1 procedure towards the second cell 122.
  • the user device 100 receives the on-demand SI B1 of the second cell 122.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SIB1 , or transmitting the on-demand SIB1 via unicast or groupcast to the user device 100 that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast).
  • the user device 100 synchronizes with the second cell 122 and reads and stores the on-demand SIB1 of the second cell 122.
  • the on-demand SIB1 comprises the minimum system information needed for initial access to the second cell 122.
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the CU 108 determines to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration).
  • the second DU 105A may determine to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration). In this case, the second DU 105A may indicate its deactivation decision to the CU 108 over the F1 interface.
  • the CU 108 transmits, to the second DU 105A, a request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the CU 108 stops transmitting (or broadcasting) the configuration information associated with the wake-up signal, as well as the on-demand SIB1 of the second cell 122.
  • the CU 108 transmits, to the first DU 105, an indication to stop transmitting (or broadcasting) the WUS configuration information and the on-demand SIB1 of the second cell 122, and the first DU 105 then stops transmitting (or broadcasting) the WUS configuration information and the on-demand SIB1 of the second cell 122 on the first cell 121.
  • FIG. 8 Although only one user device 100 is shown in FIG. 8, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 8 may be extended and applied according to the actual number of user devices.
  • the first DU 105 transmits, to the CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 on the first cell 121 (i.e., WUS configuration information of the first cell 121).
  • WUS configuration information i.e., WUS configuration information of the first cell 121.
  • the configuration information may be transmitted over the F1 interface, for example, in an F1 setup request message or a DU configuration update request message.
  • the CU 108 receives the configuration information from the first DU 105.
  • the configuration information of the first cell 121 indicates one or more conditions related to the wake-up signal (e.g., for transmitting the wake-up signal on the first cell 121).
  • the configuration information associated with the wake-up signal of the first cell 121 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the first cell 121.
  • the first DU 105 may transmit the duration information separately to the CU 108.
  • the first DU 105 may also transmit, to the CU 108, a configuration for an on-demand SIB1 procedure towards the first cell 121.
  • the configuration for the on-demand SIB1 procedure may be included in the same message as the configuration information associated with the wake-up signal.
  • the configuration for the on-demand SIB1 procedure may be transmitted in a separate message (e.g., over the F1 interface).
  • the configuration for the on-demand SIB1 procedure towards the first cell 121 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the first cell 121.
  • the first DU 105 may also transmit, to the CU 108, a content of the on-demand SIB1 of the first cell 121 , for example together with the configuration for the on-demand SIB1 procedure towards the first cell 121.
  • the content and the configuration for the on-demand SIB1 of the first cell 121 may be identifiable by the identifier of the first cell
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105A may transmit the duration information separately to the CU 108.
  • the content and the configuration for the on-demand SIB1 of the second cell 122 may be identifiable by the identifier of the second cell 122.
  • the second DU 105A may determine to activate the on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105A may indicate its activation decision to the CU 108 over the F1 interface.
  • the CU 108 transmits, to a user device 100, via the first DU 105, the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122 on the first cell 121 (i.e., the WUS configuration received from the first DU 105 at 801).
  • the CU 108 may transmit the configuration information to the first DU 105
  • the first DU 105 may transmit or forward the configuration information to the user device 100 on the first cell 121.
  • the first DU 105 may broadcast the configuration information in a system information block of the first cell 121.
  • the user device 100 receives and stores the configuration information.
  • the CU 108 transmits, to the second DU 105A, a request for updating a master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that an SIB1 transmission (e.g., the periodic legacy SIB1 transmission) is deactivated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSI B 1 information element in the MIB, as described above with reference to FIG. 3.
  • the second DU 105A stops the SIB1 transmission (broadcast) for the second cell 122 based on updating the master information block, and the second cell 122 enters the on-demand SIB1 transmission mode.
  • the user device 100 detects that the one or more conditions (indicated in the configuration information received at 805) for transmitting the wake-up signal are fulfilled within the validity duration.
  • the one or more conditions for transmitting the wake-up signal may be related to at least one of: one or more radio conditions of the user device 100, or a presence of uplink data to be transmitted from the user device 100.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the purpose of the wake-up signal is to trigger the transmission of the on-demand SIB1 transmission of the second cell 122, which is in the on-demand SIB1 transmission mode (i.e., a type of energy-saving state).
  • the CU 108 identifies the configuration and/or the content for the on-demand SIB1 of the second cell 122 based on the identifier comprised in the wake-up signal. In other words, the CU 108 identifies the OD-SIB1 information from the received PCI and then triggers the transmission of the on-demand SIB1 of the second cell 122. [0351] At 814, the CU 108 transmits, to the second DU 105A, a request for transmitting the on-demand SIB1 of the second cell 122 to the user device 100 (or for broadcasting the on-demand SIB1 of the second cell 122 on the second cell 122).
  • the request may comprise or indicate the configuration and the content for the on-demand SIB1 (provided by the second DU 105A at 802), which were identified based on the wake-up signal.
  • the CU 108 may transmit the request over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A transmits the on-demand SIB1 of the second cell 122 to the user device 100 (or broadcasts the on-demand SIB1 of the second cell 122 on the second cell 122) based on the configuration of the on-demand SIB1 procedure towards the second cell 122.
  • the user device 100 receives the on-demand SI B1 of the second cell 122.
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the CU 108 determines to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration).
  • the CU 108 transmits, to the second DU 105A, a request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the second DU 105A stops transmitting (or broadcasting) the on-demand SIB1 of the second cell 122 and starts the SIB1 transmission for the second cell 122, based on updating the master information block to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell, and/or that the SIB1 transmission is activated for the second cell.
  • the second DU 105A transmits, to the CU 108, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the CU 108 receives the response.
  • the CU 108 stops transmitting (or broadcasting) the configuration information associated with the wake-up signal. In other words, the CU 108 transmits, to the first DU 105, an indication to stop transmitting (or broadcasting) the WUS configuration information, and the first DU 105 then stops transmitting (or broadcasting) the WUS configuration information on the first cell 121.
  • the user device 100 discards or erases the configuration information associated with the wake-up signal based on detecting that the validity duration has expired, based on detecting that the transmission (or broadcast) of the WUS configuration information and/or the on-demand SIB1 of the second cell 122 has been stopped. Alternatively, the user device 100 may keep the configuration information without using it after the validity duration has expired.
  • FIG. 9 illustrates a signal flow diagram according to an example embodiment (corresponding to option 3 in Table 1 above).
  • This example embodiment relates to the scenario of FIG. 2A, where the cell A 121 and the NES cell 122 are co-located (i.e., controlled by the same access node 104).
  • the cell A 121 and the NES cell 122 are controlled by different DUs 105, 105A of the same access node 104.
  • the cell A 121 is referred to as a first cell.
  • the first cell 121 is controlled by a first DU 105, which is controlled by a CU 108.
  • the CU 108 controls the first cell 121 via the first DU 105.
  • the NES cell 122 is referred to as a second cell.
  • the second cell 122 is controlled by a second DU 105A, which is controlled by the same CU 108.
  • the CU 108 controls the second cell 122 via the second DU 105A.
  • the CU 108, the first DU 105, and the second DU 105A may be comprised in the same access node 104B (e.g., a gNB).
  • FIG. 9 Although only one user device 100 is shown in FIG. 9, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 9 may be extended and applied according to the actual number of user devices.
  • FIG. 9 A difference between FIG. 9 and FIG. 8 is that, in FIG. 9, the wake-up signal is handled through the second cell 122 (via the second DU 105A). In FIG. 8, the wake-up signal is handled through the first cell 121 (via the first DU 105).
  • the first DU 105 transmits, to the CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 on the first cell 121 (i.e., WUS configuration information of the first cell 121).
  • WUS configuration information i.e., WUS configuration information of the first cell 121.
  • the configuration information may be transmitted over the F1 interface, for example, in an F1 setup request message or a DU configuration update request message.
  • the CU 108 receives the configuration information from the first DU 105.
  • the configuration information associated with the wake-up signal of the first cell 121 may further comprise an identifier such as a physical cell identity (PCI) associated with the first cell 121.
  • PCI physical cell identity
  • the configuration for the on-demand SIB1 procedure towards the first cell 121 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the first cell 121.
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105A may transmit the duration information separately to the CU 108.
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122.
  • PCI physical cell identity
  • the configuration for the on-demand SIB1 procedure towards the second cell 122 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the second cell 122.
  • the second DU 105A may also transmit, to the CU 108, a content of the on-demand SIB1 of the second cell 122, for example together with the configuration for the on-demand SIB1 procedure towards the second cell 122.
  • the content and the configuration for the on-demand SIB1 of the second cell 122 may be identifiable by the identifier of the second cell 122.
  • the CU 108 stores the information received at 901 and 902 (e.g., in an internal memory of the CU 108).
  • the CU 108 determines to activate the on-demand SIB1 transmission mode for the second cell 122 controlled by the second DU 105A.
  • the second cell 122 may be in a non-on-demand SIB1 operation mode (e.g., transmitting the periodic legacy SIB1 transmission).
  • the second DU 105A may determine to activate the on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105A may indicate its activation decision to the CU 108 over the F1 interface.
  • the CU 108 may also transmit, to the user device 100, via the first DU 105, the duration information indicating the validity duration of the on-demand SIB1 transmission mode of the second cell 122.
  • the duration information may be transmitted together with the configuration information, or separately from the configuration information.
  • the CU 108 transmits, to the second DU 105A, a request for updating a master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that an SIB1 transmission (e.g., the periodic legacy SIB1 transmission) is deactivated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the second DU 105A may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSI B 1 information element in the MIB, as described above with reference to FIG. 3.
  • the second DU 105A stops the SIB1 transmission (broadcast) for the second cell 122 based on updating the master information block, and the second cell 122 enters the on-demand SIB1 transmission mode.
  • the user device 100 detects that the one or more conditions (indicated in the configuration information received at 905) for transmitting the wake-up signal are fulfilled within the validity duration.
  • the one or more conditions for transmitting the wake-up signal may be related to at least one of: one or more radio conditions of the user device 100, or a presence of uplink data to be transmitted from the user device 100.
  • the one or more radio conditions refer to the quality of the wireless communication channel between the user device 100 and the network (e.g., the first DU 105 or the second DU 105A). Factors such as signal strength, interference, and noise may affect the one or more radio conditions.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the second DU 105A may determine to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration). In this case, the second DU 105A may indicate its deactivation decision to the CU 108 over the F1 interface.
  • the cell A 121 is referred to as a first cell.
  • the first cell 121 is controlled by a first DU 105, which is controlled by a CU 108.
  • the CU 108 controls the first cell 121 via the first DU 105.
  • the configuration information of the first cell 121 indicates one or more conditions related to the wake-up signal (e.g., for transmitting the wake-up signal on the first cell 121).
  • the first DU 105 may also transmit, to the CU 108, a content of the on-demand SIB1 of the first cell 121 , for example together with the configuration for the on-demand SIB1 procedure towards the first cell 121.
  • the content and the configuration for the on-demand SIB1 of the first cell 121 may be identifiable by the identifier of the first cell
  • the second DU 105A transmits, to the CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 on the second cell 122 (i.e., WUS configuration information of the second cell 122).
  • WUS configuration information i.e., WUS configuration information of the second cell 122
  • the configuration information may be transmitted over the F1 interface, for example, in an F1 setup request message or a DU configuration update request message.
  • the CU 108 receives the configuration information from the second DU 105A.
  • the configuration information of the second cell 122 indicates one or more conditions related to the wake-up signal (e.g., for transmitting the wake-up signal on the second cell 122).
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the second cell 122.
  • the second DU 105A may transmit the duration information separately to the CU 108.
  • the configuration information associated with the wake-up signal of the second cell 122 may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122.
  • PCI physical cell identity
  • the second DU 105A may also transmit, to the CU 108, a configuration for an on-demand SIB1 procedure towards the second cell 122.
  • the configuration for the on-demand SIB1 procedure may be included in the same message as the configuration information associated with the wake-up signal.
  • the configuration for the on-demand SIB1 procedure may be transmitted in a separate message (e.g., over the F1 interface).
  • the configuration for the on-demand SIB1 procedure towards the second cell 122 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the second cell 122.
  • the second DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the second DU 105A stops the SIB1 transmission (broadcast) for the second cell 122 based on updating the master information block, and the second cell 122 enters the on-demand SIB1 transmission mode.
  • the second DU 105A transmits, to the CU 108, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the CU 108 receives the response.
  • the user device 100 detects that the one or more conditions (indicated in the configuration information received at 1005) for transmitting the wake-up signal are fulfilled within the validity duration.
  • the one or more conditions for transmitting the wake-up signal may be related to at least one of: one or more radio conditions of the user device 100, or a presence of uplink data to be transmitted from the user device 100.
  • the one or more radio conditions refer to the quality of the wireless communication channel between the user device 100 and the network (e.g., the first DU 105 or the second DU 105A). Factors such as signal strength, interference, and noise may affect the one or more radio conditions.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the user device 100 transmits the wake-up signal to the second DU 105A based on the configuration information and within the validity duration.
  • the second DU 105A monitors for the wake-up signal based on the configuration information, and receives the wake-up signal from the user device 100.
  • the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122, towards which the user device 100 is requesting the on-demand SIB1 transmission.
  • the purpose of the wake-up signal is to trigger the transmission of the on-demand SIB1 transmission of the second cell 122, which is in the on-demand SIB1 transmission mode (i.e., a type of energy-saving state).
  • the second DU 105A transmits or forwards, to the CU 108, the wake-up signal transmitted from the user device 100, wherein the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122.
  • the second DU 105A may transmit the wake-up signal to the CU 108 over the F1 interface.
  • the CU 108 receives the wake-up signal from the second DU 105A.
  • the CU 108 identifies the configuration and/or the content for the on-demand SIB1 of the second cell 122 based on the identifier comprised in the wake-up signal. In other words, the CU 108 identifies the OD-SIB1 information from the received PCI and then triggers the transmission of the on-demand SIB1 of the second cell 122. [0449] At 1014, the CU 108 transmits, to the second DU 105A, a request for transmitting the on-demand SIB1 of the second cell 122 to the user device 100 (or for broadcasting the on-demand SIB1 of the second cell 122 on the second cell 122).
  • the request may comprise or indicate the configuration and the content for the on-demand SIB1 (provided by the second DU 105A at 802), which were identified based on the wake-up signal.
  • the CU 108 may transmit the request over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A transmits the on-demand SIB1 of the second cell 122 to the user device 100 (or broadcasts the on-demand SIB1 of the second cell 122 on the second cell 122) based on the configuration of the on-demand SIB1 procedure towards the second cell 122.
  • the user device 100 receives the on-demand SI B1 of the second cell 122.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SIB1 , or transmitting the on-demand SIB1 via unicast or groupcast to the user device 100 that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast).
  • the user device 100 synchronizes with the second cell 122 and reads and stores the on-demand SIB1 of the second cell 122.
  • the on-demand SIB1 comprises the minimum system information needed for initial access to the second cell 122.
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the CU 108 determines to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration).
  • the second DU 105A may determine to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration). In this case, the second DU 105A may indicate its deactivation decision to the CU 108 over the F1 interface.
  • the CU 108 transmits, to the second DU 105A, a request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the second DU 105A receives the request.
  • the second DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the second DU 105B stops transmitting (or broadcasting) the configuration information associated with the wake-up signal, stops transmitting (or broadcasting) the on-demand SIB1 of the second cell 122, and starts the SIB1 transmission for the second cell 122, based on updating the master information block to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell, and/or that the SIB1 transmission is activated for the second cell.
  • the second DU 105A transmits, to the CU 108, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the CU 108 receives the response.
  • the user device 100 discards or erases the configuration information associated with the wake-up signal based on detecting that the validity duration has expired, or based on detecting that the transmission (or broadcast) of the WUS configuration information and/or the on-demand SIB1 of the second cell 122 has been stopped. Alternatively, the user device 100 may keep the configuration information without using it after the validity duration has expired.
  • FIG. 11 illustrates a signal flow diagram according to an example embodiment (corresponding to option 1 in Table 1 above).
  • This example embodiment relates to the scenario of FIG. 2A, where the cell A 121 and the NES cell 122 are co-located (i.e., controlled by the same access node 104).
  • the cell A 121 and the NES cell 122 are controlled by the same DU 105A of the access node 104.
  • all the F1 signaling happens with the same DU 105A, and there is no Xn signaling involved.
  • the solution options 2, 3 and 4 of Table 1 may also be realized with a single DU with similar F1 signaling changes as shown in FIG. 11.
  • the cell A 121 is referred to as a first cell
  • the NES cell 122 is referred to as a second cell.
  • the DU 105A is controlled by a CU 108.
  • the CU 108 controls the first cell 121 and the second cell 122 via the DU 105A.
  • the CU 108 and the DU 105A may be comprised in the same access node 104 (e.g., a gNB).
  • FIG. 11 Although only one user device 100 is shown in FIG. 11, it should be noted that the number of user devices may also be different than one. In other words, there may be one or more user devices, and the signaling procedure illustrated in FIG. 11 may be extended and applied according to the actual number of user devices.
  • the DU 105A transmits, to the CU 108, configuration information associated with a wake-up signal for requesting an on-demand SIB1 on the first cell 121 (i.e., WUS configuration information of the first cell 121), and configuration information associated with a wake-up signal for requesting an on-demand SIB1 on the second cell 122 (i.e., WUS configuration information of the second cell 122).
  • the WUS configuration information of the second cell 122 may be used by a user device 100 to request the on-demand SIB1 of the second cell 122 on the second cell 122.
  • the configuration information may be transmitted over the F1 interface, for example, in an F1 setup request message or a DU configuration update request message.
  • the CU 108 receives the configuration information from the DU 105A.
  • the configuration information associated with the wake-up signal indicates one or more conditions related to the wake-up signal (e.g., for transmitting the wake-up signal).
  • the WUS configuration information of the first cell 121 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the first cell 121.
  • the DU 105A may transmit the duration information separately to the CU 108.
  • the WUS configuration information of the second cell 122 may further comprise duration information indicating a validity duration of an on-demand SIB1 transmission mode for the second cell 122.
  • the DU 105A may transmit the duration information separately to the CU 108.
  • the WUS configuration information of the first cell 121 may further comprise an identifier such as a physical cell identity (PCI) associated with the first cell 121.
  • PCI physical cell identity
  • the WUS configuration information of the second cell 122 may further comprise an identifier such as a physical cell identity (PCI) associated with the second cell 122.
  • PCI physical cell identity
  • the DU 105A may also transmit, to the CU 108, a configuration for an on-demand SIB1 procedure towards the first cell 121, and a configuration for an on-demand SIB1 procedure towards the second cell 122.
  • the configurations for the on-demand SIB1 procedures may be included in the same message as the configuration information associated with the wake-up signal. Alternatively, the configurations for the on-demand SIB1 procedures may be transmitted in a separate message (e.g., over the F1 interface).
  • the configuration for the on-demand SIB1 procedure towards the first cell 122 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the first cell 121.
  • the configuration for the on-demand SIB1 procedure towards the second cell 122 may comprise a radio resource configuration for transmitting the on-demand SIB1 of the second cell 122.
  • the DU 105A may also transmit, to the CU 108, a content of the on-demand SIB1 of the first cell 121, and a content of the on-demand SIB1 of the second cell 122, for example together with the configuration for the on-demand SIB1 procedure of the respective cell.
  • the content and the configuration for the on-demand SIB1 may be identifiable by the identifier of the respective cell.
  • the CU 108 stores the information received at 1101 and 1102 (e.g., in an internal memory of the CU 108).
  • the CU 108 determines to activate the on-demand SIB1 transmission mode for the second cell 122 controlled by the DU 105A.
  • the second cell 122 may be in a non-on-demand SIB1 operation mode (e.g., transmitting the periodic legacy SIB1 transmission).
  • the DU 105A may determine to activate the on-demand SIB1 transmission mode for the second cell 122. In this case, the DU 105A may indicate its activation decision to the CU 108 over the F1 interface.
  • the CU 108 transmits, to a user device 100, via the DU 105A, the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell 122 on the second cell 122 (i.e., the WUS configuration information of the second cell 122).
  • the CU 108 may transmit the configuration information to the DU 105A
  • the DU 105A may transmit or forward the configuration information to the user device 100 on the first cell 121.
  • the DU 105A may broadcast the configuration information in a system information block of the first cell 121.
  • the user device 100 receives and stores the configuration information.
  • the CU 108 may also transmit, to the user device 100, via the DU 105A, the duration information indicating the validity duration of the on-demand SIB1 transmission mode of the second cell 122.
  • the duration information may be transmitted together with the configuration information, or separately from the configuration information.
  • the CU 108 transmits, to the DU 105A, a request for updating a master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that an SIB1 transmission (e.g., the periodic legacy SIB1 transmission) is deactivated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the DU 105A receives the request.
  • the DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the DU 105A may update the ssb-SubcarrierOffset information element and the pdcch- ConfigSI B 1 information element in the MIB, as described above with reference to FIG. 3.
  • the DU 105A stops the SIB1 transmission (broadcast) for the second cell 122 based on updating the master information block, and the second cell 122 enters the on-demand SIB1 transmission mode.
  • the DU 105A transmits, to the CU 108, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is activated for the second cell 122, and/or that the SIB1 transmission is deactivated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the CU 108 receives the response.
  • the user device 100 detects that the one or more conditions (indicated in the configuration information received at 1104) for transmitting the wake-up signal are fulfilled within the validity duration.
  • the one or more conditions for transmitting the wake-up signal may be related to at least one of: one or more radio conditions of the user device 100, or a presence of uplink data to be transmitted from the user device 100.
  • the one or more radio conditions refer to the quality of the wireless communication channel between the user device 100 and the network (e.g., the DU 105A). Factors such as signal strength, interference, and noise may affect the one or more radio conditions.
  • the presence of uplink data to be transmitted from the user device 100 means that when the user device 100 has data to send in the uplink, the user device 100 may trigger the transmission of the wake-up signal.
  • the user device 100 transmits the wake-up signal to the DU 105A based on the configuration information and within the validity duration.
  • the DU 105A monitors for the wake-up signal based on the configuration information, and receives the wake-up signal from the user device 100.
  • the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122, towards which the user device 100 is requesting the on- demand SIB1 transmission.
  • the purpose of the wake-up signal is to trigger the transmission of the on-demand SIB1 transmission of the second cell 122, which is in the on-demand SIB1 transmission mode (i.e., a type of energy-saving state).
  • the DU 105A transmits or forwards, to the CU 108, the wake-up signal transmitted from the user device 100, wherein the wake-up signal comprises or indicates the identifier (e.g., PCI) associated with the second cell 122.
  • the DU 105A may transmit the wake-up signal to the CU 108 over the F1 interface.
  • the CU 108 receives the wake-up signal from the DU 105A.
  • the CU 108 identifies the configuration and/or the content for the on-demand SIB1 of the second cell 122 based on the identifier comprised in the wake-up signal. In other words, the CU 108 identifies the OD-SIB1 information from the received PCI and then triggers the transmission of the on-demand SIB1 of the second cell 122.
  • the CU 108 transmits, to the DU 105A, a request for transmitting the on-demand SIB1 of the second cell 122 to the user device 100 (or for broadcasting the on-demand SIB1 of the second cell 122 on the first cell 121 or on the second cell 122), wherein the request comprises the configuration and the content for the on-demand SIB1 (provided by the DU 105A at 1101), which were identified based on the wake-up signal.
  • the CU 108 may transmit the request over the F1 interface in a gNB CU configuration update message.
  • the DU 105A receives the request.
  • the DU 105A transmits the on-demand SIB1 of the second cell 122 to the user device 100 (or broadcasts the on-demand SIB1 of the second cell 122 on the first cell 121 or on the second cell 122) based on the configuration of the on-demand SIB1 procedure towards the second cell 122.
  • the user device 100 receives the on-demand SIB1 of the second cell 122.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SIB1 , or transmitting the on-demand SIB1 via unicast or groupcast to the user device 100 that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast).
  • the user device 100 synchronizes with the second cell 122 and reads and stores the on-demand SIB1 of the second cell 122.
  • the on-demand SIB1 comprises the minimum system information needed for initial access to the second cell 122.
  • the user device 100 accesses the second cell 122 based on the on-demand SIB1 of the second cell 122.
  • the CU 108 determines to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration).
  • the DU 105A may determine to deactivate the on-demand SIB1 transmission mode for the second cell 122 (e.g., at the end of the validity duration). In this case, the DU 105A may indicate its deactivation decision to the CU 108 over the F1 interface.
  • the CU 108 transmits, to the DU 105A, a request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the request may be transmitted over the F1 interface in a gNB CU configuration update message.
  • the DU 105A receives the request.
  • the DU 105A updates the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122 (i.e., the legacy SIB1 transmission mode is resumed).
  • the DU 105A stops transmitting (or broadcasting) the configuration information associated with the wake-up signal, stops transmitting (or broadcasting) the on-demand SIB1 of the second cell 122, and starts the SIB1 transmission for the second cell 122, based on updating the master information block to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell, and/or that the SIB1 transmission is activated for the second cell.
  • the DU 105A transmits, to the CU 108, a response indicating an acknowledgement to the request for updating the master information block of the second cell 122 to indicate that the on-demand SIB1 transmission mode is deactivated for the second cell 122, and/or that the SIB1 transmission is activated for the second cell 122.
  • the response may be transmitted over the F1 interface in a gNB CU configuration update acknowledgement message.
  • the CU 108 receives the response.
  • the user device 100 discards or erases the configuration information associated with the wake-up signal based on detecting that the validity duration has expired, or based on detecting that the transmission (or broadcast) of the WUS configuration information and/or the on-demand SIB1 of the second cell 122 has been stopped on the first cell 121. Alternatively, the user device 100 may keep the configuration information without using it after the validity duration has expired.
  • FIG. 12 illustrates a flow chart according to an example embodiment of a method for signaling to support on- demand SIB1.
  • the method of FIG. 12 may be performed by the first central unit 108 of FIGS. 3 to 5 controlling the first cell 121.
  • the first central unit receives, from a second central unit controlling a second cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on- demand system information block type one (SIB1 ) of the second cell.
  • SIB1 system information block type one
  • the wake-up signal is intended for requesting the on-demand SIB1 of the second cell, and the first central unit receives the configuration information for transmitting the wake-up signal.
  • the first central unit broadcasts the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell.
  • the configuration information may indicate one or more conditions related to the wake-up signal.
  • the request may comprise duration information indicating a validity duration of the configuration information associated with the wake-up signal.
  • the first central unit may broadcast the duration information.
  • the first central unit may transmit, to the second central unit, a response message indicating that the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell is being broadcasted on the first cell.
  • the first central unit may determine to generate and/or transmit the response message based on broadcasting the configuration information on the first cell.
  • the first central unit may receive, from a first distributed unit controlling the first cell, the configuration information associated with the wake-up signal; and store the configuration information received from the first distributed unit (prior to broadcasting it).
  • the first central unit may receive, from the second central unit, the configuration information associated with the wake-up signal; and store the configuration information received from the second central unit (prior to broadcasting it).
  • the request received from the second central unit may comprise an identifier associated with the second cell, a configuration for an on-demand SIB1 procedure towards the second cell, and a content of the on-demand SIB1 of the second cell.
  • the first central unit may receive, from a first distributed unit controlling the first cell, the wake-up signal transmitted from a user device, wherein the wake-up signal indicates the identifier associated with the second cell; identify the configuration for the on-demand SIB1 procedure based on the identifier indicated in the wake-up signal; and transmit, to the first distributed unit, a request for transmitting the on-demand SIB1 of the second cell, wherein the request transmitted to the first distributed unit comprises the configuration for the on-demand SIB1 procedure, and the content of the on-demand SIB1 of the second cell.
  • the first central unit may determine to generate and/or transmit the request to the first distributed unit based on the identification.
  • the first central unit may receive, from a first distributed unit controlling the first cell, the wake-up signal transmitted from a user device, wherein the wake-up signal indicates an identifier associated with the second cell; identify the second central unit based on the identifier indicated in the wake-up signal; and transmit the wakeup signal to the second central unit.
  • the first central unit may determine to transmit the wake-up signal to the second central unit based on the identification.
  • the first central unit may receive, from the second central unit, a request to stop broadcasting the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell; stop broadcasting the configuration information associated with the wake-up signal, based on receiving the request to stop the broadcasting; and transmit, to the second central unit, a response message indicating that the broadcasting of the configuration information associated with the wake-up signal is stopped.
  • the first central unit may determine to generate and/or transmit the response message based on stopping the broadcasting.
  • FIG. 13 illustrates a flow chart according to an example embodiment of a method for signaling to support on- demand SIB1. The method of FIG. 13 may be performed by the second central unit 108B of FIGS. 3 to 5 controlling the second cell 122.
  • the second central unit transmits, to a first central unit controlling a first cell, a request to broadcast configuration information associated with a wake-up signal for requesting an on-demand system information block type one (SIB1 ) of the second cell.
  • SIB1 system information block type one
  • the request transmitted to the first central unit may comprise duration information indicating a validity duration of the configuration information associated with the wake-up signal.
  • the request transmitted to the first central unit may comprise an identifier associated with the second cell, a configuration for an on-demand SIB1 procedure towards the second cell, and a content of the on-demand SIB1 of the second cell.
  • the second central unit may receive, from the first central unit, a response message (in response to the transmitted request) indicating that the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell is being broadcasted on the first cell.
  • the second central unit transmits, to a second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • the SIB1 transmission may refer to a non-on-demand SIB1 transmission, such as a periodic legacy SIB1 transmission or broadcast.
  • the second central unit may determine to transmit the request for updating the master information block based on transmitting the request to the first central unit, or based on receiving the response message from the first central unit.
  • the second central unit may receive, from the second distributed unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • the second central unit may receive, from the first central unit, the wake-up signal transmitted from a user device, wherein the wake-up signal indicates an identifier associated with the second cell; identify the second distributed unit based on the identifier indicated in the wake-up signal; and transmit, to the second distributed unit, a request for transmitting the on-demand SIB1 of the second cell.
  • the second central unit may determine, based on the identification, to generate and/or transmit the request to the second distributed unit.
  • the second central unit may receive, from the second distributed unit, the configuration information associated with the wake-up signal; and transmit, to the first central unit, the configuration information associated with the wakeup signal, wherein the configuration information may indicate one or more conditions related to the wake-up signal.
  • the second central unit may receive, from the second distributed unit, the wake-up signal transmitted from a user device, wherein the wake-up signal indicates an identifier associated with the second cell; and transmit, to the second distributed unit, a request for transmitting an on-demand SIB1 of the second cell.
  • the second central unit may determine, based on the identifier, to generate and/or transmit the request to the second distributed unit.
  • the second central unit may transmit, to the second distributed unit, based on determining to deactivate the on-demand SIB1 transmission mode, a request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell; and receive, from the second distributed unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell.
  • the second central unit may transmit, to the first central unit, a request to stop broadcasting the configuration information associated with the wake-up signal for requesting the on-demand SIB1 of the second cell; and receive, from the first central unit, a response message indicating that the broadcasting of the configuration information associated with the wake-up signal is stopped.
  • the second central unit may determine to generate and/or transmit the request to stop the broadcasting, based on determining to deactivate the on-demand SIB1 mode of the second cell.
  • the second distributed unit receives, from a second central unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one (SIB1) transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • SIB1 system information block type one
  • the second distributed unit updates, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • the second distributed unit may transmit, to the second central unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • the second distributed unit may determine to generate and/or transmit the response based on updating the master information block successfully.
  • the second distributed unit may stop the SIB1 transmission for the second cell based on updating the master information block.
  • the second distributed unit may transmit, to the second central unit, configuration information associated with a wake-up signal for requesting an on-demand SIB1 of the second cell.
  • the second distributed unit may monitor for the wake-up signal based on the configuration information; receive the wake-up signal from a user device, wherein the wake-up signal indicates an identifier associated with the second cell; and transmit the wake-up signal to the second central unit.
  • the second distributed unit may receive, from the second central unit, a request for transmitting an on-demand SIB1 of the second cell; and transmit the on-demand SIB1 of the second cell based on the request.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SI B1, or transmitting the on-demand SIB1 via unicast or groupcast to the user device that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast on the second cell).
  • the second distributed unit may receive, from the second central unit, a request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that an SIB1 transmission is activated for the second cell; update, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell; transmit, to the second central unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell; and start the SIB1 transmission for the second cell based on updating the master information block to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell;
  • FIG. 15 illustrates a flow chart according to an example embodiment of a method for signaling to support on- demand SIB1. The method of FIG. 15 may be performed by the user device 100 of FIGS. 3 to 11.
  • the user device receives, from a first cell or from a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one, SI B1 of the second cell.
  • the configuration information may be received from the first cell controlled by a first distributed unit, or from the second cell controlled by a second distributed unit.
  • the user device may be unaware of CUs and DUs, and it may only know its cell.
  • the first cell and the second cell may be controlled by a base station (without a CU-DU split).
  • the first cell may be controlled by a first base station (without a CU-DU split)
  • the second cell may be controlled by a second base station (without a CU-DU split) different from the first base station.
  • the user device may store the configuration information received from the first cell or from the second cell.
  • the user device receives, from the first cell or from the second cell, duration information indicating a validity duration of the configuration information associated with the wake-up signal.
  • the duration information may be received from the first cell controlled by the first distributed unit, or from the second cell controlled by the second distributed unit.
  • the first cell and the second cell may be controlled by a base station (without a CU-DU split).
  • the first cell may be controlled by a first base station (without a CU-DU split)
  • the second cell may be controlled by a second base station (without a CU- DU split) different from the first base station.
  • the validity duration may be related to a duration of an on-demand SIB1 transmission mode of the second cell.
  • the user device transmits the wake-up signal based on the configuration information and within the validity duration, wherein the wake-up signal indicates an identifier associated with the second cell.
  • the wake-up signal may be transmitted to the first cell controlled by the first distributed unit, or to the second cell controlled by the second distributed unit.
  • the first cell and the second cell may be controlled by a base station (without a CU-DU split).
  • the first cell may be controlled by a first base station (without a CU-DU split)
  • the second cell may be controlled by a second base station (without a CU-DU split) different from the first base station.
  • the user device receives the on-demand SIB1 of the second cell from the first cell or from the second cell.
  • the on-demand SIB1 of the second cell may be received from the first cell controlled by the first distributed unit, or from the second cell controlled by the second distributed unit.
  • the first cell and the second cell may be controlled by a base station (without a CU-DU split).
  • the first cell may be controlled by a first base station (without a CU-DU split)
  • the second cell may be controlled by a second base station (without a CU-DU split) different from the first base station.
  • the configuration information may indicate one or more conditions related to the wake-up signal.
  • the user device may transmit the wake-up signal based on determining that the one or more conditions are fulfilled within the validity duration.
  • the one or more conditions may be related to at least one of: one or more radio conditions of the user device, or a presence of uplink data to be transmitted from the user device.
  • the user device may keep the configuration information without using the configuration information after the validity duration has expired, for example based on detecting that the validity duration has expired, or based on detecting that the first cell or the second cell is no longer broadcasting the configuration information.
  • the user device may discard the configuration information associated with the wake-up signal after the validity duration has expired, for example based on detecting that the validity duration has expired, or based on detecting that the first cell or the second cell is no longer broadcasting the configuration information.
  • FIG. 16 illustrates a flow chart according to an example embodiment of a method for signaling to support on-demand SIB1. The method of FIG. 16 may be performed by the central unit 108 of FIGS. 7 to 11.
  • the central unit receives, from a first distributed unit controlling a first cell or from a second distributed unit controlling a second cell, configuration information associated with a wake-up signal for requesting an on-demand system information block type one (SIB1 ) of the second cell.
  • SIB1 system information block type one
  • the central unit may store the configuration information received from the first distributed unit or from the second distributed unit.
  • the central unit broadcasts the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit. This may mean that the central unit prepares a system information message comprising the configuration information associated with the wake-up signal, and the system information message is then broadcasted either by the first cell via the first distributed unit or by the second cell via the second distributed unit.
  • the configuration information may indicate one or more conditions related to the wake-up signal.
  • the central unit transmits, to the second distributed unit controlling the second cell, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand SIB1 transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • the central unit may determine to generate and/or transmit the request for updating the master information block based on or in response to broadcasting the configuration information.
  • the central unit may receive, from the second distributed unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • the central unit may receive, from the second distributed unit, duration information indicating a validity duration of the configuration information associated with the wake-up signal; and broadcast the duration information via the first distributed unit or via the second distributed unit.
  • the central unit may receive, from the second distributed unit, a configuration for an on-demand SIB1 procedure towards the second cell, and/or a content for the on-demand SIB1 of the second cell.
  • the central unit may receive the wake-up signal from a user device via the first distributed unit, wherein the wake-up signal indicates an identifier associated with the second cell; identify the configuration for the on-demand SIB1 procedure based on the identifier indicated in the wake-up signal; and transmit, to the first distributed unit, based on the identification, a request for transmitting the on-demand SIB1 of the second cell, wherein the request comprises the configuration for the on-demand SIB1 procedure, and the content of the on-demand SIB1 of the second cell.
  • the central unit may receive the wake-up signal from a user device via the first distributed unit, wherein the wake-up signal indicates an identifier associated with the second cell; identify the configuration for the on-demand SIB1 procedure based on the identifier indicated in the wake-up signal; and transmit, to the second distributed unit, based on the identification, a request for transmitting the on-demand SIB1 of the second cell.
  • the central unit may receive the wake-up signal from a user device via the second distributed unit, wherein the wake-up signal indicates an identifier associated with the second cell; identify the configuration for the on-demand SIB1 procedure based on the identifier indicated in the wake-up signal; and transmit, to the second distributed unit, based on the identification, a request for transmitting the on-demand SIB1 of the second cell.
  • the central unit may transmit, to the second distributed unit, based on determining to deactivate the on- demand SIB1 transmission mode for the second cell, a request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell; and receive, from the second distributed unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell.
  • the central unit may, based on determining to deactivate the on-demand SIB1 transmission mode for the second cell, stop broadcasting the configuration information associated with the wake-up signal via the first distributed unit or via the second distributed unit.
  • FIG. 17 illustrates a flow chart according to an example embodiment of a method for signaling to support on- demand SIB1.
  • the method of FIG. 17 may be performed by the first distributed unit 105 of FIGS. 7 to 10 controlling the first cell 121.
  • the first distributed unit receives, from a central unit, configuration information associated with a wake-up signal for requesting an on-demand system information block type one (SIB1 ) of a second cell.
  • SIB1 system information block type one
  • the first distributed unit may transmit, to the central unit, the configuration information associated with the wake-up signal, prior to receiving the configuration information to be broadcasted.
  • the first distributed unit broadcasts the configuration information on the first cell.
  • the first distributed unit may determine to broadcast the configuration information based on receiving the configuration information from the central unit.
  • the configuration information may indicate one or more conditions related to the wake-up signal.
  • the first distributed unit may receive, from the central unit, duration information indicating a validity duration of the configuration information associated with the wake-up signal; and broadcast the duration information on the first cell.
  • the first distributed unit may determine to broadcast the duration information based on receiving the duration information from the central unit.
  • the first distributed unit may monitor for the wake-up signal based on the configuration information; receive the wake-up signal from a user device, wherein the wake-up signal indicates an identifier associated with the second cell; and transmit the wake-up signal to the central unit.
  • the first distributed unit may determine to transmit the wakeup signal to the central unit based on the identifier indicated in the wake-up signal.
  • the first distributed unit may receive, from the central unit, a request for transmitting the on-demand SIB1 of the second cell, wherein the request comprises a configuration for an SIB1 procedure towards the second cell, and a content of the on-demand SIB1 of the second cell; and transmit the on-demand SIB1 of the second cell based on the configuration.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SIB1, or transmitting the on-demand SIB1 via unicast or groupcast to the user device that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast on the first cell).
  • FIG. 18 illustrates a flow chart according to an example embodiment of a method for signaling to support on- demand SIB1.
  • the method of FIG. 18 may be performed by the second distributed unit 105A of FIGS. 7 to 11 controlling the second cell 122.
  • the second distributed unit receives, from a central unit, a request for updating a master information block of the second cell to indicate at least one of: that an on-demand system information block type one (SIB1 ) transmission mode is activated for the second cell, or that an SIB1 transmission is deactivated for the second cell.
  • SIB1 system information block type one
  • the second distributed unit updates, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • the second distributed unit may transmit, to the central unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is activated for the second cell, or that the SIB1 transmission is deactivated for the second cell.
  • the second distributed unit may determine to generate and/or transmit the response based on updating the master information block successfully.
  • the second distributed unit may stop the SIB1 transmission of the second cell based on updating the master information block.
  • the second distributed unit may receive, from the central unit, a request for transmitting an on-demand SIB1 of the second cell; and transmit the on-demand SIB1 of the second cell based on the request.
  • the transmission of the on-demand SIB1 may comprise, for example, broadcasting the on-demand SIB1 , or transmitting the on-demand SIB1 via unicast or groupcast to the user device that requested the on-demand SIB1 via the wake-up signal (i.e., the transmission may be UE-specific or UE-group specific or a broadcast on the second cell).
  • the second distributed unit may transmit, to the central unit, configuration information associated with a wakeup signal for requesting an on-demand SIB1 of the second cell, wherein the configuration information may indicate one or more conditions related to the wake-up signal.
  • the second distributed unit may transmit, to the central unit, duration information indicating a validity duration of the configuration information associated with the wake-up signal.
  • the second distributed unit may broadcast the configuration information on the second cell; and broadcast the duration information on the second cell.
  • the second distributed unit may monitor for the wake-up signal based on the configuration information; receive the wake-up signal from a user device, wherein the wake-up signal indicates an identifier associated with the second cell; and transmit the wake-up signal to the central unit.
  • the second distributed unit may determine to transmit the wake-up signal to the central unit based on the identifier indicated in the wake-up signal.
  • the second distributed unit may receive, from the central unit, a request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that an SIB1 transmission is activated for the second cell; update, based on the request, the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell; start the SIB1 transmission of the second cell based on updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, or that the SIB1 transmission is activated for the second cell; and transmit, to the central unit, a response indicating an acknowledgement to the request for updating the master information block of the second cell to indicate at least one of: that the on-demand SIB1 transmission mode is deactivated for the second cell, and that the SIB1 transmission is activated
  • the blocks, related functions, and information exchanges (messages) described above by means of FIGS. 3 to 18 are in no absolute chronological order, and some of them may be performed simultaneously or in an order differing from the described one. Other functions can also be executed between them or within them, and other information may be sent, and/or other rules applied. Some of the blocks or part of the blocks or one or more pieces of information can also be left out or replaced by a corresponding block or part of the block or one or more pieces of information.
  • first distributed unit or first DU
  • second distributed unit or second DU
  • first distributed unit or first DU
  • second distributed unit or second DU
  • first cell and “second cell” are used to distinguish the cells, and they do not necessarily mean a specific order or specific identifiers of the cells.
  • FIG. 19 illustrates an example of an apparatus 1900 comprising means for performing one or more of the example embodiments described above.
  • the apparatus 1900 may be, or comprise, or be comprised in, the user device 100.
  • the apparatus 1900 may comprise a circuitry or a chipset applicable for realizing one or more of the example embodiments described above.
  • the apparatus 1900 may comprise at least one processor 1910.
  • the at least one processor 1910 interprets instructions (e.g., computer program instructions) and processes data.
  • the at least one processor 1910 may comprise one or more programmable processors.
  • the at least one processor 1910 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 at least one processor 1910 is coupled to at least one memory 1920.
  • the at least one processor is configured to read and write data to and from the at least one memory 1920.
  • the at least one memory 1920 may comprise one or more memory units.
  • the memory units may be volatile or non-volatile. It is to be noted that 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.
  • memories may be referred to as non-transitory computer readable media.
  • the term “non-transitory,” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM).
  • the at least one memory 1920 stores computer readable instructions that are executed by the at least one processor 1910 to perform one or more of the example embodiments described above.
  • non-volatile memory stores the computer readable instructions
  • the at least one processor 1910 executes the instructions using volatile memory for temporary storage of data and/or instructions.
  • the computer readable instructions may refer to computer program code.
  • the computer readable instructions may have been pre-stored to the at least one memory 1920 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 by the at least one processor 1910 causes the apparatus 1900 to perform one or more of the example embodiments described above. That is, the at least one processor and the at least one memory storing the instructions may provide the means for providing or causing the performance of any of the methods and/or blocks 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 term “non-transitory,” as used herein, is a limitation of the medium itself (i.e. , tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM).
  • the apparatus 1900 may further comprise, or be connected to, an input unit 1930.
  • the input unit 1930 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 1930 may comprise an interface to which external devices may connect to.
  • the apparatus 1900 may also comprise an output unit 1940.
  • 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 1940 may further comprise one or more audio outputs.
  • the one or more audio outputs may be for example loudspeakers.
  • the apparatus 1900 further comprises a connectivity unit 1950.
  • the connectivity unit 1950 enables wireless connectivity to one or more external devices.
  • the connectivity unit 1950 comprises at least one transmitter and at least one receiver that may be integrated to the apparatus 1900 or that the apparatus 1900 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 1950 may comprise an integrated circuit or a set of integrated circuits that provide the wireless communication capability for the apparatus 1900.
  • the wireless connectivity may be a hardwired application-specific integrated circuit (ASIC).
  • ASIC application-specific integrated circuit
  • the connectivity unit 1950 may also provide means for performing at least some of the blocks or functions of one or more example embodiments described above.
  • the connectivity unit 1950 may comprise one or more components, such as: 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
  • demodulator demodulator
  • encoder/decoder circuitries controlled by the corresponding controlling units.
  • FIG. 20 illustrates an example of an apparatus 2000 comprising means for performing one or more of the example embodiments described above.
  • the apparatus 2000 may be, or comprise, or be comprised in, the first central unit 108, the second central unit 108B, the first distributed unit 105, or the second distributed unit 105A, 105B.
  • the apparatus 2000 may comprise, for example, a circuitry or a chipset applicable for realizing one or more of the example embodiments described above.
  • the apparatus 2000 may be an electronic device comprising one or more electronic circuitries.
  • the apparatus 2000 may comprise a communication control circuitry 2010 such as at least one processor, and at least one memory 2020 storing instructions 2022 which, when executed by the at least one processor, cause the apparatus 2000 to carry out one or more of the example embodiments described above.
  • Such instructions 2022 may, for example, include computer program code (software).
  • the at least one processor and the at least one memory storing the instructions may provide the means for providing or causing the performance of any of the methods and/or blocks described above.
  • the processor is coupled to the memory 2020.
  • the processor is configured to read and write data to and from the memory 2020.
  • the memory 2020 may comprise one or more memory units.
  • the memory units may be volatile or non-volatile. It is to be noted that 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 term “non-transitory,” as used herein, is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs. ROM).
  • the memory 2020 stores computer readable instructions that are executed by the processor.
  • non-volatile memory stores the computer readable instructions, and the processor 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 2020 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 2000 to perform one or more of the functionalities described above.
  • the memory 2020 may be implemented using any suitable data storage technology, such as semiconductorbased 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, such as a current neighbour cell list, and, in some example embodiments, structures of frames used in the detected neighbour cells.
  • the apparatus 2000 may further comprise or be connected to a communication interface 2030, such as a radio unit, comprising hardware and/or software for realizing communication connectivity with one or more wireless communication devices according to one or more communication protocols.
  • the communication interface 2030 comprises at least one transmitter (Tx) and at least one receiver (Rx) that may be integrated to the apparatus 2000 or that the apparatus 2000 may be connected to.
  • the communication interface 2030 may provide means for performing some of the blocks and/or functions (e.g., transmitting and receiving) for one or more example embodiments described above.
  • the communication interface 2030 may comprise one or more components, such as: 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
  • demodulator demodulator
  • encoder/decoder circuitries controlled by the corresponding controlling units.
  • the communication interface 2030 provides the apparatus with communication capabilities to communicate in the wireless communication network.
  • the communication interface may, for example, provide a radio interface to one or more UEs 100, 102.
  • the apparatus 2000 may further comprise or be connected to another interface towards a core network 110, such as the network coordinator apparatus or AMF, and/or to other access nodes or DUs or CUs of the wireless communication network.
  • the apparatus 2000 may further comprise a scheduler that is configured to allocate radio resources.
  • the scheduler may be configured along with the communication control circuitry 2010 or it may be separately configured.
  • the apparatus 2000 may further comprise various components not illustrated in FIG. 20.
  • the various components may be hardware components and/or software components.
  • 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.
  • 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 example 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 combination
  • 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.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention divulgue un procédé comprenant la réception, en provenance d'une première cellule ou d'une seconde cellule, d'informations de configuration associées à un signal de réveil, WUS, pour demander un type 1 de bloc d'informations système, SIB1, sur demande de la seconde cellule ; la réception, en provenance de la première cellule ou de la seconde cellule, des informations de durée indiquant une durée de validité des informations de configuration associées au signal de réveil ; la transmission du signal de réveil sur la base des informations de configuration et pendant la durée de validité, le signal de réveil indiquant un identifiant associé à la seconde cellule ; et la réception du bloc SIB1 sur demande (OD-SIB1) de la seconde cellule en provenance de la première cellule ou de la seconde cellule.
PCT/EP2025/053444 2024-04-05 2025-02-10 Signalisation pour prendre en charge un type 1 de bloc d'informations système sur demande Pending WO2025209703A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024035018A1 (fr) * 2022-08-08 2024-02-15 엘지전자 주식회사 Procédé, équipement utilisateur, dispositif de traitement, support de stockage et programme informatique permettant de recevoir un signal de liaison descendante, et procédé et station de base permettant de transmettre un signal de liaison descendante

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024035018A1 (fr) * 2022-08-08 2024-02-15 엘지전자 주식회사 Procédé, équipement utilisateur, dispositif de traitement, support de stockage et programme informatique permettant de recevoir un signal de liaison descendante, et procédé et station de base permettant de transmettre un signal de liaison descendante

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BRIAN CLASSON ET AL: "Discussion of on-demand SIB1 for idle/inactive mode UEs", vol. RAN WG1, no. Athens, GR; 20240226 - 20240301, 16 February 2024 (2024-02-16), XP052567884, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/TSG_RAN/WG1_RL1/TSGR1_116/Docs/R1-2400098.zip R1-2400098.docx> [retrieved on 20240216] *
JIANHUI LI ET AL: "Discussion on on-demand SIB1 for RRC IDLE and INACTIVE UE", vol. RAN WG2, no. Changsha, Hunan Province, CN; 20240415 - 20240419, 3 April 2024 (2024-04-03), XP052584535, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/TSG_RAN/WG2_RL2/TSGR2_125bis/Docs/R2-2402569.zip R2-2402569_Discussion on on-demand SIB1 for RRC IDLE and INACTIVE UE.doc> [retrieved on 20240403] *
MIN ZHU ET AL: "Discussion on on-demand SIB1", vol. RAN WG1, no. Changsha, Hunan Province, CN; 20240415 - 20240419, 4 April 2024 (2024-04-04), XP052586395, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/TSG_RAN/WG1_RL1/TSGR1_116b/Docs/R1-2402390.zip R1-2402390.docx> [retrieved on 20240404] *

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