0001]The present disclosure relates to wireless communication systems, and more particularly to transmission control of the radio terminal.
BACKGROUND
[0002]3rd Generation Partnership Project (3GPP) has (see Non-Patent Document 1) fifth standardization work generation mobile communication system (5G) as 3GPP Release 14 have started in 2016 towards the introduction of after 2020. 5G is realized by a combination of innovative improvement and development through the introduction of continuous improvement and development of the LTE and LTE-Advanced (enhancement / evolution) and new 5G air interface (new Radio Access Technology (RAT)) It is assumed to be. New RAT, for example, LTE / LTE-Advanced continuous development frequency band of interest (eg, 6 GHz or less) frequencies higher than, for example 10 GHz or more super high frequency band and 30 GHz or more mm to support the sideband.
[0003]
　In this specification, the fifth-generation mobile communication system is also referred to 5G System, or Next Generation (NextGen) System (NG System). New RAT for 5G System is, New Radio (NR), called 5G RAT, or NG RAT. New radio access network for 5G System (Radio Access Network (RAN)) is referred to as 5G-RAN or NextGen RAN (NG RAN). New base station within the 5G-RAN is called NR NodeB (NR NB) or gNodeB (gNB). New core network for 5G System is called 5G Core Network (5G-CN) or NextGen Core (NG Core). Wireless terminal connected to 5G System (User Equipment (UE)) is, 5G UE, called NextGen UE (NG UE) or simply UE. RAT for 5G System, UE, radio access network, core network, the network entity (node), and the official name, such as protocol layer will be future decisions in the process of standardization work progresses.
[0004]
　Also, the term "LTE" as used herein, unless otherwise indicated, includes an improvement and development of the LTE and LTE-Advanced for enabling interworking between 5G System. Improvement and development of the LTE and LTE-Advanced for interworking with 5G System is, LTE-Advanced Pro, LTE +, or also called enhanced LTE (eLTE). Furthermore, "Evolved Packet Core (EPC)" as used herein, "Mobility Management Entity (MME)", "Serving Gateway (S-GW)", and "Packet Data Network (PDN) Gateway (P-GW terminology LTE network or logical entities) "or the like, unless otherwise indicated, includes these improvements and development for enabling interworking between 5G System. Improved EPC, MME, S-GW, and P-GW, for example, enhanced EPC (eEPC), enhanced MME (eMME), enhanced S-GW (eS-GW), and enhanced P-GW (eP-GW ) also called.
[0005]
　In LTE and LTE-Advanced, in order of Quality of Service (QoS) and packet routing, the bearer for each and PDN connection specific QoS class RAN (ie, Evolved Universal Terrestrial RAN (E-UTRAN)) and a core network (ie, used by both EPC). That is, in the Bearer-based QoS (or per-bearer QoS) concept is one or more Evolved Packet System (EPS) bearers are set up between the P-GW of the UE and EPC, the plurality that have the same QoS class service data flow (service data flows (SDFs)) is transferred through one EPS bearer satisfying these QoS. SDF is, Policy and Charging Control (PCC) rule-based SDF template (ie, packet filters) is one or more packet flows that match. Further, for packet routing, each packet to be sent through the EPS bearer can discern whether associated with this packet which bearer (ie, General Packet Radio Service (GPRS) Tunneling Protocol (GTP) tunnel) (The identify ) contains information for.
[0006]
　In contrast, in 5G System, might radio bearer is used in the 5G-RAN, the bearers in an interface between the 5G-CN in and 5G-CN and 5G-RAN has been considered not to be used are (see non-Patent Document 1). Specifically, PDU Flows are defined instead of the EPS bearer, one or more SDFs are mapped to one or more PDU Flows. PDU flow between the user plane termination entity in 5G UE and NG Core (ie, the entity corresponding to the P-GW in the EPC) corresponds to the EPS bearer in EPS Bearer-based QoS concepts. In other words, 5G System is, Bearer-based QoS concept of place in Flow-based QoS (or per-flow QoS) to adopt the concept. In the Flow-based QoS concept, QoS is handled in the PDU flow unit (handled). Therefore, PDU flow is also referred to as a QoS flow. Note that association between the 5G UE and the data network (association) is referred to as PDU session (PDU session). PDU session is a term corresponding to LTE and LTE-Advanced PDN connection (PDN connection). Can be more than one PDU Flows (or QoS Flows) is set in one PDU session.
[0007]
　Furthermore, the 5G System supports network slicing also been studied (see Non-Patent Document 1). Network slicing uses Network Function Virtualization (NFV) technology and software-defined networking (SDN) technology makes it possible to create a logical network having a plurality of virtualization on a physical network. Each of virtualized logical networks, called network slice (network slice) or network slice instance (network slice instance), comprising a logical node (nodes) and functions (functions), certain traffic and it is used for signaling. Both 5G-RAN or 5G-CN, or they have a Slice Selection Function (SSF). SSF, based on information provided by at least one of the 5G UE and 5G-CN, selects one or more network slices suitable for the 5G UE.
[0008]
　Figure 1 shows the basic architecture of the 5G system. UE establishes one or more signaling radio bearers (Signalling Radio Bearers (SRBs)) and one or more data radio bearers (Data Radio Bearers (DRBs)) between the GNb. 5G-CN and gNB establishes a control plane interfaces and user plane interface for the UE. Control plane interface between the 5G-CN and gNB (ie, RAN) is referred to as NG2 interface or NG-c interface, transfer of Non-Access Stratum (NAS) information and control between 5G-CN and GNb It is used for the transfer of information. User plane interface between the 5G-CN and GNb (ie, RAN) is called the NG3 interface or NG-u interface, packets of one or more PDU Flows in the UE the PDU session (or QoS Flows) used to transfer (packets-).
[0009]
　Furthermore, the 5G System, in addition to RRC_CONNECTED state and RRC_IDLE state, a new RRC state is introduced (for example, see Non-Patent Document 1-5). New RRC state is referred to as RRC_INACTIVE state or RRC_INACTIVE_CONNECTED state.
[0010]
　RRC_CONNECTED state and RRC_IDLE state of 5G System, respectively a RRC_CONNECTED state and RRC_IDLE state of LTE with similar characteristics. When UE is RRC_CONNECTED state, maintaining the AS context UE and 5G-RAN, the position of the UE is known by the 5G-RAN at the cell level. UE mobility is RRC_CONNECTED state is handled by a handover controlled by 5G-RAN. On the other hand, when the UE is in RRC_IDLE state, UE and 5G-RAN has to release the AS context, not known position of the UE is the 5G-RAN, location registration area-position of the UE is the 5G-CN it is known in the level. Location registration area corresponds to a LTE tracking area (Tracking Area (TA)). UE mobility is RRC_IDLE state is handled by the cell reselection controlled by the UE. In addition, RRC state of the AS layer, the connection management of the NAS layer (NG Connection Management (NG CM)) is associated with the state. A RRC_CONNECTED state the UE is considered to be NG-CM-CONNECTED state in the UE and 5G-CN. On the other hand, UE is RRC_IDLE state is believed to be NG-CM-IDLE state in the UE and 5G-CN.
[0011]
　RRC_INACTIVE state can be said to be an intermediate state between RRC_CONNETED state and RRC_IDLE state. Several features of RRC_INACTIVE state similar to their RRC_CONNETED state, but several other features of RRC_INACTIVE state similar to their RRC_IDLE state.
[0012]
　When UE is RRC_INACTIVE state, UE and 5G-RAN maintains at least a portion of the AS context. AS context held by the UE and 5G-RAN for the UE is RRC_INACTIVE conditions include, for example, radio bearer setup, and AS security context. Furthermore, 5G-RAN maintains while establishing the control plane and the user plane connection between the 5G-CN (ie, NG2 and NG3 interface of FIG. 1) for the RRC_INACTIVE state UE. A RRC_INACTIVE state UE is considered to be the NG-CM-CONNECTED state in the UE and 5G-CN. That, 5G-CN is, UE does not distinguish between whether or RRC_INACTIVE state is RRC_CONNECTED state. These features of RRC_INACTIVE state, similar to the characteristics of RRC_CONNETED state.
[0013]
　However, UE mobility is RRC_INACTIVE state is similar to that of UE is RRC_IDLE state. That, UE mobility is RRC_INACTIVE state is handled by the cell reselection controlled by the UE.
[0014]
　Figure 2 shows the state transition between the three RRC states that are currently proposed. The UE may transition to and from the RRC_CONNECTED state and RRC_INACTIVE state (step 201 and 202). Transition between the RRC_CONNECTED state and RRC_INACTIVE state, reusing the defined RRC connection pending (Suspend) and resume (Resume) procedure in 3GPP Release 13 for LTE is assumed. AS contexts that are stored in the 5G-RAN for the UE is RRC_INACTIVE state can be transferred between RAN nodes (between gNBs). Specifically, when the UE transitions from RRC_INACTIVE state in RRC_CONNECTED state acquisition, RRC message (eg, RRC Connection Resume request) from the UE GNb which has received the AS context of the UE from other GNb ( fetch / retrieve) may be.
[0015]
　Position of the UE is RRC_INACTIVE condition is known by 5G-RAN at the level of the newly defined by RAN notification area (RAN Notification Area (RNA)). RAN notification area, RAN-based Notification Area, also referred to as a RAN paging area, or RAN location update area. RAN notification area (RNA) includes one or more cells is determined by 5G-RAN, it is set to the UE by the 5G-RAN. UE of RRC_INACTIVE state does not need to be notified (report) that even when moving between cells by the cell reselection in the RAN notification area was performed cell reselection to the 5G-RAN. UE of RRC_INACTIVE state, when re-selecting a RAN notification area outside the cell, requesting the updating of the RAN notification area 5G-RAN.
[0016]
　Figure 3 shows an example of a UE mobility is RRC_INACTIVE state. Initially, UE 301 is a RRC_CONNECTED state (321) in cell 351 of GNB311, assigned an individual (dedicated) radio resources from GNB311, has established a dedicated radio bearer (dedicated radio bearers) 322. gNB311 determines the transition to RRC_INACTIVE state of UE 301, it sets the RAN notification area 340 to UE 301, transmits an RRC message (eg, RRC Suspend message) to the UE 301 (323). In response to an instruction from GNB311, UE 301 enters the RRC_CONNECTED state to RRC_INACTIVE state (324).
[0017]
　A RRC_INACTIVE state UE301 performs cell reselection procedure, re-select a cell 352 of gNB312 (325). Since the cells 352 included in the RAN notification area 340 set in the UE 301, UE 301 does not report the cell reselection (that updating of UE location information) to 5G-RAN (eg, cell 352 or GNB312). UE301 is moved further, re-select a cell 353 of gNB313 (326). Since the cell 353 is not included in the RAN notification area 340 set in the UE 301, UE 301 transmits RAN notifies area update request (327) to GNB313. The request (327) is, RRC message (eg, RRC Resume Request message) requesting the transition to RRC_CONNECTED from RRC_INACTIVE may be transmitted using. gNB313 obtains the AS context UE301 from GNB311, to re-establish the Packet Data Convergence Protocol (PDCP) and Radio Link Control (RLC) for radio bearers using the AS context obtained. Then, GNB313 transmits an RRC message (eg, RRC resume message) to transition the UE301 in RRC_CONNECTED state. In response to an instruction from GNB311, UE 301, in the cell 353, it enters from RRC_INACTIVE state in RRC_CONNECTED state (329). UE301 can be transmitted and received data using the dedicated radio bearer (dedicated radio bearers) 330.
[0018]
　The UE uplink (uplink (UL)) data transmission is RRC_INACTIVE state there are several proposals. For example, Non-Patent Documents 2 and 3, UE is RRC_INACTIVE state, proposes a procedure for transmitting without UL data to enter the RRC_CONNECTED state. Note that the term "UL data" as used herein, refers to the uplink user plane data, it does not include a control plane data such as Non-Access Stratum (NAS) message.
[0019]
　Specifically, Non-Patent Document 2, UE is RRC_INACTIVE state, using the grant-free radio resources, discloses a procedure for UL data transmission without requiring the UL grant from gNB (see Figure 4). For example, each cell broadcasts in grant-free radio resources (resources) system information of its own (System Information (SI)), UE selects resource (resource) derived from a unique RAN UE ID of its own.
[0020]
　On the other hand, Non-Patent Document 3, UE is the third message of the random access procedure (Message 3 (Msg3)), i.e. RRC message (eg, RRC Connection Resume Request) at the same time (simultaneously) discloses a procedure for transmitting UL data are (see Figure 5). If GNb in the procedure of Non-Patent Document 3 has received the UL data, GNb can either be to instruct the UE to remain in RRC_INACTIVE state can be instructed to enter a RRC_CONNECETD state. gNB sends a RRC response indicating "RRC suspend" when fastening the UE to RRC_INACTIVE state UE, and sends a RRC response indicating "RRC resume" when to transition the UE to RRC_CONNECTED state the UE. That is, the procedure shown in Non-Patent Document 3 can be said to be a procedure for transmitting UL data without UE enters completely (fully) RRC_CONNECTED state. Alternatively, the procedure shown in Non-Patent Document 3, can also be referred to as a procedure that the UE transmits UL data before the RRC_CONNECTED state.
CITATION
Non-patent literature
[0021]
非特許文献1 : 3GPP TR 23.799 V14.0.0 (2016-12) “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on Architecture for Next Generation System (Release 14)”, December 2016
非特許文献2 : 3GPP R2-168544, Huawei, HiSilicon, “UL data transmission in RRC_INACTIVE”, 3GPP TSG-RAN WG2 Meeting #96, Reno, USA 14th-18th November 2016
非特許文献3 : 3GPP R2-168713, Ericsson, “Baseline solution for small data transmission in RRC_INACTIVE”, 3GPP TSG-RAN WG2 Meeting #96, Reno, USA 14th-18th November 2016
Summary of the Invention
Problems that the Invention is to Solve
[0022]
　Present inventors have conducted studies with respect to UL data transmission RRC_INACTIVE state, we found several problems. For example, UL data transmission in RRC_INACTIVE conditions it may not be appropriate to be performed whenever the UE2 wishes. That is, one problem is where or when the UE is to determine either granted UL data transmission in RRC_INACTIVE state.
[0023]
　As an example, UE 301 is UL data transmission RRC_INACTIVE state (e.g., transmission procedure shown in Non-Patent Document 2 or 3) was carried out in the cell 352 of FIG. 3, successfully received UL data by gNB312 any problems that does not can be considered. For example, if the GNB312 have not succeeded in obtaining the AS context UE301 from gNB311, gNB312 might fail to receive the UL data. Alternatively, GNB312 is (if it fails for example decoding the UL data based on the AS security context (Decryption)) which obtained may fail to receive data using the AS context. In these cases, it may transmit power of the UE is wasted. Furthermore, if the UE301 need to reconnect to the cell 352 or other cells had occurred, the layer 2 (eg, PDCP) the UE301 is receiving a packet from an upper layer (eg, PDCP Service Data Unit (SDU)) a predetermined time has elapsed (i.e. delay is generated) before, may result in discarding the packet.
[0024]
　Therefore, one of the objective to be achieved is the embodiment disclosed herein is apparatus which makes it possible to perform the UE UL data transmission at RRC_INACTIVE state appropriate circumstances, methods, and provides a program It is to be. 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
[0025]
　In a first aspect, the radio terminal includes a transceiver, and at least one processor. Wherein the at least one processor is configured to control the transceiver in one or more cells associated with a radio access network (RAN). Wherein the at least one processor is a first RRC state, it is configured to control the state transitions of the wireless terminals between the second RRC state, and a third RRC state. Wherein the first RRC state, the wireless terminal and the RAN has access layer (Access stratum (AS)) is a state of maintaining a context, it is known by and said RAN position at the level of the cell of the radio terminal it is a state. The second RRC state, the wireless terminal and the RAN is in state to maintain at least a portion of the AS context, the and at the level of RAN notification area whose position is set by the RAN wireless terminal RAN is a state that is known by. The third RRC state, the a state in which the wireless terminal and the RAN has released the AS context, a and state the position of the wireless terminal is not known by the RAN. Wherein the at least one processor further if the a wireless terminal the second RRC state, and if the said current cell (current cell) is the first RRC state the wireless terminal is camping on a Unlike the first cell transition to 2 in the RRC state it is performed, and if the if the current cell satisfies a predetermined condition, transmits the uplink data before the wireless terminal is the first RRC state and it is configured to allow to transmit in the current cell transmission data via the first transmission procedure for.
[0026]
　In a second aspect, the base station arranged in a radio access network (RAN) includes a memory, and at least one processor coupled to said memory. Wherein the at least one processor is a first RRC state, it is configured to control the state transitions of the wireless terminals between the second RRC state, and a third RRC state. Wherein the at least one processor is further at least one specific for a first transmission procedure for transmitting uplink data before the first RRC state is permitted to said wireless terminal is a second RRC state setting information indicating a cell, and is configured to transmit to the radio terminal.
[0027]
　In a third aspect, a method in a wireless terminal, (a) a first RRC state, to control the state transitions of the wireless terminals between the second RRC state, and the third RRC state, and ( b) a If the wireless terminal is the second RRC state, and if a transition from said wireless terminal camped on to the currently cell the first RRC state to the second RRC state is performed Unlike the first cell, and if the if the current cell satisfies a predetermined condition, the transmission data via the first transmission step of transmitting the uplink data before the wireless terminal is the first RRC state It is allowed to transmit in the current cell, including.
[0028]
　In a fourth aspect, a method in a base station which is disposed in a radio access network (RAN) is, (a) a first RRC state, the second RRC state, and the wireless terminal between the third RRC state controlling the state transitions, and (b) at least a first transmission procedure for transmitting uplink data before the first RRC state is allowed to the radio terminal is the second RRC state 1 One of setting information indicating a particular cell includes, to be transmitted to the wireless terminal.
[0029]
　In a fifth aspect, the program includes the when loaded into a computer, instructions for performing the method according to the third or fourth aspects described above to a computer (software code).
Effect of the invention
[0030]
　According to the embodiments described above, device that allows to perform the UE UL data transmission at RRC_INACTIVE state appropriate circumstances, it can provide a method, and a program.
BRIEF DESCRIPTION OF THE DRAWINGS
[0031]
FIG. 1 is a diagram illustrating the basic architecture of the 5G System according to background art.
Is a diagram showing the state transition of three RRC states of 5G System according to [2] Background Art.
3 is a diagram showing an example of a UE mobility RRC_INACTIVE state according to the background art.
It is a diagram illustrating an example of a UL transmission procedure in RRC_INACTIVE state according to FIG. 4 background art.
It is a diagram illustrating an example of a UL transmission procedure in RRC_INACTIVE state according to FIG. 5 background art.
6 is a diagram showing an example of configuration of a wireless communication network in accordance with some embodiments.
7 is a flowchart showing an example of the operation of the UE according to the first embodiment.
8 is a flowchart showing an example of the operation of the UE according to the first embodiment.
9 is a flowchart showing an example of an operation of the UE according to the first embodiment.
FIG. 10 is a sequence diagram showing an example of gNB and UE operation according to the first embodiment.
11 is a block diagram showing a configuration example of a gNB according to some embodiments.
12 is a block diagram showing a configuration example of a UE according to some embodiments.
DESCRIPTION OF THE INVENTION
[0032]
　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.
[0033]
　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.
[0034]
　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.
[0035]
　A plurality of embodiments shown below is described the 5G System that uses RRC_INACTIVE state as the main subject. However, these embodiments may be applied to other wireless communication systems using RRC_INACTIVE state or similar RRC state therewith.
[0036]

　FIG. 6 shows a configuration example of a wireless communication network according to some embodiments including the present embodiment. In the example of FIG. 6, the wireless communications network includes a 5G UE2,5G-RAN3, and 5G-CN4.
[0037]
　5G-CN4 includes control plane network features that are not shown (Control Plane Network Functions (CP NFs)) and a user plane network functions (User Plane Network Functions (UP NFs)). 5G-CN4 may provide multiple network slices. Multiple networks slices, for example, are distinguished by the service or use case is provided to the UE on each network slices. Use case, for example, broadband communications (enhanced Mobile Broad Band: eMBB), reliable, low-latency communication including:: (mMTC massive Machine Type Communication) (Ultra Reliable and Low Latency Communication URLLC), and many connection M2M communication.
[0038]
　5G-RAN3 includes a plurality of gNB including gNB1A and GNB1B. Each gNB1 (eg, gNB1A, gNB1B) is operated at least one cell 11 (eg, cell 11A, the cell 11B). Each gNB1 is connected to the 5G-CN4, it may support one or more network slices. In other words, one or more network slice may be supported are or can be used in the cell 11 of each GNB1. In some implementations, 5G-RAN3, in order to provide end-to-end network slicing the UE2, the selected 5G-CN4 of the network slice (referred to as a Core Network (CN) slices) for UE2 allocating the associated RAN slices and wirelessly (radio) slice UE2. Each RAN slice, provides an infrastructure storage and processing resources in 5G-RAN3 including GNB1. Each radio slice, time resources, provides frequency resources, code resources, signal sequence resource or radio resources including space resources, or any combination thereof.
[0039]
　UE2, for the uplink and downlink communications, using one or more cells 11 is provided by one or more GNB1. UE2 is, RRC_CONNECTED state supports multiple RRC states including RRC_INACTIVE state, and RRC_IDLE state. 5G-RAN3 (gNB1) and the UE2, RRC_CONNECTED state, controls the UE2 state transitions between a plurality of RRC states including RRC_INACTIVE state, and the RRC_IDLE state.
[0040]
　For example, GNB1A, when transitioning to RRC_INACTIVE state UE2 from RRC_CONNECTED state, RRC message transmitted (eg, RRC Connection Release, RRC Connection Suspend, or RRC Connection Deactivate) the RAN notification area information in the UE2, to the UE2 setting the RAN notification area. RAN notification area includes one or more cells are provided by one or more GNB1, UE2 enters the RRC_INACTIVE state in response to reception of the RRC message from GNB1A. UE2 of RRC_INACTIVE state moves between cells by cell reselection UE2 led not required to report the cell reselection in the RAN notification area (that updating of UE location information) to 5G-RAN3. Meanwhile, UE2 is configured RAN notification area outside of the cell (eg, cell 11B) in response to the reselected, requesting an update of RAN notification area gNB1B the reselected cell 11B (or, to notify the gNB1B that has left the set RAN notification area). gNB1B determines a new RAN notification area for UE2, sets the determined RAN notifies area UE2. That is, as already described, the position of UE2 in RRC_INACTIVE condition is known to 5G-RAN3 in RAN notification area level.
[0041]
　As already explained, RAN notification area (RNA) includes one or more cells is determined by 5G-RAN3, it is set by the 5G-RAN3 to UE2. RAN notification area, RAN-based Notification Area, also referred to as a RAN paging area, or RAN location update area.
[0042]
　RAN notification area information, for example whether the information may at least comprise a showing contained what cell to the RAN notification area. Further, with respect to RAN notification area identifier (eg, area number) may be applied. Further, the identifier of the RAN notification area (eg, RNA ID) and, the relationship between the cell (s) to be embraced therein, may be to uniquely determined within a given area. In this case, RAN notification area information may include information of a cell that is included with the identifier RAN notification area (eg, cell identifier).
[0043]
　gNB1A may inform the RAN notification area information in its own cell 11A. In this case, RAN notification area information includes a plurality of RAN notification area, condition (eg, category, type) is given to each may be selected RAN notification area UE2 corresponds to itself. The conditions are, for example, UE2 (or desired) using slices category or slice type of network slices (eg, Slice / Service Type: SST), the category or type of terminal, UE2 reception quality or coverage level based thereon , transfer characteristics of UE2 (eg, UE speed, whether stationary terminal), or any combination thereof.
[0044]
　RAN notification area set to UE2 may be the same as the UE2 location registration area (ie, the area corresponding to the LTE tracking area (TA)). If an individual RAN notification area to each network slice (ie Slice specific RNA) is set, at least one location registration area (eg, TA) and may be the same among the plurality of RAN notification area. If RNA is the same as the TA, the information element indicating a cell list included in the RNA in the RAN notification area information sent from gNB1 to UE2 (eg, RanAreaCellList Information Element (IE)) are may be omitted (i.e. , Optional IE). Alternatively, RAN notification area information, instead of the information element indicating cell list information element (eg, TrackingAreaCode IE) indicating the TA identifier may comprise (i.e., Choice). In other words, GNB1 to indicate the RAN notification area, may select one of RanAreaCellList IE and TrackingAreaCode IE.
[0045]
　For transmission including a plurality of RAN notification area RAN notification area information, GNB1A includes other gNB (eg, gNB1B) from the RAN notification area information (eg, the RAN notifies area identifier, constituting the RAN notification area a combination) of the cell identifier may be received via the gNB between interfaces (Xn). The other gNB the cell gNB1A (eg, cell 11A) may be a gNB which manages a cell which belongs to a different other RAN notification area and belongs RAN notification area. Information about the RAN notification area for receiving similarly from other gNB may be information for different other RAN notification area the RAN notifies area cell gNB1A (eg, cell 11A) belongs.
[0046]
　If UE2 is using multiple network slices (or hopes), UE2 may select a RAN notification area based on the highest priority network slices are actually used based on the network slice may select a RAN notification area. Alternatively, UE2 may select a RAN notification area on the basis of the network slices included in the upper network slice category or type of the list contained in the RAN notification area information.
[0047]
　Individual information network slice RAN notification area (eg, an identifier, category or type) is not explicitly (default RAN notification area) may be included in the RAN notification area information described above. Other this case, for example, the default RAN notification area, except may be the RAN notification area is valid for UE2 irrespective of the network slice, explicitly notified network slices RAN notification area information it may be the RAN notification area is valid for the network slices. Furthermore, if the RAN notification area information includes a plurality of RAN notification area, UE2 unless cell after cell reselection included in at least one of a plurality of RAN notification area, it transmits an update request for location information to gNB1 it may not be.
[0048]
　Instead of indication by the aforementioned RRC message, GNB1 notifies the value of the predetermined timer that triggers a transition to RRC_INACTIVE state UE2, the transition to RRC_INACTIVE state based on the value and the corresponding timer of the timer UE2 it may be executed. For example, UE2 in RRC_CONNECTED state, the timer restart (i.e., the timer is reset again start) each for transmitting or receiving the user data may transition to and, RRC_INACTIVE state When the timer expires.
[0049]
　UE2 is further configured to perform UL data transmission in RRC_INACTIVE state. That, UE2 is, UE2 is at a RRC_INACTIVE state, supporting steps (first transmission procedure) for transmitting without UL data to enter the RRC_CONNECTED state. UL data transmission RRC_INACTIVE state may be performed by the procedure of transmitting the UL data while UE2 has remained RRC_INACTIVE state. Additionally or alternatively, UL data transmission RRC_INACTIVE state may be performed by the procedure of transmitting the UL data before UE2 is RRC_CONNECTED state. In other words, UL data transmission RRC_INACTIVE state may be performed by the procedure of transmitting the UL data without UE2 enters completely (fully) RRC_CONNECTED state. In other words Further, UL data transmission RRC_INACTIVE state may be performed during the procedure UE2 transitions from RRC_INACTIVE state in RRC_CONNECTED state.
[0050]
　In some implementations, UE2 MAY steps for performing UL data transmission without UE2 is RRC_INACTIVE state requires a separate UL grant from gNB using grant-free radio resources ( for example, the transmission procedure shown in non-Patent Document 2). Additionally or alternatively, UE2, the third message (Message 3 (Msg3)) of the random access procedure, i.e. RRC message (eg, RRC Connection Resume Request) may execute instructions for transmitting simultaneously with UL data (e.g., transmission procedure shown in non-Patent Document 3).
[0051]
　UE2 according to the present embodiment (controller in eg, UE2) is, UL data transmission RRC_INACTIVE state operates as follows to determine whether allowed to UE2. UE2 (eg, controller in UE2) that if UE2 is RRC_INACTIVE state and if UE2 is camped on to the currently cell (ie serving cell) is first transition from RRC_CONNECTED state to RRC_INACTIVE state is performed Unlike cells, and if if the current cell satisfies a predetermined condition, to allow the UE2 sends the current cell UL data by the first transmission procedure. It said first transmission procedure offers a UL data transmission in RRC_INACTIVE state. That is, the in the first transmission procedure, (before the completion of transition to other words RRC_CONNECTED state) UE2 transmits UL data without becoming RRC_CONNECTED state or the UE2 before the RRC_CONNECTED state transmits UL data to.
[0052]
　On the other hand, UE2 (controller in eg, UE2) is if the current cell (serving cell) does not satisfy the predetermined condition does not permit to send UL data in the current cell by the first transmission procedure, it may be allowed to send in the current cell UL data by the second transmission procedure. The second transmission procedure offers a UL data transmission in the RRC_CONNECTED state. That is, the in the second transmission procedure (after transition to i.e. RRC_CONNECTED state is completed) after the UE2 is changed from RRC_INACTIVE state in RRC_CONNECTED state to transmit the UL data.
[0053]
　Figure 7 is a flowchart showing an example of operation of UE2 (process 700). Process 700, UL data to be transmitted may be executed when in the UE2. For example, UE2 of Access Strutum (AS) layer is an upper layer when receiving the UL data from (eg, Non Access Strutum (NAS) layer), the process 700 may be performed. In step 701, the controller in the UE2 determines RRC state of the UE2. If UE2 is RRC_INACTIVE state, the controller determines the current cell (serving cell) (step 702). If the current cell is different from the first cell transition from RRC_CONNECTED state to RRC_INACTIVE state is performed, the controller, the current cell is determined whether a predetermined condition is satisfied (step 703). If If the current cell satisfies a predetermined condition, the controller permits the UL data transmission RRC_INACTIVE state UE2 (step 704).
[0054]
　In one example, the predetermined condition for the current cell (serving cell) includes a condition that the current cell is managed by the same gNB the first cell. Controller in UE2, in order to determine whether the current cell is managed by the same GNb the first cell, the identifier of GNb that manages the current cell or the current cell received in the current cell (eg, global GNb ID, truncated gNB ID, the or temporary gNB ID), may be compared with identifiers of GNb managing the first cell or first cell.
[0055]
　gNB1 who instructed from RRC_CONNECTED state transition to RRC_INACTIVE state UE2 holds the AS context of the UE2. Therefore, even if moving the UE2 to another cell operated by the gNB1, gNB1 is the AS context of the UE2 which maintains itself, to support UL data transmission RRC_INACTIVE state by the UE2 available.
[0056]
　In another example, the predetermined condition for the current cell, the current cell, UE2 has (have been or already set) designated by gNB of the first cell in the transition from RRC_CONNECTED state to RRC_INACTIVE state at least one including the condition to be within a specific cell. The at least one particular cell may be a subset of the at least one cell of the RAN notification area. Alternatively, the at least one particular cell can be the same and at least one cell of the RAN notification area. Alternatively, the at least one particular cell may be other one or more cells which are operated by the same gNB the first cell. That is, in one example, RAN notification area may be synonymous with configured area of ​​one or more cells are operated by a single GNb.
[0057]
　In yet another example, the predetermined condition for the current cell, the current cell, UE2 has (have been or already set) designated by gNB of the first cell in the transition from RRC_CONNECTED state to RRC_INACTIVE state RAN notification the area is set separately including a condition to be within a specific area. The specific area, for example, UE Context Service Area (UE Context available Area: UCA) and may be referred to. The UE Context available area, predetermined identifier (eg, UCA Identity) may be defined by. In this case, the identifier may be transmitted from gNB as system information in each cell. Alternatively, UE Context available area may be defined by one or more cells. UE2, the identifier or cell identifier of UE Context available area currently cells, may determine whether or not its corresponding set UE Context available area.
[0058]
　Predetermined condition relating to the cell current, bearer or flow (ie, PDU flow or QoS flow) may be different for each. For example, RAN notification area whereas a per UE (or serving cell units), the above-described UE Context available area may be set for each bearer or for each flow.
[0059]
　Figure 8 is a flow chart illustrating an example (the process 800) in the determination process of a predetermined condition relating to the current cell. In step 801, the controller in the UE2, determines whether the current cell is managed by the same gNB the first cell. In step 802, if the current cell if managed by the same gNB the first cell, is the controller, permits UL data transmission in RRC_INACTIVE state UE2.
[0060]
　Figure 9 is a flow chart showing another example of a determination process of a predetermined condition for the current cell (process 900). In step 901, the controller in the UE2, determines whether the current cell is included in at least one particular cell specified for UE2 by gNB of the first cell. In step 902, if the current cell is included in at least one specific cell, the controller permits the UL data transmission RRC_INACTIVE state UE2.
[0061]
　Processing performed by the controller in the above UE2 (eg, process 800 or process 900) is, UE2 the AS layer (eg, RRC, PDCP, RLC, or MAC sublayer) may be processing of. Further, the processing performed by the controller may be a processor of a plurality of sublayers in the AS layer.
[0062]
　In the following, an example of the operation of GNB1. As described above, in one example, GNB1 a first transmission step of transmitting before the or RRC_CONNECTED state without being RRC_CONNECTED state (i.e. before the transition to the RRC_CONNECTED state is completed) the UL data RRC_INACTIVE state setting information indicating at least one specific cell is allowed to UE2 it is, may be transmitted to UE2. gNB1 is the setting information individual signal (eg, dedicated RRC signaling) may be transmitted, in its cells 11 may transmit (broadcast) as system information. Figure 10 is a sequence diagram showing an example of the operation of GNB1 (processing 1000). In step 1001, GNB1 transmits setting information indicating at least one specific cell UE2. gNB1, in the cell 11 to be operated by the gNB1 when UE2 transitions from RRC_CONNECTED state to RRC_INACTIVE state may transmit the setting information to UE2.
[0063]
　As already described, the particular cell designated to UE2 by gNB1 (cell (s)) may be one or more cells operated by the GNb. In this case, setting information indicating a specific cell (cell (s)) may include a cell list that indicates one or more cells are operated by gNB1 sending the configuration information. Thus, UE2, on the basis of the configuration information for a specific cell (cell (s)), it can be determined whether the cell 11 is camping on the current is being operated by the first GNB1. In some implementations, the list of specific cell (cell (s)) may be provided from gNB1 as neighbor cell list to the UE2. In this case, the neighbor cell list sent from gNB1 the UE2 may include a second sub-list indicating the cell to be operated by the first sublist, and other gNBs showing only the cell operated by the gNB1 . If the neighbor cell list comprises a first sublist and a second sublist, UE2, even if the identifier of an explicit gNB1 did, the first sublist contains as a component only cells gNB1 It was recognized, and may recognize that the second sublist contains as a component for another cell gNB non GNB1. For example, UE2 recognizes (towards the value of the identifier of the sub-list is large to be or applied) level information element neighbor cell list as the first sublist, subordinate information element (or granted sublist is Write the value of the identifier is small) may recognize a second sublist.
[0064]
　Additionally or alternatively, the particular cell designated to UE2 by gNB1 (cell (s)) may be a subset of cells (cell (s)) constituting the RAN notification area for UE2. . In this case, setting information indicating a specific cell (cell (s)) are each cell included in the RAN notification area may indicate whether a particular cell.
[0065]
　Furthermore, as previously described, in one example, GNB1 is to inform the cell the first transmission procedure is allowed to UE2 is RRC_INACTIVE state UE2, separate from the RAN notification area "specific area" the may be set to UE2. The specific area, for example, UE Context Service Area (UE Context available Area: UCA) and may be referred to. gNB1 is setting information indicating one or more cells included in the UE Context available area may be transmitted to UE2. gNB1 is the setting information about the UE Context available area Separate signals (eg, dedicated RRC signaling) may be transmitted, in its cells 11 may be notified (broadcast) as system information.
[0066]
　GNB1 identifies GNB1 to provide a cell 11, and to UE2 is to be able to distinguish GNB1 other GNb, GNB1 identifier in each cell 11 itself (eg, gNB ID, Truncated gNB ID, or Temporary network identity) may be transmitted. gNB1 identifier may be transmitted in the system information (System Information (SI)). The system information may be included in the broadcast system information block broadcasted in each cell 11. Alternatively, the system information may be included in the on-demand system information block transmitted to the UE2 in response to a request message from UE2. Thus, UE2 identifies gNB1 to provide a cell 11 which itself is camping on, which can be distinguished from other GNb.
[0067]
　Alternatively, the cell identifier of the cell 11 (eg, Physical Cell ID, Physical Cell ID and Carrier frequency (eg, ARFCN), or Cell Global ID) is used to identify the gNB1 to operate the cell it may be. In other words, the identifier of gNB1 may be embedded in the cell identifier of the cell 11. Thus, UE2 is itself a gNB1 to provide a cell 11 that is camping on specified based on the cell identifier of the cell 11, which can be distinguished from other GNb.
[0068]
　Additionally or alternatively, have a Cloud Radio Access Network (C-RAN) configuration gNB1 will be described later, if the gNB1 manages one or more Transmission Reception Point of (TRP or TRxP), form cells 11 it may be used for a TRP identifier (eg, TRP ID) to identify the gNB1 to operate the TRP. In other words, the identifier of gNB1 may be embedded within TRP identifier TRP.
[0069]
　Here, GNB1 the identifier described is used an area consisting of one or more cells are operated to UE2 is known by GNB1. Thus, the identifier of the GNB1 may also be referred to as being "Area identifier" for identifying the area of ​​one or more cells are operated by GNB1. That, GNB1 transmits an area identifier in one or more cells to which it operated. Controller in the UE2, if the area identifier received in the current cell is the same as that of the first cell, may allow data transmission in RRC_INACTIVE state UE2.
[0070]
　As understood from the above description, UE2 according to the present embodiment, if the UL data to be transmitted remains RRC_INACTIVE state in the first cell transition is made from the RRC_CONNECTED state to RRC_INACTIVE condition occurs, the It allowed the UL data transmitted by the first transmission procedure. On the other hand, if UE2 is RRC_INACTIVE state and if UE2 is different from the first cell camped on to that current cell (serving cell) is performed the transition from the RRC_CONNECTED state to RRC_INACTIVE state and if the current cell has a predetermined if the condition is satisfied, it permits the UE2 sends the current cell UL data by the first transmission procedure. This makes it possible to limit the situations in which UE2 is allowed to UL data transmission in RRC_INACTIVE state. Thus, this embodiment, UE can be possible to perform UL data transmission at RRC_INACTIVE state appropriate circumstances.
[0071]

　The present embodiment provides a modification of the operation of UE2 described in the first embodiment. Configuration example of a wireless communication network of this embodiment is the same as FIG.
[0072]
　RAN UE2 according to the present embodiment (controller eg, the UE2) is that if the UE2 performs cell reselection RRC_INACTIVE state and if the current cell (i.e., cell reselection target cell) is set to the UE2 It does not belong in the notification area, and if the update procedure of the update procedure or RAN notification area of ​​UE position information is not performed, the first above after the update procedure of the registration procedure or RAN notification area of ​​UE position information or it is configured to allow the transmission of UL data in the current cell according to the second transmission procedure. UE2 sends a RAN notification area update request message to GNB1. The message, RRC message (eg, RRC Resume Request message) requesting the transition to RRC_CONNECTED from RRC_INACTIVE may be transmitted using. If GNB1 receives a RAN notification area update request message from UE2, GNB1 can either be to instruct the UE2 to remain in RRC_INACTIVE state can be instructed to enter a RRC_CONNECETD state. gNB1 sends a RRC response indicating "RRC suspend" when fastening the UE2 to RRC_INACTIVE state UE, and sends a RRC response indicating "RRC resume" when transitioning the UE2 to RRC_CONNECTED state UE2. Alternatively, UE2, after complete transition to RRC_CONNECTED, may transmit the RAN notification area update request message to GNB1. Thus, UE2, when reselected the RAN notification area outside of the cells that are set, first, performs the updating procedure of the RAN notification area. Accordingly, the present embodiment, due to the cell in which UE2 performs UL data transmission RRC_INACTIVE state is outside the RAN notification area, it is possible to avoid the situation where gNB1 is not successfully received the UL data.
[0073]
　Note, UE2 is the registration procedure or RAN notification area update procedure completion message of UE location information (eg, RRC Connection Resume Complete) may transmit UL data using. In other words, UE2 may transmit UL data within the procedure for updating registration procedure or in RAN notification area of ​​RAN-level UE location information.
[0074]
　Then, in the following, a configuration example of gNB1 and UE2 in accordance with embodiments described above. Figure 11 is a block diagram showing a configuration example of a gNB1 according to the embodiment described above. Referring to FIG. 11, GNB1 is, Radio Frequency transceiver 1101, a network interface 1103, a processor 1104, and memory 1105. RF transceiver 1101 performs an analog RF signal processing for communicating with NG UEs including UE2. RF transceiver 1101 may include a plurality of transceivers. RF transceiver 1101 is coupled to the antenna array 1102 and the processor 1104. RF transceiver 1101 receives the modulated symbol data from the processor 1104, generates a transmission RF signal and provides a transmit RF signal to the antenna array 1102. Also, RF transceiver 1101 to generate a baseband received signal based on the reception RF signal received by the antenna array 1102, and supplies it to the processor 1104. RF transceiver 1101 may include an analog beamformer circuitry for beam forming. Analog beamformer circuit includes, for example, a plurality of phase shifters and a plurality of power amplifiers.
[0075]
　Network interface 1103 is used to communicate with a network node (eg, the control node and forwarding node of 5G-CN4). Network interface 1103 may include, for example, a network interface card that complies with the IEEE 802.3 series (NIC).
[0076]
　The processor 1104 performs control plane processing and digital baseband signal processing for wireless communication (data plane processing). Processor 1104 may include multiple processors. For example, the processor 1104 is a modem processor that performs digital baseband signal processing (eg, Digital Signal Processor (DSP)) and protocol stack processor for performing control plane processing (eg, Central Processing Unit (CPU) or Micro Processing Unit ( MPU)) may include. Processor 1104 may include a digital beamformer module for beamforming. Digital beamformer module, Multiple Input Multiple Output (MIMO) may include an encoder and precoder.
[0077]
　Memory 1105 is constituted by a combination of volatile and nonvolatile memory. Volatile memory may be, for example, Static Random Access Memory (SRAM) or Dynamic RAM (DRAM) or a combination thereof. The non-volatile memory, a mask Read Only Memory (MROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, or hard disk drive, or any combination thereof. Memory 1105 may include a storage that is remotely located from the processor 1104. In this case, the processor 1104 may access the memory 1105 via the I / O interfaces that are not network interface 1103 or illustrated.
[0078]
　Memory 1105 may store one or more software modules (computer program) 1106 containing instructions and data for processing by gNB1 described in several embodiments described above. In some implementations, the processor 1104, the software module 1106 that reads out and executes from the memory 1105 may be configured to perform processing of gNB1 described in the above embodiments.
[0079]
　Figure 12 is a block diagram showing a configuration example of UE2. Radio Frequency (RF) transceiver 1201 performs an analog RF signal processing for communicating with GNB1. RF transceiver 1201 may include a plurality of transceivers. Analog RF signal processing performed by the RF transceiver 1201 includes a frequency up-conversion, the frequency down-conversion, and amplification. RF transceiver 1201 is coupled to the antenna array 1202, and a baseband processor 1203. RF transceiver 1201 receives the modulated symbol data (or OFDM symbol data) from the baseband processor 1203, generates a transmission RF signal and provides a transmit RF signal to the antenna array 1202. Also, RF transceiver 1201 to generate a baseband received signal based on the reception RF signal received by the antenna array 1202, and supplies it to the baseband processor 1203. RF transceiver 1201 may include an analog beamformer circuitry for beam forming. Analog beamformer circuit includes, for example, a plurality of phase shifters and a plurality of power amplifiers.
[0080]
　Baseband processor 1203 performs control plane processing and digital baseband signal processing for wireless communication (data plane processing). Digital baseband signal processing, (a) data compression / decompression, (b) segmentation / concatenation of data, generation / decomposition of (c) transmission format (transmission frame), (d) transmission channel coding / decoding , including generation of (e) modulation (symbol mapping) / demodulation, and OFDM symbol data by (f) Inverse Fast Fourier Transform (IFFT) (baseband OFDM signal). On the other hand, the control plane processing, layer 1 (eg, transmission power control), Layer 2 (eg, radio resource management, and hybrid automatic repeat request (HARQ) process), and layer 3 (eg, attach, mobility and call management including communication management signaling) related.
[0081]
　For example, a digital baseband signal processing by a baseband processor 1203, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, may include a signal processing of the MAC layer, and the PHY layer. Further, the control plane processing by baseband processor 1203, Non-Access Stratum (NAS) protocol, RRC protocol, and may include a process of MAC CE.
[0082]
　Baseband processor 1203 may perform MIMO encoding and precoding for beamforming.
[0083]
　Baseband processor 1203 may include a modem processor that performs digital baseband signal processing (eg, DSP) and a protocol stack processor for performing control plane processing (eg, CPU or MPU). In this case, the protocol stack processor for performing control plane processing may be shared with an application processor 1204 which will be described later.
[0084]
　The application processor 1204, CPU, MPU, also referred to as a microprocessor or processor cores. The application processor 1204 may include a plurality of processors (multiple processor cores). The application processor 1204, a memory 1206 or illustrated which do not result system read from the memory a software program (Operating System (OS)) and various application programs (e.g., call application, WEB browser, a mailer, a camera operation application, music playback by running the application), to implement the various functions of the UE2.
[0085]
　In some implementations, as indicated by the dashed line (1205) in FIG. 12, the baseband processor 1203 and an application processor 1204 may be integrated on a single chip. In other words, the baseband processor 1203 and an application processor 1204 may be implemented as a single System on Chip (SoC) device 1205. SoC devices, sometimes referred to as system Large Scale Integration (LSI) or chipset.
[0086]
　Memory 1206 is a volatile memory or nonvolatile memory, or a combination thereof. Memory 1206 may include a physically independent plurality of memory devices. Volatile memory is, for example, a SRAM or DRAM, or a combination thereof. The non-volatile memory, MROM, EEPROM, flash memory, or hard disk drive, or any combination thereof. For example, memory 1206, a baseband processor 1203, an application processor 1204, and may contain accessible external memory device from SoC1205. Memory 1206, within baseband processor 1203, within the application processor 1204, or may include an integrated chip memory device within SoC1205. Furthermore, memory 1206 may include a memory in the Universal Integrated Circuit Card (UICC).
[0087]
　Memory 1206 may store one or more software modules (computer program) 1207 containing instructions and data for processing by the UE2 described in several embodiments described above. Configuration In some implementations, the baseband processor 1203 or the application processor 1204, the software modules 1207 and executes from the memory 1206, to perform the processing of UE2 described with reference to the drawings in the above embodiments it may be.
[0088]
　As described with reference to FIGS. 11 and 12, each of the processors included in gNB1 and UE2 according to the embodiment described above, 1 or includes instructions for causing the algorithm described with reference to the drawings in the computer to run multiple programs. 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.
[0089]

　5G-RAN3 described in the above-described embodiment, Cloud Radio Access Network (C- RAN) may be implemented on the basis of the concept. C-RAN may also be referred to as the Centralized RAN. Accordingly, the processes and operations performed by gNB1 described in the above embodiments, the Digital Unit (DU) contained in the C-RAN architecture, or may be provided by a combination of DU and Radio Unit (RU). DU is called the Baseband Unit (BBU) or Central Unit (CU). The RU, Remote Radio Head (RRH), Remote Radio Equipment (RRE), Distributed Unit (DU), or Transmission and Reception Point (TRP or TRxP) also called. That is, the processes and operations performed by each gNB1 described in the above embodiments may be provided by any one or more wireless stations (or RAN node).

claims

A wireless terminal,
　a transceiver,
　and at least one processor configured to control the transceiver in one or more cells associated with a radio access network (RAN),
includes a,
　the at least one processor, first RRC state, the second RRC state, and the between the third RRC state is configured to control the state transition of the wireless terminal,
　the first RRC state, the wireless terminal and the RAN is access layer is a state of maintaining (access stratum (AS)) context, and the the state in which the position of the wireless terminal is known by the RAN at the level of the cell,
　the second RRC state, the wireless terminal and a state in which the RAN maintains at least a portion of the AS context, the in RAN and at the level of the RAN notification area whose position is set by the RAN wireless terminal A state known me,
　the third RRC state, the a state in which the wireless terminal and the RAN has released the AS context and location of the wireless terminal known by the RAN is no state,
　Wherein the at least one processor further, if the wireless terminal is a second RRC state and if the second RRC state from the radio terminal camped on to the currently cell the first RRC state Unlike the first cell transition to is performed, if and if the current cell satisfies a predetermined condition, a first of said wireless terminal transmits uplink data before the first RRC state and it is configured to allow to transmit in the current cell transmission data by the transmission procedure,
the wireless terminal.
[Requested item 2]
　The predetermined condition is that the current cell contains the condition of being managed by the same base station as the first cell,
the wireless terminal according to claim 1.
[Requested item 3]
　Wherein the at least one processor, said because the current cell to determine whether it has been managed by the same base station as the first cell, the base which manages the current cell or the current cell received in said current cell the identifier of the station, is configured to compare the identifier of the base station which manages the first cell or the first cell,
the wireless terminal according to claim 2.
[Requested item 4]
　The predetermined condition is that the current cell, the wireless terminal is at least one specific designated by the base station of the first cell in the transition from the first RRC state to the second RRC state including the condition to be included in the cell,
the radio terminal according to any one of claims 1 to 3.
[Requested item 5]
　Wherein said at least one particular cell, a subset of the at least one cell constituting the RAN notification area,
wireless terminal according to claim 4.
[Requested item 6]
　Wherein said at least one particular cell, is identical to the at least one cell constituting the RAN notification area,
wireless terminal according to claim 4.
[Requested item 7]
　Wherein the at least one processor, if the current cell does not satisfy the predetermined condition, wherein the first transmission procedure without allowed to transmit in the current cell, the wireless terminal the second RRC state and it is configured to allow to transmit in the current cell the transmission data by a second transmission step of transmitting uplink data after becoming the first RRC state from
any of claims 1 to 6, wireless terminal according to any one of claims.
[Requested item 8]
　Wherein the at least one processor is if the a wireless terminal the second RRC state, and if the not the current cell belongs to the RAN notification area, have not been and update procedure performed in the RAN notification area Nara, wherein the or said updating procedure after the update procedure is configured to allow transmission of the transmission data in the current cell according to the first or second transmission procedure,
according to claim 7 wireless terminal.
[Requested item 9]
　In the first transmission procedure, the wireless terminal, the first to transmission of the transmission data without transitions to the RRC state,
the wireless terminal according to any one of claims 1-8.
[Requested item 10]
　In the first transmission procedure, the wireless terminal, while from the second RRC state of the procedure for transition to the first RRC state, transmitting the transmission data,
any one of claims 1 to 9 1 wireless terminal according to claim.
[Requested item 11]
　In the first transmission procedure, the wireless terminal, the second to the transmitting the transmission data while remaining in the RRC state,
the wireless terminal according to any one of claims 1-9.
[Requested item 12]
　The RAN notification area is a good area without reporting the cell reselection even when moving between cells in the RAN by the cell reselection when the wireless terminal is in the second RRC state,
wherein wireless terminal according to any one of claim 1 to 11.
[Requested item 13]
　A base station that is provided for radio access network (RAN),
　a memory and,
　at least one processor
provided with,
　at least one processor, a first RRC state, the second RRC state, and the third is configured to control the state transitions of the wireless terminals between the RRC states,
　the first RRC state is an state that maintains the wireless terminal and the RAN has access layer (access stratum (aS)) context and wherein a state where the position of the wireless terminal is known by the RAN at the level of the cell,
　the second RRC state is a state where the wireless terminal and the RAN maintains at least a portion of the AS context There, and said a state in which the position of the wireless terminal is known by the RAN at the level of the RAN notification area set by said RAN,
　said third RRC state, the wireless terminal and the RAN is A state that releases the serial AS context, a and state the position of the wireless terminal is not known by the RAN,
　wherein the at least one processor is further up before the first RRC state at least one setting information indicating a particular cell first transmission procedure is allowed to the radio terminal is the second RRC state for transmitting link data, and is configured to transmit to said wireless terminal,
base station.
[Requested item 14]
　Wherein the at least one processor, when the wireless terminal in a first cell managed by the base station transitions from the first RRC state to the second RRC state, the setting information to the wireless terminal It is configured to transmit,
the base station according to claim 13.
[Requested item 15]
　Wherein said at least one particular cell, said at least one cell to be operated by the same the base station and the first cell,
　the configuration information, the cell list indicating at least one cell that is operated by the base station including,
a base station according to claim 14.
[Requested item 16]
　Wherein the at least one particular cell is a subset of at least one cell constituting the RAN notification area,
　wherein the setting information, each cell included in the RAN notification area is included in the at least one specific cell indicating whether or not,
the base station according to claim 14.
[Requested item 17]
　A method in a wireless terminal,
　a first RRC state, to control the state transitions of the wireless terminals between the second RRC state, and the third RRC state, and
　if the wireless terminal is the second of a RRC state, and if different from the wireless terminal first cell transition the current cell camped on the first RRC state to the second RRC state is performed, and if the if the current cell satisfies a predetermined condition, permitting said radio terminal to transmit the first of the current cell transmission data by the transmission step of transmitting the uplink data before the first RRC state ,
comprising a
　first RRC state, the a state in which the wireless terminal and the radio access network (RAN) to maintain access layer (access stratum (AS)) context, and level positions cell of said wireless terminal in before A condition known by serial RAN,
　the second RRC state is a state where the wireless terminal and the RAN maintains at least a portion of the AS context, and the position of the wireless terminal by the RAN a state in which the level of the set RAN notification area known by the RAN,
　the third RRC state is a state where the wireless terminal and the RAN has released the AS context, and the radio it is a state in which the position of the terminal is not known by the RAN,
the method.
[Requested item 18]
　A method in a base station that is provided for radio access network (RAN),
　a first RRC state, to control the state transitions of the wireless terminals between the second RRC state, and the third RRC state, and
　at least one setting information indicating a particular cell in which the first transmission procedure for transmitting uplink data before it is allowed to the radio terminal is the second RRC state in which the first RRC state, it, to be transmitted to the wireless terminal
includes a
　first RRC state, the a state in which the wireless terminal and the RAN to maintain access layer (access stratum (AS)) context, is and the position of the wireless terminal a state in which at the level of the cell is known by the RAN,
　the second RRC state is a state where the wireless terminal and the RAN maintains at least a portion of the AS context and location of the wireless terminal but the R A condition known by the RAN at the level of the RAN notification area set by AN,
　the third RRC state is a state in which the wireless terminal and the RAN has released the AS context, and the location of the wireless terminal is in a state not known by the RAN,
the method.
[Requested item 19]
　The non-transitory computer readable medium storing a program for causing a method in a wireless terminal to a computer,
　the method comprising
　a first RRC state, the second RRC state, and during the third RRC state said controlling state transition of the wireless terminal, and in
　if the a wireless terminal the second RRC state, and if the the wireless terminal is currently cell camped on from the first RRC state Unlike the first cell transition to a second RRC state it is performed, if and if the current cell satisfies a predetermined condition, the uplink data before the wireless terminal is the first RRC state It is allowed to transmit in the current cell transmission data via the first transmission step of transmitting,
with a
　first RRC state, the wireless terminal and the radio access network (RAN) access layer A state that maintains the Access stratum (AS)) context, and the the state in which the position of the wireless terminal is known by the RAN at the level of the cell,
　the second RRC state, the wireless terminal and the RAN There is a state of maintaining at least a portion of the AS context, and the the state in which the position of the wireless terminal is known by the RAN at the level of the RAN notification area set by said RAN,
　said third RRC state, the a state in which the wireless terminal and the RAN has released the aS context, and the location of the wireless terminal is in a state not known by the RAN,
non-transitory computer readable media.
[Requested item 20]
　The non-transitory computer readable medium storing a program for causing a process in a base station which is disposed in a radio access network (RAN) to a computer,
　the method comprising
　a first RRC state, the second RRC state, and a third controlling state transition of the wireless terminal between the RRC states, and
　the first transmission procedure is the second RRC transmitting uplink data before the first RRC state at least setting information indicating one particular cell is allowed to the radio terminal is a state, the sending to the wireless terminal,
comprising a
　first RRC state, the wireless terminal and the RAN access layer a state of maintaining (Access stratum (AS)) context, and the the state in which the position of the wireless terminal is known by the RAN at the level of the cell,
　the second RRC state, the wireless terminal and The RAN is a state of maintaining at least a portion of the AS context, and the the state in which the position of the wireless terminal is known by the RAN at the level of the RAN notification area set by the RAN,
　the third the RRC states, the a state of the wireless terminal and the RAN has released the aS context, and the location of the wireless terminal is in a state not known by the RAN,
non-transitory computer readable media.