WO2015137698A1 - 무선 자원의 용도 변경을 지원하는 무선 통신 시스템에서 신호의 유효성 판단 방법 및 이를 위한 장치 - Google Patents
무선 자원의 용도 변경을 지원하는 무선 통신 시스템에서 신호의 유효성 판단 방법 및 이를 위한 장치 Download PDFInfo
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- downlink
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Classifications
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- 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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
-
- 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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
-
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for determining validity of a signal in a wireless communication system supporting change of use of a radio resource.
- a 3GPP LTE (3rd Generation Partnership Project Long Term Evolution (LTE)) communication system will be described.
- E-UMTSC Evolved Universal Mobile Telecommunications System
- UTS Universal Mobile Telecommunications System
- LTE Long Term Evolution
- an E, UMTS is located at an end of a user equipment (UE) and a base station (eNode B, eNB, network (E-UTRAN)) and connected to an external network (Access Gateway, AG)
- UE user equipment
- eNode B eNode B
- E-UTRAN network
- a base station can transmit multiple data streams simultaneously for broadcast service, multicast service and / or unicast service.
- the cell is set to one of bandwidths such as 1.25, 2.5, 5, 10, 15, and 20Mhz to provide downlink or uplink transmission service to multiple terminals. Different cells can be configured to provide different bandwidths.
- the base station controls data transmission and reception for a plurality of terminals. Downlink, For DL) data, the base station transmits downlink scheduling information to inform the corresponding terminal of time / frequency domain, encoding, data size, and HARQ Hybrid Automatic Repeat and reQuest (related information) related data.
- the base station transmits the uplink scheduling information to the terminal for uplink (Upl ink, UL) data, and informs the time / frequency domain, encoding, data size, HARQ related information, etc. that the terminal can use.
- An interface for transmitting user traffic or control traffic may be used between base stations.
- Core network (CN) can be composed of network nodes for special features such as AG and terminal users.
- the AG manages the mobility of the terminal in units of TA Vacking Areas).
- Wireless communication technology has been developed up to LTE based on WCDMA, but the demands and expectations of users and operators are continuously increasing.
- new technological advances are required to be competitive in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interface, and adequate power consumption of the terminal are required.
- the terminal reports the current channel state information periodically and / or aperiodically to the base station. Since the state information of the reported channel may include the results calculated in consideration of various situations, a more efficient reporting method is required.
- a signal reception method of a terminal that does not support Simul taneous Recept ion and Transition may be performed in a specific radio frame that is applied to a special subframe of a primary cell and a downlink subframe of a secondary cell.
- TDD time division duplex
- the method may further include receiving a downlink data channel (Physical Downlink Ink Shared CHannel, PDSCH) on the specific radio resource.
- a downlink data channel Physical Downlink Ink Shared CHannel, PDSCH
- the determining of the flexibility is performed only when the terminal is configured not to receive a downlink data channel (PDSCH) for a downlink subframe on the same time interval as the special subframe. It can be characterized by.
- PDSCH downlink data channel
- the acquisition of aggregated cells 1
- the terminal that does not support transmission and reception (Simul taneous Recept ion and Transition), the radio frequency unit;
- the processor is further configured to perform a process for the secondary cell on a specific radio resource corresponding to a special subframe of a primary cell (pri imary cel l) and a downlink subframe of a secondary cell (secondary cel l).
- the primary cell receives downlink control information and determining validity of the downlink control information according to an uplink-downlink configuration of the primary cell, wherein the downlink control information is determined by the primary cell; In the non-fal lback mode, it is determined to be invalid. Characterized in that the primary cell is determined to be valid when the secondary cell is TDD Tied duplex uplink-downlink configuration according to a fal lback mode and the secondary cell is cross-carrier scheduled according to the primary cell. do.
- a signal transmission method of a terminal that does not support Simultaneous Recept ion and Transmission includes a specific radio corresponding to a special subframe of a primary cell and a downlink subframe of a secondary cell 1.
- TDD time division duplex
- downlink HARQ reference configuration when the use of the radio resource is fixed, downlink HARQ reference configuration, uplink HARQ reference configuration, SIB based uplink-downlink configuration, uplink reference HARQ timeline, or downlink—HARQ time This may be the case corresponding to at least one uplink subframe among the lines.
- the method may further include transmitting an uplink data channel (Physical Uplink Ink Shared CHannel, PUSCH) on the specific radio resource.
- an uplink data channel Physical Uplink Ink Shared CHannel, PUSCH
- simultaneous transmission and reception of aggregated cells may be performed.
- a signal transmission method of a terminal that does not support Simultaneous Recept ion and Transmission may be performed on a specific radio resource corresponding to a special subframe of the primary cell (primary cel l) and a downlink subframe of the secondary cell (secondary eel 1).
- the secondary cell Receiving a SRS (Sounding Reference Signal) triggering message for the secondary cell; And said And determining the validity of the SRS triggering message according to the uplink-downlink configuration of the lie cell, wherein the SRS triggering message includes a non-fal lback mode. If the primary cell is TDD (Time Division Duplex) uplink-downlink configuration according to a fal lback mode and the specific radio resource is fixed for uplink use, it is determined to be valid. It is characterized by.
- TDD Time Division Duplex
- the SRS triggering message may be determined to be valid when an uplink data channel (PUSCH) and the SRS are simultaneously scheduled on the specific radio resource.
- PUSCH uplink data channel
- FIG. 1 schematically illustrates an E-UMTS network structure as an example of a wireless communication system.
- FIG. 2 illustrates a structure of a control plane and a user plane of a radio interface protocol between a terminal and an E-UTRAN based on the 3GPP radio access network standard.
- 3 illustrates physical channels used in a 3GPP system and a general signal transmission method using the same.
- FIG. 4 illustrates a structure of a wireless frame used in an LTE system.
- FIG. 5 illustrates a resource grid for a downlink slot.
- Figure 6 illustrates the structure of a downlink subframe.
- FIG. 7 illustrates a structure of an uplink subframe used in LTE.
- Figure 8 illustrates a Carrier Aggregat ion (CA) communication system.
- FIG. 10 is a diagram illustrating an EPDCCH and a PDSCH scheduled by EPDCCH.
- FIG. 11 illustrates a case in which legacy subframes are divided into a static subframe set and a floating subframe set in a TDD system environment.
- FIG. 12 illustrates a base station and a terminal that can be applied to an embodiment of the present invention.
- CDM code division mult iple access FDMA
- frequency division mult iple access FDMA
- time division mult iple access TDMA
- orthogonal frequency division mul t iple access FDMA
- SC-FDMA SC-FDMA
- CDMA can be used in various wireless access systems such as single carrier frequency division mult iple access.
- CDMA can be implemented with radio technologies such as UTRAOtaiversal Terrestrial Radio Access) or CDMA2000.
- TDMA can be implemented with wireless technologies such as Global System for Mobility Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolut ion (EDGE).
- GSM Global System for Mobility Communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolut ion
- 0FDMA may be implemented by a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.11 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), or the like.
- UTRA is part of the UMTSCUniversal Mobility Telecommuni- cation Systems.
- 3GPP (3rd Generat ion Partnership Project) Long term evolut ion (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA and employs 0FDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced
- 3GPP LTE Advanced
- the control plane refers to a path through which control messages used by a user equipment (UE) and a network to manage a call are transmitted.
- the user plane refers to a path through which data generated at an application layer, for example, voice data or Internet packet data, is transmitted.
- the physical layer which is the first layer, provides an information transfer service (Informat ion Transfer Service) to a higher layer by using a physical channel.
- the physical layer is connected to the upper medium access control layer through a trans antenna port channel. Data moves between the medium access control layer and the physical layer through the transport channel. Data moves between the physical channels between the physical layer on the sending and receiving sides.
- the physical channel utilizes time and frequency as radio resources.
- the physical channel is modulated by a 0rthogonal frequency diversity multiple access (0FDMA) scheme in the downlink, and modulated by a SC-FDMAC single carrier frequency diversity access (UL) scheme in the uplink.
- 0FDMA 0rthogonal frequency diversity multiple access
- SC-FDMAC single carrier frequency diversity access (UL) scheme in the uplink.
- the medium access control (MAC) layer of the second layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel.
- RLC radio link control
- the RLC layer of the second layer supports reliable data transmission.
- the function of the RLC layer may be implemented as a functional block inside the MAC.
- the packet data convergence protocol (PDCP) layer of the second layer efficiently transmits an IP packet such as IPv4 or IPv6 over a narrow bandwidth wireless interface. It performs header compression function to reduce unnecessary control information.
- a radio resource control (RRC) layer located at the bottom of the third layer is defined only in the control plane.
- the RRC layer is responsible for the control of logical channels, transport channels, and physical channels in association with radio bearer (RB) configuration (Ref igurat ion), reconfiguration (Re-conf igurat ion), and release (Release).
- RB means a service provided by the second layer for data transmission between the terminal and the network.
- the RRC layer of the terminal and the network exchanges RRC messages with each other. If there is an RRC connected between the terminal and the RC layer of the network, the terminal is in: RRC connected mode, otherwise the RRC idle state It is in Idle Mode.
- the non-access stratum (NAS) layer on top of the RRC negotiation performs functions such as session management and mobility management.
- One cell constituting the base station is set to a bandwidth amplification such as 1.4, 3, 5, 10, 15, 20Mhz, and provides downlink or uplink transmission service to multiple terminals. Different cells may be configured to provide different bandwidths.
- a downlink transport channel for transmitting data from a network to a terminal includes a broadcast channel (BCH) for transmitting system information, a paging channel (PCH) for transmitting a paging message, and a downlink shared channel (SCH) for transmitting a user traffic or control message.
- BCH broadcast channel
- PCH paging channel
- SCH downlink shared channel
- Traffic or control messages of a downlink multicast or broadcast service may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH).
- the uplink transmission channel for transmitting data from the terminal to the network includes a random access channel (RACH) for transmitting an initial control message, and an uplink shared channel (SCH) for transmitting a user traffic or control message.
- RACH random access channel
- SCH uplink shared channel
- the logical channel mapped to the transport channel, which is mapped to the transport channel is Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Mul
- 3 is a diagram for explaining physical channels used in a 3GPP LTE system and a general signal transmission method using the same.
- a user equipment that is powered on again or newly enters a cell performs an initial cell search operation such as synchronizing with a base station.
- the user equipment receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S—SCH) from the base station, synchronizes with the base station, and obtains information such as a cell ID.
- P-SCH Primary Synchronization Channel
- S—SCH Secondary Synchronization Channel
- the user equipment may receive a physical broadcast channel from the base station to obtain broadcast information in a cell.
- the user equipment may receive a downlink reference signal (DL 'RS) in the initial cell search step to check the downlink channel state.
- DL 'RS downlink reference signal
- the user equipment After the initial cell search, the user equipment performs physical downlink ink control channel (Physical Downl Ink Control Channel, PDCCH) and physical downlink control channel information according to physical downlink control channel information in step S302. , PDSCH) to obtain more specific system information.
- PDCCH Physical Downl Ink Control Channel
- PDSCH Physical Downlink control channel information
- the user equipment may perform a random access procedure such as steps S303 to S306 to complete the access to the base station.
- the user equipment transmits a preamble through a physical random access channel (PRACH) (S303), and a physical downlink control channel and a physical downlink shared channel to the preamble for the preamble.
- PRACH physical random access channel
- a response message may be received (S304).
- a content ion resolut ion procedure such as transmission of an additional physical random access channel (S305) and reception of a physical downlink control channel and a corresponding physical downlink shared channel (S306) are performed. can do.
- the user equipment which has performed the above-described procedure will then receive the physical downlink control channel / physical downlink shared channel as a general uplink / downlink signal transmission procedure.
- UCI uplink control information
- UCI includes HARQ ACK / NACKC Hybrid Automatic Repeat and reQuest Acknowledgment / Negative_ACK (SRCScheduling Request), Channel State Informat ion (CSI), and the like.
- SRCScheduling Request HARQ ACK / NAC is simply referred to as HARQ-ACK or ACK / NACK (A / N).
- HARQ-ACK includes at least one of positive ACK (simply ACK), negative ACK (NACK), DTX, and NACK / DTX.
- CSI includes a CQK channel quality indicator), a PMK Precoding Matrix Indi cator), a RKRank Indicat ion), and the like.
- UCI is generally transmitted through PUCCH, but can be transmitted through PUSCH when control information and traffic data should be transmitted at the same time. In addition, UCI can be aperiodically transmitted through PUSCH by network request / instruction.
- FIG. 4 is a diagram illustrating a structure of a radio frame used in a .LTE system.
- uplink / downlink data packet transmission is performed in subframe units, and one subframe includes a plurality of OFDM symbols. It is defined as a certain time interval.
- the 3GPP LTE standard supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- the downlink radio frame consists of 10 subframes, and one subframe consists of two slots in the time domain.
- the time taken for one subframe to be transmitted is called a transmission sequence interval ( ⁇ ).
- one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms.
- One slot includes a plurality of OFDM symbols in the time domain and includes a plurality of resource blocks (RBs) in the frequency domain.
- RBs resource blocks
- an OFDM symbol represents one symbol period.
- An OFDM symbol may also be referred to as an SC-FDMA symbol or symbol period.
- a resource block as a resource allocation unit (RB) may include a plurality of consecutive subcarriers in one slot.
- the number of 0FDM heartbeats included in one slot may vary depending on the configuration of CP Cycl i c Pref ix).
- CP has an extended CP (normal CP) and a normal CP (normal CP).
- the number of 0FDM symbols included in one slot may be seven.
- the 0FDM symbol is configured by an extended CP, since the length of one 0FDM symbol is increased, the number of 0FDM symbols included in one slot is smaller than that of the standard CP.
- the number of 0FDM symbols included in one slot may be six.
- an extended CP may be used to further reduce symbol interference.
- each subframe is allocated to the first up to three 0FDM cored PDCCHCphysical downl ink control channels).
- the remaining OFDM symbols may be allocated to a PDIS (physica I downl ink shared channel).
- Type 2 radio frame consists of two half frames, each half frame contains four general subframes including two slots, Down Ink Pi Lot Time Slot (DwPTS), and Guard Per It consists of a special subframe including iod, GP) and UpPTSOJpl ink Pi lot time slot).
- DwPTS Down Ink Pi Lot Time Slot
- Guard Per It consists of a special subframe including iod, GP) and UpPTSOJpl ink Pi lot time slot).
- DwPTS is used for initial cell search, synchronization, or channel estimation in a user equipment.
- UpPTS is used for channel estimation at base station and synchronization of uplink transmission of user equipment. That is, DwPTS is used for downlink transmission and UpPTS is used for uplink transmission.
- UpPTS is used for PRACH preamble or SRS transmission.
- the guard interval is a section for removing interference caused by the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
- the 3GPP standard document defines the configuration as shown in Table 1 below with respect to the special subframe.
- the structure of the type 2 radio frame that is, UL / DL ring sub-frame configuration (UL / DL conf igurat ion) in the TDD system is shown in Table 2 below.
- D denotes a downlink subframe
- U denotes an uplink subframe
- S denotes the special subframe.
- Table 2 also shows a downlink-uplink switching period in the uplink / downlink subframe configuration in each system.
- the structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of symbols included in the slot may be variously changed.
- FIG. 5 illustrates a resource grid for a downlink slot.
- the downlink slot includes OFDM symbols in the time domain and N resource blocks in the frequency domain. Since each resource block includes subcarriers, the downlink slot includes N X N subcarriers in the frequency domain.
- FIG. 5 illustrates that the downlink slot includes 70 FDM symbols and the resource block includes 12 subcarriers, but is not necessarily limited thereto.
- the number of 0FDM thimbles included in the downlink pilot may be modified according to the length of the Cyclic Pref ix (CP).
- Each element on the resource grid is called a Resource Element (RE), and one resource element is indicated by one 0FDM symbol index and one subcarrier index.
- One RB is represented by N ⁇ bx N resource elements. Consists of. The number of resource blocks included in the downlink slot ⁇ ⁇ depends on the downlink transmission bandwidth set in the cell.
- FIG. 6 illustrates a structure of a downlink subframe.
- up to three (4) 0FDM symbols located at the front of the first slot of a subframe are indicated in a control region to which a control channel is allocated. left
- the OFDM symbol corresponds to a data region to which a Physical Downlink Shared Channel (PDSCH) is allocated.
- Examples of downlink control channels used in LTE include PCF: Physical Control Format Indicator Channel (ICH), Physical 'Downlink Control Channel (PDCCH), Physical Hybrid ARQ indicator Channel (PHICH), and the like.
- PCFICH is transmitted in the first OFDM symbol of the subframe and carries information on the number of OFDM symbols used for transmission of the control channel in the subframe.
- the PHICH carries a HARQ ACK / NACK (Hybrid Automatic Repeat requestacknowledgment / negative-acknowledgment) signal in response to uplink transmission.
- HARQ ACK / NACK Hybrid Automatic Repeat requestacknowledgment / negative-acknowledgment
- DCI downlink control information
- the DCI includes resource allocation information and other control information for the user device or the user device group.
- the DCr includes uplink / downlink scheduling information, uplink transmission (Tx) power control command, and the like.
- the PDCCH includes transport format and resource allocation information of a downlink shared channel (DL-SCH), transport format and resource allocation information of an uplink shared channel (UL-SCH), and a paging channel.
- Px information on paging channel (PCH) Px information on paging channel (PCH)
- system information on DL-SCH resource allocation information of higher-layer control messages such as random access response transmitted on PDSCH, Tx power control command set for individual user devices in user device group , Tx power control command, activation instruction information of VoIPCVoice over IP).
- a plurality of PDCCHs may be transmitted in the control region.
- the user equipment can monitor multiple PDCCHs.
- the PDCCH is transmitted on an aggregation of one or a plurality of consecutive control channel elements (CCEs).
- CCEs control channel elements
- the CCE is a logical allocation unit used to provide a coding rate based on radio channel conditions to the PDCCH.
- the CCE corresponds to a plurality of resource element groups (REGs).
- the format of the PDCCH and the number of PDCCH bits are determined according to the number of CCEs.
- the base station is sent to the user equipment
- the PDCCH format is determined according to the DCI, and a CRC (cyclic redundancy check) is added to the control information.
- the CRC is masked with an identifier (eg, radio network temporary identifier (RTI)) according to the owner of the PDCCH or the purpose of use.
- RTI radio network temporary identifier
- an identifier eg, eel 1-RNTI (CR TI)
- PDCCH is for paging message
- a paging identifier eg, paging-RNTI (P-RNTI)
- P-RNTI paging-RNTI
- the SI-RNTKsystem Informat ion RNTI may be masked to the CRC.
- a random access-RNTI RA-RNTI
- FIG. 7 illustrates a structure of an uplink subframe used in LTE.
- an uplink subframe includes a plurality of (eg, two) slots.
- the slot may include different numbers of SC-FDMA symbols according to the CP length.
- the uplink subframe is divided into a data region and a control region in the frequency domain.
- the data area includes a PUSCH and is used to transmit data signals such as voice.
- the control region includes a PUCCH and is used to transmit Uplink Control Information (UCI).
- the PUCCH includes RB pairs located at both ends of the data region on the frequency axis and calls slot boundaries.
- the PUCCH may be used to transmit the following control information.
- -HARQ ACK / NAC This is a response signal for a downlink data packet on a PDSCH. Indicates whether the downlink data packet was successfully received. One bit of ACK / NACK is transmitted in response to a single downlink codeword, and two bits of ACK / NACK are transmitted in response to two downlink codewords.
- [72]-CSK Channel State Informat ion) Feedback information on a downlink channel.
- the CSI includes a CQKChannel Quality Indicator (MQ0), and feedback information related to the MIM0 (Mult iple Input Mult iple Output) includes a RI (Rank Indicator), a PMKPrecoding Matrix Indicator (RI), and a PTKPrecoding Type Indicator. 20 bits are used per subframe.
- the amount of control information (UCI) that a user equipment can transmit in a subframe depends on the number of SOFDMA available for transmission of control information.
- SO FDMA available for control information transmission means the remaining SC-FDMA symbols except for the SC-FDMA symbol for the reference signal transmission in the subframe, and the SRSCSounding Reference Signal) is set. For frames, the last SC-FDMA symbol of the subframe is also excluded.
- the reference signal is used for coherent detection of the PUCCH.
- FIG. 8 illustrates a Carrier Aggregat ion (CA) communication system.
- a plurality of uplink / downlink component carriers may be collected to support a wider uplink / downlink bandwidth.
- component carrier CC
- the term "component carrier (CC)” may be replaced with other equivalent terms (e.g., carrier, cell, etc.).
- Each of the CCs may be adjacent or non-adjacent to each other in the frequency domain.
- the bandwidth of each component carrier It can be determined independently. it is also possible that the number of the number and DL CC for UL CC other asymmetric carrier aggregation.
- the control information may be set to be transmitted and received only through the particular CC. This particular (X a primary CC ( Or anchor CC), and the remaining CCs may be referred to as secondary CCs.
- the PDCCH for downlink allocation may be transmitted on DL CC # 0, and the corresponding PDSCH may be transmitted on DL CC # 2.
- the introduction of a carrier indi- cator field may be considered:
- the presence of CIF in the PDCCH is semi-static and terminal-specific by higher layer signaling (e.g., RRC signaling). (Or UE group-specific) can be configured in.
- the baseline of the PDCCH transmission is as follows.
- a PDCCH on a DL CC can allocate a specific DL / UL (PDSCH or PUSCH resource on X) among a plurality of merged DL / UL CCs using the CIF.
- the base station may allocate the PDCCH monitoring DL CC set to reduce the BD complexity of the terminal.
- the PDCCH monitoring DL CC set includes one or more DL CCs as part of the combined total DL CCs, and the UE detects / decodes the PDCCH only on the corresponding DL CCs. That is, when the base station schedules PDSCH / PUSCH to the UE, the PDCCH is transmitted only through the PDCCH monitoring DL CC set.
- the PDCCH monitoring DL CC set may be configured in a UE-speci f i, a UE-group-specific or a cell-specific scheme.
- the term "PDCCH monitoring DL CC” ' may be replaced with equivalent terms such as monitoring carrier, monitoring 3 ⁇ 4, etc.
- the CC merged for the terminal may be replaced with equivalent terms such as serving CC, serving carrier, serving cell, etc. Can be.
- DL CC A is set to PDCCH monitoring DL CC.
- DL CC A to C may be referred to as a serving CC, a serving carrier, a serving cell, and the like.
- each DL CC can transmit only PDCCH scheduling its PDSCH without CIF according to LTE PDCCH configuration.
- DL CC A (Monitoring DL CC) schedules PDSCH of DL CC A using CIF.
- the PDCCH scheduling the PDSCH of another CC may be transmitted.
- PDCCH is not transmitted in DL CC B / C that is not configured as PDCCH monitoring DL CC.
- the DL CC A (monitoring DL CC) must include both the PDCCH search region associated with the DL CC A, the PDCCH search region associated with the DL CC B, and the PDCCH search region associated with the DL CC C. In this specification, it is assumed that the PDCCH search region is defined for each carrier.
- LTE-A considers the use of CIF in the PDCCH for cross-CC scheduling. Whether to use CIF (ie support for cross-CC scheduling mode or non-cross-CC scheduling mode) and switching between modes can be set semi-statically / terminal-specifically through RRC signaling, and the corresponding RRC signaling process Rough trailing Words can recognize whether CIF is used in the PDCCH to be scheduled to them.
- FIG. 10 is a diagram illustrating an EPDCCH and a PDSCH scheduled by an EPDCCH.
- an EPDCCH may generally define and use a portion of a PDSCH region for transmitting data, and a UE should perform a blind decoding process for detecting the presence or absence of its own EPDCCH. do.
- the EPDCCH performs the same scheduling operation as the legacy legacy PDCCH (ie PDSCH and PUSCH control), but when the number of UEs connected to a node such as RRH increases, more EPDCCHs are allocated in the PDSCH region. There may be a disadvantage that the complexity may increase due to an increase in the number of blind decodings to be performed.
- FIG. 11 illustrates a case where legacy subframes are divided into a static subframe set and a floating subframe set in a TDD system environment.
- the existing uplink-downlink configuration configured through the SIBCSystem Informat ion Block) signal is uplink-downlink configuration # 1 (that is, DSUUDDSUUD), and the base station uses a signal previously defined to the terminal. It is assumed that the reset information of the purpose of the radio resource is informed.
- the Reconf igurat ion message may appear later, i) including the time of receipt of the redirection message according to a pre-defined rule, or ii) or at the time of receipt of the redirection message. Iii) or the purpose of informing the purposes of radio resources appearing at a predefined time (i.e., after a subframe offset) from the time of receipt of the corresponding usage change message.
- UL-DL Conf igurat ion i.e., uplink-downlink configuration
- the terminal assumes when the reception method or a specific terminal fails to successfully receive a usage change message. Fallback operation and the like need to be defined.
- the situation in which the terminal does not successfully receive the usage change message is, for example, If the terminal is found to be false when performing the CRC (Cyclic Redundancy Check) on the received usage change message, if the terminal misses the usage change message (eg, due to DRX operation) The terminal may have missed the usage change message).
- CRC Cyclic Redundancy Check
- the reconfiguration message may be a higher layer signal type (eg SIB / PBCH / MAC / RRC) or a physical layer signal type (eg PDCCH / EPDCCH /) on a predefined cell (eg, Primary Cell, PCell).
- a higher layer signal type eg SIB / PBCH / MAC / RRC
- a physical layer signal type eg PDCCH / EPDCCH /
- the usage change message may also be UE-specific or cell-specific or UE-Group-Specific. Feature or UE group common (UE-Group-Co ⁇ on) may have a feature.
- the usage change message may be transmitted through a UE-Specific Search Space (USS) or CSSCC on the Search Space (USS) on a predefined cell (eg, PCell).
- USS UE-Specific Search Space
- CSSCC Search Space
- the channel measurement operation when the terminal decodes explicit L1 signaling for reconfiguration and detects a valid uplink-downlink configuration, the terminal explicitly expresses L1 signaling for reconfiguration. Only within subframes indicated by a DL subframe or a special subframe through.
- CSI side Decide If the UE does not detect the L1 signaling for transmitting a valid uplink-downlink configuration for a radio frame, the UE performs CSI only within subframes indicated by a downlink subframe or a special subframe according to the SIB configuration. It can be measured.
- the UE when the PDCCH or PDSCH reception operation is described, when the UE detects L1 signaling for transmitting a valid uplink-downlink configuration for a radio frame, the UE indicates non-signal indicated by explicit L1 signaling. Monitor the DRX downlink subframe or special subframe. If, when the terminal does not detect the L1 signaling for transmitting a valid uplink-downlink configuration for the radio frame, the terminal is a non-DRX downlink subframe for the PDCCH or EPDCCH indicated by the SIB-1 configuration or Monitor the special subframe.
- the downlink HARQ reference configuration may be selected from Re ⁇ 8 TDD uplink-downlink configuration ⁇ 2, 4, 5 ⁇ .
- TDD eIMTA Frether Enhancements to LTE Time Division Duplex (TDD) for Downl ink-Upl ink Interference Management and Traffic Adaptat ion
- uplink scheduling timing and HARQ timing are signaled through SIB1.
- TDD eIMTA Frether Enhancements to LTE Time Division Duplex (TDD) for Downl ink-Upl ink Interference Management and Traffic Adaptat ion
- uplink scheduling timing and HARQ timing are signaled through SIB1.
- the UL grant validity determination (UL grant val idat ion) will be described.
- the UE In the fallback mode, if the UE is not included in the set of uplink subframes for each DL HARQ reference conf igurat i on, the UE grants an uplink grant corresponding to at least one uplink subframe for each SIB1. If received, the terminal may determine this as valid control information (val id grant). However, if the UE receives a NACK on the PHICH triggering the PUSCH transmission in the uplink subframes per SIB1 without being included in the set of uplink subframes for each DL HARQ reference conf igurat ion, the UE receives the PUSCH. To Send.
- Type 1 SRS the determination of the subframe in which the Type 1 SRS transmission is scheduled when triggered is based on SIB1.
- SRS transmission may be configured on an uplink subframe or SIB1 based UpPTS.
- Falback Operation (Falback Operation) (or Falback Mode)
- the base station successfully transmits a zero usage change message.
- Malfunction of a terminal that has not been received eg, incorrect uplink data channel (PUSCH) and / or black uplink control channel (PUCCH) transmission due to control channel (PDCCH / EPDCCH) detection error (Fal se Detect ion)
- PUSCH incorrect uplink data channel
- PUCCH / EPDCCH control channel
- detection error Fal se Detect ion
- DL HARQ Buffer corrupt ion can be minimized.
- cells having different (Di f ferent) uplink-downlink settings are used as a carrier aggregation technique (CA), and the terminal simultaneously transmits / receives on the corresponding cells (Simult neous Recept ion (RX) and Transition (TX)) When it fails to perform an operation, it is defined to perform the transmission / reception of uplink / downlink signals based on constraints as shown in Table 3.
- CA carrier aggregation technique
- the UE shall not transmit: any signal or channel on a secondary cell in the same subframe
- the UE is not expected to receive any downlink transmissions on a secondary cell in the same subframe
- the UE is not expected to receive PDSCH / EPDCCH / PMCH / PRS transmissions in the secondary cell in the same subframe, and the UE is not expected to receive any other signals on the secondary cell in! OFDM symbols that overlaps with the guard period or UpPTS in the primary ceil. ; Accordingly, in the present invention, in a situation in which a carrier aggregation technique (CA) is applied, the radio resource usage on a specific cell is dynamically changed (ie, elMTA Cell) according to a load state, and the UE is aggregated cells.
- CA carrier aggregation technique
- DL Grant DL grant scheduling control information
- CA carrier aggregation technique
- a TDD elMTA PCell and a TDD (elMTA or ⁇ -eIMTA) SCell are used as a carrier aggregation technique, and the TDD elMTA PCell is a fallback mode (ie, SIB1 uplink-downward).
- black TDD elMTA PCell and TDD (elMTA or Non-elMTA) SCell are used as carrier aggregation techniques, and TDD elMTA PCell is operated in Non-Fa 11 back Mode. It may also be extended.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation scheme, and TDD elMTA PCell is used in fallback mode (ie, SIB1 uplink-downlink configuration).
- TDD elMTA PCell is used in fallback mode (ie, SIB1 uplink-downlink configuration).
- PDSCH downlink data channel
- DL Grant downlink Grant
- special subframe configuration related to SIB1 UL-DL configuration of TDD elMTA PCell is i) Special Sub frame Configurations 0 (w / Normal). Downlink CP) ii) Special Sub frame Configurations 5 (w / Normal Downlink CP), iii) Special Sub frame Configurations 0 (w / Extended Downlink CP), or iv) Special Sub frame Configurations 4 (w / Extended Do ⁇ link CP) It may be defined to be applied only if it is designated as at least one of (ie, when interpreted as "No PDSCH Transmission in DwPTS" according to Table 3).
- a special subframe (Special SF, on SIBl uplink-downlink configuration based on the fallback mode of the corresponding SF (that is, TDD elMTA PCell) is used. If the UE receives a DL Grant for scheduling the PDSCH on the FDD DL CC in the S SF of the TDD elMTA PCell, in the following S SF) and the DL SF on the FDD DL CC, the following rule 1-A or rule 1 -B can be applied.
- Rule 1-A The UE may determine that the DL Grant is invalid (Invalid) and may not perform a PDSCH reception operation at a corresponding SF position on the FDD DL CC. This is to prevent the malfunction of the terminal due to the detection error (False Detect ion) of the DL grant. That is, rule 1—A may determine that the UE does not expect to receive a signal such as PDSCH / EPDCCH / PMCH / PRS at the corresponding SF position on the FDD DL CC. In other words, it may be determined that the UE does not expect to receive any other signals in the SF region of the FDD DL CC overlapping at least one of a guard period (GP) or UpPTS of the TDD elMTA PCell.
- GP guard period
- UpPTS of the TDD elMTA PCell.
- Rule 1-B The UE determines that the corresponding DL Grant is valid (Valid), and may perform a PDSCH reception operation at a corresponding SF position on the FDD DL CC. That is, Rule 1-B may determine that the terminal expects ⁇ the signal reception such as the PDSCH / EPDCCH / PMCH / PRS from the SF position on the FDD DL CC. In other words, it may also be determined that the terminal expects to receive a predefined downlink signal in the SF region of the FDD DL CC overlapping with at least one of the GP or UpPTS of the TDD elMTA PCell (or the terminal is an FDD DL CC). SF can be interpreted as a DL SF of the corresponding position on the image).
- the UE receives a DL Grant for scheduling a PDSCH on the FDD DL CC in the PDCCH region on the FDD DL CC or the TDD elMTA PCell. If a DL Grant for scheduling a PDSCH on an FDD DL CC is received in a PDCCH region on an FDD DL CC in a region overlapping with a DwPTS region of S SF, the following rule 1-C or rule 1-D may be applied.
- Rule 1-C The UE determines that the corresponding DL Grant is invalid and may not perform a PDSCH reception operation at a corresponding SF position on the FDD DL CC. That is, rule 1-C may determine that the UE does not expect to receive a signal such as PDSCH / EPDCCH / PMCH / PRS at the corresponding SF position on the FDD DL CC. In other words, it may be determined that the UE does not expect to receive any other signals in the SF region of the FDD DL CC overlapping at least one of the guard period (GP) or UpPTS of the TDD elMTA PCel l. .
- GP guard period
- Rule 1-D The UE determines that the corresponding DL Grant is valid (val id), and may perform a PDSCH reception operation at a corresponding SF position on the FDD DL CC.
- the rule 1-D may determine that the UE expects to receive a signal such as PDSCH / EPDCCH / PMCH / PRS at a corresponding SF position on the FDD DL CC.
- the terminal may be determined that the terminal expects to receive a predefined downlink signal in the SF region of the FDD DL CC overlapping at least one of the GP or UpPTS of the TDD elMTA PCel l (the black terminal is The SF of the corresponding position on the FDD DL CC can be interpreted as a DL SF).
- rule 1-A is based on the non-fall back mode of the TDD elMTA PCel l. Even if the special subframe (Special SF) on the uplink-downlink configuration (black is Val id uplink-downlink configuration) of the downlink and the downlink subframe (DL SF) on the FDD DL CC Extension can be applied.
- Special subframe (Special SF) on the uplink-downlink configuration (black is Val id uplink-downlink configuration) of the downlink and the downlink subframe (DL SF) on the FDD DL CC Extension can be applied.
- T sub system configuration the assumption of the downlink signal / channel reception of the UE according to the special subframe configuration (T sub system configuration) in the TDD system environment is described in Table 1, Table 2 and Table 4 below (LTE / LTE). -A standard document 3GPP TS 36.213).
- msspof block is of ® s ecial s teae in hsx smctare typa 2 t tisan
- the following rule 2 ⁇ A black may determine the validity of DL grant related to downlink data channel (PDSCH) transmission on a corresponding TDD elMTA Cell according to Rule 2-B.
- rule 2-A black is rule 2B, i.
- Special Subframe Configurations 0 (w / Normal Downl ink CP), ii) black is SIB1 uplink-downlink configuration.
- Silver Speci l Subfr me Configurations 5 (w / Normal Downl ink CP) iii) Black Special Subframe Conf i gurations 0, (w / Extended Downlink GP) iv) or Special Sub frame ' Configurations 4 (w / Extended Downlink CP)' can be defined to be applied only when specified as at least one (that is, interpreted as "No PDSCH Transmission in DwPTS").
- Special Sub frame ' Configurations 4 (w / Extended Downlink CP)' can be defined to be applied only when specified as at least one (that is, interpreted as "No PDSCH Transmission in DwPTS").
- Rule 2-A The UE determines that the corresponding DL Grant is invalid (Invalid) and may not perform a PDSCH reception operation at the corresponding SF location.
- Rule 2-B The UE determines that the corresponding DL Grant is valid (Valid), and can perform PDSCH reception operation at the corresponding SF location (or even if the UE regards the SF of the corresponding location as DL SF). Interpretable).
- the radio resource usage on a specific cell is dynamically changed (that is, elMTA Cell) according to a load state under a situation in which carrier aggregation (CA) is applied, and a terminal simultaneously transmits on corresponding Cells (Aggregated Cells).
- CA carrier aggregation
- PUSCH uplink data channel
- CA carrier aggregation technique
- the present invention uses three or more cells as a carrier aggregation technique (CA). It is obvious that it can be extended to any situation.
- the OTDD elMTA PCel 1 and the TDD (elMTA or Non-elMTA) SCell are used as a carrier aggregation scheme, and the TDD elMTA PCell is a fallback mode (ie, SIB1 uplink-downlink).
- TDD elMTA PCell and TDD (elMTA or ⁇ -eIMTA) SCell are used as carrier aggregation techniques and can be extended even if the TDD elMTA PCell is operated in non-fallback mode. have.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation scheme, and TDD elMTA PCell is used as a fallback mode (ie, SIB1 uplink-downlink configuration).
- TDD elMTA PCell is used as a fallback mode (ie, SIB1 uplink-downlink configuration).
- UL Grant scheduling information
- PUSCH uplink data channel
- rule 3A to rule 3-C will be described first.
- Rule 3-A i) downlink HARQ reference configuration of a TDD elMTA PCell (on FDD UL CC) is ii) black uplink HARQ reference configuration (iii) or SIB1 UL according to at least one of uplink-downlink configuration, iv) or UL-Reference HARQ Timeline, v) or DL-Reference HARQ Timeline. According to whether or not to be performed at the same position as the SF position, the validity (Validation) of the corresponding UL Grant may be determined.
- Rule 3—C The UE determines that a corresponding UL Grant is always valid (Valid), and may perform a PUSCH transmission operation in an FDD UL CC.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation technique, and TDD elMTA PCell is a non-fall back mode (ie, liquid).
- Scheduling related to uplink data channel (PUSCH) transmission on the FDD SCell based on rule 3-D when operated with an actual uplink-downlink configuration (or a valid uplink-downlink configuration)
- the validity of the ring information (UL Grant) can be determined.
- the radio resource usage on a specific cell is dynamically changed (ie, elMTA Cell) according to a load state in a situation in which a carrier aggregation technique (CA) is applied, and a UE simultaneously transmits on corresponding Cells (Aggregated Cells).
- CA carrier aggregation technique
- A-SRS Aperiodic SRS
- TDD elMTA PCel.l and TDD (elMTA black non-elMTA) SCel 1 are used as carrier aggregation techniques, and TDD elMTA PCell is a fallback mode (ie, SIBl upward).
- TDD elMTA PCell and TDD (elMTA or ⁇ -eIMTA) SCell are used as carrier aggregation techniques and the TDD elMTA PCell is operated in Non-Fa 11 back Mode. It can also be extended.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation scheme, and TDD elMTA PCell is used as fallback mode (ie, SIBl uplink-downlink configuration).
- TDD elMTA PCell is used as fallback mode (ie, SIBl uplink-downlink configuration).
- the validity of the triggering message related to A-SRS transmission on the FDD SCell may be determined based on at least one of the following rule 4-A to rule 4-F.
- Rule 4-A i) downlink HARQ reference configuration, ii) or uplink HARQ reference configuration of a TDD elMTA PCell (on FDD UL CC), iii) or SIB1 uplink-downlink Link setup iv) or uplink-referenced HARQ timeline, V) black or downlink-depending on whether or not to be performed at the same point as UL SF position, ⁇ and / or UpPTS position according to at least one of the reference HARQ timeline , Validation of the corresponding triggering message may be determined.
- i) downlink HARQ reference configuration of TDD elMTA PCell, ⁇ ) or uplink HARQ reference configuration, iii) or SIB1 uplink-downlink configuration iv) black uplink-reference HARQ timeline, V ) Or UL SF location according to at least one of the downlink-reference HARQ timelines, vi) and / black are the same A-SRS transmission (on FDD UL CC) should be performed at the same point as the UpPTS location, the terminal triggers the corresponding triggering The message can be determined to be Valid. On the other hand, if it is not the same point as the position according to the i) to vi), it can be determined that the triggering message is invalid (Invalid).
- Rule 4-B The corresponding A-SRS transmission (on FDD UL CC) is set to i) downlink HARQ reference configuration of the TDD elMTA PCell, ii) or uplink HARQ reference configuration, iii) black on SIB1 Downlink-downlink configuration IV) or uplink-reference HARQ timing line, V) or downlink-reference UL SF position according to at least one of the timeline, vi) and / or at the same point as the UpPTS position ( If A-SRS transmission (on FDD UL CC) should be performed, the UE determines that the corresponding triggering message is valid (Valid).
- the corresponding A-SRS transmission is i) downlink HARQ reference configuration of the TDD elMTA PCell of the TDD elMTA PCell, ii) or uplink HARQ reference configuration, iii) or SIB1 uplink-downlink configuration iv) Or UL-SF position according to at least one of the uplink-referenced HARQ timeline, V) or the downlink-referenced HARQ timeline, vi) and / or A (at the FDD UL CC) at a different point than the UpPTS position.
- the UE is only valid if the PUSCH transmission is scheduled at the same time (ie if the PUSCH and A-SRS should be transmitted simultaneously on one SF (on the FDD UL CC)). On the other hand, if the PUSCH transmission is not scheduled at the same time, it may be determined that the corresponding triggering message is invalid.
- Rule 4-C If a UE is scheduled for PUSCH transmission simultaneously on SF of FDD UL CC in which corresponding A-SRS transmission is to be performed (that is, PUSCH and A-SRS on one SF (on FDD UL CC)) Only when it is transmitted at start-up), it can be determined that the corresponding triggering message is valid. On the other hand, if the PUSCH transmission is not scheduled at the same time, it can be determined that the triggering message is invalid (Invalid).
- Rule 4-D The UE determines that the corresponding triggering message is always invalid (Invalid), and may not perform the A-SRS transmission operation in the FDD UL CC.
- Rule 4-E The UE determines that the corresponding triggering message is always valid (Valid), and may perform the A-SRS transmission operation in the FDD UL CC.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation technique
- TDD elMTA PCell is a non-fallback mode (ie, actual ( Actual)
- the corresponding A-SRS transmission (on the FDD UL CC) is: i) Actual uplink-downlink configuration, ⁇ ) or downlink MRQ reference configuration of the TDD elMTA PCell, iii) or Uplink HARQ reference configuration, iv) or SIB1 uplink-downlink configuration, v) or uplink-reference HARQ timeline, vi) black downlink-UL SF position according to reference HARQ timeline, vii) and / Or, if it should be performed at the same point as the UpPTS location, the terminal may determine that the corresponding triggering message is valid (Valid). However, if A-SRS transmission is to be performed at a point different from the positions according to the above i) to vii), it can be determined that the corresponding triggering message is invalid.
- the radio resource usage on a specific cell is dynamically changed (ie, elMTA Cell) according to a load state in a situation in which carrier aggregation (CA) is applied, and the terminal simultaneously transmits / transmits on the corresponding cells (Aggregated Cells).
- This section describes how to determine the validity of periodic SRS (P-SRS) transmission when the reception (Simultaneous TX and RX) operation is not performed.
- CA carrier aggregation technique
- a TDD elMTA PCell and a TDD (elMTA or Non-elMTA) SCell are used as a carrier aggregation scheme, and the TDD elMTA PCell is a fallback mode (ie, SIB1 uplink-downlink).
- Link setup or ii) TDD elMTA PCell and TDD (elMTA or N- ⁇ -eIMTA) SCell are used as carrier aggregation schemes, and even when the TDD elMTA PCell is operated in Non-Fa 11 back Mode. Can be used.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation technique, and TDD elMTA PCell is used as a fallback mode (Fallback Mod, ie, SIB1 uplink-downlink configuration).
- Fallback Mod ie, SIB1 uplink-downlink configuration.
- the validity of the P-SRS transmission on the FDD SCell can be determined based on the following rules 5-A to 5-F. First, in the case of cross carrier scheduling or self-scheduling, CCS will be described.
- Rule 5-A i) downlink HARQ reference configuration of the TDD elMTA PCell (on FDD UL CC), ii) black uplink HARQ reference configuration, iii) black SIB1 uplink -Downlink configuration, iv) black uplink-reference HARQ timeline, V) or downlink-UL SF location according to at least one of the reference HARQ timeline, vi) and / black must be performed at the same point as the UpPTS location According to whether or not, the validity (Validation) of the corresponding P-SRS transmission may be determined.
- Rule 5-B The corresponding P-SRS transmission (on the FDD UL CC) is set to i) downlink HARQ reference configuration of the TDD elMTA PCell, ii) or uplink HARQ reference configuration, iii) or SIB1 uplink_downlink.
- Link establishment, iv) or uplink-reference HARQ timeline, V) or downlink-reference HARQ timeline If it is to be performed at the same point as the UL SF position, vi) and / or UpPTS position according to at least one terminal,
- the P-SRS transmission may be valid (Valid).
- corresponding P-SRS transmission is i) downlink HARQ reference configuration of the TDD e-IMTA PCell, ii) black uplink HARQ reference configuration, iii) or SIB1 uplink-downlink configuration, iv) Or if the UL SF location according to at least one of the uplink-reference HARQ timeline, V) or the downlink-reference HARQ timeline, vi) and / or the UpPTS location is to be performed, the UE can only Only when scheduled at the same time (i.e.
- Rule 5-C UE transmits PUSCH and P— on one SF (on FDD UL CC) when PUSCH transmission is simultaneously scheduled on SF of FDD UL CC to which corresponding P-SRS transmission is to be performed Only when the SRS should be transmitted at the same time, it is determined that the corresponding P—SRS transmission is valid (Valid). On the other hand, if the PUSCH transmission is not scheduled at the same time, it is determined that the corresponding P-SRS transmission is invalid (Invalid).
- Rule 5-D The UE determines that the corresponding P-SRS transmission is always invalid (Invalid), and may not perform the P—SRS transmission operation in the FDD UL CC.
- Rule 167E The UE determines that the corresponding P-SRS transmission is always valid (Valid), and may not perform the P-SRS transmission operation in the FDD UL CC.
- TDD elMTA PCell and FDD SCell are used as a carrier aggregation technique, and TDD elMTA PCell is a non-fall back mode (ie, liquid).
- TDD elMTA PCell is a non-fall back mode (ie, liquid).
- Rule 5-F i) Actual uplink-downlink configuration of the TDD elMTA PCell (on FDD UL CC), ii) black downlink HARQ reference configuration, iii) Or uplink HARQ reference configuration, iv) black SIB1 uplink-downlink configuration, v) or uplink—reference HARQ timeline, vi) or downlink-UL SF position according to reference HARQ timeline, vii) and / Or if it is to be performed at the same point as the UpPTS location, the terminal may determine that the corresponding P-SRS transmission is valid (Valid). However, if the P-SRS is transmitted at a point different from the positions i) to vii), it may be determined that the corresponding P-SRS transmission is invalid (Invalid).
- the radio resource usage of at least one cell is dynamically changed according to the load state under the condition that the carrier aggregation technique (CA) is applied.
- CA carrier aggregation technique
- the transmission mode (TM) of at least one specific cell is designated as a predefined transmission mode
- the uplink-downlink configuration of at least one cell e.g., TDD elMTA Cell.
- UL-'DL Configuration In the case of (re) setting to a specific value, it can be set to be applied only in at least one case.
- the proposed method / embodiment / rule / set of the invention as described above also may be included as one of the implementations of the method of the present invention ", may be considered to be a kind of embodiment is obvious.
- the above-described proposal methods / embodiments / rules / settings may be independently implemented, some proposal methods / embodiments / rules / settings may be implemented in a combination or a merged form.
- the information on the proposed method / embodiment / rules / settings described above or information on whether the proposed method / embodiment / rules / settings are applied or not is a signal previously defined by the base station to the terminal. (E.g. physical layer black is higher layer signal).
- TDD Cell and FDD Cell are used as a carrier aggregation technique (CA) (eg, TDD (eIMTA / Non-eIMTA) PCell and FDD SCell or FDD PCell and TDD (eIMTA / Non)).
- CA carrier aggregation technique
- the proposed method / embodiment / rules / settings described above do not perform simultaneous transmit / receive (Simultaneous TX and RX) operations on the corresponding aggregated cells in a situation where a carrier aggregation technique (CA) is applied. It may be configured to be limitedly applied only when the use of a subframe on the primary cell (PCell) is preferred over those of the secondary CelKSCell.
- CA carrier aggregation technique
- the above-described proposed method / embodiment / rules / settings may not perform a simultaneous TX / RX operation on Aggregated Cells to which Carrier Aggregation (CA) is applied.
- Half Duplex terminal can be configured to be applied only limitedly.
- TDD uplink-downlink configuration eg, SIB1 uplink-downlink configuration (PCell), RadioResour ceConf i gCommonSCe 11 IE (SCell)
- PCell SIB1 uplink-downlink configuration
- SCell RadioResour ceConf i gCommonSCe 11 IE
- CA carrier aggregation technique
- the relay When the relay is included in the wireless communication system, communication is performed between the base station and the relay in the backhaul link, and communication is performed between the relay and the terminal in the access link. Therefore, the base station or the terminal illustrated in the figure may be replaced by a relay in accordance with the situation.
- a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120.
- Base station 110 includes a processor 112, a memory 114, and a radio frequency (RF) unit 116.
- Processor 112 may be configured to implement the procedures and / or methods proposed herein.
- the memory 114 is connected with the processor 112 and stores various information related to the operation of the processor 112.
- the RF unit 116 is connected with the processor 112 and transmits and / or receives a radio signal.
- Terminal 120 includes a processor 122, a memory 124, and an RF unit 126.
- Processor 122 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 124 is connected with the processor 122 and stores various information related to the operation of the processor 122.
- the F unit 126 is connected with the processor 122 and transmits and / or receives a radio signal.
- Base station 110 and / or terminal 120 may have a single antenna or multiple antennas.
- a specific operation described as performed by a base station may be performed by an upper node in some cases. That is, including the base station Obviously, various operations performed for communication with a terminal in a network composed of a plurality of network nodes may be performed by a base station or other network nodes other than the base station.
- a base station may be replaced by terms such as fixed station, Node B, eNodeB (eNB), access point, and the like.
- one embodiment of the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- one embodiment of the present invention may include one or more ASICs (appl icat ion speci f ic integrated circuits), DSPs (digi tal signal processors), DSPDs (digital signal processing devices), PLDs (rogrammable). logi c devices), FPGAs (ield programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
- an embodiment of the present invention may be implemented in the form of modules, procedures, functions, etc. that perform the functions or operations described above.
- Software code may be stored in a memory unit and driven by a processor.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
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Abstract
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Priority Applications (4)
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JP2016570754A JP6360202B2 (ja) | 2014-03-10 | 2015-03-10 | 無線リソースの用途変更を支援する無線通信システムにおける信号の有効性判断方法及びそのための装置 |
EP15762192.1A EP3119027A4 (en) | 2014-03-10 | 2015-03-10 | Method for determining validity of signal in wireless communication system supporting usage change of radio resource, and apparatus therefor |
CN201580013023.9A CN106105083B (zh) | 2014-03-10 | 2015-03-10 | 在支持无线电资源的使用变化的无线通信系统中确定信号有效性的方法及用于其的装置 |
US15/122,803 US10097335B2 (en) | 2014-03-10 | 2015-03-10 | Method for determining validity signal in wireless communication system supporting usage change of radio resource, and apparatus therefor |
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US201461950811P | 2014-03-10 | 2014-03-10 | |
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JP (1) | JP6360202B2 (ko) |
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US10700845B2 (en) | 2015-03-09 | 2020-06-30 | Comcast Cable Communications, Llc | Secondary cell deactivation in a wireless device and a base station |
US10327236B2 (en) | 2015-03-09 | 2019-06-18 | Comcast Cable Communications, Llc | Secondary cell in a wireless device and wireless network |
US11641255B2 (en) | 2015-04-05 | 2023-05-02 | Comcast Cable Communications, Llc | Uplink control information transmission in a wireless network |
US9877334B2 (en) * | 2015-04-05 | 2018-01-23 | Ofinno Technologies, Llc | Cell configuration in a wireless device and wireless network |
US10200177B2 (en) | 2015-06-12 | 2019-02-05 | Comcast Cable Communications, Llc | Scheduling request on a secondary cell of a wireless device |
US9894681B2 (en) | 2015-06-12 | 2018-02-13 | Ofinno Technologies, Llc | Uplink scheduling in a wireless device and wireless network |
US9948487B2 (en) | 2015-06-15 | 2018-04-17 | Ofinno Technologies, Llc | Uplink resource allocation in a wireless network |
US10547426B2 (en) * | 2016-03-14 | 2020-01-28 | Samsung Electronics Co., Ltd. | Transmission of sounding reference signals in communication systems with carrier aggregation |
US10756868B2 (en) * | 2016-07-01 | 2020-08-25 | Qualcomm Incorporated | Techniques for transmitting a physical uplink shared channel in an uplink pilot time slot |
US10686628B2 (en) * | 2016-11-14 | 2020-06-16 | Intel IP Corporation | Access point (AP), station (STA) and methods of channel sounding in accordance with contention based access |
KR20190104376A (ko) * | 2017-02-17 | 2019-09-09 | 엘지전자 주식회사 | 협대역 사물 인터넷을 지원하는 무선 통신 시스템에서 단말과 기지국 간 신호 송수신 방법 및 이를 지원하는 장치 |
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Publication number | Publication date |
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EP3119027A4 (en) | 2017-11-08 |
CN106105083A (zh) | 2016-11-09 |
CN106105083B (zh) | 2019-08-16 |
US10097335B2 (en) | 2018-10-09 |
JP6360202B2 (ja) | 2018-07-18 |
JP2017512448A (ja) | 2017-05-18 |
US20170111159A1 (en) | 2017-04-20 |
EP3119027A1 (en) | 2017-01-18 |
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