WO2020090201A1 - 分散ユニット、中央ユニット、及びこれらの方法 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
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- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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Definitions
- the present disclosure relates to wireless communication systems, and more particularly to carrier aggregation enhancements.
- 3rd Generation Partnership Project (3GPP) Release 15 will introduce enhancements of Long Term Evolution (LTE) carrier aggregation (CA). These enhancements are intended for quick (immediate) setup and activation of a secondary cell (Secondary Cell (SCell)) (see Non-Patent Documents 1-4).
- LTE Long Term Evolution
- SCell Secondary Cell
- the dormant state When the SCell is in the dormant state, the wireless terminal (i.e., User Equipment (UE)) measures and reports the Channel State Information (CSI), but does not decode the Physical Downlink Control Channel (PDCCH). That is, the dormant SCell state (SCell in the dormant state) differs from the activated SCell state (SCell in the activated state) in that at least the UE does not monitor (monitor) or decode the PDCCH. Further, the dormant SCell state differs from the deactivated SCell state (SCell in the deactivated state) at least in that the UE measures and reports the CSI.
- UE User Equipment
- RRC Radio Resource Control
- the direct SCell state configuration is that when the SCell is added or handed over, the SCell is first activated (initially) or is in the dormant state (dormant) via RRC. To enable that.
- the eNB can specify the initial state of the SCell as activated or dormant when setting the SCell in RRC.
- the fifth-generation mobile communication system is also referred to as a 5G System or a Next Generation (Next Gen) System (NG System).
- the new Radio Access Technology (RAT) for 5G System is called New Radio, NR, 5G RAT, or NG RAT.
- the new Radio Access Network (RAN) for 5G System is called NextGen RAN, NG-RAN, or 5G-RAN.
- the new base station (NG-RAN node) in NG-RAN is called gNodeB or gNB.
- the new core network for the 5G System is called 5G Core Network (5GC) or NextGen Core (NG Core).
- the wireless terminal (User Equipment (UE)) connected to the 5G System is called 5G UE, NextGen UE (NG UE), or simply UE.
- 5G UE NextGen UE
- UE NextGen UE
- the main components of 5GC are Access and Mobility Management function (AMF), Session Management function (SMF), and User plane function (UPF).
- AMF Access and Mobility Management function
- SMF Session Management function
- UPF User plane function
- the AMF is, for example, connection management and mobility management of the UE, terminating the control plane (CP) of the NG-RAN (for example, exchanging CP information with the NG-RAN node), and terminating the NAS layer (for example, NAS with the UE). Message exchange).
- the SMF performs session management (Session Management (SM)) and terminates the session management part of the NAS message, for example.
- UPF is an anchor point of Intra-RAT and Inter-RAT mobility (e.g. handover), and manages QoS flow (e.g. DL reflective QoSmarking).
- LTE Long Term Evolution
- LTE-Advanced Pro LTE +, or enhanced LTE (eLTE).
- eLTE enhanced LTE
- an eLTE eNB that functions as an NG-RAN node is also called an ng-eNB.
- EPC Evolved Packet Core
- MME Mobility Management Entity
- S-GW Serving Gateway
- PDN Packet Data Network Gateway
- EPC enhanced EPC
- MME enhanced MME
- S-GW enhanced S-GW
- P-GW enhanced P-GW
- the OFDM numbering for Orthogonal Frequency Division Multiplexing (OFDM) systems includes, for example, subcarrier spacing (subcarrier spacing), system bandwidth (system bandwidth), transmission time interval length (Transmission Time Interval (TTI) length), and sub Includes frame length (subframeduration), cyclic prefix length (Cyclic prefix length), and symbol duration.
- 5G system provides various types of services with different service requirements, such as broadband communication (enhanced Mobile BroadBand: eMBB), highly reliable low latency communication (Ultra Reliable and Low Latency Communication: URLLC), and multi-connection M2M communication (massive).
- MachineType Communication: mMTC is included. The choice of Numerology depends on the service requirements.
- NR supports wider channel bandwidths (eg, 100s of MHz) than that of LTE.
- One channel band ie, BW Channel
- RF bandwidth radio frequency band
- the channel band is also called the system band.
- LTE supports channel bands up to 20 MHz
- 5G NR supports channel bandwidths up to 800 MHz, for example.
- 3GPP allows one or more bandwidth parts (BWPs) to be set in the carrier band (i.e., channel band or system band) of each NR component carrier.
- the bandwidth part is also called the carrier bandwidth part.
- Multiple BWPs may be used for frequency division (FDM) of different numerologies (e.g., subcarrier spacing (SCS)). For example, multiple BWPs may have different SCSs and different bandwidths.
- the channel band of one component carrier is divided into BWP # 1 and BWP # 2, and these two BWPs are used for FDM of different numerologies (e.g., different subcarriers spacing).
- the narrow band BWP # 1 is arranged in the channel band of one component carrier, and the narrower band BWP # 2 is further arranged in the BWP # 1 than the narrow band BWP # 1.
- BWP # 1 or BWP # 2 is activated for the UE, the UE can reduce power consumption by not performing reception and transmission outside the active BWP (but within the channel band).
- BWP bandwidth part
- PRB physical resource blocks
- the bandwidth of one BWP is at least as large as the synchronization signal (SS) / physical broadcast channel (PBCH) block bandwidth.
- BWP may or may not include SS / PBCH block (SSB).
- BWP configuration includes, for example, numerology, frequency location, and bandwidth (number of e.g., PRBs).
- PRB indexing is used for downlink (DL) BWP configuration at least in Radio Resource Control (RRC) connected state.
- RRC Radio Resource Control
- the offset from PRB0 to the lowest (the lowest) PRB of the SS / PBCH block accessed by the UE is set by higher layer signaling.
- the reference point “PRB0” is common to all UEs sharing the same wideband component carrier.
- One or more BWP configurations for each component carrier are signaled semi-statically to the UE.
- one or more DLBWPs eg, maximum 4 DLBWPs
- one or more UL BWPs eg, maximum 4 ULBWPs
- RRC Radio Resource Control
- Each of one or more BWPs (i.e., BWP set) set in the UE can be activated and deactivated.
- An activated BWP is called an active BWP. That is, the UE receives a signal on one or more activated DL BWPs of the set DL BWP set at an arbitrary time (at a given time). Similarly, the UE transmits a signal on one or more activated UL BWPs in the set UL BWP set at any time (at a given time). According to the current specifications, only one DL BWP and one UL BWP are activated at any time (at a given time).
- the NG-RAN consists of a set of gNBs connected to the 5GC via the NG interface. gNBs can be connected with an Xn interface.
- the gNB may be composed of a gNB Central Unit (gNB-CU) and one or more gNB Distributed Units (gNB-DUs).
- the gNB-CU and gNB-DU are connected via the F1 interface.
- the gNB-CU is a logical node that hosts gNB Radio Resource Control (RRC), Service Data Adaptation Protocol (SDAP), and Packet Data Convergence Protocol (PDCP) protocols (or gNB RRC and PDCP protocol).
- the gNB-DU is a logical node that hosts gNB's Radio Link Control (RLC), MAC, and PHY layers.
- RRC Radio Resource Control
- SDAP Service Data Adaptation Protocol
- PDCP Packet Data Convergence Protocol
- the gNB-DU is a logical node that hosts
- 3GPP is considering a CU-DU split architecture for LTE eNB. This aims to introduce eNB-CU and eNB-DU.
- the inventor examined the above-mentioned enhancement of carrier aggregation and found various problems. For example, when applying the directSCell state configuration to gNBCU-DU-split architecture or eNBCU-DU-split architecture, it is not clear which of CU and DU determines the directSCellState, and CU (or DU) is DU. It is not clear how (or CU) is notified of the direct SCell state.
- One of the objects to be achieved by the embodiments disclosed in the present specification is to provide a device, a method, and a program that contribute to an improvement for enabling direct SCell state configuration in a CU-DU split architecture. Is. It should be noted that this goal is only one of the goals that the embodiments disclosed herein seek to achieve. Other objects or problems and novel features will become apparent from the description of the present specification or the accompanying drawings.
- the central unit of the base station comprises at least one memory and at least one processor coupled to said at least one memory.
- the at least one processor is configured to send a first message requesting the addition of a secondary cell of carrier aggregation to a distribution unit of the base station.
- the first message includes a first information element indicating that the secondary cell should be initially activated or dormant.
- the distributed unit of the base station comprises at least one memory and at least one processor coupled to said at least one memory.
- the at least one processor is configured to receive a first message requesting addition of a secondary cell for carrier aggregation from a central unit of the base station.
- the first message includes a first information element indicating that the secondary cell should initially be activated or dormant.
- the method in the central unit of the base station comprises sending a first message to the distributed unit of the base station requesting the addition of a secondary cell for carrier aggregation.
- the first message includes a first information element indicating that the secondary cell should initially be activated or dormant.
- a method in a distributed unit of a base station comprises receiving a first message requesting the addition of a secondary cell of carrier aggregation from the central unit of the base station.
- the first message includes a first information element indicating that the secondary cell should initially be activated or dormant.
- the program includes a group of instructions (software code) for causing the computer to perform the method according to the third or fourth aspect when read by the computer.
- a plurality of embodiments described below can be implemented independently or can be implemented in an appropriate combination. These embodiments have novel features that are different from each other. Therefore, these plurality of embodiments contribute to solving different purposes or problems, and contribute to achieving different effects.
- 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 a gNB Central Unit (gNB-CU) 1, a gNB Distributed Unit (gNB-DU) 2, and a wireless terminal (ie, UE) 3.
- gNB-CU1 and gNB-DU2 are arrange
- the gNB-CU1 and each gNB-DU2 are connected by an interface 101.
- the interface 101 is an F1 interface.
- the gNB-CU1 may be connected to two or more gNB-DUs2.
- the gNB-CU1 may be a logical node that hosts gNB RRC, SDAP, and PDCP protocols (or gNB RRC and PDCP protocols).
- the gNB-DU2 may be a logical node that hosts the RNB, MAC, and PHY layers of gNB.
- the gNB-CU1 and gNB-DU2 provide the primary cell (PCell) 10 and the secondary cell (SCell) 20 to the UE3.
- UE3 communicates with gNB-CU1 and gNB-DU2 using the carrier aggregation (CA) between the primary cell (PCell) 10 and the secondary cell (SCell) 20.
- the UE 3 may be simultaneously connected to a plurality of base stations (i.e., Master gNB (MgNB) and Secondary gNB (SgNB)) for dual connectivity.
- MgNB Master gNB
- SgNB Secondary gNB
- gNB-CU1 and gNB-DU2 in FIG. 1 may be MgNB CU and DU, or may be SgNB CU and DU.
- PCell 1 may be the PCell and the SCell included in the Master Cell Group (MCG), or the Primary SCG Cell (PSCell) and the SCell included in the Secondary Cell Group (SCG).
- MCG Master Cell Group
- PSCell Primary SCG Cell
- SCG Secondary Cell Group
- PCell of MCG and PSCell of SCG for dual connectivity are also called Special Cell (SpCell).
- gNB-CU1 is ControlPlaneUnit (ie), gNB-CU-CP) 11 and one or more UserPlane (UP) Unit (ie, gNB-CU-UP). 12 may be included.
- the gNB-CU-CP 11 is connected to the gNB-CU-UP 12 via the control plane interface 201 (i.e., E1 interface).
- the gNB-CU-CP11 is connected to the gNB-DU2 via the control plane interface 202 (i.e., F1-C interface).
- the gNB-CU-UP 12 is connected to the gNB-DU 2 via the user plane interface 203 (i.e., F1-U interface).
- FIG. 3 shows an example of the operation of the gNB-CU1 and gNB-DU2 of this embodiment.
- the gNB-CU1 transmits a control message (i.e., F1Application Protocol (F1AP) message) requesting the addition of the SCell20 to the gNB-DU2.
- the control message may be a UE CONTEXT SETUP REQUEST message or a UE CONTEXT MODIFICATION REQUEST message.
- the control message includes an information element (information) element (IE) indicating that the SCell 20 should be initially activated (activated) or in a dormant state (dormant).
- IE information element
- the gNB-CU1 when requesting the gNB-DU2 to add the SCell 20, the gNB-CU1 indicates to the gNB-DU2 that the SCell 20 to be added should be initially activated or in the dormant state.
- the control message causes the gNB-DU2 to activate or suspend the SCell 20 after the addition without deactivating it. Such an operation enables direct SCell state configuration in gNBCU-DU split architecture.
- the information element indicating the initial state of the SCell 20 may be SCell State IE, for example.
- the information element may be included in SCell to Be Setup Item IEs included in the UE CONTEXT SETUP REQUEST message or the UE CONTEXT MODIFICATION REQUEST message.
- the gNB-CU1 may transmit the information element to the gNB-DU2 only when the initial state of the SCell 20 is the activated state or the dormant state.
- the F1AP message requesting the addition of the SCell 20 does not include the information element, the gNB-DU2 is not allowed to specify the initial state of the SCell 20, or the SCell 20 is initially allowed to be deactivated. (Consider) is also good.
- FIG. 4 shows an example of the format of the UE CONTEXT SETUP REQUEST message improved to include the information element (i.e., SCell State IE) indicating the initial state of the SCell 20.
- FIG. 5 shows an example of the operation of the gNB-CU1 of this embodiment.
- gNB-CU1 determines addition of SCell20 for UE3, and also determines the initial state (i.e., Activated, Dormant, or Deactivated) of SCell20 added.
- the gNB-CU1 requests the addition of the SCell 20 and transmits an F1AP message (e.g., UEUE CONTEXT SETUP REQUEST message or UE CONTEXT MODIFICATION REQUEST message) indicating the initial state of the SCell 20 to the gNB-DU2.
- the F1AP message may indicate that the initial state of the SCell 20 is the activated state or the dormant state. In other words, the F1AP message may indicate that the SCell 20 should not be initially deactivated.
- FIG. 6 shows an example of the operation of the gNB-DU2 of this embodiment.
- the gNB-DU2 receives from the gNB-CU1 a F1AP message requesting the addition of the SCell 20 and indicating the initial state (activated state or dormant state) of the SCell 20.
- the gNB-DU2 sets the SCell 20 in response to the reception of the message.
- gNB-DU2 activates or puts the SCell 20 after the addition into the inactive state without deactivating it.
- gNB-DU2 may send a response message to gNB-CU1.
- the response message may be an F1AP: UE CONTEXT SETUP RESPONSE message or an F1 AP: UE CONTEXT MODIFICATION RESPONSE message.
- the gNB-DU2 may include an information element indicating the initial state of the added SCell 20 in the response message.
- the information element may be sCellStateIE or CellGroupConfigIE.
- CellGroupConfigIE is included in DUtoCUCURRCInformationIE that is carried from gNB-DU2 to gNB-CU1 by the UECONTEXTSETUPRESPONSE (or UECONTEXTMODIFICATIONRESPONSE) message.
- the gNB-CU1 receives an F1AP message containing assistance information from the gNB-DU2, and based on the assistance information, the SCell 20 should be initially activated or dormant. May be determined. In other words, gNB-CU1 may determine that SCell 20 should not be initially deactivated. That is, the assistance information prompts the gNB-CU1 to determine whether the SCell 20 should be activated or in the dormant state.
- the F1AP message carrying the assistance information may be a UE CONTEXT MODIFICATION REQUIRED message.
- Assistance information may include, for example but not limited to, the following information.
- the assistance information may include information (e.g., cell load, radio resource, usage, or number of active UEs) regarding the load status in the cell that the UE 3 is using as a serving cell. Further or alternatively, the assistance information may include a usage status (e.g., cell usage, cell usage utility) indicating how the UE 3 uses each serving cell. Further or alternatively, the assistance information may include information on the QoS satisfaction degree of the UE 3 (e.g., QoS performance, QoS satisfaction, or gap to required / expected QoS). Further or alternatively, the assistance information may include information (e.g., expected / target data rate or throughput) regarding characteristics expected by the UE3.
- information e.g., cell load, radio resource, usage, or number of active UEs
- a usage status e.g., cell usage, cell usage utility
- the assistance information may include information on the QoS satisfaction degree of the UE 3 (e
- the configuration example of the wireless communication network according to this embodiment is the same as the examples shown in FIGS. 1 and 2.
- the present embodiment provides an example in which the gNB-DU2 determines the initial state of the SCell 20 to be added.
- FIG. 7 shows an example of the operation of the gNB-CU1 and gNB-DU2 of this embodiment.
- the gNB-CU1 transmits a control message (i.e., F1Application Protocol (F1AP) message) requesting the addition of the SCell 20 to the gNB-DU2.
- the control message may be a UE CONTEXT SETUP REQUEST message or a UE CONTEXT MODIFICATION REQUEST message.
- the gNB-DU2 adds the SCell 20 in response to receiving the message in step 701 and determines the initial state (i.e., Activated, Dormant, or Deactivated) of the SCell 20. For example, gNB-DU2 determines that the SCell 20 to be added is not activated but immediately activated or hibernated. And gNB-DU2 transmits the response message containing the information element which shows the initial state of SCell20 to gNB-CU1. The gNB-DU2 may transmit the information element to the gNB-CU1 only when the initial state of the SCell 20 is the activated state or the dormant state. In this case, when the message from gNB-DU2 does not include the information element, gNB-CU1 may consider that the initial state of SCell 20 is initially deactivated (consider).
- the initial state i.e., Activated, Dormant, or Deactivated
- the relevant information element may be, for example, sCellStateIE.
- the information element may be included in CellGroupConfig IE.
- CellGroupConfigIE is included in DUtoCUCURRCInformationIE that is carried from gNB-DU2 to gNB-CU1 by the UECONTEXTSETUPRESPONSE (or UECONTEXTMODIFICATIONRESPONSE) message.
- the gNB-DU2 When the gNB-DU2 operates a plurality of SCells 20, the gNB-DU2 sends an information element (eg, sCellState IE) indicating the initial state of the SCell 20 for each SCell 20 to the gNB-CU1 by including it in the response message. Good. That is, the information element indicating the initial state of the SCell 20 may be a sCellState IE list (sCellStateList IE).
- sCellStateList IE sCellStateList IE
- Fig. 7 enables direct SCell state configuration in gNBCU-DU split architecture.
- the gNB-CU1 may include assistance information in the message of step 701 to assist the gNB-DU2 in determining the initial state of the SCell 20.
- gNB-DU2 may consider the said assistance information in order to determine the initial state of SCell20 added.
- the assistance information may indicate whether or not the addition of the SCell 20 is urgent.
- the gNB-DU2 may set the SCell 20 such that the initial state of the SCell 20 is the activated state or the dormant state.
- the assistance information may indicate the purpose or necessity (e.g., urgent, load balancing, or normal) of the SCell 20. Further or alternatively, the assistance information may indicate an additional purpose (e.g., load balancing, or throughput (improvement)) of the SCell 20.
- the assistance information may include information on PDCP buffer of gNB-CU1 (e.g., PDCP buffer status, or PDCP buffer usage radio).
- the information may indicate the usage status (or load) of the PDCP buffer of gNB-CU1.
- the information may indicate that the usage status (or load) of the PDCP buffer of the gNB-CU 1 is high, so that additional SCell 20 needs to be added.
- FIG. 8 shows an example of the operation of the gNB-CU1 of the present embodiment.
- gNB-CU1 determines addition of SCell20 for UE3, and transmits the F1AP message which requests addition of SCell20 to gNB-DU2.
- the F1AP message may be, for example, a UE CONTEXT SETUP REQUEST message or a UE CONTEXT MODIFICATION REQUEST message.
- gNB-CU1 receives the F1AP message indicating the initial state of SCell 20 from gNB-DU2.
- the F1AP message may be, for example, a UE CONTEXT SETUP RESPONSE message or a UE CONTEXT MODIFICATION RESPONSE message.
- FIG. 9 shows an example of the operation of the gNB-DU2 of this embodiment.
- the gNB-DU2 receives the F1AP message requesting the addition of the SCell 20 from the gNB-CU1.
- the gNB-DU2 sets the SCell 20 in response to the reception of the message.
- gNB-DU2 determines the initial state of SCell20 after addition. For example, gNB-DU2 activates the SCell 20 after the addition without deactivating it or puts it in a dormant state.
- the gNB-DU2 transmits an F1AP message (e.g., UEUE CONTEXT SETUP RESPONSE message or UE CONTEXT MODIFICATION RESPONSE message) indicating the initial state of the SCell 20 to the gNB-CU1.
- F1AP message e.g., UEUE CONTEXT SETUP RESPONSE message or UE CONTEXT MODIFICATION RESPONSE message
- gNB-CU1 changes the state of SCell20 between an activated (activated) state, a dormant state, and a deactivated state (deactivated). Instruct or suggest to gNB-DU2 to do so. Such an operation enables the gNB-CU1 to control the current state of the SCell 20.
- FIG. 10 shows an example of the operation of the gNB-CU1 and gNB-DU2 of this embodiment.
- the gNB-CU1 transmits to the gNB-DU2 an F1AP message instructing or proposing to change the state of the SCell 20.
- the F1AP message may be, for example, a UE CONTEXT MODIFICATION REQUEST message.
- gNB-CU1 may include an information element for prompting gNB-DU2 to change the state of SCell 20 in the UE CONTEXT MODIFICATION REQUEST message.
- the information element may be SCell State IE.
- the information element may be included in SCelltoBeModifyItemIEs that is newly defined and included in the UE CONTEXT MODIFICATION REQUEST message.
- the gNB-CU1 uses both the information element indicating the removal (removal) of the SCell 20 and the information element indicating the setup of the SCell20 as one UE CONTEXT in order to prompt the gNB-DU2 to change the state of the SCell20. May be included in the MODIFICATION REQUEST message.
- the information element indicating the removal (remove) of the SCell 20 may be SCelltoBeRemovedItemIEs, while the information element indicating the setup of the SCell20 may be SCelltoBeSetupItemIEs.
- SCelltoBeSetupItemIEs may include an information element (e.g., SCellStateIE) for indicating a change in the state of SCell20.
- the gNB-CU1 may send a Cause indicating the purpose or background of the state change to the gNB-DU2 in order to prompt the gNB-DU2 to change the state of the SCell 20.
- the Cause may be, for example, information indicating that the UE 3 is in an overheated state (i.e. overheating) or information indicating that the UE 3 is for eliminating the overheating state.
- the gNB-CU1 may transmit the Cause to the gNB-DU2 together with, for example, an instruction or a proposal to put the SCell 20 in a dormant state or a deactivated state.
- gNB-CU1 determines to delete SCell20 from the setting for UE3 in response to receiving a report (eg, overheatingassistance information) regarding overheating from UE3, and an information element indicating the deletion of SCell20.
- the Cause may be transmitted to the gNB-DU2.
- gNB-DU2 may send information related to the activity of UE3 associated with SCell20 to gNB-CU1.
- the gNB-CU1 may transmit an F1AP message including an information element indicating that the activity of the UE3 may be monitored (or want to be monitored) to the gNB-DU2.
- the F1AP message may be a UE CONTEXT SETUP REQUEST message (see FIG. 11) or a UE CONTEXT MODIFICATION REQUEST message (see FIG. 12).
- the messages shown in FIGS. 11 and 12 include an Inactivity Monitoring Request IE indicating whether or not the activity of the UE 3 may be monitored (or whether or not monitoring is requested).
- the gNB-CU1 sets the value of "True” to InactivityMonitoringRequestIE, when permitting (or requesting) gNB-DU2 to monitor the activity of UE3.
- the gNB-DU2 may send the F1AP: INACTIVITY NOTIFICATION message to the gNB-CU1.
- the activity information is the communication status of the UE3 in the SCell 20 (or the status of the data radio bearer (DRB) of the UE3, or the data communication status associated with the logical channel identifier (LCID)). Indicates whether or not it is active.
- the activity information may be called non-activity information.
- Use of the UE activity based on the data communication status linked to the LCID is effective, for example, in the implementation in which DRB data is transmitted or received only in a specific serving cell. More specifically, in some implementations, when the UE 3 transmits uplink data of a certain DRB, the UE 3 transmits a specific serving cell (pre-permitted by RRC signaling of gNB (eg, gNB-CU1)). The uplink data can be transmitted only in (allowed Serving Cell). Similarly, UE3 can receive downlink data only in a specific serving cell according to the judgment of gNB (e.g., gNB-DU2).
- gNB e.g., gNB-DU2
- This is an indispensable technology for transmitting or receiving data of 1) and the additional logical channel (eg, LCID # 2) for Packet duplication in different serving cells.
- the technology can be used with or without packet duplication.
- gNB-DU2 monitors the activity of the LCID and notifies the information from gNB-DU2 to gNB-CU1 is effective for state management of SCell. Is.
- the gNB-CU1 may decide to change the state of the SCell 20 based on the received activity information. Specifically, when the activity information indicates that UE3 (or the DRB of UE3 or a logical channel) is inactive (Not Active), gNB-CU1 changes the state of SCell20 from activated to dormant or from activated to deactivated. You may decide to change to.
- FIG. 13 shows a specific example of the UEINACTIVITYNOTIFICATION message.
- SCellActivityListIE indicates the activity (SCellActivityIE) of the UE 30 for each SCell.
- the configuration example of the wireless communication network according to this embodiment is the same as the examples shown in FIGS. 1 and 2.
- gNB-DU2 changes the state of SCell20 between an activated state, a dormant state, and a deactivated state. To do.
- the gNB-DU2 may determine the state of the SCell 20 based on the assistance information from the gNB-CU1. Such an operation enables the gNB-DU2 to control the current state of the SCell 20.
- FIG. 14 shows an example of the operation of the gNB-CU1 and gNB-DU2 of this embodiment.
- the gNB-CU1 transmits to the gNB-DU2 an F1AP message including assistance information related to the change of the state of the SCell 20.
- the F1AP message may be, for example, a UE CONTEXT MODIFICATION REQUEST message.
- the gNB-CU1 may include the assistance information related to the change of the state of the SCell 20 in the UE CONTEXT MODIFICATION REQUEST message.
- the assistance information may be related to the load or state of the UE3.
- the assistance information may be Overheating Assistance IE.
- Overheating Assistance IE may be equivalent to or related to the information (e.g., overheating Assistance information) regarding the excessive heating problem (overheating problem) reported by RRC signaling from UE3 to gNB (e.g., gNB-CU), for example.
- Overheating Assistance IE may include information about recommended settings (e.g., reduced UECategory, reduced Max CCs, reduced Max MIMO layers, or reducedMaxMaxactive BWPs) regarding settings recommended for overheating problem
- the assistance information may be included in SCelltoBeModifyItemIEs that is newly defined and included in the UECONTEXTMODIFICATIONREQUEST message.
- the gNB-DU2 may decide to change the state of the SCell 20 based on the assist information. For example, the SCell 20 in the activated state may be determined to be changed to the dormant state or the deactivated state, and the UE 3 may be instructed to do so. Instead of this, it may decide to delete the SCell 20 and request or propose it to the gNB-CU1. Thereby, gNB-DU2 can perform the state management of SCell20 in consideration of the load or state of UE3.
- gNB-CU1 instructs or proposes to gNB-DU2 to activate two or more downlink BWPs among the plurality of BWPs set for SCell 20.
- the plurality of BWPs (ie, BWP set) set for the SCell 20 may be DL BWPs or UL BWPs.
- the gNB-DU2 may activate two or more downlink BWPs of the SCell 20 based on an instruction or a proposal from the gNB-CU1. Such an operation enables the gNB-CU1 to control the number of active BWPs of the SCell 20.
- FIG. 15 shows an example of the operation of the gNB-CU1 and gNB-DU2 of this embodiment.
- the gNB-CU1 transmits to the gNB-DU2 an F1AP message instructing or proposing to the gNB-DU2 to activate two or more downlink BWPs of the SCell 20.
- gNB-CU1 includes an information element indicating the number of activated BWPs in an F1AP message (eg, UEUECONTEXT SETUP REQUEST message or UECONTEXT MODIFICATION REQUEST message) requesting the addition of SCell20. Good.
- the gNB-CU1 may include an information element indicating the number of activated BWPs in an F1AP message (e.g., UEUECONTEXT MODIFICATION REQUEST message) requesting correction of UECONTEXT.
- an F1AP message e.g., UEUECONTEXT MODIFICATION REQUEST message
- FIG. 16 is a block diagram showing a configuration example of the gNB-CU1 according to the above embodiment.
- the configurations of gNB-CU-CP11 and gNB-CU-UP12 may be the same as that shown in FIG.
- the gNB-CU1 includes a network interface 1601, a processor 1602, and a memory 1603.
- the network interface 1601 is used to communicate with network nodes (e.g., gNB-DU2 and control pool (CP) node and user plane (UP) node in 5GC).
- the network interface 1601 may include a plurality of interfaces.
- the network interface 1601 may include, for example, an optical fiber interface for CU-DU communication and a network interface compliant with IEEE802.3 series.
- the processor 1602 performs digital baseband signal processing (data plane processing) and control plane processing for wireless communication.
- Processor 1602 may include multiple processors.
- the processor 1602 includes a modem processor (eg, Digital Signal Processor (DSP)) that performs digital baseband signal processing and a protocol stack processor (eg, Central Processing Unit (CPU)) or a Micro Processing Unit (CPU) that performs control plane processing. MPU)) may be included.
- DSP Digital Signal Processor
- MPU Micro Processing Unit
- the memory 1603 is composed of a combination of a volatile memory and a non-volatile memory.
- the volatile memory is, for example, Static Random Access Memory (SRAM), Dynamic RAM (DRAM), or a combination thereof.
- the non-volatile memory is a mask Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, hard disk drive, or any combination thereof.
- Memory 1603 may include storage located remotely from processor 1602. In this case, the processor 1602 may access the memory 1603 via the network interface 1601 or an I / O interface (not shown).
- the memory 1603 may store one or more software modules (computer programs) 1604 including an instruction group and data for performing processing by the gNB-CU 1 described in the above-described embodiments.
- the processor 1602 may be configured to perform the processing of the gNB-CU1 described in the above embodiments by reading the one or more software modules 1604 from the memory 1603 and executing them. Good.
- FIG. 17 is a block diagram showing a configuration example of the gNB-DU2 according to the above embodiment.
- the gNB-DU2 includes a Radio Frequency transceiver 1701, a network interface 1703, a processor 1704, and a memory 1705.
- the RF transceiver 1701 performs analog RF signal processing in order to communicate with NGUEs.
- the RF transceiver 1701 may include multiple transceivers.
- RF transceiver 1701 is coupled with antenna array 1702 and processor 1704.
- the RF transceiver 1701 receives the modulation symbol data from the processor 1704, generates a transmission RF signal, and supplies the transmission RF signal to the antenna array 1702.
- the RF transceiver 1701 also generates a baseband reception signal based on the reception RF signal received by the antenna array 1702, and supplies this to the processor 1704.
- the RF transceiver 1701 may include an analog beamformer circuit for beamforming.
- the analog beamformer circuit includes, for example, a plurality of phase shifters and a plurality of power amplifiers.
- the network interface 1703 is used to communicate with network nodes (e.g., gNB-CU1, gNB-CU-CP11, gNB-CU-UP12).
- the network interface 1703 may include multiple interfaces.
- the network interface 1703 may include, for example, at least one of an optical fiber interface for CU-DU communication and a network interface compliant with IEEE802.3 series.
- the processor 1704 performs digital baseband signal processing (data plane processing) and control plane processing for wireless communication.
- Processor 1704 may include multiple processors.
- the processor 1704 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.
- Processor 1704 may include a digital beamformer module for beamforming.
- the digital beamformer module may include a Multiple Input Multiple Output (MIMO) encoder and a precoder.
- MIMO Multiple Input Multiple Output
- the memory 1705 is composed of a combination of a volatile memory and a non-volatile memory. Volatile memory is, for example, SRAM or DRAM or a combination thereof.
- the non-volatile memory is MROM, EEPROM, flash memory, or hard disk drive, or any combination thereof.
- Memory 1705 may include storage located remotely from processor 1704. In this case, the processor 1704 may access the memory 1705 via the network interface 1703 or an I / O interface (not shown).
- the memory 1705 may store one or more software modules (computer programs) 1706 including a command group and data for performing the processing by the gNB-DU2 described in the above-described embodiments.
- the processor 1704 may be configured to perform the processing of the gNB-DU2 described in the above embodiments by reading the one or more software modules 1706 from the memory 1705 and executing them. Good.
- each of the processors included in the gNB-CU1 and the gNB-DU2 according to the above-described embodiment has a group of instructions for causing a computer to execute the algorithm described with reference to the drawings.
- This program can be stored using various types of non-transitory computer readable medium, and can be supplied to a computer.
- Non-transitory computer readable media include various types of tangible storage media.
- non-transitory computer-readable media are magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical disks), Compact Disc Read Only Memory (CD-ROM), CD- R, CD-R / W, semiconductor memory (for example, mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access Memory (RAM)) are included.
- the program may be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves.
- the transitory computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
- ⁇ Other embodiments> The signaling between gNB-CU1 and gNB-DU2 described in the above embodiment may be performed between gNB-CU-CP11 and gNB-DU2.
- LTE eNB connected to 5GC is also called ng-eNB (or eLTE eNB), and the function of ng-eNB is CU (ie, ng-eNB-CU) and DU (ie, ng-eNB) like gNB. -DU).
- ng-eNB or eLTE eNB
- DU ie, ng-eNB
- the same or similar signaling as the signaling in the F1 interface between the gNB-CU1 and the gNB-DU2 described in the above-described embodiment is the same as the interface (eg, W1 interface) between the ng-eNB-CU and the ng-eNB-DU. ) May be performed in.
- the first message includes assistance information indicating whether or not the addition of the secondary cell is urgent.
- the first message includes assistance information regarding an additional purpose of the secondary cell, The dispersion unit according to attachment 1.
- the central unit of the base station At least one memory, At least one processor coupled to the at least one memory; Equipped with The at least one processor is Sending a first message requesting the addition of a secondary cell for carrier aggregation to the distributed unit of the base station, Receiving a second message from the distribution unit indicating that the secondary cell is initially activated or hibernated, Configured as Central unit.
- the first message includes assistance information indicating whether the addition of the secondary cell is urgent.
- the central unit according to attachment 4.
- the first message includes assistance information regarding an additional purpose of the secondary cell, The central unit according to attachment 4.
- the central unit of the base station At least one memory, At least one processor coupled to the at least one memory; Equipped with The at least one processor is It is configured to send a first message instructing or proposing change of the state of the secondary cell of carrier aggregation or deletion of the secondary cell to the distribution unit of the base station, Central unit.
- the first message includes cause information indicating a purpose of changing or deleting the state of the secondary cell, The central unit described in appendix 7.
- the cause information indicates that the wireless terminal associated with the secondary cell is in an overheated state, or that the wireless terminal is for eliminating an overheated state of the wireless terminal,
- the at least one processor is configured to receive from the distribution unit activity information related to activity of wireless terminals associated with the secondary cell.
- the central unit according to any one of appendices 7 to 9.
- the activity information indicates activity of the wireless terminal in each of a plurality of secondary cells activated for the wireless terminal, The central unit according to attachment 10.
- the at least one processor is configured to determine a state change or deletion of the secondary cell based on the activity information, The central unit according to appendix 10 or 11.
- the at least one processor is configured to determine a state change or deletion of the secondary cell based on the assistance information, The dispersion unit according to attachment 14.
- the assistance information indicates the load or state of the wireless terminal associated with the secondary cell, The dispersion unit according to appendix 14 or 15.
- the central unit of the base station At least one memory, At least one processor coupled to the at least one memory; Equipped with The at least one processor is Configured to send assistance information related to changing or deleting the state of a secondary cell of carrier aggregation to a distribution unit of the base station, Central unit.
- the central unit of the base station At least one memory, At least one processor coupled to the at least one memory; Equipped with The at least one processor is Configured to send to the distributed unit of the base station a message instructing or proposing to activate more than one of a plurality of bandwidth parts (BWPs) configured for a secondary cell of carrier aggregation, Central unit.
- BWPs bandwidth parts
- BWPs bandwidth parts
- Appendix B1 The central unit of the base station, At least one memory, At least one processor coupled to the at least one memory; Equipped with The at least one processor is configured to send a first message requesting addition of a secondary cell of carrier aggregation to a distributed unit of the base station, The first message includes a first information element indicating that the secondary cell should initially be activated or dormant, Central unit.
- Appendix B2 The first information element prompts the distributed unit to activate or hibernate the secondary cell after the addition without deactivating it; The central unit described in appendix B1.
- the at least one processor is configured to receive a second message including assistance information from the distribution unit and determine based on the assistance information that the secondary cell should be activated or dormant. Will be The central unit according to appendix B1 or B2.
- the at least one processor further includes a third message for instructing or proposing to the distributed unit to change the state of the secondary cell between an activated state, a dormant state, and a deactivated state, the secondary cell. Configured to send to the distributed unit after the addition of The central unit according to any one of appendices B1 to B3.
- the at least one processor is further configured to receive activity information of wireless terminals associated with the secondary cell from the distribution unit and determine a change of state of the secondary cell based on the activity information.
- the first message further comprises a second information element instructing or suggesting to the distribution unit to activate more than one downlink BWPs of the plurality of downlink bandwidth parts (BWPs) of the secondary cell.
- the central unit according to any one of appendices B1 to B5.
- the at least one processor further comprises a fourth message instructing or proposing to the distribution unit to activate more than one downlink BWPs of the plurality of downlink bandwidth parts (BWPs) of the secondary cell, Configured to send to the distribution unit, The central unit according to any one of appendices B1 to B5.
- Appendix B8 A distributed unit of base stations, At least one memory, At least one processor coupled to the at least one memory; Equipped with The at least one processor is configured to receive a first message requesting addition of a secondary cell for carrier aggregation from a central unit of the base station, The first message includes a first information element indicating that the secondary cell should initially be activated or dormant, Distributed unit.
- the at least one processor is further configured to, in response to receiving the first information element, activate or hibernate the secondary cell after the addition without deactivating it.
- the at least one processor is configured to send a second message including assistance information to the central unit,
- the assistance information prompts the central unit to determine whether the secondary cell should be activated or dormant,
- the dispersion unit according to Appendix B8 or B9.
- the at least one processor further includes a third message for instructing or proposing to the distributed unit to change the state of the secondary cell between an activated state, a dormant state, and a deactivated state, the secondary cell. Is configured to receive from the central unit after the addition of The dispersion unit according to any one of appendices B8 to B10.
- the at least one processor is configured to change the state of the secondary cell according to the third message, The dispersion unit according to attachment B11.
- the first message further comprises a second information element instructing or suggesting to the distribution unit to activate more than one downlink BWPs of the plurality of downlink bandwidth parts (BWPs) of the secondary cell.
- the dispersion unit according to any one of appendices B8 to B12.
- the at least one processor further comprises a fourth message instructing or proposing to the distribution unit to activate more than one downlink BWPs of the plurality of downlink bandwidth parts (BWPs) of the secondary cell, Configured to receive from the central unit, The dispersion unit according to any one of appendices B8 to B13.
- Appendix B15 A method in a central unit of a base station, Comprising sending a first message requesting the addition of a secondary cell of carrier aggregation to the distributed unit of the base station, The first message includes a first information element indicating that the secondary cell should initially be activated or dormant, Method.
- Appendix B16 A method in a distributed unit of a base station, comprising: Receiving a first message from the central unit of the base station requesting the addition of a secondary cell of carrier aggregation, The first message includes a first information element indicating that the secondary cell should initially be activated or dormant, Method.
- a program for causing a computer to perform a method in a central unit of a base station comprises sending a first message requesting the addition of a secondary cell of carrier aggregation to a distributed unit of the base station,
- the first message includes a first information element indicating that the secondary cell should initially be activated or dormant, program.
- a program for causing a computer to perform a method in a distributed unit of a base station comprises receiving a first message from a central unit of the base station requesting the addition of a secondary cell for carrier aggregation,
- the first message includes a first information element indicating that the secondary cell should initially be activated or dormant, program.
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Abstract
Description
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、gNB Central Unit(gNB-CU)1、gNB Distributed Unit(gNB-DU)2、及び無線端末(i.e., UE)3を含む。gNB-CU1及びgNB-DU2は、Radio Access Network(RAN)に配置される。gNB-CU1及び各gNB-DU2の間はインタフェース101によって接続される。インタフェース101は、F1インタフェースである。gNB-CU1は、2以上のgNB-DUs2と接続されてもよい。gNB-CU1は、gNBのRRC、SDAP、及びPDCP protocols(又はgNBのRRC及びPDCP protocols)をホストする論理ノードであってもよい。gNB-DU2は、gNBのRLC、MAC、及びPHY layersをホストする論理ノードであってもよい。
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。本実施形態は、追加されるSCell20の初期状態をgNB-DU2が決定する例を提供する。
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。本実施形態では、SCell20がUE3のために追加された後に、gNB-CU1は、SCell20の状態を活性化(activated)状態、休止(dormant)状態、及び非活性化(deactivated)状態の間で変更するようにgNB-DU2に指示又は提案する。このような動作は、SCell20の現在の状態を制御することをgNB-CU1に可能にする。
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。本実施形態では、SCell20がUE3のために追加された後に、gNB-DU2は、SCell20の状態を活性化(activated)状態、休止(dormant)状態、及び非活性化(deactivated)状態の間で変更する。このとき、gNB-DU2は、gNB-CU1からのアシスタンス情報をもとにSCell20の状態を決定してもよい。このような動作は、SCell20の現在の状態を制御することをgNB-DU2に可能にする。
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。本実施形態では、gNB-CU1は、SCell20のために設定された複数のBWPsのうち2つ以上のダウンリンクBWPsを活性化するようgNB-DU2に指示又は提案する。SCell20のために設定された複数のBWPs(i.e., BWPセット)は、DL BWPsであってもよいしUL BWPsであってもよい。gNB-DU2は、gNB-CU1からの指示又は提案に基づいて、SCell20の2つ以上のダウンリンクBWPsを活性化してもよい。このような動作は、SCell20のactive BWPsの数を制御することをgNB-CU1に可能にする。
上述の実施形態で説明されたgNB-CU1とgNB-DU2の間のシグナリングは、gNB-CU-CP11とgNB-DU2の間で行われてもよい。
基地局の分散ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信し、
前記第1のメッセージに応答して、前記セカンダリセルが当初は活性化される又は休止状態とされること決定し、
前記セカンダリセルが当初は活性化される又は休止状態とされることを示す第2のメッセージを前記中央ユニットに送信する、
よう構成される、
分散ユニット。
前記第1のメッセージは、前記セカンダリセルの追加が緊急であるか否かを示すアシスタンス情報を含む、
付記1に記載の分散ユニット。
前記第1のメッセージは、前記セカンダリセルの追加の目的に関するアシスタンス情報を含む、
付記1に記載の分散ユニット。
基地局の中央ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信し、
前記セカンダリセルが当初は活性化される又は休止状態とされることを示す第2のメッセージを前記分散ユニットから受信する、
よう構成される、
中央ユニット。
前記第1のメッセージは、前記セカンダリセルの追加が緊急であるか否かを示すアシスタンス情報を含む、
付記4に記載の中央ユニット。
前記第1のメッセージは、前記セカンダリセルの追加の目的に関するアシスタンス情報を含む、
付記4に記載の中央ユニット。
基地局の中央ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルの状態の変更又は前記セカンダリセルの削除を指示又は提案する第1のメッセージを前記基地局の分散ユニットに送信するよう構成される、
中央ユニット。
前記第1のメッセージは、前記セカンダリセルの状態の変更又は削除の目的を示すcause情報を含む、
付記7に記載の中央ユニット。
前記cause情報は、前記セカンダリセルに関連付けられた無線端末が過熱した状態であること、又は前記無線端末の過熱状態を解消するためであることを示す、
付記8に記載の中央ユニット。
前記少なくとも1つのプロセッサは、前記セカンダリセルに関連付けられた無線端末のアクティビティに関連するアクティビティ情報を前記分散ユニットから受信するよう構成される、
付記7~9のいずれか1項に記載の中央ユニット。
前記アクティビティ情報は、前記無線端末のために活性化されている複数のセカンダリセルの各々での前記無線端末のアクティビティを示す、
付記10に記載の中央ユニット。
前記少なくとも1つのプロセッサは、前記アクティビティ情報に基づいて前記セカンダリセルの状態の変更又は削除を決定するよう構成される、
付記10又は11に記載の中央ユニット。
基地局の分散ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルの状態の変更又は前記セカンダリセルの削除を指示又は提案する第1のメッセージを前記基地局の中央ユニットから受信するよう構成される、
分散ユニット。
基地局の分散ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルの状態の変更又は削除に関連するアシスタンス情報を前記基地局の中央ユニットから受信するよう構成される、
分散ユニット。
前記少なくとも1つのプロセッサは、前記アシスタンス情報に基づいて前記セカンダリセルの状態の変更又は削除を決定するよう構成される、
付記14に記載の分散ユニット。
前記アシスタンス情報は、前記セカンダリセルに関連付けられた無線端末の負荷又は状態を示す、
付記14又は15に記載の分散ユニット。
基地局の中央ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルの状態の変更又は削除に関連するアシスタンス情報を前記基地局の分散ユニットに送信するよう構成される、
中央ユニット。
基地局の中央ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルのために設定された複数のbandwidth parts(BWPs)のうち2つ以上を活性化するよう指示又は提案するメッセージを前記基地局の分散ユニットに送信するよう構成される、
中央ユニット。
基地局の分散ユニットであって、
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、
キャリアアグリゲーションのセカンダリセルのために設定された複数のbandwidth parts(BWPs)のうち2つ以上を活性化するよう指示又は提案するメッセージを前記基地局の中央ユニットから受信するよう構成される、
分散ユニット。
基地局の中央ユニットであって、
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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信するよう構成され、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
中央ユニット。
前記第1の情報要素は、前記追加の後の前記セカンダリセルを、非活性化せずに、活性化する又は休止状態とするよう前記分散ユニットに促す、
付記B1に記載の中央ユニット。
前記少なくとも1つのプロセッサは、アシスタンス情報を含む第2のメッセージを前記分散ユニットから受信し、前記アシスタンス情報に基づいて前記セカンダリセルが活性化されるべき又は休止状態であるべきことを決定するよう構成される、
付記B1又はB2に記載の中央ユニット。
前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの状態を活性化状態、休止状態、及び非活性化状態の間で変更するよう前記分散ユニットに指示又は提案する第3のメッセージを、前記セカンダリセルの追加後に前記分散ユニットに送信するよう構成される、
付記B1~B3のいずれか1項に記載の中央ユニット。
前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルに関連付けられた無線端末のアクティビティ情報を前記分散ユニットから受信し、前記アクティビティ情報に基づいて前記セカンダリセルの状態の変更を決定するよう構成される、
付記B4に記載の中央ユニット。
前記第1のメッセージは、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第2の情報要素をさらに含む、
付記B1~B5のいずれか1項に記載の中央ユニット。
前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第4のメッセージを、前記分散ユニットに送信するよう構成される、
付記B1~B5のいずれか1項に記載の中央ユニット。
基地局の分散ユニットであって、
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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信するよう構成され、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
分散ユニット。
前記少なくとも1つのプロセッサは、さらに、前記第1の情報要素の受信に応答して、前記追加の後の前記セカンダリセルを、非活性化せずに、活性化する又は休止状態とするよう構成される、
付記B8に記載の分散ユニット。
前記少なくとも1つのプロセッサは、アシスタンス情報を含む第2のメッセージを前記中央ユニットに送信するよう構成され、
前記アシスタンス情報は、前記セカンダリセルが活性化されるべき又は休止状態であるべきことを決定するよう前記中央ユニットに促す、
付記B8又はB9に記載の分散ユニット。
前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの状態を活性化状態、休止状態、及び非活性化状態の間で変更するよう前記分散ユニットに指示又は提案する第3のメッセージを、前記セカンダリセルの追加後に前記中央ユニットから受信するよう構成される、
付記B8~B10のいずれか1項に記載の分散ユニット。
前記少なくとも1つのプロセッサは、前記第3のメッセージに従って、前記セカンダリセルの状態を変更するよう構成される、
付記B11に記載の分散ユニット。
前記第1のメッセージは、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第2の情報要素をさらに含む、
付記B8~B12のいずれか1項に記載の分散ユニット。
前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第4のメッセージを、前記中央ユニットから受信するよう構成される、
付記B8~B13のいずれか1項に記載の分散ユニット。
基地局の中央ユニットにおける方法であって、
キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
方法。
基地局の分散ユニットにおける方法であって、
キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
方法。
基地局の中央ユニットにおける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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
プログラム。
基地局の分散ユニットにおける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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
プログラム。
2 gNB-DU
3 UE
11 gNB-CU-CP
12 gNB-CU-UP
1602 プロセッサ
1603 メモリ
1604 モジュール(modules)
1704 プロセッサ
1705 メモリ
1706 モジュール(modules)
Claims (18)
- 基地局の中央ユニットであって、
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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信するよう構成され、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
中央ユニット。 - 前記第1の情報要素は、前記追加の後の前記セカンダリセルを、非活性化せずに、活性化する又は休止状態とするよう前記分散ユニットに促す、
請求項1に記載の中央ユニット。 - 前記少なくとも1つのプロセッサは、アシスタンス情報を含む第2のメッセージを前記分散ユニットから受信し、前記アシスタンス情報に基づいて前記セカンダリセルが活性化されるべき又は休止状態であるべきことを決定するよう構成される、
請求項1又は2に記載の中央ユニット。 - 前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの状態を活性化状態、休止状態、及び非活性化状態の間で変更するよう前記分散ユニットに指示又は提案する第3のメッセージを、前記セカンダリセルの追加後に前記分散ユニットに送信するよう構成される、
請求項1~3のいずれか1項に記載の中央ユニット。 - 前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルに関連付けられた無線端末のアクティビティ情報を前記分散ユニットから受信し、前記アクティビティ情報に基づいて前記セカンダリセルの状態の変更を決定するよう構成される、
請求項4に記載の中央ユニット。 - 前記第1のメッセージは、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第2の情報要素をさらに含む、
請求項1~5のいずれか1項に記載の中央ユニット。 - 前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第4のメッセージを、前記分散ユニットに送信するよう構成される、
請求項1~5のいずれか1項に記載の中央ユニット。 - 基地局の分散ユニットであって、
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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信するよう構成され、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
分散ユニット。 - 前記少なくとも1つのプロセッサは、さらに、前記第1の情報要素の受信に応答して、前記追加の後の前記セカンダリセルを、非活性化せずに、活性化する又は休止状態とするよう構成される、
請求項8に記載の分散ユニット。 - 前記少なくとも1つのプロセッサは、アシスタンス情報を含む第2のメッセージを前記中央ユニットに送信するよう構成され、
前記アシスタンス情報は、前記セカンダリセルが活性化されるべき又は休止状態であるべきことを決定するよう前記中央ユニットに促す、
請求項8又は9に記載の分散ユニット。 - 前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの状態を活性化状態、休止状態、及び非活性化状態の間で変更するよう前記分散ユニットに指示又は提案する第3のメッセージを、前記セカンダリセルの追加後に前記中央ユニットから受信するよう構成される、
請求項8~10のいずれか1項に記載の分散ユニット。 - 前記少なくとも1つのプロセッサは、前記第3のメッセージに従って、前記セカンダリセルの状態を変更するよう構成される、
請求項11に記載の分散ユニット。 - 前記第1のメッセージは、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第2の情報要素をさらに含む、
請求項8~12のいずれか1項に記載の分散ユニット。 - 前記少なくとも1つのプロセッサは、さらに、前記セカンダリセルの複数のダウンリンクbandwidth parts(BWPs)のうち2つ以上のダウンリンクBWPsを活性化するよう前記分散ユニットに指示又は提案する第4のメッセージを、前記中央ユニットから受信するよう構成される、
請求項8~13のいずれか1項に記載の分散ユニット。 - 基地局の中央ユニットにおける方法であって、
キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
方法。 - 基地局の分散ユニットにおける方法であって、
キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
方法。 - 基地局の中央ユニットにおける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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の分散ユニットに送信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
非一時的なコンピュータ可読媒体。 - 基地局の分散ユニットにおける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、キャリアアグリゲーションのセカンダリセルの追加を要求する第1のメッセージを前記基地局の中央ユニットから受信することを備え、
前記第1のメッセージは、前記セカンダリセルが当初は活性化されるべき又は休止状態であるべきことを示す第1の情報要素を含む、
非一時的なコンピュータ可読媒体。
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JP7363803B2 (ja) | 2023-10-18 |
CN113056947A (zh) | 2021-06-29 |
JPWO2020090201A1 (ja) | 2021-09-24 |
US20210410021A1 (en) | 2021-12-30 |
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