WO2016133185A1 - ユーザ端末、無線基地局及び無線通信方法 - Google Patents
ユーザ端末、無線基地局及び無線通信方法 Download PDFInfo
- Publication number
- WO2016133185A1 WO2016133185A1 PCT/JP2016/054788 JP2016054788W WO2016133185A1 WO 2016133185 A1 WO2016133185 A1 WO 2016133185A1 JP 2016054788 W JP2016054788 W JP 2016054788W WO 2016133185 A1 WO2016133185 A1 WO 2016133185A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- user terminal
- transmission
- base station
- control unit
- ccs
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 129
- 230000002776 aggregation Effects 0.000 claims abstract description 16
- 238000004220 aggregation Methods 0.000 claims abstract description 16
- 239000000969 carrier Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 description 66
- 210000004027 cell Anatomy 0.000 description 27
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 18
- 238000013507 mapping Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 230000008054 signal transmission Effects 0.000 description 8
- 230000004044 response Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000012384 transportation and delivery Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 1
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 1
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 description 1
- 210000000678 band cell Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
Definitions
- the present invention relates to a user terminal, a radio base station, and a radio communication method in a next-generation mobile communication system.
- LTE Long Term Evolution
- Non-Patent Document 1 a LTE successor system (also referred to as LTE-A) called LTE Advanced has been studied for the purpose of further broadbanding and speeding up from LTE, and LTE Rel. It is specified as 10-12.
- LTE Rel. 12 includes at least one component carrier (CC: Component Carrier) having the system band of the LTE system as a unit. In this way, collecting a plurality of CCs to increase the bandwidth is called carrier aggregation (CA).
- LTE Rel. 12 supports dual connectivity (DC) in which communication is performed using CCs respectively controlled by radio base stations (schedulers) with different user terminals.
- DC dual connectivity
- the number of CCs that can be set per user terminal (UE) is limited to a maximum of five.
- LTE Rel. Is a further successor system of LTE.
- LTE-U LTE Unlicensed
- LAA Licensed-Assisted Access
- a licensed band is a band that a specific operator is allowed to use exclusively
- an unlicensed band is a band in which a radio station can be installed without being limited to a specific operator. It is.
- LTE-U LTE / LTE-A system
- the LTE-U base station / user terminal performs listening before signal transmission and restricts transmission based on the listening result.
- an unlicensed band for example, use of a 2.4 GHz band, a 5 GHz band capable of using Wi-Fi (registered trademark) or Bluetooth (registered trademark), a 60 GHz band capable of using a millimeter wave radar, or the like is being studied. Yes. Application of such an unlicensed band in a small cell is also under consideration.
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- PCell primary cell
- SCell secondary cells
- CC cells set in a user terminal.
- UE user terminal
- an unlicensed CC is set as a SCC (for example, an extended CC) in a user terminal, depending on the listening result (LBT result), the user terminal may not be able to send and receive regular signals to and from the unlicensed CC. For this reason, if the user terminal performs a transmission operation such as UL transmission on the unlicensed CC in the same manner as the SCC (SCell) of the existing system, communication may not be performed appropriately.
- a transmission operation such as UL transmission on the unlicensed CC in the same manner as the SCC (SCell) of the existing system
- the present invention has been made in view of such a point, and communication is performed even when the number of CCs that can be set in a user terminal is extended from an existing system and / or when CA is performed using an unlicensed CC. It is an object to provide a user terminal, a radio base station, and a radio communication method that can be performed appropriately.
- One aspect of a user terminal is a user terminal that communicates with a radio base station using carrier aggregation using a plurality of component carriers (CC), and transmits UL signals via each CC.
- a first CC corresponding to at least a primary CC of the existing system, and the first CC and the existing system as a plurality of CCs.
- the control unit performs a random access operation different from the first and second CCs with respect to the third CC. It is characterized by applying.
- communication can be appropriately performed even when the number of CCs that can be set in the user terminal is expanded from the existing system and / or when CA is performed using an unlicensed CC.
- FIG. 1 is an explanatory diagram of carrier aggregation (CA).
- CA carrier aggregation
- LTE Rel in the CA of the existing system (up to LTE Rel. 12), LTE Rel.
- CC component carriers
- the carrier aggregation up to 12 the number of CCs that can be set per user terminal (UE: User Equipment) is limited to a maximum of five.
- UE User Equipment
- LTE Long Term Evolution
- LTE-A Since existing LTE / LTE-A is premised on operation in a license band, a different frequency band is allocated to each operator. However, unlike the license band, the non-licensed band is not limited to use only by a specific operator. When LTE is operated in a non-licensed band, it is also assumed that different operators and non-operators operate without synchronization, cooperation, and / or cooperation. In this case, in the non-licensed band, a plurality of operators and systems share and use the same frequency, which may cause mutual interference.
- Wi-Fi systems operated in non-licensed bands employ Carrier Sense Multiple Access / Collision Avoidance (CSMA / CA) based on the LBT (Listen Before Talk) mechanism. .
- CSMA Carrier Sense Multiple Access / Collision Avoidance
- TP Transmission Point
- AP Access Point
- STA Wi-Fi terminal
- CCA Clear Channel Assessment
- a method is used in which transmission is performed only when there is no signal exceeding a predetermined level. When a signal exceeding a predetermined level exists, a waiting time (back-off time) given at random is provided, and then listening is performed again (see FIG. 2).
- listening means whether a signal exceeding a predetermined level (for example, predetermined power) is transmitted from another transmission point before the radio base station and / or the user terminal transmits the signal. This refers to the operation of detecting / measuring.
- the listening performed by the radio base station and / or the user terminal may be referred to as LBT (Listen Before Talk), CCA (Clear Channel Assessment), or the like.
- a radio base station and / or a user terminal performs listening (LBT) before transmitting a signal in an unlicensed band cell, and checks whether another system (for example, Wi-Fi) or another operator is communicating. .
- LBT listening
- the radio base station and / or the user terminal considers that the channel is in an idle state (LBT_idle) Send.
- the received signal strength from the transmission point of another system or another LAA is larger than a predetermined value as a result of listening, the channel is regarded as being in a busy state (LBT_busy) and signal transmission is restricted.
- limiting of signal transmission it can change to another carrier by DFS (Dynamic Frequency Selection), can perform transmission power control (TPC), or can wait (stop) signal transmission.
- DFS Dynamic Frequency Selection
- LBT in communication of an LTE / LTE-A system (for example, LAA) operated in a non-licensed band, it becomes possible to reduce interference with other systems.
- LTE / LTE-A system for example, LAA
- the expansion of the number of CCs shown in FIG. 1 is effective for widening the band by carrier aggregation (LAA: License-Assisted Access) between the license band and the unlicensed band.
- LAA License-Assisted Access
- an unlicensed band CC (UCC) is a secondary cell (SCC) of an existing system.
- the unlicensed band CC (UCC) may be set as an extended CC.
- an unlicensed carrier coexists with other systems, there is a high possibility that the quality fluctuation is large and the reliability of communication is lowered compared to a license carrier. For this reason, it is conceivable to use a license carrier to support the use of an unlicensed carrier (for example, notification of an LBT result using a license carrier). In this case, it is considered that the user terminal operations for the unlicensed band CC and the existing SCC are different.
- the present inventors have conceived to apply different operations / controls between the extended CC and unlicensed CC and the existing PCC and SCC to the user terminal.
- the PCC and SCC are newly added so that the user terminal can distinguish between the PCC and SCC of the existing system (Rel. 10-12) and the CC (for example, UCC) to which different operation / control is applied.
- the idea was to set a different CC and notify the user terminal.
- extended CC and / or UCC are defined separately from existing PCC and SCC, and that control / operation different from existing SCC is applied (see FIG. 5).
- a CC to which control / operation different from PCC and SCC in the existing system (Rel. 10-Rel. 12) is also referred to as TCC (Tertiary CC), TCell, third CC, or third cell.
- TCC Tetiary CC
- the TCC can be composed of a license CC and / or an unlicense CC.
- a user terminal in which TCC is set can apply control / operation (for example, random access operation) different from SCC to the TCC (see FIG. 5).
- control / operation for example, random access operation
- the user terminal establishes synchronization with respect to TCC by following a random access procedure different from PCC or SCC.
- a 1st aspect also in said TCC (when there exists UL Cell), implementing a random access procedure in order to establish UL timing is assumed.
- TCC TCC
- wireless resource without transmitting a random access preamble Send.
- FIG. 7 shows an outline of so-called collision-type random access (CBRA: Contention-Based Random Access) in random access.
- CBRA collision-type random access
- a user terminal when triggered (for example, UL data resuming), it transmits a random access preamble in the latest PRACH transmittable subframe. Specifically, a preamble randomly selected from a plurality of random access preambles (contention preamble) prepared in the cell is transmitted by PRACH. In this case, collision (Contention) may occur by using the same random access preamble between user terminals.
- a preamble randomly selected from a plurality of random access preambles (contention preamble) prepared in the cell is transmitted by PRACH.
- collision may occur by using the same random access preamble between user terminals.
- random access is composed of four steps.
- the user terminal UE transmits a random access preamble (PRACH) using a PRACH resource set in the cell (message (Msg: Message) 1).
- the radio base station eNB transmits a random access response (RAR) as a response (message 2).
- RAR random access response
- the user terminal UE attempts to receive the message 2 for a predetermined interval after transmitting the random access preamble. If reception of message 2 fails, message 1 is transmitted (retransmitted) again by increasing the transmission power of PRACH. Note that increasing the transmission power during signal retransmission is also referred to as power ramping.
- the user terminal UE compares the transmission power obtained by performing power ramping with the maximum transmission power P CMAX, c of the serving cell c that transmits the PRACH, and transmits the PRACH with the smaller transmission power of the two. . Therefore, even if power ramping is applied, the transmission power does not exceed P CMAX, c .
- the user terminal UE that has received the random access response transmits a data signal on a physical uplink shared channel (PUSCH) specified by the uplink grant included in the random access response (message 3).
- the radio base station eNB that has received the message 3 transmits a contention resolution message to the user terminal UE (message 4).
- the user terminal UE secures synchronization by the messages 1 to 4 and identifies the radio base station eNB, the user terminal UE completes the random access process and establishes a connection.
- transmission of a random access preamble (message 1) using the PRACH is also referred to as PRACH transmission
- reception of a random access response (message 2) corresponding to the PRACH is also referred to as RAR reception.
- identification information for identifying the terminal itself is transmitted via the PUSCH instead of the random access preamble (see FIG. 8).
- the identification information transmitted by the user terminal using the PUSCH may correspond to the random access message 3 of the existing system, or may be an extension of the message 3 or newly defined information.
- the radio base station can notify the user terminal in advance of information related to resources (PUSCH resources) that can be used for transmission of identification information, for example, by broadcast or individual signaling. Also, the radio base station can notify the user terminal of information on PUSCH resources using PCC / SCC. The user terminal can allocate identification information to the PUSCH based on the notified information on the PUSCH resource and transmit the identification information to the radio base station. In this case, identification information may be notified by selecting a predetermined PUSCH resource from the notified PUSCH resource.
- the user terminal includes CCCH (Common Control Channel) SDU (Service Date Unit) in the identification information if RRC (Radio Resource Control) is not set, and C-RNTI (Cell-Radio) if RRC is already connected.
- CCCH Common Control Channel
- SDU Service Date Unit
- C-RNTI Cell-Radio
- MAC Network Temporary Identifier
- CE Media Access Control
- CE Control Element
- the C-RNTI notified by the user terminal may be assigned to the PCC / SCC, or may be an identifier that can identify the user terminal, such as a special assignment assigned to the TCC. Any identifier can be used.
- TC-RNTI temporary C-RNTI
- C-RNTI C-RNTI
- RA-RNTI Random Access-Radio Network Temporary Identifier
- the radio base station Upon receiving the PUSCH from the user terminal, the radio base station performs identification processing of the user terminal, contention resolution processing, and the like, and transmits completion information indicating that these have been completed to the user terminal (see FIG. 8). ).
- the completion information transmitted by the radio base station may correspond to the random access message 4 of the existing system, or may be an extension of this message 4 or newly defined information.
- the completion information is not necessarily transmitted by the TCC which is an unlicensed carrier, and may be transmitted by a license carrier.
- the license carrier to which the completion signal is notified may be designated in advance by an upper layer (for example, RRC), for example.
- contention resolution MAC CE may be transmitted.
- the content of the contention resolution MAC CE may be a signal including the identifier of the user device (for example, C-RNTI MAC CE).
- collision type random access has been described as an example, but the present invention can also be applied to non-collision type random access.
- the radio base station allocates in advance a resource (non-collision time or frequency) used for PUSCH transmission to the user terminal, and the user terminal performs uplink transmission using the resource.
- the identifier included in the PUSCH transmission by the user terminal may include a special identifier different from the collision type random access.
- TCC which is an unlicensed carrier
- peripheral transmitters such as user terminals
- a random access preamble is transmitted.
- unnecessary transmission / reception processing such as receiving a response to this can be omitted.
- the second mode is characterized in that the identification information is transmitted, and the identification information is transmitted in one or a plurality of consecutive subframes.
- the messages 1 and 2 are transmitted in one subframe (1 ms).
- TCC it is also assumed that a plurality of user terminals belonging to the same cell perform listening at the same timing. In this case, at the time when interference is not detected as a listening result, the plurality of user terminals may request PUSCH.
- the identification information is transmitted using resources in the area. As a result, it is conceivable that contention of resources to which identification information is assigned occurs. The second aspect can be applied to such a case.
- the resource to which the identification information is allocated can be notified in advance by broadcast or individual signaling, but the allocated resource region is shared by a plurality of user terminals in order to improve resource utilization efficiency.
- resource contention may occur as in the above case.
- the second aspect may be applied to the first aspect as described above.
- identification information is transmitted in one or a plurality of consecutive subframes.
- user terminals UE # 1- # 4 transmit identification information over the number of subframes randomly determined in each terminal.
- user terminals UE # 1 and # 2 transmit identification information in each subframe over three consecutive subframes based on the number of subframes 3 determined at random.
- the user terminal UE # 3 transmits identification information in one subframe based on the number of subframes 1 determined at random.
- User terminal UE # 4 transmits identification information in each subframe over four consecutive subframes based on the number of subframes 4 determined at random.
- the user terminals UE # 1 to # 4 transmit identification information with lower transmission power than the transmission power of the final subframe in subframes other than the final subframe.
- identification information is not transmitted with a low transmission output (for example, user terminal UE # 3 in FIG. 9).
- the data to be transmitted may be the same as the data transmitted with high transmission power, or any signal such as a random sequence or padding. Note that the value of the low transmission power may be notified in advance from the radio base station.
- a method of notifying an absolute value may be used. For example, it may be notified from the radio base station using the maximum transmission power of the cell, the maximum transmission power of the user terminal, or a relative value (for example, percentage) with respect to the transmission power value used in the final subframe.
- the radio base station selects the user terminal. It is assumed that the conflict resolution cannot be completed by identifying. In this case, the completion information is not sent from the radio base station to the user terminal, and the user terminal determines that the random access has failed. The user terminal that has determined that the random access has failed fails to perform ramping (increase transmission power) and transmit the identification information again after completion of the next listening.
- user terminals UE # 1 and UE # 2 determine the same number of subframes (3 subframes) and transmit identification information based on the number of subframes. As a result, it is assumed that one or both user terminals fail in random access. After determining that the random access has failed, each of the user terminals UE # 1 and # 2 determines the number of subframes again according to the completion of listening. Here, the user terminal UE # 1 determines the number of subframes 2, and the user terminal UE # 2 determines the number of subframes 1.
- User terminal UE # 1 transmits identification information over two subframes, but transmits identification information with power ramped in the last subframe (second subframe).
- the user terminal UE # 2 transmits the identification information with the power ramped in the first subframe.
- the radio base station can normally receive the identification information from the user terminal UE # 2 in the first subframe, and performs processing according to the identification information Can do.
- the radio base station can normally receive the identification information from the user terminal UE # 1 in the second subframe, and can perform processing according to this identification information.
- the ramping step used for the ramping (the increase value or the increase rate means the range of how much the transmission power is increased in the next transmission) It may be applied to the frame.
- the transmission power is also increased in the subframe before the final subframe.
- the identification information may be transmitted by increasing the transmission power over the determined number of subframes (see FIG. 10B).
- the ramping step may be notified in advance from the radio base station.
- a value used for ramping a value set in the PCC / SCC may be used, or a special value for the TCC may be notified from the radio base station.
- the number of subframes to be transmitted with high transmission power, such as the last subframe, among consecutive subframes may be increased to make collision easier.
- the number of subframes is determined at random, so that the last subframe does not have the same timing. Desired data, for example, identification information can be appropriately transmitted. Even in the case of random access failure, since the subframe is determined again at random, data (identification information) can be effectively retransmitted. In addition, ramping can be applied for retransmission. Thereby, even when the number of CCs that can be set in the user terminal is expanded from the existing system and / or when CA is performed using the unlicensed CC, communication can be appropriately performed.
- FIG. 11 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- the radio communication system shown in FIG. 11 is a system including, for example, an LTE system, SUPER 3G, LTE-A system, and the like.
- carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of component carriers (PCC, SCC, TCC) are integrated can be applied.
- This wireless communication system may be called IMT-Advanced, or may be called 4G, 5G, FRA (Future Radio Access), or the like.
- a radio communication system 1 shown in FIG. 11 includes a radio base station 11 that forms a macro cell C1, and radio base stations 12a-12c that are arranged in the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. . Moreover, the user terminal 20 is arrange
- the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12 (12a-12c). It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 that use different frequencies simultaneously by CA or DC. Further, the user terminal 20 can apply CA or DC using at least six or more CCs (cells). As an example, the macro cell C1 can be set as a PCell (PCC) and the small cell C2 as a SCell (SCC) and / or a TCell (TCC) in a user terminal. In addition, a license band and / or an unlicensed band can be set as the TCC.
- PCC PCell
- SCC SCell
- TCC TCell
- a license band and / or an unlicensed band can be set as the TCC.
- Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (referred to as an existing carrier or a legacy carrier).
- a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
- a wide bandwidth may be used between the user terminal 20 and the radio base station 12, or The same carrier may be used.
- a wired connection optical fiber, X2 interface, etc.
- a wireless connection may be employed between the wireless base station 11 and the wireless base station 12 (or between the two wireless base stations 12).
- the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
- the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
- RNC radio network controller
- MME mobility management entity
- Each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
- the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
- the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
- the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
- Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal but also a fixed communication terminal.
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
- SC-FDMA is a single-carrier transmission scheme that reduces interference between terminals by dividing the system bandwidth into bands consisting of one or continuous resource blocks for each terminal and using a plurality of terminals with mutually different bands. is there.
- the uplink and downlink radio access methods are not limited to these combinations.
- downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, and predetermined SIB (System Information Block) are transmitted by PDSCH. Moreover, MIB (Master Information Block) etc. are transmitted by PBCH.
- PDSCH downlink shared channel
- PBCH Physical Broadcast Channel
- SIB System Information Block
- MIB Master Information Block
- Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
- Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- the HAICH transmission confirmation signal (ACK / NACK) for PUSCH is transmitted by PHICH.
- the EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel) and may be used to transmit DCI or the like in the same manner as the PDCCH.
- a downlink reference signal a cell-specific reference signal (CRS), a channel state measurement reference signal (CSI-RS), a user-specific reference signal used for demodulation includes reference signals (DM-RS: Demodulation Reference Signal).
- CRS cell-specific reference signal
- CSI-RS channel state measurement reference signal
- DM-RS Demodulation Reference Signal
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), and a random access channel (PRACH) shared by each user terminal 20 are used. Physical Random Access Channel) is used. User data and higher layer control information are transmitted by PUSCH. Further, downlink radio quality information (CQI: Channel Quality Indicator), a delivery confirmation signal (HARQ-ACK), and the like are transmitted by PUCCH.
- CQI Channel Quality Indicator
- HARQ-ACK delivery confirmation signal
- a random access preamble (RA preamble) for establishing a connection with the cell is transmitted by the PRACH.
- FIG. 12 is a diagram illustrating an example of the overall configuration of a radio base station according to an embodiment of the present invention.
- the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
- the transmission / reception unit 103 includes a transmission unit and a reception unit.
- User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access
- Retransmission control for example, transmission processing of HARQ (Hybrid Automatic Repeat reQuest)
- HARQ Hybrid Automatic Repeat reQuest
- IFFT inverse Fast Fourier Transform
- precoding processing etc.
- the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to each transmitting / receiving unit 103.
- Each transmission / reception unit 103 converts the baseband signal output by precoding from the baseband signal processing unit 104 for each antenna to a radio frequency band and transmits the converted signal.
- the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
- the transmission / reception unit 103 can transmit information related to a CC performing CA (for example, information on a cell serving as a TCC). Further, the transmission / reception unit 103 can notify the user terminal of an instruction of a reception operation and / or a random access operation in TCC using PCC and / or SCC downlink control information (PDCCH / EPDCCH).
- the transmission / reception unit 103 can be a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
- the radio frequency signal received by each transmitting / receiving antenna 101 is amplified by the amplifier unit 102.
- Each transmitting / receiving unit 103 receives the upstream signal amplified by the amplifier unit 102.
- the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
- the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- Decoding, MAC retransmission control reception processing, RLC layer, and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
- the call processing unit 105 performs call processing such as communication channel setting and release, status management of the radio base station 10, and radio resource management.
- the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
- the transmission path interface 106 may transmit and receive signals (backhaul signaling) to and from the adjacent radio base station 10 via an inter-base station interface (for example, an optical fiber or an X2 interface).
- FIG. 13 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment. Note that FIG. 13 mainly shows functional blocks of characteristic portions in the present embodiment, and the wireless base station 10 also has other functional blocks necessary for wireless communication. As illustrated in FIG. 13, the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit (generation unit) 302, a mapping unit 303, and a reception signal processing unit 304. .
- the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit (generation unit) 302, a mapping unit 303, and a reception signal processing unit 304.
- the control unit (scheduler) 301 controls scheduling (for example, resource allocation) of downlink data signals transmitted on PDSCH and downlink control signals transmitted on PDCCH and / or EPDCCH. It also controls scheduling of system information, synchronization signals, paging information, CRS, CSI-RS, and the like.
- the control unit 301 controls transmission of a DL signal for an unlicensed CC (for example, TCC) based on the result of LBT.
- TCC unlicensed CC
- the control unit 301 may perform control so as to notify the user terminal of the LBT result in the license band (PCC and / or SCC).
- the control unit 301 can set the transmission cycle of the downlink reference signal (for example, CRS, CSI-RS) longer than the SCC and the transmission interval shorter than the SCC in the TCC.
- control unit 301 controls scheduling of an uplink reference signal, an uplink data signal transmitted by PUSCH, an uplink control signal transmitted by PUCCH and / or PUSCH, a random access preamble transmitted by PRACH, and the like. For example, in a random access operation, when a PUSCH is received from a user terminal, a user terminal identification process or a collision resolution process is performed, and completion information is transmitted to the user terminal (see FIG. 8). In receiving such PUSCH, for example, when a random access procedure is performed via TCC, reception of a random access preamble and transmission of a random access response can be omitted.
- the control unit 301 can be a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 302 generates a DL signal based on an instruction from the control unit 301 and outputs the DL signal to the mapping unit 303. For example, based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a DL assignment that notifies downlink signal allocation information and a UL grant that notifies uplink signal allocation information. Further, the downlink data signal is subjected to coding processing and modulation processing according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI) from each user terminal 20.
- the transmission signal generation unit 302 can be a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
- the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 103.
- the mapping unit 303 can be a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 receives UL signals (for example, a delivery confirmation signal (HARQ-ACK), a data signal transmitted on the PUSCH, a random access preamble transmitted on the PRACH, etc.) transmitted from the user terminal. Processing (for example, demapping, demodulation, decoding, etc.) is performed. The processing result is output to the control unit 301.
- UL signals for example, a delivery confirmation signal (HARQ-ACK), a data signal transmitted on the PUSCH, a random access preamble transmitted on the PRACH, etc.
- Processing for example, demapping, demodulation, decoding, etc.
- the processing result is output to the control unit 301.
- the received signal processing unit 304 may measure received power (for example, RSRP (Reference Signal Received Power)), received quality (RSRQ (Reference Signal Received Quality)), channel state, and the like using the received signal. .
- the measurement result may be output to the control unit 301. Note that a measurement unit that performs a measurement operation using the received signal may be provided separately from the reception signal processing unit 304.
- the reception signal processing unit 304 may be composed of a signal processor, a signal processing circuit or a signal processing device, and a measuring device, a measurement circuit or a measuring device which are described based on common recognition in the technical field according to the present invention. it can.
- FIG. 14 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
- the user terminal 20 includes a plurality of transmission / reception antennas 201 for MIMO transmission, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
- the transmission / reception unit 203 may include a transmission unit and a reception unit.
- the radio frequency signals received by the plurality of transmission / reception antennas 201 are each amplified by the amplifier unit 202.
- Each transmitting / receiving unit 203 receives the downlink signal amplified by the amplifier unit 202.
- the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
- the transmission / reception unit 203 When performing a random access procedure via TCC (TCell), the transmission / reception unit 203 transmits identification information for identifying its own terminal using a predetermined radio resource without transmitting a random access preamble. Can do. Further, when transmitting the identification information via the TCC, the identification information may be transmitted in each subframe over one or consecutive subframes based on the randomly determined number of subframes.
- the transmission / reception unit 203 can be a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
- the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
- the downlink user data is transferred to the application unit 205.
- the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer.
- broadcast information in the downlink data is also transferred to the application unit 205.
- uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
- the baseband signal processing unit 204 performs retransmission control transmission processing (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
- the data is transferred to the transmission / reception unit 203.
- the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
- the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
- FIG. 15 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment. Note that FIG. 15 mainly shows functional blocks of characteristic portions in the present embodiment, and the user terminal 20 also has other functional blocks necessary for wireless communication. As illustrated in FIG. 15, the baseband signal processing unit 204 included in the user terminal 20 includes a control unit 401, a transmission signal generation unit 402, a mapping unit 403, and a reception signal processing unit 404.
- the control unit 401 obtains, from the received signal processing unit 404, a downlink control signal (a signal transmitted by PDCCH / EPDCCH) and a downlink data signal (a signal transmitted by PDSCH) transmitted from the radio base station 10.
- the control unit 401 generates an uplink control signal (for example, an acknowledgment signal (HARQ-ACK)) or an uplink data signal based on a downlink control signal, a result of determining whether retransmission control is necessary for the downlink data signal, or the like.
- HARQ-ACK acknowledgment signal
- the control unit 401 can control the transmission signal generation unit 402, the mapping unit 403, and the reception signal processing unit 404. For example, when the user terminal applies CA using TCC (see FIGS. 5 and 6), the control unit 401 applies a reception operation and / or random access operation different from PCC and / or SCC to the TCC. Control to do.
- the control unit 401 transmits the identification information using a predetermined radio resource without transmitting the random access preamble. Then, an instruction is sent to the transmission signal generation unit 402 and the mapping unit 403 (see FIG. 8).
- control unit 401 transmits one or consecutive subframes based on the number of subframes determined at random in transmission of identification information via the TCC, and transmits each subframe. Identification information can be transmitted (see FIGS. 9 and 10).
- the control unit 401 may perform ramping (increase transmission power) and transmit the identification information again after the completion of the next listening.
- the control unit 401 may be a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 402 generates a UL signal based on an instruction from the control unit 401 and outputs the UL signal to the mapping unit 403. For example, the transmission signal generation unit 402 generates an uplink control signal such as a delivery confirmation signal (HARQ-ACK) or channel state information (CSI) based on an instruction from the control unit 401.
- HARQ-ACK delivery confirmation signal
- CSI channel state information
- the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
- the transmission signal generation unit 402 may be a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
- the mapping unit 403 maps the uplink signal (uplink control signal and / or uplink data) generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio resource to the transmission / reception unit 203.
- the mapping unit 403 may be a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 404 performs reception processing (for example, demapping and demodulation) on a DL signal (for example, a downlink control signal transmitted from a radio base station using PDCCH / EPDCCH, a downlink data signal transmitted using PDSCH, etc.). , Decryption, etc.).
- the reception signal processing unit 404 outputs information received from the radio base station 10 to the control unit 401.
- the reception signal processing unit 404 outputs broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401, for example.
- the reception signal processing unit 404 can control the reception operation of the DL signal based on an instruction from the control unit 401. For example, when TCC is set in the user terminal, the reception signal processing unit 404 can perform a reception operation different from PCC and / or SCC based on an instruction from the control unit 401.
- the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention. Further, the reception signal processing unit 404 can constitute a reception unit according to the present invention.
- each functional block is realized by one physically coupled device, or may be realized by two or more physically separated devices connected by wire or wirelessly and by a plurality of these devices. Good.
- radio base station 10 and the user terminal 20 are realized using hardware such as ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). May be.
- the radio base station 10 and the user terminal 20 may be realized by a computer apparatus including a processor (CPU), a communication interface for network connection, a memory, and a computer-readable storage medium holding a program. Good.
- the processor and memory are connected by a bus for communicating information.
- the computer-readable recording medium is a storage medium such as a flexible disk, a magneto-optical disk, a ROM, an EPROM, a CD-ROM, a RAM, and a hard disk.
- the program may be transmitted from a network via a telecommunication line.
- the radio base station 10 and the user terminal 20 may include an input device such as an input key and an output device such as a display.
- the functional configurations of the radio base station 10 and the user terminal 20 may be realized by the hardware described above, may be realized by a software module executed by a processor, or may be realized by a combination of both.
- the processor controls the entire user terminal by operating an operating system. Further, the processor reads programs, software modules and data from the storage medium into the memory, and executes various processes according to these.
- the program may be a program that causes a computer to execute the operations described in the above embodiments.
- the control unit 401 of the user terminal 20 may be realized by a control program stored in a memory and operated by a processor, and may be realized similarly for other functional blocks.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
第1の態様では、上記TCCにおいても(UL Cellがある場合)、ULタイミングを確立するためにランダムアクセス手順を実施することを想定する。第1の態様では、ユーザ端末がTCC(TCell)を介して、ランダムアクセス手順を行う場合、ランダムアクセスプリアンブルを送信することなく、所定の無線リソースを用いて、自端末を識別するための識別情報を送信する。
次に第2の態様について説明する。第2の態様は、上記識別情報の送信について特徴を有するものであり、識別情報の送信を1つもしくは連続する複数のサブフレームで行うものである。
以下、本発明の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本発明の実施形態に係る無線通信方法が適用される。なお、上記の各実施形態に係る無線通信方法は、それぞれ単独で適用されてもよいし、組み合わせて適用してもよい。
図12は、本発明の一実施形態に係る無線基地局の全体構成の一例を示す図である。無線基地局10は、複数の送受信アンテナ101と、アンプ部102と、送受信部103と、ベースバンド信号処理部104と、呼処理部105と、伝送路インターフェース106とを備えている。なお、送受信部103は、送信部及び受信部で構成される。
図14は、本実施形態に係るユーザ端末の全体構成の一例を示す図である。ユーザ端末20は、MIMO伝送のための複数の送受信アンテナ201と、アンプ部202と、送受信部203と、ベースバンド信号処理部204と、アプリケーション部205と、を備えている。なお、送受信部203は、送信部及び受信部から構成されてもよい。
Claims (9)
- 複数のコンポーネントキャリア(CC:Component Carrier)を用いたキャリアアグリゲーションを利用して無線基地局と通信するユーザ端末であって、
各CCを介してUL信号を送信する送信部と、
前記送信部における送信動作を制御する制御部と、を有し、
複数のCCとして、少なくとも既存システムのプライマリCCに対応する第1のCCと、前記第1のCC及び既存システムのセカンダリCCに対応する第2のCCとは異なる第3のCCと、が設定される場合、前記制御部は、第3のCCに対して第1及び第2のCCとは異なるランダムアクセス動作を適用することを特徴とするユーザ端末。 - 前記制御部は、ランダムアクセスプリアンブルを送信することなく、前記第3のCCの所定の無線リソースを用いて前記ユーザ端末を識別する識別情報を送信することを特徴とする請求項1に記載のユーザ端末。
- 前記所定の無線リソースは、予め設定されたPUSCH(Physical Uplink Shared Channel)領域から前記制御部が選択したリソースであることを特徴とする請求項2に記載のユーザ端末。
- 前記制御部は、前記所定の無線リソースを用いた前記識別情報の送信を1つもしくは連続する複数のサブフレームで行うことを特徴とする請求項2又は3に記載のユーザ端末。
- 前記制御部は、前記識別情報を送信するサブフレーム数をランダムに決定することを特徴とする請求項4に記載のユーザ端末。
- 前記制御部は、前記識別情報の送信においてランピングを適用することを特徴とする請求項2又は3に記載のユーザ端末。
- 前記識別情報の送信に応じた完了情報を前記無線基地局から受信する受信部をさらに有することを特徴とする請求項2から請求項6のいずれかに記載のユーザ端末。
- 複数のコンポーネントキャリア(CC:Component Carrier)を用いたキャリアアグリゲーションを利用するユーザ端末と通信する無線基地局であって、
前記ユーザ端末からのUL信号を受信する受信部と、
前記ユーザ端末の識別が完了した場合に、識別完了を通知するDL信号を送信する送信部と、
前記受信部及び前記送信部を制御する制御部と、を有し、
複数のCCとして、少なくとも既存システムのプライマリCCに対応する第1のCCと、前記第1のCC及び既存システムのセカンダリCCに対応する第2のCCとは異なる第3のCCと、がユーザ端末に設定される場合、前記制御部は、第3のCCに対して第1及び第2のCCとは異なるランダムアクセス動作を適用することを特徴とする無線基地局。 - 複数のコンポーネントキャリア(CC:Component Carrier)を用いたキャリアアグリゲーションを利用して無線基地局と通信するユーザ端末における無線通信方法であって、
各CCを介してUL信号を送信する工程と、
前記送信する工程における送信動作を制御する工程と、を有し、
複数のCCとして、少なくとも既存システムのプライマリCCに対応する第1のCCと、前記第1のCC及び既存システムのセカンダリCCに対応する第2のCCとは異なる第3のCCと、が設定される場合、前記制御する工程において、第3のCCに対して第1及び第2のCCとは異なるランダムアクセス動作を適用することを特徴とする無線通信方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201680010928.5A CN107251632A (zh) | 2015-02-19 | 2016-02-19 | 用户终端、无线基站及无线通信方法 |
JP2017500745A JPWO2016133185A1 (ja) | 2015-02-19 | 2016-02-19 | ユーザ端末、無線基地局及び無線通信方法 |
US15/547,862 US20170359155A1 (en) | 2015-02-19 | 2016-02-19 | User terminal, radio base station and radio communication method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015030843 | 2015-02-19 | ||
JP2015-030843 | 2015-02-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016133185A1 true WO2016133185A1 (ja) | 2016-08-25 |
Family
ID=56692357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/054788 WO2016133185A1 (ja) | 2015-02-19 | 2016-02-19 | ユーザ端末、無線基地局及び無線通信方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170359155A1 (ja) |
JP (1) | JPWO2016133185A1 (ja) |
CN (1) | CN107251632A (ja) |
WO (1) | WO2016133185A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019039195A1 (ja) * | 2017-08-24 | 2019-02-28 | 日立オートモティブシステムズ株式会社 | 無線通信システム、無線局及び移動体の情報共有方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016163802A1 (ko) * | 2015-04-09 | 2016-10-13 | 엘지전자 주식회사 | 비면허 대역을 지원하는 무선접속시스템에서 cca를 수행하는 방법 및 이를 지원하는 장치 |
US10517021B2 (en) | 2016-06-30 | 2019-12-24 | Evolve Cellular Inc. | Long term evolution-primary WiFi (LTE-PW) |
JP7379328B2 (ja) * | 2018-04-17 | 2023-11-14 | 株式会社Nttドコモ | 端末、無線通信方法、基地局及びシステム |
JP7148607B2 (ja) * | 2018-06-28 | 2022-10-05 | 株式会社Nttドコモ | 端末、無線通信方法、及びシステム |
US11019665B2 (en) * | 2018-10-30 | 2021-05-25 | Qualcomm Incorporated | Multiple Msg1 for PDCCH ordered RACH |
US20220015079A1 (en) * | 2018-11-16 | 2022-01-13 | Nokia Solutions And Networks Oy | Data transmission control |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001257639A (ja) * | 2000-01-07 | 2001-09-21 | Lucent Technol Inc | 半同時送受話式の動作と統計的な多重送信とに適した、フルレートのチャネルをインターリーブする方法及びシステム |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6813252B2 (en) * | 2000-01-07 | 2004-11-02 | Lucent Technologies Inc. | Method and system for interleaving of full rate channels suitable for half duplex operation and statistical multiplexing |
JPWO2009038074A1 (ja) * | 2007-09-18 | 2011-01-06 | シャープ株式会社 | 無線通信システム、基地局装置、移動局装置およびランダムアクセス方法 |
US9363798B2 (en) * | 2011-03-11 | 2016-06-07 | Lg Electronics Inc. | Method and device for terminal to transmit/receive signal in wireless communication system having carrier aggregation technique applied thereto |
-
2016
- 2016-02-19 US US15/547,862 patent/US20170359155A1/en not_active Abandoned
- 2016-02-19 CN CN201680010928.5A patent/CN107251632A/zh active Pending
- 2016-02-19 WO PCT/JP2016/054788 patent/WO2016133185A1/ja active Application Filing
- 2016-02-19 JP JP2017500745A patent/JPWO2016133185A1/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001257639A (ja) * | 2000-01-07 | 2001-09-21 | Lucent Technol Inc | 半同時送受話式の動作と統計的な多重送信とに適した、フルレートのチャネルをインターリーブする方法及びシステム |
Non-Patent Citations (2)
Title |
---|
HUAWEI ET AL.: "Analysis on the support of UL transmission for LAA", 3GPP TSG-RAN WG1#80, RL-150048, 3GPP, 18 February 2015 (2015-02-18) * |
NTT DOCOMO, INC: "Discussion on issues related to DL+UL option of LAA", 3GPP TSG-RAN WG1#80, RL-150417, 3GPP, 18 February 2015 (2015-02-18) * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019039195A1 (ja) * | 2017-08-24 | 2019-02-28 | 日立オートモティブシステムズ株式会社 | 無線通信システム、無線局及び移動体の情報共有方法 |
JP2019041196A (ja) * | 2017-08-24 | 2019-03-14 | 日立オートモティブシステムズ株式会社 | 無線通信システム、無線局及び移動体の情報共有方法 |
KR20200022030A (ko) * | 2017-08-24 | 2020-03-02 | 히다치 오토모티브 시스템즈 가부시키가이샤 | 무선 통신 시스템, 무선국 및 이동체의 정보 공유 방법 |
CN110999505A (zh) * | 2017-08-24 | 2020-04-10 | 日立汽车系统株式会社 | 无线通信系统、无线站及移动体的信息共享方法 |
KR102278397B1 (ko) * | 2017-08-24 | 2021-07-19 | 히다치 아스테모 가부시키가이샤 | 무선 통신 시스템, 무선국 및 이동체의 정보 공유 방법 |
US11224026B2 (en) | 2017-08-24 | 2022-01-11 | Hitachi Astemo, Ltd. | Wireless communication system, wireless station, and mobile object information sharing method |
CN110999505B (zh) * | 2017-08-24 | 2023-11-10 | 日立安斯泰莫株式会社 | 无线通信系统、无线站及移动体的信息共享方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2016133185A1 (ja) | 2017-12-14 |
US20170359155A1 (en) | 2017-12-14 |
CN107251632A (zh) | 2017-10-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6865504B2 (ja) | 端末及び無線通信方法 | |
US11089574B2 (en) | User terminal, radio base station and radio communication method | |
JP6337155B2 (ja) | 無線基地局及び無線通信方法 | |
JP6961484B2 (ja) | 端末、無線通信方法及びシステム | |
JP6479963B2 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
WO2017170889A1 (ja) | ユーザ端末及び無線通信方法 | |
JP6457102B2 (ja) | ユーザ端末及び無線通信方法 | |
JP6317773B2 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
JP6797807B2 (ja) | 端末及び無線通信方法 | |
WO2017135347A1 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
WO2016133185A1 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
WO2017126579A1 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
WO2017135346A1 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
US11184123B2 (en) | Terminal and radio communication method | |
WO2016017355A1 (ja) | ユーザ端末、無線基地局、無線通信方法及び無線通信システム | |
WO2017110962A1 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
WO2017051837A1 (ja) | 無線基地局、ユーザ端末及び無線通信方法 | |
WO2017026488A1 (ja) | ユーザ端末、無線基地局及び無線通信方法 | |
JP6687567B2 (ja) | 無線基地局及び無線通信方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16752571 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15547862 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 2017500745 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16752571 Country of ref document: EP Kind code of ref document: A1 |