WO2023063342A1 - 端末装置、基地局装置および、方法 - Google Patents
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- H—ELECTRICITY
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Definitions
- the present invention relates to a terminal device, base station device and method.
- This application claims priority to Japanese Patent Application No. 2021-167968 filed in Japan on October 13, 2021, the content of which is incorporated herein.
- 3GPP 3rd Generation Partnership Project
- E-UTRA Evolved Universal Terrestrial Radio Access
- RAT radio access technology
- 3GPP 3GPP is still conducting technical studies and establishing standards for extension technologies for E-UTRA.
- E-UTRA is also called Long Term Evolution (LTE: registered trademark), and extended technologies are sometimes called LTE-Advanced (LTE-A) and LTE-Advanced Pro (LTE-A Pro).
- NR New Radio or NR Radio access
- RAT Radio Access Technology
- a dual connectivity also called multi-connectivity
- one or more base station devices and terminal devices communicate using a plurality of cell groups.
- a terminal device needs to monitor whether there is a message addressed to itself in each cell group.
- the terminal device In order to enable the terminal device to perform low-delay communication when a large volume of data communication occurs, the terminal device must always monitor a plurality of cell groups, and there has been a problem of consuming a lot of power. Therefore, studies have been started on techniques for performing or stopping monitoring of some cell groups at a low frequency (cell group deactivated technique).
- One aspect of the present invention has been made in view of the circumstances described above, and one object thereof is to provide a terminal device, a base station device, a method, and an integrated circuit capable of efficiently performing communication control.
- one aspect of the present invention takes the following measures. That is, one aspect of the present invention is a terminal device that communicates with a base station device, comprising a processing unit that communicates using MCG and SCG, and a receiving unit that receives signaling from the base station device, and the MCG includes at least a PCell, the SCG includes at least a PSCell, and the processing unit, from the base station apparatus, when receiving signaling notifying that the SCG is to be deactivated, deactivates the SCG, determining whether the signaling includes information indicating that the beam failure detection is to be performed in the inactive state of the SCG, and indicating that the signaling is to perform the beam failure detection in the inactive state of the SCG;
- the processing unit is a terminal device that sets BFI_COUNTER of the PSCell of the deactivated SCG to 0 when it is determined that the information is not included.
- Another aspect of the present invention is a base station apparatus that communicates with a terminal device, comprising: a processing unit that communicates with the terminal device; and a transmission unit that transmits signaling to the terminal device.
- the SCG to be transmitted includes at least a PSCell, and causes the terminal device to deactivate the SCG by transmitting signaling for notifying the terminal device to deactivate the SCG, and the signaling includes the SCG causing the terminal device to determine whether information indicating that beam failure detection is to be performed in the inactive state of the SCG is included, and the terminal device causes the signaling to detect the beam failure in the inactive state of the SCG
- the base station apparatus causes the terminal apparatus to set BFI_COUNTER of the PSCell of the deactivated SCG to 0 when it is determined that the information indicating the activation is not included.
- one aspect of the present invention is a method for a base station apparatus that communicates with a terminal device, wherein communication is performed with the terminal device, signaling is transmitted to the terminal device, and an SCG set in the terminal device is at least PSCell and causing the terminal device to deactivate the SCG by transmitting signaling for notifying the terminal device to deactivate the SCG, and causing the signaling to cause the beam to be deactivated in the SCG
- the terminal device determines whether or not information indicating that failure detection is performed is included, and the terminal device includes information indicating that the beam failure detection is performed in the inactive state of the SCG in the signaling. When it is determined that it is not included, the terminal device sets BFI_COUNTER of the PSCell of the deactivated SCG to 0.
- one aspect of the present invention is an integrated circuit implemented in a terminal device that communicates with a base station device, the integrated circuit having a function of communicating using MCG and SCG and a function of receiving signaling from the base station device.
- the MCG includes at least a PCell
- the SCG includes at least a PSCell
- the integrated circuit deactivates the SCG when receiving signaling to deactivate the SCG. and based on whether the signaling includes information indicating that beam failure detection is to be performed in the inactive state of the SCG, the integrated circuit determines whether the beam failure recovery procedure of the deactivated SCG is An integrated circuit that determines whether to consider it to be successfully completed.
- the terminal device, base station device, method, and integrated circuit can realize efficient communication control processing.
- FIG. 1 is a schematic diagram of a communication system according to the embodiment;
- FIG. FIG. 2 is a diagram of an example of the E-UTRA protocol configuration according to the present embodiment;
- FIG. 2 is a diagram of an example of the NR protocol configuration according to this embodiment; The figure which shows an example of the flow of the procedure for various settings in RRC which concerns on this embodiment.
- FIG. 2 is a block diagram showing the configuration of a terminal device according to the embodiment;
- FIG. 2 is a block diagram showing the configuration of a base station apparatus according to this embodiment;
- 1 is an example of ASN.1 description included in a message regarding reconfiguration of RRC connection in NR in this embodiment.
- 1 is an example of ASN.1 description included in a message regarding reconfiguration of RRC connection in E-UTRA in this embodiment.
- LTE (and LTE-A, LTE-A Pro) and NR may be defined as different Radio Access Technologies (RAT).
- RAT Radio Access Technologies
- NR may also be defined as a technology included in LTE.
- LTE may also be defined as a technology included in NR.
- LTE that can be connected by NR and Multi-Radio Dual Connectivity (MR-DC) may be distinguished from conventional LTE.
- MR-DC Multi-Radio Dual Connectivity
- LTE using 5GC for a core network Core Network: CN
- CN Core Network
- EPC EPC for a core network.
- conventional LTE may be LTE that does not implement the technology standardized after Release 15 of 3GPP. This embodiment may be applied to NR, LTE and other RATs.
- LTE Long Term Evolution
- NR Long Term Evolution
- E-UTRA in this embodiment may be replaced with the term LTE
- LTE may be replaced with the term E-UTRA.
- each node and entity the processing in each node and entity, etc. when the radio access technology is E-UTRA or NR will be described, but this embodiment is applicable to other radio access technologies. may be used.
- the name of each node or entity in this embodiment may be another name.
- FIG. 1 is a schematic diagram of a communication system according to this embodiment. Note that the functions of each node, radio access technology, core network, interface, etc. described using FIG. 1 are part of the functions closely related to the present embodiment, and may have other functions.
- E-UTRA100 may be a radio access technology.
- E-UTRA 100 may also be the air interface between UE 122 and eNB 102 .
- the air interface between UE 122 and eNB 102 may be called the Uu interface.
- the eNB (E-UTRAN Node B) 102 may be a base station device of the E-UTRA 100.
- the eNB 102 may have the E-UTRA protocol described below.
- the E-UTRA protocol may consist of an E-UTRA user plane (User Plane: UP) protocol described later and an E-UTRA control plane (Control Plane: CP) protocol described later.
- eNB 102 may terminate E-UTRA User Plane (UP) and E-UTRA Control Plane (CP) protocols to UE 122 .
- a radio access network composed of eNBs may be called E-UTRAN.
- the EPC (Evolved Packet Core) 104 may be a core network.
- Interface 112 is the interface between eNB 102 and EPC 104 and may be referred to as the S1 interface.
- Interface 112 may include a control plane interface through which control signals pass, and/or a user plane interface through which user data passes.
- the control plane interface of interface 112 may terminate at a Mobility Management Entity (MME; not shown) within EPC 104 .
- MME Mobility Management Entity
- S-GW serving gateway
- the control plane interface of interface 112 may be called the S1-MME interface.
- the user plane interface of interface 112 may be called the S1-U interface.
- one or more eNBs 102 may be connected to the EPC 104 via the interface 112. Interfaces may exist between multiple eNBs 102 that connect to the EPC 104 (not shown). An interface between multiple eNBs 102 connected to an EPC 104 may be called an X2 interface.
- NR106 may be a radio access technology.
- NR 106 may also be the air interface between UE 122 and gNB 108 .
- the air interface between UE 122 and gNB 108 may be called the Uu interface.
- a gNB (g Node B) 108 may be a base station device of NR 106 .
- gNB 108 may have the NR protocol described below.
- the NR protocol may consist of an NR user plane (User Plane: UP) protocol, which will be described later, and an NR control plane (Control Plane: CP) protocol, which will be described later.
- gNB 108 may terminate NR User Plane (UP) and NR Control Plane (CP) protocols to UE 122 .
- UP NR user plane
- CP NR Control Plane
- 5GC110 may be a core network.
- Interface 116 is the interface between gNB 108 and 5GC 110 and may be referred to as the NG interface.
- Interface 116 may include a control plane interface through which control signals pass, and/or a user plane interface through which user data passes.
- the control plane interface of interface 116 may terminate at the Access and Mobility Management Function (AMF: not shown) within 5GC 110 .
- the user plane interface of interface 116 may terminate at a User Plane Function (UPF: not shown) within 5GC 110 .
- the control plane interface of interface 116 may be referred to as the NG-C interface.
- the user plane interface of interface 116 may be called the NG-U interface.
- one or more gNBs 108 may be connected to the 5GC 110 via the interface 116. There may be interfaces between gNBs 108 that connect to the 5GC 110 (not shown). An interface between multiple gNBs 108 connected to a 5GC 110 may be called an Xn interface.
- the eNB102 may have the function of connecting to the 5GC110.
- the eNB 102 with the function of connecting to the 5GC 110 may be called ng-eNB.
- Interface 114 is the interface between eNB 102 and 5GC 110 and may be called the NG interface.
- Interface 114 may include a control plane interface through which control signals pass, and/or a user plane interface through which user data passes.
- the control plane interface of interface 114 may terminate at the AMF in 5GC 110 .
- the user plane interface of interface 114 may terminate at UPF in 5GC 110 .
- the control plane interface of interface 114 may be referred to as the NG-C interface.
- the user plane interface of interface 114 may be called the NG-U interface.
- a radio access network composed of ng-eNBs or gNBs may be referred to as NG-RAN.
- NG-RAN, E-UTRAN, etc. may simply be referred to as networks.
- the network may include eNBs, ng-eNBs, gNBs, and the like.
- one or more eNBs 102 may be connected to the 5GC 110 via the interface 114. There may be interfaces between multiple eNBs 102 that connect to the 5GC 110 (not shown). An interface between multiple eNBs 102 connected to a 5GC 110 may be called an Xn interface. Also, eNB 102 connected to 5GC 110 and gNB 108 connected to 5GC 110 may be connected via interface 120 . The interface 120 between the eNB 102 connected to the 5GC 110 and the gNB 108 connected to the 5GC 110 may be referred to as the Xn interface.
- gNB108 may have the ability to connect to EPC104.
- a gNB 108 with the ability to connect to an EPC 104 may be called an en-gNB.
- Interface 118 is the interface between gNB 108 and EPC 104 and may be referred to as the S1 interface.
- Interface 118 may include a user plane interface through which user data passes.
- the user plane interface of interface 118 may terminate at an S-GW (not shown) within EPC 104 .
- the user plane interface of interface 118 may be called the S1-U interface.
- the eNB 102 connected to the EPC 104 and the gNB 108 connected to the EPC 104 may be connected via an interface 120 .
- the interface 120 between the eNB 102 that connects to the EPC 104 and the gNB 108 that connects to the EPC 104 may be referred to as the X2 interface.
- the interface 124 is the interface between the EPC 104 and the 5GC 110, and may be an interface through CP only, UP only, or both CP and UP. Also, some or all of interfaces 114, 116, 118, 120, 124, etc. may not be present depending on the communication system provided by the carrier.
- the UE 122 may be a terminal device capable of receiving broadcast information and paging messages transmitted from the eNB 102 and/or gNB 108. Also, UE 122 may be a terminal device capable of wireless connection with eNB 102 and/or gNB 108 . Also, the UE 122 may be a terminal device capable of establishing a wireless connection with the eNB 102 and a wireless connection with the gNB 108 at the same time. UE 122 may have an E-UTRA protocol and/or an NR protocol. Note that the wireless connection may be a Radio Resource Control (RRC) connection.
- RRC Radio Resource Control
- radio connection may be established by establishing a radio bearer (RB) between UE122 and eNB102 and/or gNB108.
- a radio bearer used for the CP may be called a signaling radio bearer (SRB).
- a radio bearer used for UP may also be called a data radio bearer (DRB Data Radio Bearer).
- Each radio bearer may be assigned a radio bearer identity (ID).
- the SRB radio bearer identifier may be called an SRB identity (SRB ID).
- a DRB radio bearer identifier may be called a DRB identity (DRB ID).
- the UE 122 may be a terminal device capable of connecting with the EPC 104 and/or the 5GC 110 via the eNB 102 and/or gNB 108.
- EPC 104 When the connection destination core network of eNB 102 and/or gNB 108 with which UE 122 communicates is EPC 104, each DRB established between UE 122 and eNB 102 and/or gNB 108 further passes through EPC 104.
- EPC 104 Evolved Packet System
- Each EPS bearer may be identified by an EPS bearer identifier (Identity, or ID). Also, the same QoS may be guaranteed for data such as IP packets and Ethernet (registered trademark) frames passing through the same EPS bearer.
- each DRB established between UE122 and eNB102 and/or gNB108 is further established within 5GC110.
- Each DRB may be mapped to one or more QoS flows, or may not be mapped to any QoS flows.
- Each PDU session may be identified with a PDU session identifier (Identity, Identifier, or ID).
- Each QoS flow may also be identified by a QoS flow identifier (Identity, Identifier, or ID).
- the same QoS may be guaranteed for data such as IP packets and Ethernet frames passing through the same QoS flow.
- the EPC 104 may not have PDU sessions and/or QoS flows. Also, 5GC110 does not need to have an EPS bearer. When UE 122 is connected to EPC 104, UE 122 has information of EPS bearers, but may not have information within PDU sessions and/or QoS flows. Also, when the UE 122 is connected to the 5GC 110, the UE 122 may have information in PDU sessions and/or QoS flows, but not EPS bearer information.
- eNB 102 and/or gNB 108 are also simply referred to as base station apparatuses, and UE 122 is simply referred to as terminal apparatus or UE.
- FIG. 2 is a diagram of an example of the E-UTRA protocol architecture according to this embodiment.
- FIG. 3 is a diagram of an example of the NR protocol configuration according to this embodiment. Note that the functions of each protocol described using FIG. 2 and/or FIG. 3 are part of the functions closely related to this embodiment, and may have other functions.
- the uplink (UL) may be a link from a terminal device to a base station device.
- the downlink (DL) may be a link from the base station apparatus to the terminal apparatus.
- FIG. 2(A) is a diagram of the E-UTRA User Plane (UP) protocol stack.
- the E-UTRAN UP protocol may be the protocol between UE 122 and eNB 102, as shown in FIG. 2(A). That is, the E-UTRANUP protocol may be a protocol that terminates at the eNB 102 on the network side.
- the E-UTRA user plane protocol stack consists of a PHY (Physical layer) 200 that is a radio physical layer (radio physical layer), a MAC (Medium) that is a medium access control layer (medium access control layer). Access Control) 202, RLC (Radio Link Control) 204 as a radio link control layer (radio link control layer), and PDCP (Packet Data Convergence Protocol) 206 as a packet data convergence protocol layer.
- PHY Physical layer
- MAC Medium access control layer
- Access Control 202
- RLC Radio Link Control
- PDCP Packet Data Convergence Protocol
- 206 Packet
- FIG. 3(A) is a diagram of the NR user plane (UP) protocol stack.
- the NRUP protocol may be the protocol between UE 122 and gNB 108, as shown in FIG. 3(A). That is, the NR UP protocol may be a protocol that terminates at the gNB 108 on the network side.
- the E-UTRA user plane protocol stack consists of PHY 300, which is a radio physical layer, MAC 302, which is a medium access control layer, RLC 304, which is a radio link control layer, and PDCP 306, which is a packet data convergence protocol layer.
- SDAP Service Data Adaptation Protocol
- FIG. 2(B) is a diagram of the E-UTRA control plane (CP) protocol configuration.
- RRC Radio Resource Control
- NAS Non Access Stratum
- NAS Non Access Stratum
- non-AS Access Stratum
- Fig. 3(B) is a diagram of the NR control plane (CP) protocol configuration.
- RRC 308 which is a radio resource control layer, may be a protocol between UE 122 and gNB 108. That is, RRC 308 may be a protocol that terminates at gNB 108 on the network side.
- the non-AS layer NAS 312 may be the protocol between the UE 122 and AMF. That is, the NAS 312 may be a protocol that terminates with AMF on the network side.
- the AS (Access Stratum) layer may be a layer that terminates between UE 122 and eNB 102 and/or gNB 108. That is, the AS layer is a layer including part or all of PHY200, MAC202, RLC204, PDCP206 and RRC208 and/or a layer including part or all of PHY300, MAC302, RLC304, PDCP306, SDAP310 and RRC308. you can
- the E-UTRA protocol and the NR protocol are not distinguished, and PHY (PHY layer), MAC (MAC layer), RLC (RLC layer), PDCP (PDCP layer), RRC (RRC layer) , the term NAS (NAS layer) may be used.
- PHY (PHY layer), MAC (MAC layer), RLC (RLC layer), PDCP (PDCP layer), RRC (RRC layer), and NAS (NAS layer) are the PHY (PHY layer) of the E-UTRA protocol.
- SDAP may be the SDAP (SDAP layer) of the NR protocol.
- PHY 200, MAC 202, RLC 204, PDCP 206, and RRC 208 are respectively defined as E-UTRA PHY or LTE PHY, E-UTRA MAC or They are also called MAC for LTE, RLC for E-UTRA or RLC for LTE, PDCP for E-UTRA or PDCP for LTE, and RRC for E-UTRA or RRC for LTE.
- PHY200, MAC202, RLC204, PDCP206 and RRC208 respectively E-UTRA PHY or LTE PHY, E-UTRA MAC or LTE MAC, E-UTRA RLC or LTE RLC, E-UTRA PDCP or LTE PDCP and E-UTRA It may also be described as RRC or LTE RRC.
- PHY 300, MAC 302, RLC 304, PDCP 306, and RRC 308 are called PHY for NR, MAC for NR, RLC for NR, RLC for NR, and RRC for NR, respectively. There is also a thing.
- PHY 200, MAC 302, RLC 304, PDCP 306, and RRC 308 may also be described as NR PHY, NR MAC, NR RLC, NR PDCP, NR RRC, etc., respectively.
- An entity that has some or all of the functionality of the MAC layer may be called a MAC entity.
- An entity that has some or all of the functionality of the RLC layer may be called an RLC entity.
- An entity that has some or all of the functions of the PDCP layer may be called a PDCP entity.
- An entity that has some or all of the functionality of the SDAP layer may be called an SDAP entity.
- An entity that has some or all of the functionality of the RRC layer may be called an RRC entity.
- the MAC entity, RLC entity, PDCP entity, SDAP entity, and RRC entity may be replaced with MAC, RLC, PDCP, SDAP, and RRC, respectively.
- the data provided from MAC, RLC, PDCP, SDAP to the lower layer and/or the data provided from the lower layer to MAC, RLC, PDCP, SDAP shall be MAC PDU (Protocol Data Unit), RLC respectively. You may call them PDUs, PDCP PDUs, and SDAP PDUs.
- MAC SDU Service Data Unit
- RLC SDU Service Data Unit
- RLC SDU RLC SDU for data provided from upper layers to MAC, RLC, PDCP, and SDAP and/or data provided from MAC, RLC, PDCP, and SDAP to upper layers, respectively , PDCP SDU, and SDAP SDU.
- a segmented RLC SDU may also be called an RLC SDU segment.
- the PHY of the terminal device may have a function of receiving data transmitted from the PHY of the base station device via a downlink (DL) physical channel.
- the PHY of the terminal device may have a function of transmitting data to the PHY of the base station device via an uplink (UL) physical channel.
- a PHY may be connected to a high-level MAC via a Transport Channel.
- the PHY may pass data to the MAC over transport channels.
- the PHY may also be provided with data from the MAC over the transport channel.
- RNTI Radio Network Temporary Identifier
- Physical channels used for wireless communication between the terminal apparatus and the base station apparatus may include the following physical channels.
- PBCH Physical Broadcast CHannel
- PDCCH Physical Downlink Control CHannel
- PDSCH Physical Downlink Shared CHannel
- PUCCH Physical Uplink Control CHannel
- PUSCH Physical Uplink Shared CHannel
- PRACH Physical Random Access CHannel
- the PBCH may be used to broadcast system information required by terminal equipment.
- the PBCH may be used to report the time index (SSB-Index) within the period of the synchronization signal block (SSB).
- SSB-Index time index within the period of the synchronization signal block
- the PDCCH may be used to transmit (or carry) downlink control information (DCI) in downlink radio communication (radio communication from the base station device to the terminal device).
- DCI downlink control information
- one or more DCIs (which may also be referred to as DCI formats) may be defined for transmission of downlink control information. That is, a field for downlink control information may be defined as DCI and mapped to information bits.
- a PDCCH may be sent in a PDCCH candidate.
- a terminal may monitor a set of PDCCH candidates in a serving cell. Monitoring a set of PDCCH candidates may mean attempting to decode the PDCCH according to a certain DCI format.
- the DCI format may be used for PUSCH scheduling in the serving cell. PUSCH may be used for transmission of user data, transmission of RRC messages to be described later, and the like.
- the PUCCH may be used to transmit uplink control information (UCI) in uplink radio communication (radio communication from a terminal device to a base station device).
- the uplink control information may include channel state information (CSI: Channel State Information) used to indicate the state of the downlink channel.
- the uplink control information may include a scheduling request (SR: Scheduling Request) used to request UL-SCH (UL-SCH: Uplink Shared CHannel) resources.
- SR Scheduling Request
- UL-SCH Uplink Shared CHannel
- the uplink control information may include HARQ-ACK (Hybrid Automatic Repeat reQuest ACKnowledgement).
- the PDSCH may be used to transmit downlink data (DL-SCH: Downlink Shared CHannel) from the MAC layer.
- PDSCH may also be used for transmission of system information (SI: System Information), random access response (RAR: Random Access Response), etc. in the case of downlink.
- SI System Information
- RAR Random Access Response
- PUSCH may be used to transmit HARQ-ACK and/or CSI together with uplink data (UL-SCH: Uplink Shared CHannel) or uplink data from the MAC layer.
- PUSCH may also be used to transmit CSI only, or HARQ-ACK and CSI only. That is, PUSCH may be used to transmit UCI only.
- PDSCH or PUSCH may also be used to transmit RRC signaling (also referred to as RRC messages) and MAC CE.
- RRC signaling transmitted from the base station apparatus may be signaling common to multiple terminal apparatuses within the cell.
- the RRC signaling transmitted from the base station apparatus may be signaling dedicated to a certain terminal apparatus (also referred to as dedicated signaling). That is, terminal device-specific (UE-specific) information may be transmitted using signaling dedicated to a certain terminal device.
- PUSCH may also be used to transmit UE Capability in the uplink.
- the PRACH may be used to transmit random access preambles.
- PRACH is used to indicate initial connection establishment procedures, handover procedures, connection re-establishment procedures, synchronization (timing adjustments) for uplink transmissions, and requests for UL-SCH resources.
- a MAC may be referred to as a MAC sublayer.
- a MAC may have the capability to map various logical channels (Logical Channels) to corresponding transport channels.
- a logical channel may be identified by a logical channel identifier (Logical Channel Identity or Logical Channel ID).
- a MAC may be connected to an upper RLC via a logical channel (logical channel).
- Logical channels may be divided into control channels for transmitting control information and traffic channels for transmitting user information according to the type of information to be transmitted.
- Logical channels may also be divided into uplink logical channels and downlink logical channels.
- the MAC may have the ability to multiplex MAC SDUs belonging to one or more different logical channels and provide them to the PHY.
- the MAC may also have the function of demultiplexing the MAC PDUs provided by the PHY and providing them to upper layers via the logical channel to which each MAC SDU belongs. Also, the MAC may have a function of performing error correction through HARQ (Hybrid Automatic Repeat reQuest). The MAC may also have a Scheduling Report (SR) function that reports scheduling information. The MAC may have a function of performing priority processing between terminal devices using dynamic scheduling. Also, the MAC may have a function of performing priority processing between logical channels within one terminal device. The MAC may have a function of prioritizing overlapping resources within one terminal device.
- the E-UTRA MAC may have the capability to identify MultimediaBroadcast Multicast Services (MBMS).
- MBMS MultimediaBroadcast Multicast Services
- the NR MAC may also have a function of identifying Multicast/Broadcast Service (MBS).
- MMS Multicast/Broadcast Service
- a MAC may have the ability to select a transport format.
- MAC has a function of performing discontinuous reception (DRX) and / or discontinuous transmission (DTX: discontinuous transmission), a function of executing random access (RA) procedure, notifying information of transmittable power, power It may have a headroom report (Power Headroom Report: PHR) function, a buffer status report (BSR) function that notifies the amount of data in the transmission buffer, and so on.
- NR MAC may have a Bandwidth Adaptation (BA) function.
- BA Bandwidth Adaptation
- the MAC PDU format used in E-UTRA MAC and the MAC PDU format used in NR MAC may be different.
- the MAC PDU may also include a MAC control element (MAC control element: MAC CE), which is an element for performing control in MAC.
- uplink Uplink
- DL Downlink
- E-UTRA E-UTRA
- NR NR
- BCCH Broadcast Control Channel
- SI System Information
- a PCCH may be a downlink logical channel for carrying paging messages.
- a CCCH (Common Control Channel) may be a logical channel for transmitting control information between a terminal device and a base station device.
- CCCH may be used when the terminal does not have an RRC connection.
- CCCH may also be used between the base station apparatus and a plurality of terminal apparatuses.
- DCCH Dedicated Control Channel
- DCCH is a logical channel for transmitting dedicated control information in a one-to-one (point-to-point) bi-directional manner between a terminal device and a base station device. It's okay.
- Dedicated control information may be control information dedicated to each terminal device.
- DCCH may be used when a terminal device has an RRC connection.
- a DTCH (Dedicated Traffic Channel) may be a logical channel for transmitting user data on a one-to-one (point-to-point) basis between a terminal device and a base station device.
- a DTCH may be a logical channel for transmitting dedicated user data.
- Dedicated user data may be user data dedicated to each terminal device.
- DTCH may exist in both uplink and downlink.
- CCCH may be mapped to UL-SCH (Uplink Shared Channel), which is an uplink transport channel.
- UL-SCH Uplink Shared Channel
- the DCCH may be mapped to UL-SCH (Uplink Shared Channel), which is an uplink transport channel.
- UL-SCH Uplink Shared Channel
- DTCH may be mapped to UL-SCH (Uplink Shared Channel), which is an uplink transport channel.
- UL-SCH Uplink Shared Channel
- a BCCH may be mapped to a BCH (Broadcast Channel), which is a downlink transport channel, and/or a DL-SCH (Downlink Shared Channel).
- BCH Broadcast Channel
- DL-SCH Downlink Shared Channel
- PCCH may be mapped to PCH (Paging Channel), which is a downlink transport channel.
- PCH Packet Control Channel
- CCCH may be mapped to DL-SCH (Downlink Shared Channel), which is a downlink transport channel.
- DL-SCH Downlink Shared Channel
- the DCCH may be mapped to DL-SCH (Downlink Shared Channel), which is a downlink transport channel.
- DL-SCH Downlink Shared Channel
- DTCH may be mapped to DL-SCH (Downlink Shared Channel), which is a downlink transport channel.
- DL-SCH Downlink Shared Channel
- RLC may be referred to as an RLC sublayer.
- the E-UTRA RLC may have the function of segmenting and/or concatenating data provided from the PDCP of the upper layer and providing it to the lower layer.
- E-UTRA RLC may have the function of reassembling and re-ordering data provided from lower layers and providing it to upper layers.
- the NR RLC may have a function of adding a sequence number independent of the sequence number added by PDCP to the data provided by PDCP of the upper layer.
- the NR RLC may have a function of segmenting data provided from PDCP and providing it to lower layers.
- the NR RLC may have a function of reassembling data provided from lower layers and providing it to upper layers.
- the RLC may also have a data retransmission function and/or a retransmission request function (Automatic Repeat reQuest: ARQ). Also, the RLC may have a function of error correction by ARQ.
- the control information sent from the RLC receiver to the sender for ARQ indicating the data that needs to be retransmitted may be referred to as a status report. Also, a status report transmission instruction sent from the RLC transmitting side to the receiving side can be called a poll.
- the RLC may also have the capability to detect data duplication. RLC may also have a function of discarding data. RLC may have three modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM).
- the TM does not divide the data received from the upper layer and does not need to add an RLC header.
- a TM RLC entity is a uni-directional entity and may be configured as a transmitting TM RLC entity or as a receiving TM RLC entity.
- the UM divides and/or combines data received from an upper layer, adds an RLC header, etc., but does not need to perform data retransmission control.
- a UM RLC entity may be a unidirectional entity or a bi-directional entity. If the UM RLC entity is a unidirectional entity, the UM RLC entity may be configured as a transmitting UM RLC entity or as a receiving UMRLC entity.
- the UM RRC entity may be configured as a UM RLC entity consisting of a transmitting side and a receiving side.
- the AM may divide and/or combine data received from an upper layer, add an RLC header, control data retransmission, and the like.
- the AM RLC entity is a bi-directional entity and may be configured as an AM RLC consisting of a transmitting side and a receiving side.
- Data provided to lower layers by TM and/or data provided from lower layers may be referred to as TMD PDUs.
- TMD PDUs Data provided by UM to lower layers and/or data provided by lower layers
- UMD PDUs Data provided to the lower layer by AM or data provided from the lower layer
- AMD PDU Data provided to the lower layer by AM or data provided from the lower layer.
- RLC PDU format used in E-UTRA RLC and the RLC PDU format used in NR RLC may differ.
- RLC PDUs may also include RLC PDUs for data and RLC PDUs for control.
- An RLC PDU for data may be called an RLC DATA PDU (RLC Data PDU).
- the control RLC PDU may be called an RLC CONTROL PDU.
- PDCP may be referred to as a PDCP sublayer.
- PDCP may have a function to maintain sequence numbers.
- PDCP may also have a header compression/decompression function for efficiently transmitting user data such as IP packets and Ethernet frames over a wireless section.
- a protocol used for IP packet header compression/decompression may be called ROHC (Robust Header Compression) protocol.
- ROHC Robot Header Compression
- EHC Ethernet (registered trademark) Header Compression
- PDCP may also have a data encryption/decryption function.
- PDCP may also have the function of integrity protection and integrity verification of data.
- PDCP may also have a re-ordering function.
- PDCP may also have a retransmission function for PDCP SDUs.
- PDCP may also have a function of discarding data using a discard timer.
- PDCP may also have a duplication function.
- PDCP may also have a function of discarding duplicated received data.
- the PDCP entity is a bi-directional entity and may consist of a transmitting PDCP entity and a receiving PDCP entity.
- the PDCP PDU format used in E-UTRA PDCP and the PDCP PDU format used in NR PDCP may be different.
- PDCP PDUs may include data PDCP PDUs and control PDCP PDUs.
- a PDCP PDU for data may be called a PDCP DATA PDU (PDCP Data PDU).
- the PDCP PDU for control may be called a PDCP CONTROL PDU (PDCP Control PDU).
- SDAP is the Service Data Adaptation Protocol Layer (Service Data Adaptation Protocol Layer).
- SDAP is a mapping between a downlink QoS flow and a data radio bearer (DRB) sent from the 5GC 110 to the terminal device via the base station device, and/or from the terminal device via the base station device. It may have the ability to map uplink QoS flows sent to the 5GC 110 to the DRB.
- SDAP may also have the function of storing mapping rule information.
- SDAP may also have a function to mark QoS flow identifiers (QoS Flow ID: QFI).
- SDAP PDUs may include data SDAP PDUs and control SDAP PDUs.
- a data SDAP PDU may be called an SDAP DATA PDU.
- a control SDAP PDU may also be called an SDAP CONTROL PDU. Note that one SDAP entity of the terminal device may exist for each PDU session.
- RRC may have a broadcast function.
- RRC may have a paging function from EPC 104 and/or 5GC 110 .
- RRC may have a paging function from eNB102 connected to gNB108 or 5GC100.
- RRC may also have an RRC connection management function.
- RRC may also have a radio bearer control function.
- RRC may also have a cell group control function.
- RRC may also have a mobility control function.
- RRC may also have terminal measurement reporting and terminal measurement reporting control functions.
- RRC may also have QoS management functions.
- RRC may also have radio link failure detection and recovery functionality.
- RRC uses RRC messages (RRC signaling) to perform reporting, paging, RRC connection management, radio bearer control, cell group control, mobility control, terminal measurement reporting and terminal measurement reporting control, QoS management, and radio link failure. Detection, recovery, etc. may be performed. Note that the RRC messages and parameters used in E-UTRA RRC may differ from the RRC messages and parameters used in NR RRC.
- the RRC message may be sent using the logical channel's BCCH, may be sent using the logical channel's PCCH, may be sent using the logical channel's CCCH, or may be sent using the logical channel's DCCH. may be sent. Also, the RRC message sent using the DCCH may be referred to as dedicated RRC signaling or RRC signaling.
- the RRC message sent using BCCH may include, for example, a master information block (Master Information Block: MIB), each type of system information block (System Information Block: SIB) may be included, and others of RRC messages may be included.
- RRC messages sent using the PCCH may include, for example, paging messages and other RRC messages.
- RRC messages sent in the uplink (UL) direction using CCCH include, for example, RRC Setup Request, RRC Resume Request, RRC Reestablishment Request, RRC A system information request message (RRC System Info Request) may be included. Also, for example, RRC Connection Request, RRC Connection Resume Request, RRC Connection Reestablishment Request, etc. may be included. Other RRC messages may also be included.
- RRC messages sent in the downlink (DL) direction using CCCH include, for example, RRC Connection Reject, RRC Connection Setup, RRC Connection Reestablishment, RRC A connection re-establishment rejection message (RRC Connection Reestablishment Reject) may be included. Also, for example, an RRC rejection message (RRC Reject), an RRC setup message (RRC Setup), etc. may be included. Other RRC messages may also be included.
- RRC signaling sent in the uplink (UL) direction using DCCH includes, for example, a Measurement Report message, an RRC Connection Reconfiguration Complete message, an RRC Connection Setup Complete message, An RRC Connection Reestablishment Complete message, a Security Mode Complete message, a UE Capability Information message, etc. may be included. Also for example Measurement Report message, RRC Reconfiguration Complete message, RRC Setup Complete message, RRC Reestablishment Complete message, RRC Resume Complete message ), a security mode complete message (Security Mode Complete), a UE capability information message (UE Capability Information), and the like. Also other RRC signaling may be included.
- RRC signaling sent in the downlink (DL) direction using DCCH includes, for example, RRC Connection Reconfiguration message, RRC Connection Release message, Security Mode Command message, UE A capability inquiry message (UE Capability Inquiry) may be included. Also for example RRC Reconfiguration message, RRC Resume message, RRC Release message (RRC Release message), RRC Reestablishment message (RRC Reestablishment message), Security Mode Command message (Security Mode Command), UE Capability Inquiry message (UE Capability Enquiry), etc. may be included. Also other RRC signaling may be included.
- a NAS may have an authentication function. Also, the NAS may have a function of performing mobility management. The NAS may also have a security control function.
- each layer may be included in another layer (layer).
- UE 122 may be in RRC_CONNECTED state.
- a state in which an RRC connection is established may include a state in which the UE 122 holds some or all of the UE contexts described below.
- states in which an RRC connection is established may include states in which UE 122 is able to transmit and/or receive unicast data.
- UE 122 may also be in RRC_INACTIVE state when the RRC connection is suspended.
- UE 122 may be in RRC_INACTIVE state when UE 122 is connected to 5GC and the RRC connection is dormant.
- a UE 122 may be in the RRC_IDLE state when the UE 122 is neither in the RRC_CONNECTED state nor in the RRC_INACTIVE state.
- UE 122 may initiate dormancy of the RRC connection. If the UE 122 is connected to EPC, when the RRC connection is suspended, the UE 122 may retain the AS context of the UE and an identifier (resumeIdentity) used for resume and transition to the RRC_IDLE state.
- a layer higher than the RRC layer of UE 122 (for example, NAS layer) confirms that UE 122 holds the AS context of the UE, and that the E-UTRAN permits recovery of the RRC connection, and that UE 122 exits the RRC_IDLE state. When it needs to transition to the RRC_CONNECTED state, it may initiate the resumption of a dormant RRC connection.
- the UE 122 connected to the EPC 104 and the UE 122 connected to the 5GC 110 may have different definitions of dormancy. Also, when UE122 is connected to EPC (when UE122 is dormant in RRC_IDLE state) and when UE122 is connected to 5GC (when UE122 is dormant in RRC_INACTIVE state), UE122 all or part of the procedure for waking up from sleep may be different.
- the RRC_CONNECTED state, RRC_INACTIVE state, and RRC_IDLE state may be called connected mode, inactive mode, and idle mode, respectively, and RRC connected mode. , RRC inactive mode, and RRC idle mode.
- the UE AS context held by UE 122 includes the current RRC settings, current security context, PDCP state including ROHC (RObust Header Compression) state, C-RNTI (Cell Radio Network Temporary Identifier), cell identifier (cellIdentity), and physical cell identifier of the connection source PCell, all or part of which may be information.
- the UE AS context held by either or all of the eNB 102 and gNB 108 may contain the same information as the UE AS context held by the UE 122, or the information contained in the UE AS context held by the UE 122. may contain different information.
- a security context consists of a cryptographic key at the AS level, NH (Next Hop parameter), NCC (Next Hop Chaining Counter parameter) used to derive the access key for the next hop, an identifier for the selected AS level encryption algorithm, and replay protection. may be information including all or part of the counters used for
- a serving cell may consist of one primary cell (PCell). Also, in a terminal device in an RRC connected state in which CA and / or DC described later is set, a plurality of serving cells are one or more special cells (Special Cell: SpCell) and one or more all secondary It may mean a set of cells (set of cell(s)) composed of cells (Secondary Cell: SCell).
- the SpCell may support PUCCH transmission and contention-based random access (CBRA), and the SpCell may be activated all the time.
- a PCell may be a cell used for an RRC connection establishment procedure when a terminal device in the RRC idle state transitions to the RRC connected state. Also, the PCell may be a cell used for the RRC connection re-establishment procedure in which the terminal device re-establishes the RRC connection. Also, the PCell may be a cell used for a random access procedure during handover. A PSCell may be a cell used in a random access procedure when adding a secondary node, which will be described later. Also, the SpCell may be a cell that is used for purposes other than those described above.
- a group of serving cells configured for a terminal device is composed of SpCells and one or more SCells may be regarded as carrier aggregation (CA) configured for the terminal device.
- CA carrier aggregation
- a cell that provides an additional radio resource to a SpCell for a terminal device in which CA is configured may mean an SCell.
- TAG Timing Advance Group
- PTAG Primary Timing Advance Group
- STAG Secondary Timing Advance Group
- One or more TAGs may be configured for each cell group, which will be described later.
- a cell group that is set by the base station device for the terminal device will be explained.
- a cell group may consist of one SpCell.
- a cell group may consist of one SpCell and one or more SCells. That is, a cell group may consist of one SpCell and optionally one or more SCells.
- a cell group may also be expressed as a set of cell(s).
- Dual Connectivity performs data communication using the radio resources of cell groups each configured by a first base station device (first node) and a second base station device (second node). It can be technology.
- a cell group may be added from the base station apparatus to the terminal apparatus.
- a first base station apparatus may add a second base station apparatus to perform DC.
- the first base station device may be called a master node (Master Node: MN).
- a cell group configured by a master node may be called a master cell group (MCG).
- MCG master cell group
- the second base station device may be called a secondary node (SN).
- a cell group configured by secondary nodes may be called a secondary cell group (SCG). Note that the master node and the secondary node may be configured within the same base station apparatus.
- the cell group set in the terminal device may be called MCG.
- SpCell configured in the terminal device may be PCell.
- Multi-Radio Dual Connectivity may be a technology that performs DC using E-UTRA for MCG and NR for SCG.
- MR-DC may be a technique of performing DC using NR for MCG and E-UTRA for SCG.
- MR-DC may be a technique of performing DC using NR on both MCG and SCG.
- MR-DC may be a technology involved in DC. Examples of MR-DC using E-UTRA for MCG and NR for SCG include EN-DC (E-UTRA-NR Dual Connectivity) using EPC in the core network and NGEN-DC using 5GC in the core network. There may be DC (NG-RAN E-UTRA-NR Dual Connectivity).
- An example of MR-DC using NR for MCG and E-UTRA for SCG may be NE-DC (NR-E-UTRA Dual Connectivity) using 5GC for the core network.
- An example of MR-DC using NR for both MCG and SCG may be NR-DC (NR-NR Dual Connectivity) using 5GC for the core network.
- one MAC entity may exist for each cell group.
- the MAC entity for the MCG in the terminal may always be established in the terminal in all states (RRC idle state, RRC connected state, RRC inactive state, etc.).
- the MAC entity for the SCG in the terminal device may be created by the terminal device when the SCG is configured in the terminal device.
- the MAC entity for each cell group of the terminal device may be set by the terminal device receiving RRC signaling from the base station apparatus.
- SpCell may mean PCell if the MAC entity is associated with the MCG.
- SpCell may mean a Primary SCG Cell (PSCell).
- SpCell may also mean PCell if the MAC entity is not associated with a cell group.
- PCell, PSCell and SCell are serving cells.
- the MAC entity for MCG may be the E-UTRA MAC entity and the MAC entity for SCG may be the NR MAC entity.
- the MAC entity for MCG may be the NR MAC entity, and the MAC entity for SCG may be the E-UTRA MAC entity.
- both MAC entities for MCG and SCG may be NR MAC entities. Note that one MAC entity for each cell group can be rephrased as one MAC entity for each SpCell. Also, one MAC entity for each cell group may be rephrased as one MAC entity for each SpCell.
- SRB0 to SRB2 may be defined as SRBs of E-UTRA, and SRBs other than these may be defined.
- SRB0 to SRB3 may be defined as SRBs of NR, and SRBs other than these may be defined.
- SRB0 may be the SRB for RRC messages transmitted and/or received using the CCCH of the logical channel.
- SRB1 may be the SRB for RRC signaling and for NAS signaling before the establishment of SRB2.
- RRC signaling transmitted and/or received using SRB1 may include piggybacked NAS signaling.
- the logical channel DCCH may be used for all RRC and NAS signaling transmitted and/or received using SRB1.
- SRB2 may be an SRB for NAS signaling and for RRC signaling including logged measurement information. All RRC signaling and NAS signaling transmitted and/or received using SRB2 may use the DCCH of the logical channel. Also, SRB2 may have a lower priority than SRB1.
- SRB3 may be an SRB for transmitting and/or receiving specific RRC signaling when EN-DC, NGEN-DC, NR-DC, etc. are configured in the terminal device. All RRC and NAS signaling transmitted and/or received using SRB3 may use the DCCH of the logical channel. Other SRBs may also be provided for other uses.
- a DRB may be a radio bearer for user data.
- Logical channel DTCH may be used for RRC signaling transmitted and/or received using DRB.
- Radio bearers may include RLC bearers.
- An RLC bearer may consist of one or two RLC entities and logical channels.
- the RLC entity when there are two RLC entities in the RLC bearer may be a TM RLC entity and/or a transmitting RLC entity and a receiving RLC entity in a unidirectional UM mode RLC entity.
- SRB0 may consist of one RLC bearer.
- An SRB0 RLC bearer may consist of a TM RLC entity and a logical channel. SRB0 may always be established in the terminal device in all states (RRC idle state, RRC connected state, RRC inactive state, etc.).
- One SRB1 may be established and/or configured in the terminal device by RRC signaling received from the base station device when the terminal device transitions from the RRC idle state to the RRC connected state.
- SRB1 may consist of one PDCP entity and one or more RLC bearers.
- the SRB1 RLC bearer may consist of an AM RLC entity and a logical channel.
- One SRB2 may be established and/or configured in the terminal device by RRC signaling received by the terminal device in the RRC connected state with AS security activated from the base station device.
- SRB2 may consist of one PDCP entity and one or more RLC bearers.
- An SRB2 RLC bearer may consist of an AM RLC entity and a logical channel.
- SRB3 is when a secondary node in EN-DC, NGEN-DC, or NR-DC is added, or when the secondary node is changed, the terminal device in the RRC connection state with AS security activated becomes the base station.
- One may be established and/or configured in the terminal by RRC signaling received from the device.
- SRB3 may be a direct SRB between the terminal device and the secondary node.
- SRB3 may consist of one PDCP entity and one or more RLC bearers.
- An SRB3 RLC bearer may consist of an AM RLC entity and a logical channel.
- the PDCP on the base station device side of SRB3 may be placed in the secondary node.
- One or more DRBs may be established and/or configured in the terminal device by RRC signaling received from the base station device by the terminal device in the RRC connected state with AS security activated.
- a DRB may consist of one PDCP entity and one or more RLC bearers.
- a DRB RLC bearer may consist of an AM or UM RLC entity and a logical channel.
- the radio bearer in which PDCP is placed in the master node can be called the MN terminated (terminated) bearer.
- a radio bearer in which PDCP is placed in a secondary node may be called an SN terminated (terminated) bearer.
- a radio bearer in which the RLC bearer exists only in the MCG may be called an MCG bearer.
- a radio bearer whose RLC bearer exists only in the SCG may be called an SCG bearer.
- a radio bearer in which RLC bearers exist in both MCG and SCG may be called a split bearer.
- the bearer types of SRB1 and SRB2 established/and configured in the terminal device may be MN-terminated MCG bearers and/or MN-terminated split bearers.
- the SRB3 bearer type established/or configured in the terminal device may be an SN-terminated SCG bearer.
- the DRB bearer type established/or configured in the terminal device may be any of all bearer types.
- the RLC entity established and/or configured may be E-UTRA RLC.
- the RLC entity established and/or configured may be NR RLC.
- the terminal is configured with EN-DC
- the PDCP entity established and/or configured for the MN-terminated MCG bearer may be either E-UTRA PDCP or NR PDCP.
- bearer type radio bearers i.e.
- MN terminated split bearer MN terminated SCG bearer, SN terminated MCG bearer, SN terminated split bearer and SN terminated SCG bearer, when EN-DC is configured in the terminal equipment.
- the PDCP established and/or configured by the NR may be the NR PDCP.
- the PDCP entity established and/or configured for radio bearers in all bearer types may be NR PDCP. .
- DRBs established and/or configured in terminal equipment may be associated with one PDU session.
- One SDAP entity may be established and/or configured for one PDU session in the terminal device.
- Established and/or Configured in Terminal The SDAP entity, PDCP entity, RLC entity, and logical channels may be established and/or configured by RRC signaling that the terminal receives from the base station.
- a network configuration in which the master node is eNB 102 and EPC 104 is the core network may be called E-UTRA/EPC.
- a network configuration in which the master node is the eNB 102 and the 5GC 110 is the core network may be called E-UTRA/5GC.
- a network configuration in which the master node is gNB 108 and 5GC 110 is the core network may be called NR or NR/5GC.
- the above-mentioned master node may refer to a base station apparatus that communicates with terminal apparatuses.
- Handover may be the process by which a UE 122 in RRC Connected state changes its serving cell from a source SpCell to a target SpCell. Handover may occur when UE 122 receives RRC signaling from eNB 102 and/or gNB 108 indicating a handover.
- the RRC signaling indicating handover may be a message regarding reconfiguration of the RRC connection including parameters indicating handover (for example, an information element named MobilityControlInfo or an information element named ReconfigurationWithSync).
- the information element named MobilityControlInfo described above may be rephrased as a mobility control setting information element, a mobility control setting, or mobility control information.
- the above information element named ReconfigurationWithSync may be rephrased as a reset information element with synchronization or a reset with synchronization.
- the RRC signaling indicating handover may be a message (for example, MobilityFromEUTRACommand or MobilityFromNRCommand) indicating movement to another RAT's cell. Handover can also be rephrased as reconfiguration with sync.
- the conditions under which UE 122 can perform handover include some or all of the following: when AS security is activated, when SRB2 is established, and at least one DRB is established. good.
- FIG. 4 is a diagram showing an example flow of procedures for various settings in RRC according to the present embodiment.
- FIG. 4 is an example flow when RRC signaling is sent from the base station apparatus (eNB 102 and/or gNB 108) to the terminal apparatus (UE 122).
- the base station device creates RRC signaling (step S400). Creation of RRC signaling in the base station apparatus may be performed in order for the base station apparatus to distribute broadcast information (SI: System Information) and paging information. Also, RRC signaling may be created in the base station apparatus so that the base station apparatus causes a specific terminal apparatus to perform processing. The processing to be performed on a specific terminal device may include, for example, security-related settings, RRC connection reconfiguration, handover to a different RAT, RRC connection suspension, RRC connection release, and the like.
- SI System Information
- RRC connection reset processing includes, for example, radio bearer control (establishment, change, release, etc.), cell group control (establishment, addition, change, release, etc.), measurement setting, handover, security key update, etc. may be included.
- the creation of RRC signaling in the base station apparatus may be performed in response to RRC signaling transmitted from the terminal apparatus.
- Responses to RRC signaling sent from the terminal may include, for example, responses to RRC setup requests, responses to RRC reconnection requests, responses to RRC resume requests, and the like.
- RRC signaling includes information (parameters) for various information notifications and settings. These parameters may be called fields and/or information elements, and may be described using the description method ASN.1 (Abstract Syntax Notation One).
- the base station device then transmits the created RRC signaling to the terminal device (step S402).
- the terminal device performs processing such as setting according to the received RRC signaling, if necessary (step S404).
- the terminal device that has performed the processing may transmit RRC signaling for response to the base station device (not shown).
- RRC signaling is not limited to the above examples, and may be used for other purposes.
- RRC on the master node side is used to transfer RRC signaling for SCG side settings (cell group settings, radio bearer settings, measurement settings, etc.) to and from the terminal device. good.
- SCG side settings cell group settings, radio bearer settings, measurement settings, etc.
- the E-UTRA RRC signaling sent and received between the eNB 102 and the UE 122 may include the NR RRC signaling in the form of a container.
- the NR RRC signaling transmitted and received between the gNB 108 and the UE 122 may include the E-UTRA RRC signaling in the form of a container.
- RRC signaling for SCG side configuration may be sent and received between the master and secondary nodes.
- RRC signaling for E-UTRA transmitted from eNB 102 to UE 122 may include RRC signaling for NR, and RRC signaling for NR transmitted from gNB 108 to UE 122 may be included. Signaling may include RRC signaling for E-UTRA.
- FIG. 7 is an example of ASN.1 description representing fields and/or information elements related to cell group setting included in a message related to RRC connection reconfiguration in NR in FIG.
- FIG. 8 is an example of ASN.1 description representing fields and/or information elements related to cell group setting included in the message related to RRC connection reconfiguration in E-UTRA in FIG.
- ⁇ omitted> and ⁇ omitted> are not part of the ASN.1 notation, but other information is omitted. indicate.
- Information elements may be omitted even where there is no description of ⁇ omitted> or ⁇ omitted>.
- the ASN.1 examples in the present embodiment do not correctly follow the ASN.1 notation method.
- the example of ASN.1 represents an example of RRC signaling parameters in this embodiment, and other names and other representations may be used.
- examples of ASN.1 show only examples of main information closely related to this embodiment. Note that all parameters described in ASN.1 may be referred to as information elements without distinguishing between fields, information elements, and the like.
- fields described in ASN.1, information elements, and the like included in RRC signaling may be rephrased as information or parameters.
- the message regarding RRC connection reconfiguration may be an RRC reconfiguration message in NR or an RRC connection reconfiguration message in E-UTRA.
- a master cell group (MCG) and a secondary cell group (SCG) are set by the aforementioned message regarding RRC connection reconfiguration.
- MCG master cell group
- SCG secondary cell group
- Each cell group may consist of a special cell (SpCell) and zero or more other cells (secondary cells: SCells).
- SpCell of MCG is also called PCell.
- SpCell of SCG is also called PSCell.
- Cell deactivation does not apply to SpCells, but may apply to SCells.
- cell deactivation may not be applied to PCells, but may be applied to PSCells. In this case, cell deactivation may be performed differently for SpCells and SCells.
- Cell activation and deactivation may be handled by a MAC entity that exists for each cell group.
- the SCell configured in the terminal device may be activated and/or deactivated by some or all of (A) to (C) below.
- (A) Reception of MAC CE to activate/deactivate SCell (B) SCell inactivity timer set for each SCell in which PUCCH is not set (C) Set for each SCell set in the terminal device RRC parameter (sCellState)
- the MAC entity of the terminal device may perform the following processing (AD) for each SCell set in the cell group.
- processing AD If the RRC parameter (sCellState) set in the SCell when setting the SCell is set to activated, or if a MAC CE that activates the SCell is received, the MAC entity of UE 122 processes (AD-1) I do. Otherwise, if a MAC CE is received to deactivate the SCell or if the SCell inactivity timer expires in an active SCell, the MAC entity of UE 122 performs processing (AD-2).
- an uplink grant or downlink allocation for an active SCell is signaled by the PDCCH of an active SCell, or if an uplink grant or downlink allocation for an active SCell is signaled by the PDCCH of a serving cell, or Once a MAC PDU has been sent on a new uplink grant or received on a configured downlink allocation, the MAC entity of UE 122 restarts the SCell inactivity timer associated with that SCell. If the SCell becomes inactive, the MAC entity of UE 122 performs processing (AD-3).
- this SCell was in an inactive state before receiving the MAC CE that activates this SCell, or if the RRC parameter (sCellState) set in that SCell when setting up the SCell is set to activated If so, the MAC entity of UE 122 performs processing (AD-1A) or processing (AD-1B). The MAC entity of UE 122 also starts or restarts (if already started) the SCell inactivity timer associated with that SCell. If the Active DL BWP is not a dormant BWP (Dormant BWP) described later, the MAC entity of UE 122 performs some or all of (A) to (B) below.
- Dormant BWP dormant BWP
- (A) (re)initialize all suspended configured uplink grants of grant type 1 associated with this SCell according to the stored configuration, if any; (B) Trigger PHR. If a MAC CE that activates a SCell is received, and the BWP indicated by the first active downlink BWP identifier (firstActiveDownlinkBWP-Id) configured in RRC signaling for that SCell is set to a Dormant BWP. If not, the MAC entity of UE 122 takes action (AD-1A).
- MAC CE that activates a SCell is received, and the BWP indicated by the first active downlink BWP identifier (firstActiveDownlinkBWP-Id) configured in RRC signaling for that SCell is set to a Dormant BWP. If so, the MAC entity of UE 122 takes action (AD-1B). Also, the MAC entity of UE 122 implements some or all of (A) to (B) below.
- the MAC entity of UE 122 activates the SCell and performs some or all of (A) through (E) below.
- A) Transmit a Sounding Reference Signal (SRS) on this SCell.
- B) Report CSI for this SCell.
- C) Monitor the PDCCH of this SCell.
- D) Monitor the PDCCH for this SCell. (If scheduling is done for this SCell in another serving cell)
- E) If PUCCH is configured, transmit PUCCH in this SCell.
- the MAC entity of UE 122 performs some or all of (A) through (F) below.
- A Inactivating this SCell.
- B Stop the SCell inactivity timer associated with this SCell.
- C Deactivate all Active BWPs associated with this SCell.
- D Clear all configured downlink assignments and/or all grant type 2 configured uplink grants associated with this SCell.
- E Suspend all configured uplink grants of grant type 1 associated with this SCell.
- the MAC entity of UE 122 performs some or all of (A) through (D) below.
- A) Do not transmit SRS on this SCell.
- B) Do not report CSI for this SCell.
- C Do not transmit PUCCH, UL-SCH and/or RACH on this SCell.
- D Do not monitor the PDCCH of this SCell and/or the PDCCH for this SCell.
- the SCell is activated and deactivated by the processing (AD) performed by the MAC entity.
- the initial state of the SCell may be set by RRC signaling.
- the SCell inactivity timer will be explained.
- the value of the SCell inactivity timer (information regarding the time when the timer is considered to have expired) may be notified by RRC signaling.
- RRC signaling information regarding the time when the timer is considered to have expired
- the SCell deactivation timer may also be a timer named sCellDeactivationTimer.
- bandwidth part (BWP)
- the BWP may be part or all of the bandwidth of the serving cell.
- a BWP may also be called a carrier BWP.
- a terminal device may be configured with one or more BWPs.
- a certain BWP may be set by information included in the broadcast information associated with the synchronization signal detected in the initial cell search.
- a certain BWP may be a frequency bandwidth associated with a frequency for initial cell search.
- Some BWPs may also be configured with RRC signaling (eg Dedicated RRC signaling).
- the downlink BWP (DL BWP) and the uplink BWP (UL BWP) may be configured separately.
- one or more uplink BWPs may be associated with one or more downlink BWPs.
- the association between the uplink BWP and the downlink BWP may be a default association, may be an association by RRC signaling (for example, Dedicated RRC signaling), or may be associated by physical layer signaling (for example, downlink The association may be based on downlink control information (DCI) notified by a control channel, or a combination thereof.
- DCI downlink control information
- a BWP may consist of a group of consecutive physical radio blocks (PRB: Physical Resource Block). Also, parameters of the BWP (one or more BWPs) of each component carrier may be set for the terminal device in the connected state.
- the BWP parameters for each component carrier include (A) the type of cyclic prefix, (B) the subcarrier spacing, (C) the frequency position of the BWP (for example, the start position or center frequency position on the low frequency side of the BWP) ( For the frequency position, for example, ARFCN may be used, or an offset from a specific subcarrier of the serving cell may be used.
- the offset unit may be a subcarrier unit or a resource block unit.
- both ARFCN and offset may be set.
- D BWP bandwidth (e.g. number of PRBs)
- E control signal resource configuration information
- F SS block center frequency.
- the position for example, ARFCN may be used, or an offset from a specific subcarrier of the serving cell may be used.
- the offset unit may be a subcarrier unit, or a resource block unit, and both ARFCN and offset may be set.
- the resource configuration information of the control signal may be included in the BWP configuration of at least some or all of the PCell and/or PSCell.
- a terminal device may transmit and receive in an Active BWP out of one or more set BWPs.
- one or more BWPs configured for one serving cell associated with a terminal device at most one uplink BWP and/or at most one downlink BWP is Active BWP at a certain time. may be set to be Downlink Active BWP is also called Active DL BWP. Uplink Active BWP is also called Active UL BWP.
- One or more BWPs may be configured in one serving cell. BWP switching in the serving cell is used to activate Inactive BWPs and deactivate Active BWPs.
- BWP switching is controlled by the MAC entity itself for PDCCH indicating downlink assignment or uplink grant, BWP inactivity timer, RRC signaling, or initiation of random access procedures.
- Active BWP of the serving cell is indicated by RRC or PDCCH.
- the BWP inactivity timer may also be a timer named bwp-InactivityTimer.
- C if no random access procedure associated with this serving cell is in progress, or an ongoing random access procedure associated with this serving cell is successfully completed upon receipt of a PDCCH addressed to C-RNTI; Once (Successfully completed), start or restart the BWP inactivity timer associated with the Active DL BWP.
- D If the BWP inactivity timer associated with the Active DL BWP expires, the MAC entity performs (E) below.
- E If defaultDownlinkBWP-Id is set, perform BWP switching to the BWP indicated by this defaultDownlinkBWP-Id; otherwise, perform BWP switching to initialDownlinkBWP.
- the MAC entity receives the PDCCH for BWP switching and switches the Active DL BWP, it performs the following (A).
- A If the default downlink BWP identifier (defaultDownlinkBWP-Id) is set, the switched Active DL BWP is not the BWP indicated by the identifier (dormantDownlinkBWP-Id), and if the switched Active DL BWP is dormantDownlinkBWP- If not the BWP indicated by Id, start or restart the BWP inactivity timer associated with the Active DL BWP.
- defaultDownlinkBWP-Id defaultDownlinkBWP-Id
- Inactivation of SCG may mean inactivation of SCG.
- deactivating an SCG may mean deactivating a cell group in which a MAC entity is associated with the SCG and corresponds to the MAC entity.
- Inactivation of SCG may mean inactivation of PSCell (SpCell of SCG) or inactivation of PSCell.
- Activation of SCG may mean activating SCG.
- activating an SCG may mean activating a cell group in which a MAC entity is associated with the SCG and corresponds to said MAC entity.
- Activation of SCG may mean activation of PSCell (SpCell of SCG) or activation of PSCell.
- the SCG inactive state may be a state in which a terminal device performs some or all of (A) to (K) below in the SCG SpCell (PSCell).
- the inactive state of SCG may mean a state in which SCG is inactivated (a state in which SCG is dormant).
- SD-1 (A) Do not transmit SRS on this SpCell.
- B Measure CSI for this SpCell.
- C Do not report CSI for this SpCell.
- D Do not transmit PUCCH, UL-SCH and/or RACH on this SpCell.
- E Do not monitor the PDCCH for this SpCell and/or the PDCCH for this SpCell.
- (F) Perform discontinuous reception (DRX) in this SpCell.
- (G) PDCCH for this SpCell and/or addressed to C-RNTI, MCS-C-RNTI and/or CS-RNTI indicating uplink grant for UL-SCH transmission on this SpCell; Do not monitor PDCCH for (H) PDCCH for this SpCell with BWP activated and addressed to C-RNTI, MCS-C-RNTI and/or CS-RNTI indicating uplink grant in said BWP; and / Or do not monitor the PDCCH for this SpCell.
- (J) Leave suspended some or all configured uplink grants of grant type 1 associated with this SpCell.
- (K) Maintain the timeAlignmentTimer (TAT) associated with the TAG (PTAG) containing this SpCell.
- TAG
- an SCG active state may be a state in which a terminal device implements some or all of (A) to (K) below in the SCG SpCell (PSCell).
- the active state of SCG may mean a state in which SCG is activated (a state in which SCG is not dormant).
- SA-1 (A) Send SRS on this SpCell.
- B Measure CSI for this SpCell.
- C Report CSI for this SpCell.
- D Transmit PUCCH, UL-SCH and/or RACH on this SpCell.
- E Monitor the PDCCH for this SpCell and/or the PDCCH for this SpCell.
- (F) Perform discontinuous reception (DRX) in this SpCell.
- (G) PDCCH for this SpCell and/or addressed to C-RNTI, MCS-C-RNTI and/or CS-RNTI indicating uplink grant for UL-SCH transmission on this SpCell; monitor the PDCCH for (H) PDCCH for this SpCell with BWP activated and addressed to C-RNTI, MCS-C-RNTI and/or CS-RNTI indicating uplink grant in said BWP; and / Or monitor the PDCCH for this SpCell.
- (I) Perform Automatic Gain Control (AGC), Beam Failure Detection (BFD) including beam failure recovery, and/or Radio Link Monitoring (RLM) on this SpCell.
- (J) Maintain some or all configured uplink grants of grant type 1 associated with this SpCell.
- (K) Maintain the timeAlignmentTimer (TAT) associated with the TAG (PTAG) containing this SpCell.
- TAG TimeAlig
- the terminal device may determine that the SCG will be deactivated based on some or all of (A) to (H) below.
- the signaling and control elements (A) to (F) below may be notified from the base station apparatus to the terminal apparatus via the SCG.
- the following signaling and control elements (A) to (F) are notified from the base station apparatus to the terminal apparatus via cell groups other than the SCG (MCG, SCG other than the SCG, etc.) may be (SD-2)
- D Reception of MAC CE instructing SpCell to be deactivated
- E Reception of other RRC signaling
- F Reception of other MAC CE
- G Expiration of SCG inactivity timer
- H PSCell expiration of the inactivity timer of
- FIG. 11 is a diagram showing an example of an embodiment.
- the processing unit 502 of the UE 122 determines that the SCG becomes inactive based on (SD-2) above (step S1100). Also, the processing unit 502 of the UE 122 deactivates the SCG based on the determination, and performs an operation in the deactivated state of the SCG (step S1102).
- the terminal device may determine that the SCG becomes active based on some or all of (A) to (K) below.
- the signaling and control elements (A) to (F) below may be notified from the base station apparatus to the terminal apparatus via the SCG. Additionally or alternatively, the following signaling and control elements (A) to (F) are notified from the base station apparatus to the terminal apparatus via cell groups other than the SCG (MCG, SCG other than the SCG, etc.) may be
- MCG cell groups other than the SCG
- SCG SCG other than the SCG, etc.
- SA-2 (A) Reception of RRC signaling instructing to activate SCG (B) Reception of MAC CE instructing to activate SCG (C) Reception of RRC signaling instructing to activate SpCell (D) ) Receipt of MAC CE instructing to activate SpCell (E) Reception of other RRC signaling (F) Reception of other MAC CE (G) SCG inactivity timer (H) PSCell inactivity timer (I ) initiation of a random access procedure due to a scheduling request triggered to transmit a MAC PDU containing a MAC SDU; (J) initiation of a random access procedure; (K) due to a scheduling request (in other words, the MAC entity itself initiated) random access procedure
- FIG. 10 is a diagram showing an example of an embodiment.
- processing unit 502 of UE 122 determines that the SCG becomes active based on (SA-2) above (step S1000). Also, the processing unit 502 of the UE 122 activates the SCG based on the determination, and performs an operation in the active state of the SCG (step S1002).
- a terminal device that deactivates an SCG may implement some or all of the following (A) to (F) in the SCG.
- SD-3 (A) Inactivate all SCells.
- B Assume that all of the SCell inactivity timers associated with the active SCell have expired.
- C Assume that all SCell inactivity timers associated with the dormant SCell have expired.
- D Do not start or restart the SCell inactivity timers associated with all SCells.
- E Ignore MAC CEs that activate SCells. For example, in the processing (AD), when receiving MAC CE to activate SCell and not instructed to deactivate SCG (or SCG is not inactive state), processing (AD -1).
- AD-2 Execute the above process
- AD-2 For example, when the treatment (AD) instructs to inactivate SCG (or SCG becomes inactive), treatment (AD-2) is performed.
- a terminal device that activates an SCG may implement the following (A) and/or (B) in the SCG.
- SA-3 (A) Treatment (AD-1) is performed to activate all SCells.
- FIG. 9 is a diagram showing an example of an embodiment.
- UE 122 receives a message (RRC signaling, MAC CE, etc.) notifying to deactivate SCG from eNB 102 or gNB 108 (step S900). Based on the notification, UE 122 controls some or all of the cells of the SCG to be inactive (step S902).
- a message RRC signaling, MAC CE, etc.
- the transmission unit 504 of the UE 122 transmits independently the MAC CE for changing the state of the cell of the SCG to the inactive state, efficient state change is possible. Also, when deactivation of the SCG is performed based on RRC signaling, conventionally, the initial state is set in the RRC layer, and the state change is performed in the MAC layer. It is possible to efficiently change the state of the SCG while avoiding a mismatch between the instruction and the MAC layer instruction.
- a terminal device may perform radio link monitoring using a certain type of reference signal (cell-specific reference signal (CRS), etc.) in a serving cell (PCell and/or PSCell, etc.).
- the terminal device receives a setting (radio link monitoring setting: RadioLinkMonitoringConfig) indicating which reference signal is used for radio link monitoring in the serving cell (PCell and/or PSCell, etc.) from the base station device, and sets one or Radio link monitoring may be performed using multiple reference signals (referred to herein as RLM-RS).
- RLM-RS multiple reference signals
- the physical layer processing unit of the terminal device may notify the upper layer that synchronization is in progress when the conditions for being in synchronization are satisfied in the serving cell (PCell and/or PSCell or the like).
- the radio link monitoring settings may include information indicating the purpose of monitoring and identifier information indicating reference signals.
- monitoring purposes may include radio link failure monitoring purposes, beam failure monitoring purposes, or both.
- the identifier information indicating the reference signal may include information indicating the SSB-Index of the SSB of the cell. That is, the reference signal may include the synchronization signal.
- identifier information indicating a reference signal may include information indicating an identifier associated with a channel state information reference signal (CSI-RS) configured in a terminal device.
- CSI-RS channel state information reference signal
- the RRC layer processing unit of the terminal device when the RRC layer processing unit of the terminal device receives out of synchronization notified from the physical layer processing unit in each SpCell a predetermined number of times (N310 times) consecutively, the The SpCell timer (T310) may be started or restarted.
- the RRC layer processing section of the terminal device may stop the timer (T310) of the SpCell when it receives a predetermined number of times (N311 times) consecutively in each SpCell.
- the RRC layer processing unit of the terminal device may transition to the idle state or perform the RRC connection re-establishment procedure. Also, if the SpCell is a PSCell, the RRC layer processing unit of the terminal device may execute an SCG failure information procedure for notifying the network of SCG failure.
- the SCG failure procedure may initiate a procedure to report the SCG failure (SCG failure reporting procedure).
- the RRC layer processing unit of the terminal device must not suspend either MCG transmission or SCG transmission (condition SF-1), and satisfy part or all of (A) to (D) below (condition Initiate the SCG failure reporting procedure based on SF-2).
- A Detection of SCG radio link failure
- B Failure of reconfiguration with SCG synchronization
- C Failure of SCG setup
- D Failure of integrity verification on SRB3 from lower layers of SCG (PDCP)
- the above SCG failure procedure is a procedure when the SCG inactive state is not supported (Release 15, Release 16, etc.), but when the SCG is inactive and the above condition SF-2 is satisfied , may initiate a procedure to report an SCG failure. If the SCG is not inactive, the SCG failure reporting procedure may be initiated based on conditions SF-1 and SF-2 above. Alternatively, however, the above SCG failure procedure may be applied when supporting the SCG inactive state.
- the RRC layer processing unit of the terminal device When initiating the above SCG failure reporting procedure, the RRC layer processing unit of the terminal device performs some or all of (A) to (E) below.
- SFR Suspend SCG transmission for all SRBs, DRBs, and BH RLC channels, if any.
- B Reset the SCG MAC.
- C Stop the timer (T304) for the SCG if it is running.
- D Stop evaluation of conditional reconfiguration for CPC (Conditional PSCell Change), if configured.
- E (NG) If EN-DC, transmit RRC signaling for E-UTRA indicating SCG failure information; otherwise, transmit RRC signaling for NR indicating SCG failure information.
- the above SCG failure reporting procedure is a procedure when the SCG inactive state is not supported (Release 15, Release 16, etc.), but when the SCG is in the inactive state, out of the above (SFR) Some or all of (A), (B), and (E) may not be performed. If the SCG is not in an inactive state, some or all of (SFR) above may be implemented. Alternatively, however, the above SCG failure reporting procedure may be applied when supporting the SCG inactive state.
- BFD beam failure detection
- beam failure recovery procedures may be configured by RRC for each serving cell.
- the beam failure recovery procedure allows the serving gNB (the base station equipment in communication with the terminal equipment) to receive a new SSB or CSI when a beam failure is detected on one or more SSBs and/or CSI-RSs of the serving cell. May be used to notify -RS.
- Beam failure is detected by counting beam failure instance notifications signaled to the MAC entity from lower layers (PHY layer).
- the MAC entity may perform some or all of (A), (B), and (C) below at each serving cell for beam failure detection.
- A If a beam failure instance notification is received from the lower layer, start or restart the beam failure detection timer (beamFailureDetectionTimer) and increment the counter (BFI_COUNTER) by one. If the value of BFI_COUNTER is equal to or greater than the set threshold (beamFailureInstanceMaxCount), perform (A-1) below. (A-1) If the serving cell is a SCell, trigger beam failure recovery (BFR) for this serving cell, else initiate a random access procedure on the SpCell.
- beamFailureDetectionTimer start or restart the beam failure detection timer
- BFI_COUNTER increment the counter
- (B) Set BFI_COUNTER to 0 if the beamFailureDetectionTimer for this serving cell has expired or if the beamFailureDetectionTimer, beamFailureInstanceMaxCount, and/or the reference signal settings for beam failure detection have been changed by upper layers.
- (C) If the serving cell is a SpCell and the random access procedure is successfully completed, set BFI_COUNTER to 0, stop the beam failure recovery timer (beamFailureRecoveryTimer) if it is set and running, and beam fail Consider the recovery procedure completed successfully.
- a new uplink grant to transmit information for the SCell's beam failure recovery (e.g., information included in the SCell's BFR MAC CE or the SCell's truncated BFR MAC CE).
- the SCell is in the inactive state, set BFI_COUNTER to 0 and consider the beam failure recovery procedure to be successfully completed for this serving cell. Cancels any Beam Failure Recovery (BFR) that has been triggered.
- BFR Beam Failure Recovery
- the MAC entity performs (A) below if at least one beam failure recovery (BFR) has been triggered by the beam failure recovery procedure and it has not been canceled.
- BFR beam failure recovery
- the UL-SCH resource can include the BFR MAC CE of the SCell and its subheader considering the priority of the logical channel, then the BFR MAC CE of the SCell and its subheader are included. Otherwise, if the UL-SCH resource can contain the SCell's truncated BFR MAC CE and its subheaders considering the logical channel priority, then the SCell's truncated BFR MAC CE and its Include subheaders. Otherwise, trigger a scheduling request for SCell beam failure recovery.
- the MAC entity may start the beamFailureRecoveryTimer when the random access procedure is initiated for the SpCell's BFR and the beamFailureRecoveryConfig is set to Active UL BWP. Also, if the beamFailureRecoveryTimer is running or not set, the terminal may use contention-free Random Access (CFRA) for BFR. Also, if the beamFailureRecoveryTimer has expired or is not running, the terminal may not use CFRA for BFR, but instead use eg CBRA.
- CFRA contention-free Random Access
- FIG. 5 is a block diagram showing the configuration of the terminal device (UE 122) in this embodiment. In order to avoid complicating the description, FIG. 5 shows only main components closely related to the present embodiment.
- UE 122 shown in FIG. 5 includes a receiving section 500 that receives RRC signaling and the like from the base station apparatus, a processing section 502 that performs processing according to parameters included in the received message, and a transmitting section that transmits RRC signaling and the like to the base station apparatus. 504, consisting of The base station apparatus described above may be eNB 102 or gNB 108 .
- processing unit 502 may include some or all of the functionality of various layers (eg, physical layer, MAC layer, RLC layer, PDCP layer, SDAP layer, RRC layer, and NAS layer). That is, the processing unit 502 includes part or all of the physical layer processing unit, MAC layer processing unit, RLC layer processing unit, PDCP layer processing unit, SDAP processing unit, RRC layer processing unit, and NAS layer processing unit. you can
- FIG. 6 is a block diagram showing the configuration of the base station apparatus in this embodiment. In order to avoid complicating the description, FIG. 6 shows only main components closely related to the present embodiment.
- the base station apparatus described above may be eNB 102 or gNB 108 .
- the base station apparatus shown in FIG. 6 includes a transmission unit 600 that transmits RRC signaling and the like to UE 122, and a processing unit that creates RRC signaling including parameters and transmits it to UE 122, thereby allowing processing unit 502 of UE 122 to perform processing. 602 and a receiver 604 that receives RRC signaling etc. from the UE 122 .
- processing unit 602 may include some or all of the functionality of various layers (eg, physical layer, MAC layer, RLC layer, PDCP layer, SDAP layer, RRC layer, and NAS layer). That is, the processing unit 602 includes part or all of the physical layer processing unit, MAC layer processing unit, RLC layer processing unit, PDCP layer processing unit, SDAP processing unit, RRC layer processing unit, and NAS layer processing unit. you can
- FIG. 10 is a diagram showing an example of processing of the terminal device in this embodiment.
- the processing unit 502 of the UE 122 may determine that the SCG becomes active based on (SA-2) above (step S1000). Also, the processing unit 502 of the UE 122 may operate in the active state based on the determination (step S1002).
- the UE 122 in the active state, may perform part or all of the processing shown in (SA-1) above in each of the SpCells and/or one or more SCells of a certain cell group.
- the active state may be a state in which the SCG is activated. Also, the active state described above may be a state in which the SCG has resumed from a dormant state. Also, the active state described above may be a state in which the SCG described above is not in a dormant state. Also, the active state described above may be the state transitioned from the inactive state when a random access procedure due to a scheduling request triggered to transmit a MAC PDU containing a MAC SDU is initiated. . Further, the active state described above may be a state that transitions from the inactive state when the RRC entity instructs to return from the dormant state.
- the processing unit 502 of the UE 122 may determine that the SCG has transitioned from the inactive state to the active state as shown in (SA-2) above.
- the UE 122 may transition the SCG from the inactive state to the active state (in other words, activate the SCG). Also, upon receiving information instructing the SCG to return from the dormant state (Resume), the UE 122 may cause the SCG to transition from the inactive state to the active state. Also, upon receiving information instructing the SpCell to return from the dormant state, the UE 122 may cause the SCG to transition from the inactive state to the active state. UE 122 may also transition the SCG from the inactive state to the active state upon receiving other information. Also, the UE 122 may transition the SCG from the inactive state to the active state based on the SCG dormancy timer.
- the UE 122 may transition the SCG from the inactive state to the active state based on the PSCell sleep timer. UE 122 may also transition the SCG from the inactive state to the active state when initiating a random access procedure due to a scheduling request triggered to send a MAC PDU containing a MAC SDU. Also, the UE 122 may transition the SCG from the inactive state to the active state when starting the random access procedure. The UE 122 may also transition the SCG from inactive to active when initiating a random access procedure resulting from a scheduling request (in other words, initiated by the MAC entity itself).
- the MAC entity of UE 122 may also obtain an indication to activate an SCG, an indication to wake from a dormant SCG, an indication to wake SpCell from dormancy, and/or other information from the RRC entity of UE 122. .
- UE 122 determines that the SCG becomes active as shown in (SA-2) above, and transitions the SCG from the inactive state to the active state. You may let The UE 122 may perform the processing shown in (SA-3) above when making the SCG transition from the inactive state to the active state.
- FIG. 11 is a diagram showing an example of processing of the terminal device in this embodiment.
- the processing unit 502 of the UE 122 may determine that the SCG becomes inactive based on (SD-2) above (step S1100). Also, the processing unit 502 of the UE 122 may operate in the inactive state based on the determination (step S1102).
- the UE 122 in the inactive state, may perform some or all of the processing as indicated in (SD-1) above in each of the SpCells and/or one or more SCells of a cell group.
- the inactive state may be a state in which the SCG is inactivated. Also, the inactive state described above may be Entering a dormant SCG. Also, the inactive state described above may be the dormant state of the SCG described above. The inactive state may also be a state in which the SpCell of the SCG and/or the Active BWP of one or more SCells are dormant BWPs. Also, the inactive state described above may be a transition state from the active state when a random access procedure due to a scheduling request triggered to transmit a MAC PDU containing a MAC SDU is initiated. . Also, the inactive state described above may be a state transitioned from the active state when the RRC entity instructs to enter the dormant state.
- the processing unit 502 of the UE 122 may determine that the SCG has transitioned from the active state to the inactive state as shown in (SD-2) above.
- the UE 122 may transition the SCG from the active state to the inactive state. Also, upon receiving information instructing entry into the dormant SCG, the UE 122 may transition the SCG from the active state to the inactive state. Also, upon receiving information instructing SpCell dormancy, the UE 122 may transition the SCG from the active state to the inactive state. UE 122 may also transition the SCG from the active state to the inactive state upon receiving other information. Also, the UE 122 may cause the SCG to transition from the active state to the inactive state when the SCG dormancy timer expires.
- the UE 122 may transition the SCG from the active state to the inactive state when the PSCell sleep timer expires.
- the MAC entity of UE 122 may also obtain an indication to deactivate an SCG, an indication to enter a dormant SCG, an indication to dormant SpCells, and/or other information from the RRC entity of UE 122.
- UE 122 determines that the SCG becomes inactive as shown in (SD-2) above, and changes the SCG from active to inactive state. You can transition.
- the UE 122 may perform the processing shown in (SD-3) above when making the SCG transition from the active state to the inactive state.
- FIG. 12 is a diagram showing an example of processing of the terminal device in this embodiment.
- the processing unit 502 of the UE 122 receives signaling notifying that the SCG is to be deactivated from the base station device (step S1200)
- the processing unit 502 deactivates the SCG (step S1202), and the information is included in the signaling. (Step S1204), and based on the judgment, perform an operation (Step S1206).
- the action may be based on the processing unit 502 of the UE 122 deactivating the SCG, or otherwise.
- the operation based on deactivating the SCG is part of the processing as shown in (SD-1) above in each of the SCG SpCell (PSCell) and / or one or more SCells Or it may be to implement all.
- the information may be information indicating that radio link monitoring is to be performed while the SCG is inactive, that is, RLM information. Also, in step S1204, for example, the information may be information indicating that beam failure detection is to be performed in the inactive state of the SCG, that is, BFD information. Also, in step S1204, for example, the information may be information indicating that both radio link monitoring and beam failure detection are to be performed in the inactive state of the SCG, ie, RLM-BFD information.
- step S1204 when the processing unit 502 of the UE 122 determines that the RLM information is not included, in step S1206, for example, the operation is based on the fact that the processing unit 502 of the UE 122 deactivated the SCG, If the PSCell's timer (T310) is running, it may be stopped. At this time, for example, by stopping the PSCell timer (T310), when the SCG is inactive, the terminal device does not perform radio link monitoring in the SCG, resulting in the effect of reducing power consumption. There is expected.
- step S1204 when the processing unit 502 of the UE 122 determines that the RLM-BFD information is not included, in step S1206, for example, the operation is that the processing unit 502 of the UE 122 deactivates the SCG. , the PSCell's timer (T310) may be stopped if it is running.
- step S1204 if the processing unit 502 of the UE 122 determines that the RLM information is included, the processing unit 502 of the UE 122, based on the deactivation of the SCG, activates the PSCell timer ( T310) does not need to be stopped.
- the action may be performing or continuing radio link monitoring.
- the action may be to stop the timer (T310) of the PSCell if it is running, other than by deactivating the SCG.
- step S1204 if the processing unit 502 of the UE 122 determines that the RLM-BFD information is included, the processing unit 502 of the UE 122, based on the deactivation of the SCG, the PSCell You don't have to stop the timer (T310).
- the action may be performing or continuing radio link monitoring. Also, in step S1206, for example, the action may be to stop the timer (T310) of the PSCell if it is running, other than by deactivating the SCG.
- step S1204 if the processing unit 502 of the UE 122 determines that the BFD information is not included, in step S1206, for example, the processing unit 502 of the UE 122 deactivates the SCG. Based on that, set the PSCell's BFI_COUNTER to 0 and additionally or alternatively stop if the beamFailureRecoveryTimer is set and running, and additionally or alternatively the beam failure recovery procedure succeeds. It may be considered as completed behind the scenes. Then, for example, by considering the beam failure recovery procedure to be completed successfully, the terminal device does not perform beam failure detection in the SCG when the SCG is inactive, thereby reducing power consumption. It is expected that such an effect can be achieved.
- step S1204 when the processing unit 502 of the UE 122 determines that the RLM-BFD information is not included, in step S1206, for example, the operation is that the processing unit 502 of the UE 122 deactivates the SCG. , set the PSCell's BFI_COUNTER to 0 and additionally or alternatively stop if beamFailureRecoveryTimer is set and running; may be deemed to have been completed as soon as possible.
- step S1204 if the processing unit 502 of the UE 122 determines that the BFD information is included, the processing unit 502 of the UE 122, based on the deactivation of the SCG, BFI_COUNTER of PSCell It may not be set to 0 and additionally or alternatively the beamFailureRecoveryTimer may not be stopped and additionally or alternatively the beam failure recovery procedure may not be considered successfully completed. At this time, in step S1206, for example, the action may be performing beam failure detection or continuing.
- step S1206 the operation is to set the BFI_COUNTER of the PSCell to 0 on the basis of other than deactivating the SCG, and additionally or alternatively, if the beamFailureRecoveryTimer is set. It may additionally or alternatively consider said beam failure recovery procedure to have been successfully completed.
- step S1204 if the processing unit 502 of the UE 122 determines that the RLM-BFD information is included, the processing unit 502 of the UE 122, based on the deactivation of the SCG, the PSCell The BFI_COUNTER may not be set to 0, the beamFailureRecoveryTimer may not additionally or alternatively be stopped, and the beam failure recovery procedure may additionally or alternatively not be considered successfully completed. At this time, in step S1206, for example, the action may be performing beam failure detection or continuing.
- step S1206 the operation is to set the BFI_COUNTER of the PSCell to 0 on the basis of other than deactivating the SCG, and additionally or alternatively, if the beamFailureRecoveryTimer is set. It may additionally or alternatively consider said beam failure recovery procedure to have been successfully completed.
- the signaling may be the signaling shown in (SD-2) above, or may be other signaling.
- the UE 122 may perform the processing shown in (SD-3) above when deactivating the SCG.
- radio link monitoring and beam failure detection when the radio link monitoring and beam failure detection are unnecessary in the inactive state of the SCG, it is possible not to perform radio link monitoring and beam failure detection. Also, power can be saved by not performing radio link monitoring and beam failure detection when the SCG is inactive.
- the radio bearers in the above description may be DRB, SRB, or both DRB and SRB.
- SCG SpCell may be replaced with “PSCell”.
- the "dormant state” may be replaced with the “inactive state”
- the "state recovered from the dormant state” may be replaced with the “active state”.
- activation and “inactivation” may be replaced with “active state” and “inactive state”, respectively.
- A may be rephrased as B” may include the meaning of rephrasing B as A in addition to rephrasing A as B.
- C may be D
- C may be E
- D may be E
- F may be G
- G may be H
- F may be H
- condition "A” and the condition “B” are contradictory conditions, the condition “B” may be expressed as the “other” condition of the condition "A”. good.
- the program that runs on the device related to this embodiment may be a program that controls the Central Processing Unit (CPU) and the like to make the computer function so as to realize the functions of this embodiment.
- the program or information handled by the program is temporarily read into volatile memory such as Random Access Memory (RAM) during processing, or stored in non-volatile memory such as flash memory or Hard Disk Drive (HDD), and
- RAM Random Access Memory
- HDD Hard Disk Drive
- part of the devices in the above-described embodiments may be realized by a computer.
- the program for realizing this control function may be recorded in a computer-readable recording medium, and the program recorded in this recording medium may be read into a computer system and executed.
- the "computer system” here is a computer system built in the device, and includes hardware such as an operating system and peripheral devices.
- the "computer-readable recording medium” may be any of a semiconductor recording medium, an optical recording medium, a magnetic recording medium, and the like.
- “computer-readable recording medium” means a medium that dynamically stores programs for a short period of time, such as a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line. , it may also include something that holds the program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in that case. Further, the program may be for realizing a part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system. .
- each functional block or feature of the apparatus used in the embodiments described above may be implemented or performed in an electrical circuit, typically an integrated circuit or multiple integrated circuits.
- Electrical circuits designed to perform the functions described herein may be general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or combinations thereof.
- a general purpose processor may be a microprocessor, in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
- the general-purpose processor or each circuit described above may be composed of digital circuits or may be composed of analog circuits.
- an integrated circuit technology that replaces current integrated circuits emerges due to advances in semiconductor technology, it is also possible to use integrated circuits based on this technology.
- this embodiment is not limited to the embodiment described above.
- an example of the device was described, but the present embodiment is not limited to this, and is a stationary or non-movable electronic device installed indoors or outdoors, such as AV equipment, kitchen equipment , cleaning/washing equipment, air-conditioning equipment, office equipment, vending machines, other household equipment, and other terminal equipment or communication equipment.
- One aspect of the present invention is, for example, a communication system, a communication device (e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (e.g., a communication chip), or a program, etc. be able to.
- a communication device e.g., a mobile phone device, a base station device, a wireless LAN device, or a sensor device
- an integrated circuit e.g., a communication chip
- a program etc. be able to.
- E-UTRA 102 eNB 104 EPCs 106NR 108 gNB 110 5GC 112, 114, 116, 118, 120, 124 interfaces 122 UEs 200, 300 PHYs 202, 302 MACs 204, 304 RLC 206, 306 PDCP 208, 308 RRC 310 SDAP 210, 312 NAS 500, 604 Receiver 502, 602 processor 504, 600 transmitter
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Abstract
Description
本願は、2021年10月13日に日本に出願された特願2021-167968号について優先権を主張し、その内容をここに援用する。
PDCCH(物理下りリンク制御チャネル:Physical Downlink Control CHannel)
PDSCH(物理下りリンク共用チャネル:Physical Downlink Shared CHannel)
PUCCH(物理上りリンク制御チャネル:Physical Uplink Control CHannel)
PUSCH(物理上りリンク共用チャネル:Physical Uplink Shared CHannel)
PRACH(物理ランダムアクセスチャネル:Physical Random Access CHannel)
(A)SCellを活性化/不活性化させるMAC CEの受信
(B)PUCCHが設定されていないSCell毎に設定されているSCell不活性タイマー
(C)端末装置に設定されたSCell毎に設定されているRRCパラメータ(sCellState)
もし、SCell設定の際にSCellに設定されているRRCパラメータ(sCellState)がactivatedに設定されている、またはSCellを活性化させるMAC CEを受信した場合、UE122のMACエンティティは処理(AD-1)を行う。そうでなく、もし、SCellを不活性化させるMAC CEを受信した、または、活性状態のSCellにおいてSCell不活性タイマーが満了したら、UE122のMACエンティティは処理(AD-2)を行う。もし、活性状態のSCellのPDCCHによって上りリンクグラントまたは下りリンク割り当てが通知されたら、または、あるサービングセルのPDCCHによって、活性状態のSCellに対する上りリンクグラントまたは下りリンク割り当てが通知されたら、または、設定された上りリンクグラントにおいてMAC PDUが送信された、または、設定された下りリンク割り当てにおいてMAC PDUが受信されたら、UE122のMACエンティティはそのSCellに関連付けられたSCell不活性タイマーを再スタートする。もし、SCellが不活性状態となったら、UE122のMACエンティティは処理(AD-3)を行う。
もし、NRにおいて、このSCellを活性化させるMAC CEを受信する前にこのSCellが不活性状態であった、またはSCell設定の際にそのSCellに設定されているRRCパラメータ(sCellState)がactivatedに設定されているならば、UE122のMACエンティティは処理(AD-1A)または処理(AD-1B)を行う。
また、UE122のMACエンティティはそのSCellに対応付けられたSCell不活性タイマーをスタート、または(すでにスタートしている場合は)再スタートする。
もし、Active DL BWPが後述の休眠BWP(Dormant BWP)でない場合、UE122のMACエンティティは下記(A)から(B)の一部または全部を実施する。
(A)もしあれば貯蓄された設定(stored configuration)に従って、このSCellに対応付けられている、グラントタイプ1のサスペンドされたすべてのコンフィギュアード上りリンクグラントを(再び)初期化する。
(B)PHRをトリガする。
もし、SCellを活性化させるMAC CEを受信し、そのSCellに対してRRCシグナリングで設定されている第1アクティブ下りリンクBWP識別子(firstActiveDownlinkBWP-Id)で示されるBWPが休眠(Dormant)BWPに設定されていない場合、UE122のMACエンティティは処理(AD-1A)を行う。もし、SCellを活性化させるMAC CEを受信し、そのSCellに対してRRCシグナリングで設定されている第1アクティブ下りリンクBWP識別子(firstActiveDownlinkBWP-Id)で示されるBWPが休眠(Dormant)BWPに設定されている場合、UE122のMACエンティティは処理(AD-1B)を行う。また、UE122のMACエンティティは下記(A)から(B)の一部または全部を実施する。
(A)RRCシグナリングで設定されている第1アクティブ下りリンクBWP識別子(firstActiveDownlinkBWP-Id)で示されるBWPを活性化する
(B)RRCシグナリングで設定されている第1アクティブ上りリンクBWP識別子(firstActiveUplinkBWP-Id)で示されるBWPを活性化する
UE122のMACエンティティはSCellを活性化し、下記(A)から(E)の一部または全部を実施する。
(A)このSCellでサウンディング参照信号(SRS)を送信する。
(B)このSCellのためのCSIを報告する。
(C)このSCellのPDCCHをモニタする。
(D)このSCellに対するPDCCHをモニタする。(他のサービングセルにおいてこのSCellに対するスケジュールが行われる場合)
(E)もしPUCCHが設定されていれば、このSCellでPUCCHを送信する。
UE122のMACエンティティはこのサービングセルのBWP不活性タイマーが走っているならば停止する。
UE122のMACエンティティは下記(A)から(F)の一部または全部を実施する。
(A)このSCellを不活性化する。
(B)このSCellに対応付けられたSCell不活性タイマーを停止する。
(C)このSCellに対応付けられたすべてのActive BWPを不活性化する。
(D)このSCellに対応付けられたすべての設定された下りリンク割り当ておよび/またはすべてのグラントタイプ2のコンフィギュアード上りリンクグラントをクリアする。
(E)このSCellに対応付けられたすべてのグラントタイプ1のコンフィギュアード上りリンクグラントをサスペンドする。
(F)このSCellに対応付けられたHARQのバッファをフラッシュする。
UE122のMACエンティティは下記(A)から(D)の一部または全部を実施する。
(A)このSCellでSRSを送信しない。
(B)このSCellのためのCSIを報告しない。
(C)このSCellでPUCCH、UL-SCH、および/またはRACHを送信しない。
(D)このSCellのPDCCH、および/またはこのSCellに対するPDCCHのモニタをしない。
(A)もしデフォルト下りリンクBWPの識別子(defaultDownlinkBWP-Id)が設定されており、Active DL BWPが識別子(dormantDownlinkBWP-Id)で示されるBWPでない、または、もしデフォルト下りリンクBWPの識別子(defaultDownlinkBWP-Id)が設定されておらず、Active DL BWPがinitialDownlinkBWPでなく、Active DL BWPが識別子(dormantDownlinkBWP-Id)で示されるBWPでないなら、MACエンティティは次の(B)および(D)を実施する。
(B)もし、Active DL BWPで、下りリンク割り当て(Assignment)または上りリンクグラントを示す、C-RNTIまたはCS-RNTIにアドレスされたPDCCHを受信した、または、もし、Active DL BWPのための、下りリンク割り当てまたは上りリンクグラントを示す、C-RNTIまたはCS-RNTIにアドレスされたPDCCHを受信した、または、もし、コンフィギュアード上りリンクグラントでMAC PDUが送信された、またはコンフィギュアード下りリンク割り当てでMAC PDUが受信されたなら、MACエンティティは次の(C)を実施する。
(C)もし、このサービングセルに関連付けられたランダムアクセス手順が実行中でない、または、このサービングセルに関連付けられた実行中のランダムアクセス手順が、C-RNTIにアドレスされたPDCCHの受信によって成功裏に完了(Successfully completed)したら、Active DL BWPに関連付けられたBWP不活性タイマーをスタートまたは再スタートする。
(D)もし、Active DL BWPに関連付けられたBWP不活性タイマーが満了(Expire)したら、MACエンティティは次の(E)を実施する。
(E)もし、defaultDownlinkBWP-Idが設定されていたら、このdefaultDownlinkBWP-Idで示されるBWPにBWP切り替えをおこない、そうでないなら、initialDownlinkBWPにBWP切り替えをおこなう。
(A)もしデフォルト下りリンクBWPの識別子(defaultDownlinkBWP-Id)が設定されており、切り替えたActive DL BWPが識別子(dormantDownlinkBWP-Id)で示されるBWPでない、かつ、もし切り替えたActive DL BWPがdormantDownlinkBWP-Idで示されるBWPでないなら、Active DL BWPに関連付けられたBWP不活性タイマーをスタートまたは再スタートする。
(SD-1)
(A)このSpCellでSRSを送信しない。
(B)このSpCellのためのCSIを測定する。
(C)このSpCellのためのCSIを報告しない。
(D)このSpCellでPUCCH、UL-SCH、および/またはRACHを送信しない。
(E)このSpCellのPDCCH、および/またはこのSpCellに対するPDCCHをモニタしない。
(F)このSpCellで間欠受信(DRX)を行う。
(G)このSpCellでのUL-SCH送信のための上りリンクグラントを示すC-RNTI、MCS-C-RNTI、および/またはCS-RNTIにアドレスされた、このSpCellのPDCCH、および/またはこのSpCellに対するPDCCHをモニタしない。
(H)このSpCellでBWPが活性化されており、上述のBWPにおいて上りリンクグラントを示すC-RNTI、MCS-C-RNTI、および/またはCS-RNTIにアドレスされた、このSpCellのPDCCH、および/またはこのSpCellに対するPDCCHをモニタしない。
(I)このSpCellで自動増幅制御(Automatic Gain Control:AGC)、ビーム失敗回復を含むビーム失敗検出(Beam Failure Detection:BFD)、および/または無線リンクモニタリング(Radio Link Monitoring:RLM)を行わない。
(J)このSpCellに対応付けられている、グラントタイプ1の一部またはすべてのコンフィギュアード上りリンクグラントをサスペンドのままにする。
(K)このSpCellを含むTAG(PTAG)に関連付けられたtimeAlignmentTimer(TAT)を維持する。
(SA-1)
(A)このSpCellでSRSを送信する。
(B)このSpCellのためのCSIを測定する。
(C)このSpCellのためのCSIを報告する。
(D)このSpCellでPUCCH、UL-SCH、および/またはRACHを送信する。
(E)このSpCellのPDCCH、および/またはこのSpCellに対するPDCCHをモニタする。
(F)このSpCellで間欠受信(DRX)を行う。
(G)このSpCellでのUL-SCH送信のための上りリンクグラントを示すC-RNTI、MCS-C-RNTI、および/またはCS-RNTIにアドレスされた、このSpCellのPDCCH、および/またはこのSpCellに対するPDCCHをモニタする。
(H)このSpCellでBWPが活性化されており、上述のBWPにおいて上りリンクグラントを示すC-RNTI、MCS-C-RNTI、および/またはCS-RNTIにアドレスされた、このSpCellのPDCCH、および/またはこのSpCellに対するPDCCHをモニタする。
(I)このSpCellで自動増幅制御(Automatic Gain Control:AGC)、ビーム失敗回復を含むビーム失敗検出(Beam Failure Detection:BFD)、および/または無線リンクモニタリング(Radio Link Monitoring:RLM)を行う。
(J)このSpCellに対応付けられている、グラントタイプ1の一部またはすべてのコンフィギュアード上りリンクグラントを維持する。
(K)このSpCellを含むTAG(PTAG)に関連付けられたtimeAlignmentTimer(TAT)を維持する。
(SD-2)
(A)SCGを不活性化するように指示するRRCシグナリングの受信
(B)SCGを不活性化するように指示するMAC CEの受信
(C)SpCellを不活性化するように指示するRRCシグナリングの受信
(D)SpCellを不活性化するように指示するMAC CEの受信
(E)その他のRRCシグナリングの受信
(F)その他のMAC CEの受信
(G)SCGの不活性タイマーの満了
(H)PSCellの不活性タイマーの満了
(SA-2)
(A)SCGを活性化するように指示するRRCシグナリングの受信
(B)SCGを活性化するように指示するMAC CEの受信
(C)SpCellを活性化するように指示するRRCシグナリングの受信
(D)SpCellを活性化するように指示するMAC CEの受信
(E)その他のRRCシグナリングの受信
(F)その他のMAC CEの受信
(G)SCGの不活性タイマー
(H)PSCellの不活性タイマー
(I)MAC SDUが含まれるMAC PDUを送信するためにトリガされたスケジューリングリクエストに起因するランダムアクセス手順の開始
(J)ランダムアクセス手順の開始
(K)スケジューリングリクエストに起因する(言い換えると、MACエンティティ自身が開始した)ランダムアクセス手順の開始
(SD-3)
(A)すべてのSCellを不活性化する。
(B)活性状態のSCellに関連付けられたSCell不活性タイマーのすべてが満了したとみなす。
(C)休眠状態のSCellに関連付けられたSCell不活性タイマーのすべてが満了したとみなす。
(D)すべてのSCellに関連付けられたSCell不活性タイマーをスタートまたは再スタートしない。
(E)SCellを活性化させるMAC CEを無視する。例えば、前記処理(AD)において、SCellを活性化させるMAC CEを受信して、かつ、SCGを不活性化するように指示されてない(またはSCGの不活性状態でない)場合に、処理(AD-1)を行う。
(F)前記処理(AD-2)を実行する。例えば、前記処理(AD)において、SCGを不活性化するように指示された(またはSCGの不活性状態となった)場合に、処理(AD-2)を行う。
(SA-3)
(A)すべてのSCellを活性化するために、処理(AD-1)を行う。
(B)SCGの活性化をRRCシグナリングに基づいて実行する場合、このRRCシグナリングに、SpCell(PSCell)に対するランダムアクセスに関するパラメータが含まれるなら、通知されたパラメータに基づき、このSpCellにおいてランダムアクセス手順を開始する。
(A)SCG無線リンク失敗の検出
(B)SCG同期付再設定の失敗
(C)SCG設定の失敗
(D)SCGの下位レイヤ(PDCP)からの、SRB3に関する完全性検証の失敗
(SFR)
(A)すべてのSRBs、DRBs、および、もしあればBH RLC channelsのためのSCG送信をサスペンドする。
(B)SCG MACをリセットする。
(C)SCGのためのタイマー(T304)が走っているならば停止する。
(D)CPC(Conditional PSCell Change)のための条件付再設定の評価(evaluation)を、もし設定されているならば停止する。
(E)(NG)EN-DCの場合、SCG失敗情報を示すE-UTRA用RRCシグナリングを送信し、それ以外の場合、SCG失敗情報を示すNR用RRCシグナリングを送信する。
(A)もし、下位レイヤからビーム失敗インスタンス通知を受信したら、ビーム失敗検出タイマー(beamFailureDetectionTimer)をスタートまたは再スタートし、カウンター(BFI_COUNTER)を1加算する。もしBFI_COUNTERの値が設定された閾値(beamFailureInstanceMaxCount)以上であれば、下記の(A-1)を実施する。
(A-1)もし、サービングセルがSCellなら、このサービングセルに対するビーム失敗回復(BFR)をトリガし、そうでなければ、SpCellでランダムアクセス手順を開始する。
(B)もし、このサービングセルに対する、beamFailureDetectionTimerが満了した、または、もし、beamFailureDetectionTimer、beamFailureInstanceMaxCount、および/またはビーム失敗検出のための参照信号の設定が上位レイヤによって変更されたら、BFI_COUNTERを0に設定する。
(C)もし、サービングセルがSpCellであり、ランダムアクセス手順が成功裏に完了したら、BFI_COUNTERを0に設定し、ビーム失敗回復タイマー(beamFailureRecoveryTimer) が設定されていて走っているならば停止し、ビーム失敗回復手順が成功裏に完了したとみなす。そうでなく、もし、サービングセルがSCellで、SCellのビーム失敗回復のための情報(例えばSCellのBFR MAC CEまたはSCellのトランケートしたBFR MAC CEに含まれる情報)を送信するための、新しい上りリンクグラントを示すC-RNTIにアドレスされたPDCCHを受信したら、または、SCellが不活性状態であれば、BFI_COUNTERを0に設定し、ビーム失敗回復手順が成功裏に完了したとみなし、このサービングセルに対してトリガされたすべてのビーム失敗回復(BFR)をキャンセルする。
(A)もし、UL-SCHリソースが論理チャネルの優先度を考慮したうえでSCellのBFR MAC CEとそのサブヘッダを含めることができるのであれば、SCellのBFR MAC CEとそのサブヘッダを含める。そうでなければ、もし、UL-SCHリソースが論理チャネルの優先度を考慮したうえでSCellのトランケートしたBFR MAC CEとそのサブヘッダを含めることができるのであれば、SCellのトランケートしたBFR MAC CEとそのサブヘッダを含める。そうでなければ、SCellビーム失敗回復のためのスケジューリングリクエストをトリガする。
102 eNB
104 EPC
106 NR
108 gNB
110 5GC
112、114、116、118、120、124 インタフェース
122 UE
200、300 PHY
202、302 MAC
204、304 RLC
206、306 PDCP
208、308 RRC
310 SDAP
210、312 NAS
500、604 受信部
502、602 処理部
504、600 送信部
Claims (3)
- 基地局装置と通信する端末装置であって、
MCGとSCGを用いて通信する処理部と、
前記基地局装置からシグナリングを受信する受信部と、
を備え、
前記MCGは少なくともPCellを含み、
前記SCGは少なくともPSCellを含み、
前記処理部は、前記基地局装置から、前記SCGを不活性状態とすることを通知するシグナリングを受信した場合、前記SCGを不活性化し、
前記シグナリングに、前記SCGの不活性状態においてビーム失敗検出を行うことを示す情報が含まれるか否かを判断し、
前記シグナリングに、前記SCGの不活性状態において前記ビーム失敗検出を行うことを示す情報が含まれないと判断した場合、
前記処理部は、前記不活性化されたSCGのPSCellのBFI_COUNTERを0に設定する、
端末装置。 - 端末装置と通信する基地局装置であって、
前記端末装置と通信する処理部と、
前記端末装置にシグナリングを送信する送信部と、
を備え、
前記端末装置に設定されるSCGは少なくともPSCellを含み、
前記端末装置に前記SCGを不活性状態とすることを通知するシグナリングを送信することによって、前記端末装置に前記SCGを不活性化させ、
前記シグナリングに、前記SCGの不活性状態においてビーム失敗検出を行うことを示す情報が含まれるか否かを、前記端末装置に判断させ、
前記端末装置が、前記シグナリングに、前記SCGの不活性状態において前記ビーム失敗検出を行うことを示す情報が含まれないと判断した場合、
前記端末装置に、前記不活性化されたSCGのPSCellのBFI_COUNTERを0に設定させる、
基地局装置。 - 端末装置と通信する基地局装置の方法であって、
前記端末装置と通信を行い、
前記端末装置にシグナリングを送信し、
前記端末装置に設定されるSCGは少なくともPSCellを含み、
前記端末装置に前記SCGを不活性状態とすることを通知するシグナリングを送信することによって、前記端末装置に前記SCGを不活性化させ、
前記シグナリングに、前記SCGの不活性状態においてビーム失敗検出を行うことを示す情報が含まれるか否かを、前記端末装置に判断させ、
前記端末装置が、前記シグナリングに、前記SCGの不活性状態において前記ビーム失敗検出を行うことを示す情報が含まれないと判断した場合、
前記端末装置に、前記不活性化されたSCGのPSCellのBFI_COUNTERを0に設定させる、
方法。
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