WO2024035117A1 - Procédé et appareil de gestion de priorités de resélection de cellule basée sur la tranche - Google Patents

Procédé et appareil de gestion de priorités de resélection de cellule basée sur la tranche Download PDF

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Publication number
WO2024035117A1
WO2024035117A1 PCT/KR2023/011757 KR2023011757W WO2024035117A1 WO 2024035117 A1 WO2024035117 A1 WO 2024035117A1 KR 2023011757 W KR2023011757 W KR 2023011757W WO 2024035117 A1 WO2024035117 A1 WO 2024035117A1
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Prior art keywords
slice
nsag
frequency
information
cell reselection
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PCT/KR2023/011757
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English (en)
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Aby Kanneath ABRAHAM
Sangyeob JUNG
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Samsung Electronics Co., Ltd.
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Publication of WO2024035117A1 publication Critical patent/WO2024035117A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • 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

Definitions

  • the present disclosure relates to a wireless communication, and more specifically, the present disclosure relates to methods and a User Equipment (UE) for handling slice based cell reselection priorities.
  • UE User Equipment
  • 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in “Sub 6GHz” bands such as 3.5GHz, but also in “Above 6GHz” bands referred to as mmWave including 28GHz and 39GHz.
  • 6G mobile communication technologies referred to as Beyond 5G systems
  • terahertz bands for example, 95GHz to 3THz bands
  • IIoT Industrial Internet of Things
  • IAB Integrated Access and Backhaul
  • DAPS Dual Active Protocol Stack
  • 5G baseline architecture for example, service based architecture or service based interface
  • NFV Network Functions Virtualization
  • SDN Software-Defined Networking
  • MEC Mobile Edge Computing
  • multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also full-duplex technology for increasing frequency efficiency of 6G mobile communication technologies and improving system networks, AI-based communication technology for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technology for implementing services at levels of complexity exceeding the limit of UE operation capability by utilizing ultra-high-performance communication and computing resources.
  • FD-MIMO Full Dimensional MIMO
  • OAM Organic Angular Momentum
  • RIS Reconfigurable Intelligent Surface
  • an aspect of the present invention provides a method and apparatus for handling slice based cell reselection priorities.
  • the principal object of the embodiments herein is to provide methods and a UE for handling slice based cell reselection priorities.
  • Another object of the embodiments herein is to provide that upon receiving slice information (i.e., sliceInfo) for two frequencies F1 and F2, where the sliceInfo for F1 doesn't contain NSAG cell reselection priority and sliceInfo for F2 contain NSAG cell reselection priority set as zero, the UE considers both F1 and F2 are equal priorities.
  • sliceInfo i.e., sliceInfo
  • Another object of the embodiments herein is to provide that upon receiving RRC Release with slice information without any priority, the UE ignores any priorities received in a SIB2 and a SIB4.
  • Another object of the embodiments herein is to provide that upon receiving the RRC Release with slice information, the UE considers only the NSAG-Frequency pair present in the FreqPriorityListDedicatedSlicing (i.e. dedicated signalling) irrespective of the presence of NSAG-Frequency pair in FreqPrioritySlicing (i.e. system information).
  • the embodiments herein provide a method for handling slice based cell reselection priorities.
  • the method may include receiving, by a UE, a RRC message including a slice information for a Network Slice AS Groups (NSAG) at a frequency and without any priority information. Further, the method includes receiving, by the UE, a RRC message including a slice information for a NSAG including priority information for a NSAG at another frequency. Further, the method includes determining, by the UE, whether the RRC message includes the slice information with the priority information or the slice information without the priority information.
  • NSAG Network Slice AS Groups
  • the method includes determining, by the UE, a lowest priority value for the frequency when the RRC message includes the slice information without the priority information, where the lowest priority value is lower than any of the priority information configured for the frequency. Further, the method includes performing, by the UE, cell reselection based on the lowest priority value for the frequency and the slice information.
  • the method may include configuring, by the UE, to ignore the priority information received in at least one system information block (SIB) and performing slice based cell reselection using only the NSAG-Frequency pairs without priority information received in a RRC Release when the RRCRelease includes the slice information including NSAG-Frequency pairs without including the priority information for all the NSAG-Frequency pairs and the RRC Release does not comprises NR frequencies or E-UTRA frequencies associated to non-slice specific priorities.
  • SIB system information block
  • the method may include performing the slice based cell reselection by considering only the NSAG-frequency pairs indicated in the FreqPriorityListDedicatedSlicing.
  • the priority information includes at least one of a nsag-CellReselectionPriority, a nsag-CellReselectionSubPriority,CellReselectionPriority and CellReselectionSubPriority.
  • the RRC message may be an RRCRelease or the SIB.
  • the SIB may be one of a SIB2 and a SIB4.
  • the method may include receiving, by the UE, slice information for a first frequency (F1) and a second frequency (F2).
  • the slice information for the F1 doesn't include the priority information and the slice information for the F2 includes the priority information set as zero.
  • the method includes determining, by the UE, the F2 is higher priority than the F1 when the F1 doesn't include the priority information and the F2 includes the priority information set as zero.
  • the embodiments herein provide a UE for handling slice based cell reselection priorities.
  • the UE may include a slice based cell reselection controller communicatively coupled to a memory and a processor.
  • the slice based cell reselection controller is configured to receive a RRC message including a slice information for a NSAG at a frequency and without any priority information. Further, the slice based cell reselection controller is configured to receive a RRC message including a slice information for a NSAG including priority information for a NSAG at another frequency. Further, the slice based cell reselection controller is configured to determine whether the RRC message includes the slice information with the priority information or the slice information without the priority information.
  • the slice based cell reselection controller is configured to determine a lowest priority value for the frequency when the RRC message includes the slice information without the priority information. The lowest priority value is lower than any of the priority information configured for the frequency. Further, the slice based cell reselection controller is configured to perform cell reselection based on the lowest priority value for the frequency and the slice information.
  • FIG. 1 illustrates a wireless network for handling slice based cell reselection priorities, according to the embodiments as disclosed herein;
  • FIG. 2A shows various hardware components of a UE, according to the embodiments as disclosed herein;
  • FIG. 2B shows various hardware components of a network apparatus, according to the embodiments as disclosed herein;
  • FIG. 3 is a flow chart illustrating a method for handling slice based cell reselection priorities, according to the embodiments as disclosed herein;
  • FIG. 4 is a flow chart illustrating a method for handling of RRC Release with slice Information without any priority, according to the embodiments as disclosed herein;
  • FIG. 5 is a flow chart illustrating a method for handling slice based prioritisation b/w NSAG cell reselection priority absent and NSAG cell reselection priority is zero, according to the embodiments as disclosed herein;
  • FIG. 6 is a flow chart illustrating a method for handling slice based cell reselection using derived priorities, according to the embodiments as disclosed herein.
  • Couple and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another.
  • transmit and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication.
  • the term “or” is inclusive, meaning and/or.
  • controller means any device, system, or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely.
  • phrases "at least one of,” when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item in the list may be needed.
  • “at least one of: A, B, and C” includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.
  • various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium.
  • application and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code.
  • computer readable program code includes any type of computer code, including source code, object code, and executable code.
  • computer readable medium includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory.
  • ROM read only memory
  • RAM random access memory
  • CD compact disc
  • DVD digital video disc
  • a "non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links that transport transitory electrical or other signals.
  • a non-transitory computer readable medium includes media where data can be permanently stored and media where data can be stored and later overwritten, such as a rewritable optical disc or an erasable memory device.
  • a most prominent feature of fifth generation (5G) networks lies in adopting network slicing for radio access networks (RANs) and core networks (CNs). This is intended for bundling up network resources and network functions into a single independent network slice depending on individual services, allowing for application of network system function and resource isolation, customization, independent management and orchestration to mobile communication network architectures.
  • the use of such network slicing enables offering 5G services in an independent and flexible way by selecting and combining 5G system network functions according to services, users, business models, or such references.
  • a network slice always consists of a RAN part and a CN part.
  • the support of network slicing relies on the principle that traffic for different slices is handled by different Protocol Data Unit (PDU) sessions.
  • PDU Protocol Data Unit
  • the wireless network can release the different network slices by scheduling and also by providing different layer 1/layer 2 (L1/L2) configurations.
  • the network slicing is a concept to allow differentiated treatment depending on each customer requirements. With slicing, it is possible for Mobile Network Operators (MNO) to consider customers as belonging to different tenant types with each having different service requirements that govern in terms of what slice types each tenant is eligible to use based on Service Level Agreement (SLA) and subscriptions.
  • MNO Mobile Network Operators
  • the NG-RAN supported Single - Network Slice Selection Assistance Information (S-NSSAI) is configured by an Operations, Administration and Maintenance (OAM) entity. Awareness in the NG-RAN of the slices supported in the cells of the neighbours may be beneficial for inter-frequency mobility in a connected mode. It is assumed that the slice availability does not change within a UE's registration area.
  • the NG-RAN and the 5GC are responsible to handle a service request for a slice that may or may not be available in a given area.
  • the admission or rejection of access to the slice may depend by factors such as support for the slice, availability of resources, support of the requested service by the NG-RAN.
  • a UE is associated with multiple slices simultaneously, only one signalling connection is maintained and for intra-frequency cell reselection, the UE always tries to camp on a best cell.
  • NR New Radio
  • NR networks used, dedicated priorities to control the frequency on which the UE camps.
  • slice specific prioritization is introduced.
  • a serving cell can broadcast slice information including the slice support in serving as well as neighboring frequencies, slice specific priorities for serving as well as neighboring frequencies, details on the slice availability in the neighboring cells etc. There may be also some frequencies which may not be associated with any slices.
  • the UE considers the slice priorities of the slices that the UE needs/supports along with the frequency priorities for the slices during cell reselection.
  • the cell reselection is a process that identifies the cell that the UE should camp on when the UE is in a non-connected state (i.e. RRC_IDLE and RRC_INACTIVE). It is based on a cell reselection criteria.
  • An inter-frequency reselection is based on absolute priorities where the UE tries to camp on the highest priority frequency available.
  • the UE involves measurements of the serving and neighbour cells and the cell reselection can be speed dependent and in multi-beam operations.
  • a cell quality is derived amongst the beams corresponding to the same cell.
  • the UE may receive cell reselection priorities through the dedicated signalling or the broadcast signalling.
  • the legacy cell reselection i.e., cell reselection not considering slices
  • the network apparatus does not provide cell reselection priority for a certain frequency to the UE, the UE does not consider that frequency for cell reselection.
  • the absence of cell reselection priority controls whether the UE needs to perform cell reselection or not.
  • absolute priorities of different NR frequencies or inter-RAT frequencies may be provided to the UE in a system information, in a RRCRelease message, or by inheriting from another RAT at inter-RAT cell (re)selection.
  • system information an NR frequency or inter-RAT frequency may be listed without providing a priority (i.e. the field cellReselectionPriority is absent for that frequency). If any fields with cellReselectionPriority or nsag-CellReselectionPriority are provided in dedicated signalling, the UE ignores any fields with cellReselectionPriority and nsag-CellReselectionPriority provided in the system information.
  • the UE When the UE is in a camped normally state, if the UE supports slice-based cell reselection and has received NSAG(s) and their priorities from a Non-access stratum (NAS) layer, the UE derives re-selection priorities according to slice aware cell reselection rules.
  • NAS Non-access stratum
  • the NSAG or Slice Group is a group which is associated to one or more slices. If the UE has indicated that the UE supports the NSAG, an Access & Mobility Management Function (AMF) may configure the UE with NSAG Information for one or more the S-NSSAIs in a configured NSSAI, by including the NSAG Information in a Registration Accept message or a UE Configuration Command message.
  • AMF Access & Mobility Management Function
  • the AMF indicates in the NSAG Information in which tracking area (TA) a specific NSAG association to S-NSSAI(s) is valid if the AMF provides in the UE configuration a NSAG value which is used in different TAs with a different association with NSSAIs.
  • the configuration the AMF provides includes at least the NSAGs for the UE for the Tracking Area (TA)s of a Registration Area.
  • a NR UE RRC may receive NSAG and a priority associated with the NSAG from a NAS layer.
  • the NR UE RRC also may receive one of a lists- FreqPriorityListSlicing or FreqPriorityListDedicatedSlicing including a frequency provided either explicitly or as implicitly through an index to an entry in system information, a slice information list which contain as list of slice information (sliceInfo or sliceInfoDedicated) including an identifier for a NSAG and optionally the nsag-CellReselectionPriority or nsag-CellReselectionSubPriority applicable for the NSAG for the frequency, and in the case of sliceInfoDedicated , a cell list (sliceCellListNR) which includes the list of PCIs which may be either an allowed list (sliceAllowedCellListNR) or excluded list (sliceExcludedCellListNR).
  • nsag-CellReselectionPriority and nsag-CellReselectionSubPriority are optional in slice information for both sliceInfo and sliceInfoDedicated.
  • the priority used for cell reselection is a combination of both slice priority/NSAG priority received from NAS and frequency priority received from RRC.
  • sliceInformation for e.g. FreqPriorityNRSlicing
  • SIB16 One by broadcast signaling (SIB16) and other by dedicated signalling in RRC messages like RRC release).
  • SIB16 structure is given as below:
  • the UE derives slice specific cell reselection priorities when the UE performs slice-based cell reselection as below:
  • the UE derives re-selection priorities for slice-based cell re-selection by using:
  • the UE considers an NR frequency to support a slice group if
  • the corresponding nsag-ID is indicated for the NR frequency and valid for current TA.
  • the UE considers a cell on an NR frequency to support the slice group if
  • the corresponding nsag-ID is indicated for the NR frequency and valid for current TA
  • the cell is either listed in the sliceAllowedCellListNR (if provided in the used slice specific cell reselection information) or the cell is not listed in the sliceExcludedCellListNR (if provided in the used slice specific cell reselection information);or
  • the UE derives re-selection priorities for slice-based cell re-selection according to the following rules:
  • Frequencies that support at least one prioritized NSAG received from NAS have higher re-selection priority than frequencies that support none of the NSAG(s) received from NAS.
  • Frequencies that support at least one NSAG provided by NAS are prioritized in the order of the NAS-provided priority for the NSAG with highest priority supported on the frequency.
  • the frequencies are prioritized in the order of their nsag-CellReselectionPriority given for these NSAG(s).
  • Frequencies that support a NSAG provided by NAS and that indicate nsag-CellReselectionPriority for the NSAG have higher re-selection priority than frequencies that support the prioritized NSAG without indicating nsag-CellReselectionPriority for the NSAG.
  • Frequencies that support none of the NSAG(s) provided by NAS are prioritized in the order of their cellReselectionPriority.
  • the slice specific cell reselection priority may be re-derived when the best cell doesn't support highest priority frequency.
  • the UE For the UE performing slice-based cell reselection if the cell fulfils the above criteria for the cell reselection based on re-selection priority for the frequency and the slice group derived according to above rules, but the cell does not support the slice group based on above conditions, the UE re-derives a re-selection priority for the frequency by considering the slice group(s) supported by the cell (rather than those of the corresponding NR frequency) according to clause above rules. The reselection priority is used until the highest ranked cell changes on the frequency, or new slice or slice group priorities are received from NAS. The UE ensures the cell reselection criteria above are fulfilled based on the newly derived priorities.
  • the UE receives RRCRelease with deprioritisationReq
  • the UE considers current frequency and stored frequencies due to the previously received RRCRelease with deprioritisationReq or all the frequencies of NR to be the lowest priority frequency (i.e. lower than any of the network configured values) while T325 is running irrespective of camped RAT.
  • the UE deletes the stored deprioritisation request(s) when a PLMN selection or SNPN selection is performed on request by NAS.
  • circuits may, for example, be embodied in one or more semiconductor chips, or on substrate supports such as printed circuit boards and the like.
  • circuits constituting a block may be implemented by dedicated hardware, or by a processor (e.g., one or more programmed microprocessors and associated circuitry), or by a combination of dedicated hardware to perform some functions of the block and a processor to perform other functions of the block.
  • a processor e.g., one or more programmed microprocessors and associated circuitry
  • Each block of the embodiments may be physically separated into two or more interacting and discrete blocks without departing from the scope of the disclosure.
  • the blocks of the embodiments may be physically combined into more complex blocks without departing from the scope of the disclosure.
  • the embodiments herein provide a method for handling slice based cell reselection priorities.
  • the method includes receiving, by a UE, a RRC message including a slice information for a NSAG at a frequency and without any priority information. Further, the method includes receiving, by the UE, a RRC message including a slice information for a NSAG including priority information for a NSAG at another frequency. Further, the method includes determining, by the UE, whether the RRC message includes the slice information with the priority information or the slice information without the priority information. Further, the method includes determining, by the UE, a lowest priority value for the frequency when the RRC message includes the slice information without the priority information, where the lowest priority value is lower than any of the priority information configured for the frequency.
  • This lowest priority value is applied for the frequency during the slice based cell reselection priority calculation with respect to the corresponding NSAG. Further, the method includes performing, by the UE, cell reselection based on the lowest priority value for the frequency and the slice information.
  • FIGS. 1 through 6 there are shown preferred embodiments.
  • FIG. 1 illustrates a wireless network (1000) for handling slice based cell reselection priorities, according to the embodiments as disclosed herein.
  • the wireless network (1000) can be, for example, but not limited to a fourth generation (4G) network, a fifth generation (5G) network, an Open Radio Access Network (ORAN) or the like.
  • the wireless network (1000) includes a UE (100) and a network apparatus (200).
  • the UE (100) can be, for example, but not limited to a laptop, a smart phone, a desktop computer, a notebook, a Device-to-Device (D2D) device, a vehicle to everything (V2X) device, a foldable phone, a smart TV, a tablet, an immersive device, and an internet of things (IoT) device.
  • the network apparatus (200) can be, for example, but not limited to a gNB, a eNB, a new radio (NR) trans-receiver or the like.
  • the UE (100) receives a RRC message, from the network apparatus (200), comprising a slice information for a NSAG at a frequency and without any priority information.
  • the priority information includes at least one of a nsag-CellReselectionPriority, a nsag-CellReselectionSubPriority,CellReselectionPriority and CellReselectionSubPriority.
  • the RRC message can be, for example, but not limited to a RRCRelease or the SIB.
  • the SIB is one of a SIB2 and a SIB4.
  • the UE (100) receives the RRC message comprising the slice information for the NSAG comprising priority information for the NSAG at another frequency. Further, the UE (100) determines whether the RRC message comprises the slice information with the priority information or the slice information without the priority information. Further, the UE (100) determines a lowest priority value for the frequency when the RRC message comprises the slice information without the priority information. The lowest priority value is lower than any of the priority information configured for the frequency. Further, the UE (100) performs cell reselection based on the lowest priority value for the frequency and the slice information.
  • the UE (100) ignores the priority information received in a SIB. Further, the UE (100) performs the slice based cell reselection using only the NSAG-Frequency pairs without priority information received in a RRC Release when the RRCRelease comprises the slice information including NSAG-Frequency pairs without including the priority information for all the NSAG-Frequency pairs. In other words, the UE (100) derives the cell reselection priorities using the NSAG-Frequency pair, applying the rules for deriving the slice based cell reselection priorities and performs the cell reselection. This is unlike the traditional systems, where the UE (100) doesn't perform cell reselection if the cell reselection priorities are not provided.
  • the UE (100) receives the slice information for a first frequency (F1) and a second frequency (F2), where the slice information for the F1 doesn't include the priority information and the slice information for the F2 includes the priority information set as zero. Further, the UE (100) determines the F2 is higher priority than the F1 when the F1 doesn't include the priority information and the F2 includes the priority information set as zero.
  • freqPriorityListDedicatedSlicing i.e. list of dedicated slice information
  • SliceInfoListDedicated i.e., dedicated slice information
  • all the SliceInfoDedicated contains only nsag-IdentityInfo (i.e.
  • NSAG identity of NSAG
  • UE ignores the cell reselection priority and cell reselection sub-priority received in inter-frequency carrier information (i.e., InterFreqCarrierFreqInfo) and cellReselectionServingFreqInfo within the system information (for e.g. NR SIB4 and NR SIB2).
  • InterFreqCarrierFreqInfo inter-frequency carrier information
  • cellReselectionServingFreqInfo within the system information (for e.g. NR SIB4 and NR SIB2).
  • the UE (100) has received slice information lists through dedicated signalling (in a NR RRCRelease) where the slice information (in a NR SliceInfoDedicated) in all the received slice information lists (in NR SliceInfoListDedicated) for all the frequencies provided in RRCRelease, doesn't include any priority (i.e.
  • nsag-CellReselectionPriority and nsag-CellReselectionSubPriority doesn't include nsag-CellReselectionPriority and nsag-CellReselectionSubPriority ) and has not received any NR or E-UTRA frequencies associated to non-slice specific priorities (i.e., has not received freqPriorityListNR or freqPriorityListEUTRA including cellReselectionPriority or cellReselectionSubPriority in NR) in RRCRelease. Further, the UE (100) ignores any of the received non slice specific cell reselection priorities and subpriorities in the system information.
  • the UE (100) ignores cellReselectionPriority or cellReselectionSubPriority in InterFreqCarrierFreqInfo received in NR SIB4 and cellReselectionPriority or cellReselectionSubPriority in cellReselectionServingFreqInfo in NR SIB2 and performs cell reselection prioritisation without using the above ignored information.
  • the UE (100) may also ignore any NSAG specific cell reselection priorities received in the system information (i.e. ignore nsag-CellReselectionPriority and nsag-CellReselectionSubPriority in SIB16).
  • the UE (100) ignores the cell reselection priority in the system information based on the presence of NSAG, and the frequency pair even when there is no cell reselection priority.
  • the UE (100) ignores cellReselectionPriority or cellReselectionSubPriority received in the SIB2 and the SIB4.
  • the UE (100) ignores the nsag-CellReselectionPriority and nsag-CellReselectionSubPriority in the SIB16.
  • the UE (100) When the UE (100) receives the RRCRelease with cellReselectionPriorities, the UE (100) ignores all the priorities provided in system information.
  • the cellReselectionPriorities can include FreqPriorityListDedicatedSlicing (list of dedicated slice information's, each slice information including the NSAG-Frequency information and optionally the corresponding priorities), freqPriorityListNR or freqPriorityListEUTRA.
  • the UE (100) When the UE (100) receives any of the parameters in the RRCRelease, the UE (100) ignores all the priorities provided in the system information, such as for NR, all the priorities provided in freqPriorityListNRSlicing in the SIB16 or IntraFreqCellReselectionInfo in the SIB2 or InterFreqCarrierFreqList in the SIB4. For example, if the FreqPriorityListDedicatedSlicing is configured, the UE (100) doesn't consider any of the priorities from the list freqPriorityListNRSlicing in the system information.
  • the UE (100) ignores the NSAG-frequency pairs present in FreqPriorityListNRSlicing which are not present in FreqPriorityListDedicatedSlicing. This means that with this embodiment, the UE (100) considers only the NSAG-Frequency pairs in FreqPriorityListDedicatedSlicing for deriving priorities for the slice based cell reselection. In another embodiment, when the UE (100) receives the RRCRelease including cellReselectionPriority or cellReselectionSubPriority, the UE (100) ignores any slice Information received in SIB16.
  • the UE (100) when the UE (100) receives slice information (either sliceInfo in SIB16 or sliceInfoDedicated in the RRCRelease) from the network apparatus (200) for two frequencies F1 and F2 for the NSAG, the NSAG1 and the sliceInfo for the F1 doesn't contain NSAG cell reselection priority (i.e., doesn't contain nsag-CellReselectionPriority and nsag-CellReselectionSubPriority) for the NSAG1 while sliceInfo for F2 contain NSAG cell reselection priority as zero, (nsag-CellReselectionPriority is set as zero and nsag-CellReselectionSubPriority is not present), the UE (100) considers F1 and F2 are equal priorities for the slice based cell reselection.
  • the UE (100) when the UE (100) receives slice information (either sliceInfo from the SIB or sliceInfoDedicated in RRCRelease) from the network apparatus (200) for two frequencies F1 and F2 for the NSAG, the NSAG1 and the sliceInfo for the F1 doesn't contain NSAG cell reselection priority (i.e.
  • nsag-CellReselectionPriority and nsag-CellReselectionSubPriority for NSAG1 while the sliceInfo for F2 contains the NSAG cell reselection priority as zero, (nsag-CellReselectionPriority is set as zero and nsag-CellReselectionSubPriority is not present), the UE (100) considers F2 as higher priority than the F1 for slice based cell reselection.
  • F1 there are two frequencies i.e. F1: supports NSAG1 but network apparatus (200) is not indicating any nsag-CellReselectionPriority in the sliceInfo for NSAG1.
  • the F2 supports NSAG1 but network apparatus (200) is indicating nsag-CellReselectionPriority to 0 for NSAG1.
  • the F2 and F1 have equal slice based cell reselection priority whereas the NSAG1 is the highest prioritised NSAG based on NAS based priorities.
  • the UE (100) when the UE (100) receives slice information (either sliceInfo from the SIB or sliceInfoDedicated in the RRCRelease) from the network apparatus (200) for two frequencies F1 and F2 for the NSAG, the NSAG1 and the sliceInfo for the F1 doesn't contain NSAG cell reselection priority (i.e.
  • nsag-CellReselectionPriority and nsag-CellReselectionSubPriority for the NSAG1 while sliceInfo for the F2 contain NSAG cell reselection priority as zero, (nsag-CellReselectionPriority is set as zero and nsag-CellReselectionSubPriority is not present), the UE (100) considers the F2 as higher priority than F1 for slice based cell reselection.
  • F1 supports NSAG1 but the network apparatus (200) is not indicating any nsag-CellReselectionPriority in the sliceInfo for NSAG1 and the F2 supports NSAG1 but the network apparatus (200) is indicating nsag-CellReselectionPriority to 0 for NSAG1.
  • the F2 has higher slice based cell reselection priority than F1 whereas NSAG1 is the highest prioritised NSAG based on NAS based priorities.
  • the F1 without including nsag-CellReselectionPriority and nsag-CellReselectionSubPriority is considered as the lowest priority among the F1 and the F2.
  • Such an operation provides the network apparatus (200) more flexibility for signaling. Since the lowest configurable value for slice-specific cell reselection priority is '0', the network apparatus (200) can use an additional procedures for configuration and thereby provide a priority which is even lower than '0', with less signalling overhead. This increases the options for prioritizing the frequencies without increasing the signalling overhead.
  • the UE (100) when the UE (100) receives slice information (either sliceInfo from the SIB or sliceInfoDedicated in RRCRelease) from the network apparatus (200) for two frequencies F1 and F2 for the NSAG, the NSAG1 and the sliceInfo for the F1 doesn't contain NSAG cell reselection priority (i.e.
  • nsag-CellReselectionPriority and nsag-CellReselectionSubPriority for NSAG1 while sliceInfo for F2 contain NSAG cell reselection priority as zero, (nsag-CellReselectionPriority is set as zero and nsag-CellReselectionSubPriority is not present), we propose that the UE (100) consider F1 as higher priority than F2 for slice based cell reselection.
  • FIG. 2A shows various hardware components of the UE (100), according to the embodiments as disclosed herein.
  • the UE (100) includes a processor (110), a communicator (120), a memory (130) and a slice based cell reselection controller (140).
  • the processor (110) is coupled with the communicator (120), the memory (130) and the slice based cell reselection controller (140).
  • the slice based cell reselection controller (140) receives the RRC message comprising the slice information for the NSAG at the frequency and without any priority information.
  • the priority information includes the nsag-CellReselectionPriority, the nsag-CellReselectionSubPriority, the CellReselectionPriority and the CellReselectionSubPriority.
  • the RRC message can be, for example, but not limited to the RRCRelease or the SIB.
  • the SIB is one of a SIB2 and a SIB4.
  • the slice based cell reselection controller (140) receives the RRC message comprising the slice information for the NSAG comprising priority information for the NSAG at another frequency. Further, the slice based cell reselection controller (140) determines whether the RRC message comprises the slice information with the priority information or the slice information without the priority information. Further, the slice based cell reselection controller (140) determines the lowest priority value for the frequency when the RRC message includes the slice information without the priority information. The lowest priority value is lower than any of the priority information configured for the frequency. Further, the slice based cell reselection controller (140) performs cell reselection based on the lowest priority value for the frequency and the slice information.
  • the slice based cell reselection controller (140) configures to ignore the priority information received in at least one system information block (SIB). Further, the slice based cell reselection controller (140) performs the slice based cell reselection using only the NSAG-Frequency pairs without priority information received in a RRC Release when the RRCRelease comprises the slice information including NSAG-Frequency pairs without including the priority information for all the NSAG-Frequency pairs and the RRC Release does not comprises the NR frequencies or the E-UTRA frequencies associated to non-slice specific priorities.
  • SIB system information block
  • the slice based cell reselection controller (140) performs the slice based cell reselection by considering only the NSAG-frequency pairs indicated in the FreqPriorityListDedicatedSlicing.
  • the slice based cell reselection controller (140) receives the slice information for a first frequency (F1) and a second frequency (F2), where the slice information for the F1 doesn't include the priority information and the slice information for the F2 includes the priority information set as zero. Further, the slice based cell reselection controller (140) determines the F2 is higher priority than the F1 when the F1 doesn't include the priority information and the F2 includes the priority information set as zero.
  • the slice based cell reselection controller (140) is implemented by analog and/or digital circuits such as logic gates, integrated circuits, microprocessors, microcontrollers, memory circuits, passive electronic components, active electronic components, optical components, hardwired circuits and the like, and may optionally be driven by firmware.
  • the processor (110) is configured to execute instructions stored in the memory (130) and to perform various processes.
  • the processor (110) is a general-purpose processor, such as a Central Processing Unit (CPU), an application processor, or the like, a graphics-only processing unit such as a Graphics Processing Unit (GPU), a Visual Processing Unit (VPU) and the like.
  • the processor (110) includes multiple cores to execute the instructions.
  • the communicator (120) is configured for communicating internally between internal hardware components and with external devices via one or more networks.
  • the communicator (120) is configured for communicating internally between hardware components in the UE (100).
  • the memory (130) also stores instructions to be executed by the processor (110).
  • the memory (130) may include non-volatile storage elements.
  • non-volatile storage elements may include magnetic hard discs, optical discs, floppy discs, flash memories, or forms of electrically programmable memories (EPROM) or electrically erasable and programmable (EEPROM) memories.
  • the memory (130) may, in some examples, be considered a non-transitory storage medium.
  • the term “non-transitory” may indicate that the storage medium is not embodied in a carrier wave or a propagated signal. However, the term “non-transitory” should not be interpreted that the memory (130) is non-movable.
  • a non-transitory storage medium may store data that can, over time, change (e.g., in Random Access Memory (RAM) or cache).
  • RAM Random Access Memory
  • FIG. 2A shows various hardware components of the UE (100) but it is to be understood that other embodiments are not limited thereon. In other embodiments, the UE (100) may include less or more number of components. Further, the labels or names of the components are used only for illustrative purpose and does not limit the scope of the invention. One or more components can be combined together to perform same or substantially similar function in the UE (100).
  • FIG. 2B illustrates a network apparatus according to embodiments of the present disclosure.
  • the network apparatus 200 may include a processor 210, a transceiver 220 and a memory 230. However, all of the illustrated components are not essential. The network apparatus 200 may be implemented by more or less components than those illustrated in FIG. 2B. In addition, the processor 210 and the transceiver 220 and the memory 230 may be implemented as a single chip according to another embodiment.
  • the network apparatus 200 may correspond to the gNB described above.
  • the network apparatus 200 may correspond to network apparatus 200 illustrated in FIG. 1.
  • the processor 210 may include one or more processors or other processing devices that control the proposed function, process, and/or method. Operation of the network apparatus 200 may be implemented by the processor 210.
  • the transceiver 220 may include a RF transmitter for up-converting and amplifying a transmitted signal, and a RF receiver for down-converting a frequency of a received signal.
  • the transceiver 220 may be implemented by more or less components than those illustrated in components.
  • the transceiver 220 may be connected to the processor 210 and transmit and/or receive a signal.
  • the signal may include control information and data.
  • the transceiver 220 may receive the signal through a wireless channel and output the signal to the processor 210.
  • the transceiver 220 may transmit a signal output from the processor 210 through the wireless channel.
  • the memory 230 may store the control information or the data included in a signal obtained by the network apparatus 200.
  • the memory 230 may be connected to the processor 210 and store at least one instruction or a protocol or a parameter for the proposed function, process, and/or method.
  • the memory 230 may include read-only memory (ROM) and/or random access memory (RAM) and/or hard disk and/or CD-ROM and/or DVD and/or other storage devices.
  • FIG. 3 is a flow chart (S300) illustrating a method for handling slice based cell reselection priorities, according to the embodiments as disclosed herein.
  • the operations (S302-S310) are handled by the slice based cell reselection controller (140).
  • the method includes receiving the RRC message including the slice information for the NSAG at the frequency and without any priority information.
  • the method includes receiving the RRC message including the slice information for the NSAG including priority information for the NSAG at another frequency.
  • the method includes determining whether the RRC message includes the slice information with the priority information or the slice information without the priority information.
  • the method includes determining the lowest priority value for the frequency when the RRC message includes the slice information without the priority information. The lowest priority value is lower than any of the priority information configured for the frequency.
  • the method includes performing cell reselection based on the lowest priority value for the frequency and the slice information.
  • FIG. 4 is a flow chart (S400) illustrating a method for handling of the RRC release with the slice information without any priority, according to the embodiments as disclosed herein.
  • the operations (S402-S406) are handled by the slice based cell reselection controller (140).
  • the method includes receiving the slice information in the RRC Release without including any priority such as nsag-CellReselectionPriority and nsag-CellReselectionSubPriority.
  • the method includes ignoring the cellReselectionPriority or cellReselectionSubPriority received in the SIB2 and the SIB4 and ignoring the nsag-CellReselectionPriority and nsag-CellReselectionSubPriority in the SIB16.
  • the method includes performing the slice based cell reselection using the NSAG, Frequency pairs without priority information received in the RRC Release.
  • FIG. 5 is a flow chart (S500) illustrating a method for handling slice based prioritisation between the NSAG cell reselection priority absent and NSAG cell reselection priority is zero, according to the embodiments as disclosed herein.
  • the operations (S502-S504) are handled by the slice based cell reselection controller (140).
  • the method includes receiving the slice information for the F1 and the F2 for same NSAG.
  • the sliceInfo for F1 doesn't contain NSAG cell reselection priority and the sliceInfo for F2 contains NSAG cell reselection priority set as zero.
  • the method includes determines that F1 and F2 are equal priority for the slice based cell reselection.
  • FIG. 6 is a flow chart (S600) illustrating a method for handling slice based cell reselection using derived priorities, according to the embodiments as disclosed herein.
  • the operations (S602-S608) are handled by the slice based cell reselection controller (140).
  • the method includes receiving the slice information in the RRC release including the set of NSAG, Frequency pairs.
  • the method includes receiving the slice information in the system information including the set of NSAG, the frequency pair including some NSAG, the frequency pairs not present in the RRC release.
  • the method includes deriving the cell reselection priorities for the slice based reselection using only the set of NSAG and the frequency pairs in the RRC Release.
  • the method includes performing the slice based cell reselection using the derived priorities.

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système de communication 5G ou 6G destiné à prendre en charge un plus haut débit de transmission de données. Selon des modes de réalisation, la présente invention concerne un procédé de gestion de priorités de resélection de cellule basée sur la tranche par un UE (100). Le procédé comprend la réception d'un message RRC comprenant des informations de tranche pour un NSAG à une fréquence et sans aucune information de priorité. En outre, le procédé comprend la réception d'un message RRC comprenant des informations de tranche pour un NSAG et comprenant des informations de priorité pour un NSAG à une autre fréquence. En outre, le procédé comprend la détermination de si le message RRC comprend les informations de tranche avec les informations de priorité ou les informations de tranche sans les informations de priorité. En outre, le procédé comprend la détermination d'une valeur de priorité la plus basse pour la fréquence lorsque le message RRC comprend les informations de tranche sans les informations de priorité. La valeur de priorité la plus basse est plus basse que n'importe laquelle des informations de priorité configurées pour la fréquence. En outre, le procédé comprend la réalisation d'une resélection de cellule sur la base de la valeur de priorité la plus basse pour la fréquence et des informations de tranche.
PCT/KR2023/011757 2022-08-09 2023-08-09 Procédé et appareil de gestion de priorités de resélection de cellule basée sur la tranche WO2024035117A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021094975A1 (fr) * 2019-11-13 2021-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Resélection de cellule basée sur un groupe d'équipements d'utilisateur
WO2021234672A1 (fr) * 2020-05-21 2021-11-25 Lenovo (Singapore) Pte. Ltd. Maintien en parallèle d'une couche de fréquence pendant une resélection de cellule
WO2022059768A1 (fr) * 2020-09-18 2022-03-24 Sharp Kabushiki Kaisha Procédé et appareil pour déterminer un support pour une tranche de réseau dans une bande radio de desserte en cours
EP4017120A1 (fr) * 2019-11-14 2022-06-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé et appareil de contrôle d'accès, et dispositif terminal

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Publication number Priority date Publication date Assignee Title
WO2021094975A1 (fr) * 2019-11-13 2021-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Resélection de cellule basée sur un groupe d'équipements d'utilisateur
EP4017120A1 (fr) * 2019-11-14 2022-06-22 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé et appareil de contrôle d'accès, et dispositif terminal
WO2021234672A1 (fr) * 2020-05-21 2021-11-25 Lenovo (Singapore) Pte. Ltd. Maintien en parallèle d'une couche de fréquence pendant une resélection de cellule
WO2022059768A1 (fr) * 2020-09-18 2022-03-24 Sharp Kabushiki Kaisha Procédé et appareil pour déterminer un support pour une tranche de réseau dans une bande radio de desserte en cours

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