[0001]The present disclosure relates to communication using a plurality of Radio Access Technology between radio station and a radio terminal (RAT).
Background technique
[0002]3rd Generation Partnership Project (3GPP) is scheduled to begin in 2016 the standardization work of 5G towards the introduction of the 2020 transition 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]
　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
Non-Patent Document
[0006]
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
[0007]
　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, the architecture including a common PDCP layer shown in Non-Patent Document 1, eNB has a problem that it is difficult to instruct the UE specific cell to perform uplink (UL) transmission to the UE.
[0008]
　In existing Dual Connectivity, UE is set to the UE sends in which link the UL PDCP Protocol Data Units (PDUs) by Master eNB (MeNB). However, MeNB of DC is only a cell group to transmit the UL PDCP PDUs can be set to the UE. That, MeNB of DC is either one or a plurality of cells comprising Master Cell Group and (MCG) is provided by the MeNB Secondary of Secondary Cell Group consisting of one or more cells provided by (SeNB) (SCG) whether to transmit the UL PDCP PDUs only it is set to the UE. In other words, MeNB of DC can not indicate whether to transmit the UL PDCP PDUs in any particular cell in the MCG or SCG the UE.
[0009]
　Therefore, one of the objective to be achieved is the embodiments disclosed herein, in a wireless architecture that provides a close interworking two different RAT, should the wireless terminal (UE) performs uplink transmission the particular cell eNB is to provide apparatus that allows to instruct the UE, method, and 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, a first wireless protocol stack for communicating with the wireless terminal in one or more of the first cell in accordance with a first radio access technology, one or more in accordance with the second radio access technology a second wireless protocol stack for communicating with the wireless terminal in the second cell, a common Packet Data Convergence protocol (PDCP) layer associated with both of said first and second radio protocol stack via the at least one particular cell at least one is allowed to the radio terminal to be and receive data to transmit the data in the uplink transmission or downlink transmission or the radio bearer used in these both, the It is configured to select a cell unit from among one or more of the first cell and the one or more second cells. Furthermore, the at least one processor is configured to transmit setting information indicating at least one specific cell in the wireless terminal.
[0011]
　In a second aspect, a method in a radio station system including one or more radio stations,
(a) first for communicating with a wireless terminal in one or more of the first cell in accordance with a first radio access technology a radio protocol stack, the second wireless protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology, both of the first and second wireless protocol stack providing a common Packet data Convergence Protocol (PDCP) layer associated,
the data on the radio bearer to be used for both (b) the uplink via the common PDCP layer transmission or downlink transmission, or they at least one particular cell at least one is allowed to the radio terminal to receive the transmitting and data, the one or more Selecting a cell unit from among the first cell and the one or more second cells, and
(c) transmitting a setting information indicating said at least one particular cell in the wireless terminal,
including.
[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 includes a first wireless protocol stack for communicating with the wireless station in one or more of the first cell in accordance with a first radio access technology, one or more of the following second radio access technology providing a second wireless protocol stack for communicating with the radio station in the second cell, and a common Packet Data Convergence protocol (PDCP) layer associated with both of said first and second wireless protocol stack as constructed. Furthermore, the at least one processor, at least one of receiving the and data to transmit the data over a common radio bearer is used for both uplink transmission or downlink transmission, or they have through the PDCP layer is the setting information specified in units of cells of at least one particular cell is allowed to the radio terminal is configured to receive from the radio station. Furthermore, the at least one processor, in accordance with the setting information, and is configured to perform at least one of the received transmission and data of the data on the radio bearer via said at least one particular cell.
[0013]
　In a fourth aspect, a method in a wireless terminal,
(a) a first wireless protocol stack for communicating with the wireless station in one or more of the first cell in accordance with a first radio access technology, a second wireless a second wireless protocol stack for communicating with the radio station in one or more of the second cell according to the access technique, Packet both common associated of the first and second wireless protocol stack Data Convergence protocol (PDCP) providing a layer,
receiving a and data that transmitting data on a radio bearer that is used for both uplink transmission or downlink transmission, or they have through the (b) said common PDCP layer at least one of the child receiving the setting information designated by said each cell at least one particular cell is allowed to the radio terminal from the radio station of , And
in accordance with (c) the setting information, it, performed through said at least one particular cell at least one of the reception of the transmission and the data of the data on the radio bearer
comprises a.
[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 a close interworking two different RAT, a particular cell to the radio terminal (UE) performs uplink transmission eNB is it possible to instruct the UE device, method, and program can be provided.
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 for uplink 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 the operation of the wireless terminals and base stations according to the first embodiment.
Is a diagram illustrating an example of information elements used by the base station to instruct [9] uplink specific cells to be used for transmission to the wireless terminal.
Is a diagram illustrating an example of information elements used by the base station to indicate [10] The uplink specific cells to be used for transmission to the wireless terminal.
[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.
In [12] a second embodiment, a table showing an example of a temporary key key used to generate for encryption / decryption of each radio bearer.
13 is a flowchart illustrating an exemplary operation of the wireless terminal according to the third embodiment.
It is a block diagram showing a configuration example of a radio terminal according to FIG. 14 with some embodiments.
Is a block diagram showing an exemplary configuration of a base station according to FIG. 15 with 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, by using a technique that improves 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 through 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 New5G CG (eg, New 5G cell 23 and 24), the system information via a New5G 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 New5G CG (eg, New 5G cell 23 and 24), RRC via New5G CG messages may be received from the transmitted and 5G UE1 to 5G UE1 to. 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 integrated MAC 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. 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 data radio bearer DRB # 1, DRB # 2, and DRB # corresponding respectively to 3 three PDCP entities 6021,6022, and 6023.
[0036]
　The data of the DRB # 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 DRB # 1 it is hereinafter sometimes referred to as LTE bearers. DRB # 1 is a bearer corresponding to the LTE Release 12 DC of MCG bearer (MCG bearer).
[0037]
　DRB # 2 data are 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 DRB # 2 it is hereinafter sometimes referred to as New 5G bearer. Here, if the 5G specific eNB 6 data is transmitted in New 5G CG managing, DRB # 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, DRB # 2 may correspond to SCG of side bearers LTE Release 12 DC split bearer (split bearer).
[0038]
　DRB # 3 is a bearer corresponding to the split bearer LTE Release 12 DC (split bearer). That, DRB # 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 DRB # 3 hereinafter, 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 DRB # 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 sends a DRB # 1 of data to the upper layer.
[0040]
　If due to 5G UE1 uplink transmission, PDCP entity 6022 generates DRB # 2 PDCP PDUs from the data of (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 DRB # 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 DRB # 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, PDCP PDUs received from the LTE RLC entity 6032 and New RLC entities 6062 and (RLC SDUs) and reordering, the DRB # 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]
　Further, in this embodiment, integrated eNB2 is at least one of receiving a and data that transmitting data radio bearer to be used for uplink transmission or downlink transmission or both these through a common PDCP layer It is configured to indicate a particular cell to be allowed to 5G UE1 to 5G UE1. For example, integrated eNB2 may be configured to indicate a particular cell to 5G UE1 performs uplink (UL) transmission to 5G UE1.
[0046]
　In some implementations, integrated eNB2 has at least one particular cell to transmit data of UL radio bearer is a radio bearer that is used in at least an uplink transmission is allowed to 5G UE1, set to 5G UE1 has been (and activated (activated) has been) one or more LTE cells (eg, LTE cell 21 and 22) and one or more New 5G cell (eg, New 5G cell 23 and 24) cell basis from among It is selected in the (cell-by-cell basis). Then, integrated eNB2 transmits setting information indicating a specific cell selected 5G UE1. In other words, the setting information indicates at least one particular cell that is allowed to 5G UE1 to send (generated from UL radio bearer data by the PDCP layer 402 or 602 that are integrated) UL PDCP PDUs . The process of UL radio bearer data (UL PDCP SDUs or PDUs) to set the particular cell to be transmitted to the 5G UE1 (Addition / Modification), referred to herein as "Cell-specific bearer mapping". If non co-located arrangement is used, LTE + eNB 5 or 5G specific eNB 6 performs on behalf of the process for the Cell-specific bearer mapping "the integrated eNB2.
[0047]
　In some implementations, setting information to inform the 5G UE1 specific cell for UL transmission may be included in the RRC message. Figure 7 shows an example of a transmission operation of the setting information (step 700). At step 701, integrated eNB2 transmits the RRC Connection Reconfiguration message including configuration information for Cell-specific bearer mapping to 5G UE1. Note that FIG. 7 is only an example. For example, the setting information may be contained in other RRC message (eg, RRC Connection Setup message). If non co-located arrangement is used, for example, LTE + eNB 5 may perform the transmission in step 701 of providing RRC layer 401 integrated.
[0048]
　In another some implementations, 5G specific eNB 6 transmits the setting information for the Cell-specific bearer mapping in the New 5G cell inter-node message (eg, SCG-Config) in LTE + eNB 5 by using, LTE + eNB 5 There may send it to 5G UE1. Alternatively, 5G specific eNB 6 may send a RRC Connection Reconfiguration message including configuration information for Cell-specific bearer mapping in New 5G cell 5G UE1. In these cases, 5G specific eNB 6 manages the New 5G cell (i.e., performs RRC configuration) may have a RRC layer for.
[0049]
　Figure 8 shows an example of a transmission operation of setting information for Cell-specific bearer mapping in New 5G cell. In the example of FIG. 8, X2AP message and RRC IE used in the information exchange between eNB in ​​Dual Connectivity (DC) is recycled. In Option 1 shown in FIG. 8, in step 801, LTE + eNB 5 is a DC setting information required for DC (SCG-ConfigInfo), and transmits the 5G specific eNB 6 using SENB ADDITION REQUEST message. In step 802, 5G specific eNB 5 transmits the SENB ADDITION REQUEST ACKNOWLEDGE message containing configuration information for the Cell-specific bearer mapping in 5G cell (Cell-specific bearer mapping for 5G cell) in LTE + eNB 5. Then, in step 803, LTE + eNB 5 transmits an RRC Connection Reconfiguration message including the set information to 5G UE1.
[0050]
　On the other hand, in Option 2 as shown in FIG. 8, in step 811, LTE + eNB 5 is a DC setting information required for DC (SCG-ConfigInfo), and transmits the 5G specific eNB 6 using SENB MODIFICATION REQUEST message. In step 812, 5G specific eNB 6 transmits a SENB MODIFICATION REQUEST ACKNOWLEDGE message to the LTE + eNB 5. Then, in step 813, 5G specific eNB 6 transmits an RRC Connection Reconfiguration message that contains configuration information for Cell-specific bearer mapping in 5G cell (Cell-specific bearer mapping for 5G cell) to 5G UE1. In step 812, 5G specific eNB 6 may transmit configuration information for Cell-specific bearer mapping in 5G cell (Cell-specific bearer mapping for 5G cell) in LTE + eNB 4. Here, in the example of FIG. 8, in Option 1 and 2, SENB ADDITION Although REQUEST procedure and SENB MODIFICATION procedure has been described as an example, each Option is may be used any procedure, other procedure (eg, SeNB Change, Inter-MeNB handover) and other messages (eg, SENB MODIFICATION REQUIRED) may be used. For example, if the other procedure here is SeNB Change, 5G UE1 is the Random Access Procedure with Target 5G specific eNB (not shown), setting information for Cell-specific bearer mapping in 5G cell (Cell- specific bearer mapping for 5G cell) may operate to perform in a particular cell designated.
[0051]
　In one example, the setting information may include bearer related settings UL radio bearer. In this case, bearer configuration includes a specification of a particular cell transmission of data of the UL radio bearer is allowed to 5G UE1. The bearer setting, uplink only, downlink only, or may indicate that both the uplink and downlink are of interest.
[0052]
　Then Hereinafter, specific examples of a method for setting the relationship between the UL radio bearers and the UL radio bearer cell data is transmitted in the (mapped) to 5G UE1 will be described. Figure 9 shows an example of information elements used (information element (IE)) by integrated eNB2, LTE + eNB 5, or 5G specific eNB 6 to indicate a particular cell to be used for UL transmission to 5G UE1 . Specifically, FIG. 9 shows the improvement in drb-toAddModList IE of RRC Connection Reconfiguration message. drb-toAddModList IE contains a list of data radio bearers that are added or modified to 5G UE1. It is shown in FIG. 9 "applicable-ServCellList" (901), for each DRB that is added or modified, a list of the serving cell 5G UE is allowed to transmit the data of the DRB. "Applicable-ServCellList" (901) is, "applicable-ServCellList" As shown in IE (902), including one or more serving cells identifiers (ServCellIndex (903)). Furthermore, "applicable-ServCellList" IE (902) is subject to the bearer direction (ie, uplink only, downlink only, or uplink and both the downlink) information element indicating (drb-direction (904)) it may include a.
[0053]
　In another example, the setting information may include the cell setting for at least one serving cell. In this case, the cell setting indicates whether or not the transmission of the data of each UL radio bearers in each service Bing cell is allowed to 5G UE1. The cell configuration, uplink only, downlink only, or may indicate that both the uplink and downlink are of interest. Further, the cell to which the data reception of the DL radio bearer is a radio bearer that is used in at least downlink transmission is permitted to 5G UE1, it may be different and may be the same as cells to which the data transmission UL radio bearer is allowed .
[0054]
　Figure 10 shows an example of information elements used (information element (IE)) by integrated eNB2, LTE + eNB 5, or 5G specific eNB 6 to indicate a particular cell to be used for UL transmission to 5G UE1 . Specifically, FIG. 10 shows the improvement in SCellToAddModList IE of RRC Connection Reconfiguration message. SCellToAddModList IE contains a list of secondary cells to be added or modified 5G UE1 (SCell (s)). Shown in Figure 10 "available-drbList" (1001), for each secondary cell to be added or modified, 5G UE has a list of good DRB be sent in the cell. "Available-drbList" (1001) is, "available-drbList" As shown in IE (1002), including one or more DRB identifier (DRB-Identity (1004)). Furthermore, "available-drbList" IE (1001) is subject to the bearer direction (ie, uplink only, downlink only, or uplink and both the downlink) information element indicating (drb-direction (1005)) it may include a. Information element indicating the bearer direction may be set only when the RLC AM mode is applied to the bearer. Further, "available-drbList" IE (1001) is, Evolved Packet System (EPS) bearer identifier (eps-BearerIdentity (1003)) may include.
[0055]
　It should be noted, 5GCellToAddModList IE may be defined separately from the CellToAddModList IE. 5GCellToAddModList IE shows a list of 5G cells to be added or modified 5G UE1 (5G Cell (s)). In this case, "available-drbList" (1001) may be included in 5GCellToAddModList IE instead of SCellToAddModList IE. 5GCellToAddModList IE, along with SCellToAddModList IE, or SCellToAddModList IE in place of RRC message (eg, RRC Connection Reconfiguration message, RRC Connection Setup message) may be sent in.
[0056]
　As the above example described with reference to FIGS. 9 and 10, using the RRC configuration to set the relationship between the UL radio bearers and the UL radio bearer cell data is transmitted in the (mapped) to the UE1 it is, for example, the following advantages to be. When a plurality of UL radio bearers are mapped to a combination of different specific cells, respectively, RRC configuration, as in the example of FIGS. 9 and 10, it is possible to easily specify the mapping. For example UL radio bearer A is mapped to the cell a and cell b, if the UL radio bearer B is mapped to the cell b and cell c, RRC setting can specify these mappings according to the example of FIGS. 9 and 10.
[0057]
　Next, a specific example of the operation of the 5G UE1. integrated eNB2, LTE + eNB 5, or in response to an instruction 5G specific eNB6, 5G UE1 limits the cell to be used for transmission of each UL radio bearers. Specifically, RRC layer 401 that is integrated in 5G UE1, to specify the cells to be used for transmission of each UL radio bearer in accordance with an instruction from integrated eNB2, LTE + eNB 5, or 5G specific eNB 6, integrated PDCP layer 602 (402), LTE MAC layer 604 (404), and New controls the MAC layer 607 (407).
[0058]
　Control for integrated PDCP layer 602, or send the UL PDCP PDUs related integrated radio bearer (integrated bearer) to either LTE RLC layer 603 and the New RLC layer 606, PDCP entity for integrated radio bearer comprising instructions to 6023. PDCP entity 6023 routes the UL PDCP PDUs radio bearer integrated according to the instructions of the integrated RRC layer 601 to RLC entities 6062 of the RLC entity 6032 or New for 5G for LTE.
[0059]
　Control for each MAC layer involves instructing should either multiplexed into (one associated with the radio bearer) UL transport block to which cell the RLC PDUs from the RLC entity, to each MAC entity . For example, MAC entity 6041 for LTE, in response to the DRB # 1 of data has been received from the LTE cell 21 (Cell # 1) RRC layer 401 that is integrated with an instruction to be transmitted by, RLC entity 6031 operates to multiplex the RLC PDUs in UL transport block sent to the corresponding physical layer in LTE cell 21 (cell # 1) from, UL trans sent to the physical layer corresponding to the LTE cell 22 (cell # 2) It operates so as not to multiplex the port block. Similarly, MAC entity 6041 for LTE, in response to the data of the DRB # 3 (integrated bearer) has received an instruction to be transmitted in the LTE cell 22 (Cell # 2), from the RLC entity 6032 operates to multiplex the RLC PDUs in UL transport block sent to the corresponding physical layer in LTE cell 22 (cell # 2).
[0060]
　As understood from the above description, in this embodiment, integrated eNB2 is setting information 5G UE1 is specified in units of cells of at least one particular cell to be used for transmitting data of the respective UL radio bearers and it is configured to transmit to 5G UE1. In other words, integrated eNB2 determines whether transmission of data UL radio bearer is enabled (whether or not allowed), is set to 5G UE1 and specifying for each activated cell. Furthermore, 5G UE1 is in accordance with the setting information received from the integrated eNB2, the transmission of each UL radio bearer data (uplink PDCP PDUs), and is configured to perform over a particular cell designated by integrated eNB2 . Thus, in 5G wireless architecture that provides a close interworking LTE RAT and New 5G RAT, a particular cell to 5G UE1 performs UL transmission integrated eNB2 becomes possible to instruct the 5G UE1.
[0061]
　For example, integrated eNB2 sets of N LTE cell and M New 5G cell as a serving cell 5G UE1. Here, N and M is an integer of 2 or more. In this case, integrated eNB2 is an n-number of LTE cells and the m New 5G cell may be selected as the particular cell where it is allowed to use to transmit the data of the UL radio bearers. Here, n is a positive integer smaller than N, m is smaller than M a positive integer.
[0062]
　If non co-located arrangement is used, LTE + eNB 5 or 5G specific eNB 6 transmits the setting information to be specified in units of cells of at least one particular cell for Motoshin data UL radio bearer 5G UE1 . 5G UE1 transmits in accordance with the setting information received from the LTE + eNB 5 or 5G specific eNB 6, the data of each UL radio bearer via the designated specific cell (uplink PDCP PDUs). Thus, in 5G wireless architecture that provides a close interworking LTE RAT and New 5G RAT, to be capable of a certain cell to 5G UE1 performs UL transmission LTE + eNB 5 or 5G specific eNB 6 instructs the 5G UE1 Become.
[0063]
　Here, primarily described with respect to UL radio bearers. However, in some implementations, integrated eNB2, LTE + eNB 5, or 5G specific eNB 6 includes at least one specific cell that 5G UE1 uses to receive the data of the downlink (DL) radio bearer is allowed the setting information specified in the cell units may be transmitted to 5G UE1. 5G UE1 is, integrated eNB2, LTE + eNB5, or in accordance with the setting information received from the 5G specific eNB 6, it may be received via the specified particular cell data (DL PDCP PDUs) of each DL radio bearer. Incidentally, the cell data received in the DL radio bearer is allowed to 5G UE1 may be different or may be the same as cells to which the data transmission UL radio bearer is allowed.
[0064]
　In the present embodiment, 5G UE1 may transmit as follows Scheduling Request (SR) and Buffer Status Report (BSR). In some implementations, 5G UE1 according relation between cells to which the data radio bearer and the radio bearer is transmitted (mapped), may determine the cell SR and BSR are transmitted. That, 5G UE1 is uplink radio bearer (i.e., radio bearer used for at least the uplink transmission) when requesting radio resource allocation for data transmission on the integrated eNB2 (or LTE + eNB 5 or 5G specific eNB 6) to, it may transmit the SR and BSR in certain cell corresponding to mapping of the uplink radio bearer. Alternatively, 5G UE1 is the SR or BSR or both, may be transmitted by any cell in the uplink radio bearer cell group to which the particular cell belongs corresponding to the mapping of (CG). Alternatively, 5G UE1 is the SR or BSR or both, may be transmitted in any of the cells UL is set to 5G UE1 (cell configured with UL).
[0065]
　In the present embodiment, 5G UE1, if at least one or all of the radio bearer is mapped (set) one or more cells is released, may disable autonomously the mapping. Furthermore, as the fall back operation, UE1 is (in response to receiving the UL grant) data radio bearers may operate to transmit in any cell. Similarly, integrated eNB2 (or LTE + eNB 5 or 5G specific eNB 6) disables the mapping may be performed reception operation corresponding to the fall back operation 5G UE1. At this time, integrated eNB2 (or LTE + eNB 5 or 5G specific eNB 6), the core network (eg, Integrated EPC41 or 5G specific EPC42) at least one core network node a message to trigger a change bearer setting in (eg, MME) it may be sent to.
[0066]

　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, temporary key used by each PDCP entity in the PDCP layer 602 (402) (eg, K UPenc , K RRCin ) key K for deriving (derivation) the 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 and integrated eNB2 (or LTE + eNB 5) eNB is derived from.
[0067]
　In some implementations, 5G UE1 and integrated eNB2 (or LTE + eNB 5) is the bearer type first key K for encryption / decryption of data radio bearers (bearer type) eNB using, other bearer type other second key sub-K for encryption / decryption of data radio bearers (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. For example, as shown in FIG. 11, 5G UE1 and integrated eNB2 (or LTE + eNB 5) the encrypted data and the integrated bearer (DRB # 1 in FIG. 6) LTE bearer (DRB # 3 in FIG. 6) / first key K for decrypting eNB using, New 5G bearer second key sub-K for encryption / decryption of data (DRB # 2 in FIG. 6) eNB may be used .
[0068]
　In some implementations, 5G UE1 and integrated eNB2 (or LTE + eNB 5) may select the key based on the relationship between the cells to which the data radio bearer and the radio bearer is transmitted (mapped). Specifically, as shown in FIG. 12, 5G UE1 and integrated eNB2 (or LTE + eNB 5), the first key K for encryption / decryption of data of the radio bearers is transmitted via the LTE CG eNB using the second key sub-K for encryption / decryption of data of the radio bearers is transmitted via a New 5G CG eNB may be used. In the example of FIG. 12, the first key K for its encryption / decryption when the data of the integrated bearer is transmitted by LTE CG eNB is used, the data of the integrated bearer in New 5G CG second key sub-K for its encryption / decryption when sent eNB is used.
[0069]

　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, it is described with respect to the transmission operation by the 5G UE1 of UL PDCP PDUs related (DRB # 3 in FIG. 6) UL radio bearers integrated.
[0070]
　Figure 13 is a flowchart showing an example (process 1300) of operation of the 5G UE1 according to the present embodiment (PDCP layer 602 integrated). In step 1301, 5G UE1 (PDCP layer 602 integrated) generates a UL PDCP PDUs from integrated UL radio bearer data. In step 1302, 5G UE1 (PDCP layer 602 integrated), the transmission of LTE protocol stack (eg, LTE RLC layer 603 and LTE MAC layer 604) of the UL PDCP PDUs and New 5G protocol stack (eg, New RLC layer 606 and whether to perform via either New MAC layer 607), it is determined in consideration of the difference in characteristics in the time domain between the LTE cell and New 5G cell. Characteristics in the time domain may include, for example, TTI length, subframe length, and at least one of a delay time from the reception of the UL grant (grant) to UL transmission.
[0071]
　For example, TTI length of New 5G cell, sub-frame length, and is shorter than that of the at least one LTE cell of the delay time, 5G UE1 may use New 5G cell preferentially. This is because when the size of the data to be transmitted (eg, UL PDCP PDU) is small, is particularly effective. Alternatively, when at least one of the TTI length and subframe length of the LTE cell is longer than that of the New 5G cell, 5G UE1 may use LTE cell preferentially. This, for example, may be effective when the size of the data to be transmitted is large.
[0072]
　Additionally or alternatively, the characteristics of the time domain may include the difference between the sub-frame structure or frame structure between the LTE cell and New 5G cell. For example, for sub-frame of the New 5G cell, in the sub-frame, the uplink (or downlink) physical control channel (eg, PUCCH or PDCCH), the downlink (or uplink) physical control channel, and the uplink (or downlink) physical data channel (eg, PUSCH or PDSCH), at least a plurality of (for example, in that order) may be time multiplexed. In this case, the New 5G cell, the delay time until an UL transmission is expected to be reduced from the reception of the aforementioned UL grant (grant).
[0073]
　Furthermore, it may be different even characteristics between New 5G cells. For example, 5G UE1 is, CA or DC setting is performed, when a plurality of cells are Activated state, allows multiple New 5G cells with different characteristics. In this case, 5G UE1, taking into account the characteristics of the time domain among the plurality of New 5G cell data (eg, UL PDCP PDU) may determine a cell sending the. The difference in characteristics between New 5G cell, for example, sub-frame construction, or Numerology (eg, sub-carrier interval, the sampling rate) may be in the TTI length differences due to different. Alternatively, method to reduce the delay until data transmission of the uplink (eg, Semi-Persistent Scheduling, Contention-based PUSCH transmission) or is set to whether (i.e. 5G UE1 has been applied in the New 5G cell whether or not) may be used.
[0074]
　In a first example, the amount of UL data unsent (total) are taken into account. 5G UE1, when below a first threshold amount of untransmitted UL data (UL PDCP PDUs or SDUs) (total) is designated by the integrated eNB2 (or LTE + eNB 5), transmits the UL data by New 5G cell it may be. That, PDCP layer 602 (PDCP entity 6023), which is integrated 5G UE1 is the UL PDCP PDUs via the New RLC layer 606 (RLC entities 6062) to the New MAC layer 607 (MAC entity 6071).
[0075]
　Additionally or alternatively, 5G UE1, when more than a second threshold amount of untransmitted UL data (UL PDCP PDUs or SDUs) (total) is designated by the integrated eNB2 (or LTE + eNB 5), the UL data may be transmitted in the LTE cell. That, PDCP layer 602 integrated 5G UE1 (PDCP entity 6023) transmits the UL PDCP PDUs to LTE RLC layer 603 LTE MAC layer 604 via a (RLC entities 6032) (MAC entity 6041).
[0076]
　The first threshold value may be the same as the second threshold value. Alternatively, the first threshold may be less than the second threshold value. In this case, 5G UE1, when the amount of UL data unsent (total) is less than the larger and the second threshold value than the first threshold value, the UL data appropriately transmitted in any cell that has received the UL grant it may be.
[0077]
　In a second example, the packet size of the UL data not yet transmitted (each packet) is considered. Packet size, for example, PDCP SDU size, PDCP PDU size or the IP packet size, may be any of. Further, UL unsent data may be a UL data PDCP SN is allocated within UL PDCP buffer may further include a UL data unassigned PDCP SN. 5G UE1 when the packet size unsent UL data (UL PDCP SDUs) is below a third threshold value specified by the integrated eNB2 (or LTE + eNB 5), the UL data can be transmitted in New 5G cell . That, PDCP layer 602 (PDCP entity 6023), which is integrated 5G UE1 is the UL PDCP PDUs via the New RLC layer 606 (RLC entities 6062) to the New MAC layer 607 (MAC entity 6071).
[0078]
　Additionally or alternatively, 5G UE1 when the packet size unsent UL data (UL PDCP SDUs) exceeds a fourth threshold specified by integrated eNB2 (or LTE + eNB 5), the UL data LTE cell in may be transmitted. That, PDCP layer 602 integrated 5G UE1 (PDCP entity 6023) transmits the UL PDCP PDUs to LTE RLC layer 603 LTE MAC layer 604 via a (RLC entities 6032) (MAC entity 6041).
[0079]
　The third threshold may be the same as the fourth threshold. Alternatively, the third threshold value may be smaller than the fourth threshold value. In this case, 5G UE1, when the packet size of the UL data unsent smaller than the fourth threshold value greater than and third threshold, and transmit the UL data appropriately in any of the cell that has received the UL grant good.
[0080]
　In a third example, the 5G RAT of TTI and LTE RAT of TTI differences are taken into account. As an example, TTI of 5G RAT is assumed shorter than TTI of LTE RAT (ie, 1 ms) (eg, 0.2 ms TTI). In this case, 5G UE1, when sending a PDCP PDUs related integrated UL radio bearer may use New 5G RAT preferentially over LTE RAT. In some implementations, PDCP layer 602 integrated 5G UE1 (PDCP entity 6023), in response to receiving the UL grant at substantially the same timing for both LTE cell and New 5G cell, firstly New the UL PDCP PDUs according to UL grant in 5G cell via the New RLC layer 606 (RLC entities 6062) to the New MAC layer 607 (MAC entity 6071). If there are unsent UL PDCP PDUs, PDCP layer 602 integrated 5G UE1 (PDCP entity 6023) further the UL PDCP PDUs according to UL grant for LTE cell via the LTE RLC layer 603 (RLC entities 6032) and it transmits to the LTE MAC layer 604 (MAC entity 6041).
[0081]
　Alternatively, 5G UE1, when sending a PDCP PDUs related integrated UL radio bearer, the LTE RAT may be used preferentially over New 5G RAT. Further, 5G UE1 is for transmission and SRB transmission of Dedicated Scheduling Request (D-SR), it may be subjected to the same processing as the transmission of the above-described UL PDCP PDUs.
[0082]
　The reception of the UL grant at substantially the same timing for both the LTE cell and New 5G cell may be received in the UL grants in the same subframe (or TTI). Alternatively, the reception of the UL grant at substantially the same timing has been notified of the reception of the UL grant PDCP layer 602 from each of the two lower layers of the LTE and New 5G at the same sub-frame (or TTI) it may be determined by. Alternatively, the reception of the UL grant at substantially the same timing may be determined by the PDCP layer 602 is capable of transmitting UL data in the same sub-frame (or time).
[0083]
　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 14 is a block diagram showing a configuration example of 5G UE1. LTE transceiver 1401 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 1401 includes a frequency up-conversion, the frequency down-conversion, and amplification. LTE transceiver 1401 is coupled to an antenna 1402, and a baseband processor 1405. That, LTE transceiver 1401 receives the modulated symbol data (or OFDM symbol data) from the baseband processor 1405, generates a transmission RF signal and provides a transmit RF signal to the antenna 1402. Also, LTE transceiver 1401 to generate a baseband received signal based on the reception RF signal received by an antenna 1402, and supplies it to the baseband processor 1405.
[0084]
　New 5G transceivers 1403 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 1403 is coupled to an antenna 1404, and a baseband processor 1405.
[0085]
　Baseband processor 1405 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.
[0086]
　For example, in the case of LTE and LTE-Advanced, a digital baseband signal processing by a baseband processor 1405, 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 1405, Non-Access Stratum (NAS) protocol, RRC protocol, and may include a process of MAC CE.
[0087]
　Baseband processor 1405, 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 1406 which will be described later.
[0088]
　The application processor 1406, CPU, MPU, also referred to as a microprocessor or processor cores. The application processor 1406 may include a plurality of processors (multiple processor cores). The application processor 1406 may perform memory 1408 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.
[0089]
　In some implementations, as indicated by the dashed line (1407) in FIG. 14, the baseband processor 1405 and an application processor 1406 may be integrated on a single chip. In other words, the baseband processor 1405 and an application processor 1406 may be implemented as a single System on Chip (SoC) device 1407. SoC devices, sometimes referred to as system Large Scale Integration (LSI) or chipset.
[0090]
　Memory 1408 is a volatile memory or nonvolatile memory, or a combination thereof. Memory 1408 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 1408, a baseband processor 1405, an application processor 1406, and may contain accessible external memory device from SoC1407. Memory 1408, within baseband processor 1405, within the application processor 1406, or may include an integrated chip memory device within SoC1407. Furthermore, memory 1408 may include a memory in the Universal Integrated Circuit Card (UICC).
[0091]
　Memory 1408 may store one or more software modules (computer program) 1409 containing instructions and data for processing by the 5G UE1 described in several embodiments described above. In some implementations, the baseband processor 1405 or the application processor 1406, the software modules 1409 and executes from the memory 1408, may be configured to perform processing of 5G UE1 described in the above embodiments good.
[0092]
　Figure 15 is a block diagram showing a configuration example of integrated eNB2 according to the embodiment described above. Referring to FIG. 15, eNB2 is, LTE transceiver 1501, New 5G transceiver 1503, a network interface 1505, a processor 1506, and memory 1507. LTE transceiver 1501 to communicate with the 5G UE1 via the LTE cell, performs analog RF signal processing relating LTE RAT PHY layer. LTE transceiver 1501 may include a plurality of transceivers. LTE transceiver 1501 is coupled to antenna 1502 and the processor 1506.
[0093]
　New 5G transceivers 1503 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 1503 is coupled to an antenna 1504, and a baseband processor 1506.
[0094]
　Network interface 1505, 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 1505 may include, for example, a network interface card that complies with the IEEE 802.3 series (NIC).
[0095]
　The processor 1506 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 1506, 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 1506, S1 protocol, RRC protocol, and may include a process of MAC CE.
[0096]
　Processor 1506 may include multiple processors. For example, the processor 1506, 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).
[0097]
　Memory 1507 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 1507 may include a storage that is remotely located from the processor 1506. In this case, the processor 1506 may access the memory 1507 via the I / O interfaces that are not network interface 1505 or illustrated.
[0098]
　Memory 1507 may store software modules (computer program) 1508 containing instructions and data for processing by the integrated eNB2 described in several embodiments described above. In some implementations, the processor 1506, by executing the software module 1508 from the memory 1507 may be configured to perform processing of integrated eNB2 described in the above embodiments.
[0099]
　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 15. However, LTE + eNB 5 is not necessary to provide New 5G transceiver 1503, 5G specific eNB6 is not necessary to provide the LTE transceiver 1501.
[0100]
　As described with reference to FIGS. 14 and 15, 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.
[0101]

　above embodiments may be implemented independently, or may be implemented in appropriate combination.
[0102]
　The base station described in the above embodiments, Integrated eNB2, LTE + eNB5,5G specific eNB6, BBU (or DU), and RRH (or RU) may be referred to as radio station or radio access network (RAN) node . In other words, the base station described in the above embodiments, Integrated eNB2, LTE + eNB5,5G specific eNB6, BBU (DU), or processes and operations performed by the RRH (RU) is any one or more wireless stations it may be provided by (RAN node).
[0103]
　In some of the embodiments described above, the radio station (eg, Integrated eNB2, LTE + eNB5,5G specific eNB6) is, the UE1 radio bearer in cell units or more cells units are mapped to one or more particular cell It shows an example. In one example, a radio bearer, cell group unit (PUCCH CG) for transmitting uplink control information (UCI), or may be mapped to a plurality of specific cells in the cell group unit regarding uplink transmission timing (TAG).
[0104]
　Additionally or alternatively, the radio station (eg, Integrated eNB2, LTE + eNB5,5G specific eNB6), each data packet flow being transmitted in one radio bearer (eg, IP flow, Serivce Data Flow (SDF)) There may determine the particular cell that is mapped on a cell-by-cell basis. To achieve this, the core network (eg, P-GW, S-GW), the radio station (eg, Integrated eNB2, LTE + eNB5,5G specific eNB6) the data packet to the user plane data to be transmitted to the identification information (flow identification information) for identifying a flow may be given. Radio station, on the basis of the flow identification information may be mapped on a cell-by-cell basis the data packet flow in a particular cell. In other words, the radio station, based on the flow identification information, may select a particular cell in which the data of the data packet flow is transmitted in cell units. Similarly, access stratum (AS) layer 5G UE1 receives user plane data attached flow identification information from the application layer or the NAS layer, based on the flow identification information, the data packet flow it may be mapped by the cell unit in the particular cell. In other words, UE1 of the AS layer, based on the flow identification information, may select a particular cell in which the data of the data packet flow is transmitted in cell units. Flow identification information may be newly defined. Alternatively, Flow Priority Indicator (FPI) can be used as the flow identification information. FPI shows the same bearer (eg, EPS-bearer) priority between a plurality of data packet flows in.
[0105]
　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.
[0106]
　For example, some or all of the above embodiments, can be described as the following notes, not limited to the following.
[0107]
(Supplementary Note 1) 1
　or more provided with a radio station,
　the one or more radio stations,
　the first wireless protocol for communicating with the wireless terminal in one or more of the first cell in accordance with a first radio access technology a stack, and a second radio protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology, associated with both of said first and second wireless protocol stack constructed a common Packet data Convergence Protocol (PDCP) to provide the layer with,
　to transmit data over said common PDCP uplink transmission layer over the or downlink transmission or radio bearers used in these both and at least one particular cell at least one is allowed to the radio terminal to receive data, the one or more first cell及 Wherein 1 or is configured to select a cell unit from among a plurality of second cells,
　wherein the setting information indicating at least one specific cell is configured to transmit to the radio terminal,
the radio station system.
[0108]
(Supplementary Note 2)
　The setting information includes a bearer setting relating to the radio bearer,
　the bearer setup, the cell units of the at least one particular cell transmission of data on the radio bearer is allowed to the radio terminal containing the specified, the
radio station system according to Appendix 1.
[0109]
(Supplementary Note 3)
　The setting information includes the cell setting for at least one serving cell,
　the cell configuration, whether or not the transmission of data on the radio bearer in each service Bing cell is allowed to the radio terminal shown,
the radio station system according to Appendix 1.
[0110]
(Supplementary Note 4)
　wherein each of the first and second radio protocol stack, Medium Access Control (MAC that provides services Radio Link Control (RLC) layer that provides services to the common PDCP layer, and the RLC layer ) containing layer,
radio station system according to any one of appendices 1 to 3.
[0111]
(Supplementary Note 5)
　the one or more first cell and the one or more second cells, wherein the set in the wireless terminal is and the activated cells,
any one of Appendices 1 to 4 radio station system described.
[0112]
(Supplementary Note 6)
　The common PDCP layer,
　is configured to provide a second radio bearer using the first radio bearer, the second wireless protocol stack using said first wireless protocol stack,
　wherein the temporary key for encryption or decryption of the data of the first radio bearer is derived from the first key, the first key the temporary key for encryption or decryption of data of the second radio bearer different second is configured to derive from the key, the
radio station system according to any one of appendices 1 to 5.
[0113]
(Supplementary Note 7)
　The common PDCP layer,
　is configured to provide an integrated radio bearers are used together the first and second radio protocol stack,
　the encryption or decryption of data of the integrated radio bearer temporary key is configured to derive from the first key, for the
radio station system according to Appendix 6.
[0114]
(Supplementary Note 8)
　The common PDCP layer,
　the first and is configured to provide a second integrated bearer together using a wireless protocol stack,
　the transferred over the first wireless protocol stack the temporary key for encryption or decryption of data integrated radio bearer derived from the first key, wherein the integrated radio bearer data encrypted second are transferred via a wireless protocol stack of or a temporary key for decryption is configured to derive from said second key,
the radio station system according to Appendix 6.
[0115]
(Supplementary Note 9)
　A method in a radio station system including one or more radio stations,
　for communicating a wireless terminal in one or more of the first cell and in accordance with a first radio access technology first wireless protocol stack When a second radio protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology, associated with both of said first and second wireless protocol stack providing a common Packet data Convergence Protocol (PDCP) layer,
　the and data transmitting data on a radio bearer to be used for uplink transmission or downlink transmission or both these via the common PDCP layer at least one particular cell at least one is allowed to the radio terminal to receive said one or more first cell及 Selecting a cell unit, and from among the one or more second cells
　transmitting the setting information indicating the at least one particular cell in the wireless terminal,
the method comprising.
[0116]
(Supplementary Note 10)
　The non-transitory computer readable medium storing a program for causing the method to a computer in a radio station system including one or more radio stations,
　the method comprising
　in accordance with the first radio access technology a first wireless protocol stack for communicating with the wireless terminal at one or more first cell, a second for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology a radio protocol stack, providing a common Packet Data Convergence protocol (PDCP) layer associated with both of said first and second radio protocol stack,
　said common uplink through the PDCP layer transmission or it and that the small receiving data to transmitting data on a radio bearer to be used for downlink transmission, or both At least one particular cell, said one or more first cell and selecting a cell unit from among the one or more second cells, and one is allowed to the radio terminal also
　at least setting information indicating one of a particular cell that, to be transmitted to the wireless terminal
comprises a
non-transitory computer readable media.
[0117]
(Supplementary Note 11)
　A wireless terminal,
　a memory and,
　at least one processor coupled to the memory,
provided with,
　at least one processor,
　one or more of the first cell in accordance with a first radio access technology in a first wireless protocol stack for communicating with the radio station, the second radio protocol stack for communicating with the radio station in one or more of the second cell according to the second radio access technology, the first It is configured to provide a common Packet Data Convergence protocol (PDCP) layer associated with both the first and second radio protocol stack,
　the uplink transmission or downlink transmission, or both via the common PDCP layer Huh said wireless terminal is at least one of receiving the and data transmitting data on a radio bearer to be used for The setting information specifying at least one particular cell is allowed in each cell is configured to receive from the radio station,
　in accordance with the setting information, at least one of the received transmission and data of the data on the radio bearer wherein being configured to perform via at least one particular cell,
wireless terminal.
[0118]
(Supplementary Note 12)
　The setting information includes a bearer setting relating to the radio bearer,
　the bearer setup, the cell units of the at least one particular cell transmission of data on the radio bearer is allowed to the radio terminal containing the specified, the
wireless terminal according to supplementary note 11.
[0119]
(Supplementary Note 13)
　The setting information includes the cell setting for at least one serving cell,
　the cell configuration, whether or not the transmission of data on the radio bearer in each service Bing cell is allowed to the radio terminal shown,
wireless terminal according to supplementary note 11.
[0120]
(Supplementary Note 14)
　each of said first and second radio protocol stack, Medium Access Control (MAC that provides services Radio Link Control (RLC) layer that provides services to the common PDCP layer, and the RLC layer ) containing layer,
the radio terminal according to any one of appendices 11-13.
[0121]
(Supplementary Note 15)
　the at least one processor is configured to further provide an integrated Radio Resource Control (RRC) layer,
　the common RRC layer, said to be used for transmission of data over the radio bearer to specify at least one particular cell, said common PDCP layer, and is configured to control each MAC layer of the first and second radio protocol stack,
the wireless terminal according to Appendix 14.
[0122]
(Supplementary Note 16)
　The radio bearer is an integrated radio bearers are used together the first and second wireless protocol stack,
　control over the common PDCP layer by the common RRC layer was the integrated it should be sent uplink PDCP protocol data unit to a radio bearer (PDUs) in either the RLC layer of the first wireless protocol stack RLC layer and the second radio protocol stack, the common PDCP layer comprising instructing,
wireless terminal according to supplementary note 15.
[0123]
(Supplementary Note 17)
　control for each MAC by the common RRC layer includes a should be multiplexed into the uplink transport block of which cell the RLC PDUs for said radio bearer, instructs each MAC entity,
Appendix wireless terminal according to 15 or 16.
[0124]
(Supplementary Note 18)
　each of the one or more first cell and the one or more second cells, wherein the set in the wireless terminal is and activated cells,
any one of Appendices 11-17 wireless terminal according to claim.
[0125]
(Supplementary Note 19)
　said common PDCP layer,
　is configured to provide a second radio bearer using the first radio bearer, the second wireless protocol stack using said first wireless protocol stack,
　wherein the temporary key for encryption or decryption of the data of the first radio bearer is derived from the first key, the first key the temporary key for encryption or decryption of data of the second radio bearer different second is configured to derive from the key, the
wireless terminal according to any one of appendices 11-18.
[0126]
(Supplementary Note 20)
　said common PDCP layer,
　is configured to provide an integrated radio bearers are used together the first and second radio protocol stack,
　the encryption or decryption of data of the integrated radio bearer it has, is configured so as to derive from the first key the temporary key for
the wireless terminal according to supplementary note 19.
[0127]
(Supplementary Note 21)
　said common PDCP layer,
　the first and is configured to provide a second integrated bearer together using a wireless protocol stack,
　the transferred over the first wireless protocol stack the temporary key for encryption or decryption of data integrated radio bearer derived from the first key, wherein the integrated radio bearer data encrypted second are transferred via a wireless protocol stack of or a temporary key for decryption is configured to derive from said second key,
the wireless terminal according to supplementary note 19.
[0128]
(Supplementary Note 22)
　A method in a wireless terminal,
　a first wireless protocol stack for communicating with the wireless station in one or more of the first cell in accordance with a first radio access technology, in accordance with a second radio access technology 1 or more and a second wireless protocol stack for communicating with the radio station in the second cell, the first and second both radio protocol stack to a common associated Packet Data Convergence protocol (PDCP) providing a layer,
　said common uplink transmission via a PDCP layer or downlink transmission, or at least one of the radio receiving the and data transmitting data on a radio bearer to be used for both these receiving setting information that specifies from the radio station at least one particular cell is allowed to the terminal in cell units, and
　the According to the setting information, it, performed through said at least one particular cell at least one of the reception of the transmission and the data of the data on the radio bearer
the method comprising.

claims

Includes one or more wireless stations,
　the one or more radio stations,
　a first wireless protocol stack for communicating with the wireless terminal in one or more of the first cell in accordance with a first radio access technology, the a second wireless protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology, a common Packet associated with both of said first and second wireless protocol stack data Convergence Protocol is configured to provide a (PDCP) layer,
　said common receive and that the data to transmit the data on the uplink transmission or downlink transmission or radio bearers used in these both through the PDCP layer at least one particular cell at least one is allowed to the radio terminal to said one or more first cell and the one or It is configured to select a cell unit from among a plurality of second cells,
　wherein the setting information indicating at least one specific cell is configured to transmit to the radio terminal,
the radio station system.
[Requested item 2]
　The setting information includes a bearer setting relating to the radio bearer,
　the bearer setting, the designation of a cell unit of the at least one particular cell for which data transmission is permitted to the wireless terminal over the radio bearer including,
radio station system according to claim 1.
[Requested item 3]
　The setting information includes a cell setting for at least one serving cell,
　the cell setting indicates whether or not the transmission of data on the radio bearer in each service Bing cell is allowed to the radio terminal,
claim radio station system according to 1.
[Requested item 4]
　Each of said first and second radio protocol stack includes said common Radio Link Control that provide services to the PDCP layer (RLC) layer, and Medium Access Control to provide services to the RLC layer (MAC) layer ,
radio station system according to any one of claims 1 to 3.
[Requested item 5]
　Said one or more first cell and the one or more second cells, wherein a and the activated cells are set in the wireless terminal,
according to any one of claims 1 to 4 radio station system.
[Requested item 6]
　Said common PDCP layer,
　a first radio bearer using the first wireless protocol stack, is configured to provide a second radio bearer using said second wireless protocol stack,
　said first radio a temporary key for bearer encryption or decryption of data derived from the first key, different from the first and the said temporary key to the second radio bearer for encryption or decryption of the data of the first key It is configured to derive from the second key,
the radio station system according to any one of claims 1 to 5.
[Requested item 7]
　It said common PDCP layer,
　is configured to provide an integrated radio bearers are used together the first and second radio protocol stack,
　the integrated temporary for encryption or decryption of data radio bearers and the key is configured to derive from the first key,
the radio station system according to claim 6.
[Requested item 8]
　Said common PDCP layer,
　the first and is configured to provide a second integrated bearer together using a wireless protocol stack,
　the integrated wireless transferred via the first wireless protocol stack the temporary key for encryption or decryption of bearer data derived from the first key, the integrated radio bearer data encrypted or decrypted is transferred via the second wireless protocol stack temporary key is configured to derive from said second key, for
the radio station system according to claim 6.
[Requested item 9]
　A method in a radio station system including one or more radio stations,
　a first wireless protocol stack for communicating with the wireless terminal in one or more of the first cell in accordance with a first radio access technology, the second common Packet Data which a second wireless protocol stack for communicating with the wireless terminal at one or more second cells, associated with both of said first and second radio protocol stack according to the radio access technology Convergence Protocol (PDCP) providing a layer
　of receiving a and data that transmitting data on a radio bearer to be used for uplink transmission or downlink transmission or both these via the common PDCP layer at least at least one particular cell one is allowed to the radio terminal, the one or more first cell and the one or Selecting a cell unit from among a plurality of second cells, and
　that, to transmit the setting information indicating the at least one particular cell in the wireless terminal
method comprising.
[Requested item 10]
　The non-transitory computer readable medium storing a program for causing the method to a computer in a radio station system including one or more radio stations,
　the method comprising
　one or more in accordance with the first radio access technology a first wireless protocol stack for communicating with the wireless terminal in the first cell, the second radio protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology If, to provide a common Packet Data Convergence protocol (PDCP) layer associated with both of said first and second radio protocol stack,
　said common uplink transmission or downlink via the PDCP layer transmission or at least one of the previous receive the and data transmitting data on a radio bearer to be used for both these Serial at least one particular cell is allowed to the radio terminal, selecting a cell unit from among said one or more first cell and the one or more second cells, and
　the at least one specific the setting information indicating a cell to transmit to the radio terminal,
comprises,
non-transitory computer readable media.
[Requested item 11]
　A wireless terminal,
　a memory,
　and at least one processor coupled to said memory
comprises a,
　wherein the at least one processor,
　a radio station in one or more of the first cell in accordance with a first radio access technology a first wireless protocol stack for communicating, a second wireless protocol stack for communicating with the radio station in one or more of the second cell according to the second radio access technology, the first and second is configured to provide a common Packet Data Convergence protocol (PDCP) layer associated with both the radio protocol stack,
　it is used for uplink transmission or downlink transmission, or both via the common PDCP layer small least one of receiving a and data that transmits the data is allowed to the radio terminal on a radio bearer Configured setting information that specifies Kutomo one particular cell for each cell to receive from the radio station,
　in accordance with the setting information, wherein at least one of transmission and reception of data of the data on the radio bearer at least It is configured to perform through a single particular cell,
the radio terminal.
[Requested item 12]
　The setting information includes a bearer setting relating to the radio bearer,
　the bearer setting, the designation of a cell unit of the at least one particular cell for which data transmission is permitted to the wireless terminal over the radio bearer including,
wireless terminal according to claim 11.
[Requested item 13]
　The setting information includes a cell setting for at least one serving cell,
　the cell setting indicates whether or not the transmission of data on the radio bearer in each service Bing cell is allowed to the radio terminal,
claim wireless terminal according to 11.
[Requested item 14]
　Each of said first and second radio protocol stack includes said common Radio Link Control that provide services to the PDCP layer (RLC) layer, and Medium Access Control to provide services to the RLC layer (MAC) layer ,
wireless terminal according to any one of claims 11 to 13.
[Requested item 15]
　Wherein the at least one processor is configured to further provide an integrated Radio Resource Control (RRC) layer,
　the common RRC layer, the at least one specific used for transmission of data over the radio bearer to specify a cell, the common PDCP layer, and the first and second are configured to control each MAC layer of the radio protocol stack,
the wireless terminal according to claim 14.
[Requested item 16]
　The radio bearer, the first and second wireless protocol stack are both integrated radio bearer used,
　control over the common PDCP layer by the common RRC layer up about the integrated radio bearer should be sent to any of the RLC layer of the first radio protocol stack of the RLC layer and the second wireless protocol stack link PDCP protocol data units (PDUs), to instruct said common PDCP layer including,
wireless terminal according to claim 15.
[Requested item 17]
　The control by the common RRC layer for each MAC involves whether to be multiplexed to the uplink transport block of which cell the RLC PDUs for said radio bearer, instructs each MAC entity,
according to claim 15 or 16 wireless terminal according to.
[Requested item 18]
　Each of the one or more first cell and the one or more second cells, wherein the set in the wireless terminal is and the activated cell,
according to any one of claims 11 to 17 of the wireless terminal.
[Requested item 19]
　Said common PDCP layer,
　a first radio bearer using the first wireless protocol stack, is configured to provide a second radio bearer using said second wireless protocol stack,
　said first radio a temporary key for bearer encryption or decryption of data derived from the first key, different from the first and the said temporary key to the second radio bearer for encryption or decryption of the data of the first key It is configured to derive from the second key,
the wireless terminal according to any one of claims 11-18.
[Requested item 20]
　It said common PDCP layer,
　is configured to provide an integrated radio bearers are used together the first and second radio protocol stack,
　the integrated temporary for encryption or decryption of data radio bearers the key is configured to derive from the first key,
the wireless terminal according to claim 19.
[Requested item 21]
　Said common PDCP layer,
　the first and is configured to provide a second integrated bearer together using a wireless protocol stack,
　the integrated wireless transferred via the first wireless protocol stack the temporary key for encryption or decryption of bearer data derived from the first key, the integrated radio bearer data encrypted or decrypted is transferred via the second wireless protocol stack It is configured to derive a temporary key for the second key,
the wireless terminal according to claim 19.
[Requested item 22]
　A method in a wireless terminal,
　a first wireless protocol stack for communicating with the wireless station in one or more of the first cell in accordance with a first radio access technology, one or more in accordance with the second radio access technology providing a second radio protocol stack, and a common Packet Data Convergence protocol (PDCP) layer associated with both of said first and second radio protocol stack for communicating with the radio station in the second cell to it,
　at least one of receiving the and data transmitting data on a radio bearer to be used for uplink transmission or downlink transmission or both these via the common PDCP layer is allowed to the radio terminal that at least one of setting information for specifying a particular cell in the cell unit be received from the radio station, and
　follow the setting information I, I, performed through said at least one particular cell at least one of the reception of the transmission and the data of the data on the radio bearer
the method comprising.
[Requested item 23]
　The non-transitory computer readable medium storing a program for causing a method in a wireless terminal to a computer,
　the method comprising
　communicating with a radio station in one or more of the first cell in accordance with a first radio access technology a first wireless protocol stack for a second wireless protocol stack for communicating with the radio station in one or more of the second cell according to the second radio access technology, the first and second providing a common Packet Data Convergence protocol (PDCP) layer associated with both the radio protocol stack,
　said common uplink through the PDCP layer transmission or downlink transmission or the radio bearer used in these both in at least one at least one of receiving a and data that transmits the data is allowed to the radio terminal One of the setting information specified by each cell a particular cell receiving from the radio station, and
　wherein in accordance with the setting information, the data on the radio bearer transmission and reception of data at least one of said at least one specific It is performed via a cell,
comprising a
non-transitory computer readable media.
[Requested item 24]
　A wireless terminal,
　a memory,
　and at least one processor coupled to said memory
comprises a,
　wherein the at least one processor, and a wireless terminal in one or more of the first cell in accordance with a first radio access technology a first wireless protocol stack for communicating, a second wireless protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology, the first and second It is configured to provide and common associated with both wireless protocol stack Packet Data Convergence protocol (PDCP) layer,
　said common PDCP layer, integration together using the first and second wireless protocol stack It is configured to provide a radio bearer that is to the upper layer,
　wherein the at least one processor is the integrated radio bearer Uplink whether the transmission of the PDCP protocol data units (PDUs) carried through any of the first and second radio protocol stack, the one or the plurality of first cells one or more of the related the difference in characteristics in the time domain between the second cell is configured to be determined in consideration of,
the wireless terminal.
[Requested item 25]
　A method in a wireless terminal,
　a first wireless protocol stack for communicating with the wireless terminal in one or more of the first cell in accordance with a first radio access technology, one or more in accordance with the second radio access technology providing a second radio protocol stack, and a common Packet Data Convergence protocol (PDCP) layer associated with both of said first and second radio protocol stack for communicating with the wireless terminal in the second cell to that, wherein, said common PDCP layer, integrated to provide a radio bearer to the upper layers together using the first and second radio protocol stack; and
　the integrated radio bearer uplink related PDCP whether the transmission of the protocol data unit (PDUs) carried through any of the first and second radio protocol stack, the Or more first cell and that, to be determined in consideration of the difference in characteristics in the time domain between the one or more second cell
method with a.
[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
　communicating a wireless terminal in one or more of the first cell and in accordance with a first radio access technology a first wireless protocol stack for a second wireless protocol stack for communicating with the wireless terminal in one or more of the second cell according to the second radio access technology, the first and second providing a common Packet Data Convergence protocol (PDCP) layer associated with both the radio protocol stack, wherein said common PDCP layer, together using the first and second wireless protocol stack integration providing radio bearers to upper layers; and
　uplink PDCP protocol data relating to the integrated radio bearer Whether the transmission of the knit (PDUs) carried through any of the first and second radio protocol stack, the time region between the one or more first cell and the one or more second cells the determining taking into account the difference in characteristics,
comprising a
non-transitory computer readable media.