WO2022195782A1 - 無線基地局 - Google Patents
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- WO2022195782A1 WO2022195782A1 PCT/JP2021/010919 JP2021010919W WO2022195782A1 WO 2022195782 A1 WO2022195782 A1 WO 2022195782A1 JP 2021010919 W JP2021010919 W JP 2021010919W WO 2022195782 A1 WO2022195782 A1 WO 2022195782A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Definitions
- the following disclosure is made in view of such circumstances, and aims to provide a radio base station that can perform appropriate settings according to setting indications in the radio resource control layer.
- RRC processing unit 120 receives a setting indication of the radio resource control layer, and when the setting indication is included in a specific inter-node message, in the radio resource control layer of the secondary cell group
- a radio base station eg, eNB100A
- control unit 140 assumed to be a setting display.
- RRC processing unit 120 receives a setting indication of the radio resource control layer, and when the setting indication is included in a specific inter-node message, a secondary cell group and radio bearer radio resources
- a radio base station eg, eNB100A
- control unit 140 control unit 140
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
- FIG. 2 is a functional block configuration diagram of the eNB100A.
- FIG. 3 is a functional block configuration diagram of UE200.
- FIG. 4 is a diagram showing a sequence example of MN-initiated inter-SN SCG change.
- FIG. 5 is a diagram showing a sequence example of SN Modification procedure-SN initiated with MN involved.
- FIG. 6 is a diagram showing an example of specific actions of the MN according to Operation Example 2.
- FIG. 7 is a diagram showing a regulation example of SgNB Addition Request Acknowledge.
- FIG. 8 is a diagram showing a stipulated example of the SgNB Modification Request Acknowledge.
- FIG. 9 is a diagram showing a stipulated example of RRC config indication.
- FIG. 10 is a diagram showing an example of the hardware configuration of eNB100A, gNB100B and UE200.
- the wireless communication system 10 includes an Evolved Universal Terrestrial Radio Access Network 20 (hereinafter E-UTRAN 20) and a Next Generation-Radio Access Network 30 (hereinafter NG RAN 30).
- E-UTRAN 20 Evolved Universal Terrestrial Radio Access Network 20
- NG RAN 30 Next Generation-Radio Access Network 30
- the wireless communication system 10 also includes a terminal 200 (hereafter UE 200, User Equipment).
- eNB100A, gNB100B and UE200 perform radio communication via radio bearers, specifically Signaling Radio Bearer (SRB) or DRB Data Radio Bearer (DRB).
- SRB Signaling Radio Bearer
- DRB DRB Data Radio Bearer
- the radio communication system 10 may support conditional PSCell addition/change of Primary SCell (PSCell).
- PSCell is a kind of secondary cell.
- PSCell means Primary SCell (secondary cell), and may be interpreted as corresponding to any SCell among a plurality of SCells.
- the radio communication unit 110 transmits downlink signals (DL signals) according to LTE.
- Radio communication section 110 also receives an uplink signal (UL signal) according to LTE.
- the eNB 100A supports LTE, but in this case, the name of the RRC message may be RRC Connection Reconfiguration or RRC Connection Reconfiguration Complete.
- the RRC processing unit 120 may process inter-node messages with the gNB 100B.
- the RRC processing unit 120 in the procedure of MN-initiated SN change (3GPP TS37.340 Section 10.5.1), transmits SgNB Modification Request to gNB100B (for T-SN), and is a response to the SgNB Modification Request SgNB Addition Request Acknowledge can be received from gNB100B.
- the RRC processing unit 120 can receive SgNB Modification Required from gNB100B and send SgNB Modification Confirm to gNB100B in the procedure of SN Modification procedure - SN initiated with MN involvement (3GPP TS37.340 Section 10.3.1).
- the RRC processing unit 120 can receive RRC setting indications.
- the RRC processing unit 120 may constitute a receiving unit.
- the RRC processing unit 120 can receive an RRC config indication.
- the RRC config indication may be included as an information element (IE) in the inter-node message described above.
- RRC config indication may be interpreted as an indication showing the RRC settings.
- the RRC config indication may indicate the type of the full config. or delta config.
- the DC processing unit 130 executes processing related to dual connectivity, specifically Multi-RAT Dual Connectivity (MR-DC).
- MR-DC Multi-RAT Dual Connectivity
- the eNB 100A supports LTE and the gNB 100B supports NR, so DC processing section 130 may perform processing related to E-UTRA-NR Dual Connectivity (EN-DC).
- EN-DC E-UTRA-NR Dual Connectivity
- type of DC is not limited as described above, and may correspond to, for example, NR-E-UTRA Dual Connectivity (NE-DC) or NR-NR Dual Connectivity (NR-DC).
- the DC processing unit 130 can transmit and receive messages defined in 3GPP TS37.340, etc., and execute processing related to DC setup and release between the eNB100A, gNB100B, and UE200.
- the control unit 140 controls each functional block that configures the eNB 100A.
- the control unit 140 executes control regarding addition or change of secondary nodes.
- control unit 140 may assume that it is an SCG RRC configuration indication.
- a specific inter-node message may mean SgNB Addition Request Acknowledge, SgNB Modification Required or SgNB Modification Request Acknowledge.
- Configuration indication in RRC of SCG may mean RRC configuration of SCG config.
- the control unit 140 configures the SCG and radio bearer in the RRC It may be assumed that it is an indication.
- Configuration indication in RRC for SCG and radio bearer may mean RRC configuration of both SCG config and radio bearer config.
- the control unit 140 may release radio bearers terminated at the SN and provide security information to the SN based on the type of inter-node message containing the RRC config indication.
- control unit 140 when receiving SgNB Modification Request Acknowledge or SgNB Modification Required, control unit 140 releases the DRB of the SN termination and updates security information (specifically, security key (S-KgNB)). may be provided to SN.
- security information specifically, security key (S-KgNB)
- No generation of release list for radio bearers may mean “No generation of drb-to-Release List”.
- PDCP recovery of radio bearers may mean PDCP recovery of MN terminated DRBs.
- the radio communication unit 210 transmits an uplink signal (UL signal) according to LTE or NR. Also, radio communication section 210 receives a downlink signal (DL signal) according to LTE or NR. That is, UE200 can access eNB100A (E-UTRAN20) and gNB100B (NG RAN30), and can support dual connectivity (specifically, EN-DC).
- UL signal uplink signal
- DL signal downlink signal
- the DC processing unit 230 executes processing related to dual connectivity, specifically MR-DC. As described above, in this embodiment, the DC processing unit 230 may perform processing related to EN-DC, but may also support NE-DC and/or NR-DC.
- DC processing unit 230 accesses each of eNB100A and gNB100B, and multiple layers including RRC (medium access control layer (MAC), radio link control layer (RLC), and packet data convergence protocol layer (PDCP), etc.) can be performed.
- RRC medium access control layer
- RLC radio link control layer
- PDCP packet data convergence protocol layer
- MN (e.g., eNB100A) instructs UE200 to release and add RRC configuration related to SCG based on the received full config. on).
- the MN then releases the radio bearers, specifically the SN terminated DRBs, ie generates the DRB-ToReleaseList.
- FIG. 5 shows a sequence example of SN Modification procedure - SN initiated with MN involved. As shown in Figure 5, it is additionally specified that if the target DU (SN) triggers full config., the RRC config indication contained in SgNB Modification Required or SgNB Modification Request Acknowledge may be set to full config. It is also specified that if the target DU (SN) triggers full config., the RRC config indication contained in SgNB Modification Required or SgNB Modification Request Acknowledge may be set to full config. It is
- the (en-) gNB notifies the MeNB (MN) by including the RRC config indication IE in the SgNB Modification Request Acknowledge, and (en-) ) gNB is specified to notify the MeNB (MN) by including the RRC config indication IE in the SgNB Modification Required.
- RRC config indication (full config.) is interpreted as the meaning of option 2 described above.
- the MN may follow either of the following operation examples 2-1 or 2-2 regarding release/addition (Endc-ReleaseAdd) related to EN-DC.
- the MN releases the DRB at the SN termination, regardless of the content of the PDCP change indication, and updates the security information (specifically, the security key (S-KgNB)). may be provided to SN.
- the security information specifically, the security key (S-KgNB)
- RRC config indication As an interpretation of the meaning of RRC config indication, when following operation example 1-3 (meaning of option 1 or option 2 depending on the type of inter-node message), MN uses RRC config If SgNB Modification Request Acknowledge or SgNB Modification Required with indication (full config.) is received from SN, it may act according to Interpretation 1 shown in FIG.
- the MN does not generate a radio bearer release list (No generation of drb-to-Release List) and PDCP data recovery (data recovery) according to the contents of the PDCP change indication. Or you may perform a security key (S-KgNB) update.
- S-KgNB security key
- FIG. 7 shows an example of SgNB Addition Request Acknowledge.
- FIG. 7 shows a definition example of SgNB Addition Request Acknowledge defined in 3GPP TS36.423 Section 9.1.4.2.
- the RRC config indication may specify the RRC configuration of both SCG config and radio bearer config (option 2 above).
- FIG. 9 shows an example of RRC config indication.
- FIG. 9 shows a definition example of RRC config indication defined in 3GPP TS36.423 chapter 9.1.4.132.
- the RRC config indication means both SCG config and SCG radio bearer config (option 2).
- the following functions and effects are obtained.
- the meaning of the RRC config indication can be correctly recognized according to the type of inter-node message containing the RRC config indication.
- Proper configuration of RRC for SCG (SN) may be achieved.
- this can prevent failure (SgNB modification failure) at the time of modification of SN (gNB).
- the EN-DC in which the MN is the eNB and the SN is the gNB was described as an example, but other DCs may be used as described above.
- NR-DC in which MN is gNB and SN is gNB, or NE-DC in which MN is gNB and SN is eNB may be used.
- configure, activate, update, indicate, enable, specify, and select may be read interchangeably. good.
- link, associate, correspond, and map may be read interchangeably to allocate, assign, monitor. , map, may also be read interchangeably.
- each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
- a functional block (component) that performs transmission is called a transmitting unit or transmitter.
- the implementation method is not particularly limited.
- FIG. 10 is a diagram showing an example of the hardware configuration of the device.
- the device may be configured as a computing device including a processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, and the like.
- the term "apparatus” can be read as a circuit, device, unit, or the like.
- the hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.
- Each functional block of the device (see Fig. 2.3) is realized by any hardware element of the computer device or a combination of the hardware elements.
- each function of the device is implemented by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling the It is realized by controlling at least one of data reading and writing in 1002 and storage 1003 .
- a processor 1001 operates an operating system and controls the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, registers, and the like.
- CPU central processing unit
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially.
- Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
- the storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the recording medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 1003 .
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. The output information may be deleted. The entered information may be transmitted to other devices.
- the determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the Software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
- wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
- wireless technology infrared, microwave, etc.
- the channel and/or symbols may be signaling.
- a signal may also be a message.
- a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
- system and “network” used in this disclosure are used interchangeably.
- a base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.
- a base station subsystem e.g., a small indoor base station (Remote Radio)
- Head: RRH can also provide communication services.
- cell refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.
- a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
- the mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same).
- communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the mobile station may have the functions that the base station has.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.
- SCS subcarrier spacing
- TTI transmission time interval
- number of symbols per TTI radio frame structure
- transmission and reception specific filtering operations performed by the receiver in the frequency domain specific windowing operations performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) that is transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum scheduling time unit.
- the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.
- long TTI for example, normal TTI, subframe, etc.
- short TTI for example, shortened TTI, etc.
- a TTI having a TTI length greater than or equal to this value may be read as a replacement.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of neurology, and may be 12, for example.
- the number of subcarriers included in an RB may be determined based on neumerology.
- One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.
- PRB Physical resource blocks
- SCG sub-carrier groups
- REG resource element groups
- PRB pairs RB pairs, etc.
- a resource block may be composed of one or more resource elements (Resource Element: RE).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a Bandwidth Part) represents a subset of contiguous common resource blocks (RBs) for a neumerology in a carrier. good.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- One or more BWPs may be configured in one carrier for a UE.
- connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
- two elements are defined using at least one of one or more wires, cables and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions, and the like.
- the reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.
- RS Reference Signal
- Radio communication system 20 E-UTRAN 30NG RAN 100A eNB 100B gNB 110 Radio communication unit 120 RRC processing unit 130 DC processing unit 140 Control unit 200 UE 210 wireless communication unit 220 RRC processing unit 230 DC processing unit 240 control unit 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device 1007 bus
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Abstract
Description
図1は、本実施形態に係る無線通信システム10の全体概略構成図である。無線通信システム10は、Long Term Evolution(LTE)及び5G New Radio(NR)に従った無線通信システムである。なお、LTEは4Gと呼ばれてもよいし、NRは、5Gと呼ばれてもよい。また、無線通信システム10は、Beyond 5G、5G Evolution或いは6Gと呼ばれる方式に従った無線通信システムでもよい。
次に、無線通信システム10の機能ブロック構成について説明する。具体的には、eNB100A及びUE200の機能ブロック構成について説明する。
図2は、eNB100Aの機能ブロック構成図である。図2に示すように、eNB100Aは、無線通信部110、RRC処理部120、DC処理部130及び制御部140を備える。なお、gNB100Bも、NRをサポートする点が異なるが、eNB100Aと同様の機能を有してよい。
図3は、UE200の機能ブロック構成図である。図3に示すように、UE200は、無線通信部210、RRC処理部220、DC処理部230及び制御部240を備える。
次に、無線通信システム10の動作について説明する。具体的には、RRCの設定表示(RRC config indication)に関する無線通信システム10の動作について説明する。
3GPP Release-15において規定されている(NG)EN-DC inter SN SCG changeでは、RRC config indicationとしてfull config.を指定できる。
しかしながら、上述した規定に従った動作には、次のような問題があると考えられる。
・(オプション2):RRC configuration of both SCG config and radio bearer config
・(課題2):SgNB Addition Request Acknowledgeに含まれるRRC config indicationは、オプション2の意味を有するが、SgNB Modification RequiredまたはSgNB Modification Request Acknowledgeに含まれるRRC config indicationは、オプション1の意味を有し得る。このため、同一のRRC config indicationであるにも関わらず、2通りの解釈が存在し、適切な動作を阻害する可能性がある。
・SgNB Addition Request Acknowledge
・SgNB Modification Request Acknowledge
・SgNB Modification Required
・(動作例1-1):RRC config indication(full config.)は、上述したオプション1の意味と解釈する。
上述したIntra-CU inter DU SCG change/Intra-SN PSCell changeでは、SNのRRC設定(NR SCG config + SCG radio bearer config)のfull config.設定は、X2-AP(Application)プロトコルにおいて規定されるRRC config indication及びPDCP change indicationの組合せによってMNに通知できる。
上述した動作例1(具体的には、動作例1-3)を規定するため、3GPPの仕様では、例えば、次のように規定されてよい。
上述した実施形態によれば、以下の作用効果が得られる。具体的には、無線通信システム10(eNB100A(MN))によれば、RRC config indicationが含まれるノード間メッセージの種別に応じて、RRC config indication(full config.)の意味を正しく認識できるため、SCG(SN)に関するRRCの適切な設定を実現し得る。また、これにより、SN(gNB)のmodification時における失敗(SgNB modification failure)を未然に防止し得る。
以上、実施形態について説明したが、当該実施形態の記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。
無線フレームは時間領域において1つまたは複数のフレームによって構成されてもよい。時間領域において1つまたは複数の各フレームはサブフレームと呼ばれてもよい。サブフレームはさらに時間領域において1つまたは複数のスロットによって構成されてもよい。サブフレームは、ニューメロロジー(numerology)に依存しない固定の時間長(例えば、1ms)であってもよい。
20 E-UTRAN
30 NG RAN
100A eNB
100B gNB
110 無線通信部
120 RRC処理部
130 DC処理部
140 制御部
200 UE
210 無線通信部
220 RRC処理部
230 DC処理部
240 制御部
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
1007 バス
Claims (6)
- 無線リソース制御レイヤの設定表示を受信する受信部と、
前記設定表示が特定のノード間メッセージに含まれる場合、セカンダリーセルグループの無線リソース制御レイヤにおける設定表示であると想定する制御部と
を備える無線基地局。 - 無線リソース制御レイヤの設定表示を受信する受信部と、
前記設定表示が特定のノード間メッセージに含まれる場合、セカンダリーセルグループ及び無線ベアラの無線リソース制御レイヤにおける設定表示であると想定する制御部と
を備える無線基地局。 - 無線リソース制御レイヤの設定表示を受信する受信部と、
前記設定表示が第1のノード間メッセージに含まれる場合、セカンダリーセルグループ及び無線ベアラの無線リソース制御レイヤにおける設定表示であると想定し、前記設定表示が第2のノード間メッセージに含まれる場合、セカンダリーセルグループの無線リソース制御レイヤにおける設定表示であると想定する制御部と
を備える無線基地局。 - 前記ノード間メッセージは、セカンダリーノードの追加または変更の要求に関連するメッセージである請求項1乃至3の何れか一項に記載の無線基地局。
- 前記制御部は、前記設定表示が含まれる前記ノード間メッセージの種類に基づいて、セカンダリーノードに終端されている無線ベアラの解放、及びセキュリティ情報の前記セカンダリーノードへの提供を実行する請求項2に記載の無線基地局。
- 前記制御部は、前記設定表示が含まれる前記ノード間メッセージの種類に基づいて、無線ベアラの解放リストの不生成、または前記無線基地局に終端される無線ベアラのパケット・データ・コンバージェンス・プロトコル・レイヤの復旧を実行する請求項3に記載の無線基地局。
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Non-Patent Citations (4)
Title |
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3GPP TS36.423 |
NEC, NTT DOCOMO, INC.: "RRC config indication behaviour", 3GPP DRAFT; R3-191292-RRC-CONFIG-IND-DISC, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. Xian, China; 20190408 - 20190412, 6 April 2019 (2019-04-06), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051702570 * |
NEC, NTT DOCOMO, INC.: "RRC config indication behaviour", 3GPP DRAFT; R3-192071-WAS1293-RRC-CONFIG-IND-CR-36423, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. Xian, China; 20190408 - 20190412, 12 April 2019 (2019-04-12), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051703311 * |
ZTE CORPORATION: "Correction on RRC configuration indication", 3GPP DRAFT; R3-193536 CORRECTION ON RRC CONFIGURATION INDICATION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. Ljubljana, Slovenia; 20190826 - 20190830, 16 August 2019 (2019-08-16), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051769746 * |
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