Technical field
[0001]
The present disclosure relates to communication using a plurality of Radio Access Technology between radio station and a radio terminal (RAT).
BACKGROUND
[0002]
3rd Generation Partnership Project (3GPP) is scheduled to begin in 2016 the standardization work of 5G towards the introduction of after 2020 as 3GPP Release 14. 5G is assumed to be implemented in an innovative development of the combination according to the introduction of the continuous development of LTE and LTE-Advanced (enhancement / evolution) and new 5G air interface (new Radio Access Technology (RAT)) ing. New RAT (New 5G RAT), for example, LTE / LTE-Advanced frequency band continuous development is the subject of (eg, 6 GHz or less) frequency band, for example 10 GHz or more super high frequency band and higher than to support the millimeter-wave band of more than 30 GHz.
[0003]
　High frequency band, it is possible to provide a high-rate communication. However, the coverage of the higher frequency band, due to its frequency characteristics, it is more localized. Thus, while the high frequency band is used to improve the capacity and data rate in a particular area, a wide coverage is provided by the existing low frequency band. That is, in order to secure the New 5G stability RAT communication in the higher frequency band, the low frequency band and a high frequency band, i.e. LTE / LTE-Advanced and New 5G RAT, close (tight) integration (integration) or close interworking is required. Wireless terminal supporting 5G (5G User Equipment (UE)) using the Carrier Aggregation (CA) or Dual Connectivity (DC) or techniques improve these, the low frequency band and high frequency band (i.e., LTE / LTE connected to both -Advanced cell and New 5G cell).
[0004]
　Non-Patent Document 1 discloses the architecture of a user plane and control plane for both use LTE air interface (LTE RAT) and the new 5G air interface (New 5G RAT). In some implementations, common (common) Radio Resource Control (RRC) layer and a common Packet Data Convergence Protocol (PDCP) layer (sublayer) are used. Common PDCP layer is connected LTE lower layer (Layers) and the New 5G lower layer (Layers), the user plane data and control plane data through these LTE lower layer and New 5G lower layer transport services the offer to the upper layer. LTE lower layer comprises Radio Link Control (RLC) layer for LTE-RAT, Medium Access Control (MAC) layer, and physical layer. Similarly, New 5G lower layer comprises the RLC layer for the New 5G RAT, a MAC layer and physical layer.
[0005]
　Non-Patent Document 1, further assuming that the common PDCP layer and the common RRC layer are located in the LTE base station, transmitting simultaneously the same control plane message in both the LTE cell and New 5G cell (control plane Diversity), and describes to switch the path of the control plane connection with the LTE cell and New 5G cell (Fast control plane switching). By common PDCP and common RRC layer is used, UE has one control point through any of the plurality of air interfaces (i.e., common RRC layer) may be connected to.
[0006]
　Incidentally, the term "LTE" as used herein, unless otherwise indicated, includes the development of LTE and LTE-Advanced for 5G to allow close interworking with New 5G RAT. Development of such LTE and LTE-Advanced is, LTE-Advanced Pro, LTE +, or also called enhanced LTE (eLTE). Also, the term "5G" or "New 5G" herein, newly introduced air interface (RAT) and a node on this is for a fifth generation mobile communication system (5G), the cell and, It is conveniently used to indicate a protocol layer and the like. The newly introduced air interface (RAT) and a node in this regard is, the cell, and the official name of the protocol layers will be future decisions in the process of standardization work progresses. For example, LTE RAT is called the Primary RAT (P-RAT, pRAT) or Master RAT, New 5G RAT is, Secondary RAT (S-RAT, sRAT) may be referred to as.
CITATION
Patent Document
[0007]
非特許文献1 : Da Silva, I.; Mildh, G.; Rune, J.; Wallentin, P.; Vikberg, J.; Schliwa-Bertling, P.; Rui Fan, "Tight Integration of New 5G Air Interface and LTE to Fulfill 5G Requirements," in Vehicular Technology Conference (VTC Spring), 2015 IEEE 81st, pp.1-5, 11-14 May 2015
Summary of the Invention
Problems that the Invention is to Solve
[0008]
　Inventors have conducted studies with respect to 5G wireless architecture that provides a close interworking LTE RAT and New 5G RAT, we found several problems. For example, Non-Patent Document 1 does not consider the New 5G cell-specific control plane. In some implementations, New 5G cell-specific control plane (CP), a message (eg, assignment of a temporary UE ID, setting of the lower layer, signaling for quality of service management, measurement report) may have be necessary Absent. In some implementations, 5G cell-specific signaling connection (eg, RRC connection, signaling radio bearer (Signaling Radio Bearer (SRB)) might require .new 5G cell-specific control plane (CP), the message transfer, and 5G cell-specific signaling connection, it may be efficient to be transmitted via a New 5G cell rather than LTE cell. for example, one of the 5G requirements that are emphasized are low delay a (low latency), 5G UE can be expected to perform the communication with low delay than LTE cell in New 5G cell.
[0009]
　Therefore, one of the objective to be achieved is the embodiments disclosed herein, in a wireless architecture that provides two different RAT interworking, control over the cell of the RAT is dependent manner using It contributes device that performs transmission of plain message effectively, 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
[0010]
　In a first aspect, the radio station system includes one or more radio stations. The one or more radio stations, and one or more first cell according to the first radio access technology, the one or more second radio access being dependent manner used in addition to the first cell one or more second cells according to the technique and is constructed to provide a single wireless terminal simultaneously. The one or more radio stations, when a predetermined condition is satisfied, is configured to receive a control plane message from transmission or the wireless terminal in the one or more second cell to the radio terminal there. It said control plane message includes both non-access stratum (NAS) message or radio resource control (RRC) message or these. Wherein the predetermined condition is, (a) the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message factors transmission, and (d) the type of the core network associated with the NAS message relates to at least one of.
[0011]
　In a second aspect, 1 or method in a radio station system including a plurality of radio stations,
(a) one or a plurality of first cell according to the first radio access technology, the one or more first cells providing a second radio access technology 1 or more of the second cell according to which is dependent manner used in addition, at the same time one of the wireless terminal, and
(b) If a predetermined condition is satisfied, it, received from transmission or the wireless terminal to the wireless terminal at a control plane message the one or more second cells
including. It said control plane message includes both non-access stratum (NAS) message or radio resource control (RRC) message or these. Wherein the predetermined condition is, (a) the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message factors transmission, and (d) the type of the core network associated with the NAS message relates to at least one of.
[0012]
　In a third aspect, the radio terminal includes a memory, and at least one processor coupled to said memory. Wherein the at least one processor, according to the first and the radio access technology of one or more first cell according to the second radio access technology that is dependently used in addition to the one or more first cells It is configured to communicate with a radio station system comprising simultaneously one or more radio stations in one or more of the second cell. Wherein the at least one processor, when a predetermined condition is satisfied, is configured to receive a control plane message from transmission or the radio station system to the radio station system in the one or more second cells there. It said control plane message includes both non-access stratum (NAS) message or radio resource control (RRC) message or these. Wherein the predetermined condition is, (a) the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message factors transmission, and (d) the type of the core network associated with the NAS message relates to at least one of.
[0013]
　In a fourth aspect, the method, in a wireless terminal
(a) and one or more of the first cell according to the first radio access technology, dependently is used in addition to the one or more first cells that communicate with the second wireless station system comprising simultaneously one or more radio stations in one or more of the second cell according to the radio access technology, and
(b) If a predetermined condition is satisfied, the control plane in-the message the one or more second cells that, to receive from the transmission or the radio station system to the radio station system
including. It said control plane message includes both non-access stratum (NAS) message or radio resource control (RRC) message or these. Wherein the predetermined condition is, (a) the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message factors transmission, and (d) the type of the core network associated with the NAS message relates to at least one of.
[0014]
　In a fifth aspect, the program includes the when loaded into a computer, instructions for performing the method according to the second or fourth aspects described above to a computer (software code).
Effect of the invention
[0015]
　According to the embodiments described above, in the radio architecture that provides two different RAT interworking, transmission contributes device effectively performs that the control plane messages via the cell of the RAT is dependent manner using It can provide methods, and programs.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016]
It is a diagram illustrating a configuration example of a wireless communication network according to FIG. 1 with some embodiments.
It is a diagram illustrating a configuration example of a wireless communication network according to FIG. 2 some embodiments.
It is a diagram illustrating another configuration example of a wireless communication network according to FIG. 3 some embodiments.
Is a diagram illustrating an example of a radio protocol stack according to [4] Some embodiments.
Is a diagram illustrating an example of a radio protocol stack according to [5] Some embodiments.
Is a diagram showing an example of a Layer 2 structure according to [6] Some embodiments.
7 is a sequence diagram showing an example of operation of the wireless terminal and base station according to the first embodiment.
8 is a sequence diagram showing an example of operation of the wireless terminal and base station according to the first embodiment.
9 is a sequence diagram showing an example of operation of the wireless terminal and base station according to the first embodiment.
FIG. 10 is a flowchart showing an example of the operation of the RRC layer according to the first embodiment.
[11] In the second embodiment, a table showing an example of a temporary key key used to generate for encryption / decryption of each radio bearer.
It is a block diagram showing a configuration example of a radio terminal according to FIG. 12 with some embodiments.
13 is a block diagram showing an exemplary configuration of a base station according to some embodiments.
DESCRIPTION OF THE INVENTION
[0017]
　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.
[0018]
　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.
[0019]
　A plurality of embodiments shown below is described the 5G wireless architecture that provides LTE RAT and New 5G RAT close interworking as the main subject. However, these embodiments are not intended to be limited to 5G wireless architecture may be applied to other wireless architecture that provides a close interworking two different RAT.
[0020]

　FIG 1 shows a configuration example of a wireless communication network according to some embodiments including the present embodiment. In the example of FIG. 1, a wireless communication network includes a wireless terminal (UE) 1 and integrated base station (integrated eNB) 2. UE1 is, 5G is UE, using the techniques improved CA or DC, or these, one or more LTE cells (eg, cell 21 and 22) and one or more New 5G cell (eg, cell 23 and 24 to connect to both). Hereinafter, one or more LTE cells and one or more New 5G cell used by 5G UE1, each LTE cell group (cell group (CG)) and is referred to as New 5G CG. Each cell in the LTE CG and New 5G in CG is and activated (activated) by cell set to 5G UE1 by integrated eNB2. In some implementations, the frequency band of the LTE CG (eg, cell 21 and 22) (eg, F1 and F2) are low frequency band (eg, less than 6 GHz), New 5G CG ( eg, cell 23 and 24 frequency band) (eg, F3 and F4) are high frequency band (eg, greater than 6 GHz).
[0021]
　Integrated eNB2 supports 5G, frequency and RAT provides a plurality of cells using different component carriers (CC). In the example of FIG. 1, integrated eNB2 provides LTE cell 21 and 22 and New 5G cells 23 and 24. Integrated eNB2, using technology that improves CA or DC, or these, to communicate with 5G UE1 via both LTE CG (eg, cell 21 and 22) and New 5G CG (eg, cell 23 and 24). Furthermore, integrated eNB2 is connected core network, i.e. Evolved Packet Core (integrated EPC) 41 which is integrated. Integrated EPC41 provides LTE core network functions and new core network functions 5G. In some implementations, integrated eNB2 may be connected to a core network specific to 5G (5G specific EPC42).
[0022]
　As shown in FIG. 2, at least one of the plurality of cells of integrated eNB2 (eg, New 5G cell 23 and 24) remote radio unit 3 may be used to provide. In the configuration of FIG. 2, integrated eNB2 performs digital signal processing for the uplink and downlink signals, the radio unit 3 performs analog signal processing of the physical layer. For example, between the integrated eNB2 and the radio unit 3 is connected by an optical fiber, digital baseband signal using a Common Public Radio Interface (CPRI) standard on the optical fiber is transferred. Arrangement of Figure 2 is called Cloud Radio Access Network (C-RAN). Radio unit 3 is referred to as Remote Radio Head (RRH) or Remote Radio Equipment (RRE). Also, integrated eNB2 responsible for baseband digital signal processing is called a Baseband Unit (BBU). Furthermore, in addition to (e.g. 3GPP, in Small Cell Forum) of the CPRI using front hole (interface) which is a standard defined, any information of Layer 1, 2, 3 (signal including) may be transferred . For example, the form of connection between Sub-layer in between or L2 L1 and L2 at the front holes are also referred to as L2 C-RAN. In this case, integrated eNB2 of 2 Digital Unit (DU), RRH3 is also called Radio Unit (RU).
[0023]
　In the configuration example shown in FIGS. 1 and 2, LTE radio protocol and New 5G wireless protocol is implemented in one node (ie, integrated eNB2). Thus configuration example shown in FIG. 1 and FIG. 2 is referred to as co-located arrangement (deployments) or co-located RAN. In the case of L2 C-RAN configuration, part of the New 5G wireless protocol may be arranged on the RU. Meanwhile, in another configuration example, non co-located arrangement or non co-located RAN may be employed. In Non co-located arrangement, LTE radio protocol and New 5G wireless protocol is provided by two different nodes (eNBs). These two nodes are installed, for example, geographically two different sites away.
[0024]
　Figure 3 shows an example of a non co-located arrangement of a wireless communication network according to some embodiments including the present embodiment. In the example of FIG. 3, a wireless communications network includes a 5G UE1, LTE + eNB 5, and 5G specific eNB 6. LTE + eNB 5 provides a LTE CG (eg, cell 21 and 22), 5G specific eNB 6 provides New 5G CG (eg, cell 23 and 24). LTE + eNB 5 is connected to the 5G specific eNB 6 through a communication line such as an optical fiber link or point-to-point radio link, base station between interfaces 301 5G on (eg, were developed (enhanced) X2 interface) specific eNB 6 to communicate with. LTE + eNB 5 and 5G specific eNB 6, in order to be able to connect to both the LTE CG and 5G CG using techniques improved CA or DC or them 5G UE1, operates (interwork) in conjunction with each other .
[0025]
　Figure 4 shows an example of a radio protocol stack 5G UE1 and integrated eNB2 supports. Radio protocol stack 400 shown in FIG. 4 includes an integrated (integrated) RRC layer 401 and integrated PDCP layer (sublayer) 402. Integrated RRC layer 401 and integrated PDCP layer 402 may also be respectively referred to as a common (common in) RRC layer and a common PDCP layer. Radio protocol stack 400 further includes an LTE lower layer (Layers) and New 5G lower layer (Layers). LTE lower layer includes LTE RLC layer 403, LTE MAC layer 404 and LTE PHY layer 405,. New 5G lower layer includes New RLC layer 406, New MAC layer 407 and New PHY layer 408,. For Integrated eNB2, some features of the LTE PHY layer 405 (eg, an analog signal processing) may be provided by the RRH for LTE. Similarly, some features of the New PHY layer 408 (eg, an analog signal processing) may be provided by the RRH for New 5G. Moreover, in the case of L2 C-RAN configuration described above, New PHY layer, New MAC layer or New part of the RLC layer function, (and it more subordinate functions) may be provided by RU for New 5G good.
[0026]
　Integrated RRC layer 401 is responsible for control plane function for LTE RAT and New 5G RAT. Main services and functions of the integrated RRC layer 401 include the following:
- transmission of system information for the non-access stratum (NAS) and access stratum (AS),
- paging,
establishing and maintenance-RRC Connection release,
security features including, key management,
set maintenance release-radio bearers
, lower layer protocol (ie, PDCP, RLC, MAC , PHY) settings,
- QoS management,
- UE measurement reporting and setting , and
including the transfer of NAS messages between the · UE and the core network.
[0027]
　Integrated RRC layer 401, management of radio bearers, the control of the encryption / decryption of user plane data (data radio bearers), data encryption control plane (signaling radio bearer) (RRC PDUs) / for control data of the control of the decoding, and control plane (signaling radio bearer) integrity protection of (RRC PDUs) (integrity protection), communicates with the PDCP layer 402 integrated. Further, RRC layer 401 that is integrated controls the LTE RLC layer 403, LTE MAC layer 404 and LTE PHY layer 405,, New RLC layer 406, New MAC layer 407, and New PHY layer 408 is also controlled.
[0028]
　Integrated PDCP layer 402 provides a data radio bearers and signaling radio bearer transfer service data to the upper layer. PDCP layer 402 integrated may receive services from the LTE RLC layer 403 and New RLC layer 406. That, PDCP layer 402 integrated is provided a transfer service of PDCP PDUs via the LTE RAT from LTE RLC layer 403, is provided a transfer service of PDCP PDUs through the New 5G RAT from New RLC layer 406.
[0029]
　Incidentally, as shown in FIG. 4, the radio protocol stack 400 using the PDCP layer 402 integrated, co-located arrangement (FIGS. 1 and 2), but also in non co-located arrangement (FIG. 3) it should be noted that applicable. That is, as shown in FIG. 5, the non co-located arrangement, LTE + eNB 5 is arranged a site 501, RRC layer 401 that is integrated, PDCP layer 402, which is integrated, LTE RLC layer 403, LTE MAC layer 404, and provides the LTE PHY layer 405. On the other hand, 5G specific eNB 6 is disposed in another site 502, provides a New RLC layer 406, New MAC layer 407 and New PHY layer 408,.
[0030]
　In some implementations, 5G specific eNB 6 for use in non co-located arrangement may have a New RRC layer 511 and New PDCP layer 512. Further, 5G specific eNB 6, the core network for 5G UE1 (eg, Integrated EPC41 or 5G specific EPC42) and a control interface or connection (eg, S1-MME interface, S1-U interface) of may have. In some implementations, New RRC layer 511, sets the lower layer 406-408 of New 5G CG (eg, New 5G cell 23 and 24), the system information via a New 5G CG (ie, Master Information Block ( MIB) or System Information Blocks (SIBs) or both these) may be transmitted. New RRC layer 511, sets a signaling radio bearer and 5G UE1, set the lower layer 406-408 and New PDCP layer 512 of the New 5G CG (eg, New 5G cell 23 and 24), through the New 5G CG the RRC message may be received from and 5G UE1 sends to 5G UE1 Te. New RRC layer 511, a core network (eg, Integrated EPC41 or 5G specific EPC42) and may forward the NAS messages between the 5G UE1. New PDCP layer 512, provides an RRC message transfer service through a New 5G lower layer 406-408 in New RRC layer 511.
[0031]
　New RRC layer 511 may be subordinate to the RRC layer 401 that is integrated (i.e., dependency), may be the same control and RRC layer 401 that is integrated (i.e., having the same function) . In the former case (dependency), 5G specific eNB 6 (a New RRC layer 511), in response to an instruction or request LTE + eNB 5 (RRC layer 401 integrated), RRC for New 5G cells (New 5G CG) the configuration information may be generated. 5G specific eNB 6 (a New RRC layer 511) transmits the RRC configuration information LTE + eNB 5 in (integrated RRC layer 401 of) the LTE + eNB 5 is the RRC configuration information to 5G UE1 in the LTE cell (LTE CG) RRC message (eg, RRC Connection Reconfiguration message) that contains may be transmitted. Alternatively, 5G specific eNB 6 (a New RRC layer 511) is a RRC message including the RRC configuration information may be sent to 5G UE1 in New 5G cell.
[0032]
　5G UE1 in order to communicate with the wireless network shown in FIG. 5, may support the protocol stack shown in Figure 4, may support a different protocol stack. For example, 5G UE1 is, the RRC layer (master RRC layer, primary RRC layer) corresponding to the RRC layer 401 that is integrated in the LTE + eNB 5 and ancillary RRC layer corresponding to New RRC layer 511 of the 5G specific eNB6 (sub RRC layer may have a secondary- RRC layer). For example, sub RRC layer may be performed a part of the transmission or reception both (product or restored), or these RRC configuration information master RRC layer controls. For example, 5G UE1 is both RRC configuration information of the LTE cell RRC configuration information and New 5G cells (LTE CG) (New 5G CG), may be received in the LTE cell receives at New 5G cell it may be. Alternatively, 5G UE1 receives the RRC configuration information of the LTE cell (LTE CG) in the LTE cell, the RRC configuration information New 5G cells (New 5G CG) may be received in New 5G cell.
[0033]
　Radio protocol stack shown in FIG. 4 is an example, 5G UE1 and integrated eNB2 may support other protocol stacks. For example, PDCP layer 402 in the integrated 4 is integrated LTE lower layer and New 5G lower layer (cooperation). Alternatively, integrated MAC layer operates to integrate the LTE PHY layer 405 and New PHY layer 408 (coordination) may be used.
[0034]
　Figure 6 shows an example of a Layer 2 structure for uplink according to some embodiments. Incidentally, the layer 2 structure for the downlink is also the name of the transport channel is similar to FIG. 6 except for the several different such. PDCP layer 602 that is integrated as shown in FIG. 6, LTE RLC layer 603, LTE MAC layer 604, New RLC layer 606 and New MAC layer 607, is, PDCP layer 402, which is integrated as shown in FIGS. 4 and 5 , corresponding respectively to the LTE RLC layer 403, LTE MAC layer 404, New RLC layer 406 and New MAC layer 407,.
[0035]
　PDCP layer 602 that is integrated includes one or more PDCP entity. Each PDCP entity carries data for a single radio bearer. Each PDCP entity, depending on whether carrying data from either data radio bearer (DRB) and signaling radio bearer (SRB), is associated with a user plane or control plane. In the example of FIG. 6, PDCP layer 602 that is integrated includes three radio bearer # 1, # 2, and # 3 respectively corresponding to three PDCP entities 6021,6022, and 6023. RB # 1, each of the # 2 and # 3 may be the SRB may be DRB.
[0036]
　The data of the radio bearer # 1 is transmitted LTE CG (eg, LTE cells 21 and 22) via the LTE RAT from 5G UE1 in the integrated eNB2 (or LTE + eNB 5). Therefore, in the following radio bearer # 1 it is sometimes referred to as LTE bearers. RB # 1 is a bearer corresponding to the LTE Release 12 DC of MCG bearer (MCG bearer).
[0037]
　Data radio bearer # 2 is transmitted New 5G CG (eg, New 5G cell 23 and 24) via the New 5G RAT from 5G UE1 in the integrated eNB2 (or 5G specific eNB 6). Therefore, in the following radio bearer # 2 is sometimes referred to as New 5G bearer. Here, if the 5G specific eNB 6 data is transmitted in New 5G CG managing, RB # 2 is a bearer corresponding to the SCG bearer LTE Release 12 DC (SCG bearer). On the other hand, if the integrated eNB2 data is transmitted in New 5G CG managing, RB # 2 may correspond to SCG of side bearers LTE Release 12 DC split bearer (split bearer).
[0038]
　RB # 3 is a bearer corresponding to the LTE Release 12 DC split bearer (split bearer). That is, RB # 3, in order to together use a resource and New 5G CG resources LTE CG, is associated with both a single logical channel and one logical channel of New 5G RAT of LTE RAT. For user data, a logical channel of LTE RAT is a Dedicated Traffic Channel (DTCH). Logical channel New 5G RAT is 5G logical channel for user data corresponding to the DTCH. The radio bearer # 3 in the following, sometimes referred to as split bearer or integrated bearer (integrated bearer).
[0039]
　If due to 5G UE1 uplink transmission, PDCP entity 6021 generates the PDCP PDUs from the data of the radio bearer # 1 (LTE bearer) and sends them to the LTE RLC entity 6031. If by Integrated eNB2 (or LTE + eNB 5) uplink received, PDCP entity 6021 receives the RLC SDUs (PDCP PDUs) from the LTE RLC entity 6031 transmits data of the radio bearer # 1 to the upper layer.
[0040]
　If due to 5G UE1 uplink transmission, PDCP entity 6022 generates the PDCP PDUs from the data of the radio bearer # 2 (New 5G bearer) and sends them to the New RLC entity 6061. If by Integrated eNB2 (or 5G specific eNB 6) uplink received, PDCP entity 6022 receives the RLC SDUs (PDCP PDUs) from New RLC entity 6061 transmits data of the radio bearer # 2 to the upper layer.
[0041]
　If due to 5G UE1 uplink transmission, PDCP entity 6023 generates the PDCP PDUs from the data of the radio bearer # 3 (integrated bearer), to route these PDCP PDUs in LTE RLC entity 6032 or New RLC entity 6062. If by Integrated eNB2 (or LTE + eNB 5 and 5G specific eNB 6) uplink received, PDCP entity 6023, and reordering the PDCP PDUs (RLC SDUs) received from the LTE RLC entity 6032 and New RLC entity 6062, RB # 3 It sends the data to the upper layer.
[0042]
　Each RLC entity of LTE RLC layer 603 and New RLC layer 606, sets the RLC Acknowledged Mode (RLC AM) data transfer or RLC Unacknowledged Mode (RLC UM) data transmission by the integrated RRC entity (RRC entity 401 of FIG. 4) It is to provide transport services PDCP PDUs. If due to 5G UE1 uplink transmission, each RLC entity in LTE RLC layer 603 generates RLC PDUs from PDCP PDUs (RLC SDUs) (i.e., data of the logical channel), MAC entity of the LTE MAC layer 604 6041 send to. Similarly, each RLC entity in New RLC layer 606, RLC PDUs from PDCP PDUs (RLC SDUs) (i.e., data of the logical channel) generates and sends them to the MAC entity 6071 of New MAC layer 607.
[0043]
　In the example of FIG. 6, one MAC entity 6041 is used for the two LTE cells that are set to one 5G UE1 (LTE CG). If due to 5G UE1 uplink transmission, MAC entity 6041, RLC belong to two two logical channels from the RLC entity 6031 and 6032 PDUs to (MAC SDUs) in Transmission Time Interval (TTI) 2 one transport block per multiplexes. Here, two transport blocks per TTI is transmitted to LTE physical layer 405 on the two UL transport channel corresponding to the two LTE cells 21 and 22 (UL-SCHs).
[0044]
　Similarly, one MAC entity 6071 for two New 5G cells set to one 5G UE1 (New 5G CG) is used. If due to 5G UE1 uplink transmission, MAC entity 6071, RLC belong to two two logical channels from the RLC entity 6071 and 6072 PDUs to (MAC SDUs) in Transmission Time Interval (TTI) 2 one transport block per multiplexes. Here, two transport blocks per TTI is sent to the physical layer 408 for New 5G on the two UL transport channels corresponding to two New 5G cells 23 and 24 (UL TrCH).
[0045]
　As already explained, the Layer 2 structure for the downlink is also the name of the transport channel is similar to FIG. 6 except for the several different such. For example, if the downlink reception by the 5G UE1, PDCP entity 6023 of 5G UE1 is to reordering the PDCP PDUs (RLC SDUs) received from the LTE RLC entity 6032 and New RLC entity 6062, a radio bearer # 3 (integrated bearer) It sends the data to the upper layer.
[0046]
　Then the following describes the transmission operation of the control plane (CP), a message according to 5G UE1 and integrated eNB2 according to the present embodiment (or LTE + eNB 5 and 5G specific eNB6). 5G UE1 and base station system, after setting and activation of either New 5G cell is completed, i.e. after the 5G UE1 is available to New 5G cell, sending the CP message (ie, RRC signaling) the It is configured to perform at New 5G cell. 5G UE1 and base station system may switch the cell CP message is sent from the LTE cell to the New 5G cell. Additionally or alternatively, 5G UE1 and base station system may distinguish the cell CP message is sent adaptively between the LTE cell and New 5G cell. Here, CP message includes a NAS message or RRC message, or both. Base station system means the integrated eNB2, or LTE + eNB 5 and 5G specific eNB 6.
[0047]
　More specifically described, 5G UE1, when a predetermined condition is satisfied, configuration New 5G transmission in any of the New 5G cells in CG and CP message to the base station system, or to receive from the base station system It is. Similarly, the base station system, when a predetermined condition is satisfied, and is configured to receive the CP message from transmission or 5G UE1 to 5G UE1 in any of New 5G cells New 5G in CG. Predetermined condition for determining whether to send the LTE CG and New 5G CG the CP message relating to at least one of the following:
(a) CP content or type of the message,
transmission of the (b) CP message type of signaling radio bearers used to,
(c) transmission factor of the CP message, and
(d) the type of the core network associated with the NAS message.
[0048]
　Here, the content or conditions related to the type of (a) CP message, for example, content or type of the CP message that corresponds to a particular content or type (or not applicable) may be used. The specific content or type, for example New request or measurement report of 5G cell for terminal measurements, the terminal's terminal (holdings) information request or report, the security setting information access stratum (AS) about the New 5G cell, response to the aS security activation request or the activation request, new 5G RAT-specific configuration information, and, newly defined by the control information, at least may be either by 3GPP for new 5G cell.
[0049]
　(B) Conditions related to the type of the signaling radio bearers used to send the CP message, for example, that the signaling radio bearers used corresponds to the type of a particular signaling radio bearer (or not applicable) may be used. The classification of certain signaling radio bearers, for example a pre-specified LTE SRB0, SRB1, or it may be one that corresponds to the SRB2, may be a new signaling radio bearer (eg, SRBx).
[0050]
　Conditions related to the transmission factor (c) CP message, for example, a transmission factor of the CP message that corresponds to a particular transmission factor (or not applicable) may be used. Specific transmission factor, for example, radio quality deterioration of the New 5G cells, failure of establishment of the radio link in the LTE cell or New 5G cell, and requests or responses of reestablishment of the radio link from the failure of the establishment of the radio link , at least it may be either.
[0051]
　Conditions related to the type of the core network associated with the (d) NAS message, for example, the core network used for transmission of the NAS message corresponds to the type of a particular core network (or does not fall) may be used. Classification of a particular core network, for example, may be one that is newly introduced for New 5G RAT, it may be a given service or specific core network that has been designated in advance to be used for the function.
[0052]
　In a first implementation, 5G UE1 is, RRC messages depending on whether including New 5G CG within one or more New measurement report message from 5G UE1 about 5G cell (Measurement report message), the RRC message may determine whether to transmit via either New 5G CG and LTE CG. That, 5G UE1, if RRC message including measurement results of the report from 5G UE1 about 1 or more New 5G cell, the RRC message may be transmitted in any cell in New 5G in CG. Base station system, the RRC message may be received in any of the cells in New 5G in CG. On the other hand, 5G UE1, if RRC message including measurement results of the report from 5G UE1 about 1 or more LTE cells may be transmitted in any of the LTE cell the RRC message. Here, the New 5G CG of the transmitted to the measurement results reported and is the to measurements transmitted by LTE CG report instruction of the measurement (eg, MeasConfig IE) defining the or trigger condition measurement report event criteria ( eg, it may be distinguished (or specified) by ReportConfigEUTRA IE). For example, New 5G CG of the cell (eg, PSCell, special cell, SCell) measurement report event that targets are defined, 5G UE1 are all the measurement reports triggered by the measurement report event New 5G CG it may be transmitted in Kano cell. New 5G measurement report event cell target CG may be defined as the Inter-RAT measurement for LTE cell.
[0053]
　In a second implementation, 5G UE1 is, RRC message is 5G UE1 regarding New 5G RAT terminal (holdings) information request message (eg, UE information request message) or terminal (holdings) information report message (eg, UE information depending on whether including response message), it may determine whether to send the RRC messages via either New 5G CG and LTE CG. That, 5G UE1 is, RRC message 5G UE1 terminal (holdings) about New 5G RAT if it contains a report of information (or request), sends the RRC message in any of the cells in New 5G in CG (or received ) it may be. Base station system, the RRC message may be received in any of the cells in New 5G in CG (or transmission). On the other hand, 5G UE1 is, RRC message when including LTE RAT articles 5G UE1 terminal (holdings) information report (or request), may transmit the RRC message in any of the LTE cell (or received) . Furthermore, 5G UE1 is the type of terminal (holdings) information requested or reported, may determine whether to transmit via either New 5G CG and LTE CG. : Terminal type (holdings) information, for example the following at least one, or a combination thereof
, the radio link information on,
information about the random access, and
information on, a movement history.
[0054]
　Information about the radio link, for example, LTE CG (eg, PCell) or New 5G CG (eg, PSCell, Special cell) radio quality degradation in (eg, disconnection of a radio link (Radio Link Failure: RLF)) information, or failure of a radio link establishment (eg, RRC Connection establishment failure: CEF, RRC Connection Re-establishment failure) may be information. For example, information on the radio quality degradation in LTE CG may be required or reported in LTE CG (or New 5G CG). Similarly, information of the radio quality degradation in 5G CG may be required or reported in New 5G CG (or LTE CG). On the other hand, failure information of the radio link establishment may always be required or reported in LTE CG (or New 5G CG). Incidentally, establishment of the radio link, RRC Connection Reconfiguration wireless protocol (eg, RRC, PDCP, RLC, MAC, PHY) may include the steps of setting change. Further, 5G UE1 may fail information of establishment of the radio link in the failure information and New 5G CG of establishment of the radio link in LTE CG to hold separately.
[0055]
　Information about the random access (RACH) may be, for example, a flag indicating that the random access preamble transmission count went up to success, and the contention preamble was detected. For example, information on a random access in LTE CG may be required or reported in LTE CG (or New 5G CG). Similarly, information about the random access in New 5G CG may be required or reported in New 5G CG (or LTE CG). Incidentally, 5G UE1 may preamble transmission times in the preamble transmission count and New 5G CG in LTE CG so as to hold separately.
[0056]
　Information about the movement history (mobility history report), for example, 5G UE1 is (requests received up to the time of reporting of the information) stays the cell information (stay cell information list: VisitedCellInfoList) may be used. Stay cell information list, identification information of the stay the cell (eg, CGI, PCI, Carrier frequency), and at least may include any information (timespent) stay the time to each cell (s). Furthermore, 5G UE1 is, New 5G RAT information specific stay the cell (eg, VisitedCellInfoList-5G, VisitedCellInfoList-SRAT) as, so as to record the history of a particular cell of New 5G cell (eg, PSCell, Special cell) it may be. The stay cell information list for LTE RAT are required or reported in LTE CG stay cell information list for New 5G RAT may be required or reported 5G CG.
[0057]
　In a third implementation, the base station system, RRC messages depending on whether to include security setting information New 5G access for one or more New 5G cells in CG stratum (AS), the RRC message New 5G CG and either may determine the transmission via either LTE CG. That is, the base station system when the RRC message includes an AS security setting information regarding one or more New 5G cell, the RRC message may be transmitted in any cell in New 5G in CG. 5G UE1 is the RRC message may be received in any of the cells in New 5G in CG. On the other hand, the base station system when the RRC message includes an AS security setting information regarding one or more LTE cells may be transmitted in any of the LTE cell the RRC message. Incidentally, the security setting information may be transmitted as a NAS message (NAS PDU).
[0058]
　In a fourth implementation, the base station system, RRC messages depending on whether including activation request of AS security for one or more New 5G cells New 5G in CG, New the RRC message it may determine whether to transmit via either 5G CG and LTE CG. That is, the base station system, RRC message AS security activation request for one or more New 5G cell: if it contains (Security Mode Command SMC), the RRC message either New 5G in CG it may be transmitted in the cell. 5G UE1 is the RRC message may be received in any of the cells in New 5G in CG. On the other hand, the base station system when the RRC message includes an activation request of AS security for one or more LTE cells may be transmitted in any of the LTE cell the RRC message.
[0059]
　In a fifth implementation, 5G UE1 is, RRC messages depending on whether to include a response to AS security activation request for one or more New 5G cell (Security Mode Complete, Security Mode Failure), the RRC message may determine whether to transmit via either New 5G CG and LTE CG. That, 5G UE1, if RRC message includes a response to AS security activation request for one or more New 5G cell, even the RRC message transmitted in any cell in New 5G in CG good. Base station system, the RRC message may be received in any of the cells in New 5G in CG. On the other hand, 5G UE1, if RRC message includes a response to AS security activation request for one or more LTE cells may be transmitted in any of the LTE cell the RRC message.
[0060]
　In the sixth implementation, the base station system, RRC messages New 5G RAT unique setting information depending on whether or not containing (eg, SCG configuration for 5G, Secondary RAT (sRAT) configuration), the RRC message the may determine whether to transmit via either New 5G CG and LTE CG. That is, the base station system when the RRC message includes a configuration information specific to New 5G RAT, the RRC message may be transmitted in any cell in New 5G in CG. 5G UE1 is the RRC message may be received in any of the cells in New 5G in CG. On the other hand, the base station system when the RRC message includes a configuration information specific to LTE RAT, may be transmitted in any of the LTE cell the RRC message. Here, specific configuration information. New 5G RAT, at least one of the following, or may be a combination:
- terminal capability information relating to,
information about the service, and
information about managing-5G CG.
[0061]
　Information about the terminal capabilities, for example, terminal capability relates New 5G RAT (eg, UE-EUTRA-CapabilityAddSRAT, UE-EUTRA-Capability-SRAT) request from the base station system regarding, or supported features in the New 5G cell (or may be a terminal response to the inquiry), these requests in New 5G CG (eg, via UE Capability Enquiry message) and report (eg, may be via UE Capability Information message). Here, to indicate that it is a request of the terminal capabilities in New 5G RAT, as RAT-Type of UE-CapabilityRequest IE, for example, "SRAT" or "eutra2" is defined, may also be used. At least a portion of the terminal capabilities in New 5G RAT required to connect to the New 5G cell may be transmitted in the LTE cell.
[0062]
　Information about the service, for example, New 5G control information required to implement the service provided in CG (eg, Radio resource configuration, Service area information, Service availability information, Service type / category information), or the service control related to the content of information (eg, Content information, Scheduling / planning information) may be used. The service referred to here may be a service that may be provided also in the LTE, it may be a service that may be provided only at 5G. Service, for example, Multimedia Broadcast and Multicast Service (MBMS) (MBMS over a Single Frequency Network (MBSFN), single cell point to multipoint (SC-PTM)), Cell Broadcast Service (CBS), Proximity Services (ProSe), Vehicle -to-Everything (V2X) services, or in any of the Mobile Edge Computing (MEC).
[0063]
　Information related to the management of New 5G CG is, for example, a specific cell of New 5G CG (eg, PSCell, Special cell) information about changes (eg, PSCell / Special cell reconfiguration, pSCellToAddMod-r1x) may be used. Additionally or alternatively, the base station system, certain New 5G cell (eg, PSCell, Special cell) (after that is specific 5G cells were ready for use) after setting to 5G UE1, other New 5G cell (eg, 5G SCell) a when or released to set additional to 5G UE1, manage radio resource configuration information of the other New 5G cell (eg, sCellToAddModListSRAT, sCellToReleaseListSRAT, RadioResourceConfigDedicatedSCellSRAT) of New 5G CG it may be transmitted as information about. That is, addition and release of cells in New 5G CG, the information related to changes in specific New 5G cell may be transmitted in any cell in New 5G CG.
[0064]
　Although a specific configuration information to New 5G RAT, basic setting information necessary for 5G UE1 to connect to the New 5G cell (or detection) may be transmitted in the LTE cell. The basic setting information is, for example, (different from the LTE) information relating to the sub-frame structure, information on the TTI length, information about the sampling rate, or may be information about the cell type.
[0065]
　In the sixth implementation, the base station system, RRC messages depending on whether to include control information that is newly defined by 3GPP for New 5G cell, the RRC message New 5G CG and LTE CG which may be used to determine whether to send through. That is, the base station system, if the RRC message including control information to be newly defined for the New 5G cell, the RRC message may be transmitted in any cell in New 5G in CG. 5G UE1 is the RRC message may be received in any of the cells in New 5G in CG. On the other hand, the base station system when the RRC message includes an existing control information for the LTE, may be transmitted in any of the LTE cell the RRC message. Here, the control information for the New 5G cell, at least one of the following, or may be a combination:
Core information about network selection, and
information on an independent operation, New 5G cell.
[0066]
　Information about the core network selection, for example, New 5G RAT new type of the core network associated with the introduction may be (eg, 5G specific EPC42.5G Dedicated Core also called Network (DCN).) Information about. For example, information related to the core network selection, a core network node (eg, MME, S-GW, P-GW) of the identification information (eg, MME ID, MMEC, GUMMEI, MMEGI, GUTI, TAI, TEID), or core request for switching the connection of the network nodes (or notification) (eg, Reroute Command, Reroute request, Reroute indication, DCN selection information, DCN relocation information) may be used. These are the integrated EPC41 to 5G specific EPC42 (or vice versa) is required when switching the connection. Additionally or alternatively, information about the core network selection may be a supplementary information for selecting the 5G specific EPC (5G DCN) 42 (assistance information). The auxiliary information includes, for example, the terminal type (device type), application type (UE usage type), or (recommended) expects information of the core network (expected / preferred CN information), but good. The information about the core network selection may be transmitted as a NAS message (NAS PDU).
[0067]
　Independent Operation (standalone operation) information about the New 5G cell, for example, instead of using the New 5G cell as the secondary cell (SCell) for LTE cell (PCell), settings required for use as a primary cell (PCell) information (eg, Radio resource configuration for 5G / SRAT PCell) may be the, but information requesting or specify the use of the New 5G cell as PCell (eg, Handover to 5G / SRAT cell, Redirection to 5G / SRAT cell) good. Incidentally, these information may be transmitted in a signaling radio bearers to be newly defined (eg, SRBx). Furthermore, information required to set the SRBx, may be transmitted in New 5G cell may be transmitted in the LTE cell.
[0068]
　The implementation of the first to sixth mentioned above, 5G UE1 and base station system, RRC messages depending on whether related to New 5G RAT or New 5G cell, New 5G CG and LTE CG the RRC message to determine whether to send via either. Therefore, 5G UE1 and base station system, the RRC messages related to New 5G RAT or New 5G cell can be exchanged via one of the cells in New 5G in CG. Thus, for example, it contributes to be transmitted in low latency RRC messages related to New 5G RAT or New 5G cell.
[0069]
　In a seventh implementation, 5G UE1, depending on whether or not to transmit via a specific signaling radio bearers associated CP message (ie, RRC messages or NAS messages) to New 5G RAT, the CP message the may determine whether to transmit via either New 5G CG and LTE CG. That, 5G UE1, when sending via specific signaling radio bearers associated with CP message to New 5G RAT, the CP message may be transmitted in any cell in New 5G in CG. Base station system, the CP message may be received in any of the cells in New 5G in CG. Incidentally, specific signaling radio bearer, the LTE SRB0, SRB1, or may be a SRB2, it may be a new signaling radio bearer (eg, SRBx). On the other hand, 5G UE1, when sending via specific signaling radio bearers associated with CP message to LTE RAT, may be transmitted in any of the LTE cell the CP message.
[0070]
　Similarly, in the implementation of the eighth, the base station system, depending on whether or not to transmit via a specific signaling radio bearer associated CP message (ie, RRC messages or NAS messages) to New 5G RAT , the CP message may determine whether to transmit via either New 5G CG and LTE CG. That is, the base station system, when transmitting over a certain signaling radio bearers associated with CP message to New 5G RAT, the CP message may be transmitted in any cell in New 5G in CG. 5G UE1 is the CP message may be received in any of the cells in New 5G in CG. On the other hand, the base station system, when transmitting over a certain signaling radio bearers associated with CP message to LTE RAT, may be transmitted in any of the LTE cell the CP message.
[0071]
　The implementation of the seventh and eighth described above, 5G UE1 and base station system, depending on whether the signaling radio bearers used for the transmission of the CP message is a specific bearer associated with the New 5G RAT and, determining whether to transmit the CP message via either New 5G CG and LTE CG. Therefore, 5G UE1 and base station system, the CP messages related to New 5G RAT or New 5G cell can be exchanged via one of the cells in New 5G in CG. Thus, for example, it contributes to be transmitted in low latency CP messages about New 5G RAT or New 5G cell.
[0072]
　In a ninth implementation, 5G UE1 is, CP message transmission factor (ie, RRC messages or NAS messages) depending on whether the radio quality degradation of either New 5G cell, the CP message New 5G CG and either may determine the transmission via either LTE CG. That, 5G UE1, if CP message is transmitted due to the deterioration of the radio quality of one of New 5G cell, the CP message may be transmitted in any cell in New 5G in CG. Base station system, the CP message may be received in any of the cells in New 5G in CG. Thus, for example, it contributes to be transmitted in low latency CP messages about New 5G RAT or New 5G cell. On the other hand, 5G UE1, when the transmission factor of the CP message is located in the radio quality degradation of any LTE cell may transmit at any one of the LTE cell RRC message including the NAS message.
[0073]
　In a tenth implementation, 5G UE1, depending on whether the core network associated with the NAS message is a new type of the core network associated with the introduction of the New 5G RAT (eg, 5G specific EPC42), the the NAS message may determine whether to transmit via either New 5G CG and LTE CG. That, 5G UE1 is a core network associated with the NAS message when a new type of the core network associated with the introduction of the New 5G RAT, the RRC message including the NAS message either New 5G in CG it may be transmitted in the cell. Base station system, the RRC message including the NAS message may be received in any of the cells in New 5G in CG. Thus, for example, it contributes to be transmitted in low latency NAS messages relating to the core network of a new type with introduction of New 5G RAT. On the other hand, 5G UE1, when the core network associated with the NAS message is another core network (eg, integrated EPC41), the RRC message including the NAS message may be transmitted in any of the LTE cell .
[0074]
　Similarly, in the eleventh implementation, the base station system, depending on whether the core network associated with the NAS message is a new type of the core network associated with the introduction of the New 5G RAT (eg, 5G specific EPC42) and it may determine whether to send the NAS message via either New 5G CG and LTE CG. That is, the base station system, when the core network associated with the NAS message is a core network of a new type with introduction of New 5G RAT, either in New 5G CG encompassing RRC message the NAS message it may be transmitted in the cell. 5G UE1 is an RRC message including the NAS message may be received in any of the cells in New 5G in CG. On the other hand, the base station system, NAS message to the core network other core network associated (eg, integrated EPC41) if it is, be transmitted in either the LTE cell RRC message including the NAS message good.
[0075]
　In implementation of the first to 11 described above, transmission or reception of an RRC message may be performed in a specific cell among the LTE CG or New 5G CG. For example, if the RRC message is sent or received by LTE CG, primary cell (PCell) may be used. Also, if the RRC message is sent or received in New 5G CG, primary secondary cell (PSCell) may be used. It should be noted, also referred to as a special cell (SpCell) summarizes the PCell and PSCell.
[0076]
　In some implementations, LTE + eNB 5 is a CP message or this Information is transmitted in New 5G cell may be transmitted to 5G specific eNB 6. Additionally or alternatively, 5G specific eNB 6 is (transmitted ie from 5G UE1) which is or received is transmitted in New 5G cell CP message or this Information may be transmitted to LTE + eNB 5. Furthermore, 5G specific eNB 6 reveals that between nodes in the core network (integrated EPC41 or 5G specific EPC42) (eg, MME), Control Plane information (CP message (eg, NAS message, S1 Application Protocol (S1AP) Message )) may be transmitted or received.
[0077]
　Figure 7 shows an example of transmitting the control plane information on New 5G cell LTE + eNB 5 is a 5G specific eNB6 (CP message). In step 701A or 701B, 5G specific eNB 6 receives control plane information on New 5G cell (CP message) at least embraces X2 message from LTE + eNB 5. The X2 message can be a DL USER DATA message X2 User Plane Protocol (X2-UP) (step 701A), it may be a DL CONTROL DATA message to be newly defined. The X2 message may be a X2 AP Message Transfer message X2AP (step 701B). Alternatively, the X2 message, SeNB Modification Request message (eg, MeNB to SeNB Container) defined for Dual Connectivity may be a newly defined as X2 message (eg, SeNB Configuration Request message) may be used.
[0078]
　Additionally or alternatively, 5G specific eNB 6 includes the S1AP message including control plane information on New 5G cell may be received from integrated EPC41 (eg, MME7) or 5G specific EPC42 (step 702). The S1AP message, MME Configuration Transfer message - di, MME Direct Information Transfer message, or any other S1AP message. In step 703, 5G specific eNB6 is, LTE + eNB5, integrated EPC41, or received from the 5G specific EPC42, the RRC Connection Reconfiguration message including control plane information on New 5G cell (CP message), 5G UE1 in New 5G cell to send to.
[0079]
　Figure 8 shows an example of 5G specific eNB 6 transmits a control plane information on New 5G cell LTE + eNB 5 (CP message). In step 801A or 801B, 5G specific eNB 6 transmits control plane information on New 5G cell (CP message) at least embraces X2 message to LTE + eNB 5. The X2 message may be a X2AP Message Transfer Message (step 801A). Alternatively, the X2 message may be a SeNB Modification Required message defined for Dual Connectivity (step 801B).
[0080]
　LTE + eNB 5, in response to reception of the X2 message, may be initiated SeNB Modification procedure. For example, LTE + eNB 5 may, SeNB Modification Request message (RRC Container: including SCG-ConfigInfo) a may send the 5G specific eNB 6 (step 802). In response to receiving the SeNB Modification Request message, 5G specific eNB 6 includes, SeNB Modification Request Acknowledge message (RRC Container: including SCG-Config) may be transmitted to LTE + eNB 5 (steps 803). In step 803, 5G specific eNB 6 may transmit control plane information about 5G cell LTE + eNB 5.
[0081]
　5G specific eNB 6 includes the S1AP message including control plane information on New 5G cell may be received from integrated EPC41 (eg, MME7) or 5G specific EPC42 (step 804). Incidentally, 5G specific eNB 6, in response to receiving a control plane information about 5G cells from integrated EPC41 or 5G specific EPC42, may be performed step 801A or 801B.
[0082]
　In step 805, 5G specific eNB 6 includes the RRC Connection Reconfiguration message including control plane information on New 5G cell (CP message) to the 5G UE1 in New 5G cell.
[0083]
　9, 5G specific eNB 6 indicates another example for transmitting control plane information on New 5G cell LTE + eNB 5 (CP message). In step 901, 5G specific eNB 6 receives from 5G UE1 in 5G cell control plane information. In step 902, 5G specific eNB 6 transmits the X2 message including at least part of the control plane information received from the 5G UE1 in LTE + eNB 5. The X2 message, for example, also may in X2AP Message Transfer message, newly defined by X2 message (eg, SeNB Configuration Update message) may be used. Incidentally, 5G specific eNB 6, in response to receiving the control plane information from 5G UE1 generates other control information, the other control information may be transmitted in step 902 to the LTE + eNB 5.
[0084]
　Furthermore, 5G specific eNB 6 may transmit an S1AP message including at least part of the control plane information received from the 5G UE1 to integrated EPC41 (eg, MME7) or 5G specific EPC42 (step 903). The S1AP message, for example, eNB Configuration Transfer message may be an eNB Direct Information Transfer message, or other S1AP message. 5G specific eNB 6, in response to receiving the control plane information from 5G UE1 generates other control information, and transmits the other control information in step 903 to the integrated EPC41 (eg, MME7) or 5G specific EPC42 it may be.
[0085]
　Figure 10 is a flow chart illustrating an example of a transmission operation of CP messages by 5G UE1 and base station system (processing 1000). In step 1001, RRC layer (ie, RRC layer 401 or New RRC layer 511 integrated) generates an RRC message. The RRC message, RRC message carrying the NAS message (eg, UL Information Transfer message, DL Information Transfer message) may be used.
[0086]
　In step 1002, RRC layer, (a) content or type of the RRC message, the type of the signaling radio bearers used to send the (b) the RRC message, (c) transmission factor of the RRC message, or (d ) according to the type of the core network associated with the NAS message to be included in the RRC message, to determine whether to send the RRC messages via either LTE CG and New 5G CG. As already described, RRC layer, for example, if the content or the type of the RRC message related to New 5G RAT or New 5G cell, be transmitted via any of New 5G cell the RRC message good.
[0087]
　In step 1003, RRC layer sends the message to the PDCP entity corresponding to the cell for RRC messages transmitted determined in step 1002. Thus, 5G UE1 and base station system can control to send the NAS message to be encompassed RRC message or to via which of LTE CG and New 5G CG.
[0088]

　An example of a wireless communication network and a wireless protocol stack according to the present embodiment is the same as Figures 1-6. In the present embodiment, PDCP layer temporary key used by each PDCP entity (ie, integrated PDCP layer 602 or New PDCP layer 512) within (eg, K UPenc , K RRCin ) the derivation for (derivation) the key K eNB selection of is described. These temporary keys are used, for example, by the PDCP entity for the user plane (UP) Toraffiku and encryption of RRC traffic (ciphering) and decryption (deciphering). These temporary key, the key K by 5G UE1 eNB is derived from. Similarly, these temporary key, the key K by integrated eNB2, LTE + eNB 5, or 5G specific eNB 6 eNB is derived from.
[0089]
　In some implementations, 5G UE1 and integrated eNB2 (or LTE + eNB 5 and 5G specific eNB 6), the first key K to a certain bearer type encryption / decryption of data radio bearers (bearer type) eNB using and the other second key sub-K for encryption / decryption of data radio bearers other bearer type (bearer type) eNB may be used. Second key sub-K eNB , the key SK is used for the SCG bearers in Dual Connectivity (DC) eNB as with the first key K eNB may be derived from.
[0090]
　For example, as shown in FIG. 11, 5G UE1 and integrated eNB2 (or LTE + eNB 5 and 5G specific eNB 6) is (radio bearer 6 # 1) LTE bearer and integrated bearer (RB # 3 in FIG. 6 first key K for encryption / decryption of data) eNB using, New 5G bearer (second key sub-K for encryption / decryption of data radio bearer # 2) of FIG. 6 eNB may also be used.
[0091]
　For example, in the case of Co-located arrangement (FIGS. 1 and 2), 5G UE1 and integrated eNB2, the first key K when sending an RRC message in LTE bearers eNB using the RRC message in New 5G bearer the same first key K also when transmitting eNB may be used. In contrast, in the case of non co-located arrangement (FIG. 3), 5G UE1 and LTE + eNB 5 has a first key K when sending an RRC message in LTE bearers eNB using, 5G UE1 and 5G specific eNB 6 the second key sub-K when sending an RRC message in New 5G bearer eNB may be used.
[0092]
　Then, in the following, 5G UE1 according to embodiments described above, as well as integrated eNB2, LTE + eNB 5, and an example of the configuration of the 5G specific eNB 6 will be described. Figure 12 is a block diagram showing a configuration example of 5G UE1. LTE transceiver 1201 to communicate with the integrated eNB2 (or LTE + eNB 5), performs analog RF signal processing relating LTE RAT PHY layer. Analog RF signal processing performed by the LTE transceiver 1301 includes a frequency up-conversion, the frequency down-conversion, and amplification. LTE transceiver 1201 is coupled to an antenna 1202, and a baseband processor 1205. That, LTE transceiver 1201 receives the modulated symbol data (or OFDM symbol data) from the baseband processor 1205, generates a transmission RF signal and provides a transmit RF signal to the antenna 1202. Also, LTE transceiver 1201 generates a baseband received signal based on the reception RF signal received by an antenna 1202, and supplies it to the baseband processor 1205.
[0093]
　New 5G transceivers 1203 to communicate with the integrated eNB2 (or 5G specific eNB 6), performs analog RF signal processing relating to New 5G RAT PHY layer. New 5G transceiver 1203 is coupled to an antenna 1204, and a baseband processor 1205.
[0094]
　Baseband processor 1205 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 the packet including communication management signaling) concerning communications.
[0095]
　For example, in the case of LTE and LTE-Advanced, a digital baseband signal processing by a baseband processor 1205, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, includes a signal processing of the MAC layer, and a PHY layer But good. The control plane processing by baseband processor 1205, Non-Access Stratum (NAS) protocol, RRC protocol, and may include a process of MAC CE.
[0096]
　Baseband processor 1205, a digital baseband signal processing modem processor to perform (eg, Digital Signal Processor (DSP)) and protocol stack processor for performing control plane processing (eg, Central Processing Unit (CPU), or Micro Processing it may include Unit (MPU)). In this case, the protocol stack processor for performing control plane processing may be shared with an application processor 1206 which will be described later.
[0097]
　Application processor 1206, CPU, MPU, also referred to as a microprocessor or processor cores. Application processor 1206 may include a plurality of processors (multiple processor cores). Application processor 1206 executes the memory 1208 or illustrated which do not result system read from the memory a software program (Operating System (OS)) and various application programs (e.g., the communication application for acquiring metering data or sensing data) by, for realizing various functions of the 5G UE1.
[0098]
　In some implementations, as indicated by the dashed line (1207) in FIG. 12, the baseband processor 1205 and an application processor 1206 may be integrated on a single chip. In other words, the baseband processor 1205 and an application processor 1206 may be implemented as a single System on Chip (SoC) device 1207. SoC devices, sometimes referred to as system Large Scale Integration (LSI) or chipset.
[0099]
　Memory 1208 is a volatile memory or nonvolatile memory, or a combination thereof. Memory 1208 may include a physically independent plurality of memory devices. 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. For example, memory 1208, a baseband processor 1205, an application processor 1206, and may contain accessible external memory device from SoC1207. Memory 1208, within baseband processor 1205, within the application processor 1206, or may include an integrated chip memory device within SoC1207. Furthermore, memory 1208 may include a memory in the Universal Integrated Circuit Card (UICC).
[0100]
　Memory 1208 may store one or more software modules (computer program) 1209 containing instructions and data for processing by the 5G UE1 described in several embodiments described above. In some implementations, the baseband processor 1205 or the application processor 1206, the software modules 1209 and executes from the memory 1208, may be configured to perform processing of 5G UE1 described in the above embodiments good.
[0101]
　Figure 13 is a block diagram showing a configuration example of integrated eNB2 according to the embodiment described above. Referring to FIG. 13, eNB2 is, LTE transceiver 1301, New 5G transceiver 1303, a network interface 1305, a processor 1306, and memory 1307. LTE transceiver 1301 to communicate with the 5G UE1 via the LTE cell, performs analog RF signal processing relating LTE RAT PHY layer. LTE transceiver 1301 may include a plurality of transceivers. LTE transceiver 1301 is coupled to antenna 1302 and the processor 1306.
[0102]
　New 5G transceivers 1303 to communicate with the 5G UE1 via the New 5G cell, performs analog RF signal processing relating to New 5G RAT PHY layer. New 5G transceiver 1303 is coupled to an antenna 1304, and a baseband processor 1306.
[0103]
　Network interface 1305, integrated EPC41 or 5G specific EPC42 network node (eg, Mobility Management Entity (MME) and Serving Gateway (S-GW)), and is used to communicate with other eNBs. Network interface 1305 may include, for example, a network interface card that complies with the IEEE 802.3 series (NIC).
[0104]
　The processor 1306 performs control plane processing and digital baseband signal processing for wireless communication (data plane processing). For example, in the case of LTE and LTE-Advanced, a digital baseband signal processing by the processor 1306, PDCP layer, RLC layer may include a signal processing of the MAC layer, and the PHY layer. Further, the control plane processing by the processor 1306, S1 protocol, RRC protocol, and may include a process of MAC CE.
[0105]
　Processor 1306 may include multiple processors. For example, the processor 1306, a modem processor (eg, DSP) to perform the digital baseband signal processing and protocol stack processor for performing control plane processing may include (eg, CPU or MPU).
[0106]
　Memory 1307 is constituted by a combination of volatile and nonvolatile memory. Volatile memory is, for example, a SRAM or DRAM, or a combination thereof. The non-volatile memory, for example, MROM, PROM, flash memory, or hard disk drive, or a combination thereof. Memory 1307 may include a storage that is remotely located from the processor 1306. In this case, the processor 1306 may access the memory 1307 via the I / O interfaces that are not network interface 1305 or illustrated.
[0107]
　Memory 1307 may store software modules (computer program) 1308 containing instructions and data for processing by the integrated eNB2 described in several embodiments described above. In some implementations, the processor 1306, by executing the software module 1308 from the memory 1307 may be configured to perform processing of integrated eNB2 described in the above embodiments.
[0108]
　Each configuration of the LTE + eNB 5 and 5G specific eNB 6 may be the same as the configuration of the integrated eNB2 shown in Figure 13. However, LTE + eNB 5 is not necessary to provide New 5G transceiver 1303, 5G specific eNB6 is not necessary to provide the LTE transceiver 1301.
[0109]
　12 and as described with reference to FIG. 13, 5G UE1 according to the embodiment described above, as well as integrated eNB2, LTE + eNB5 and each processor having the 5G specific eNB 6, the computer algorithm described with reference to the drawings executing one or more programs including instructions for causing a. 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.
[0110]

　above embodiments may be implemented independently, or may be implemented in appropriate combination.
[0111]
　The protocol stack described in the above embodiment is one example, other protocol stacks may be employed for the LTE RAT and New 5G RAT interworking. In some implementations, employed for existing LTE / LTE-Advanced for Carrier Aggregation (CA) or Dual protocol stack Connectivity (DC), or a modification of these appropriate is LTE RAT and New 5G RAT interworking it may be. For example, the co-located arrangement or co-located RAN, instead of integrated PDCP layer (sublayer), integrated MAC layer (sub-layer) may be used. In this case, integrated MAC layer controls the LTE PHY layer and New PHY layer may perform CA between the LTE cell and New 5G cell.
[0112]
　The base station described in the above embodiments, the base station system, Integrated eNB2, LTE + eNB5,5G specific eNB6, BBU (or DU), and RRH (or RU) has a radio station or radio access network (RAN) node it can be called. In other words, the base station described in the above embodiments, the base station system, Integrated eNB2, LTE + eNB5,5G specific eNB6, BBU (DU), or processes and operations performed by the RRH (RU) is any one or it may be provided by a plurality of radio stations (RAN node).
[0113]
　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.
[0114]
　For example, some or all of the above embodiments, can be described as the following notes, not limited to the following.
[0115]
(Supplementary Note 1)
　comprises one or more wireless stations,
　the one or more radio stations,
　and one or more first cell according to the first radio access technology, added to the one or more first cells a second radio access technology 1 or more of the second cell according to which is subordinate to use, it is configured to provide a single wireless terminal simultaneously and then
　when a predetermined condition is satisfied, the control plane - messages in the one or more second cell is configured to receive from a transmitter or the radio terminal to the radio terminal,
　the control plane messages, non-access stratum (NAS) message or radio resource control ( RRC) includes a message, or both,
　wherein the predetermined condition is, (a) content or type of the control plane messages, (b) the controller Type of signaling radio bearers used for the transmission of Le plane messages, (c) transmission factor of the control plane messages, and (d) the type of the core network associated with the NAS message, at least one of One on,
the radio station system.
[0116]
(Supplementary Note 2)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, the terminal measures relating to the control plane message is the one or more second cells said when including the measurement results of the report from the wireless terminal about the requested or the one or more second cell to the radio terminal, transmission in the control plane message the one or more second cells or is configured to receive,
the radio station system according to Appendix 1.
[0117]
(Supplementary Note 3)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, the control plane messages of the wireless terminal related to the second radio access technology when it contains a report of the terminal information from the request or the wireless terminal to the wireless terminal of the terminal information, the control plane message is configured to transmit or receive in the one or more second cells It is,
radio station system according to Appendix 1.
[0118]
(Supplementary Note 4)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, the control plane messages for the one or more second cells access in cases involving security setting information stratum (aS), the control plane message is configured to transmit in the one or more second cells,
the radio station system according to Appendix 1.
[0119]
(Supplementary Note 5)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, the control plane messages for the one or more second cells when including the response from the wireless terminal to the access stratum (AS) request or the request to the wireless terminal security activation, transmitting said control plane message in the one or more second cells or is configured to receive,
the radio station system according to Appendix 1.
[0120]
(Supplementary Note 6)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, said control plane message a unique set in the second radio access technology information on, the control plane message is configured to transmit in the one or more second cell if it contains
radio station system according to Appendix 1.
[0121]
(Supplementary Note 7)
　wherein the predetermined condition relates to the type of the signaling radio bearers used for transmission of the control plane messages,
　the one or more radio stations, said control plane message the second radio when sent over a certain signaling radio bearers associated to the access technology, the control plane message is configured to transmit or receive in the one or more second cells,
to appendix 1 radio station system described.
[0122]
(Supplementary Note 8)
　wherein the predetermined condition relates to a transmission factor of the control plane messages,
　the one or more radio stations, the control plane messages of the radio quality of the one or more second cells when transmitted due to the deterioration, the control plane message is configured to receive at said one or more second cells,
the radio station system according to Appendix 1.
[0123]
(Supplementary Note 9)
　wherein the predetermined condition relates to the type of the core network associated with the NAS message,
　the one or more radio stations, a new type in which the core network is associated with the introduction of the second radio access technology core when a network, the said control plane message including NAS messages is configured to transmit or receive in the one or more second cells, the
radio station system according to Appendix 1.
[0124]
(Supplementary Note 10)
　the one or more radio stations, said first of said according to a wireless access technology wireless terminal and for communicating Radio Link Control (RLC) and Medium Access Control (MAC) layer, the second radio said radio Link Control (RLC) for communicating with a wireless terminal and Medium access Control (MAC) layer according to the access technique, a common Packet Data Convergence Protocol (PDCP) layer associated with both of the two RLC layer, said common is configured to provide a common RRC layer associated with the PDCP layer,
a radio station system according to any one of appendices 1-9.
[0125]
(Supplementary Note 11)
　the one or more radio stations, includes the first radio station for a first radio access technology, and a second radio station for the second radio access technology,
　the first second radio station provides the second wireless access technology according to the wireless terminal and for communicating radio Link Control (RLC) and Medium access Control (MAC) layer,
　wherein the first radio station, the first the wireless terminal and radio Link Control for communicating (RLC) and Medium access Control (MAC) layer according to the first radio access technology, said common associated with both of the two RLC layer Packet Data Convergence Protocol (PDCP) layer and said common is configured to provide a common RRC layer associated with the PDCP layer,
a radio station system according to any one of appendices 1-9.
[0126]
(Supplementary Note 12)
　The first radio access technology is continuous development of LTE and LTE-Advanced,
　the second radio access technology is a new 5G radio access technology,
any one of Appendixes 1 to 11 radio station system according to item 1.
[0127]
(Supplementary Note 13)
　A method in a radio station system including one or more radio stations,
　and add a one or more first cell according to the first radio access technology, to the one or more first cells dependently the second radio access technology 1 or more of the second cell according to the used, be provided to one of the wireless terminals at the same time Te, and
　when a predetermined condition is satisfied, the control plane messages it, received from transmission or the wireless terminal to the wireless terminal in the one or more second cells
comprising a
　said control plane message, non-access stratum (NAS) message or radio resource control (RRC) message or include both of these,
　wherein the predetermined condition is, (a) content or type of the control plane messages, (b) the controlling Type of signaling radio bearers used to send the Lumpur plane messages, (c) transmission factor of the control plane messages, and (d) the type of the core network associated with the NAS message, the at least for one,
way.
[0128]
(Supplementary Note 14)
　and a memory,
　at least one processor coupled to the memory,
provided with,
　at least one processor,
　one or a plurality of first cell according to the first radio access technology, the one or more It is configured to communicate simultaneously with one or more wireless stations system including a radio station in one or more of the second cell according to the second radio access technology that is dependently used in addition to the first cell of and
　when a predetermined condition is satisfied, it is configured to receive a control plane message from transmission or the radio station system to the radio station system in the one or more second cells,
　wherein the control plane message includes non-access stratum (NAS) message or radio resource control (RRC) message, or both,
　of the predetermined Conditions, (a) transmitting factor of the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message , and (d) the type of the core network associated with the NAS message relates to at least one of,
a wireless terminal.
[0129]
(Supplementary Note 15)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the at least one processor, wherein the control plane message is a terminal measurements on said one or more second cells when including the measurement results of the report from the wireless terminal about the requested or the one or more second cell to the radio terminal, receiving or transmitting said control plane message in the one or more second cells It is configured to,
wireless terminal according to supplementary note 14.
[0130]
(Supplementary Note 16)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　wherein the at least one processor, terminal information of the wireless terminal wherein the control plane message related to the second radio access technology wherein when containing a report of the terminal information from the request or the wireless terminal to the wireless terminal, the control plane message is configured to receive or transmit in the one or more second cells,
wireless terminal according to supplementary note 14.
[0131]
(Supplementary Note 17)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　wherein the at least one processor, access stratum for said control plane message the one or more second cells when containing the security setting information (aS), and the control plane message is configured to receive at said one or more second cells,
the radio terminal according to Supplementary note 14.
[0132]
(Supplementary Note 18)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　wherein the at least one processor, access stratum for said control plane message the one or more second cells (AS) if it contains a response from the wireless terminal to the security of the activation request or the request to the wireless terminal, receiving or transmitting said control plane message in the one or more second cells It is configured to,
wireless terminal according to supplementary note 14.
[0133]
(Supplementary Note 19)
　wherein the predetermined condition relates to a content or type of the control plane messages,
　the at least one processor, wherein the control plane message comprises specific configuration information to the second radio access technology case, the control plane message is configured to receive at said one or more second cells,
the radio terminal according to Supplementary note 14.
[0134]
(Supplementary Note 20)
　wherein the predetermined condition relates to the type of the signaling radio bearers used for transmission of the control plane messages,
　the at least one processor, wherein the control plane message is the second radio access technology to when it is transmitted via a specific signaling radio bearers associated, said control plane message is configured to receive or transmit in the one or more second cells,
according to Appendix 14 wireless terminal.
[0135]
(Supplementary Note 21)
　wherein the predetermined condition relates to a transmission factor of said control plane message,
　the at least one processor is in the control plane messages of the radio quality of the one or more second cell degradation If sent due to being configured to transmit the control plane message in the one or more second cells,
the radio terminal according to Supplementary note 14.
[0136]
(Supplementary Note 22)
　and the predetermined condition is that the relates type of the core network associated with the NAS message,
　the at least one processor core of a new type with the introduction of the core network and the second radio access technology If a network, the said control plane message including NAS messages is configured to receive or transmit in the one or more second cells,
the radio terminal according to Supplementary note 14.
[0137]
(Supplementary Note 23)
　the at least one processor includes a first wireless accordance with said access technology radio station system and for communicating Radio Link Control (RLC) and Medium Access Control (MAC) layer, the second radio access a common Packet Data Convergence Protocol (PDCP) layer, wherein the radio Link Control (RLC) and Medium Access Control (MAC) layer for communicating with the radio station system, associated with both of the two RLC layer according to the technique, It said common is configured to provide a common RRC layer associated with the PDCP layer,
the radio terminal according to any one of appendices 14-22.
[0138]
(Supplementary Note 24)
　The first radio access technology is continuous development of LTE and LTE-Advanced,
　the second radio access technology is a new 5G radio access technology,
any one of Appendixes 14-23 wireless terminal according to item 1.
[0139]
(Supplementary Note 25)
　A method in a wireless terminal,
　and one or more first cell according to the first radio access technology, the one or more in addition to the first cell dependently second used of communicating with the radio station system comprising simultaneously one or more radio stations in one or more of the second cell according to the radio access technology, and
　when a predetermined condition is satisfied, said control plane message 1 or receiving from the transmission or the radio station system to the radio station system in a plurality of second cells,
comprising a
　said control plane message, non-access stratum (NAS) message or radio resource control (RRC) message or include both of these,
　wherein the predetermined condition is, (a) content or type of the control plane messages, (b) prior to Type of signaling radio bearers used for transmission of serial control plane messages, (c) transmission factor of the control plane messages, and (d) the type of the core network associated with the NAS message, the at least for one,
way.
[0140]
(Supplementary Note 26)
　The non-transitory computer readable medium storing a program for causing the method to a computer in a wireless terminal,
　the method comprising
　the one or more first cell according to the first radio access technology , communicating with the one or more first second radio access technology at the same time one or more wireless stations system including a radio station in one or more of the second cell according to which is dependent manner used in addition to the cell be, and
　when a predetermined condition is satisfied, receiving a control plane message from transmission or the radio station system to the radio station system in the one or more second cells,
comprising a
　said control plane message includes both non-access stratum (NAS) message or radio resource control (RRC) message or these,
　Wherein the predetermined condition is, (a) the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message transmission factor, and (d) the type of the core network associated with the NAS message relates to at least one of, the
non-transitory computer readable media.
[0141]
　This application claims priority based on Japanese Patent Application No. 2016-002879, filed on January 8, 2016, the entire disclosure of which is incorporated herein.
DESCRIPTION OF SYMBOLS
[0142]
1 wireless terminal (5G
UE) 2 base station (integrated
eNB) 3 RRH
5 LTE + eNB
6 5G Specific eNB
41 Integrated EPC
42 5G specific EPC
1201 LTE transceiver
1203 New 5G transceiver
1205 baseband processor
1206 application processor
1208 memory
1301 LTE transceiver
1303 New 5G transceiver
1306 processor
1307 memory

The scope of the claims
[Requested item 1]
It includes one or more wireless stations,
the one or more radio stations,
subordinate and add the one or more first cell according to the first radio access technology, to the one or more first cells according to a second radio access technology used in one or more of the second cell is configured to provide a single wireless terminal simultaneously, and
when a predetermined condition is satisfied, said control plane message It is configured to receive from the transmission or the wireless terminal at one or more of the second cell to the radio terminal,
　the control plane messages, non-access stratum (NAS) message or radio resource control (RRC) message or contain these both,
　wherein the predetermined condition is, (a) content or type, (b) said control play of the control plane messages Type of signaling radio bearers used to send the down message, (c) transmission factor of the control plane messages, and (d) the type of the core associated with the NAS message networks, and at least one of ,
radio station system.
[Requested item 2]
　Wherein the predetermined condition relates to a content or type of the control plane message,
　the wireless terminal of the one or more radio stations, the terminal measures relating to the control plane message is the one or more second cells wherein when including the measurement results of the report from the wireless terminal, the control plane messages to send or receive in the one or more second cells for request or the one or more second cells to is configured,
a radio station system according to claim 1.
[Requested item 3]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, said control plane message is a terminal information of the wireless terminal related to the second radio access technology when it contains a report of the terminal information from the request or the wireless terminal to the wireless terminal, and is configured to transmit or receive the control plane message in the one or more second cells,
claims radio station system according to 1.
[Requested item 4]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, access stratum (AS for the control plane message is the one or more second cells when including security configuration information), the control plane message is configured to transmit in the one or more second cells,
the radio station system according to claim 1.
[Requested item 5]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the one or more radio stations, access stratum (AS for the control plane message is the one or more second cells ) when it contains a response from the wireless terminal to request or the request to the wireless terminal security activation, the control plane messages to send or receive in the one or more second cells is configured,
a radio station system according to claim 1.
[Requested item 6]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　if the one or more radio stations, said control plane message comprises specific configuration information to the second radio access technology is configured to transmit in the control plane message the one or more second cells,
the radio station system according to claim 1.
[Requested item 7]
　Wherein the predetermined condition relates to the type of the signaling radio bearers used for transmission of the control plane messages,
　the one or more radio stations, said control plane message associated with the second radio access technology when sent over a certain signaling radio bearers that are, the control plane message is configured to transmit or receive in the one or more second cells,
according to claim 1 radio station system.
[Requested item 8]
　Wherein the predetermined condition relates to a transmission factor of the control plane messages,
　the one or more radio stations, said control plane message due to the deterioration of the radio quality of the one or more second cells If sent, it is configured to receive at the control plane message the one or more second cells, Te
radio station system according to claim 1.
[Requested item 9]
　Wherein the predetermined condition relates to the type of the core network associated with the NAS message,
　the one or more radio stations, with the new type of the core network where the core network is associated with the introduction of the second radio access technology in some cases, the said control plane message including NAS messages is configured to transmit or receive in the one or more second cells,
the radio station system according to claim 1.
[Requested item 10]
　The one or more radio stations, the said first of the following radio access technology wireless terminal and for communicating Radio Link Control (RLC) and Medium Access Control (MAC) layer, in accordance with the second radio access technology and radio Link Control (RLC) and Medium Access Control (MAC) layer for communicating with a wireless terminal, a common Packet Data Convergence Protocol (PDCP) layer associated with both of the two RLC layer, said common PDCP It is configured to provide a common RRC layer associated with the layer,
a radio station system according to any one of claims 1-9.
[Requested item 11]
　The one or more radio stations, the first radio station for the first radio access technology, and wherein the second radio station for the second radio access technology,
　the second radio station provides the second wireless access technology according to the wireless terminal and for communicating radio Link Control (RLC) and Medium access Control (MAC) layer,
　wherein the first radio station, the first radio access common Packet Data Convergence Protocol (PDCP) layer in which the wireless terminal and radio Link Control (RLC) for communicating and Medium Access Control (MAC) layer, associated with both of the two RLC layer in accordance with the techniques, and the common that it is configured to provide a common RRC layer associated with the PDCP layer,
a radio station system according to any one of claims 1-9.
[Requested item 12]
　The first radio access technology is a continuous development of LTE and LTE-Advanced,
　the second radio access technology is a new 5G radio access technology,
in any one of claims 1 to 11 radio station system described.
[Requested item 13]
　A method in a radio station system including one or more radio stations,
　one or a plurality of first cell according to the first radio access technology dependent manner in addition to the one or more first cells a second radio access technology 1 or more of the second cell according to the used, be provided to one of the wireless terminals at the same time, and
　when a predetermined condition is satisfied, said one or more control plane message the in 2 cells that, to receive from the transmission or the radio terminal to the radio terminal
equipped with,
　the control plane messages, non-access stratum (NAS) message or radio resource control (RRC) message, or both wherein the
　predetermined condition is, (a) content or type, (b) said control play of the control plane messages Type of signaling radio bearers used to send the down message, (c) transmission factor of the control plane messages, and (d) the type of the core associated with the NAS message networks, and at least one of ,
method.
[Requested item 14]
　A memory,
　at least one processor coupled to the memory,
provided with,
　at least one processor,
　one or a plurality of first cell according to the first radio access technology, the one or more first It is configured to communicate with a radio station system comprising simultaneously one or more radio stations in one or more of the second cell according to the second radio access technology that is dependently used in addition to the cell, and
　a predetermined condition when is satisfied, is configured to receive a control plane message from transmission or the radio station system to the radio station system in the one or more second cells,
　wherein the control plane message, Non- access stratum (NAS) message or radio resource control (RRC) message or include both of these,
　wherein the predetermined condition is, (a ) Content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) transmission factor of the control plane messages, and (d) the type of the core network associated with the NAS message relates to at least one of,
a wireless terminal.
[Requested item 15]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the at least one processor, wherein the control plane message to the wireless terminal of the terminal measurements on said one or more second cells If the related request or the one or more second cells including measurement results of the report from the wireless terminal, the control plane message is configured to receive or transmit in the one or more second cells and that,
the wireless terminal of claim 14.
[Requested item 16]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the at least one processor, the wireless terminal of the terminal information of the wireless terminal wherein the control plane message related to the second radio access technology if it contains a request or report of the terminal information from the wireless terminal to, the control plane message is configured to receive or transmit in the one or more second cells,
to claim 14 wireless terminal according.
[Requested item 17]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the at least one processor, wherein the control plane message is access stratum (AS) for the one or more second cells when including security setting information, wherein the control is a plain message is configured to receive at said one or more second cells,
the wireless terminal according to claim 14.
[Requested item 18]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　wherein the at least one processor, access stratum (AS) security for the control plane message is the one or more second cells wherein when including the response from the wireless terminal to request or the request to the wireless terminal activation, it is configured to receive or transmit the control plane message in the one or more second cells and that,
the wireless terminal of claim 14.
[Requested item 19]
　Wherein the predetermined condition relates to a content or type of the control plane messages,
　the at least one processor, in the case including the specific configuration information to the control plane message is the second radio access technology, wherein It is configured to receive the control plane message the one or more second cells,
the wireless terminal according to claim 14.
[Requested item 20]
　Wherein the predetermined condition relates to the type of the signaling radio bearers used for transmission of the control plane messages,
　the at least one processor, wherein the control plane message is associated with the second radio access technology on, the control plane message is configured to receive or transmit in the one or more second cells, when transmitted via a specific signaling radio bearer
radio terminal according to claim 14.
[Requested item 21]
　Wherein the predetermined condition relates to a transmission factor of the control plane messages,
　transmitting the at least one processor, due to the control plane messages of the radio quality of the one or more second cell degradation on, the control plane message is configured to transmit in the one or more second cells, as
the wireless terminal according to claim 14.
[Requested item 22]
　Wherein the predetermined condition relates to the type of the core network associated with the NAS message,
　the at least one processor, when the core network is a core network of a new type with the introduction of the second radio access technology to the said control plane message including NAS messages is configured to receive or transmit in the one or more second cells,
the wireless terminal according to claim 14.
[Requested item 23]
　Wherein the at least one processor, the radio and the first radio access technology in accordance with the radio station system and for communicating Radio Link Control (RLC) and Medium Access Control (MAC) layer, in accordance with the second radio access technology and Radio Link Control (RLC) and Medium Access Control (MAC) layer for communicating with a station system, a common Packet Data Convergence Protocol (PDCP) layer associated with both of the two RLC layer, said common PDCP It is configured to provide a common RRC layer associated with the layer,
the radio terminal according to any one of claims 14-22.
[Requested item 24]
　The first radio access technology is a continuous development of LTE and LTE-Advanced,
　the second radio access technology is a new 5G radio access technology,
in any one of claims 14-23 wireless terminal according.
[Requested item 25]
　A method in a wireless terminal,
　and one or more first cell according to the first radio access technology, the second radio access technology that is dependently used in addition to the one or more first cells 1 or a plurality of the second cell to communicate simultaneously with one or more wireless stations system including a radio station, and according to
　when a predetermined condition is satisfied, said control plane message one or more second of receiving from the transmitting or the radio station system to the radio station system in a cell,
comprising a
　said control plane message, a non-access stratum (NAS) message or radio resource control (RRC) message, or both wherein,
　the predetermined condition is, (a) content or type of the control plane messages, (b) the controller Type of signaling radio bearers used for the transmission of Le plane messages, (c) transmission factor of the control plane messages, and (d) the type of the core network associated with the NAS message, at least one of One on,
way.
[Requested item 26]
　The non-transitory computer readable medium storing a program for causing a method in a wireless terminal to a computer,
　the method comprising
　one or a plurality of first cell according to the first radio access technology, wherein the one or communicate with a radio station system including a second radio access technology at the same time one or more radio stations in one or more of the second cell according to which is dependent manner used in addition to the plurality of first cells, and
　when a predetermined condition is satisfied, receiving a control plane message from transmission or the radio station system in the one or more second cell to the radio station system,
comprising a
　said control plane message is, non-access stratum (NAS) message or radio resource control (RRC) message or include both of these,
　the predetermined conditions Matter, (a) transmitting factor of the content or type of the control plane messages, (b) the type of the signaling radio bearers used for transmission of the control plane messages, (c) said control plane message , and (d) the type of the core network associated with the NAS message relates to at least one of the,
non-transitory computer readable media.