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JP-7856145-B2 - Wireless access network nodes, core network nodes, wireless terminals, and methods thereof

JP7856145B2JP 7856145 B2JP7856145 B2JP 7856145B2JP-7856145-B2

Inventors

  • 田村 豊武
  • 中田 昌志

Assignees

  • 日本電気株式会社

Dates

Publication Date
20260511
Application Date
20230525
Priority Date
20220602

Claims (10)

  1. The wireless terminal includes means for receiving a first control message from a core network that includes a first information element indicating at least the remaining amount of data available for use over a predetermined period . Wireless access network node.
  2. The system further comprises means for determining, based on the first information element, whether to perform carrier aggregation and/or dual connectivity for the wireless terminal. A wireless access network node according to claim 1.
  3. The system further comprises means for determining, based on the first information element, whether or not to suspend the use of some or all of the secondary cells of one or more carrier aggregations running for the wireless terminal. A wireless access network node according to claim 1.
  4. The system further comprises means for determining, based on the first information element, whether to discontinue the use of some or all of the secondary cell groups of the dual connectivity running for the wireless terminal, A wireless access network node according to claim 1.
  5. The system further comprises means for transmitting a second control message, which includes a second information element derived based on the first information element, to a secondary node of dual connectivity for the wireless terminal. A wireless access network node according to claim 1.
  6. If the remaining amount of the aforementioned data falls below a first threshold, means for recognizing that dual connectivity is not required for the wireless terminal, A wireless access network node according to claim 1, comprising means for recognizing that neither dual connectivity nor carrier aggregation is required for the wireless terminal if the remaining amount of data falls below a second threshold which is smaller than the first threshold.
  7. The wireless terminal receives a first control message from the core network that includes a first information element indicating at least the remaining amount of data available for use over a predetermined period . A method performed by a wireless access network node.
  8. A program that causes a computer to perform a method for a wireless access network node, The method comprises receiving a first control message from a core network that includes at least a first information element indicating the remaining amount of data available to the wireless terminal for a predetermined period . program .
  9. The wireless terminal includes means for transmitting a first control message to a wireless access network node, which includes a first information element indicating at least the remaining amount of data available for use over a predetermined period. Core network node.
  10. The system includes means for transmitting a control message to the core network that contains informational elements indicating whether carrier aggregation and/or dual connectivity are required. Wireless terminal.

Description

This disclosure relates to wireless communication systems, and more particularly to connection management or mobility management of wireless terminals. In a fifth-generation mobile communication system (5G system), a Radio Access Network (RAN) can receive per Session Aggregate Maximum Bit Rate (Session-AMBR), per User Equipment (UE) Aggregate Maximum Bit Rate (UE-AMBR), and per UE per Slice-Maximum Bit Rate (UE-Slice-MBR) from the core network (see, for example, Non-Patent Documents 1 and 2). Each of Session-AMBR, UE-AMBR, and UE-Slice-MBR includes values for uplink (UL) and downlink (DL). Session-AMBR limits the aggregate bitrate expected to be delivered across all non-Guaranteed Bit Rate (non-GBR) Quality of Service (QoS) flows for a specific Protocol Data Unit (PDU) Session. The RAN uses Session-AMBR to calculate its UE-AMBR. UE-AMBR limits the aggregated bitrate expected to be provided across all Non-GBR QoS Flows of a Wireless Terminal (UE). The RAN enforces UE-AMBR for each UE at UL and DL for Non-GBR QoS Flows. The RAN sets its UE-AMBR to the sum of the Session-AMBRs of all PDU Sessions with active user planes for that RAN, up to the UE-AMBR received from the core network. The UE-Slice-MBR limits the aggregated bitrate expected to be provided across all GBR and non-GBR QoS flows corresponding to PDU sessions of a UE with an active user plane within the same network slice (Single Network Slice Selection Assistance Information (S-NSSAI)). If a supporting RAN receives the UE-Slice-MBR for the S-NSSAI from the core network for a UE, the RAN applies this UE-Slice-MBR to all PDU sessions of that UE with an active user plane corresponding to that S-NSSAI, if feasible. The master node (MN) of a dual connectivity (DC) can determine the Session-AMBR limit, UE-AMBR limit, and UE-Slice-MBR limit to be allocated to the secondary node (SN) of the DC, and send these to the SN (see, for example, Non-Patent Documents 3 and 4). 3GPP TS 23.501 V17.4.0 (2022-03) "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; System architecture for the 5G System (5GS); Stage 2 (Release 17)", March 20223GPP TS 38.413 V17.0.0 (2022-04) "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NG-RAN; NG Application Protocol (NGAP) (Release 17)", April 20223GPP TS 37.340 V17.0.0 (2022-03) "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Stage 2 (Release 17)", March 20223GPP TS 38.423 V17.0.0 (2022-04) "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NG-RAN; Xn application protocol (XnAP) (Release 17)", April 2022 This figure shows an example configuration of a wireless communication system according to the embodiment.This is a sequence diagram showing an example of signaling according to the embodiment.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This is a sequence diagram showing an example of signaling according to the embodiment.This flowchart shows an example of the operation of a core network node according to the embodiment.This flowchart shows an example of the operation of a RAN node according to the present invention.This is a sequence diagram showing an example of the operation of a RAN node and a core network node according to the embodiment.This is a sequence diagram showing an example of the operation of two RAN nodes according to the embodiment.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation of a RAN node according to the present invention.This flowchart shows an example of the operation