JP2020014046A - Terminal device, base station device, method, and integrated circuit - Google Patents

Abstract

To provide a technology relating to a terminal device, a base station device, a method, and an integrated circuit capable of reducing the complexity of protocol processing and efficiently performing communication.SOLUTION: A terminal device includes a receiving unit that receives an RRC resetting message including a DRB setting from a base station, and a processing unit that sets an SDAP entity corresponding to a PDU session according to an SDAP setting when the value of the DRB identifier included in the DRB setting does not exist in the setting of the terminal device in a case in which the DRB setting includes the SDAP setting, associates the DRB established according to the DRB settings with the SDAP entity, and notifies the upper layer of the PDU session when the SDAP setting includes a QoS flow to be added, which is associated with the DRB corresponding to the value of the DRB identifier in a case in which the QoS flow identifier included in the QoS flow to be added does not exist in the setting of the terminal device.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a terminal device, a base station device, a method, and an integrated circuit.

  A wireless access method and a wireless network of cellular mobile communication (hereinafter, referred to as “Long Term Evolution (LTE: registered trademark)” or “Evolved Universal Terrestrial Radio Access: EUTRA”), and a core network (hereinafter, “Evolved”). "Packet Core: EPC") is being considered in a third generation partnership project (3GPP).

  In 3GPP, as radio access schemes and radio network technologies for the fifth generation cellular system, technical studies on LTE-Advanced Pro, an extension of LTE, and NR (New Radio technology), a new radio access technology And standards are being formulated (Non-Patent Document 1). In addition, 5GC (5 Generation Core Network), which is a core network for the fifth generation cellular system, is being studied (Non-Patent Document 2).

3GPP RP-170855, "Work Item on New Radio (NR) Access Technology" 3GPP TS 23.501, “System Architecture for the 5G System; Stage 2” 3GPP TS 36.300, “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); 3GPP TS 36.331, "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specifications" 3GPP TS 36.323, "Evolved Universal Terrestrial Radio Access (E-UTRA); Packet Data Convergence Protocol (PDCP) specification" 3GPP TS 36.322, "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Link Control (RLC) protocol specification" 3GPP TS 36.321, "Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification" 3GPP TS 37.374, "Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-Connectivity; Stage 2" 3GPP TS 38.300, "NR; NR and NG-RAN Overall description; Stage 2" 3GPP TS 38.331, "NR; Radio Resource Control (RRC); Protocol specifications" 3GPP TS 38.323, "NR; Packet Data Convergence Protocol (PDCP) specification" 3GPP TS 38.322, "NR; Radio Link Control (RLC) protocol specification" 3GPP TS 38.321, "NR; Medium Access Control (MAC) protocol specification" 3GPP TS 23.401 v14.3.0, "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) ac" 3GPP TS 23.502, "Procedure for 5G System; Stage 2" 3GPP TS 38.324, "NR; Service Data Adaptation Protocol (SDAP) specification"

  As one of technical studies on NR, a protocol of a wireless access layer for performing QoS (Quality of Service) management between an upper layer above an IP (Internet Protocol) layer and a wireless access layer of the NR is studied. ing.

  However, when QoS management between the upper layer and the wireless access layer is not performed correctly, there is a problem that communication between the base station device and the terminal device cannot be performed efficiently.

  One embodiment of the present invention has been made in view of the above circumstances, and a terminal device, a base station device, a method used for the terminal device, and a terminal device capable of efficiently performing communication with a base station device It is another object of the present invention to provide an integrated circuit mounted on a computer.

In order to achieve the above object, one embodiment of the present invention has the following means. That is, a terminal device that communicates with a base station device, a receiving unit that receives an RRC reconfiguration message including a radio bearer configuration information element from a base station, and a value of a radio bearer identifier information element included in the radio bearer configuration information element Is not present in the setting of the terminal device, and when the radio bearer setting information element includes the SDAP setting information element, the PDU session information element included in the SDAP setting information element is included in the setting of the terminal device. If not, establish a SDAP entity, configure a SDAP entity corresponding to the PDU session information element according to the SDAP configuration information element, associate a radio bearer established according to the radio bearer configuration information element with the SDAP entity, The radio bearer identification is included in the SDAP setting information element. Mapped to radio bearer corresponding to the value of the information element, Qo to add
If the SFlow information element is included and the QoS flow identifier information element included in the added QoS flow information element is not present in the setting of the terminal device, the PDU session information element is transmitted to an upper layer. And a processing unit for notifying.

  Another aspect of the present invention is a terminal device that communicates with a base station device, wherein the receiving unit receives an RRC reconfiguration message including a radio bearer configuration information element from the base station, and is included in the radio bearer configuration information element. If the value of the radio bearer identifier information element is present in the configuration of the terminal device, and if the radio bearer configuration information element includes an SDAP configuration information element, re-configure an LDAP entity according to the SDAP configuration information element. In the case where the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, the QoS flow included in the added QoS flow information element If the identifier information element is not present in the setting of the terminal device, it is included in the SDAP setting information element Notifying DU session information elements to the upper layer, and a processing unit.

  Further, one aspect of the present invention is a base station device that communicates with a terminal device, a transmitting unit that transmits an RRC reconfiguration message to the terminal device, and the RRC reconfiguration message includes a radio bearer configuration information element, A processing unit for causing a terminal device to perform processing, wherein the processing is performed when the value of the radio bearer identifier information element included in the radio bearer setting information element does not exist in the setting of the terminal device, the radio bearer If the setting information element includes an SDAP setting information element, and if the PDU session information element included in the SDAP setting information element does not exist in the setting of the terminal device, an SDAP entity is established; Configuring an SDAP entity corresponding to the PDU session information element according to the element, according to the radio bearer configuration information element The additional QoS flow information element, which associates the established radio bearer with the SDAP entity and associates the SDAP setting information element with the radio bearer corresponding to the value of the radio bearer identifier information element, When the QoS flow identifier information element included in the QoS flow information element to be performed does not exist in the setting of the terminal device, the process is a process of notifying the PDU session information element to an upper layer.

  Further, one aspect of the present invention is a base station device that communicates with a terminal device, a transmitting unit that transmits an RRC reconfiguration message to the terminal device, and the RRC reconfiguration message includes a radio bearer configuration information element, A processing unit that causes a terminal device to perform processing, wherein the processing is performed when the value of the radio bearer identifier information element included in the radio bearer setting information element is present in the setting of the terminal device; If the configuration information element includes an SDAP configuration information element, the SDAP entity is reconfigured according to the SDAP configuration information element, and the SDAP configuration information element is associated with a radio bearer corresponding to the value of the radio bearer identifier information element. , The QoS flow identification element included in the added QoS flow information element when the QoS flow information element to be added is included. Information elements, in the absence of the setting of the terminal device is a process of notifying the PDU session information elements included in the SDAP setting information elements to the upper layer.

Another aspect of the present invention is a method of a terminal device communicating with a base station device, comprising: receiving an RRC reconfiguration message including a radio bearer configuration information element from a base station; If the value of the bearer identifier information element is not present in the setting of the terminal device, and if the radio bearer setting information element includes the SDAP setting information element, the PDU session information element included in the SDAP setting information element is If not present in the configuration of the terminal device, establish a SDAP entity, set the SDAP entity corresponding to the PDU session information element according to the SDAP configuration information element, and establish the radio bearer established according to the radio bearer configuration information element Associating with the SDAP entity, the SD
When the AP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, the QoS flow identifier information included in the added QoS flow information element If the element is not present in the settings of the terminal device, the PDU session information element is notified to an upper layer.

  Another aspect of the present invention is a method of a terminal device communicating with a base station device, comprising: receiving an RRC reconfiguration message including a radio bearer configuration information element from a base station; If the value of the bearer identifier information element is present in the configuration of the terminal device, and if the radio bearer configuration information element includes the SDAP configuration information element, reconfigure the SDAP entity according to the SDAP configuration information element, When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device, the PD included in the SDAP setting information element To notify the session information element to the upper layer.

  Another aspect of the present invention is a method of a base station apparatus communicating with a terminal apparatus, wherein the base station apparatus transmits an RRC reconfiguration message to the terminal apparatus, the RRC reconfiguration message includes a radio bearer configuration information element, If the value of the radio bearer identifier information element included in the bearer configuration information element does not exist in the setting of the terminal device, and if the radio bearer configuration information element includes the SDAP configuration information element, the SDAP configuration information element If the PDU session information element included in the PDU session information element is not present in the setting of the terminal device, an SDAP entity is established, and the SDAP entity corresponding to the PDU session information element is set according to the SDAP setting information element. Associating the radio bearer established according to the information element with the SDAP entity, When the DAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, the QoS flow identifier information included in the added QoS flow information element If the element does not exist in the setting of the terminal device, the terminal device is caused to perform a process of notifying the PDU session information element to an upper layer.

  Another aspect of the present invention is a base station device that communicates with a terminal device, wherein the base station device transmits an RRC reconfiguration message to the terminal device, the RRC reconfiguration message includes a radio bearer configuration information element, and the radio bearer configuration If the value of the radio bearer identifier information element included in the information element is present in the setting of the terminal device, and if the radio bearer setting information element includes the SDAP setting information element, the Re-establishing an entity, wherein the SDAP configuration information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element; If the QoS flow identifier information element included in the The process of notifying the PDU session information elements included in the constant information element to the upper layer causes the terminal device.

  Note that these comprehensive or specific aspects may be realized by a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, and the system, the apparatus, the method, the integrated circuit, the computer program, and the recording medium May be realized by any combination.

  According to one embodiment of the present invention, the terminal device can reduce the complexity of the protocol processing and perform efficient communication.

1 is a schematic diagram of a communication system according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a protocol stack of UP and CP of a terminal device and a base station device in E-UTRA according to the embodiment of the present invention. FIG. 4 is a diagram illustrating a protocol stack of UP and CP of a terminal device and a base station device in NR in the embodiment of the present invention. FIG. 4 is a diagram showing an example of a flow of an RRC connection reset procedure in the embodiment of the present invention. FIG. 1 is a block diagram showing a configuration of a terminal device according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a configuration of a base station device according to the embodiment of the present invention. Information related to radio bearer setting according to the embodiment of the present invention, and ASN. FIG. 1 is a diagram showing an example of a description of 1 (Abstract Syntax Notation One). 1 shows an example of a processing method according to an embodiment of the present invention. 9 shows another example of the processing method according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  LTE (and LTE-A Pro) and NR may be defined as different RATs. Also, NR may be defined as a technology included in LTE. LTE may be defined as a technology included in NR. In addition, LTE connectable with NR and Multi RAT Dual connectivity may be distinguished from conventional LTE. This embodiment may be applied to NR, LTE and other RATs. The following description will be made using terms related to LTE and NR, but may be applied in other technologies using other terms. Further, the term E-UTRA in the present embodiment may be replaced with the term LTE, and the term LTE may be replaced with the term E-UTRA.

  FIG. 1 is a schematic diagram of a communication system according to each embodiment of the present invention.

  E-UTRA100 is a radio access technology described in Non-Patent Document 3 and the like, and includes a cell group (Cell Group: CG) configured by one or a plurality of frequency bands. The eNB (E-UTRAN Node B) 102 is an E-UTRA base station device. Evolved Packet Core (EPC) 104 is a core network described in Non-Patent Document 14 and the like, and is designed as a core network for E-UTRA. The interface 112 is an interface between the eNB 102 and the EPC 104, and includes a control plane (Control Plane: CP) through which a control signal passes and a user plane (User Plane: UP) through which the user data passes.

  The NR 106 is a radio access technology described in Non-Patent Document 9 and the like, and is composed of a cell group (Cell Group: CG) configured with one or a plurality of frequency bands. The gNB (g Node B) 108 is an NR base station device. The 5GC 110 is a core network described in Non-Patent Document 2 and the like, and is designed as an NR core network, but may be used as an E-UTRA core network having a function of connecting to 5CG. Hereinafter, E-UTRA may include E-UTRA having a function of connecting to 5CG.

An interface 114 is an interface between the eNB 102 and the 5GC 110, an interface 116 is an interface between the gNB 108 and the 5GC 110, an interface 118 is an interface between the gNB 108 and the EPC 104, an interface 120 is an interface between the eNB 102 and the gNB 108, and an interface 124 is an EPC 104 and the 5GC 110 Interface between the two. Interface 114, interface 116,
The interface 118, the interface 120, and the interface 124 are interfaces that pass only the CP, only the UP, or both the CP and the UP. The interface 114, the interface 116, the interface 118, the interface 120, and the interface 124 may not exist depending on the communication system provided by the communication carrier.

  The UE 122 is a terminal device that supports NR or that supports both E-UTRA and NR.

  FIG. 2 is a diagram illustrating a protocol stack of UP and CP of a terminal device and a base station device in an E-UTRA radio access layer according to each embodiment of the present invention.

  FIG. 2A is a UP protocol stack diagram used when the UE 122 communicates with the eNB 102.

A PHY (Physical layer) 200 is a wireless physical layer (wireless physical layer), and provides a transmission service to an upper layer (upper layer) using a physical channel (Physical Channel). The PHY 200 is a high-order MAC (Medium) described later.
Access Control layer 202 is connected to a transport channel. Data moves between the MAC 202 and the PHY 200 via the transport channel. Data transmission / reception is performed between the UE 122 and the PHY of the eNB 102 via the radio physical channel.

  The MAC 202 is a medium access control layer that maps various logical channels (Logical Channels) to various transport channels. The MAC 202 is connected to a higher-level RLC (Radio Link Control layer) 204 described later by a logical channel. Logical channels are roughly classified according to the type of information to be transmitted, and are divided into control channels for transmitting control information and traffic channels for transmitting user information. The MAC 202 has a function of controlling the PHY 200 to perform intermittent transmission (DRX / DTX), a function of executing a random access (Random Access) procedure, a function of notifying transmission power information, a function of performing HARQ control, and the like. (Non-Patent Document 7).

  The RLC 204 divides data (segmentation) received from a higher-order packet data convergence protocol layer (PDCP) 206 described later, and adjusts the data size so that the lower layer (lower layer) can appropriately transmit data. Wireless link control layer (wireless link control layer). The RLC 200 also has a function for guaranteeing QoS (Quality of Service) required by each data. That is, the RLC 204 has functions such as data retransmission control (Non-Patent Document 6).

  The PDCP 206 is a packet data convergence protocol layer (packet data convergence protocol layer) for efficiently transmitting an IP packet (IP Packet) as user data in a wireless section. The PDCP 206 may have a header compression function for compressing unnecessary control information. The PDCP 206 may also have a data encryption function (Non-Patent Document 5).

The data processed in the MAC 202, the RLC 204, and the PDCP 206 are called a MAC PDU (Protocol Data Unit), an RLC PDU, and a PDCP PDU, respectively. Also, the data passed from the upper layer to the MAC 202, the RLC 204, and the PDCP 206, or the data passed to the upper layer, is described by a MAC SDU (Se
device data unit), RLC SDU, and PDCP SDU.

  FIG. 2B is a protocol stack diagram of a CP used when the UE 122 communicates with the eNB 102.

  The CP protocol stack includes an RRC (Radio Resource Control layer) 208 in addition to the PHY 200, the MAC 202, the RLC 204, and the PDCP 206. The RRC 208 is a radio link control layer (radio link control layer) that performs setting and resetting of a radio bearer (Radio Bearer: RB) and controls a logical channel, a transport channel, and a physical channel. The RB may be divided into a signaling radio bearer (Signaling Radio Bearer: SRB) and a data radio bearer (Data Radio Bearer: DRB), and the SRB is used as a path for transmitting an RRC message as control information. You may. DRB may be used as a route for transmitting user data. Each RB may be set between the eNB 102 and the RRC 208 of the UE 122 (Non-Patent Document 4).

  The above-described function classification of the MAC 202, the RLC 204, the PDCP 206, and the RRC 208 is an example, and some or all of the functions may not be implemented. In addition, some or all of the functions of each layer may be included in another layer.

  Note that an IP layer, a Transmission Control Protocol (TCP) layer above the IP layer, a User Datagram Protocol (UDP) layer, and an application layer are layers higher than the PDCP layer (not shown). Further, the RRC layer and the NAS (non Access Stream) layer are also upper layers of the SDAP layer (not shown). In other words, the PDCP layer is an RRC layer, a NAS layer, an IP layer, a Transmission Control Protocol (TCP) layer above the IP layer, a UDP (User Datagram Protocol) layer, and a lower layer of an application layer.

  FIG. 3 is a diagram showing a protocol stack of the terminal device and the base station device in the NR radio access layer according to each embodiment of the present invention.

  FIG. 3A is a UP protocol stack diagram used when the UE 122 communicates with the gNB 108.

  The PHY (Physical layer) 300 is a wireless physical layer (wireless physical layer) of the NR, and may provide a transmission service to an upper layer by using a physical channel (Physical Channel). The PHY 300 may be connected to a higher-order MAC (Medium Access Control layer) 302 to be described later via a transport channel (Transport Channel). Data may move between MAC 302 and PHY 300 via a transport channel. Data transmission and reception may be performed between the UE 122 and the PHY of the gNB 108 via a radio physical channel.

The MAC 302 is a medium access control layer that maps various logical channels (Logical Channels) to various transport channels. The MAC 302 may be connected to a higher-level RLC (Radio Link Control layer) 304 described later by a logical channel. The logical channel is largely divided according to the type of information to be transmitted, and may be divided into a control channel for transmitting control information and a traffic channel for transmitting user information. The MAC 302 has a function of controlling the PHY 300 to perform intermittent transmission (DRX / DTX), a function of executing a random access (Random Access) procedure, a function of notifying transmission power information, a function of performing HARQ control, and the like. You may have it (Non-Patent Document 13).

  The RLC 304 divides data (segmentation) received from a higher-level packet data convergence protocol layer (PDCP) 206 described later, and adjusts the data size so that the lower layer can appropriately transmit data. Layer (radio link control layer). The RLC 304 may also have a function for guaranteeing the QoS (Quality of Service) required by each data. That is, the RLC 304 may have a function such as data retransmission control (Non-Patent Document 12).

  The PDCP 306 is a packet data convergence protocol layer (a packet data convergence protocol layer) for efficiently transmitting an IP packet (IP Packet) as user data in a wireless section. The PDCP 306 may have a header compression function for compressing unnecessary control information. The PDCP 306 may also have a data encryption function (Non-Patent Document 11).

An SDAP (Service Data Adaptation Protocol) 310 associates a downlink QoS flow sent from a core network to a terminal device via a base station device with a DRB (mapping), and transmits the downlink QoS flow from the terminal device via the base station device. A service data adaptation protocol layer (service data adaptation protocol layer) having a function of mapping an uplink QoS flow sent to a core network to a DRB and storing mapping rule information (Non-Patent Document 16) ). When the terminal device receives the SDAP SDU together with the QoS flow information from the upper layer, the terminal device allocates the SDAP SDU to the corresponding DRB based on a mapping rule between the stored QoS flow and the DRB. When the mapping rule between the QoS flow and the DRB is not stored, the SDAP SDU may be assigned to the default radio bearer (default DRB). A QoS flow is composed of one or a plurality of service data flows (Service Data Flows: SDFs) that are processed according to the same QoS policy (Non-Patent Document 2). Also, the SDAP may have a reflective QoS (Reflective QoS) function of mapping the uplink QoS flow and the DRB based on the information of the downlink QoS flow. Further, when the association rule between the QoS flow and the DRB is changed, an end marker (End Marker) is created and transmitted to the DRB before the change, so that the SAP SDUs are delivered in order (in-sequence).
delivery may be guaranteed (Non-Patent Documents 2 and 16).

  Note that an IP layer, a Transmission Control Protocol (TCP) layer above the IP layer, a User Datagram Protocol (UDP) layer, an application layer, and the like are upper layers (not shown) of the SDAP layer. Further, the RRC layer and the NAS (non Access Stream) layer are also upper layers of the SDAP layer (not shown). In the NAS layer, association between the service data flow and the QoS flow is performed. In other words, the SDAP layer is a lower layer of the RRC layer, the NAS layer, the IP layer, the Transmission Control Protocol (TCP) layer above the IP layer, the User Datagram Protocol (UDP) layer, and the application layer.

The data processed in the MAC 302, the RLC 304, the PDCP 306, and the SDAP 310 are referred to as MAC PDUs (Protocol Data Units).
, RLC PDU, PDCP PDU, and SDAP PDU. Also, the data passed from the upper layer to the MAC 202, the RLC 204, and the PDCP 206 or the data passed to the upper layer may be called a MAC SDU (Service Data Unit), an RLC SDU, a PDCP SDU, and a SDAP SDU, respectively.

  FIG. 3B is a protocol stack diagram of a CP used when the UE 122 communicates with the gNB 108.

  In the protocol stack of the CP, there is an RRC (Radio Resource Control layer) 308 in addition to the PHY 300, the MAC 302, the RLC 304, and the PDCP 306. The RRC 308 is a radio link control layer (radio link control layer) that performs setting and resetting of a radio bearer (Radio Bearer: RB) and controls a logical channel, a transport channel, and a physical channel. The RB may be divided into a signaling radio bearer (Signaling Radio Bearer: SRB) and a data radio bearer (Data Radio Bearer: DRB), and the SRB is used as a path for transmitting an RRC message as control information. You may. DRB may be used as a route for transmitting user data. Each RB may be set between the gNB 108 and the RRC 308 of the UE 122. Further, a portion of the RB configured by the RLC 304 and the MAC 302 may be called an RLC bearer (Non-Patent Document 10).

  The above-described function classification of the MAC 302, the RLC 304, the PDCP 306, the SDAP 310, and the RRC 308 is an example, and some or all of the functions may not be implemented. In addition, some or all of the functions of each layer (each layer) may be included in another layer (layer).

  In each embodiment of the present invention, the MAC 202, RLC 204, PDCP 206, and RRC 208 will be referred to as E-UTRA MAC or LTE MAC, E-UTRA RLC for LTE or LTE, PDCP for E-UTRA or PDCP for LTE, and RRC for E-UTRA or RRC for LTE. Also, the MAC 302, the RLC 304, the PDCP 306, and the RRC 308 may be referred to as an NR MAC, an NR RLC, an NR RLC, and an NR RRC, respectively. Alternatively, the space may be described using spaces such as E-UTRA PDCP, LTE PDCP, and NR PDCP.

  Further, as shown in FIG. 1, the eNB 102, the gNB 108, the EPC 104, and the 5GC 110 may be connected via an interface 112, an interface 116, an interface 118, an interface 120, and an interface 114. Therefore, in order to support various communication systems, the RRC 208 of FIG. 2 may be replaced with the RRC 308 of FIG. Further, the PDCP 206 in FIG. 2 may be replaced with the PDCP 306 in FIG. Further, the RRC 308 in FIG. 3 may include the function of the RRC 208 in FIG. Further, the PDCP 306 in FIG. 3 may be the PDCP 206 in FIG.

(Embodiment)
An embodiment of the present invention will be described with reference to FIGS.

  FIG. 4 is a diagram showing an example of the flow of the RRC resetting procedure in the embodiment of the present invention. In addition. The RRC reset procedure may be an RRC connection reset procedure.

The RRC reconfiguration procedure (RRC Reconfiguration) includes establishing, changing, and releasing an RB in an NR, changing and releasing a secondary cell, and performing handover (reconfiguration with synchronization) described in Non-Patent Document 10. And a procedure used for measurement and the like. On the other hand, RRC connection reconfiguration procedure (RRC Connection Reconfiguration) described in Non-Patent Document 4 establishes, changes, and releases RBs in LTE, and changes and releases secondary cells, and also performs handover and measurement (Measurement) and the like. This is the procedure used for The RRC connection reset procedure is an MR-DC, particularly an EN-DC (E-UTRA-NR) that is an MR-DC when the core network is the EPC 104 and the master node is the eNB 102.
In NGEN-DC (NG-RAN E-UTRA-NR Dual Connectivity), which is an MR-DC when the core network is 5GC110 and the master node is the eNB102, the core network is 5GC110 and the core network is 5GC110. In the case of the extended eNB 102 to be connected, the RRC connection re-establishment procedure includes not only the LTE but also the establishment, change, and release of the RB in the NR and the change and release of the secondary cell described in Non-Patent Document 10. In addition to performing a part of the above, it is also used to perform a part of a handover and a measurement (Measurement). In each embodiment of the present invention, in order to avoid complicating the description, the description will be made using the name of RRC reconfiguration procedure, and the description will be made using gNB 108 as the base station apparatus.

  In the RRC reconfiguration procedure, the UE 122 receives an RRC reconfiguration message (RRCReconfiguration) from the gNB 108 (step S400), and performs various settings according to information included in the RRC reconfiguration message, such as a radio bearer setting and an SDAP setting. Is performed (step S402). After step S1602, the UE 122 may send an RRC reconfiguration completion message (RRCReconfigurationComplete) or the like to the gNB 108 (not shown). Note that the RRC reconfiguration message may be rephrased as RRC reconfiguration, and the RRC reconfiguration complete message may be rephrased as RRC reconfiguration complete.

  FIG. 5 is a block diagram illustrating a configuration of the terminal device (UE 122) according to the embodiment of the present invention. In addition, in order to avoid complicating the description, FIG. 5 shows only main components that are closely related to the present invention.

  The UE 122 illustrated in FIG. 5 includes a receiving unit 500 that receives an RRC reconfiguration message and the like from the gNB 108, and a processing unit 502 that performs processing according to various information elements (IE: Information Element) and various conditions included in the received message. .

  FIG. 6 is a block diagram showing a configuration of the base station apparatus (gNB 108) according to the embodiment of the present invention. Note that FIG. 6 shows only main components closely related to the present invention, in order to avoid a complicated description.

  The gNB 108 illustrated in FIG. 6 generates a transmission unit 600 that transmits an RRC reconfiguration message and the like to the UE 122 and an RRC reconfiguration message including various information elements (IEs), and transmits the generated RRC reconfiguration message to the UE 122. The processing unit 602 causes the processing unit 502 to perform processing. Note that the configuration illustrated in FIG. 7 may be applied to the eNB 102. When applied to the eNB 102, the message transmitted from the transmitting unit 700 to the UE 122 may be an RRC connection reconfiguration message.

FIG. 7 is a diagram illustrating an example of ASN.4 representing an information element included in the RRC reconfiguration message in FIG. 1 (Abstract Syntax Notation One). In 3GPP, specifications related to RRC (Non-Patent Document 4 and Non-Patent Document 10) include messages related to RRC, information elements (Information Element: IE), and the like as ASN. This is described using 1. The ASN. In the example of <1>, <abbreviation> and <omission> are ASN. It is not part of the notation of 1 but indicates that other information is omitted. It should be noted that even where there is no description of <omitted> or <omitted>, the information element may be omitted. Note that the ASN. 1 is ASN. It does not follow the one notation method correctly, but is an example of RRC reset parameters in the present invention, and other names or other notations may be used. Also, the ASN. The first example shows only an example relating to main information closely related to the present invention in order to avoid a complicated description.

  The information element represented by DRB-ToAddModList or DRBToAddMod in FIG. 7 may be a list of information indicating the setting of a DRB (data radio bearer) to be added or changed, and in the embodiment of the present invention, the radio bearer setting information Element or data radio bearer information element.

  Among the radio bearer setting information elements, the information element represented by DRB-Identity is information on the DRB identifier of the DRB to be added or changed, and in the embodiment of the present invention, the radio bearer identifier information element or the data radio bearer It may be rephrased as an identifier information element. In the example of FIG. 7, an integer value of 1 to 32 is used, but another value may be used. For DC, the DRB identifier is unique within the scope of UE 122.

  The information element represented by cnAssociation in the radio bearer setting information element may be an information element indicating whether to use the EPC 104 or the 5GC 110 for the core network. It may be rephrased as an association information element. That is, when the UE 122 connects to the EPC, the DRB is associated with the EPS bearer identifier information element (eps-BearerIdentity) during cnAssociation or the EPS bearer identifier that is the value of the EPS bearer identifier information element, and the UE 122 connects to the 5GC 110. In doing so, the DRB is defined by a value of a later-described PDU session information element or a PDU session information element included in the SDAP entity or the SDAP configuration information element set according to the later-described SDAP setting information element (sdap-Config). It may be associated with a certain PDU session identifier. That is, the information represented by cnAssociation includes an EPS bearer identifier information element (eps-BearerIdentity) when the EPC 104 is used for the core network, and an information element (sdap-Config) indicating the SDAP setting when the core network 5GC110 is used. ) May be included.

  The information element represented by sdap-Config may be information on setting or resetting of an SDAP entity that determines a method of mapping a QoS flow and a DRB when the core network is 5GC110, In the embodiment of the present invention, it may be rephrased as an SDAP setting information element.

  The information element indicated by pdu-session or PDU-SessionID included in the SDAP setting information element is a radio bearer corresponding to the value of the radio bearer identifier information element included in the radio bearer setting information element including the present SDAP setting information element. The identifier of the PDU session described in Non-Patent Document 2 to which the QoS flow assigned to (map) belongs may be referred to. In the embodiment of the present invention, it may be rephrased as a PDU session information element. The value of the PDU session information element may be a non-negative integer.

The information element indicated by mappedQoS-FlowsToAdd included in the SDAP setting information element corresponds to the radio bearer corresponding to the value of the radio bearer identifier information element included in the radio bearer setting information element including the present SDAP setting information element (map ) Or information indicating a list of QoS Flow Identifier (QFI: QoS Flow Identity) information elements of the QoS flows to be added (mapped), which will be added in the embodiment of the present invention. It may be paraphrased as a QoS flow information element. The above-mentioned QoS flow may be a QoS flow of the PDU session indicated by the PDU session information element included in the present SDAP setting information element.

  The information element indicated by mappedQoS-FlowsToRelease included in the SDAP setting information element corresponds to the radio bearer corresponding to the value of the radio bearer identifier information element included in the radio bearer setting information element including the present SDAP setting information element. The information may be information indicating a list of QoS Flow Identifier (QFI: QoS Flow Identity) information elements of a QoS flow for which the correspondence is released among (mapped) QoS flows, according to an embodiment of the present invention. In some embodiments, it may be rephrased as a QoS flow information element to be released. The above-mentioned QoS flow may be a QoS flow of the PDU session indicated by the PDU session information element included in the present SDAP setting information element.

  The information element indicated by QFI may be a QoS flow identifier that uniquely identifies a QoS flow described in Non-Patent Document 2, and may be rephrased as a QoS flow identifier information element in the embodiment of the present invention. The value of the QoS flow identifier information element may be a non-negative integer. Also, the value of the QoS flow identifier information element may be unique for the PDU session.

  The SDAP setting information element further includes an uplink header information element indicating that an uplink header exists, a downlink header information element indicating that a downlink header exists, a default radio bearer (default DRB). ) May be included.

  In the radio bearer setting information element, the information element represented by pdcp-Config or PDCP-Config may be information on setting of the NR PDCP entity for establishing or changing the PDCP 306 for SRB or DRB. Often, in the embodiment of the present invention, it may be referred to as a PDCP setting information element. The information related to the setting of the NR PDCP entity includes information indicating the size of the uplink sequence number, information indicating the size of the downlink sequence number, information indicating a profile of header compression (RoHC: RObust Header Compression), and reordering (RoHC: Robust Header Compression). re-ordering) timer information and the like may be included.

  In the radio bearer setting information element, the information element represented by DRB-ToReleaseList may be list information of the DRB identifier of the DRB to be released, and in the embodiment of the present invention, the radio bearer information element to be released, Or, it may be paraphrased as a data radio bearer information element to be released.

  Some or all of the information elements shown in FIG. 7 may be optional. That is, the information elements shown in FIG. 7 may be included in the RRC reset message as needed.

  An example of a processing method of UE 122 in the embodiment of the present invention will be described with reference to FIG.

  The processing unit 602 of the gNB 108 creates an RRC reconfiguration message including a radio bearer configuration information element for causing the UE 122 to perform processing, and transmits the RRC reconfiguration message from the transmission unit 600 to the UE 122 (not shown). The receiving unit 500 of the UE 122 receives the RRC reconfiguration message from the gNB 108 (Step S800). Note that the UE 122 may receive an RRC message including the above-described radio bearer setting information element from the eNB 102, and the RRC message in this case may be referred to as an RRC connection re-establishment message.

Next, the processing unit 502 of the UE 122 confirms that the value of the radio bearer identifier information element included in the above-described radio bearer setting information element is not present in the current setting of the UE 122. Further, it is confirmed that the above-mentioned radio bearer setting information element includes the SDAP setting information element (step S802).

  In step 802, the value of the radio bearer identifier information element included in the above-described radio bearer configuration information element is not present in the current setting of the UE 122, and the above-mentioned radio bearer configuration information element includes the SDAP configuration information element. If confirmed, the processing unit 502 of the UE 122 then confirms whether the value of the PDU session information element or the PDU session information element included in the above-described SDAP setting information element is present in the current setting of the UE 122 or not. However, if there is no such entity, it is determined that the SDAP entity for the PDU session indicated by the PDU session information element has not been established, and the SDAP entity is established (step S804). If the value of the above PDU session information element or the value of the PDU session information element is present in the current setting of the UE 122, it is determined that the LDAP entity for the PDU session indicated by the above PDU session information element has already been established, and the No entity is established.

  Next, the processing unit 502 of the UE 122 sets the SDAP entity corresponding to the above-mentioned PDU session information element according to the above-mentioned SDAP setting information element, and further sets the radio bearer established according to the above-mentioned radio bearer setting element to the above-mentioned SDAP entity. (Step S806).

  Next, the processing unit 502 of the UE 122 includes, in the above-mentioned SDAP setting information element, a QoS flow information element to be added, which corresponds to the above-mentioned radio bearer, that is, the radio bearer corresponding to the value of the above-mentioned radio bearer identifier information element. Check if it is. In the case where it is included, the value of the QoS flow identifier information element that is not present in the current setting of the UE 122 or the value of the QoS flow identifier information element is included in the QoS identifier information element included in the above-described added QoS flow information element. If so, the upper layer is notified that “user-plane resources for the PDU session corresponding to the PDU session information element described above have been established”. “The user plane resource for the PDU session corresponding to the above-mentioned PDU session information element has been established” means “the above-mentioned QoS flow identifier information element that does not exist in the current setting of the UE 122 or the value of the QoS flow identifier information element. That the corresponding rule between the corresponding QoS flow and the radio bearer has been stored. "

  To notify that "a user plane resource for a PDU session corresponding to the above-mentioned PDU session information element has been established" means, for example, notifying the above-mentioned PDU session identifier information element or the value of the PDU session identifier information element to an upper layer. It may be a thing. At this time, the new QoS flow identifier information element or the value of the new information element may be notified to the upper layer at the same time, or the value of the PDU session identifier information element or the value of the PDU session identifier information element Instead of notifying the upper layer, the new QoS flow identifier information element or the value of the new information element may be notified to the upper layer (step S808).

If the above-mentioned SDAP setting information element does not include the QoS flow information element to be added, the information indicating that “the user plane resource for the PDU session corresponding to the above-mentioned PDU session information element has been established” is sent to the upper layer. No notification is given. Further, even when the above-mentioned SDAP setting information element includes a QoS flow information element to be added, all the QoS identifier information elements included in the above-described QoS flow information element or the values of all the QoS identifier information elements are If the QoS setting information element does not include the QoS flow information element to be added when the current setting of the UE 122 is present, the "PDU session corresponding to the PDU session information element described above" is sent to the upper layer. Notification that the user plane resource has been established for.

  Note that, in step S808, “the QoS identifier information element included in the above-described QoS flow information element includes a QoS flow identifier information element that does not exist in the current setting of the UE 122 or a value of the QoS flow identifier information element. The case may be paraphrased as "when the QoS identifier information element included in the above-described QoS flow information element includes a new QoS flow identifier information element or a value of a new QoS flow identifier information element." good.

  Another example of the processing method of UE 122 in the embodiment of the present invention will be described using FIG.

  The processing unit 602 of the gNB 108 creates an RRC reconfiguration message including a radio bearer configuration information element for causing the UE 122 to perform processing, and transmits the RRC reconfiguration message from the transmission unit 600 to the UE 122 (not shown). The receiving unit 500 of the UE 122 receives the RRC reconfiguration message from the gNB 108 (Step S900). Note that the UE 122 may receive an RRC message including the above-described radio bearer setting information element from the eNB 102, and the RRC message in this case may be referred to as an RRC connection re-establishment message.

  Next, the processing unit 502 of the UE 122 confirms that the value of the radio bearer identifier information element included in the above-described radio bearer setting information element is in the current setting of the UE 122. Further, it is confirmed that the above-mentioned radio bearer setting information element includes the SDAP setting information element (step S902).

  In step 902, the value of the radio bearer identifier information element included in the above-described radio bearer configuration information element is present in the current setting of the UE 122, and the above-mentioned radio bearer configuration information element includes the SDAP configuration information element. If confirmed, then the processing unit 502 of the UE 122 sets or resets the SDAP entity corresponding to the PDU session information element included in the above-mentioned SDAP setting information element according to the above-mentioned SDAP setting information element ( Step S904).

  Next, the processing unit 502 of the UE 122 includes, in the above-mentioned SDAP setting information element, a QoS flow information element to be added, which corresponds to the above-mentioned radio bearer, that is, the radio bearer corresponding to the value of the above-mentioned radio bearer identifier information element. Check if it is. In the case where it is included, the value of the QoS flow identifier information element that is not present in the current setting of the UE 122 or the value of the QoS flow identifier information element is included in the QoS identifier information element included in the above-described added QoS flow information element. If so, the upper layer is notified that “user-plane resources for the PDU session corresponding to the PDU session information element described above have been established”. “The user plane resource for the PDU session corresponding to the above-mentioned PDU session information element has been established” means “the above-mentioned QoS flow identifier information element that does not exist in the current setting of the UE 122 or the value of the QoS flow identifier information element. That the corresponding rule between the corresponding QoS flow and the radio bearer has been stored. "

To notify that "a user plane resource for a PDU session corresponding to the above-mentioned PDU session information element has been established" means, for example, notifying the above-mentioned PDU session identifier information element or the value of the PDU session identifier information element to an upper layer. It may be a thing. At this time, the new QoS flow identifier information element or the value of the new information element may be notified to the upper layer at the same time, or the value of the PDU session identifier information element or the value of the PDU session identifier information element Instead of notifying the upper layer, the above-described new QoS flow identifier information element or the value of the new information element may be notified to the upper layer (step S906).

  If the above-mentioned SDAP setting information element does not include the QoS flow information element to be added, the information indicating that “the user plane resource for the PDU session corresponding to the above-mentioned PDU session information element has been established” is sent to the upper layer. No notification is given. Even when the above-mentioned SDAP setting information element includes a QoS flow information element to be added, the values of all the QoS identifier information elements or the values of all the QoS identifier information elements included in the above-mentioned added QoS flow information element Is present in the current setting of the UE 122, if the above-mentioned SDAP setting information element does not include the QoS flow information element to be added, the upper layer is referred to as “corresponding to the above-mentioned PDU session information element”. Notification that the user plane resource for the PDU session has been established "is not performed.

  Note that, in step S906, “the QoS identifier information element included in the above-described QoS flow information element includes a QoS flow identifier information element that does not exist in the current setting of the UE 122 or a value of the QoS flow identifier information element. The case may be paraphrased as "when the QoS identifier information element included in the above-described QoS flow information element includes a new QoS flow identifier information element or a value of a new QoS flow identifier information element." good.

  Note that the processing of step S808 or step S906 may be performed by the RRC 308 or RRC 208, or may be performed by the SDAP 310. In the processing of step S808 or step S906, the upper layer may be a NAS layer. In addition, the notification to the upper layer in the processing of step S808 or step S906 is performed in the SDAP 310 by the QoS flow identifier information element or the QoS flow identifier information included in the above-mentioned radio bearer configuration information element and not present in the current configuration of the UE 122. The fact that the association rule between the QoS flow corresponding to the value of the element and the radio bearer is stored may be confirmed by the RRC 308 or the RRC 208 and then performed. The above-described method of confirming that the association rule has been stored may be a notification from the SDAP 310 to the RRC 308 or RRC 208 indicating that the association rule has been stored.

  As described above, in the embodiment of the present invention, when a QoS flow that is not presently set in the UE 122 is associated with the DRB, the upper layer is notified to establish a user plane resource for the PDU session in the lower layer. The user data can be transmitted at an optimal timing. That is, the terminal device can reduce the complexity of the protocol processing and can communicate efficiently.

  Note that the radio bearer configuration in each embodiment of the present invention may be included not only in the RRC connection reconfiguration procedure, but also in the RRC establishment (RRC Establishment) procedure or the RRC re-establishment (RRC Re-establishment) procedure. . Further, the radio bearer in each embodiment of the present invention may be a DRB or an SRB.

  The program that operates on the device according to the present invention may be a program that controls a Central Processing Unit (CPU) or the like to cause the computer to function so as to realize the functions of the above-described embodiment according to the present invention. . The program or information handled by the program is temporarily read into a volatile memory such as a random access memory (RAM) at the time of processing, or is stored in a non-volatile memory such as a flash memory or a hard disk drive (HDD). In response, reading, correction and writing are performed by the CPU.

Note that a part of the device in the above-described embodiment may be realized by a computer. In that case, a program for realizing this control function is recorded on a computer-readable recording medium, and the program recorded on this recording medium is read and executed by a computer system. Is also good. Here, the "computer system" is a computer system built in the apparatus 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.

  Furthermore, a "computer-readable recording medium" refers to a dynamic storage of a program for a short 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. For example, a volatile memory in a computer system serving as a server or a client in that case may include a program that holds a program for a certain period of time. The above-mentioned program may be for realizing a part of the above-mentioned functions, or may be for realizing the above-mentioned functions in combination with a program already recorded in a computer system. .

  Further, each functional block or various features of the device used in the above-described embodiment may be implemented or executed by an electric circuit, that is, typically, an integrated circuit or a plurality of integrated circuits. An electrical circuit designed to perform the functions described herein may be a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA), or other Logic devices, discrete gate or transistor logic, discrete hardware components, or a combination thereof. A general purpose processor may be a microprocessor, or, in the alternative, the processor may be a conventional processor, controller, microcontroller, or state machine. The general-purpose processor or each of the above-described circuits may be configured by a digital circuit, or may be configured by an analog circuit. Further, in the case where a technology for forming an integrated circuit that substitutes for a current integrated circuit appears due to the progress of semiconductor technology, an integrated circuit based on the technology can be used.

  Note that the present invention is not limited to the above embodiment. In the embodiment, an example of the device is described. However, the present invention is not limited to this, and stationary or non-movable electronic devices installed indoors and outdoors, for example, AV devices, kitchen devices, It can be applied to terminal devices or communication devices such as cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other living equipment.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes a design change or the like without departing from the gist of the present invention. Further, the present invention can be variously modified within the scope shown in the claims, and the technical scope of the present invention includes embodiments obtained by appropriately combining technical means disclosed in different embodiments. It is. Further, the components described in the above-described embodiment also include a configuration in which components having the same effects are replaced with each other.

100 E-UTRA
102 eNB
104 EPC
106 NR
108 gNB
110 5GC
112, 114, 116, 118, 120, 124 interface 122 UE
200, 300 PHY
202, 302 MAC
204, 304 RLC
206, 306 PDCP
208, 308 RRC
310 SDAP
500 receiving unit 502, 602 processing unit 600 transmitting unit

Claims (8)

A terminal device that communicates with a base station device,
A receiving unit that receives an RRC reconfiguration message including a radio bearer configuration information element from the base station;
When the value of the radio bearer identifier information element included in the radio bearer setting information element is not present in the setting of the terminal device, and when the radio bearer setting information element includes the SDAP setting information element,
If the PDU session information element included in the SDAP setting information element is not present in the setting of the terminal device, establish an SDAP entity;
Configuring a SDAP entity corresponding to the PDU session information element according to the SDAP configuration information element, and associating a radio bearer established according to the radio bearer configuration information element with the SDAP entity;
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
Notifying the PDU session information element to an upper layer, comprising a processing unit,
Terminal device. A terminal device that communicates with a base station device,
A receiving unit that receives an RRC reconfiguration message including a radio bearer configuration information element from the base station;
When the value of the radio bearer identifier information element included in the radio bearer configuration information element is present in the setting of the terminal device, and when the radio bearer configuration information element includes an SDAP configuration information element,
Re-establishing a SDAP entity according to the SDAP configuration information element,
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
A processing unit for notifying a PDU session information element included in the SDAP setting information element to an upper layer,
Terminal device. A base station device communicating with the terminal device,
A transmitting unit that transmits an RRC reset message to the terminal device;
The RRC reconfiguration message includes a radio bearer configuration information element, comprising a processing unit that causes the terminal device to perform processing,
The processing is
When the value of the radio bearer identifier information element included in the radio bearer setting information element is not present in the setting of the terminal device, and when the radio bearer setting information element includes the SDAP setting information element,
If the PDU session information element included in the SDAP setting information element is not present in the setting of the terminal device, establish an SDAP entity;
Configuring a SDAP entity corresponding to the PDU session information element according to the SDAP configuration information element, and associating a radio bearer established according to the radio bearer configuration information element with the SDAP entity;
When the SDAP setting information element includes a QoS flow information element to be added that is associated with a radio bearer corresponding to the value of the radio bearer identifier information element,
When the QoS flow identifier information element included in the oS flow information element does not exist in the setting of the terminal device,
Notifying the PDU session information element to an upper layer,
Base station device. A base station device communicating with the terminal device,
A transmitting unit that transmits an RRC reset message to the terminal device;
The RRC reconfiguration message includes a radio bearer configuration information element, comprising a processing unit that causes the terminal device to perform processing,
The processing is
When the value of the radio bearer identifier information element included in the radio bearer configuration information element is present in the setting of the terminal device, and when the radio bearer configuration information element includes an SDAP configuration information element,
Re-establishing a SDAP entity according to the SDAP configuration information element,
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
A process of notifying a PDU session information element included in the SDAP setting information element to an upper layer.
Base station device. A method of a terminal device communicating with a base station device,
Receiving an RRC reconfiguration message including a radio bearer configuration information element from the base station;
When the value of the radio bearer identifier information element included in the radio bearer setting information element is not present in the setting of the terminal device, and when the radio bearer setting information element includes the SDAP setting information element,
If the PDU session information element included in the SDAP setting information element is not present in the setting of the terminal device, establish an SDAP entity;
Configuring a SDAP entity corresponding to the PDU session information element according to the SDAP configuration information element, and associating a radio bearer established according to the radio bearer configuration information element with the SDAP entity;
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
Notifying the upper layer of the PDU session information element,
Method. A method of a terminal device communicating with a base station device,
Receiving an RRC reconfiguration message including a radio bearer configuration information element from the base station;
When the value of the radio bearer identifier information element included in the radio bearer setting information element is present in the setting of the terminal device, and when the radio bearer setting information element includes the SDAP setting information element,
Re-establishing a SDAP entity according to the SDAP configuration information element,
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, the QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
Notifying the upper layer of a PDU session information element included in the SDAP setting information element,
Method. A method of a base station device communicating with a terminal device,
Sending an RRC reset message to the terminal device,
The RRC reconfiguration message includes a radio bearer configuration information element,
When the value of the radio bearer identifier information element included in the radio bearer setting information element is not present in the setting of the terminal device, and when the radio bearer setting information element includes the SDAP setting information element,
If the PDU session information element included in the SDAP setting information element is not present in the setting of the terminal device, establish an SDAP entity;
Configuring a SDAP entity corresponding to the PDU session information element according to the SDAP configuration information element, and associating a radio bearer established according to the radio bearer configuration information element with the SDAP entity;
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
Causing the terminal device to perform a process of notifying the PDU session information element to an upper layer,
Method. A base station device communicating with the terminal device,
Sending an RRC reset message to the terminal device,
The RRC reconfiguration message includes a radio bearer configuration information element,
When the value of the radio bearer identifier information element included in the radio bearer configuration information element is present in the setting of the terminal device, and when the radio bearer configuration information element includes an SDAP configuration information element,
Re-establishing a SDAP entity according to the SDAP configuration information element,
When the SDAP setting information element includes a QoS flow information element to be added, which is associated with a radio bearer corresponding to the value of the radio bearer identifier information element, a QoS flow identifier included in the added QoS flow information element If the information element is not present in the settings of the terminal device,
Causing the terminal device to perform a process of notifying an upper layer of a PDU session information element included in the SDAP setting information element;
Method.

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