WO2023286420A1 - 無線アクセスネットワークノード及びその方法 - Google Patents
無線アクセスネットワークノード及びその方法 Download PDFInfo
- Publication number
- WO2023286420A1 WO2023286420A1 PCT/JP2022/019162 JP2022019162W WO2023286420A1 WO 2023286420 A1 WO2023286420 A1 WO 2023286420A1 JP 2022019162 W JP2022019162 W JP 2022019162W WO 2023286420 A1 WO2023286420 A1 WO 2023286420A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- message
- node
- inter
- cpc
- information items
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 68
- 230000008859 change Effects 0.000 claims abstract description 123
- 230000004044 response Effects 0.000 claims abstract description 50
- 230000011664 signaling Effects 0.000 claims abstract description 45
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 230000009977 dual effect Effects 0.000 claims description 53
- 238000012986 modification Methods 0.000 claims description 12
- 230000004048 modification Effects 0.000 claims description 12
- 238000012545 processing Methods 0.000 description 38
- 238000004891 communication Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 239000013256 coordination polymer Substances 0.000 description 7
- 230000000977 initiatory effect Effects 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 4
- 238000013468 resource allocation Methods 0.000 description 4
- 230000001934 delay Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000013144 data compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
- H04W36/362—Conditional handover
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/20—Interfaces between hierarchically similar devices between access points
Definitions
- the present disclosure relates to wireless communication systems, and more particularly to wireless terminal mobility in multi-connectivity (e.g. Dual Connectivity).
- multi-connectivity e.g. Dual Connectivity
- the 3rd Generation Partnership Project (3GPP (registered trademark)) is considering Release 17.
- 3GPP supports cell change (i.e. inter- Applying conditional mobility to SN PSCell change is discussed (see, for example, Non-Patent Documents 1-7). This is called inter-SN conditional PSCell Change (CPC).
- the PSCell is a DC SCG Special Cell (SpCell).
- SpCell DC SCG Special Cell
- a UE randomly accesses a PSCell when performing a handover procedure (or a Reconfiguration with Sync procedure).
- An SCG is a group of serving cells associated with an SN, including a SpCell (i.e. PSCell) and optionally one or more Secondary Cells (SCells).
- CPC is a PSCell change procedure that is executed only when one or more execution conditions are met or satisfied.
- the wireless terminal i.e. User Equipment (UE)
- UE User Equipment
- S-SN Source SN
- MN Master Node
- T-SN target SN
- the CPC does not respond to the normal PSCell change.
- Inter-SN CPC can be initiated by MN or Source SN.
- An inter-SN CPC initiated by a MN is called an MN initiated inter-SN CPC.
- inter-SN CPC initiated by S-SN is called SN initiated inter-SN CPC.
- MN initiated inter-SN CPC MN generates CPC execution conditions and T-SN generates PSCell configuration (or SCG configuration).
- S-SN generates CPC execution conditions and sends them to MN.
- the T-SN generates the SCG configuration and sends it to the MN.
- the MN then sends the CPC configuration (e.g. Conditional Reconfiguration Information Element (IE)) containing the CPC execution conditions and SCG settings to the UE via the Radio Resource Control (RRC) (Connection) Reconfiguration message.
- IE Conditional Reconfiguration Information Element
- MN has CPC settings (e.g. Conditional Reconfiguration IE) containing PSCell settings (or SCG settings) received from S-SN and CPC execution conditions received from S-SN and send it to the UE via the RRC (Connection) Reconfiguration message.
- CPC settings e.g. Conditional Reconfiguration IE
- the MN can receive the CPC execution conditions for each of multiple candidate PSCells from the S-SN in an SN Change Required message, and then perform PSCell configuration for each of all or a subset of these multiple candidate PSCells.
- the MN may be received from the T-SN in the SN Addition Request Acknowledge message. However, if the T-SN rejects some of the candidate PSCells indicated by the S-SN, the MN may send an updated 1 or more for only a subset of the candidate PSCells accepted by the T-SN. Additional signaling with the S-SN may be required to receive these CPC execution conditions. Additionally, in some implementations, the MN may not know whether one or more PSCell configurations received from the T-SN correspond to all candidate PSCells specified by the S-SN. Absent. In this case, the MN to receive updated one or more CPC execution conditions regardless of whether T-SN has rejected some of the candidate PSCells indicated by S-SN. , may need to do additional signaling with the S-SN. Such additional signaling may increase delays in CPC preparation.
- One of the objects to be achieved by the embodiments disclosed in this specification is to provide an apparatus, method, and program that contribute to solving at least one of a plurality of problems including the problems described above. That is. It should be noted that this objective is only one of the objectives that the embodiments disclosed herein seek to achieve. Other objects or problems and novel features will become apparent from the description of the specification or the accompanying drawings.
- a first aspect is directed to a RAN node configured to operate as a MN associated with a Master Cell Group (MCG) in dual connectivity for a UE.
- the RAN node includes at least one memory and at least one processor coupled to the at least one memory.
- the at least one processor is configured to receive a first inter-node message from the S-SN indicating a request for SN-initiated inter-SN CPC.
- the first internode message includes one or more CPC execution condition information items indicating a plurality of CPC execution conditions each associated with a respective one of a plurality of candidate PSCells.
- the at least one processor sends a second inter-node message to T-SN indicating a request for an inter-SN CPC and containing information of the plurality of candidate PSCells, and a third inter-node message to the T-SN. Configured to receive from SN. Said third inter-node message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells. The third inter-node message indicates to the MN whether all of the plurality of candidate PSCells have been accepted. The at least one processor skips additional signaling with the S-SN or completes the additional signaling if the third inter-node message indicates that all of the plurality of candidate PSCells have been accepted.
- the at least one processor receives one or more updated CPC execution condition information items. perform the additional signaling with the S-SN to send a first MN RRC reconfiguration message containing the one or more updated CPC execution condition information items and the one or more PSCell configuration information items configured to transmit to said UE.
- a second aspect is directed to a method performed by a RAN node configured to act as a MN associated with an MCG in dual connectivity for a UE.
- the method includes the following steps: (a) receiving from the S-SN a first inter-node message indicating a request for an SN-initiated inter-SN CPC, wherein said first inter-node message is for each one of a plurality of candidate PSCells; contains one or more CPC execution condition information items that indicate multiple CPC execution conditions associated with the ; (b) sending a second inter-node message to the T-SN indicating a request for an inter-SN CPC and containing information of said plurality of candidate PSCells; (c) receiving a third internode message from said T-SN, wherein said third internode message each indicates a respective one PSCell configuration of one or more accepted candidate PSCells; containing one or more PSCell configuration information items, the third inter-node message indicates to the MN whether all of the
- a third aspect is directed to a RAN node configured to act as a T-SN associated with an SCG in dual connectivity for a UE.
- the RAN node includes at least one memory and at least one processor coupled to the at least one memory.
- the at least one processor receives from the MN a second inter-node message indicating a request for inter-SN CPC and containing information of a plurality of candidate PSCells, and transmits a third inter-node message to the MN. Configured.
- Said third inter-node message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells.
- the third inter-node message indicates to the MN whether all of the plurality of candidate PSCells have been accepted.
- a fourth aspect is directed to a method performed by a RAN node configured to act as a T-SN associated with an SCG in dual connectivity for a UE.
- the method comprises receiving from the MN a second inter-node message indicating an inter-SN CPC request and containing information of a plurality of candidate PSCells, and transmitting a third inter-node message to the MN.
- Said third inter-node message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells.
- the third inter-node message indicates to the MN whether all of the plurality of candidate PSCells have been accepted.
- a fifth aspect is directed to a RAN node configured to act as a MN associated with an MCG in dual connectivity for a UE.
- the RAN node includes at least one memory and at least one processor coupled to the at least one memory.
- the at least one processor is configured to receive a first inter-node message from the S-SN indicating a request for SN-initiated inter-SN CPC.
- the first node-to-node message includes a plurality of cell identity items each indicating a respective one of a plurality of candidate PSCells and a plurality of CPC executions each associated with a respective one of the plurality of cell identity items. and condition information items.
- the at least one processor sends a second inter-node message to the T-SN indicating a request for an inter-SN CPC and containing information of the plurality of candidate PSCells, and one or more accepted candidate PSCells. is adapted to receive from said T-SN a third inter-node message containing one or more PSCell configuration information items each indicating one PSCell configuration for each of said T-SNs.
- the at least one processor is configured to select one or more CPC execution information items corresponding to the one or more accepted candidate PSCells from the plurality of CPC execution condition information items.
- the at least one processor is configured to send a first MN RRC reconfiguration message including the one or more selected CPC execution information items and the one or more PSCell configuration information items to the UE. It is
- a sixth aspect is directed to a method performed by a RAN node configured to act as a MN associated with an MCG in dual connectivity for a UE.
- the method includes the following steps: (a) receiving from the S-SN a first inter-node message indicating a request for an SN-initiated inter-SN CPC, wherein said first inter-node message includes each one of a plurality of candidate PSCells; and a plurality of CPC execution condition information items each associated with a respective one of said plurality of cell identification information items; sending a second inter-node message to the target SN indicating a request for an inter-SN CPC and containing information of said plurality of candidate PSCells; receiving a third inter-node message from said target SN containing one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells; selecting one or more CPC execution information items corresponding to the one or more accepted candidate PSCells from the
- a seventh aspect is directed to a RAN node configured to act as an S-SN associated with an SCG in dual connectivity for a UE.
- the RAN node includes at least one memory and at least one processor coupled to the at least one memory.
- the at least one processor is configured to send a first inter-node message to the MN indicating a request for SN-initiated inter-SN CPC.
- the first node-to-node message includes a plurality of cell identity items each indicating a respective one of a plurality of candidate PSCells and a plurality of CPC executions each associated with a respective one of the plurality of cell identity items. and condition information items.
- An eighth aspect is directed to a method performed by a RAN node configured to act as a MN associated with an MCG in dual connectivity for a UE.
- the method includes sending to the MN a first inter-node message indicating a request for SN-initiated inter-SN CPC.
- the first node-to-node message includes a plurality of cell identity items each indicating a respective one of a plurality of candidate PSCells and a plurality of CPC executions each associated with a respective one of the plurality of cell identity items. and condition information items.
- a ninth aspect is directed to a RAN node configured to act as a MN associated with an MCG in dual connectivity for a UE.
- the RAN node includes at least one memory and at least one processor coupled to the at least one memory.
- the at least one processor transmits an MN RRC reconfiguration message including inter-SN CPC execution conditions and candidate PSCell configurations to the UE, and a first MN RRC reconfiguration in response to the MN RRC reconfiguration message.
- the at least one processor is configured to receive a complete message from the UE;
- the at least one processor is configured to receive a second MN RRC reconfiguration complete message transmitted from the UE in response to execution of the CPC or establishment of the execution condition.
- the at least one processor is configured to send a Conditional PSCell Change Notification message to the S-SN in response to receiving the second MN RRC reconfiguration complete message.
- a tenth aspect is directed to a method performed by a RAN node configured to act as a MN associated with an MCG in dual connectivity for a UE.
- the method includes the following steps: (a) sending an MN RRC reconfiguration message including inter-SN CPC execution conditions and candidate PSCell configurations to the UE; (b) receiving from the UE a first MN RRC reconfiguration complete message in response to the MN RRC reconfiguration message; (c) receiving a second MN RRC reconfiguration complete message transmitted from the UE in response to execution of the CPC or establishment of the execution condition; and (d) reception of the second MN RRC reconfiguration complete message.
- the eleventh aspect is directed to the program.
- the program includes instructions (software code) that, when read into a computer, cause the computer to perform the method according to the second, fourth, sixth, eighth, or tenth aspects above.
- FIG. 1 is a diagram illustrating a configuration example of a wireless communication network according to an embodiment
- FIG. FIG. 4 is a diagram illustrating a configuration example of a RAN node according to the embodiment
- 4 is a flow chart showing an example of processing performed by the MN according to the embodiment
- 4 is a flow chart showing an example of processing performed by a T-SN according to an embodiment
- FIG. 4 is a sequence diagram showing an example of processing performed by MN, S-SN, T-SN, and UE according to the embodiment
- FIG. 4 is a sequence diagram showing an example of processing performed by MN, S-SN, T-SN, and UE according to the embodiment; 4 is a flow chart showing an example of processing performed by the MN according to the embodiment; 4 is a flow chart showing an example of processing performed by an S-SN according to an embodiment; FIG. 4 is a sequence diagram showing an example of processing performed by MN, S-SN, T-SN, and UE according to the embodiment; It is a figure which shows an example of the format of the cell identification information item and execution condition information item which concern on embodiment. It is a figure which shows an example of the format of the cell identification information item and execution condition information item which concern on embodiment. 4 is a flow chart showing an example of processing performed by the MN according to the embodiment; FIG.
- FIG. 4 is a sequence diagram showing an example of processing performed by MN, S-SN, T-SN, and UE according to the embodiment;
- FIG. 4 is a sequence diagram showing an example of processing performed by MN, S-SN, T-SN, and UE according to the embodiment;
- 3 is a block diagram showing a configuration example of a RAN node according to the embodiment;
- FIG. 2 is a block diagram showing a configuration example of a UE according to an embodiment;
- LTE Long Term Evolution
- 5G system 5th generation mobile communication system
- LTE Long Term Evolution
- LTE-Advanced 5th generation mobile communication system
- ⁇ if'' is ⁇ when'', ⁇ at or around the time'', ⁇ after ( “after”, “upon”, “in response to determining", “in accordance with a determination", or “detecting may be interpreted to mean “in response to detecting”. These expressions may be interpreted to have the same meaning depending on the context.
- FIG. 1 shows a configuration example of a wireless communication network according to a plurality of embodiments including this embodiment.
- the wireless communication network includes RAN node 1, RAN node 2, RAN node 4 and UE3.
- Each element (network function) shown in FIG. 1 can be, for example, a network element on dedicated hardware, a software instance running on dedicated hardware, or an application platform. It can be implemented as an instantiated virtualization function.
- the RAN node 1 may be a Central Unit (e.g. eNB-CU or gNB-CU) in a cloud RAN (C-RAN) deployment, or a CU and one or more Distributed Units (e.g. eNB-DUs , or gNB-DUs). C-RAN is also called CU/DU split. Additionally, a CU may include a Control Plane (CP) Unit (e.g. gNB-CU-CP) and one or more User Plane (UP) Units (e.g. gNB-CU-UP). Therefore, RAN node 1 may be a CU-CP or a combination of CU-CP and CU-UP.
- CP Control Plane
- UP User Plane
- each of RAN nodes 2 and 4 may be a CU or a combination of a CU and one or more DUs.
- Each of RAN nodes 2 and 4 may be a CU-CP or a combination of CU-CP and CU-UP.
- Each of RAN nodes 1, 2, and 4 may be an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (EUTRAN) node or a Next generation Radio Access Network (NG-RAN) node.
- EUTRAN nodes may be eNBs or en-gNBs.
- NG-RAN nodes may be gNBs or ng-eNBs.
- An en-gNB is a node that provides NR user plane and control plane protocol termination to the UE and acts as a secondary node (SN) for E-UTRA-NR Dual Connectivity (EN-DC).
- ng-eNB is a node that provides E-UTRA user plane and control plane protocol termination to UE and is connected to 5GC via NG interface.
- the Radio Access Technology (RAT) of RAN node 1 may be different from that of RAN nodes 2 and 4.
- RAT Radio Access Technology
- RAN node 1 and RAN node 2 communicate with each other via inter-node interface (i.e. X2 interface or Xn interface) 103 .
- RAN node 1 and RAN node 2 operate as a dual connectivity master node (MN) and secondary node (SN), respectively.
- MN master node
- SN secondary node
- RAN node 1 and RAN node 4 communicate with each other via inter-node interface (i.e. X2 interface or Xn interface) 105 .
- RAN node 1 and RAN node 4 can act as DC MN and SN respectively.
- RAN nodes 1, 2 and 4 support inter-SN CPC from the SCG provided by RAN node 2 to the SCG provided by RAN node 4.
- RAN node 1 may be referred to as MN1
- RAN node 2 may be referred to as source SN (S-SN) 2
- RAN node 4 may be referred to as target SN (T-SN) 4.
- UE3 communicates with MN1 and S-SN2 via air interfaces 101 and 102 and performs dual connectivity of MCG provided by MN1 and SCG provided by S-SN2. Also, by performing inter-SN CPC, UE3 communicates with MN1 and T-SN4 via air interfaces 101 and 104, and has dual connectivity of MCG provided by MN1 and SCG provided by T-SN4. conduct.
- MN1 can be either a master eNB (in EN-DC), a master ng-eNB (in NGEN-DC), or a master gNB (in NR-DC and NE-DC).
- each of S-SN2 and T-SN4 is en-gNB (in EN-DC), secondary ng-eNB (in NE-DC), and secondary gNB (in NR-DC and NGEN-DC).
- EN-DC UE3 is connected to eNB acting as MN1 and to en-gNB acting as S-SN2 or T-SN4.
- NGEN-DC UE3 is connected to ng-eNB acting as MN1 and to gNB acting as S-SN2 or T-SN4.
- NE-DC is connected to gNB acting as MN1 and to ng-eNB acting as S-SN2 or T-SN4.
- UE3 is connected to one gNB (or gNB-DU) acting as MN1 and connected to another gNB (or gNB-DU) acting as S-SN2 or T-SN4. .
- MCG is a group of serving cells associated with (or served by) MN1, SpCell (i.e. Primary Cell (PCell)) and optionally one or more Secondary Cells (SCells)), while SCG is a group of serving cells associated with (or provided by) S-SN2 or T-SN4, including Primary SCG Cell (PSCell) and optionally Optionally contains one or more Secondary Cells (SCells).
- PSCells are Special Cells (SpCells) of SCG and support Physical Uplink Control Channel (PUCCH) transmission and contention-based Random Access Note that PSCell may be an abbreviation for Primary SCell in LTE (e.g. LTE-DC and NE-DC).
- the term “primary SCG cell” and its abbreviation “PSCell” are included in a group of cells served by a SN with dual connectivity, have uplink component carriers, and have uplink control channels (e.g. PUCCH) means the cell for which the resource is configured.
- the term “primary SCG cell” and its abbreviation “PSCell” are provided by SNs supporting 5G NR (e.g. en-gNB in EN-DC, gNB in NGEN-DC, or gNB in NR-DC).
- 5G NR e.g. en-gNB in EN-DC, gNB in NGEN-DC, or gNB in NR-DC
- MN1, S-SN2, and T-SN4 may have the configuration shown in FIG.
- Each element (network function) shown in FIG. 2 can be, for example, a network element on dedicated hardware, a software instance running on dedicated hardware, or a virtualized function instantiated on an application platform.
- One or more of MN1, S-SN2 and T-SN4 may include, but are not limited to, CU21 and one or more DUs 22 as shown in FIG.
- An interface 201 connects between the CU 21 and each DU 22 .
- UE 3 is connected to at least one DU 22 via at least one air interface 202 .
- CU21 may be a logical node that hosts the gNB's Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP), and Packet Data Convergence Protocol (PDCP) protocols (or gNB's RRC and PDCP protocols).
- DU 22 may be a logical node that hosts the gNB's Radio Link Control (RLC), Medium Access Control (MAC), and Physical (PHY) layers. If CU21 is a gNB-CU and DUs22 are gNB-DUs, interface 201 may be an F1 interface.
- CU21 may include CU-CP and CU-UP.
- FIG. 3 shows an example of operation of MN1 regarding SN-initiated inter-SN CPC.
- MN1 receives a first inter-node message from S-SN2 indicating a request for SN-initiated inter-SN CPC.
- the first inter-node message may be an SN Change Required message (e.g. SgNB Change Required or S-NODE Change Required).
- the first node-to-node message includes one or more CPC execution condition information items indicating a plurality of CPC execution conditions each associated with a respective one of the plurality of candidate PSCells.
- multiple CPC execution conditions may be included in one CPC execution condition information item.
- one CPC execution condition information item indicating multiple CPC execution conditions may be sent by the first inter-node message using a container transparent to MN1.
- one CPC execution condition information item indicating a plurality of CPC execution conditions may be an information item whose contents are not recognized or cannot be recognized by MN1.
- the container transparent to MN1 may be an RRC container sent from S-SN2 via MN1 to UE3.
- the first node-to-node message of step 301 may include an information item indicating candidate PSCells suggested by S-SN2.
- these one or more information items may be RRC level information items.
- one or more of these information items may be included in the candidateCellInfoListSN field within the inter-node RRC message (e.g. CG-Config).
- the candidateCellInfoListSN field indicates information indicating candidate PSCells.
- the candidateCellInfoListSN field may further indicate measurement results of one or more neighbor cells (candidate PSCells) measured by UE3. Additionally or alternatively, these one or more information items may be X2/Xn level information items.
- the first inter-node message e.g. SN Change Required
- MN1 sends a second inter-node message to T-SN4 indicating a request for inter-SN CPC and containing information of multiple candidate PSCells.
- the second inter-node message may be an SN Addition Request message (e.g. SgNB Addition Request or S-NODE Addition Request).
- MN1 receives a third internode message from T-SN4.
- the third inter-node message may be an SN Addition Request Acknowledge message (e.g. SgNB Addition Request Acknowledge or S-NODE Addition Request Acknowledge).
- the third inter-node message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells.
- Each PSCell configuration may be an SCG configuration.
- Each PSCell configuration information item may be an SN RRC Reconfiguration message containing PSCell configuration. In other words, each PSCell configuration information item may be an RRC container containing one corresponding PSCell configuration.
- the third inter-node message may contain a list of inter-node RRC messages for each of the candidate PSCells accepted by T-SN4 (e.g. a list of CG-Config).
- the third internode message of step 303 explicitly or implicitly indicates to MN1 whether all of the plurality of candidate PSCells indicated in the second internode message have been accepted.
- the third inter-node message explicitly or implicitly indicates to MN1 whether all of the multiple candidate PSCells indicated (or proposed) by MN1 or S-SN2 have been accepted.
- the third inter-node message may also include information at the X2/Xn level indicating the candidate PSCells accepted by T-SN4.
- T-SN 4 may explicitly or implicitly indicate in an inter-node RRC message (e.g. CG-Config) whether or not all of the multiple candidate PSCells have been accepted.
- T-SN4 includes information in the inter-node RRC message (e.g. CG-Config) that explicitly indicates that all of the multiple candidate PSCells have been accepted (or some of them have not been accepted).
- the inter-node RRC message e.g. CG-Config
- MN1 may recognize that T-SN4 has accepted all candidate PSCells by not including the list (that is, it may understand that all candidate PSCells have been accepted). Additionally or alternatively, the inter-node RRC message (e.g. CG-Config) may indicate a list of one or more candidate PSCell identifiers (PSCell IDs) accepted by T-SN4. In this case, S-SN2 transmits in advance a list of candidate PSCells proposed by S-SN2 in a form that MN1 can understand (recognizable) in the first inter-node message. MN1 may then compare the list received from S-SN2 with the list received from T-SN4 to determine whether all candidate PSCells have been accepted.
- the inter-node RRC message e.g. CG-Config
- the candidate PSCell identifier may be NR Cell Global Identifier (NR-CGI) or Evolved Universal Terrestrial Radio Access Network (E-UTRAN) CGI (ECGI).
- NR-CGI NR Cell Global Identifier
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- the list can indicate to MN1 whether all of the multiple candidate PSCells indicated by MN1 or S-SN2 have been accepted.
- T-SN4 determines whether all of the plurality of candidate PSCells indicated by MN1 or S-SN2 have been accepted by the Information Element (IE) included in the third inter-node message.
- IE Information Element
- a third node-to-node message e.g. SN Addition Request Acknowledge
- the third node-to-node message may contain a list of identifiers (PSCell IDs) of one or more candidate PSCells that have been rejected (i.e. not accepted) by T-SN4. MN1 may recognize that T-SN4 has accepted all candidate PSCells by not including the list (that is, it may understand that all candidate PSCells have been accepted). Additionally or alternatively, the third inter-node message may include a list of one or more candidate PSCells accepted by T-SN4 (e.g., Candidate PSCell ID List IE). The list may associate each accepted candidate PSCell identifier (PSCell ID) with one corresponding PSCell configuration (e.g.
- S-SN2 previously transmits in the first internode message a list of candidate PSCells proposed by S-SN2 at the X2/Xn level.
- MN1 may then compare the list received from S-SN2 with the list received from T-SN4 to determine whether all candidate PSCells have been accepted.
- the candidate PSCell identifier may be NR-CGI or ECGI.
- the list can indicate to MN1 whether all of the multiple candidate PSCells indicated by MN1 or S-SN2 have been accepted.
- MN1 checks whether all of the multiple candidate PSCells indicated (or proposed) by MN1 or S-SN2 are accepted by checking one or more PSCell IDs included in the list. can know whether or not
- MN1 detects that all of the multiple candidate PSCells have been accepted by T-SN4 by checking the third internode message. In this case, MN1 skips the additional signaling with S-SN2 or does not wait for the completion of the additional signaling, and sends one or more CPC execution condition information items (step 301) received from S-SN2. and one or more PSCell configuration information items (step 303) received from T-SN4 to UE3.
- the MN RRC reconfiguration message instructs UE3 to perform conditional reconfiguration for CPC.
- UE 3 Upon receiving the MN RRC reconfiguration message, UE 3 starts evaluation of CPC execution conditions. And UE3 starts the access to T-SN4 according to the CPC execution conditions of any candidate PSCell being satisfied.
- the MN RRC reconfiguration message in step 304 may include the ConditionalReconfiguration IE.
- the ConditionalReconfiguration IE may include the condReconfigToAddModList IE.
- the condReconfigToAddModList IE may associate the PSCell configuration (i.e. SN RRC Reconfiguration message) of each candidate PSCell with the corresponding CPC execution condition.
- This CPC execution condition may be specified by a measurement identity (measId).
- a measurement identifier associates a measurement object (MeasObject) with a report configuration (ReportConfig).
- MeasObject indicates information that applies to intra/inter-frequency measurements and indicates identifiers of one or more candidate PSCells.
- ReportConfig specifies criteria for triggering of CPC event.
- MN1 performs step 305 instead of step 304.
- MN1 performs additional signaling with S-SN to receive one or more updated CPC execution condition information items. For example, MN1 sends an inter-node message to S-SN2 indicating the identifiers of the candidate PSCells accepted by T-SN4, and S-SN2 responds (if necessary) with updated CPC execution condition information. Send an internode message indicating the item to MN1.
- the updated CPC execution condition information item may be the one in which the CPC execution conditions for the candidate PSCells not accepted by T-SN4 are deleted from the CPC execution condition information item that S-SN2 has already sent to MN1.
- S-SN2 may modify the CPC execution conditions for the candidate PSCells accepted by T-SN4 and send it to MN1 as an updated CPC execution condition information item.
- MN1 sends an MN RRC reconfiguration message including one or more CPC execution condition information items updated by S-SN2 and one or more PSCell configuration information items received from T-SN4 to UE3. Send.
- FIG. 4 shows an example of the operation of T-SN4.
- Step 401 corresponds to step 302 in FIG.
- T-SN4 receives a second inter-node message from MN1 indicating a request for inter-SN CPC and containing information of multiple candidate PSCells.
- step 402 corresponds to step 303 of FIG.
- T-SN4 sends a third internode message to MN1.
- the third inter-node message may be an SN Addition Request Acknowledge message (e.g. SgNB Addition Request Acknowledge or S-NODE Addition Request Acknowledge).
- the third inter-node message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells. Further, the third internode message explicitly or implicitly indicates to MN1 whether all of the multiple candidate PSCells indicated in the second internode message have been accepted.
- a specific example of the third node-to-node message is similar to that described with respect to step 303 of FIG.
- MN1 performs additional signaling with S-SN2 if all candidate PSCells proposed by MN1 or S-SN2 are accepted by T-SN4. or without waiting for the completion of the additional signaling, send a MN RRC reconfiguration message to UE3 to indicate the CPC. Therefore, this can prevent additional delays in CPC preparation due to additional signaling.
- FIG. 5 shows an example of operations of MN1, S-SN2, T-SN4, and UE3.
- the procedure shown in FIG. 5 is based on the operation of MN1 shown in steps 301-304 of FIG. 3 and the operation of T-SN4 shown in FIG.
- S-SN2 initiates the inter-SN CPC procedure by sending a SN Change Required message (e.g. SgNB Change Required or S-NODE Change Required) to MN1.
- S-SN2 indicates CPC initiation to MN1.
- the message contains the identifier of T-SN4.
- the message further includes one or more CPC execution condition information items indicating a plurality of CPC execution conditions each associated with a respective one of the plurality of candidate PSCells.
- MN1 may or may not be able to comprehend the CPC execution conditions set by S-SN2 (i.e. 1 or more CPC execution condition information items).
- CPC execution conditions may be contained in an RRC container transparent to MN1.
- one or more CPC execution condition information items may be RRC containers transparent to MN1.
- MN1 requests T-SN4 to allocate resources for UE3 using the SN Addition procedure. Specifically, MN1 sends an SN Addition Request message (e.g. SgNB Addition Request or S-NODE Addition Request) to T-SN4. This message indicates the CPC initiation to T-SN4 and indicates multiple candidate PSCells to T-SN4. In this message, MN1 may provide the upper limit (or maximum number) of candidate PSCells to T-SN4.
- SN Addition Request message e.g. SgNB Addition Request or S-NODE Addition Request
- T-SN4 responds to MN1 with an SN Addition Request Acknowledge message (e.g. SgNB Addition Request Acknowledge or S-NODE Addition Request Acknowledge).
- the message indicates that all of the multiple candidate PSCells proposed by MN1 or S-SN2 have been accepted (or prepared).
- the message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the accepted candidate PSCells.
- Each PSCell configuration may be an SCG configuration.
- Each PSCell configuration information item may be an SN RRC Reconfiguration message containing PSCell configuration. In other words, each PSCell configuration information item may be an RRC container containing one corresponding PSCell configuration.
- MN1 detects that all candidate PSCells proposed by MN1 or S-SN2 have been accepted by T-SN4.
- step 504 sends a MN RRC (connection) reconfiguration message to UE3 to instruct UE3 to conditional reconfiguration for CPC.
- the MN RRC reconfiguration message includes one or more CPC execution condition information items received from S-SN2 (step 501) and one or more PSCell configuration information items received from T-SN4 (step 503). encompasses
- UE 3 starts evaluation of CPC execution conditions. And UE3 starts the access to T-SN4 according to the CPC execution conditions of any candidate PSCell being satisfied.
- MN1 sends an SN Change Confirm message (e.g. SgNB Change Confirm, S-NODE Change Confirm) to S-SN2.
- This message informs S-SN2 that the resource allocation of T-SN4 for inter-SN CPC was successful.
- the SN Change Confirm message of step 505 causes S-SN2 to continue providing user data to UE3 until a future CPC run.
- S-SN2 receives the SN Change Confirm message but does not stop providing user data to UE3.
- the SN Change Confirm message may contain information indicating that this message is for inter-SN CPC.
- the transmission order of messages shown in FIG. 5 is only an example.
- the SN Change Confirm message of step 505 may be sent to S-SN2 prior to sending the MN RRC Reconfiguration message of step 504.
- MN1 in response to receiving the SN Addition Request Acknowledge message, MN1 may send a MN RRC Reconfiguration message to UE3 while sending an SN Change Confirm message to S-SN2.
- FIG. 6 shows an example of operations of MN1, S-SN2, T-SN4, and UE3.
- the procedure shown in FIG. 6 is based on the operation of MN1 shown in steps 301-303 and 305 of FIG. 3 and the operation of T-SN4 shown in FIG. Steps 601 and 602 are similar to steps 501 and 502 of FIG.
- T-SN4 responds to MN1 with an SN Addition Request Acknowledge message (e.g. SgNB Addition Request Acknowledge or S-NODE Addition Request Acknowledge).
- the message indicates that only a subset of candidate PSCells proposed by MN1 or S-SN2 have been accepted (or prepared).
- MN1 performs additional signaling with S-SN2 to receive one or more updated CPC execution condition information items. This additional signaling includes steps 604 and 605 .
- MN1 sends an internode message to S-SN2.
- the inter-node message may be an SN Change Confirm message (e.g. SgNB Change Confirm, S-NODE Change Confirm) or an SN Modification Request message (e.g. SgNB Modification Request, S-NODE Modification Request).
- the inter-node message indicates which candidate PSCell(s) have been accepted or rejected by T-SN4.
- S-SN2 responds to MN1 with another internode message.
- the inter-node message in step 605 may be a newly defined Xn/X2 message (e.g. SN Change Confirm Ack).
- the inter-node message of step 605 may be an SN Modification Request Acknowledge message (e.g. SgNB Modification Request Acknowledge, S-NODE Modification Request Acknowledge).
- the inter-node message of step 605 contains one or more updated CPC execution condition information items. These one or more updated CPC execution conditions information items indicate one or more CPC execution conditions for only one or more candidate PSCells accepted by T-SN4.
- These one or more updated CPC execution condition information items may be sent by inter-node message (step 605) using one or more containers transparent to MN1 (e.g. RRC containers).
- one CPC execution condition information item indicating a plurality of CPC execution conditions may be an information item whose contents are not recognized or cannot be recognized by MN1.
- MN1 After completion of additional signaling (i.e. steps 604 and 605), in step 606 MN1 sends a MN RRC (connection) reconfiguration message to UE3 to indicate conditional reconfiguration for CPC to UE3. do.
- the MN RRC reconfiguration message includes one or more CPC execution condition information items updated by S-SN2 (step 605) and one or more PSCell configuration information items received from T-SN4 (step 603). contain.
- ⁇ Second embodiment> A configuration example of a wireless communication network according to this embodiment is the same as the examples shown in FIGS. In the following, the behavior of MN1, S-SN2 and T-SN4 with respect to inter-SN CPC is described.
- FIG. 7 shows an example of the operation of MN1 regarding SN-initiated inter-SN CPC.
- MN1 receives a first inter-node message from S-SN2 indicating a request for SN-initiated inter-SN CPC.
- the first inter-node message may be an SN Change Required message (e.g. SgNB Change Required or S-NODE Change Required).
- the first node-to-node message includes a plurality of cell identification items each indicating a respective one of a plurality of candidate cells (candidate PSCells) and a plurality of cell identification items each associated with a respective one of the plurality of cell identification items.
- CPC execution condition information items e.g. SgNB Change Required or S-NODE Change Required
- Each CPC execution condition information item indicates the CPC execution condition for one corresponding candidate PSCell.
- Each CPC execution condition information item may be sent in a first internode message using a container transparent to MN1.
- each CPC execution condition information item may be an information item whose content is unrecognizable or unrecognizable by MN1.
- Each CPC execution condition information item may be an RRC container sent from S-SN2 to UE3 via MN1.
- Each cell identification information item is an information item that is opaque to MN1 (that is, recognizable by MN1).
- Each cell identification information item may indicate the identifier of a corresponding one of multiple candidate PSCells.
- Each cell identification information item may be, for example, Physical Cell ID (PCI) and carrier frequency (e.g. Absolute Radio Frequency Channel Number (ARFCN)), or CGI-info.
- PCI Physical Cell ID
- ARFCN Absolute Radio Frequency Channel Number
- CGI-info e.g. Absolute Radio Frequency Channel Number
- each CPC execution condition information item may be an information item transparent to MN1.
- Each CPC execution condition information item may contain one or more measurement identity (measId).
- FIG. 8 shows specific examples of cell identification information items and execution condition information items.
- the first inter-node message sent from S-SN2 to MN1 includes a CG-Config message 801, which is an inter-node RRC message.
- the CG-Config message 801 contains a CondExecutionCondList IE (or field) 802, which is an information element containing a cell identification information item and an execution condition information item.
- Each entry of the CondExecutionCondList IE 802 indicates information of one candidate PSCell (CPC-CandidateCellInfo (803)).
- each entry in the CondExecutionCondList IE 802 includes a cgi-Info field 804 and a CPC-ExecutionCond field 805 .
- the cgi-Info field 804 which may be a CGI-InfoNR IE, indicates candidate PSCell information including candidate PCell identifiers.
- a CPC-ExecutionCond field 805 indicates a CPC execution condition.
- the cgi-Info field 804 is opaque to MN1 and can be recognized by MN1.
- the CPC-ExecutionCond field 805 may be transparent to MN1.
- the MN1 may associate the CPC execution condition received in the CPC-ExecutionCond field 805 with the identifier of the candidate PSCell and transfer it to the UE3 as it is in the MN RRC (connection) reconfiguration message.
- MN1 can identify the CPC execution condition information item for a certain candidate PSCell (cell identifier) by the association between cgi-Info field 804 and CPC-ExecutionCond field 805 .
- FIG. 9 shows another specific example of the cell identification information item and execution condition information item.
- the first inter-node message is the SgNB Change Required message.
- This SgNB Change Required message contains a list of candidate PSCells proposed by S-SN2 (e.g. Candidate Cells to be Prepared List IE).
- a Candidate Cells to be Prepared List IE contains one or more Candidate Cells to be Prepared Item IEs.
- Each Candidate Cells to be Prepared Item IE contains a Candidate cell ID IE and an RRC Container IE.
- Candidate cell ID IE indicates an identifier (e.g., NR-CGI, ECGI) of one candidate PSCell.
- RRC Container IE contains CPC execution conditions. That is, one pair of Candidate cell ID IE and RRC Container IE included in each Candidate Cells to be Prepared Item IE indicates association between one candidate PSCell and the CPC execution condition for the candidate PSCell.
- the MN1 may link the CPC execution condition received by the RRC Container IE with the identifier of the candidate PSCell and transfer it to the UE3 as it is in the MN RRC (connection) reconfiguration message. Therefore, the information contained in the RRC Container IE may be transparent to MN1.
- MN1 can identify the CPC execution condition information item for a certain candidate PSCell (cell identifier) by the pair of Candidate cell ID IE and RRC Container IE.
- MN1 sends a second inter-node message to T-SN4 indicating a request for inter-SN CPC and containing information of multiple candidate PSCells.
- the second inter-node message may be an SN Addition Request message (e.g. SgNB Addition Request or S-NODE Addition Request).
- the third inter-node message may be an SN Addition Request Acknowledge message (e.g. SgNB Addition Request Acknowledge or S-NODE Addition Request Acknowledge).
- the third inter-node message contains one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells.
- Each PSCell configuration may be an SCG configuration.
- Each PSCell configuration information item may be an SN RRC Reconfiguration message containing PSCell configuration.
- each PSCell configuration information item may be an RRC container containing one corresponding PSCell configuration.
- the third inter-node message may contain a list of inter-node RRC messages for each of the candidate PSCells accepted by T-SN4 (e.g. a list of CG-Config).
- MN1 extracts one or more CPC execution information items corresponding to one or more accepted candidate PSCells from the plurality of CPC execution condition information items received by S-SN2 (step 701). select.
- a MN RRC (connection) reconfiguration message is sent to UE3 to instruct UE3 to conditional reconfiguration for CPC.
- the MN RRC reconfiguration message includes one or more CPC execution information items selected in step 704 and one or more PSCell configuration information items received from T-SN4 (step 703).
- FIG. 10 shows an example of the operation of S-SN2.
- S-SN1 decides to initiate inter-SN CPC for the PSCell of SCG of UE1.
- Step 1002 corresponds to step 701 in FIG. Specifically, S-SN2 sends a first inter-node message to MN1 indicating a request for SN-initiated inter-SN CPC.
- the first inter-node message may be an SN Change Required message (e.g. SgNB Change Required or S-NODE Change Required).
- the first node-to-node message includes a plurality of cell identification items each indicating a respective one of the plurality of candidate PSCells and a plurality of CPC execution conditions each associated with a respective one of the plurality of cell identification items. information items. Specific examples of multiple cell identification information items and multiple CPC execution condition information items are the same as those described with respect to step 701 in FIG.
- MN1 will send S-SN2 regardless of whether all of the candidate PSCells proposed by MN1 or S-SN2 have been accepted by T-SN4.
- MN RRC reconfiguration message to instruct the CPC while skipping the additional signaling with or without waiting for the completion of the additional signaling to UE3. Therefore, this can prevent additional delays in CPC preparation due to additional signaling.
- FIG. 11 shows an example of operations of MN1, S-SN2, T-SN4, and UE3.
- the procedure shown in FIG. 11 is based on the operation of MN1 shown in FIG. 7 and the operation of S-SN2 shown in FIG.
- S-SN2 initiates the inter-SN CPC procedure by sending a SN Change Required message (e.g. SgNB Change Required or S-NODE Change Required) to MN1.
- S-SN2 indicates CPC initiation to MN1.
- the message contains the identifier of T-SN4.
- the message further comprises a plurality of cell identification information items each indicating a respective one of the plurality of candidate PSCells, and a plurality of CPC execution condition information items each associated with a respective one of the plurality of cell identification information items.
- S-SN2 may include the identity of the candidate PSCells in the message.
- MN1 requests T-SN4 to allocate resources for UE3 using the SN Addition procedure. Specifically, MN1 sends an SN Addition Request message (e.g. SgNB Addition Request or S-NODE Addition Request) to T-SN4. This message indicates the CPC initiation to T-SN4 and indicates multiple candidate PSCells to T-SN4. In this message, MN1 may provide the upper limit (or maximum number) of candidate PSCells to T-SN4.
- SN Addition Request message e.g. SgNB Addition Request or S-NODE Addition Request
- T-SN4 responds to MN1 with an SN Addition Request Acknowledge message (e.g. SgNB Addition Request Acknowledge or S-NODE Addition Request Acknowledge).
- the message contains information indicating one or more candidate PSCells accepted by T-SN4. Additionally or alternatively, the message includes one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells.
- Each PSCell configuration may be an SCG configuration.
- Each PSCell configuration information item may be an SN RRC Reconfiguration message containing PSCell configuration. In other words, each PSCell configuration information item may be an RRC container containing one corresponding PSCell configuration.
- MN1 can know one or more candidate PSCells accepted by T-SN4 by checking the SN Addition Request Acknowledge message.
- MN1 extracts one or more CPC execution information items corresponding to one or more accepted candidate PSCells from the plurality of CPC execution condition information items received by S-SN2 (step 1101). select.
- a MN RRC (connection) reconfiguration message is sent to UE3 to instruct UE3 to conditional reconfiguration for CPC.
- the MN RRC reconfiguration message includes one or more CPC execution information items selected in step 1104 and one or more PSCell configuration information items received from T-SN4 (step 1103).
- UE 3 Upon receiving the MN RRC reconfiguration message, UE 3 starts evaluation of CPC execution conditions. And UE3 starts the access to T-SN4 according to the CPC execution conditions of any candidate PSCell being satisfied.
- MN1 sends an SN Change Confirm message (e.g. SgNB Change Confirm, S-NODE Change Confirm) to S-SN2.
- This message informs S-SN2 that the resource allocation of T-SN4 for inter-SN CPC was successful.
- the SN Change Confirm message of step 1106 causes S-SN2 to continue providing user data to UE3 until a future CPC run.
- S-SN2 receives the SN Change Confirm message but does not stop providing user data to UE3.
- the SN Change Confirm message may contain information indicating that this message is for inter-SN CPC.
- the transmission order of messages shown in FIG. 11 is only an example.
- the SN Change Confirm message of step 1106 may be sent to S-SN2 prior to sending the MN RRC Reconfiguration message of step 1105.
- MN1 in response to receiving the SN Addition Request Acknowledge message, MN1 may send a MN RRC Reconfiguration message to UE3 while sending an SN Change Confirm message to S-SN2.
- the SN Change Confirm message of step 1106 may indicate to S-SN2 which candidate PSCell(s) have been accepted or rejected (ie not accepted) by T-SN4.
- S-SN2 may perform additional signaling with MN1 to modify or update one or more CPC execution conditions sent to UE1.
- S-SN2 may send additional inter-node messages to MN1.
- the inter-node message may be an SN Modification Required message (e.g. SgNB Modification Required, S-NODE Modification Required).
- the internode message may be a newly defined Xn/X2 message (e.g. SN Change Confirm Ack).
- the inter-node message may include at least one updated CPC execution condition information item for at least one of the one or more candidate PSCells accepted by T-SN4.
- MN1 may send a second MN RRC reconfiguration message including the at least one updated CPC execution condition information item to UE3.
- the second MN RRC reconfiguration message causes UE3 to replace the current CPC execution information with the corresponding CPC execution information contained in the newly received CPC execution information item.
- a configuration example of a wireless communication network according to this embodiment is the same as the examples shown in FIGS. In the following, the behavior of MN1, S-SN2 and T-SN4 with respect to inter-SN CPC is described.
- FIG. 12 shows an example of the operation of MN1 for inter-SN CPC.
- This inter-SN CPC may be initiated by MN1 or may be initiated by S-SN2.
- MN1 sends a MN RRC (connection) reconfiguration message to UE3 to instruct UE3 to conditional reconfiguration for CPC.
- the MN RRC reconfiguration message includes CPC execution conditions and PSCell configuration (or SCG configuration) of candidate PSCells.
- MN1 receives from UE3 the first MN RRC reconfiguration complete message that is a response to the MN RRC reconfiguration message in step 1201.
- the first MN RRC reconfiguration complete message does not include an SN RRC response message (SN RRC reconfiguration complete message) addressed to T-SN4.
- MN1 receives the second MN RRC reconfiguration complete message transmitted from UE3 in response to CPC execution to any candidate PSCell or establishment of CPC execution conditions.
- the second MN RRC reconfiguration complete message includes an SN RRC response message (SN RRC reconfiguration complete message) addressed to T-SN4.
- MN1 transmits a Conditional PSCell Change Notification message to S-SN2 in response to receiving the second MN RRC reconfiguration complete message (step 1203).
- the Conditional PSCell Change Notification message may cause S-SN2 to stop providing user data to UE3.
- MN1 in response to receiving the second MN RRC reconfiguration complete message (step 1203), MN1 transmits the SN RRC reconfiguration complete message included in the second MN RRC reconfiguration complete message to SN Reconfiguration It may be forwarded to T-SN4 via a Complete message.
- MN1 sends a Conditional PSCell Change Notification message to S in response to CPC (execution) being triggered or in response to CPC execution conditions being satisfied.
- - Send to SN2. This can optimize the transmission timing of Conditional PSCell Change Notification messages.
- FIG. 13 shows an example of operations of MN1, S-SN2, T-SN4, and UE3 regarding SN-initiated inter-SN CPC.
- S-SN2 initiates the inter-SN CPC procedure by sending a SN Change Required message (e.g. SgNB Change Required or S-NODE Change Required) to MN1.
- SN Change Required message e.g. SgNB Change Required or S-NODE Change Required
- S-SN2 indicates CPC initiation to MN1.
- the message contains the identifier of T-SN4.
- the message further includes CPC execution conditions.
- MN1 may or may not be able to comprehend the CPC execution conditions set by S-SN2.
- MN1 requests T-SN4 to allocate resources for UE3 using the SN Addition procedure. Specifically, MN1 sends an SN Addition Request message (e.g. SgNB Addition Request or S-NODE Addition Request) to T-SN4. In this message, MN1 may indicate CPC initiation to T-SN4 and provide an upper limit of candidate PSCells to T-SN4.
- SN Addition Request message e.g. SgNB Addition Request or S-NODE Addition Request
- T-SN4 sends the PSCell ID(s) of one or more accepted (or prepared) candidate PSCells to MN1 via an SN Addition Request Acknowledge message.
- T-SN4 sends the PSCell configuration (or SCG configuration) of each accepted candidate PSCell to MN1 via an SN Addition Request Acknowledge message.
- MN1 sends a MN RRC (connection) reconfiguration message to UE3 to instruct UE3 to conditional reconfiguration for CPC.
- the MN RRC reconfiguration message includes CPC settings (e.g. Conditional Reconfiguration IE), and the CPC settings include CPC execution conditions set by S-SN2 and PSCell settings (or SCG settings) set by T-SN4.
- UE3 transmits to MN1 the first MN RRC reconfiguration complete message, which is a response to the MN RRC reconfiguration message in step 1304.
- the first MN RRC reconfiguration complete message does not include an SN RRC response message (SN RRC reconfiguration complete message) addressed to T-SN4.
- MN1 sends an SN Change Confirm message (e.g. SgNB Change Confirm, S-NODE Change Confirm) to S-SN2.
- MN1 sends an SN Change Confirm message (step 1306) to S-SN2 before receiving the MN RRC Reconfiguration Complete message (step 1305) or before sending the MN RRC Reconfiguration message (step 1304).
- the SN Change Confirm message informs S-SN2 that the resource allocation of T-SN4 for the inter-SN CPC was successful.
- the SN Change Confirm message causes S-SN2 to continue providing user data to UE3 until a future CPC run. In other words, S-SN2 receives the SN Change Confirm message but does not stop providing user data to UE3.
- the SN Change Confirm message may contain information indicating that this message is for inter-SN CPC.
- UE3 maintains the connection with S-SN2 even after receiving the MN RRC reconfiguration message (step 1304), and starts evaluating the CPC execution condition set by the MN RRC reconfiguration message. Then, in step 1307, UE3 detects that the CPC execution condition for any candidate PSCell is satisfied. In step 1308, UE3 sends a second MN RRC reconfiguration complete message to MN1 in response to the fulfillment of the CPC execution condition.
- the second MN RRC reconfiguration complete message includes an SN RRC response message (SN RRC reconfiguration complete message) addressed to T-SN4.
- MN1 notifies T-SN4 of the success of the SN RRC Reconfiguration procedure via the SN Reconfiguration Complete message.
- the SN Reconfiguration Complete message forwards the SN RRC reconfiguration complete message included in the second MN RRC reconfiguration complete message to T-SN4.
- MN1 sends a Conditional PSCell Change Notification message to S-SN2 in response to receiving the second MN RRC reconfiguration complete message (step 1308).
- the Conditional PSCell Change Notification message may cause S-SN2 to stop providing user data to UE3.
- the order of steps 1309 and 1310 is not limited to that shown in FIG. MN1 may send the Conditional PSCell Change Notification message to S-SN2 before sending the SN RRC reconfiguration complete message (step 1309).
- FIG. 14 shows an example of operations of MN1, S-SN2, T-SN4, and UE3 regarding MN-initiated inter-SN CPC.
- MN1 initiates the inter-SN CPC procedure by requesting T-SN4 to allocate resources for UE3 using the SN Addition procedure.
- MN1 sends an SN Addition Request message (e.g. SgNB Addition Request or S-NODE Addition Request) to T-SN4.
- MN1 may indicate CPC initiation to T-SN4 and provide an upper limit (or maximum number) of candidate PSCells to T-SN4.
- T-SN4 sends the PSCell ID(s) of one or more prepared candidate PSCells to MN1 via an SN Addition Request Acknowledge message.
- T-SN4 sends PSCell configuration (or SCG configuration) to MN1 via SN Addition Request Acknowledge message.
- MN1 sends an SN Release Request message (e.g. SgNB Release Request, S-NODE Release Request) to S-SN2.
- the SN Release Request message informs S-SN2 that the resource allocation of T-SN4 for inter-SN CPC was successful.
- the SN Release Request message causes S-SN2 to continue providing user data to UE3 until a future CPC run.
- S-SN2 receives the SN Release Request but does not stop providing user data to UE3.
- the SN Release Request may contain information indicating that this message is for inter-SN CPC.
- S-SN2 responds to MN1 with an SN Release Request Acknowledge message.
- MN1 generates CPC execution conditions.
- MN1 generates a CPC setting (e.g. Conditional Reconfiguration IE) that includes the CPC execution condition generated by MN1 and the PSCell setting (or SCG setting) received from T-SN4.
- CPC setting e.g. Conditional Reconfiguration IE
- PSCell setting or SCG setting
- MN1 sends the CPC configuration to UE3 via the MN RRC (Connection) Reconfiguration message.
- the MN RRC reconfiguration message instructs UE3 to perform conditional reconfiguration for CPC.
- UE3 sends the first MN RRC reconfiguration complete message, which is a response to the MN RRC reconfiguration message at step 1405, to MN1.
- the first MN RRC reconfiguration complete message does not include an SN RRC response message (SN RRC reconfiguration complete message) addressed to T-SN4.
- UE3 maintains the connection with S-SN2 even after receiving the MN RRC reconfiguration message (step 1405), and starts evaluating the CPC execution condition set by the MN RRC reconfiguration message. Then, in step 1407, UE3 detects that the CPC execution condition for any candidate PSCell is satisfied. At step 1408, UE3 sends a second MN RRC reconfiguration complete message to MN1 in response to the fulfillment of the CPC execution condition.
- the second MN RRC reconfiguration complete message includes an SN RRC response message (SN RRC reconfiguration complete message) addressed to T-SN4.
- step 1409 MN1 notifies T-SN4 of the success of the SN RRC Reconfiguration procedure via the SN Reconfiguration Complete message.
- the SN Reconfiguration Complete message forwards the SN RRC reconfiguration complete message included in the second MN RRC reconfiguration complete message to T-SN4.
- MN1 sends a Conditional PSCell Change Notification message to S-SN2 in response to receiving the second MN RRC reconfiguration complete message (step 1408).
- the Conditional PSCell Change Notification message may cause S-SN2 to stop providing user data to UE3.
- the order of steps 1409 and 1410 is not limited to that shown in FIG. MN1 may send the Conditional PSCell Change Notification message to S-SN2 before sending the SN RRC reconfiguration complete message (step 1409).
- FIG. 15 is a block diagram showing a configuration example of MN1 according to the above embodiment.
- the configuration of S-SN2 and T-SN4 may also be similar to the configuration shown in FIG.
- MN1 includes Radio Frequency transceiver 1501, network interface 1503, processor 1504 and memory 1505.
- FIG. RF transceiver 1501 performs analog RF signal processing to communicate with UEs, including UE3.
- RF transceiver 1501 may include multiple transceivers.
- RF transceiver 1501 is coupled to antenna array 1502 and processor 1504 .
- RF transceiver 1501 receives modulation symbol data from processor 1504 , generates transmit RF signals, and provides the transmit RF signals to antenna array 1502 . RF transceiver 1501 also generates baseband received signals based on the received RF signals received by antenna array 1502 and provides them to processor 1504 . RF transceiver 1501 may include analog beamformer circuitry for beamforming. The analog beamformer circuit includes, for example, multiple phase shifters and multiple power amplifiers.
- the network interface 1503 is used to communicate with network nodes (e.g. S-SN2, T-SN4, and control and forwarding nodes of the core network).
- Network interface 1503 may include, for example, an IEEE 802.3 series compliant network interface card (NIC).
- NIC network interface card
- a processor 1504 performs digital baseband signal processing (data plane processing) and control plane processing for wireless communication.
- Processor 1504 may include multiple processors.
- the processor 1504 includes a modem processor (e.g. Digital Signal Processor (DSP)) for digital baseband signal processing and a protocol stack processor (e.g. Central Processing Unit (CPU) or Micro Processing Unit (MPU) for control plane processing).
- DSP Digital Signal Processor
- a protocol stack processor e.g. Central Processing Unit (CPU) or Micro Processing Unit (MPU) for control plane processing.
- Processor 1504 may include a digital beamformer module for beamforming.
- a digital beamformer module may include a Multiple Input Multiple Output (MIMO) encoder and precoder.
- MIMO Multiple Input Multiple Output
- the memory 1505 is configured by a combination of volatile memory and non-volatile memory.
- Volatile memory is, for example, Static Random Access Memory (SRAM) or Dynamic RAM (DRAM) or a combination thereof.
- the non-volatile memory is masked Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, or hard disk drive, or any combination thereof.
- Memory 1505 may include storage remotely located from processor 1504 . In this case, processor 1504 may access memory 1505 via network interface 1503 or an I/O interface (not shown).
- Memory 1505 may store one or more software modules (computer programs) 1506 containing instructions and data for processing by MN1 as described in the above embodiments.
- the processor 1504 may be configured to retrieve and execute the software module 1506 from the memory 1505 to perform the processing of MN1 described in the above embodiments.
- MN1 may not include RF transceiver 1501 (and antenna array 1502).
- FIG. 16 is a block diagram showing a configuration example of UE3.
- Radio Frequency (RF) transceiver 1601 performs analog RF signal processing to communicate with MN1, S-SN2 and T-SN4.
- RF transceiver 1601 may include multiple transceivers.
- Analog RF signal processing performed by RF transceiver 1601 includes frequency upconversion, frequency downconversion, and amplification.
- RF transceiver 1601 is coupled with antenna array 1602 and baseband processor 1603 .
- RF transceiver 1601 receives modulation symbol data (or OFDM symbol data) from baseband processor 1603 , generates transmit RF signals, and provides transmit RF signals to antenna array 1602 .
- RF transceiver 1601 also generates baseband received signals based on the received RF signals received by antenna array 1602 and provides them to baseband processor 1603 .
- RF transceiver 1601 may include analog beamformer circuitry for beamforming.
- the analog beamformer circuit includes, for example, multiple phase shifters and multiple power amplifiers.
- the baseband processor 1603 performs digital baseband signal processing (data plane processing) and control plane processing for wireless communication.
- Digital baseband signal processing consists of (a) data compression/decompression, (b) data segmentation/concatenation, (c) transmission format (transmission frame) generation/decomposition, and (d) channel coding/decoding. , (e) modulation (symbol mapping)/demodulation, and (f) generation of OFDM symbol data (baseband OFDM signal) by Inverse Fast Fourier Transform (IFFT).
- Control plane processing includes layer 1 (e.g. transmit power control), layer 2 (e.g. radio resource management and hybrid automatic repeat request (HARQ) processing), and layer 3 (e.g. signaling for attach, mobility and call management). communication management.
- layer 1 e.g. transmit power control
- layer 2 e.g. radio resource management and hybrid automatic repeat request (HARQ) processing
- layer 3 e.g. signaling for attach, mobility and call management.
- the digital baseband signal processing by the baseband processor 1603 includes signal processing of the Service Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, MAC layer, and PHY layer. may contain.
- SDAP Service Data Adaptation Protocol
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Management Function
- PHY Packet Data Convergence Protocol
- Control plane processing by the baseband processor 1603 may also include processing of Non-Access Stratum (NAS) protocols, RRC protocols, and MAC Control Element (CE).
- NAS Non-Access Stratum
- RRC protocols Radio Link Control
- CE MAC Control Element
- the baseband processor 1603 may perform MIMO encoding and precoding for beamforming.
- the baseband processor 1603 may include a modem processor (e.g. DSP) that performs digital baseband signal processing and a protocol stack processor (e.g. CPU or MPU) that performs control plane processing.
- a modem processor e.g. DSP
- a protocol stack processor e.g. CPU or MPU
- the protocol stack processor that performs control plane processing may be shared with the application processor 1604, which will be described later.
- the application processor 1604 is also called CPU, MPU, microprocessor, or processor core.
- the application processor 1604 may include multiple processors (multiple processor cores).
- the application processor 1604 includes a system software program (Operating System (OS)) read from the memory 1606 or a memory (not shown) and various application programs (for example, call application, WEB browser, mailer, camera operation application, music playback, etc.).
- OS Operating System
- application programs for example, call application, WEB browser, mailer, camera operation application, music playback, etc.
- Various functions of UE3 are realized by executing the application).
- the baseband processor 1603 and application processor 1604 may be integrated on one chip, as indicated by the dashed line (1605) in FIG.
- baseband processor 1603 and application processor 1604 may be implemented as one System on Chip (SoC) device 1605 .
- SoC devices are sometimes called system Large Scale Integration (LSI) or chipsets.
- the memory 1606 is volatile memory, non-volatile memory, or a combination thereof.
- Memory 1606 may include multiple physically independent memory devices. Volatile memory is, for example, SRAM or DRAM or a combination thereof. Non-volatile memory is MROM, EEPROM, flash memory, or hard disk drive, or any combination thereof.
- memory 1606 may include external memory devices accessible from baseband processor 1603 , application processor 1604 , and SoC 1605 .
- Memory 1606 may include embedded memory devices integrated within baseband processor 1603 , within application processor 1604 , or within SoC 1605 . Additionally, memory 1606 may include memory within a Universal Integrated Circuit Card (UICC).
- UICC Universal Integrated Circuit Card
- the memory 1606 may store one or more software modules (computer programs) 1607 containing instructions and data for processing by the UE 3 as described in multiple embodiments above.
- the baseband processor 1603 or application processor 1604 is configured to read and execute the software module 1607 from memory 1606 to perform the processing of UE3 illustrated in the above embodiments. may be
- control plane processing and operations performed by UE 3 as described in the above embodiments are performed by other elements besides RF transceiver 1601 and antenna array 1602 : baseband processor 1603 and/or application processor 1604 and software module 1607 . can be implemented by a memory 1606 that stores the
- each of the processors of MN1, S-SN2, T-SN4, and UE3 causes the computer to perform the algorithm described with reference to the drawings.
- One or more programs may be executed that contain instructions for causing the A program includes instructions (or software code) that, when read into a computer, cause the computer to perform one or more of the functions described in the embodiments.
- the program may be stored in a non-transitory computer-readable medium or tangible storage medium.
- computer readable media or tangible storage media may include random-access memory (RAM), read-only memory (ROM), flash memory, solid-state drives (SSD) or other memory technology, CDs - ROM, digital versatile disk (DVD), Blu-ray disc or other optical disc storage, magnetic cassette, magnetic tape, magnetic disc storage or other magnetic storage device.
- the program may be transmitted on a transitory computer-readable medium or communication medium.
- transitory computer readable media or communication media include electrical, optical, acoustic, or other forms of propagated signals.
- T-SN4 selects candidate PSCells to be targeted by CPC from one or more candidate PSCells proposed by S-SN2.
- T-SN 4 may itself select one or more other cells as PSCell candidates that are different from (ie, not included in) the proposed candidate PSCells.
- T-SN4 transmits information indicating one or more candidate PSCells proposed by S-SN2 and accepted by T-SN4 and the candidate PSCells selected by T-SN4 to the third node.
- a message may be sent to MN1.
- T-SN4 also sends the PSCell configuration (or SCG configuration) for each of its self-selected candidate PSCells to MN1.
- MN1 receives one or more other candidate PSCells from T-SN4 (that is, the PSCell selected by T-SN4 itself. candidate cell), it sends information about this to S-SN2.
- S-SN2 sends an updated CPC execution condition information item to MN1.
- the updated CPC execution condition information item includes at least the CPC execution condition for the PSCell candidate cell selected by T-SN4.
- T-SN4 sends information of one or more accepted candidate PSCells to M-SN1 in a third internode message.
- T-SN 4 may then generate an inter-node RRC message (e.g. CG-Config) for each of the one or more candidate PSCells and include it in a third inter-node message.
- CG-Config equal to the number of candidate PSCells accepted by T-SN4 (N) may be included as an RRC container of T-SN4 associates each of the X2/Xn level information items indicating accepted candidate PSCells with each of the relevant inter-node RRC messages (e.g. CG-Config) (for example, in list form), and sends them to MN1. You may send.
- a Radio Access Network (RAN) node configured to operate as a Master Node (MN) associated with a Master Cell Group (MCG) in dual connectivity for User Equipment (UE), at least one memory; at least one processor coupled to the at least one memory; with The at least one processor Receive a first inter-node message from a source Secondary Node (SN) indicating a request for an SN-initiated inter-SN Conditional PSCell Change (CPC), wherein the first inter-node message is a plurality of candidate Primary SCG Cells contains one or more CPC execution condition information items indicating a plurality of CPC execution conditions each associated with a respective one of the (PSCells); sending a second inter-node message to the target SN indicating a request for an inter-SN CPC and containing information of the plurality of candidate PSCells; receiving a third inter-node message from said target SN, wherein said third inter-node message includes one or more PSCell configurations each indicating
- the additional signaling is sending a fourth inter-node message to the source SN indicating the one or more accepted candidate PSCells or the one or more candidate PSCells rejected by the target SN; and receiving by said MN from said source SN a fifth inter-node message containing an updated CPC execution condition information item; including, The RAN node according to Appendix 1 or 2.
- the one or more CPC execution condition information items are sent by the first internode message using one or more containers transparent to the MN; The RAN node according to any one of Appendixes 1-3.
- RAN radio access network
- MN Master Node
- MCG Master Cell Group
- UE User Equipment
- the method comprises: receiving from a source Secondary Node (SN) a first inter-node message indicating a request for an SN-initiated inter-SN Conditional PSCell Change (CPC), wherein the first inter-node message is a plurality of candidate Primary SCGs; contains one or more CPC execution condition information items indicating a plurality of CPC execution conditions each associated with a respective one of the Cells (PSCells); sending a second inter-node message to the target SN indicating a request for an inter-SN CPC and containing information of said plurality of candidate PSCells; receiving a third inter-node message from said target SN, wherein said third inter-node message is one or more each indicating a respective one PSCell configuration of one or more accepted candidate PSCells and the third inter-node message indicates to the MN whether all of the plurality of candidate PSCells have been accepted; If the third inter-node message indicates that all of the plurality of candidate PSC
- the third inter-node message indicates that only one has been accepted, perform the additional signaling with the source SN to receive one or more updated CPC execution condition information items; transmitting to the UE a first MN RRC reconfiguration message including the above updated CPC execution condition information item and the one or more PSCell configuration information items; program.
- a Radio Access Network (RAN) node configured to operate as a Target Secondary Node (SN) associated with a Secondary Cell Group (SCG) in dual connectivity for User Equipment (UE), at least one memory; at least one processor coupled to the at least one memory; with The at least one processor receiving a second inter-node message from a Master Node (MN) indicating a request for an inter-SN Conditional PSCell Change (CPC) and containing information for a plurality of candidate Primary SCG Cells (PSCells); configured to send a third node-to-node message to the MN;
- the third inter-node message includes one or more PSCell configuration information items each indicating one PSCell configuration of each of the one or more accepted candidate PSCells, the third inter-node message is , indicating to the MN whether all of the plurality of candidate PSCells have been accepted; RAN node.
- RAN Radio Access Network
- MN Master Node
- PSCells Primary SCG Cells
- the third inter-node message includes one or more PSCell configuration information items each indicating one PSCell configuration of each of the one or more accepted candidate PSCells, the third inter-node message is , indicating to the MN whether all of the plurality of candidate PSCells have been accepted;
- Method. Appendix 10
- a computer performs a method for a Radio Access Network (RAN) node configured to operate as a Target Secondary Node (SN) associated with a Secondary Cell Group (SCG) in dual connectivity for User Equipment (UE).
- RAN Radio Access Network
- SN Target Secondary Node
- SCG Secondary Cell Group
- MN Master Node
- PSCells Primary SCG Cells
- the third inter-node message includes one or more PSCell configuration information items each indicating one PSCell configuration of each of the one or more accepted candidate PSCells, the third inter-node message is , indicating to the MN whether all of the plurality of candidate PSCells have been accepted; program.
- a Radio Access Network (RAN) node configured to operate as a Master Node (MN) associated with a Master Cell Group (MCG) in dual connectivity for User Equipment (UE), at least one memory; at least one processor coupled to the at least one memory; with The at least one processor Receive a first inter-node message from a source Secondary Node (SN) indicating a request for an SN-initiated inter-SN Conditional PSCell Change (CPC), wherein the first inter-node message is a plurality of candidate Primary SCG Cells (PSCells), and a plurality of CPC execution condition information items each associated with a respective one of said plurality of cell identification information items; sending a second inter-node message to the target SN indicating a request for an inter-SN CPC and containing information of the plurality of candidate PSCells; receiving a third inter-node message from the target SN containing one or more PSCell configuration information items each indicating one PSCell configuration for each of the
- MN Master
- the at least one processor sending a fourth inter-node message to the source SN indicating the one or more accepted candidate PSCells or the one or more candidate PSCells rejected by the target SN; configured to receive a fifth internode message from the source SN after sending the fourth internode message; the first MN RRC reconfiguration message is sent to the UE before the MN receives the fifth inter-node message;
- the RAN node according to Supplementary Note 11.
- the fifth inter-node message includes at least one updated CPC execution condition information item for at least one of the one or more accepted candidate PSCells;
- the at least one processor is configured to send a second MN RRC reconfiguration message containing the at least one updated CPC execution condition information item to the UE.
- the RAN node according to Supplementary Note 12.
- said plurality of cell identity items are sent by said first internode message to said MN in an opaque manner; each of the plurality of CPC execution condition information items is sent by the first internode message using a container transparent to the MN; 14.
- the RAN node according to any one of appendices 11-13.
- the first inter-node message is an SN Change Required message
- the second inter-node message is an SN Addition Request message
- the third inter-node message is an SN Addition Request Acknowledge message; 15.
- the RAN node according to any one of appendices 11-14.
- the fourth node-to-node message is an SN Change Confirm message;
- (Appendix 17) wherein the fifth inter-node message is an SN Modification Required message; 17.
- Radio Resource Control (RRC) reconfiguration message containing the item and the one or more PSCell configuration information items; How to prepare.
- RRC Radio Resource Control
- Appendix 19 To cause a computer to perform a method for a Radio Access Network (RAN) node configured to operate as a Master Node (MN) associated with a Master Cell Group (MCG) in dual connectivity for User Equipment (UE).
- RAN Radio Access Network
- MN Master Node
- MCG Master Cell Group
- UE User Equipment
- the method comprises: receiving from a source Secondary Node (SN) a first inter-node message indicating a request for an SN-initiated inter-SN Conditional PSCell Change (CPC), wherein the first inter-node message is a plurality of candidate Primary SCGs; a plurality of cell identification information items each indicating a respective one of the Cells (PSCells), and a plurality of CPC execution condition information items each associated with a respective one of the plurality of cell identification information items; sending a second inter-node message to the target SN indicating a request for an inter-SN CPC and containing information of said plurality of candidate PSCells; receiving a third inter-node message from said target SN containing one or more PSCell configuration information items each indicating one PSCell configuration for each of the one or more accepted candidate PSCells; selecting one or more CPC execution information items corresponding to the one or more accepted candidate PSCells from the plurality of CPC execution condition information items; and
- a Radio Access Network (RAN) node configured to operate as a Source Secondary Node (SN) associated with a Secondary Cell Group (SCG) in dual connectivity for User Equipment (UE), at least one memory; at least one processor coupled to the at least one memory; with The at least one processor is configured to send a first inter-node message indicating a request for an SN-initiated inter-SN Conditional PSCell Change (CPC) to a Master Node (MN), wherein:
- the message comprises a plurality of cell identification items each indicating a respective one of a plurality of candidate Primary SCG Cells (PSCells) and a plurality of CPC execution conditions each associated with a respective one of said plurality of cell identification items.
- the first inter-node message selects one or more CPC execution information items corresponding to one or more accepted candidate PSCells accepted by the target SN from among the plurality of CPC execution condition information items. enabling said MN to 21.
- said plurality of cell identity items are sent by said first internode message to said MN in an opaque manner; each of the plurality of CPC execution condition information items is sent by the first internode message using a container transparent to the MN; 22.
- the RAN node according to any one of appendices 20-22.
- Appendix 24 A method performed by a Radio Access Network (RAN) node configured to operate as a Source Secondary Node (SN) associated with a Secondary Cell Group (SCG) in dual connectivity for User Equipment (UE), comprising: The method comprises sending a first inter-node message indicating a SN-initiated inter-SN Conditional PSCell Change (CPC) request to a Master Node (MN), wherein the first inter-node message is: a plurality of cell identification information items each indicating a respective one of a plurality of candidate Primary SCG Cells (PSCells); and a plurality of CPC execution condition information items each associated with a respective one of said plurality of cell identification information items.
- CPC Inter-node message
- MN Master Node
- PSCells Primary SCG Cells
- a computer performs a method for a Radio Access Network (RAN) node configured to operate as a source Secondary Node (SN) associated with a Secondary Cell Group (SCG) in dual connectivity for User Equipment (UE).
- RAN Radio Access Network
- SN Secondary Node
- SCG Secondary Cell Group
- UE User Equipment
- the method comprises sending a first inter-node message indicating a SN-initiated inter-SN Conditional PSCell Change (CPC) request to a Master Node (MN), wherein the first inter-node message is: a plurality of cell identification information items each indicating a respective one of a plurality of candidate Primary SCG Cells (PSCells); and a plurality of CPC execution condition information items each associated with a respective one of said plurality of cell identification information items.
- CPC Inter-node message
- a Radio Access Network (RAN) node configured to operate as a Master Node (MN) associated with a Master Cell Group (MCG) in dual connectivity for User Equipment (UE), at least one memory; at least one processor coupled to the at least one memory; with The at least one processor Sending to the UE an MN Radio Resource Control (RRC) reconfiguration message containing an inter-SN Conditional PSCell Change (CPC) execution condition and a candidate Primary SCG Cell (PSCell) configuration; receiving from the UE a first MN RRC reconfiguration complete message that is a response to the MN RRC reconfiguration message; receiving a second MN RRC reconfiguration complete message transmitted from the UE in response to execution of the CPC or establishment of the execution condition; configured to send a Conditional PSCell Change Notification message to a source Secondary Node (SN) in response to receiving the second MN RRC reconfiguration complete message; RAN node.
- MN Master Node
- MCG Master Cell Group
- PSCell Primary SCG Cell
- the Conditional PSCell Change Notification message causes the source SN to stop providing user data to the UE; 27.
- the second MN RRC reconfiguration complete message includes an SN RRC reconfiguration complete message;
- the at least one processor is configured to forward the SN RRC reconfiguration complete message to a target SN via an SN Reconfiguration Complete message in response to receiving the second MN RRC reconfiguration complete message. 28.
- the at least one processor configured to send an SN Release Request message or an SN Change Confirm message to the source SN during the inter-SN CPC preparation procedure prior to receiving the second MN RRC reconfiguration complete message; 29.
- the RAN node according to any one of clauses 26-28.
- the SN Release Request message or the SN Change Confirm message causes the source SN to continue providing user data to the UE until the CPC is executed; 29.
- the SN Release Request message or the SN Change Confirm message contains information indicating that this message is for inter-SN CPC, 31.
- RRC Radio Resource Control
- CPC inter-SN Conditional PSCell Change
- PSCell Primary SCG Cell
- the method comprises: Sending to the UE an MN Radio Resource Control (RRC) reconfiguration message containing inter-SN Conditional PSCell Change (CPC) execution conditions and candidate Primary SCG Cell (PSCell) configuration; receiving from the UE a first MN RRC reconfiguration complete message in response to the MN RRC reconfiguration message; Receiving a second MN RRC reconfiguration complete message transmitted from the UE in response to execution of the CPC or establishment of the execution condition; and Conditional sending a PSCell Change Notification message to the source Secondary Node (SN); program.
- RRC Radio Resource Control
- CPC inter-SN Conditional PSCell Change
- PSCell Primary SCG Cell
- MN Master Node
- S-SN Source Secondary Node
- UE User Equipment
- T-SN Target Secondary Node
- processor 1505 memory 1506 modules 1603 baseband processor 1604 application processor 1606 memory 1607 modules
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
(a)SN-initiated inter-SN CPCの要求を示す第1のノード間メッセージをS-SNから受信すること、ここで前記第1のノード間メッセージは、複数の候補PSCellsのそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
(b)inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをT-SNに送信すること;
(c)第3のノード間メッセージを前記T-SNから受信すること、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
(d)前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記S-SNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること;及び
(e)前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記S-SNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること。
(a)SN-initiated inter-SN CPCの要求を示す第1のノード間メッセージをS-SNから受信すること、ここで前記第1のノード間メッセージは、複数の候補PSCellsのそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信すること;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選ぶこと;及び
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること。
(a)inter-SN CPCの実行条件と候補PSCellの設定とを包含するMN RRC reconfigurationメッセージを前記UEに送信すること;
(b)前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信すること;
(c)前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信すること;及び
(d)前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをS-SNに送信すること。
図1は、本実施形態を含む複数の実施形態に係る無線通信ネットワークの構成例を示している。図1の例では、無線通信ネットワークは、RANノード1、RANノード2、RANノード4、及びUE3を含む。図1に示された各要素(ネットワーク機能)は、例えば、専用ハードウェア(dedicated hardware)上のネットワークエレメントとして、専用ハードウェア上で動作する(running)ソフトウェア・インスタンスとして、又はアプリケーション・プラットフォーム上にインスタンス化(instantiated)された仮想化機能として実装されることができる。
本実施形態に係る無線通信ネットワークの構成例は、図1及び図2に示された例と同様である。以下では、inter-SN CPCに関するMN1、S-SN2、及びT-SN4の動作について説明される。
本実施形態に係る無線通信ネットワークの構成例は、図1及び図2に示された例と同様である。以下では、inter-SN CPCに関するMN1、S-SN2、及びT-SN4の動作について説明される。
上述した実施形態の1又はそれ以上において、T-SN4はS-SN2から提案された1又はそれ以上の候補PSCellsからCPCのターゲットとなるPSCellの候補を選択する。これに代えて、T-SN4は当該提案された候補PSCellsとは異なる(つまり、それに含まれない)1又はそれ以上の別のセルをPSCellの候補として自ら選択してもよい。この場合、T-SN4は、S-SN2から提案され且つT-SN4によりアクセプトされた1又はそれ以上の候補PSCellsとT-SN4が自ら選択した候補PSCellsとを示す情報を、第3のノード間メッセージでMN1に送信してもよい。T-SN4は、さらに当該自ら選択した候補PSCellsの各々のためのPSCell設定(又はSCG設定)をMN1に送信する。MN1は、S-SN2から提案された1又はそれ以上の候補PSCellsの全てがアクセプトされた場合でも、T-SN4から1又はそれ以上の別の候補PSCells(つまり、T-SN4自ら選択したPSCellの候補セル)を通知された場合、S-SN2にこれに関する情報を送信する。S-SN2は、これに応答して、更新されたCPC実行条件情報アイテムをMN1に送信する。なお、更新されたCPC実行条件情報アイテムは、T-SN4が選択したPSCellの候補セルに対するCPC実行条件を少なくとも含む。これにより、T-SN4がCPCのPSCellの候補セルを柔軟に選択可能な場合にも、上述の実施形態を適用することができる。
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信し、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信し;
第3のノード間メッセージを前記ターゲットSNから受信し、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記ソースSNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信し;
前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記ソースSNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信するよう構成される、
RANノード。
(付記2)
前記1又はそれ以上の更新されたCPC実行条件情報アイテムは、前記1又はそれ以上のアクセプトされた候補PSCellsのみに関する1又はそれ以上のCPC実行条件を示す、
付記1に記載のRANノード。
(付記3)
前記追加シグナリングは、
前記1又はそれ以上のアクセプトされた候補PSCells又は前記ターゲットSNによってリジェクトされた1又はそれ以上の候補PSCellsを示す第4のノード間メッセージを前記ソースSNに送信すること、及び
前記1又はそれ以上の更新されたCPC実行条件情報アイテムを包含する第5のノード間メッセージを前記ソースSNから前記MNによって受信すること、
を含む、
付記1又は2に記載のRANノード。
(付記4)
前記1又はそれ以上のCPC実行条件情報アイテムは、前記MNに透過的な1又はそれ以上のコンテナを用いて前記第1のノード間メッセージによって送られる、
付記1~3のいずれか1項に記載のRANノード。
(付記5)
前記1又はそれ以上の更新されたCPC実行条件情報アイテムは、前記MNに透過的な1又はそれ以上のコンテナを用いて前記第5のノード間メッセージによって送られる、
付記3に記載のRANノード。
(付記6)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
第3のノード間メッセージを前記ターゲットSNから受信すること、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記ソースSNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること;及び
前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記ソースSNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること、
を備える方法。
(付記7)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるためのプログラムであって、前記方法は、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
第3のノード間メッセージを前記ターゲットSNから受信すること、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記ソースSNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること;及び
前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記ソースSNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること、
を備える、プログラム。
(付記8)
User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたターゲットSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
inter-SN Conditional PSCell Change(CPC)の要求を示し且つ複数の候補Primary SCG Cells(PSCells)の情報を包含する第2のノード間メッセージをMaster Node(MN)から受信し、
第3のノード間メッセージを前記MNに送信するよう構成され、
前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す、
RANノード。
(付記9)
User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたターゲットSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
inter-SN CPCの要求を示し且つ複数の候補Primary SCG Cells(PSCells)の情報を包含する第2のノード間メッセージをMaster Node(MN)から受信すること、及び
第3のノード間メッセージを前記MNに送信することを備え、
前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す、
方法。
(付記10)
User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたターゲットSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるためのプログラムであって、前記方法は、
inter-SN CPCの要求を示し且つ複数の候補Primary SCG Cells(PSCells)の情報を包含する第2のノード間メッセージをMaster Node(MN)から受信すること、及び
第3のノード間メッセージを前記MNに送信することを備え、
前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す、
プログラム。
(付記11)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信し、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信し;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信し;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選び;
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信するよう構成されている、
RANノード。
(付記12)
前記少なくとも1つのプロセッサは、
前記1又はそれ以上のアクセプトされた候補PSCells又は前記ターゲットSNによってリジェクトされた1又はそれ以上の候補PSCellsを示す第4のノード間メッセージを前記ソースSNに送信し、
前記第4のノード間メッセージの送信後に、第5のノード間メッセージを前記ソースSNから受信するよう構成され、
前記第1のMN RRC reconfigurationメッセージは、前記第5のノード間メッセージを前記MNが受信するよりも前に前記UEに送信される、
付記11に記載のRANノード。
(付記13)
前記第5のノード間メッセージは、前記1又はそれ以上のアクセプトされた候補PSCellsの少なくとも1つのための少なくとも1つの更新されたCPC実行条件情報アイテムを包含し、
前記少なくとも1つのプロセッサは、前記少なくとも1つの更新されたCPC実行条件情報アイテムを包含する第2のMN RRC reconfigurationメッセージを前記UEに送信するよう構成される、
付記12に記載のRANノード。
(付記14)
前記複数のセル識別情報アイテムは、非透過的な方法で前記MNに前記第1のノード間メッセージによって送られ、
前記複数のCPC実行条件情報アイテムの各々は、前記MNに透過的なコンテナを用いて前記第1のノード間メッセージによって送られる、
付記11~13のいずれか1項に記載のRANノード。
(付記15)
前記第1のノード間メッセージは、SN Change Requiredメッセージであり、
前記第2のノード間メッセージは、SN Addition Requestメッセージであり、
前記第3のノード間メッセージは、SN Addition Request Acknowledgeメッセージである、
付記11~14のいずれか1項に記載のRANノード。
(付記16)
前記第4のノード間メッセージは、SN Change Confirmメッセージである、
付記12に記載のRANノード。
(付記17)
前記第5のノード間メッセージは、SN Modification Requiredメッセージである、
付記16に記載のRANノード。
(付記18)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信すること;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選ぶこと;及び
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
を備える方法。
(付記19)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるためのプログラムであって、前記方法は、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信すること;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選ぶこと;及び
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
を備える、プログラム。
(付記20)
User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたソースSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをMaster Node(MN)に送信するよう構成され、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する、
RANノード。
(付記21)
前記第1のノード間メッセージは、ターゲットSNによってアクセプトされた1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを前記複数のCPC実行条件情報アイテムの中から選ぶことを前記MNに可能にする、
付記20に記載のRANノード。
(付記22)
前記複数のセル識別情報アイテムは、非透過的な方法で前記MNに前記第1のノード間メッセージによって送られ、
前記複数のCPC実行条件情報アイテムの各々は、前記MNに透過的なコンテナを用いて前記第1のノード間メッセージによって送られる、
付記20又は21に記載のRANノード。
(付記23)
前記第1のノード間メッセージは、SN Change Requiredメッセージである、
付記20~22のいずれか1項に記載のRANノード。
(付記24)
User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたソースSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
前記方法は、SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをMaster Node(MN)に送信することを備え、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する、
方法。
(付記25)
User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたソースSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるプログラムであって、
前記方法は、SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをMaster Node(MN)に送信することを備え、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する、
プログラム。
(付記26)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
inter-SN Conditional PSCell Change(CPC)の実行条件と候補Primary SCG Cell(PSCell)の設定とを包含するMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信し、
前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信し、
前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信し、
前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをソースSecondary Node(SN)に送信するよう構成される、
RANノード。
(付記27)
前記Conditional PSCell Change Notificationメッセージは、前記UEへのユーザーデータの提供を停止することを前記ソースSNに引き起こす、
付記26に記載のRANノード。
(付記28)
前記第2のMN RRC reconfiguration completeメッセージは、SN RRC reconfiguration completeメッセージを包含し、
前記少なくとも1つのプロセッサは、前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、前記SN RRC reconfiguration completeメッセージを、SN Reconfiguration Completeメッセージを介してターゲットSNにフォワードするよう構成される、
付記26又は27に記載のRANノード。
(付記29)
前記少なくとも1つのプロセッサは、
前記第2のMN RRC reconfiguration completeメッセージの受信より前に行われる前記inter-SN CPCを準備する手順の間に、SN Release Requestメッセージ又はSN Change Confirmメッセージを前記ソースSNに送信するよう構成される、
付記26~28のいずれか1項に記載のRANノード。
(付記30)
前記SN Release Requestメッセージ又は前記SN Change Confirmメッセージは、前記UEへのユーザーデータの提供を前記CPCの実行まで継続することを前記ソースSNに引き起こす、
付記29に記載のRANノード。
(付記31)
前記SN Release Requestメッセージ又は前記SN Change Confirmメッセージは、このメッセージがinter-SN CPCのためであることを示す情報を包含する、
付記29又は30に記載のRANノード。
(付記32)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
inter-SN Conditional PSCell Change(CPC)の実行条件と候補Primary SCG Cell(PSCell)の設定とを包含するMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信すること、
前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信すること、及び
前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをソースSecondary Node(SN)に送信するすること、
を備える方法。
(付記33)
User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるプログラムであって、前記方法は、
inter-SN Conditional PSCell Change(CPC)の実行条件と候補Primary SCG Cell(PSCell)の設定とを包含するMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信すること、
前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信すること、及び
前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをソースSecondary Node(SN)に送信するすること、
を備える、プログラム。
2 ソース・セカンダリノード(Source Secondary Node(S-SN))
3 User Equipment(UE)
4 ターゲット・セカンダリノード(Target Secondary Node(T-SN))
1504 プロセッサ
1505 メモリ
1506 モジュール(modules)
1603 ベースバンドプロセッサ
1604 アプリケーションプロセッサ
1606 メモリ
1607 モジュール(modules)
Claims (33)
- User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信し、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信し;
第3のノード間メッセージを前記ターゲットSNから受信し、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記ソースSNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信し;
前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記ソースSNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信するよう構成される、
RANノード。 - 前記1又はそれ以上の更新されたCPC実行条件情報アイテムは、前記1又はそれ以上のアクセプトされた候補PSCellsのみに関する1又はそれ以上のCPC実行条件を示す、
請求項1に記載のRANノード。 - 前記追加シグナリングは、
前記1又はそれ以上のアクセプトされた候補PSCells又は前記ターゲットSNによってリジェクトされた1又はそれ以上の候補PSCellsを示す第4のノード間メッセージを前記ソースSNに送信すること、及び
前記1又はそれ以上の更新されたCPC実行条件情報アイテムを包含する第5のノード間メッセージを前記ソースSNから前記MNによって受信すること、
を含む、
請求項1又は2に記載のRANノード。 - 前記1又はそれ以上のCPC実行条件情報アイテムは、前記MNに透過的な1又はそれ以上のコンテナを用いて前記第1のノード間メッセージによって送られる、
請求項1~3のいずれか1項に記載のRANノード。 - 前記1又はそれ以上の更新されたCPC実行条件情報アイテムは、前記MNに透過的な1又はそれ以上のコンテナを用いて前記第5のノード間メッセージによって送られる、
請求項3に記載のRANノード。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
第3のノード間メッセージを前記ターゲットSNから受信すること、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記ソースSNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること;及び
前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記ソースSNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること、
を備える方法。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるためのプログラムを格納した非一時的なコンピュータ可読媒体であって、前記方法は、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つに各々が関連付けられた複数のCPC実行条件を示す1又はそれ以上のCPC実行条件情報アイテムを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
第3のノード間メッセージを前記ターゲットSNから受信すること、ここで前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す;
前記複数の候補PSCellsの全てがアクセプトされたことを前記第3のノード間メッセージが示すなら、前記ソースSNとの追加シグナリングをスキップしつつ又は前記追加シグナリングの完了を待たずに、前記1又はそれ以上のCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること;及び
前記複数の候補PSCellsのサブセットのみがアクセプトされたことを前記第3のノード間メッセージが示すなら、1又はそれ以上の更新されたCPC実行条件情報アイテムを受信するために前記追加シグナリングを前記ソースSNと行い、前記1又はそれ以上の更新されたCPC実行条件情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN RRC reconfigurationメッセージを前記UEに送信すること、
を備える、非一時的なコンピュータ可読媒体。 - User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたターゲットSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
inter-SN Conditional PSCell Change(CPC)の要求を示し且つ複数の候補Primary SCG Cells(PSCells)の情報を包含する第2のノード間メッセージをMaster Node(MN)から受信し、
第3のノード間メッセージを前記MNに送信するよう構成され、
前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す、
RANノード。 - User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたターゲットSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
inter-SN CPCの要求を示し且つ複数の候補Primary SCG Cells(PSCells)の情報を包含する第2のノード間メッセージをMaster Node(MN)から受信すること、及び
第3のノード間メッセージを前記MNに送信することを備え、
前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す、
方法。 - User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたターゲットSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるためのプログラムを格納した非一時的なコンピュータ可読媒体であって、前記方法は、
inter-SN CPCの要求を示し且つ複数の候補Primary SCG Cells(PSCells)の情報を包含する第2のノード間メッセージをMaster Node(MN)から受信すること、及び
第3のノード間メッセージを前記MNに送信することを備え、
前記第3のノード間メッセージは、1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含し、前記第3のノード間メッセージは、前記複数の候補PSCellsの全てがアクセプトされたか否かを前記MNに示す、
非一時的なコンピュータ可読媒体。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信し、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信し;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信し;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選び;
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信するよう構成されている、
RANノード。 - 前記少なくとも1つのプロセッサは、
前記1又はそれ以上のアクセプトされた候補PSCells又は前記ターゲットSNによってリジェクトされた1又はそれ以上の候補PSCellsを示す第4のノード間メッセージを前記ソースSNに送信し、
前記第4のノード間メッセージの送信後に、第5のノード間メッセージを前記ソースSNから受信するよう構成され、
前記第1のMN RRC reconfigurationメッセージは、前記第5のノード間メッセージを前記MNが受信するよりも前に前記UEに送信される、
請求項11に記載のRANノード。 - 前記第5のノード間メッセージは、前記1又はそれ以上のアクセプトされた候補PSCellsの少なくとも1つのための少なくとも1つの更新されたCPC実行条件情報アイテムを包含し、
前記少なくとも1つのプロセッサは、前記少なくとも1つの更新されたCPC実行条件情報アイテムを包含する第2のMN RRC reconfigurationメッセージを前記UEに送信するよう構成される、
請求項12に記載のRANノード。 - 前記複数のセル識別情報アイテムは、非透過的な方法で前記MNに前記第1のノード間メッセージによって送られ、
前記複数のCPC実行条件情報アイテムの各々は、前記MNに透過的なコンテナを用いて前記第1のノード間メッセージによって送られる、
請求項11~13のいずれか1項に記載のRANノード。 - 前記第1のノード間メッセージは、SN Change Requiredメッセージであり、
前記第2のノード間メッセージは、SN Addition Requestメッセージであり、
前記第3のノード間メッセージは、SN Addition Request Acknowledgeメッセージである、
請求項11~14のいずれか1項に記載のRANノード。 - 前記第4のノード間メッセージは、SN Change Confirmメッセージである、
請求項12に記載のRANノード。 - 前記第5のノード間メッセージは、SN Modification Requiredメッセージである、
請求項16に記載のRANノード。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信すること;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選ぶこと;及び
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
を備える方法。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるためのプログラムを格納した非一時的なコンピュータ可読媒体であって、前記方法は、
SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをソースSecondary Node(SN)から受信すること、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する;
inter-SN CPCの要求を示し且つ前記複数の候補PSCellsの情報を包含する第2のノード間メッセージをターゲットSNに送信すること;
1又はそれ以上のアクセプトされた候補PSCellsのそれぞれ1つのPSCell設定を各々が示す1又はそれ以上のPSCell設定情報アイテムを包含する第3のノード間メッセージを前記ターゲットSNから受信すること;
前記複数のCPC実行条件情報アイテムから、前記1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを選ぶこと;及び
前記1又はそれ以上の選択されたCPC実行情報アイテムと前記1又はそれ以上のPSCell設定情報アイテムとを包含する第1のMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
を備える、非一時的なコンピュータ可読媒体。 - User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたソースSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをMaster Node(MN)に送信するよう構成され、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する、
RANノード。 - 前記第1のノード間メッセージは、ターゲットSNによってアクセプトされた1又はそれ以上のアクセプトされた候補PSCellsに対応する1又はそれ以上のCPC実行情報アイテムを前記複数のCPC実行条件情報アイテムの中から選ぶことを前記MNに可能にする、
請求項20に記載のRANノード。 - 前記複数のセル識別情報アイテムは、非透過的な方法で前記MNに前記第1のノード間メッセージによって送られ、
前記複数のCPC実行条件情報アイテムの各々は、前記MNに透過的なコンテナを用いて前記第1のノード間メッセージによって送られる、
請求項20又は21に記載のRANノード。 - 前記第1のノード間メッセージは、SN Change Requiredメッセージである、
請求項20~22のいずれか1項に記載のRANノード。 - User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたソースSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
前記方法は、SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをMaster Node(MN)に送信することを備え、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する、
方法。 - User Equipment(UE)のためのデュアルコネクティビティにおいてSecondary Cell Group(SCG)に関連付けられたソースSecondary Node(SN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるプログラムを格納した非一時的なコンピュータ可読媒体であって、
前記方法は、SN-initiated inter-SN Conditional PSCell Change(CPC)の要求を示す第1のノード間メッセージをMaster Node(MN)に送信することを備え、ここで前記第1のノード間メッセージは、複数の候補Primary SCG Cells(PSCells)のそれぞれ1つを各々が示す複数のセル識別情報アイテムと、各々が前記複数のセル識別情報アイテムのそれぞれ1つに関連付けられた複数のCPC実行条件情報アイテムとを包含する、
非一時的なコンピュータ可読媒体。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードであって、
少なくとも1つのメモリと、
前記少なくとも1つのメモリに結合された少なくとも1つのプロセッサと、
を備え、
前記少なくとも1つのプロセッサは、
inter-SN Conditional PSCell Change(CPC)の実行条件と候補Primary SCG Cell(PSCell)の設定とを包含するMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信し、
前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信し、
前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信し、
前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをソースSecondary Node(SN)に送信するよう構成される、
RANノード。 - 前記Conditional PSCell Change Notificationメッセージは、前記UEへのユーザーデータの提供を停止することを前記ソースSNに引き起こす、
請求項26に記載のRANノード。 - 前記第2のMN RRC reconfiguration completeメッセージは、SN RRC reconfiguration completeメッセージを包含し、
前記少なくとも1つのプロセッサは、前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、前記SN RRC reconfiguration completeメッセージを、SN Reconfiguration Completeメッセージを介してターゲットSNにフォワードするよう構成される、
請求項26又は27に記載のRANノード。 - 前記少なくとも1つのプロセッサは、
前記第2のMN RRC reconfiguration completeメッセージの受信より前に行われる前記inter-SN CPCを準備する手順の間に、SN Release Requestメッセージ又はSN Change Confirmメッセージを前記ソースSNに送信するよう構成される、
請求項26~28のいずれか1項に記載のRANノード。 - 前記SN Release Requestメッセージ又は前記SN Change Confirmメッセージは、前記UEへのユーザーデータの提供を前記CPCの実行まで継続することを前記ソースSNに引き起こす、
請求項29に記載のRANノード。 - 前記SN Release Requestメッセージ又は前記SN Change Confirmメッセージは、このメッセージがinter-SN CPCのためであることを示す情報を包含する、
請求項29又は30に記載のRANノード。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードにより行われる方法であって、
inter-SN Conditional PSCell Change(CPC)の実行条件と候補Primary SCG Cell(PSCell)の設定とを包含するMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信すること、
前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信すること、及び
前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをソースSecondary Node(SN)に送信するすること、
を備える方法。 - User Equipment(UE)のためのデュアルコネクティビティにおいてMaster Cell Group(MCG)に関連付けられたMaster Node(MN)として動作するよう構成された無線アクセスネットワーク(RAN)ノードのための方法をコンピュータに行わせるプログラムを格納した非一時的なコンピュータ可読媒体であって、前記方法は、
inter-SN Conditional PSCell Change(CPC)の実行条件と候補Primary SCG Cell(PSCell)の設定とを包含するMN Radio Resource Control (RRC) reconfigurationメッセージを前記UEに送信すること、
前記MN RRC reconfigurationメッセージへの応答である第1のMN RRC reconfiguration completeメッセージを前記UEから受信すること、
前記CPCの実行又は前記実行条件の成立に応じて前記UEから送信される第2のMN RRC reconfiguration completeメッセージを受信すること、及び
前記第2のMN RRC reconfiguration completeメッセージの受信に応答して、Conditional PSCell Change NotificationメッセージをソースSecondary Node(SN)に送信するすること、
を備える、非一時的なコンピュータ可読媒体。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023535145A JPWO2023286420A5 (ja) | 2022-04-27 | 無線アクセスネットワークノード、User Equipment、及びこれらの方法 | |
US18/577,333 US20240244493A1 (en) | 2021-07-14 | 2022-04-27 | Radio access network node and method therefor |
EP22841767.1A EP4373161A1 (en) | 2021-07-14 | 2022-04-27 | Wireless access network nodes and method for same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021116603 | 2021-07-14 | ||
JP2021-116603 | 2021-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023286420A1 true WO2023286420A1 (ja) | 2023-01-19 |
Family
ID=84919288
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/019162 WO2023286420A1 (ja) | 2021-07-14 | 2022-04-27 | 無線アクセスネットワークノード及びその方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20240244493A1 (ja) |
EP (1) | EP4373161A1 (ja) |
WO (1) | WO2023286420A1 (ja) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021116603A (ja) | 2020-01-27 | 2021-08-10 | 積水ハウス株式会社 | トイレ室構造 |
-
2022
- 2022-04-27 WO PCT/JP2022/019162 patent/WO2023286420A1/ja active Application Filing
- 2022-04-27 US US18/577,333 patent/US20240244493A1/en active Pending
- 2022-04-27 EP EP22841767.1A patent/EP4373161A1/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021116603A (ja) | 2020-01-27 | 2021-08-10 | 積水ハウス株式会社 | トイレ室構造 |
Non-Patent Citations (9)
Title |
---|
CATT: "TS 37.340 CR for CPA and inter-SN CPC", R2-2105062, 3GPP TSG-RAN WG2 MEETING #114-E, 19 May 2021 (2021-05-19) |
HUAWEI: "Support of Conditional PSCell Change and Addition", 3GPP DRAFT; R3-212995, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. E-meeting; 20210517 - 20210527, 5 June 2021 (2021-06-05), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052022912 * |
HUAWEI: "Support of Conditional PSCell Change and Addition", R3-212995, 3GPP TSG-RAN WG3 MEETING #112-E, 17 May 2021 (2021-05-17) |
HUAWEI: "TP to CPAC TS 37.340 BL CR) Consideration on conditional PSCell change/addition", R3-212833, 3GPP TSG-RAN WG3 MEETING #112-E, 17 May 2021 (2021-05-17) |
NOKIANOKIA SHANGHAI BELL: "CPAC BL CR to TS 36.423", R3-212994, 3GPP TSG-RAN WG3 MEETING #112-E, 17 May 2021 (2021-05-17) |
SAMSUNG: "Correction on the preparation of multiple PSCells in one CPAC procedure_38.423", 3GPP DRAFT; R3-212542, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. E-meeting; 20210517 - 20210527, 7 May 2021 (2021-05-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052002589 * |
SAMSUNG: "TP to TS 36.423, LTE NR DC enh2-Core) Adding CPAC Procedure", R3-212969, 3GPP TSG-RAN WG3 MEETING #112-E, 17 May 2021 (2021-05-17) |
SAMSUNG: "TP to TS 38.423, LTE NR DC enh2-Core) Adding CPAC Procedure", R3-212968, 3GPP TSG-RAN WG3 MEETING #112-E, 17 May 2021 (2021-05-17) |
VICE CHAIRMAN (NOKIA: "Report on LTE legacy, Mobility, DCCA, Multi-SIM and RAN slicing", R2-2106471, 3GPP TSG-RAN WG2 MEETING #114-E, 19 May 2021 (2021-05-19) |
Also Published As
Publication number | Publication date |
---|---|
US20240244493A1 (en) | 2024-07-18 |
EP4373161A1 (en) | 2024-05-22 |
JPWO2023286420A1 (ja) | 2023-01-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20200267608A1 (en) | Base station apparatus and method thereof | |
US9763163B2 (en) | Method and device for simultaneous communications with multiple base stations and related communication device | |
US20170019945A1 (en) | Dual Connectivity Re-Establishment | |
WO2020135850A1 (zh) | 通信方法和装置 | |
JP2015204631A (ja) | リンク故障を処理する方法及び関連した通信装置 | |
US10470069B2 (en) | Method of handling secondary node change in dual connectivity | |
US20230292185A1 (en) | Ei signalling for group handover | |
EP3028502A1 (en) | Method and apparatus to handle user equipment context for dual connectivity in enhanced small cell networks | |
WO2018171527A1 (en) | Data transmission in rrc inactive state | |
WO2021161621A1 (ja) | Ranノード、無線端末、及びこれらのための方法 | |
CN114365531A (zh) | 主节点、辅节点及其方法 | |
US20240224314A1 (en) | Method, network device and terminal device for semi-persistent scheduling | |
US11974219B2 (en) | Cell access procedure | |
WO2023286420A1 (ja) | 無線アクセスネットワークノード及びその方法 | |
WO2023286421A1 (ja) | 無線アクセスネットワークノード及びその方法 | |
WO2024014385A1 (ja) | 無線アクセスネットワークノード及びその方法 | |
JP7416201B2 (ja) | 無線アクセスネットワークノード、User Equipment、及びこれらの方法 | |
WO2023127273A1 (ja) | 無線アクセスネットワークノード、User Equipment、及びこれらの方法 | |
WO2023127272A1 (ja) | User Equipment、無線アクセスネットワークノード、及びこれらの方法 | |
WO2023286422A1 (ja) | 無線アクセスネットワークノード、User Equipment、及びこれらの方法 | |
WO2024029263A1 (ja) | 無線アクセスネットワークノード及びその方法 | |
WO2023127271A1 (ja) | 無線アクセスネットワークノード、User Equipment、及びこれらの方法 | |
WO2024024460A1 (ja) | 中央ユニット、分散ユニット、無線アクセスネットワークノード、ue、及びこれらの方法 | |
WO2020156887A1 (en) | New radio - dual connectivity enhancements for lte | |
US9900814B2 (en) | First network node, a second network node and methods relating to handover in a wireless communications network |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22841767 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023535145 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18577333 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022841767 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022841767 Country of ref document: EP Effective date: 20240214 |