Technical field
[0001]
The present disclosure relates to wireless communication systems and, more particularly, at the same time communication using a plurality of cells of different Radio Access Technologies the wireless terminal is operated by a different radio station (RATs).
BACKGROUND
[0002]
3rd Generation Partnership Project (3GPP) has (see Non-Patent Document 1) fifth standardization work generation mobile communication system (5G) as 3GPP Release 14 have started in 2016 towards the introduction of after 2020. 5G is realized by a combination of innovative improvement and development through the introduction of continuous improvement and development of the LTE and LTE-Advanced (enhancement / evolution) and new 5G air interface (new Radio Access Technology (RAT)) It is assumed to be. New RAT, for example, LTE / LTE-Advanced continuous development frequency band of interest (eg, 6 GHz or less) frequencies higher than, for example 10 GHz or more super high frequency band and 30 GHz or more mm to support the sideband.
[0003]
　In this specification, the fifth-generation mobile communication system is also referred to 5G System, or Next Generation (NextGen) System (NG System). New RAT for 5G System is, New Radio (NR), called 5G RAT, or NG RAT. New radio access network for 5G System (Radio Access Network (RAN)) is referred to as 5G-RAN or NextGen RAN (NG RAN). New base station within the 5G-RAN is called NR NodeB (NR NB) or gNodeB (gNB). New core network for 5G System is called 5G Core Network (5G-CN) or NextGen Core (NG Core). Wireless terminal connected to 5G System (User Equipment (UE)) is, 5G UE, called NextGen UE (NG UE) or simply UE. RAT for 5G System, UE, radio access network, core network, the network entity (node), and the official name, such as protocol layer will be future decisions in the process of standardization work progresses.
[0004]
　Also, the term "LTE" as used herein, unless otherwise indicated, includes an improvement and development of the LTE and LTE-Advanced for enabling interworking between 5G System. Improvement and development of the LTE and LTE-Advanced for interworking with 5G System is, LTE-Advanced Pro, LTE +, or also called enhanced LTE (eLTE). Furthermore, "Evolved Packet Core (EPC)" as used herein, "Mobility Management Entity (MME)", "Serving Gateway (S-GW)", and "Packet Data Network (PDN) Gateway (P-GW terminology LTE network or logical entities) "or the like, unless otherwise indicated, includes these improvements and development for enabling interworking between 5G System. Improved EPC, MME, S-GW, and P-GW, for example, enhanced EPC (eEPC), enhanced MME (eMME), enhanced S-GW (eS-GW), and enhanced P-GW (eP-GW ) also called.
[0005]
　In LTE and LTE-Advanced, in order of Quality of Service (QoS) and packet routing, the bearer for each and PDN connection specific QoS class RAN (ie, Evolved Universal Terrestrial RAN (E-UTRAN)) and a core network (ie, used by both EPC). That is, in the Bearer-based QoS (or per-bearer QoS) concept is one or more Evolved Packet System (EPS) bearers are set up between the P-GW of the UE and EPC, the plurality that have the same QoS class service data flow (service data flows (SDFs)) is transferred through one EPS bearer satisfying these QoS. SDF is, Policy and Charging Control (PCC) rule-based SDF template (ie, packet filters) is one or more packet flows that match. Further, for packet routing, each packet to be sent through the EPS bearer can discern whether associated with this packet which bearer (ie, General Packet Radio Service (GPRS) Tunneling Protocol (GTP) tunnel) (The identify ) contains information for.
[0006]
　In contrast, in 5G System, might radio bearer is used in the 5G-RAN, the bearers in an interface between the 5G-CN in and 5G-CN and 5G-RAN has been considered not to be used are (see non-Patent Document 1). Specifically, PDU Flows are defined instead of the EPS bearer, one or more SDFs are mapped to one or more PDU Flows. PDU flow between the user plane termination entity in 5G UE and NG Core (ie, the entity corresponding to the P-GW in the EPC) corresponds to the EPS bearer in EPS Bearer-based QoS concepts. PDU flow corresponds to the finest particle size of the packet forwarding and processing within 5G system (treatment) (finest granularity). In other words, 5G System is, Bearer-based QoS concept of place in Flow-based QoS (or per-flow QoS) to adopt the concept. In the Flow-based QoS concept, QoS is handled in the PDU flow unit (handled). The QoS framework 5G system, PDU flow is identified by PDU flow ID in the header that encapsulates the Service Data Unit of NG3 tunnel interface (encapsulating). NG3 interface is a user plane interface between the 5G-CN and gNB (ie, 5G-RAN). Association between 5G UE and the data network (association) is referred to as PDU session (PDU session). PDU session is a term corresponding to LTE and LTE-Advanced PDN connection (PDN connection). Can be more than one PDU Flows are set in one PDU session.
[0007]
　It should be noted, PDU flow is also referred to as "QoS flow". QoS flow is the finest granularity of QoS processing within 5G system (treatment) (finest granularity). User plane traffic with the same NG3 marking value in PDU session corresponds to QoS flow. NG3 marking corresponds to the PDU flow ID described above, also called QoS flow ID, further also called Flow Identification Indicator (FII).
[0008]
　Furthermore, the 5G System supports network slicing also been studied (see Non-Patent Document 1). Network slicing uses Network Function Virtualization (NFV) technology and software-defined networking (SDN) technology makes it possible to create a logical network having a plurality of virtualization on a physical network. Each of virtualized logical networks, called network slice (network slice) or network slice instance (network slice instance), comprising a logical node (nodes) and functions (functions), certain traffic and it is used for signaling. Both 5G-RAN or 5G-CN, or they have a Slice Selection Function (SSF). SSF, based on information provided by at least one of the 5G UE and 5G-CN, selects one or more network slices suitable for the 5G UE.
[0009]
　Figure 1 shows the basic architecture of the 5G system. UE establishes one or more signaling radio bearers (Signalling Radio Bearers (SRBs)) and one or more data radio bearers (Data Radio Bearers (DRBs)) between the GNb. 5G-CN and gNB establishes a control plane interfaces and user plane interface for the UE. Control plane interface between the 5G-CN and gNB (ie, RAN) is referred to as NG2 interface or NG-c interface, transfer of Non-Access Stratum (NAS) information and control between 5G-CN and GNb It is used for information (eg, NG2 AP information Element). User plane interface between the 5G-CN and gNB (ie, RAN) is called the NG3 interface or NG-u interface, the transfer of packets of one or more PDU Flows in the UE the PDU session (packets-) They are used to.
[0010]
　Incidentally, (see Annex J, and Non-Patent Document 2 Non-Patent Document 1) architecture shown in FIG. 1, but one of the plurality of 5G architectural options (or deployment scenarios (deployment Scenarios)). Architecture shown in Figure 1 is a architecture called "Standalone NR (in NextGen System)" or "Option 2". In contrast, FIGS. 2 and 3 show "Non-standalone NR in EPS" and referred to architectural options 3 and 3A, respectively. 2 and 3, the control plane interface is shown by a dotted line, the user plane interface is shown in solid lines. Architecture options 3 and 3A are anchor RAT (or primary RAT or master RAT) dual connectivity arrangement comprising NR as E-UTRA and secondary RAT as (Dual connectivity (DC) deployments). Option 3 and 3A, E-UTRA (LTE eNB) and NR (GNb) is connected to the EPC. NR user plane connection to the EPC is via the LTE eNB Option 3 but passes directly to the user plane interface between the options in 3A GNb and EPC.
[0011]
　Non-Patent Document 3, the architecture options 3 and 3A, i.e. the DC architecture E-UTRA and NR are connected to the EPC, proposes to NR GNb supports DC function of LTE (Functionalities) and procedures (procedures The) doing. Further, Non-Patent Document 3, in the DC architecture E-UTRA and NR are connected to the EPC, NR GNb is an LTE QoS framework (ie, bearer based QoS) the EPC, toward the LTE eNB, and UE apply it is proposed to. More specifically, Non-Patent Document 3 proposes the following matters:
· NR when gNB is added as a secondary node, the required QoS services (ie, bearer) LTE DC for setting procedure (eg, SeNB addition) is applied that;
for-LTE of Secondary Cell Group (SCG) bearer options, E-UTRAN Radio Access bearer ( E-RAB) is established between the EPC and NR GNb ; is it is
for-LTE split bearer options, it X2-U is established between the LTE eNB and GNb;
for-LTE SCG bearer options and split bearer options, NR GNb the DRB is established between the UE.
[0012]
　Non-Patent Document 4, the architecture option 3A, one-to-one mapping between the DRB (ie, SCG bearer) of S1-U and SCG: proposes that there is (1 1 mapping). Non-Patent Document 4, further, EPC of the QoS attribute (attributes) is used for the EPS bearers, thus radio bearer parameters used in QoS parameters a (parameters) NR used in EPC (radio bearer It has proposed that there is a need to be mapped to parameters).
[0013]
　Further, NR It is contemplated that use different radio parameter set into a plurality of frequency bands. Each radio parameter set is referred to as the "numerology". OFDM numerology for Orthogonal Frequency Division Multiplexing (OFDM) system, for example, the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval (TTI) length), sub frame length (subframe duration), including cyclic prefix length (cyclic prefix length), and the symbol period (symbol duration). 5G system is different types of services with different service requirements, for example, broadband communications (enhanced Mobile Broad Band: eMBB), reliable, low-latency communication (Ultra Reliable and Low Latency Communication: URLLC), and many connection M2M communication (massive Machine Type Communication: mMTC) including, to support. Selection of Numerology is dependent on the service requirements.
[0014]
　UE and NR GNb of 5G system supports aggregation of a plurality of NR carriers of different Numerologies. In 3GPP, different low-layer aggregation (lower layer aggregation), such as aggregation of a plurality of NR carriers numerologies existing LTE Carrier Aggregation (CA) or an existing higher-layer aggregation, such as Dual Connectivity (upper layer aggregation) it has been considered to be realized by (e.g., see non-Patent Document 5-7).
CITATION
Non-patent literature
[0015]
非特許文献1 : 3GPP TR 23.799 V14.0.0 (2016-12) “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on Architecture for Next Generation System (Release 14)”, December 2016
非特許文献2 : 3GPP TR 38.801 V1.0.0 (2016-12) “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on New Radio Access Technology; Radio Access Architecture and Interfaces (Release 14)”, December 2016
非特許文献3 : 3GPP R2-168400, NTT DOCOMO, INC., “QoS and bearer for DC between LTE and NR”, 3GPP TSG-RAN WG2 Meeting #96, Reno, USA, 14-18 November 2016
非特許文献4 : 3GPP R2-168686, Nokia, Alcatel-Lucent Shanghai Bell, “EPC - NR PDCP interaction for tight interworking: User Plane aspects”, 3GPP TSG-RAN WG2 Meeting #96, Reno, USA, 14-18 November 2016
非特許文献5 : 3GPP TR 38.804 V0.4.0 (2016-11) “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on New Radio Access Technology; Radio Interface Protocol Aspects (Release 14)”, November 2016
非特許文献6 : 3GPP R2-164788, Nokia, Alcatel-Lucent Shanghai Bell, “Carrier Aggregation between carriers of different air interface numerologies”, 3GPP TSG-RAN WG2 Meeting #95, Gothenburg, Sweden, 22-26 August 2016
非特許文献7 : 3GPP R2-165328, “Aggregation of carriers in NR”, 3GPP TSG-RAN WG2 Meeting #95, Gothenburg, Sweden, 22-26 August 2016
Summary of the Invention
Problems that the Invention is to Solve
[0016]
　Present inventors have conducted studies with respect to interworking between E-UTRA and NR, we found several problems. For example, the DC architecture E-UTRA and NR are connected to the EPC (ie, architectural options 3 and 3A), Secondary GNb as secondary nodes (SgNB) supports multiple Numerologies. 5G UE simultaneously multiple numerologies between 1 cell or multiple cells (i.e., a single RRC connection) can be used. However, if the SgNB is supports multiple Numerologies UE to use it, how to do radio resource configuration about the numerology of SCG cells (SCG carrier) the UE is not clear.
[0017]
　The problem with Numerology is other E-UTRA-NR DC architecture (eg, architectural options 7 and 7A) can occur any time. Architecture options 7 and 7A are anchor RAT (or primary RAT or master RAT) dual connectivity arrangement comprising NR as E-UTRA and secondary RAT as (Dual connectivity (DC) deployments). Option 7 and 7A, E-UTRA (LTE eNB) and NR (GNb) is connected to the 5G-CN. NR user plane connection to 5G-CN is via the Option 7 LTE eNB, but passes directly to the user plane interface between the options in 7A GNb and 5G-CN. In the case of option 7 and 7A also when SgNB is supports multiple Numerologies UE to use it, how to do radio resource configuration about the numerology of SCG cells (SCG carrier) the UE is not clear.
[0018]
　Additionally, similar issues Numerology may also occur in Inter-RAT handover to NR from E-UTRA. That is, when the UE is handed over to the target gNB support multiple numerologies from the source LTE eNB, is not clear whether to radio resource configuration about the numerology of the target NR cell how the UE.
[0019]
　Therefore, one of the objective to be achieved is the embodiment disclosed herein, the secondary gNB in ​​Inter-RAT handover to NR from Inter-RAT dual Connectivity and E-UTRA between the E-UTRA and NR or device which makes it possible to set the numerology of cells provided to the UE by the target GNb, is to provide a method, and a program. Incidentally, this objective should more embodiments disclosed herein is noted that only one of several objects of it and to achieve. Other objects or problems and novel features will become apparent from the description, or the accompanying drawings of this specification.
Means for Solving the Problems
[0020]
　In a first aspect, the second radio access network (RAN) node, is used in a wireless communication system. The wireless communications system supports a first RAT and a second RAT. The second RAN node includes a memory, and at least one processor coupled to said memory. Wherein the at least one processor is configured to send to the wireless terminal via the first RAN node a radio resource configuration of the second RAT associated with the first RAT. The radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT.
[0021]
　In a second aspect, the first radio access network (RAN) node, is used in a wireless communication system. The wireless communications system supports a first RAT and a second RAT. The first RAN node includes a memory, and at least one processor coupled to said memory. Wherein the at least one processor is configured to receive a radio resource configuration of the second RAT from a second RAN node associated with the second RAT, and is configured to send the radio resource set in the wireless terminal. The radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT.
[0022]
　In a third aspect, the radio terminal is used in a wireless communication system. The wireless communications system supports a first RAT and a second RAT. The wireless terminal includes at least one radio transceiver and at least one processor. Wherein the at least one wireless transceiver is configured to communicate with the first of the first radio access network (RAN) a second RAN node associated with the node and the second RAT associated with the RAT . Wherein the at least one processor, a radio resource configuration of the second RAT, via the first RAN node is configured to receive from the second RAN node. The radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT.
[0023]
　In a fourth aspect, a method in a second radio access network (RAN) node, the second wireless terminal via a first RAN node a radio resource configuration of the RAT associated with the first RAT It includes sending. The radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT.
[0024]
　In a fifth aspect, the method of the first radio access network (RAN) node receives from the second RAN node associated with a radio resource configuration of the second RAT to the second RAT, the radio resource It includes sending a setting to the wireless terminal. The radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT.
[0025]
　In a sixth aspect, a method in a wireless terminal, a radio resource configuration of the second RAT, through a first radio access network (RAN) node associated with the first RAT, the second It includes receiving from a second RAN node associated with RAT. The radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT.
[0026]
　In a seventh aspect, the program, when loaded into a computer, including a fourth above, fifth, or sixth instructions for causing the method to a computer in accordance with aspects of the (software code).
Effect of the invention
[0027]
　According to the embodiments described above, sets the numerology of the cells provided by the secondary gNB or target gNB the UE in Inter-RAT handover to NR from Inter-RAT dual Connectivity and E-UTRA between the E-UTRA and NR device that allows, method, and can provide a program.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028]
FIG. 1 is a diagram illustrating the basic architecture of the 5G System according to background art.
[2] according to the background art, it shows the architecture option 3 for dual connectivity for E-UTRA (LTE eNB) and NR (GNb) is connected to the EPC.
[3] according to the background art, it shows the architecture option 3A for dual connectivity for E-UTRA (LTE eNB) and NR (GNb) is connected to the EPC.
4 is a diagram showing an example of configuration of a wireless communication network in accordance with some embodiments.
5 is a sequence diagram showing an example of SCG establishment procedure according to the first embodiment.
6 is a sequence diagram showing an example of signaling between the MeNB and SgNB according to the second embodiment.
7 is a flowchart showing an example of an operation of the LTE eNB (MeNB) according to the second embodiment.
8 is a flowchart showing an example of the operation of the NR gNB (SgNB) according to the third embodiment.
9 is a diagram showing an example of configuration of a wireless communication network according to the fourth embodiment.
FIG. 10 is a sequence diagram showing an example of Inter-RAT handover procedure according to the fourth embodiment.
11 is a block diagram showing a configuration example of a NR GNb according to some embodiments.
12 is a block diagram showing a configuration example of a UE according to some embodiments.
DESCRIPTION OF THE INVENTION
[0029]
　Hereinafter, specific embodiments will be described in detail with reference to the drawings. In the drawings, the same or corresponding components are denoted by the same reference numerals, for clarity of description, repeated explanation is omitted as appropriate.
[0030]
　A plurality of embodiments described below can can either be carried out independently, also be implemented in appropriate combination. These several embodiments have different novel features together. Accordingly, the plurality of embodiments, contribute to solving the different purpose or task to each other, which contributes to achieve different effects from each other.
[0031]
　A plurality of embodiments shown below is described the DC architecture E-UTRA and NR are connected to the EPC as the main subject. However, these embodiments may be applied to other wireless communication systems that support DC architecture different RAT is connected to a common core network employing different QoS framework.
[0032]

　FIG. 4 shows a configuration example of a wireless communication network according to some embodiments including the present embodiment. In the example of FIG. 4, a wireless communications network comprises a LTE eNB1, NR gNB2, UE3, and EPC4. Wireless communication network shown in Figure 4, supports dual connectivity (DC), which supports an optional 3 or Option 3A or both mentioned above. Option 3 and 3A supports dual connectivity including NR as E-UTRA and secondary RAT as an anchor RAT (or primary RAT). Option 3 and 3A, E-UTRA (LTE eNB1 ) and NR (GNB2) is connected to the EPC4. NR user plane connection to EPC4 is via the LTE eNB1 Option 3, the UE3 user packets, through the interface 401 between the base station between the interface 403, as well as eNB1 and EPC4. On the other hand, the option 3A, NR user plane connection to EPC4 passes through the direct user plane interface 404 between gNB2 the EPC4.
[0033]
　UE3 has the primary RAT capability to communicate simultaneously with gNB2 associated with (E-UTRA) to the associated eNB1 and secondary RAT (NR). In other words, UE3 has the primary RAT capability and cell aggregating the gNB2 associated with (E-UTRA) eNB1 cells associated with the secondary RAT (NR). Furthermore other words, UE3 has the ability to be set both cell gNB2 associated with the primary RAT (E-UTRA) eNB1 cells associated with the secondary RAT (NR). In architectural options 3 and 3A, the air interface 402 between eNB1 and UE3 provide control plane connection and user plane connection. On the other hand, air interface 405 between the gNB2 and UE3 may include at least user plane connection may not include the control plane connection. In DC architecture E-UTRA and NR are connected to EPC4, the master eNB (MeNB) 1 provides one or more E-UTRA MCG cell UE3, secondary gNB (SgNB) 2 is 1 or more the NR SCG cells provides the UE3.
[0034]
　EPC4 includes a plurality of core network nodes comprising MME5 and S-GW6. MME5 is control plane node, S-GW6 is a user plane node. MME5 performs an attach already (ie, EMM-REGISTERED state) mobility management and bearer management of UEs are in the core network. Mobility management is used to track the current location of the UE (keep track), including maintaining a mobility management context (MM context) about the UE. Bearer management, the UE controls the establishment of EPS bearers for communicating with an external network via the E-UTRAN and EPC4 including eNB1 (Packet Data Network (PDN)), to maintain the EPS bearer context for the UE including. S-GW6 is the gateway between E-UTRAN, is connected to the eNB1 or gNB2 or both via the S1-U interface.
[0035]
　gNB2 supports multiple numerologies in one or more NR carrier (cell). That is, one or more numerologies to one NR cell associated. Numerology is the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval (TTI) length), the length of the subframe (subframe duration), the slot length (slot duration), number of slots in the subframe (number of slots per subframe), cyclic prefix length (cyclic prefix length), at least one of the symbol period (symbol duration), and the number of symbols in the subframe (number of symbols per subframe) One, including the. In the case where the system bandwidth corresponds to the bandwidth supported by UE aspect aggregation of a plurality carriers (UE viewpoints) (ie Carrier Aggregation (CA)), numerology is the bandwidth of the plurality of carriers aggregated and system it may further comprise also information about the correspondence between bandwidths. Multiple numerologies comprises at least one individual (dedicated or additional) numerology not at least one reference numerology, see numerology. Referring numerology defines the reference sub-frame structure for the NR carriers gNB2 supported (eg, the reference sub-frame length, the number of the reference OFDM symbols in the subframe, or reference TTI length). Information of the reference numerology, the system information (eg, Master Information Block) may be transmitted by, may be defined in the specification as uniquely determined with respect to the carrier frequency, or the synchronization signals (eg, Primary Synchronisation Signal (PSS), Secondary Synchronisation Signal (SSS)) and may be such that UE3 by receiving the UE3 can detect information of the reference numerology.
[0036]
　Then, in following describes how to configure the numerology of SCG cells provided by the secondary gNB (SgNB) 2 to UE3 in DC architecture E-UTRA and NR are connected to EPC4. gNB2 according to the present embodiment is configured to send NR radio resource configuration for the E-UTRA-NR Dual Connectivity (DC) to the UE3 through the master eNB (MeNB) 1. NR radio resource settings, explicitly or implicitly indicate a different at least one individual numerology the reference numerology of the plurality of numerologies supported by one or more NR cells contained in SCG of SgNB2. That, NR radio resource configuration includes information on at least the individual numerology. Information on individual numerology may be include an information element indicating explicitly individual numerology, it may include an information element indicating radio parameters necessary to derive the individual numerology. Individual numerology is, for example, the subcarrier interval, the system bandwidth, the TTI length, subframe length, slot length, number of slots within a subframe, cyclic prefix length, a symbol period, or number of symbols in the subframe, or any combination thereof. NR radio resource configuration may also be referred to as SCG wireless setting (radio configuration) or SCG-Config. MeNB1 receives the NR radio resource configuration from SgNB2, and is configured to send it to the UE3. UE3 is a NR radio resource configuration for the E-UTRA-NR DC, via MeNB1, and is configured to receive from SgNB2.
[0037]
　In some implementations, SgNB2 receives a radio bearer setup request from MeNB1, NR data radio bearer for UE3 represented by a radio bearer setup request (Data radio Bearer (DRB)) at least one corresponding to the requirements for it may be selected individually numerology. Radio bearer setup request is a message that causes it to set the NR DRB for E-UTRA-NR DC to GNB2. The radio bearer setup request may be referred to as SgNB Addition Request. Requirements for NR DRB may include both QoS requirement or service type, or these. QoS requirements, including priority required in the network bearer or flow associated with NR DRB or which, at least one of Maximum Bit Rate (MBR), and Allocation and Retention Priority (ARP). Service type, for example, broadband communications (enhanced Mobile Broad Band: eMBB), reliable, low-latency communication (Ultra Reliable and Low Latency Communication: URLLC), and many connection M2M communication (massive Machine Type Communication: mMTC) of It shows one.
[0038]
　SgNB2 is an information element indicating at least one individual numerology selected may be included in the NR radio resource configuration. In this case, SgNB2 sends an explicit or implicitly shown NR radio resource configuration at least one numerology selected response message (eg, SgNB Addition Request Acknowledge message) to the radio bearer setting request to MeNB1 with it may be. MeNB1 may be transmitted to UE3 using RRC Connection Reconfiguration message NR radio resource configuration received from SgNB2.
[0039]
　Figure 5 is a sequence diagram showing an example (the process 500) of the SCG establishment procedure according to the present embodiment. Procedure shown in Figure 5, has followed the SeNB Addition, procedures of LTE DC basically. In step 501, MeNB1 sends SgNB Addition Request message to SgNB2. SgNB Addition Request message requests the setting of the radio bearer for the DC to use E-UTRA and NR as the primary RAT and secondary RAT respectively (SCG DRB) to SgNB2.
[0040]
　SgNB Addition Request message corresponds to "radio bearer setup request" described above. Specifically, SgNB Addition Request message, "SgNB Security Key (for SCG bearer)" information element (Information Element (IE)), "E-RAB To Be Added List" IE, and "MeNB to SgNB Container" IE including. "E-RAB To Be Added List" IE includes E-RAB ID and E-RAB Level QoS Parameters of the E-RAB required to establish the MeNB1. "MeNB to SgNB Container" IE is, RRC: including the SCG-ConfigInfo message. RRC: SCG-ConfigInfo message is used by the MeNB to request the SgNB to establish (establish), modified (the modify), or releases (release) SCG. SCG-ConfigInfo message comprises, for example, EPS bearer Identity, DRB Identity, and DRB type. Note that cells of secondary RAT (NR) (eg, a radio link, Access Stratum (AS) layer) with a cell of a primary RAT (E-UTRA) (eg, a radio link, AS layer) security policy to be used in (eg, security algorithm) may be it is different. In this case, SgNB Security Key IE may include information security policy to be used in the cell of the secondary RAT (NR). Furthermore, SgNB2 the RRC transmits the information of the Security Policy to UE3: may be included in the SCG-Config message.
[0041]
　In step 502, SgNB2 sends SgNB Addition Request Acknowledge message to MeNB1. SgNB Addition Request Acknowledge message is a response message to SgNB Addition Request message. SgNB Addition Request Acknowledge message includes a SCG DRB radio resource settings generated by SgNB2. The SCG DRB radio resource configuration is sent to the UE3 through MeNB1. The SCG DRB radio resource configuration indicates at least one individual numerology selected by SgNB2.
[0042]
　Specifically, SgNB Addition Request Acknowledge message, including the "E-RAB Admitted To Be Added List" IE, and "SgNB to MeNB Container" IE. "SgNB to MeNB Container" IE is, RRC: including the SCG-Config message. RRC: SCG-Config message is used to transfer the radio resource configuration generated by SgNB2. RRC: SCG-Config message indicates at least one individual numerology selected by SgNB2.
[0043]
　In step 503, MeNB1, in response to receiving the SgNB Addition Request Acknowledge message from SgNB2, sends the RRC Connection Reconfiguration message to the UE3. The RRC Connection Reconfiguration message, SgNB Addition Request Acknowledge sent message from SgNB2 using the MeNB1 RRC: including SCG-Config message. AS layer of UE3 primary RAT (ie, E-UTRA (LTE)) receives the RRC Connection Reconfiguration message at E-UTRA cell MeNB1 (ie, Primary Cell (PCell)). AS layer of UE3 secondary RAT (ie, NR) is, RRC: based on the SCG-Config message, it sets the SCG DRB according to at least one individual numerology selected by SgNB2.
[0044]
　In step 504, UE3 (ie, AS layer of E-UTRA) sends a RRC Connection Reconfiguration Complete message E-UTRA cell (ie, PCell) of MeNB1 to MeNB1 in. Further, UE3 (ie, NR AS layer) starts the procedure (eg, Random Access Procedure) for synchronizing the SgNB2.
[0045]
　In step 505, MeNB1 in response to receiving the RRC Connection Reconfiguration Complete message from UE3, sends the SgNB Reconfiguration Complete message to the SgNB2.
[0046]
　As understood from the above description, SgNB2 according to the present embodiment is configured to send NR radio resource configuration for the E-UTRA-NR DC to UE3 via the master eNB (MeNB) 1, NR radio resource setting indicates at least one different individual numerology the reference numerology of the plurality of numerologies supported by one or more NR cell SgNB2. Thus, SgNB2 is the numerology of SCG cells provided by SgNB2 in E-UTRA-NR DC can be set to UE3. UE3 is able to know numerology to use in SCG cells provided by SgNB2.
[0047]

　configuration example of a wireless communication network according to the present embodiment is the same as FIG. This embodiment, in E-UTRA-NR DC, improvement for measurement UE measurement report indicating the NR cell SgNB2 based on reference numerology of the (measurement report) MeNB1 is available is provided.
[0048]
　SgNB2 according to the present embodiment, SgNB2 base station between the interfaces between the MeNB1 in setup procedure (eg, Xn interface or X3 interface), and is configured to notify at least one reference numerology to MeNB1. As already explained, reference numerology defines a reference subframe length for the NR carriers gNB2 supports.
[0049]
　Figure 6 is a sequence diagram showing an example (the process 600) of the signaling between the MeNB1 and SgNB2. In step 601, SgNB2 uses the Xn Setup Request message or Xn Setup Response message, and notifies a plurality of numerologies supported in one or more NR carriers used by SgNB2 the MeNB1. A plurality of numerologies supported by SgNB2 includes at least one reference numerology.
[0050]
　In some implementations, MeNB1 may use reference numerology of SgNB2 for UE measurements. Figure 7 is a flowchart showing an example of the operation of MeNB1 the (process 700). In step 701, MeNB1 generates a set measurement indicating the reference numerology of NR cell provided in (Measurement configuration) by SgNB2. In step 702, MeNB1 sends the generated measurement set to UE3. Measurement configuration requires measuring the NR cell SgNB2 based on the reference numerology specified by measurement set to UE3. Thus, MeNB1 can utilize UE measurement report indicating the measurement result of the NR cell SgNB2 based on reference numerology (measurement report). MeNB1 the start of E-UTRA-NR DC, stop, or to determine the correction, the measurement results of the NR cell SgNB2 based on reference numerology may be utilized.
[0051]

　configuration example of a wireless communication network according to the present embodiment is the same as FIG. This embodiment, in E-UTRA-NR DC, improvement for the measurement of NR cell SgNB2 based on reference numerology SgNB2 to be able to specify the UE3 is provided.
[0052]
　SgNB2 according to the present embodiment is configured to send the setting of the measurement according to the reference numerology in carriers other SgNB2 to UE3 via MeNB1. Figure 8 is a flowchart showing an example of the operation of SgNB2 the (process 800). In step 801, SgNB2 generates a set measurement indicating the reference numerology of NR cell provided in (Measurement configuration) by SgNB2. In step 802, SgNB2 sends the generated measurement configuration to UE3 via MeNB1. Specifically, MeNB1 receives measurement configuration from SgNB2, which may be sent to the UE3. Measurement configuration requires measuring the NR cell SgNB2 based on the reference numerology specified by measurement set to UE3. Thus, MeNB1 can utilize UE measurement report indicating the measurement result of the NR cell SgNB2 based on reference numerology (measurement report). MeNB1 the start of E-UTRA-NR DC, stop, or to determine the correction, the measurement results of the NR cell SgNB2 based on reference numerology may be utilized.
[0053]

　The present embodiment, another E-UTRA-NR DC architecture (eg, architectural options 7 and 7A) by a secondary gNB or target gNB in Inter-RAT handover from and E-UTRA to the NR improvements are provided to enable setting the numerology of cells provided to the UE.
[0054]
　Figure 9 shows a configuration example of a wireless communication network according to the present embodiment. In one example, a wireless communication network according to the present embodiment may provide E-UTRA-NR DC architecture option 7 or 7A. Option 7 and 7A, E-UTRA (LTE eNB1) and NR (GNB2) is connected to the 5G-CN7. NR user plane connection to 5G-CN7 is via the optional 7 In LTE eNB1, UE3 user packets through the interface 902 between the inter-base station interface 403, as well as eNB1 and 5G-CN7. On the other hand, the option 7A, NR user plane connection to 5G-CN7 passes through the direct user plane interface 902 between the gNB2 and 5G-CN7.
[0055]
　Hereinafter, the procedure for setting the numerology of SCG cells provided by the secondary gNB (SgNB) 2 to UE3 in DC architecture E-UTRA and NR are connected to the 5G-CN7. gNB2 according to the present embodiment may operate in the same manner as gNB2 according to the first embodiment. That is, in this embodiment, GNB2 is configured to send NR radio resource configuration for the E-UTRA-NR Dual Connectivity (DC) to the UE3 through the master eNB (MeNB) 1. NR radio resource configuration shows a different at least one individual numerology the reference numerology of the plurality of numerologies supported by one or more NR cells contained in SCG of SgNB2.
[0056]
　MeNB1, SgNB2, and UE3 of operation may be the same as in SCG established procedures described with reference to FIG. 5 (process 500). That, SgNB2 at least one RRC showing the individual numerology selected by SgNB2: may send encompassing the SCG-Config message SgNB Addition Request Acknowledge message to the MeNB1 (step 502). MeNB1 is, RRC indicates at least one individual numerology selected by SgNB2: a may send the UE3 SCG-Config message includes RRC Connection Reconfiguration message (step 503). AS layer of UE3 secondary RAT (ie, NR) is, RRC: based on the SCG-Config message may be set SCG DRB according to at least one individual numerology selected by SgNB2 (step 504).
[0057]
　Additionally or alternatively, the wireless communications network of the present embodiment may support Inter-RAT handover to NR cell 21 NR GNB2 from E-UTRA cell 11 of LTE eNB1. Hereinafter, if UE3 is handed over from a source E-UTRA cell 11 to the target NR cell 21, the procedure for setting the numerology of the cell 21 that is provided by the target NR GNB2 to UE3.
[0058]
　Figure 10 is a sequence diagram showing an example of the (processing 1000) for Inter-RAT handover procedure according to the present embodiment. In step 1001, the source LTE eNB1 sends to the target gNB2 the NR Handover Request message on the direct inter-base-station interface 403 (eg, Xn interface or X3 interface). NR Handover Request message of step 1001 may include a handover type information element indicating (Handover Type Information Element (IE)) it is a handover from the LTE to the NR. Handover Type IE is, for example, "LTEtoNR" is set.
[0059]
　In step 1002, the target gNB2, based on NR Handover Request message, generates a UE context (the create), allocate resources. Then, the target gNB2 sends NR Handover Request Acknowledge message to the source eNB1. NR Handover Request Acknowledge message is a response message to the NR Handover Request message. NR Handover Request Acknowledge message includes a DRB radio resource configuration of the target NR cell 21 generated by the target GNB2. The radio resource configuration is sent to the UE3 through the source eNB1. The radio resource configuration indicates at least one individual numerology selected by the target GNB2.
[0060]
　Specifically, NR Handover Request Acknowledge message includes the "Target to Source Transparent Container" IE. "Target to Source Transparent Container" IE includes a radio resource configuration information that has been set up by the target gNB2. The radio resource configuration information indicates at least one individual numerology is provided in the target NR cell 21.
[0061]
　In step 1003, the source eNB1 sends a Handover Command message including a radio resource configuration information generated by the target gNB2 encompassing RRC message to the UE3. The RRC message, for example, may be a Mobility from EUTRA COMMAND message may be a RRC Connection Reconfiguration message. Source eNB1 is a radio resource configuration information generated by the target GNB2, it may be included in the "MobilityControlInfoNR" IE of RRC Connection Reconfiguration message.
[0062]
　In step 1004, UE3, in response to receiving the RRC message including Handover Command message, to move to the cell of the target RAN (ie, NR), implementing the handover according to the wireless resource configuration information supplied in Handover Command message to. That, UE3 establishes a wireless connection with the target gNB2 according to at least one individual numerology selected by SgNB2. Here, either use any numerology implementing a handover (or, if numerology should contemplated in the practice of the handover is what) information may be transmitted by the Handover Command message or RRC message including it . UE3 is in accordance with the information, performing the handover (eg, establishing a wireless connection).
[0063]
　In step 1005, UE3, after successfully (successfully) synchronization with the target NR cell 21, and sends a Handover Confirm The for NR message to the target GNB2. Message of step 1005 may be a (NR) RRC Connection Reconfiguration Complete message.
[0064]
　As understood from the above description, GNB2 according to the present embodiment, in one example, the NR radio resource configuration for the E-UTRA-NR DC (ie ,, optional 7 or 7A) in UE3 through MeNB1 is configured to send, NR radio resource configuration shows a different at least one individual numerology the reference numerology of the plurality of numerologies supported by one or more NR cell SgNB2. Thus, SgNB2 is the numerology of SCG cells provided by the E-UTRA-NR DC (ie ,, optional 7 or 7A) in SgNB2 can be set to UE3. UE3 is able to know numerology to use in SCG cells provided by SgNB2.
[0065]
　In another example, GNB2 according to the present embodiment is configured to send NR radio resource configuration for the Inter-RAT handover to NR from E-UTRA to UE3 through the source eNB1, NR radio resource configuration, Referring numerology of the plurality of numerologies supported by one or more NR cells of the target gNB2 indicate different at least one individual numerology and. Thus, the target gNB2 can set the numerology of target NR cell UE3 in Inter-RAT handover to NR from E-UTRA. UE3 is able to know numerology to be used in at least one NR cell 21 provided by the target GNB2.
[0066]
　Then hereinafter, LTE eNB1 according to embodiments of the above, NR GNB2, and an example of the configuration of UE3 will be described. Figure 11 is a block diagram showing a configuration example of a NR GNB2 according to the embodiment described above. Configuration of LTE eNB1 may therewith may be similar as shown in Figure 11. Referring to FIG. 11, GNB2 is, Radio Frequency transceiver 1101, a network interface 1103, a processor 1104, and memory 1105. RF transceiver 1101 performs an analog RF signal processing for communicating with NG UEs including UE3. RF transceiver 1101 may include a plurality of transceivers. RF transceiver 1101 is coupled to the antenna array 1102 and the processor 1104. RF transceiver 1101 receives the modulated symbol data from the processor 1104, generates a transmission RF signal and provides a transmit RF signal to the antenna array 1102. Also, RF transceiver 1101 to generate a baseband received signal based on the reception RF signal received by the antenna array 1102, and supplies it to the processor 1104. RF transceiver 1101 may include an analog beamformer circuitry for beam forming. Analog beamformer circuit includes, for example, a plurality of phase shifters and a plurality of power amplifiers.
[0067]
　Network interface 1103 is used to communicate with a network node (eg, LTE eNB1, MME5, S-GW6). Network interface 1103 may include, for example, a network interface card that complies with the IEEE 802.3 series (NIC).
[0068]
　The processor 1104 performs control plane processing and digital baseband signal processing for wireless communication (data plane processing). Processor 1104 may include multiple processors. For example, the processor 1104 is a modem processor that performs digital baseband signal processing (eg, Digital Signal Processor (DSP)) and protocol stack processor for performing control plane processing (eg, Central Processing Unit (CPU) or Micro Processing Unit ( MPU)) may include. Processor 1104 may include a digital beamformer module for beamforming. Digital beamformer module, Multiple Input Multiple Output (MIMO) may include an encoder and precoder.
[0069]
　Memory 1105 is constituted by a combination of volatile and nonvolatile memory. Volatile memory may be, for example, Static Random Access Memory (SRAM) or Dynamic RAM (DRAM) or a combination thereof. The non-volatile memory, a mask Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, or hard disk drive, or any combination thereof. Memory 1105 may include a storage that is remotely located from the processor 1104. In this case, the processor 1104 may access the memory 1105 via the I / O interfaces that are not network interface 1103 or illustrated.
[0070]
　Memory 1105 may store one or more software modules (computer program) 1106 containing instructions and data for processing by gNB2 described in several embodiments described above. In some implementations, the processor 1104, the software module 1106 that reads out and executes from the memory 1105 may be configured to perform processing of gNB2 described in the above embodiments.
[0071]
　Figure 12 is a block diagram showing a configuration example of UE3. Radio Frequency (RF) transceiver 1201 performs an analog RF signal processing for communicating with the eNB1 and GNB2. RF transceiver 1201 may include a plurality of transceivers. Analog RF signal processing performed by the RF transceiver 1201 includes a frequency up-conversion, the frequency down-conversion, and amplification. RF transceiver 1201 is coupled to the antenna array 1202, and a baseband processor 1203. RF transceiver 1201 receives the modulated symbol data (or OFDM symbol data) from the baseband processor 1203, generates a transmission RF signal and provides a transmit RF signal to the antenna array 1202. Also, RF transceiver 1201 to generate a baseband received signal based on the reception RF signal received by the antenna array 1202, and supplies it to the baseband processor 1203. RF transceiver 1201 may include an analog beamformer circuitry for beam forming. Analog beamformer circuit includes, for example, a plurality of phase shifters and a plurality of power amplifiers.
[0072]
　Baseband processor 1203 performs control plane processing and digital baseband signal processing for wireless communication (data plane processing). Digital baseband signal processing, (a) data compression / decompression, (b) segmentation / concatenation of data, generation / decomposition of (c) transmission format (transmission frame), (d) transmission channel coding / decoding , including generation of (e) modulation (symbol mapping) / demodulation, and OFDM symbol data by (f) Inverse Fast Fourier Transform (IFFT) (baseband OFDM signal). On the other hand, the control plane processing, layer 1 (eg, transmission power control), Layer 2 (eg, radio resource management, and hybrid automatic repeat request (HARQ) process), and layer 3 (eg, attach, mobility and call management including communication management signaling) related.
[0073]
　For example, a digital baseband signal processing by a baseband processor 1203, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, may include a signal processing of the MAC layer, and the PHY layer. Further, the control plane processing by baseband processor 1203, Non-Access Stratum (NAS) protocol, RRC protocol, and may include a process of MAC CE.
[0074]
　Baseband processor 1203 may perform MIMO encoding and precoding for beamforming.
[0075]
　Baseband processor 1203 may include a modem processor that performs digital baseband signal processing (eg, DSP) and a protocol stack processor for performing control plane processing (eg, CPU or MPU). In this case, the protocol stack processor for performing control plane processing may be shared with an application processor 1204 which will be described later.
[0076]
　The application processor 1204, CPU, MPU, also referred to as a microprocessor or processor cores. The application processor 1204 may include a plurality of processors (multiple processor cores). The application processor 1204, a memory 1206 or illustrated which do not result system read from the memory a software program (Operating System (OS)) and various application programs (e.g., call application, WEB browser, a mailer, a camera operation application, music playback by running the application), to realize the UE3 various functions.
[0077]
　In some implementations, as indicated by the dashed line (1205) in FIG. 12, the baseband processor 1203 and an application processor 1204 may be integrated on a single chip. In other words, the baseband processor 1203 and an application processor 1204 may be implemented as a single System on Chip (SoC) device 1205. SoC devices, sometimes referred to as system Large Scale Integration (LSI) or chipset.
[0078]
　Memory 1206 is a volatile memory or nonvolatile memory, or a combination thereof. Memory 1206 may include a physically independent plurality of memory devices. Volatile memory is, for example, a SRAM or DRAM, or a combination thereof. The non-volatile memory, MROM, EEPROM, flash memory, or hard disk drive, or any combination thereof. For example, memory 1206, a baseband processor 1203, an application processor 1204, and may contain accessible external memory device from SoC1205. Memory 1206, within baseband processor 1203, within the application processor 1204, or may include an integrated chip memory device within SoC1205. Furthermore, memory 1206 may include a memory in the Universal Integrated Circuit Card (UICC).
[0079]
　Memory 1206 may store one or more software modules (computer program) 1207 containing instructions and data for processing by the UE3 described in several embodiments described above. Configuration In some implementations, the baseband processor 1203 or the application processor 1204, the software modules 1207 and executes from the memory 1206, to perform the UE3 of the operations discussed with reference to the drawings in the above embodiments it may be.
[0080]
　As described with reference to FIGS. 11 and 12, each of the processors included in the LTE eNB1, NR GNB2, and UE3 according to the above-described embodiments, instructions for performing the algorithm described with reference to the drawings in the computer perform one or more programs including the group. This program is stored using a non-transitory computer readable media of various types (non-transitory computer readable medium), it can be supplied to the computer. Non-transitory computer readable media include with various types of entities (tangible storage medium). Examples of non-transitory computer readable media include magnetic storage media (such as floppy disks, magnetic tape, hard disk drive), magneto-optical recording medium (e.g., magneto-optical disk), Compact Disc Read Only Memory (CD-ROM), CD- R, including CD-R / W, a semiconductor memory (e.g., a mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access memory (RAM)). The program may be provided to a computer using a temporary computer readable media of various types (transitory computer readable medium). Examples of transitory computer readable media include electric signals, optical signals, and electromagnetic waves. Transitory computer readable media, wired communication path such as electrical wires and optical fibers, or via a wireless communication path can provide the program to a computer.
[0081]

　The above-described embodiments have shown an example where SgNB Addition, procedure is used to follow the SeNB Addition, procedure. In the embodiment described above, instead of SgNB Addition, procedures may be used SgNB Modification procedure to follow the SeNB Modification procedure. For example, MeNB1 is, SgNB Addition Request message instead of (eg, step 501 in FIG. 5), may send a SgNB Modification Request message to SgNB2.
[0082]
　MeNB1 a radio bearer setup request (eg, SgNB Addition Request message or SgNB Modification Request message) before sending a the SgNB2, may be performed UE Capability Coordination between MeN1B and SgNB2. For example, MeNB1 sends UE Capability Coordination Request message to SgNB2, may receive UE Capability Coordination Response message from SgNB2. In the Coordination, MeN1B and SgNB2 is shared RF capability (Band combination, measurement capability) fixed UE capability, such as (eg, almost unchanged during data transmission and reception in DC, or the hard split to capability) alone (negotiation) it may be. Furthermore, MeN1B and SgNB2 is, capability (, eg soft buffer / soft channel bit) associated with the UE category specified (unchanged dynamically during DC, or dynamic sharing to capability) static UE capability, such as be shared it may be. Alternatively, MeN1B and SgNB2 may share in the exchange step of static UE capability SeNB Addition Request / Acknowledge messages (or SeNB Modification Request / Acknowledge messages).
[0083]
　Various described in the above embodiments the message (eg, SgNB Addition Request message, SgNB Addition Request Acknowledge message, RRC Connection Reconfiguration message, RRC Connection Reconfiguration Complete message, SgNB Reconfiguration Complete message, Xn Setup Request message, Xn Setup Response message, NR Handover Request message, NR Handover Request Acknowledge message) to the information elements to be included (information element) is not limited to those described above. For example, information element (Information Element) that is included in various messages described above, for the purpose of performing a handover for the purpose of performing DC in LTE eNB1 and NR GNB2, or from E-UTRA to the NR, the aforementioned a direction different from the embodiment, may be communicated, shared between different nodes. More specific examples, at least a portion of the information elements included in SgNB Addition Request message may be included in SgNB Addition Request Acknowledge message. Additionally or alternatively, at least part of the information elements included in SgNB Addition Request message, S1AP message (eg, S1AP: E-RAB Setup Request message) sent from EPC4 (MME5) in LTE eNB1 contained in the it may be. This makes it possible to share information required for performing DC in LTE eNB1 and NR GNB2, between the node associated with the DC performed in LTE eNB1 and NR GNB2.
[0084]
　UE2 described in the above embodiments, the base station (LTE eNB1, NR gNB2), and the operation or processing of the core network (EPC4,5G-CN7) are, Intra-NR Dual Connectivity, and in the case of Inter-GNb Handover also it can be applied. For example, even between the adjacent cells of the same NR system, may be set in numerology is not identical. Therefore, when performing Dual Connectivity or handover, to use what numerology the secondary cell or the target cell may be set for each UE. Specifically, the secondary gNB or target gNB explicitly or implicitly indicate NR wirelessly least one individual numerology different from the reference numerology of the plurality of numerologies supported by its one or more NR cell resources set via the primary gNB or source gNB may be sent to UE3.
[0085]
　In the above embodiment, the numerology can be associated with one or more networks slices (network slice) or network slice instance (network slice instance). For example, information indicating the individual numerology in the above embodiment, information indicating a predetermined network slice or network slice instances (eg, network slice identity, network slice instance identity) may be used. Then UE2 receives the information indicating the predetermined network slice or network slice instance, may detect an individual numerology corresponding thereto. Furthermore, reference Numerology also may be associated with any network slice or network slice instance. At this time, the network slice or network slice instance associated with the reference Numerology is settable in common on the UE in a cell may be (or available) ones. In the case of E-UTRA-NR Dual Connectivity for E-UTRA and NR are connected to the EPC, network slice individual core network nodes: it may be a (Dedicated Core network Node DCN). At this time, DCN identifiers (eg, DCN ID) may be associated with individual numerology.
[0086]
　LTE eNB1 and NR GNB2 described in the above embodiments may be implemented based on the Cloud Radio Access Network (C-RAN) concept. C-RAN may also be referred to as the Centralized RAN. Accordingly, the processes and operations performed by each of the eNB1 and gNB2 described in the above embodiments, is provided by the Digital Unit (DU) contained in the C-RAN architecture, or DU and Radio Unit for (RU) combination it may be. DU is called the Baseband Unit (BBU) or Central Unit (CU). The RU, Remote Radio Head (RRH), Remote Radio Equipment (RRE), Distributed Unit (DU), or also called Transmission and Reception Point (TRP). That is, the processes and operations performed by each of the eNB1 and gNB2 described in the above embodiments may be provided by any one or more wireless stations (or RAN node).
[0087]
　Furthermore, the above-described embodiments are only examples for the application of technical ideas obtained by the present inventor. In other words, the technical idea is not limited to the embodiments described above, it is needless to say various modifications are possible.
[0088]
　For example, some or all of the above embodiments, can be described as the following notes, not limited to the following.
[0089]
(Supplementary Note 1)
　and a second radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, the second RAN node to the second RAT associated,
　the second RAN node,
　a memory,
　and at least one processor coupled to said memory,
　comprising,
　at least one processor is
　a radio resource configuration of the second RAT the first RAT to be configured to send to the wireless terminal via the first RAN node associated,
　the radio resource configuration, at least one numerology different from the reference numerology of the plurality of numerologies supported by the second RAT explicitly or implicitly shown,
the second RAN node.
[0090]
(Supplementary Note 2)
　Each numerology is the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval length), the length of the subframe (subframe duration), the slot length (slot duration ), number of slots in the subframe (number of slots per subframe), cyclic prefix length (cyclic prefix length), symbol period (symbol duration), and of the number of symbols in the subframe (number of symbols per subframe) comprising at least one,
second RAN node according to Appendix 1.
[0091]
(Supplementary Note 3)
　the at least one processor is configured to generate the radio resource configuration of and the second RAT to the first RAT and the primary RAT for dual connectivity to secondary RAT,
Appendix second RAN node according to 1 or 2.
[0092]
(Supplementary Note 4)
　the at least one processor is configured to receive a radio bearer setup request from the first RAN node, the radio bearer setup request by at least one corresponding to the requirements for the radio bearer of the second RAT, shown select numerology, the explicitly or implicitly indicate information elements of at least one numerology selected and is configured to include the radio resource configuration,
the second RAN node according to note 3.
[0093]
(Supplementary Note 5)
　the at least one processor is configured to generate the radio resource configuration for the wireless terminals Inter-RAT handover to the second RAT from the first RAT,
Appendix 1 or the second RAN node according to 2.
[0094]
(Supplementary Note 6)
　The reference numerology defines a reference subframe structure for carriers the second RAT supported,
a second RAN node according to any one of Appendices 1 to 5.
[0095]
(Supplementary Note 7)
　the at least one processor is in the setup procedure of the base between the station interface between the first RAN node and the second RAN node, to notify the reference numerology to the first RAN node is configured,
the second RAN node according to any one of appendices 1-6.
[0096]
(Supplementary Note 8)
　wherein the at least one processor, a set of measurement in the carrier according to the reference numerology via the first RAN node is configured to send to the wireless terminal,
the second according to Appendix 6 RAN nodes.
[0097]
(Supplementary Note 9)
　a first radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, wherein the first RAN node to the first RAT associated,
　the first RAN node,
　a memory,
　and at least one processor coupled to said memory,
　comprising,
　the at least one processor,
　wherein the radio resource configuration of the second RAT second RAT received from the second RAN node associated with said configured to send a radio resource configuration to the wireless terminal,
　the radio resource configuration, the reference numerology of the plurality of numerologies supported by the second RAT is different at least one numerology shown explicitly or implicitly,
the first RAN node.
[0098]
(Supplementary Note 10)
　each numerology, the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval length), the length of the subframe (subframe duration), the slot length (slot duration ), number of slots in the subframe (number of slots per subframe), cyclic prefix length (cyclic prefix length), symbol period (symbol duration), and of the number of symbols in the subframe (number of symbols per subframe) comprising at least one,
first RAN node according to note 9.
[0099]
(Supplementary Note 11)
　the at least one processor receives the radio resource configuration from the second RAN nodes for dual connectivity to the first and RAT as the primary RAT and secondary RAT the second RAT is configured,
the first RAN node according to note 9 or 10.
[0100]
(Supplementary Note 12)
　wherein the at least one processor, to receive the radio resource configuration from the second RAN node from the first RAT for the wireless terminals Inter-RAT handover to the second RAT is configured,
the first RAN node according to note 9 or 10.
[0101]
(Supplementary Note 13)
　The reference numerology defines a reference subframe structure for carriers the second RAT supports,
a first RAN node according to any one of Appendices 9-12.
[0102]
(Supplementary Note 14)
　the at least one processor is a set of measurements on the carrier according to the reference numerology is configured to send to the wireless terminal,
a first RAN node according to note 13.
[0103]
(Supplementary Note 15)
　the at least one processor is in the setup procedure of the base between the station interface between the first RAN node and the second RAN node, to receive the reference numerology from the second RAN node It is configured,
the first RAN node according to any one of appendices 9-13.
[0104]
(Supplementary Note 16)
　A wireless terminal for use in a wireless communication system, the wireless communication system, the first RAT and the second RAT supported by
　the wireless terminal
　associated with the first RAT at least one radio transceiver configured to communicate with a second RAN node associated with a first radio access network (RAN) node and the second RAT,
　and at least one processor,
comprising a
　at least one processor is a radio resource configuration of the second RAT, via the first RAN node, wherein being configured to receive from the second RAN node,
　the radio resource configuration, the second RAT in shown explicitly or implicitly a different at least one numerology is the reference numerology of the plurality of numerologies supported,
the wireless terminal.
[0105]
(Supplementary Note 17)
　each numerology, the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval length), the length of the subframe (subframe duration), the slot length (slot duration ), number of slots in the subframe (number of slots per subframe), cyclic prefix length (cyclic prefix length), symbol period (symbol duration), and of the number of symbols in the subframe (number of symbols per subframe) comprising at least one,
wireless terminal according to supplementary note 16.
[0106]
(Supplementary Note 18)
　the at least one processor is configured to receive the radio resource configuration of and the second RAT to the first RAT and the primary RAT for dual connectivity to secondary RAT,
Appendix wireless terminal according to 16 or 17.
[0107]
(Supplementary Note 19)
　the at least one processor is configured to receive the radio resource configuration from the first RAT for the wireless terminals Inter-RAT handover to the second RAT,
Appendix 16 or wireless terminal according to 17.
[0108]
(Supplementary Note 20)
　The reference numerology defines a reference subframe structure for carriers the second RAT supports,
wireless terminal according to any one of Appendices 16-19.
[0109]
(Supplementary Note 21)
　A method in a second radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, the second RAN node the second associated with RAT,
　the method comprises sending to the second first radio terminal via the RAN node a radio resource configuration of the RAT associated with the first RAT,
　the radio resource configuration, the illustrated explicitly or implicitly a different at least one numerology the plurality of reference numerology of the numerologies supported by the second RAT,
the method.
[0110]
(Supplementary Note 22)
　A method in a first radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, wherein the first RAN node the first associated with RAT,
　the method includes receiving a radio resource configuration of the second RAT from a second RAN node associated with the second RAT, comprising sending the radio resource set in the wireless terminal,
　the radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
the method.
[0111]
(Supplementary Note 23)
　A method in a wireless terminal for use in a wireless communication system, the wireless communication system, the first RAT and the second RAT supported by
　the method, the radio resources of the second RAT setting, via a first radio access network (RAN) node associated with the first RAT, comprises receiving from a second RAN node associated with the second RAT,
　the radio resource setting, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
the method.
[0112]
(Supplementary Note 24)
　A program for causing a process in a computer in the second radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, the second the RAN node is associated with the second RAT,
　the method comprising sending a radio resource configuration of the second RAT to the first wireless terminal via the RAN node associated with a first RAT provided,
　wherein the radio resource configuration, explicitly or implicitly indicating the at least one different numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
the program.
[0113]
(Supplementary Note 25)
　A program for causing a process in a computer in the first radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, the first 's RAN node associated with the first RAT,
　the method comprising: receiving a radio resource configuration of the second RAT from a second RAN node associated with the second RAT, the radio resource configuration comprising sending to the wireless terminal,
　the radio resource configuration, shown explicitly or implicitly a different at least one numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
the program.
[0114]
(Supplementary Note 26)
　A program for causing a process in a computer in a wireless terminal for use in a wireless communication system, the wireless communication system supports a first RAT and a second RAT,
　the method comprising receiving a radio resource configuration of the second RAT, through a first radio access network (RAN) node associated with the first RAT, the second RAN node associated with the second RAT provided that,
　the radio resource configuration, shown explicitly or implicitly a different at least one numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
the program.
[0115]
　This application claims priority based on Japanese Patent Application No. 2017-000798, filed on January 5, 2017, the entire disclosure of which is incorporated herein.
DESCRIPTION OF SYMBOLS
[0116]
1 eNodeB
(eNB) 2 GNodeB
(GNb) 3 User Equipment
(UE) 4 Evolved Packet Core
(EPC) 5 Mobility Management Entity
(MME) 7 5G Core Network
(5G-CN) 1101 RF transceiver
1104 processor
1105 memory
1201 RF transceiver
1203 The baseband processor
1204 application processor
1206 memory

The scope of the claims
[Requested item 1]
　A second radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, the second RAN node is associated with the second RAT,
　the the second RAN node,
　a memory,
　and at least one processor coupled to said memory,
　comprising,
　at least one processor is
　associated with a radio resource configuration of the second RAT to the first RAT It is configured to send to the wireless terminal via the first RAN node,
　the radio resource configuration, explicitly or implicitly a different at least one numerology is the reference numerology of the plurality of numerologies supported by the second RAT manner shown,
the second RAN node.
[Requested item 2]
　Each numerology is the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval length), the length of the subframe (subframe duration), the slot length (slot duration), sub-frame number of slots the inner (number of slots per subframe), cyclic prefix length (cyclic prefix length), at least one symbol period (symbol duration), and the number of symbols in the subframe (number of symbols per subframe) including,
the second RAN node according to claim 1.
[Requested item 3]
　Wherein the at least one processor is said and said second RAT to the first RAT and the primary RAT for dual connectivity to secondary RAT is configured to generate a radio resource configuration,
according to claim 1 or 2 second RAN node according to.
[Requested item 4]
　Wherein the at least one processor is configured to receive a radio bearer setup request from the first RAN node selects at least one numerology corresponding to requirements for radio bearer of the second RAT indicated by the radio bearer setup request , and it is configured to include an explicit or implicitly indicate information elements of at least one numerology selected for the radio resource configuration,
the second RAN node according to claim 3.
[Requested item 5]
　Wherein the at least one processor, said from the first RAT for Inter-RAT handover of the wireless terminal to the second RAT is configured to generate a radio resource configuration,
to claim 1 or 2 second RAN node according.
[Requested item 6]
　It said reference numerology defines a reference subframe structure for carriers the second RAT supported,
a second RAN node according to any one of claims 1 to 5.
[Requested item 7]
　Wherein the at least one processor is in the setup procedure of the base station between the interface between the first RAN node and the second RAN node is configured to notify the reference numerology to the first RAN node ,
the second RAN node according to any one of claims 1-6.
[Requested item 8]
　Wherein the at least one processor, the set of measurement in the carrier according to the reference numerology via the first RAN node is configured to send to the wireless terminal,
the second RAN node according to claim 6 .
[Requested item 9]
　A first radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, wherein the first RAN node associated with the first RAT,
　the first RAN node,
　a memory,
　and at least one processor coupled to said memory,
　comprising,
　at least one processor is
　associated with a radio resource configuration of the second RAT to the second RAT received from the second RAN node, wherein configured to send the radio resource set in the wireless terminal,
　the radio resource configuration, the second plurality being supported by the RAT differ by at least one of the reference numerology of the numerologies explicitly or implicitly indicating the numerology,
the first RAN node.
[Requested item 10]
　Each numerology is the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval length), the length of the subframe (subframe duration), the slot length (slot duration), sub-frame number of slots the inner (number of slots per subframe), cyclic prefix length (cyclic prefix length), at least one symbol period (symbol duration), and the number of symbols in the subframe (number of symbols per subframe) including,
a first RAN node according to claim 9.
[Requested item 11]
　Wherein the at least one processor is configured to receive the radio resource configuration from the second RAN nodes for dual connectivity to the first and RAT as the primary RAT and secondary RAT the second RAT It is,
first RAN node according to claim 9 or 10.
[Requested item 12]
　Wherein the at least one processor is configured to receive the radio resource configuration from the second RAN node from the first RAT for the wireless terminals Inter-RAT handover to the second RAT ,
the first RAN node according to claim 9 or 10.
[Requested item 13]
　It said reference numerology defines a reference subframe structure for carriers the second RAT supports,
a first RAN node according to any one of claims 9-12.
[Requested item 14]
　Wherein the at least one processor, a set of measurement in the carrier according to the reference numerology is configured to send to the wireless terminal,
a first RAN node according to claim 13.
[Requested item 15]
　Wherein the at least one processor is in the setup procedure of the base station between the interface between the first RAN node and the second RAN node is configured to receive the reference numerology from the second RAN node ,
the first RAN node according to any one of claims 9-13.
[Requested item 16]
　A wireless terminal for use in a wireless communication system, the wireless communication system, the first RAT and the second RAT supported by
　the wireless terminal,
　a first radio associated with the first RAT at least one radio transceiver configured to communicate with an access network (RAN) node and a second RAN node associated with the second RAT,
　and at least one processor,
comprising a
　at least one processor the radio resource configuration of the second RAT, via the first RAN node is configured to receive from the second RAN node,
　the radio resource configuration, supported by the second RAT Referring numerology of the plurality of numerologies shown explicitly or implicitly a different at least one numerology and,
wireless terminal.
[Requested item 17]
　Each numerology is the subcarrier spacing (Subcarriers spacing), the system bandwidth (system bandwidth), the length of the transmission time interval (Transmission Time Interval length), the length of the subframe (subframe duration), the slot length (slot duration), sub-frame number of slots the inner (number of slots per subframe), cyclic prefix length (cyclic prefix length), at least one symbol period (symbol duration), and the number of symbols in the subframe (number of symbols per subframe) including,
wireless terminal of claim 16.
[Requested item 18]
　Wherein the at least one processor is said and said second RAT to the first RAT and the primary RAT for dual connectivity to secondary RAT is configured to receive a radio resource configuration,
claim 16 or 17 wireless terminal according to.
[Requested item 19]
　Wherein the at least one processor, said from the first RAT for Inter-RAT handover of the wireless terminal to the second RAT is configured to receive a radio resource configuration,
in claim 16 or 17 wireless terminal according.
[Requested item 20]
　It said reference numerology, the second RAT to define a reference subframe structure for a carrier to support,
wireless terminal according to any one of claims 16-19.
[Requested item 21]
　A method in a second radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, the second RAN node is associated with the second RAT ,
　the method comprises sending to the second first radio terminal via the RAN node a radio resource configuration of the RAT associated with the first RAT,
　the radio resource configuration, the second Referring numerology of the plurality of numerologies supported by RAT explicitly or implicitly indicating the at least one different numerology and,
method.
[Requested item 22]
　A method in a first radio access network (RAN) node for use in a wireless communication system supporting a first RAT and a second RAT, wherein the first RAN node associated with the first RAT ,
　the method includes receiving a radio resource configuration of the second RAT from a second RAN node associated with the second RAT, comprising sending the radio resource set in the wireless terminal,
　the radio resource configuration , the show explicitly or implicitly a different at least one numerology and the plurality of reference numerology of the numerologies supported by the second RAT,
the method.
[Requested item 23]
　A method in a wireless terminal for use in a wireless communication system, the wireless communication system, the first RAT and the second RAT supported by
　the method, a radio resource configuration of the second RAT, the via the first radio access network (RAN) node associated with the first RAT, comprises receiving from a second RAN node associated with the second RAT,
　the radio resource configuration, the It is shown explicitly or implicitly a different at least one numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
the method.
[Requested item 24]
　In the first RAT and the second radio access network (RAN) non-transitory computer readable medium storing a program for causing a process to the computer at the node for use in a second wireless communication system supporting RAT there, the second RAN node is associated with the second RAT,
　the method, via the first RAN node a radio resource configuration of the second RAT associated with the first RAT comprising sending to the wireless terminal,
　the radio resource configuration, the explicitly or implicitly indicating the at least one different numerology and the second reference numerology of the plurality of numerologies supported by RAT,
non-transitory computer-readable media.
[Requested item 25]
　In the first RAT and the first radio access network (RAN) non-transitory computer readable medium storing a program for causing a process to the computer at the node for use in a second wireless communication system supporting RAT there, the first RAN node associated with the first RAT,
　the method comprising: receiving a radio resource configuration of the second RAT from a second RAN node associated with the second RAT the comprising sending a radio resource configuration to the wireless terminal,
　the radio resource configuration, at least one different numerology explicitly or implicitly the the reference numerology of the plurality of numerologies supported by the second RAT shown,
non-transitory computer readable media.
[Requested item 26]
　The non-transitory computer readable medium storing a program for causing a method in a wireless terminal for use in a wireless communication system to the computer, the wireless communication system, supporting a first RAT and a second RAT and,
　the method, the radio resource configuration of the second RAT, through a first radio access network (RAN) node associated with the first RAT, associated with the second RAT comprises receiving from the second RAN node,
　the radio resource configuration, shown explicitly or implicitly a different at least one numerology is the reference numerology of the plurality of numerologies supported by the second RAT,
non transitory computer-readable media.