WO2015167287A1 - 무선 통신 시스템에서 단말 간 통신을 위한 신호를 송수신하는 방법 및 이를 위한 장치 - Google Patents
무선 통신 시스템에서 단말 간 통신을 위한 신호를 송수신하는 방법 및 이를 위한 장치 Download PDFInfo
- Publication number
- WO2015167287A1 WO2015167287A1 PCT/KR2015/004414 KR2015004414W WO2015167287A1 WO 2015167287 A1 WO2015167287 A1 WO 2015167287A1 KR 2015004414 W KR2015004414 W KR 2015004414W WO 2015167287 A1 WO2015167287 A1 WO 2015167287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frequency band
- signal
- transmission
- reception
- band
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 94
- 238000004891 communication Methods 0.000 title claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims description 128
- 230000002776 aggregation Effects 0.000 claims description 49
- 238000004220 aggregation Methods 0.000 claims description 49
- 230000008054 signal transmission Effects 0.000 claims description 17
- 210000004027 cell Anatomy 0.000 description 110
- 230000011664 signaling Effects 0.000 description 18
- 230000008569 process Effects 0.000 description 16
- 230000004044 response Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 6
- KRTSDMXIXPKRQR-AATRIKPKSA-N monocrotophos Chemical compound CNC(=O)\C=C(/C)OP(=O)(OC)OC KRTSDMXIXPKRQR-AATRIKPKSA-N 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 101100365003 Mus musculus Scel gene Proteins 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000013468 resource allocation Methods 0.000 description 3
- 241000760358 Enodes Species 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 101150087426 Gnal gene Proteins 0.000 description 1
- 101001041669 Oryctolagus cuniculus Corticostatin 1 Proteins 0.000 description 1
- 102100037205 Sal-like protein 2 Human genes 0.000 description 1
- 101710192308 Sal-like protein 2 Proteins 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 210000004457 myocytus nodalis Anatomy 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000009482 thermal adhesion granulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- CSRZQMIRAZTJOY-UHFFFAOYSA-N trimethylsilyl iodide Substances C[Si](C)(C)I CSRZQMIRAZTJOY-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
-
- 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
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
-
- 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
- H04L1/1607—Details of the supervisory signal
-
- 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
Definitions
- the present invention relates to a wireless communication system.
- the present invention relates to a method for transmitting and receiving a signal for communication between terminals in a wireless communication system, and an apparatus therefor.
- LTE 3rd Generat ion Partnership Project Long Term Evolut ion
- E-UMTS Evolved Universal Mobility Telecommuni- cation Systems
- UMTS Universal Mobility Telecommuni- cation Systems
- LTE Long Term Evolut ion
- an E-UMTS is located at an end of a user equipment (IE), a base station (eNode B), a network (E-UTRAN), and is connected to an external network (Access Gateway). AG).
- the 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 1.44, 3, 5, 10, 15, and 20Mhz to provide downlink or uplink transmission services to multiple terminals. Different cells may be configured to provide different bandwidths.
- the base station controls data transmission and reception for a plurality of terminals.
- the reporter station transmits downlink scheduling information to indicate the time / frequency domain, encoding, data size, and HARQ Hybrid Automat ic Repeat and reQuest (TLS) related data to the corresponding UE. Inform.
- DL downlink
- TLS Hybrid Automat ic Repeat and reQuest
- the base station transmits the uplink scheduling information to the terminal for uplink (UL) data, the time / frequency that can be used by the terminal It informs the area, encoding, data size, HARQ related information, and the like.
- An interface for transmitting user traffic or control traffic may be used between base stations.
- the core network (CN) may consist of an AG and a network node for user registration of the terminal.
- the AG manages the mobility of the UE in units of a tracking area (TA) composed of a plurality of cells.
- Wireless communication technology has been developed to LTE based on WCDMA, but the demands and expectations of users and operators are continuously increasing.
- new technological evolution is required to be competitive in the future. Reduced cost per bit, increased service availability, flexible use of frequency bands, simple structure and open interface, and adequate power consumption of the terminal are required.
- An object of the present invention is to provide a method and apparatus for transmitting and receiving signals for device-to-devi ce (D2D) communication in a wireless communication system supporting carrier aggregation (Career Aggregat ion) There is.
- D2D device-to-devi ce
- Career Aggregat ion carrier aggregation
- the present invention provides a method and apparatus for transmitting and receiving a signal for communication between terminals (Devke-to-Device, D2D) in a wireless communication system that supports carrier aggregation.
- a method in which a terminal transmits and receives a signal for communication between terminals determines whether transmission or reception of a D2D signal is possible in at least one frequency band. Doing; Transmitting information regarding the frequency band capability to the base station; And generating the D2D signal according to the information about the frequency band capability. Whether the transmission and reception of the D2D signal is possible may be determined based on whether carrier aggregation is applied in the at least one frequency band.
- a method for a base station transmitting and receiving a signal for communication between terminals comprising: receiving information on a frequency band capability from a terminal; In at least one frequency band based on the information on the frequency band capability Determining, by the terminal, whether transmission and reception of a D2D signal is possible; And scheduling the D2D signal for the at least one frequency band enhancement specific frequency band.
- a terminal for transmitting and receiving a signal for communication between terminals in a wireless communication system supporting carrier aggregation (Devi ce-to-Dev i ce, D2D) Transmission and reception modules for transmitting and receiving signals; And a processor, wherein the processor determines whether transmission and reception of a D2D signal is possible in at least one frequency band, transmits information on frequency band capability to a base station, and transmits the D2D according to the information on the frequency band capability. And generating a signal.
- whether or not the transmission and reception of the D2D signal is possible is determined based on whether carrier aggregation is applied in the at least one frequency band.
- a base station for transmitting and receiving a signal for communication between terminals in a wireless communication system supporting carrier aggregation is a frequency. Transmitting and receiving modules for receiving information on the band capability from the terminal; And determining whether the UE can transmit and receive a D2D signal in at least one frequency band based on the information on the frequency band capability, and schedule the D2D signal for a specific frequency band among the at least one frequency band. It characterized in that it comprises a processor.
- the information on the frequency band capability may include information indicating a frequency band in which carrier aggregation is supported.
- the frequency band in which the carrier aggregation is supported may be a frequency band in which the D2D signal can be transmitted and received.
- Supported Frequency Bands The frequency bands in which uplink carrier merging and downlink carrier merging are supported may be a frequency band capable of transmitting and receiving the D2D signal.
- the information on the frequency band includes information on an operation mode of transmitting and receiving the D2D signal, wherein the operation mode includes the D2D signal in the first frequency band and the signal in the second frequency band simultaneously. And at least one of a first operation mode indicating transmission or a second operation mode indicating transmission of the D2D signal in the first frequency band and the signal in the second frequency band at different times.
- information about the frequency band may be applied according to the second operation mode.
- D2D DEVICE-T (H) EVICE
- FIG. 1 shows an E-UMTS network structure as an example of a wireless communication system.
- FIG. 2 illustrates a control plane and a user plane structure of a radio interface protocol between a terminal and an E-UTRAN based on the 3GPP radio access network standard.
- 3 shows physical channels used in a 3GPP LTE system and a general signal transmission method using the same.
- FIG. 4 illustrates a structure of a radio frame used in an LTE system.
- FIG. 5 shows a resource grid for a downlink slot.
- FIG. 6 illustrates a structure of a downlink subframe.
- FIG. 7 shows a structure of an uplink subframe used in LTE.
- 8 is a diagram for explaining carrier aggregation.
- FIG. 10 shows the structure of a TAC MAC CE.
- FIG. 11 illustrates an example in which a plurality of cells having different frequency characteristics are merged.
- Figure 12 illustrates a communication system that can be applied to the present invention.
- FIG. 13 is a diagram illustrating a receiving circuit that can be applied to the present invention.
- FIG. 14 is a diagram for describing a method of transmitting / receiving a D2D signal in a terminal supporting multiple antennas according to an embodiment of the present invention.
- 15 is a block diagram of a transmitting and receiving apparatus that can be applied to the present invention.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC to FDMA single carrier frequency division
- CDMA may be implemented by radio technology such as UTM Jniversal Terrestrial Radio Access) or CDMA2000.
- TDMA may be implemented with a wireless technology such as Global System for Mobile Communications (GSM) / Gener a 1 Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile Communications
- GPRS Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- 0FDMA may be implemented by a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA).
- UTRA is part of UMTS Jniversal Mobile Telecommunications System.
- 3GPP (3rd Generation Partnershi Project) LTEClong term evolution (3GPP) is part of Evolved UMTS (EHJMTS) using EHITRA and employs 0FDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced is an evolution of 3GPP LTE.
- FIG. 2 is a diagram illustrating a control plane and a user plane structure of a radio interface protocol between a UE and an E-UTRAN based on the 3GPP radio access network standard.
- 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 to an upper layer by using a physical channel.
- the physical layer is The medium access control layer is connected through a transport channel. Data moves between the medium access control layer and the physical layer through the transport channel. Data moves between the physical layer between the transmitting side and the receiving side through the physical channel.
- the physical channel utilizes time and frequency as radio resources.
- the physical channel is modulated by an Orthogonal Frequency Division Multiple Access (OFDMA) scheme in the downlink and a single carrier frequency division multiple access (SC-FDMA) scheme in the uplink.
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA single carrier frequency division multiple access
- the medium access control (MAC) layer of the second layer provides a service to a radio link control (RLC) layer, which is a higher 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 is necessary for efficient transmission of IP packets such as IPv4 or IPv6 over a narrow bandwidth air interface. It performs header compression function to reduce control information.
- PDCP Packet Data Convergence Protocol
- the 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 connection with configuration, re-conf igurat ion, and release of radio bearers (RBs).
- RB means a service provided by the second layer for data transmission between the terminal and the network.
- the RRC layers of the UE and the network exchange RRC messages with each other. If there is an RRC connected (RRC Connected) between the UE and the RRC layer of the network, the UE is in an RRC connected mode, otherwise it is in an RRC idle mode.
- the non-access stratum (NAS) layer above the RRC layer performs functions such as session management and mobility management.
- One cell constituting the base station (e NB) is set to one of bandwidths such as 1.4, 3, 5, 10, 15, and 20Mhz to provide downlink or uplink transmission service to multiple terminals. Different cells can 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 user traffic or a control message. ).
- BCH broadcast channel
- PCH paging channel
- SCH downlink shared channel
- the downlink SCH It may be transmitted 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 (RAC) for transmitting an initial control message and an uplink SC for transmitting user traffic or control message. Shared Channel).
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Multicast Control Channel
- MTCH Multicast Traffic Channel
- 3 is a diagram for explaining a physical channel used in the 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 and synchronizes with the base station.
- 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 which has completed the initial cell search, selects a physical downlink control channel (PDSCH) according to the physical downlink control channel (PDCCH) and the physical downlink control channel information. Receive more detailed system information can be obtained.
- PDSCH physical downlink control channel
- PDCCH physical downlink control channel
- 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 answers a preamble through a physical downlink control channel and a corresponding physical downlink shared channel.
- PRACH physical random access channel
- the message may be received (S304).
- contention resolution procedures such as transmitting additional physical random access channels (S305) and receiving physical downlink control channels and corresponding physical downlink shared channels (S306) may be performed. have.
- the user equipment which has performed the above-described procedure is then subjected to a physical downlink control channel / physical downlink shared channel (S307) and a physical uplink shared channel (Physi cal Upl ink) as a general uplink / downlink signal transmission procedure.
- S307 physical downlink control channel / physical downlink shared channel
- PUCCH Physical uplink shared channel
- UCI uplink control information
- UCI includes HARQ ACK / NACK (Hybr id Automatic Repeat and reQuest Acknow 1 edgement / Negat i ve-ACK), Scheduling Request (SR), Channel State Informat ion (CS I), and the like.
- HARQ AC / NACK is simply referred to as HARQ-ACK or ACK / NACK (A / N).
- HARQ-AC includes at least one of positive ACK (simply ACK), negative ACK (NACK), DTX, and NACK / DTX boost.
- CSI includes a CQKChannel Quality Indicator), a PMKPrecoding Matixix Indicator), 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, the UCI can be aperiodically transmitted through the PUSCH according to a network request / instruction.
- FIG. 4 is a diagram illustrating a structure of a radio frame used in an LTE system.
- uplink / downlink data packet transmission is performed in units of subframes, and one subframe includes a plurality of OFDM symbols. It is defined as a time interval.
- the 3GPP LTE standard supports a type 1 radio frame structure applicable to FDD (Frequency Division Duplex) and a type 2 radio frame structure applicable to TDD (Time Division Duplex).
- a downlink radio frame includes 10 subframes, and one subframe is a time domain. consists of two slots in a domain).
- the time taken for one subframe to be transmitted is called a TTK transmission time 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 0FDM symbols in the time domain and includes a plurality of resource blocks (RBs) in the frequency domain.
- RBs resource blocks
- a resource block (RB) as a resource allocation unit may include a plurality of consecutive subcarriers in one slot.
- the number of OFDM symbols included in one slot may vary depending on the configuration (conf igurat ion) of Cyclic Pref ix (CP).
- CPs include extended CPs and normal CPs.
- the number of OFDM symbols included in one slot may be seven.
- the OFDM symbol is configured by an extended CP, since the length of one OFDM symbol is increased, the number of OFDM symbols included in one slot is smaller than that of the standard CP.
- the number of OFDM symbols included in one slot may be six.
- an extended CP may be used to further reduce intersymbol interference.
- one subframe includes 14 OFDM symbols.
- Three OFDM symbols may be allocated to a physical downl ink control channel (PDCCH) and the remaining OFDM symbols may be allocated to a PDSCHC physical downl ink shared channel (PDSCH).
- PDCCH physical downl ink control channel
- PDSCH physical downl ink shared channel
- Type 2 radio frames consist of two half frames, and each half frame includes two slots.
- DwPTS Down Ink Pi Lot Time Slot
- GP Guard Period
- DwPTS UpPTS Jpl 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 period for removing interference caused in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
- D denotes a downlink subframe
- U denotes an uplink subframe
- S denotes the special subframe.
- Table 2 also shows the 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.
- 5 illustrates a resource grid for a downlink slot.
- the downlink slot includes N «b OFDM symbols in the time domain and N resource blocks in the frequency domain. Since each resource block includes N subcarriers, the downlink slot includes N ⁇ N l? Subcarriers in the frequency domain. 8 shows that a downlink slot includes 70 FDM symbols and a resource block includes 12 subcarriers. Illustrative but not necessarily limited thereto. For example, the number of OFDM symbols included in the downlink slot may be modified according to the length of the cyclic prefix (CP).
- CP cyclic prefix
- Each element on a resource grid is called a resource element (RE), and one resource element is indicated by one OFDM symbol index and one subcarrier index.
- RE resource element
- the number N of resource blocks included in a downlink slot depends on a downlink transmission bandwidth set in a cell.
- FIG. 6 shows a structure of an uplink subframe that can be used in embodiments of the present invention.
- an uplink subframe may be divided into a control region and a data region in the frequency domain.
- the control region is allocated a PUCCH carrying uplink control information.
- the data area is allocated with a PUSCH carrying user data.
- the PUCCH signal and the PUSCH signal may be simultaneously transmitted by introducing a carrier aggregation technology.
- the PUCCH for one UE is allocated an RB pair in a subframe. RBs belonging to the RB pair occupy different subcarriers in each of the two slots. This RB pair allocated to the PUCCH is said to be frequency hopping at the slot boundary (slot boundary).
- Figure 7 shows the structure of a downlink subframe that can be used in embodiments of the present invention.
- up to three OFDM symbols from the OFDM symbol index 0 in the first slot of a subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which the PDSCH is allocated. data region).
- Examples of downlink control channels used in 3GPP LTE include PCFICH (Physical Control Format Indicator Channel), PDCCH, PHICH (Physical Hybr id-ARQ Indicator Channel).
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols (ie, the size of a control region) used for transmission of control channels in the subframe.
- the PHICH is a male answer channel for the uplink, and carries an Acknowledgment 1 edgement (ACK) / Negati-Acknow 1 edgement (NAC) signal for a HARBR (Hybr id Automatic Repeat Request).
- DCI control information transmitted through the PDCCH
- the downlink control information includes uplink resource allocation information, downlink resource allocation information, or an uplink transmission (Tx) power control command for a certain terminal group.
- a sal may be understood as a combination of downlink resources and uplink resources.
- the uplink resource is not an essential element, and thus, the cell may be composed of only the downlink resource or the downlink resource and the uplink resource.
- the Sal may be made of uplink resources alone.
- the downlink resource may be referred to as a downlink component carrier (DL CC) and the uplink resource may be referred to as an uplink component carrier (UL CC).
- DL CC and UL CC may be represented by a carrier frequency (carrier frequency), the carrier frequency means a center frequency (center frequency) in the cell.
- a cell may be classified into a primary cell (PCell) operating at a primary frequency and a secondary cell (SCell) operating at a secondary frequency.
- PCell and SCell may be collectively referred to as a serving cell.
- the terminal may perform an initial connection establishment (initial connection establishment) process, or the cell indicated in the connection reset process or handover process may be a PCell. That is, the PCell may be understood as a cell which is a control-related core in a carrier aggregation environment to be described later.
- the UE may receive and transmit a PUCCH in its PCell.
- the SCell is configurable after the Radio Resource Control (RRC) connection is established and can be used to provide additional radio resources.
- RRC Radio Resource Control
- the remaining serving cells except the PCell may be viewed as SCells.
- the UE which is in the RRC_C0NNECTED state but the carrier aggregation is not configured or does not support the carrier aggregation there is only one serving cell configured only with the PCell.
- the UE in the RRC_C0NNECTED state and the carrier aggregation is configured, one or more serving cells exist, and the entire serving cell includes the PCell and the entire SCell.
- the network may configure one or more SCells in addition to the PCell initially configured in the connection establishment process.
- Carrier aggregation was introduced to allow the use of wider bandwidth to meet the demand for higher high data rates.
- Carrier aggregation may be defined as two or more component carriers (CCs) having different carrier frequencies or aggregation of two or more cells.
- FIG. 8 (a) shows a subframe in case of using one (X) in the existing LTE system
- FIG. 8 (b) shows a subframe in case of carrier aggregation is used.
- b) shows, by way of example, that three CCs of 20 MHz are used to support a total bandwidth of 60 MHz, where each CC may be contiguous or non-contiguous.
- the terminal may simultaneously receive and monitor downlink data through a plurality of DL CCs.
- the linkage between each DL CC and the UL CC may be indicated by system information.
- the DL CC / UL CC link may be fixed in the system or configured semi-statically.
- a frequency band that a specific UE can monitor / receive may be limited to M ( ⁇ N) CCs.
- Various parameters for carrier aggregation may be set in a cell specific (cel l-speci f ic), a terminal group specific (UE group-speci f ic), or a terminal specific (UE- speci f ic) scheme.
- Cross-carrier scheduling means, for example, including all of downlink scheduling allocation information of another DL CC in one of a plurality of serving cells and a DL CC, or a plurality of serving cell certificates. This means that the UL region includes all uplink scheduling scheme information for a plurality of UL CCs linked with the DL CC.
- the CIF may or may not be included (for example, defined as 3 bit size) or not included (for example, defined as 0 bit size) in the DCI format transmitted through the PDCCH as described above. If included, it indicates that cross-carrier scheduling is applied. If cross carrier scheduling is not applied, the downlink scheduling assignment information is valid on the DL CC through which the current downlink scheduling assignment information is transmitted. The uplink scheduling grant is also valid for one UL CC linked with the DL CC through which the downlink scheduling assignment information is transmitted.
- the CIF When cross carrier scheduling is applied, the CIF indicates a CC related to downlink scheduling allocation information transmitted through a PDCCH in one DL CC. For example,
- DL CC B and DL CC C may be controlled through a PDCCH in a control region on DL CC A.
- Downlink allocation information that is, information on PDSCH resources is transmitted.
- the UE monitors the DL CC A to know the resource region and the corresponding CC of the PDSCH through the CIF.
- Whether CIF is included or not included in the PDCCH may be set semi-statically and may be activated UE-specifically by higher layer signaling.
- a PDCCH on a specific DL CC may allocate a PDSCH resource on the same DL CC and allocate a PUSCH resource on an UL CC linked to the specific DL CC.
- the same coding scheme, CCE-based resource mapping, DCI format, and the like as the existing PDCCH structure may be applied.
- a PDCCH on a specific DL CC may allocate PDSCH / PUSCH resource on one DL / UL CC indicated by CIF among a plurality of merged CCs.
- CIF may be additionally defined in the existing PDCCH DCI format, may be defined as a fixed 3-bit field, or the CIF position may be fixed regardless of the DCI format size.
- the same coding scheme, CCE-based resource mapping, DCI format, and the like as the existing PDCCH structure may be applied.
- the base station may allocate a DL CC set to monitor the PDCCH. Accordingly, the burden of blind decoding of the terminal can be reduced.
- the PDCCH monitoring CC set is a part of the total merged DL CCs, and the UE may perform detection / decoding of the PDCCH only in the corresponding CC set. That is, in order to schedule PDSCH / PUSCH for the UE, the base station may transmit the PDCCH only on the PDCCH monitoring CC set.
- the PDCCH monitoring DL CC set may be configured as UE-specific or UE group-specific or cell-specific. For example, when three DL CCs are merged as shown in the example of FIG.
- DL CC A may be set to the PDCCH monitoring DL CC.
- the PDCCH on each DL CC can only schedule PDSCH in DL CC A.
- the PDCCH on DL CC A can schedule not only DL CC A but also PDSCH on other DL CCs. can do.
- PDCCH may not be transmitted to DL CC B and DL CC C.
- the time it takes for a signal transmitted from a terminal to reach a base station may vary according to the position of the terminal in the radius cell of Sal, the mobility of the terminal, and the like. That is, when the base station does not control the uplink transmission timing for each terminal, there is a possibility of interference between the terminals during the communication between the terminal and the base station. This is an error rate at the base station Can be increased.
- the time taken for the signal transmitted from the terminal to the base station may be referred to as timing advance. Assuming that the terminal is located randomly within the sal, the timing advance of the terminal may vary depending on the position of the terminal.
- the timing advance of the terminal may be much longer.
- the timing advance may vary depending on the frequency band of the cell. Therefore, the base station may need to manage or adjust the transmission timing of the terminals in the cell in order to prevent interference between the terminals. As such, management or adjustment of the transmission timing performed by the base station may be referred to as timing advance or maintenance of timing alignment.
- Timing advance maintenance or timing alignment may be performed through a random access procedure as described above.
- the base station may receive a random access preamble from the terminal and calculate a timing advance value using the received random access preamble.
- the calculated timing advance value is transmitted to the terminal through a random access response, and the terminal may update the signal transmission timing based on the received timing advance value.
- the base station may receive an uplink reference signal (eg, SRS (Sounding Reference Si Gnal)) transmitted periodically or randomly from the terminal to calculate the timing advance, and the terminal transmits the signal based on the calculated timing advance value.
- the timing can be updated.
- the base station can measure the timing advance of the terminal through the random access preamble or the uplink reference signal and can inform the terminal of an adjustment value for timing alignment.
- the adjustment value for timing alignment may be referred to as a timing advance command (TAC).
- TAC may be handled by the MAC layer.
- TAT timing alignment timer
- the TAT value may be transmitted to the terminal through higher layer signaling (eg, RRC signaling).
- N ⁇ can be indicated by a timing advance command.
- T S represents the sampling time.
- the uplink transmission timing may be adjusted in units of multiples of 16T S.
- TAC is random It may be given as 11 bits in the connection answer and may indicate a value from 0 to 1282. 4 can be given as TA * 16. Alternatively, the TAC is 6 bits and may indicate a value of 0 to 63. In this case, N TA may be given as N TA, old + (TA-31) * 16.
- the timing advance command received in subframe n may be applied from subframe n + 6.
- Timing Advance Group (TAG: Timing Advace Group)
- serving cells when a plurality of serving cells are used in a terminal, there may be serving cells showing similar timing advance characteristics. For example, serving using similar frequency characteristics (eg, frequency band) or having similar propagation delay. The sals may have similar timing advance characteristics. Accordingly, in order to optimize signaling overhead due to adjustment of a plurality of uplink timing synchronizations, carrier cells having similar timing advance characteristics may be managed as a group. Such a group may be referred to as a Timing Advance Group (TAG). Serving cell (s) with similar timing advance characteristics may belong to one TAG and at least one serving cell (s) in the TAG should have uplink resources.
- TAG Timing Advance Group
- the base station may inform the terminal of the TAG allocation using the TAG identifier through higher layer signaling (eg, RRC signaling).
- Two or more TAGs may be configured for one terminal.
- the TAG identifier indicates 0, it may mean a TAG including PCel l.
- a TAG containing PCel l may be referred to as a primary TAG (p imary TAG, pTAG), and other TAG (s) other than pTAG may be referred to as a secondary TAG (secondary TAG, sTAG or secTAG).
- the secondary TAG identifier (sTAG ID) may be used to indicate the corresponding sTAG of SCel l. If the sTAG ID is not set for SCel l, SCel l may be configured as part of the pTAG.
- One TA may be commonly applied to all CCs belonging to one TA group.
- a medium access control (MAC) protocol data unit includes a MAC header, a MAC CEC control element, and at least one MAC data unit (SDU).
- the MAC header includes at least one subheader, and each subheader refers to a MAC CE and a MAC SDU.
- the subheader indicates the length and characteristics of MAC CE and MAC SDU.
- the MAC SDU is a block of data from an upper layer (eg, RLC layer or RRC layer) of the MAC layer, and the MAC CE is used to convey control information of the MAC layer, such as a buffer status report. Used.
- the MAC subheader includes the following fields.
- [99]-LCID Logical Channel ID field. It indicates what kind of MAC CE or which logical channel the MAC SDU is.
- the MAC subheader corresponding to the fixed-sized MAC CE does not include the F and L fields.
- TAC MAC CE shows a TAC MAC CE as a fixed size MAC CE.
- the TAC is used to control the amount of time adjustment to be applied by the terminal and is identified by the LCID of the MAC PDU subheader.
- MAC CE has a fixed size and consists of a single octet (Octet), as shown in FIG.
- [105]-TAC Temporal Advance Command (6 bit): Indicates a T A index value (0, 1, 2, ..., 63) used to control the total amount of timing adjustment values to be applied by the terminal. .
- An adjustment value for timing alignment may be transmitted through a timing advance command (TAC), but is a random access response (hereinafter referred to as RAR) for a random access preamble transmitted by the terminal for initial access. It may also be transmitted through).
- TAC timing advance command
- RAR random access response
- the UE may perform a random access procedure in the following case. [109]-The UE does not have a connection with the base station (RRC Connect ion), the initial connection
- the UE may randomly select one random access preamble from 3 ⁇ 4 sum of the random access preambles indicated by system information or a handover command and transmit the random access preamble.
- a physical ACH (PRACH) resource can be selected and transmitted.
- the base station After the UE transmits the random access preamble, the base station attempts to receive its random access response within the random access response reception window indicated by the system information or the handover command (S902).
- the random access voice answer information may be transmitted in the form of a MAC PDU, and the MAC PDU may be transmitted through a physical downl ink shared channel (PDSCH).
- PDSCH physical downl ink shared channel
- the UE monitors PDCCH (Physical Downl Ink Control CHannel). That is, the PDCCH includes information of the UE that should receive the PDSCH and the PDSCH.
- the frequency and time information of the radio resource, and the transmission format of the PDSCH is preferably included.
- the random access response includes a random access preamble identifier (ID; for example, a random access preamble identifier if ier), an uplink grant indicating an uplink radio resource (UL grant), and a temporary sal identifier (Temporary C-). RNTI) and Timing Advance Command (TAC).
- ID random access preamble identifier
- UL grant uplink radio resource
- Temporal C- temporary sal identifier
- RNTI Timing Advance Command
- the reason for the need for the random access (or random access) preamble discriminator in the random access response as described above is that since one random access response may include random access voice response information for one or more terminals, the uplink grant This is because it is necessary to inform the UE which the UL Grant, the temporary cell identifier and the TAC are valid. In this step, it is assumed that the UE selects a random access preamble identifier that matches the random access preamble selected by the UE. Through this, the UE may receive an UL grant, a temporary sal identifier (Temporary CR TI), a timing synchronization correction value, and the like.
- Temporal CR TI Temporal CR TI
- the terminal processes the information included in the random access answer. That is, the terminal applies the TAC and stores the temporary cell identifier.
- the data to be transmitted may be stored in the message 3 buffer in response to receiving a valid random access voice answer.
- the UE transmits data (ie, a third message) to the base station by using the received UL grant.
- the third message should include the identifier of the terminal.
- the base station cannot determine which terminals perform the random access procedure, because the terminal needs to be identified for future collision resolution.
- Two methods have been discussed as a method of including the identifier of the terminal.
- the UE if the UE already has a valid cell identifier assigned to the cell before the random access procedure, the UE transmits its cell identifier through an uplink transmission signal corresponding to the UL grant.
- the UE transmits its own unique identifier (eg, S-TMSI or random IC Random Id). In general, the unique identifier is longer than the cell identifier.
- the terminal transmits data for the UL approval, it starts a timer for contention resolution (hereinafter referred to as "CR timer").
- the terminal After the terminal transmits data including its identifier through the UL grant included in the random access answer, the terminal waits for an instruction of the base station to resolve the collision. That is, it attempts to receive the PDCCH to receive a specific message (S904). Two methods have been discussed in the method of receiving the PDCCH. As mentioned above, when the third message transmitted in response to the UL grant is transmitted using its cell identifier, Attempt to receive the PDCCH using its own cell identifier, and if the identifier is a unique identifier, attempt to receive the PDCCH using the temporary cell identifier included in the random access response.
- the terminal determines that the random access procedure has been normally performed, and terminates the random access procedure.
- the terminal determines that the random access procedure has been normally performed, and terminates the random access procedure.
- the terminal determines that the random access procedure is normally performed, and terminates the random access procedure.
- the operation in the non-competition-based random access procedure ends the random access procedure only by transmitting the first and second messages.
- the terminal before the terminal transmits the random access preamble to the base station as the first message, the terminal is allocated a random access preamble from the base station, transmits the allocated random access preamble as the first message to the base station, and random access from the base station.
- the random access procedure is terminated by receiving.
- a base station uses a PDCCH.
- PRACH can be triggered with a PDCCH command.
- the terminal then transmits a PRACH preamble to the base station.
- the PRACH preamble transmission for the UE to initially synchronize is a contention-based PRACH preamble transmission.
- the base station transmits a random access answer message to the terminal as a response to the received first message.
- the random access answer message includes the contents shown in Table 3 below including the TAC.
- Table 7 below shows information included in a random access response grant in 3GPP LTE TS 36.213. Table 3
- FIG. 11 illustrates an example in which a plurality of cells having different frequency characteristics are merged.
- a TACTiming Advance value applicable to one CC for example, P cell or P carrier
- a terminal merges a plurality of cells belonging to different frequency bands (ie, largely spaced on a frequency) or having different propagation ion delay characteristics or different coverages (aggregat ion) May be allowed.
- RRH remote radio head
- carriers may be merged between cells formed at different places (inter-site carrier aggregat ion).
- the RRH may be referred to as RRl Remote Radio Unit), and both the base station eNB and the UE (or RRU) may be collectively referred to as nodes or transmitting nodes.
- a terminal aggregates two cells (cell 1, cell 2), and cell 1 (or CC1) is a base station ( e NB) without RRH. ), And Sal 2 may be formed using RRH for limited coverage and the like.
- propagation delay (or reception timing at the eNB) of the UL signal transmitted through the cell 2 (or CC2) from the UE and propagation delay of the UL signal transmitted through the cell 1 (or eNB) Reception timing at) may be different due to terminal location and frequency characteristics.
- the plurality of cells have different propagation delay characteristics, it is inevitable to have a plurality of TAs.
- FIG. 11B illustrates a plurality of cells having different TAs.
- the terminal may aggregate two cells (eg, PCel l, SCel l) and transmit a UL signal (eg, PUSCH) by applying a different TA to each cell.
- a UL signal eg, PUSCH
- the terminal When the terminal receives a plurality of TAs, if the difference between the uplink transmission time of a specific cell (for example, PCel l) and the uplink transmission time of another cell is too large, the uplink signal transmission of the corresponding cell is restricted. Can be considered. For example, if a gap (Gap) at the time of transmission exceeds a specific threshold, a method of limiting uplink signal transmission of a corresponding cell may be considered.
- the specific threshold may be set as a higher signal or a value previously known to the terminal. Such an operation may be necessary, for example, when the timing of transmission of a signal transmitted by the terminal is greatly shifted to prevent a malfunction from occurring because the timing relationship between the base station and the terminal is not constant. have.
- the present invention proposes the following method.
- the TA difference between a plurality of cells for which the UE is to perform uplink transmission is greater than or equal to a threshold
- the TA difference between uplink signals actually dropped by always dropping uplink transmission of an arbitrary cell is always present. It can be adjusted to fall within the threshold.
- transmission of an uplink signal for a cell whose TA difference exceeds a threshold based on a specific cell may be dropped.
- the specific cell may be PCel l or PCel l group.
- the network may configure the specific cell through RRC signaling or the like.
- the operation of dropping uplink signal transmission may be an operation of not transmitting a signal configured to be transmitted in advance, or an operation of not expecting or ignoring a scheduling command such as a PUSCH for a corresponding cell when the TA difference exceeds a threshold.
- the UE adjusts and transmits an uplink transmission timing of an arbitrary cell to be within TA compared to a transmission timing with another cell.
- the transmission timing of an uplink signal for a cell whose TA difference exceeds a threshold based on a specific cell may be adjusted.
- the specific cell may be PCel l or PCel l “.
- the network may configure the specific cell through RRC signaling.
- the terminal When the terminal receives a TAC (TAC) in which a TA difference between a plurality of cells to perform uplink transmission is greater than or equal to a threshold value, the terminal ignores the corresponding TAC or the TA difference is within a threshold value. Only applies to one. In this case, the TA difference
- TAC TAC
- the specific cell may be a PCel l or a PCel l group.
- the network may configure the specific cell through higher layer signaling (eg, RRC signaling).
- the TA threshold may be set by the network through higher layer signaling (eg, RRC signaling).
- the cell may be a plurality of cell groups, more specifically, a cell group to which the same TAC is applied.
- the difference in TA is not only the difference in the TA value managed by the UE, but also the difference in TA value that the UE should apply to transmission in a specific subframe, the difference in value in the TAC received by the UE, or the transmission that the UE applies to transmission
- the timing can be a difference.
- the TA difference restriction method may not be applied.
- a wireless communication system as described above eg, a 3GPP LTE system or
- the communication between devices refers to communication between the electronic device and the electronic device as it is. Broadly, it means wired or wireless communication between electronic devices or communication between a device controlled by a person and a machine. Recently, however, it is generally referring to wireless communication between an electronic device and an electronic device performed without human involvement.
- 12 is a diagram for conceptually explaining D2D communication.
- 12 is an example of D2D communication and represents a device-to-device (D2D) or a terminal-to-terminal (UE—to-UE) communication method, and data exchange between terminals may be performed without passing through a base station.
- D2D device-to-device
- UE—to-UE terminal-to-terminal
- D2D communication has advantages such as less latency and less radio resources than conventional base station-oriented communication.
- the UE means a user terminal, but when a network equipment such as an eNB transmits or receives a signal according to a communication method between the UEs, it may also be regarded as a kind of UE.
- D2D communication is a method of supporting device-to-device (or device-to-device) communication without passing through a base station, but D2D communication is a method of an existing wireless communication system (eg, 3GPP LTE / LTE-A). Because it is performed by reusing resources, it should not cause interference or disturbance to existing wireless communication system. In the same context, it is also important to minimize interference received by D2D communication by a terminal, a base station, etc. operating in a conventional wireless communication system.
- 3GPP LTE / LTE-A 3GPP LTE / LTE-A
- a specific UE may assume a UL CC aggregation (car aggregat ion) situation in which a plurality of serving cells are configured for an uplink carrier.
- the UE in order to transmit and receive the D2D signal and the WAN signal, transmits and receives a WAN signal on one carrier (hereinafter referred to as CC1) at least at a specific time point and transmits and receives a D2D signal on another carrier (hereinafter referred to as CC2) at least at a specific point in time. It can work.
- a terminal capable of Carer aggregat ion constructs a plurality of transceiver circuits. For example, if the UE can perform DL reception by combining two different bands and setting one serving cell for each band, the UE generally establishes two reception circuits and One receiving circuit may be applied to each serving cell.
- the same principle can be applied to a CA that performs a plurality of UL transmissions. For example, if the UE can perform DL reception by combining two different bands and setting one CC for each band, the corresponding UE generally establishes two reception circuits and one for each CC of each band.
- the receiving circuit of can be applied.
- the band can be used interchangeably with the above-mentioned frequency band.
- CA is set in two or more bands.
- the principle described in the present invention is one of the case of an intra-band CA in which CA is set in the same band. It is obvious that this can also be applied to the case of non-CA, where only one cell is set in the band.
- an area of the frequency that each transceiver circuit can process may be limited to a part of the area.
- DL reception may not be possible in all bands available from a specific reception circuit, and DL reception may be operated only in some selective bands. This is to reduce the implementation cost by limiting the operating frequency range of the individual transceiver circuits.
- the eNB should be able to determine which area of the frequency band the UE can operate as a transceiver.
- the terminal may report a combination of bands that the terminal can support in the CA situation through a process of accessing the network.
- the UE may report a list of band combinations it can support.
- 13 is a diagram illustrating a reception path according to an embodiment of the present invention. Referring to FIG. 13, the reception circuit 1 may always receive band A while the reception circuit 2 may select from band B and band C increment. In this case, two combinations such as (band A, band B) and (band A, band C) may be reported as a list of bend combinations supported by the terminal.
- the UE when the UE reports two combinations, the UE is configured to perform DL reception from the two serving cells respectively configured for the band A and the band B at a specific time point or to the band A and the bend C at a specific time point, respectively. It means that it can be configured to perform DL reception from the set two serving cells.
- the eNB when the UE performs the D2D operation, the eNB should be able to determine in which band the D2D signal can be transmitted or received.
- the UE may report to the eNB about a band capable of transmitting or receiving a signal of the D2D.
- the eNB may identify a bend capable of D2D operation and may utilize the scheduling for the UE based on this.
- the circuit for transmitting and receiving the D2D signal may be effective to receive the existing DL signal or reuse the circuit for transmitting the UL signal.
- D2D transmission may be regarded as possible in the corresponding band combination.
- the D2D transmission circuit may be able to reuse the UL transmission circuit as it is. That is, since the D2D signal and the UL signal are transmitted in the same frequency band, no additional operation is necessary, but only depending on whether the type of the signal applied to the transmission circuit is a D2D operation or an UL operation. Therefore, when uplink carrier aggregation is possible for a specific band combination, a specific UE may perform a D2D transmission operation. In this case, although a band combination capable of D2D transmission may be signaled, D2D transmission or UL transmission may be performed on the band combination without additional signaling.
- the eNB may perform D2D in the band combination without additional signaling. It can be considered that transmission is possible. Alternatively, separate signaling may be received for the corresponding band combination capable of D2D transmission from the UE.
- the UE may be considered to be able to simultaneously transmit a D2D signal in band A and band B.
- the D2D transmission and the UL transmission may be multiplexed by the TDM scheme. That is, D2D transmission may be performed in some time domains of band B, and UL transmission may be performed in other partial time domains.
- the D2D reception operation must be performed in the UL resource, in the case of the FDD scheme in which the DL resource and the UL resource are separated on the frequency axis, a constant change is required in the reception circuit. This is because at least the circuit tuned to the DL frequency of a particular bend must be moved to the UL frequency. In general, however, since the DL and UL frequencies of the same bend are not very far apart, it is relatively easy to move the operating frequency of one receiver circuit from the DL frequency of a specific band to the UL frequency.
- the eNB may consider that the UE will also be able to receive D2D in the band combination. For example, if a combination of (band A, band B) is reported as a DL CC configurable combination (or DL CA capable combination), the UE may be considered to be able to simultaneously receive a D2D signal in band A and band B.
- one band eg band A
- the other band eg band B
- whether or not D2D reception is possible for a specific bend combination may be signaled as a separate signal.
- Whether the DL reception and the D2D reception can be multiplexed by the TDM scheme in one bend may vary depending on whether the operation of dynamically switching the corresponding reception circuit between the DL frequency and the UL frequency is possible. If you switch dynamically between each frequency If possible, DL reception and D2D reception may be multiplexed in a TDM scheme within one band. Alternatively, different D2D signals may be multiplexed by TDM. In this case, the UE may perform DL reception on some time resource regions of one band and D2D reception on some other time resource regions.
- Whether the operation of dynamically switching between the DL frequency and the UL frequency is possible or whether the TDM scheme may be used may be signaled separately. For example, for the combination of (Band A, B), whether the operation is possible in the band B or whether the TDM scheme can be used, and if possible, performing DL reception in the band A while performing some DL in the band B The reception is regarded as being able to perform D2D reception for some other time, but otherwise, if band A performs DL reception, band B can only continuously perform DL reception or only D2D reception continuously. Can be considered to be present.
- the UE has only DL reception in each band on a specific bend combination. It is possible to further signal whether it is possible or whether D2D reception is also possible.
- the combination of (band A, band B) may signal whether the use of D2D reception in bands A and B is possible. Specifically, if the availability of the D2D reception for the (Band A, Band B) combination is signaled as (enabled, not possible), this means that when the band A and the band B are combined, the band A is either DL received or D2D received. While it can be used as one, it can be interpreted that band B cannot perform D2D reception and only DL reception.
- the D2D related capability of the UE may be defined through existing supported band capabilities.
- an interpretation or definition of D2D related capability is proposed as follows.
- the D2D UE basically performs an operation of transmitting a signal at a specific time and receiving a signal at another specific time in the same band. Therefore, the fact that a specific UE is capable of D2D in a specific band may be limited to be defined only in a case where both D2D transmission and reception in the corresponding band are possible. This restriction allows certain UEs to The overall operation can be simplified by eliminating the case where only one D2D transmission and receipt certificate is available in the band. If such a restriction is applied, the band combination in which the UL CC is set and the band combination in which the DL CC is set are generally different from each other, and thus the final D2D capable band combination should be identified based on this.
- a method for identifying a combination of D2D capable bands capable of both D2D transmission and reception operations will be described.
- the operation combination may not be supported, in which case the fact that some operation combination is not possible may be reported separately to the eNB. This will be described later.
- Method 1-2 It is considered that D2D is possible in the intersection of a set of combinations capable of UL transmission and a set of combinations capable of receiving DL. That is, if UL transmission is possible in a specific band or band combination and DL reception is possible at the same time, the corresponding band black is considered to be capable of D2D in the band combination.
- band combinations band A, band In B
- this combination is included in the combination capable of UL transmission and also the combination capable of DL reception.
- Method 2 The combination of DL receivable possible D2D received, and the combination of the UL transmission can be determined as being the D2D transmission.
- D2D reception may be possible in a specific band, but UL transmission may not be possible, and the corresponding band may be used only for D2D reception.
- the UL CC may be the same band or an adjacent band.
- the interval between the UL CC for receiving the D2D and the UL CC for transmitting the signal may be a criterion for whether simultaneous transmission and reception are possible. For example, when the interval between the UL CC receiving the D2D and the UL CC transmitting the signal is smaller than a specific value, it may be determined that simultaneous transmission and reception is impossible.
- the interval between the UL CC receiving the D2D and the UL CC transmitting the signal is larger than a specific value, it may be determined that simultaneous transmission and reception are possible. In this case, the fact that some combination of operations is not possible can be reported separately to the eNB.
- Operation Mode 1 It is possible to simultaneously receive the D2D signal in the band B while transmitting the signal in the band A. This may be referred to as ful l dupl ex.
- Operation Mode 2 When transmitting a signal in band A, it is not possible to simultaneously receive a D2D signal in band B. However, signal transmission in band A and D2D reception in band B It may be set at the same time and may mean that reception in band B is possible only when there is no signal transmission in band A. This may be referred to as hal f dupl ex.
- the UE may add an indicator indicating which operation mode of the two interpretations corresponds to each band combination.
- the signal transmission and the D2D reception in the same band are regarded as almost impossible, and may operate to always apply operation mode 2 without a separate indicator.
- operation mode 1 is not possible for a very close band, so it is fixed to operation mode 2, or the D2D UE specifies to always apply interpretation 1 for at least combinations that it reports as possible so that only operation mode 2 is possible. May not be reported as a D2D capable combination. According to such an operation, the overall operation may be simplified.
- the signal transmission and the D2D reception in the same bend apply the operation mode 2, but the operation mode 1 may be automatically assigned to the combination of different bands supported by the UE.
- the UE can receive DL signals using all receive antennas, so that the maximum rank of the DL signals is N do.
- K antennas which are part of the N reception antennas, can be switched to use for D2D signal reception, thereby enabling simultaneous reception of the DL signal and the D2D signal. It can be done.
- K receive antennas are excluded from DL signal reception, when the D2D signal is set at the same time as the DL signal, the maximum tank of the DL signal becomes N- [(.
- 14 is an embodiment of the present invention, in a terminal supporting multiple antennas.
- a diagram for describing a method of transmitting and receiving a D2D signal Specifically, a case in which some of the receiving antennas are set for receiving the D2D signal is shown.
- the maximum tank of the DL signal is 4 when there is no D2D in the presence of a total of four receiving antennas. In the situation where D2D is set, the maximum number of DL signals becomes 2 by switching two antennas for D2D use.
- the DL signal is set not to receive the DL signal, it is also possible to operate to use all the receiving antennas exclusively for D2D.
- the case in which the DL signal is set not to receive the DL signal may correspond to, for example, a case in which the DL serving cell is not set in the bends that can be processed by the four antennas shown in FIG. 14 and the reception circuit associated therewith.
- the UE may first report a maximum DL tank for a given band or band combination when D2D is not set.
- the maximum DL tank is referred to.
- D2D when reporting the maximum DL tank on each band, it may be reported to the eNB whether D2D is set or D2D is not set. Alternatively, when D2D is set, it may be noticed that D2D is set together with the maximum tank. On the other hand, the maximum tank may be reported using different parameters for each case.
- the UE may also report a maximum D2D tank value supported by the D2D link.
- the eNB may inform the UE of the maximum D2D tank value of the specific UE to transmit the D2D signal to the corresponding UE, so that the eNB may utilize the D2D signal transmission of the UE.
- the D2D signal may be directly transmitted to another UE. In this case, as described above, it operates to transmit the maximum possible D2D tank value in a corresponding situation according to whether the DL is received.
- the D2D reception of the UE may be performed only at some time, and in the case where the above report is transmitted uplink, the eNB is the maximum corresponding to the case where the UE is still not configured with D2D at the time when no actual D2D is performed. It can be interpreted as supporting a tank. Alternatively, to avoid the complicated operation of dynamically converting some antennas between the DL carrier and the UL CC, once the D2D is configured, even if no D2D is performed at a specific time point, the maximum DL tank is the same as when the D2D is performed. It can also be interpreted.
- the maximum DL tank may be separately reported depending on whether each band uses an FDD cell or a TDD cell. have. According to the above-described operation, the maximum DL rank in a specific band may eventually vary depending on whether D2D is configured.
- a TDD cell is configured in a specific band and D2D is configured in the same band, it is possible to operate such that there is no change in the maximum DL tank. This is because the DL resource and the UL resource appear in the same frequency carrier in the case of TDD, and even though the receiving circuit is fixed to the carrier, the UE can receive both the DL signal and the D2D signal separated in time units.
- the same band may be additionally limited to carriers having the same amplification frequency.
- the above-described report of the UE may generate an exception when the TDD cell is configured in a specific band and D2D is configured in the same band.
- the maximum DL tank may not be reported separately.
- the same band may be additionally limited to carriers having the same amplification frequency.
- the maximum tank may be changed to reflect the change according to the difference in modulation method between the DL signal and the D2D signal.
- each band The maximum DL rank may be reported separately according to whether the UE uses the FDD cell or the TDD cell.
- the reception operation of the corresponding D2D may reuse the existing DL receiving circuit as described above. However, it can be operated by building a separate D2D circuit.
- the UE may operate according to the capability available for D2D reception,
- Additional information regarding the capability of the UE may be further provided, for example, information such as maximum bandwidth or maximum transmission rate.
- the additional information may be omitted, and a rule may be applied to consider the same value as possible when receiving DL in the same band.
- the maximum data rate that can be received by the UE can receive D2D from a plurality of UEs in one subframe in the case of D2D, and thus the UE can process the specific subframe instead of a single UE. It can be interpreted in the form of an agreement of the transmission rate of the entire D2D transmitting UE. For example, if a particular UE can support 100 Mbps data rate in D2D reception, this means that two UEs transmit 50 Mbps each while simultaneously receiving 100 Mbps transmission of a single UE in one subframe. It means that the subframe can be received, and that 50 UEs can receive 2 Mbps each in one subframe.
- the maximum data rate may be converted into the number of bits of the maximum transport block.
- the UE may determine the maximum number of transport block bits that can be transmitted or received per subframe or during one Transmit Time Interval (TTI).
- TTI Transmit Time Interval
- the maximum number of transport block bits is not the number of bits of transport blocks that can be received by a single UE, but the sum of the number of transport block bits of the entire D2D transmitting UE that the UE can process in a specific subframe or 1 ⁇ . It can be interpreted in the form.
- the maximum number of transport block bits that a particular UE can receive is 10000, this means that the number of transport block bits that can be received from a single UE is 10000, and that the total number of transport block bits that can be received from five UEs is 10000. it means.
- the UE When a signal is transmitted from one or more transmitting UEs, the UE may operate limitedly according to the capability of the receiving UE. According to the capability of the UE, the number of D2D processes or the number of transmitting UEs that the UE can perform D2D operation may be set. In order to perform a D2D operation, when a specific UE operates according to one transmitting UE and one process, the number of D2D processes corresponds to the number of UEs that can transmit to the specific UE.
- the receiving UE may report information related to the maximum bandwidth or the maximum transmission rate possible for D2D reception in relation to the capability of the UE.
- a report may indicate a maximum transmission rate or a maximum bandwidth, but in some cases, may include information about the number of operations that the UE can perform with respect to the maximum transmission rate or the maximum bandwidth.
- the UE may include information on how many UEs can receive D2D signals.
- it may include information about the number of D2D processes that the UE can support.
- the number of D2D processes may be interpreted as the sum of the number of D2D processes for the entire D2D transmitting UE, not the number of processes for a single UE.
- the eNB may adjust the transmission rate of the individual UE and the number of UEs simultaneously transmitting to the corresponding UE based on the report.
- the base station or the terminal may be replaced with a relay.
- a wireless communication system includes a base station (BS) 110 and a terminal (UE).
- BS base station
- UE terminal
- Base station 110 includes a processor 112, a memory 114, and a radio frequency (RF) unit 116.
- the processor 112 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 114 is connected with the processor 112 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.
- the terminal 120 includes a processor 122, a memory 124, and an RF unit 126.
- the 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 RF unit 126 is connected with the processor 122 and transmits and / or receives a radio signal.
- the base station 110 and / or the terminal 120 may have a single antenna or multiple antennas.
- a base station may, in some cases, be performed by an upper node thereof. That is, it is apparent that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
- a base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.
- the terminal may be replaced with terms such as UECUser Equipment (MSC), Mobile Station (MS), and MSSCMobile Subscriber Station (MSC).
- an embodiment of the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention may include one or more ASICs (capacitor specific integrated circuits), digital signal processors (DSPs), digital signal processing devices (DSPs), programmable logic devices (PLDs), FPGAs can be implemented by programmable logic gates, processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs capacitor specific integrated circuits
- DSPs digital signal processors
- DSPs digital signal processing devices
- PLDs programmable logic devices
- FPGAs can be implemented by programmable logic gates, 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.
- the 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.
- the present invention can be used in a wireless communication device such as a terminal, a relay, a base station, and the like.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580022964.9A CN106256160B (zh) | 2014-04-30 | 2015-04-30 | 在无线通信系统中发送和接收设备到设备通信的信号的方法及其装置 |
US15/307,761 US10390345B2 (en) | 2014-04-30 | 2015-04-30 | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
EP21180937.1A EP3905822A1 (en) | 2014-04-30 | 2015-04-30 | Method for transmitting and receiving signal for device-to-device communication l in wireless communication system and apparatus for same |
JP2016563447A JP6549153B2 (ja) | 2014-04-30 | 2015-04-30 | 無線通信システムで端末間の通信のための信号を送受信する方法及び装置 |
KR1020167027788A KR102345348B1 (ko) | 2014-04-30 | 2015-04-30 | 무선 통신 시스템에서 단말 간 통신을 위한 신호를 송수신하는 방법 및 이를 위한 장치 |
EP15786806.8A EP3139687A4 (en) | 2014-04-30 | 2015-04-30 | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
US16/510,729 US11082979B2 (en) | 2014-04-30 | 2019-07-12 | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201461986843P | 2014-04-30 | 2014-04-30 | |
US61/986,843 | 2014-04-30 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/307,761 A-371-Of-International US10390345B2 (en) | 2014-04-30 | 2015-04-30 | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
US16/510,729 Continuation US11082979B2 (en) | 2014-04-30 | 2019-07-12 | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015167287A1 true WO2015167287A1 (ko) | 2015-11-05 |
Family
ID=54358924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2015/004414 WO2015167287A1 (ko) | 2014-04-30 | 2015-04-30 | 무선 통신 시스템에서 단말 간 통신을 위한 신호를 송수신하는 방법 및 이를 위한 장치 |
Country Status (6)
Country | Link |
---|---|
US (2) | US10390345B2 (ko) |
EP (2) | EP3905822A1 (ko) |
JP (1) | JP6549153B2 (ko) |
KR (1) | KR102345348B1 (ko) |
CN (1) | CN106256160B (ko) |
WO (1) | WO2015167287A1 (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019512900A (ja) * | 2016-03-28 | 2019-05-16 | グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッドGuangdong Oppo Mobile Telecommunications Corp., Ltd. | デバイスツーデバイス通信方法、端末デバイス及びネットワークデバイス |
US10390345B2 (en) | 2014-04-30 | 2019-08-20 | Lg Electronics Inc. | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3175657B1 (en) * | 2014-08-01 | 2019-02-27 | Sun Patent Trust | Transmission timing control for d2d communication |
WO2017005295A1 (en) * | 2015-07-06 | 2017-01-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Resource allocation for data transmission in wireless systems |
WO2017026414A1 (ja) * | 2015-08-07 | 2017-02-16 | シャープ株式会社 | 端末装置、基地局装置、通信システム、測定方法および集積回路 |
JP6236098B2 (ja) * | 2016-02-15 | 2017-11-22 | 株式会社Nttドコモ | ユーザ装置、基地局及び通信方法 |
US10477552B2 (en) | 2017-02-13 | 2019-11-12 | Qualcomm Incorporated | Techniques for handling wide bandwidth communications |
EP3602936B1 (en) * | 2017-03-24 | 2021-09-01 | Motorola Mobility LLC | Method and apparatus for receiving downlink data transmissions |
KR102434225B1 (ko) * | 2017-06-16 | 2022-08-19 | 삼성전자 주식회사 | 차세대 이동 통신 시스템에서 안테나빔별 망혼잡을 제어하는 방법 및 장치 |
CN109121222B (zh) * | 2017-06-23 | 2021-08-13 | 华为技术有限公司 | 通信方法和通信设备 |
CN109379171A (zh) | 2017-08-10 | 2019-02-22 | 索尼公司 | 用于无线通信的电子设备和方法、存储介质 |
WO2019190537A1 (en) * | 2018-03-29 | 2019-10-03 | Intel IP Corporation | Methods and apparatus to facilitate configurable multi-channel communications in intelligent transportation systems for vehicular communications |
US10432240B1 (en) | 2018-05-22 | 2019-10-01 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating power amplifier noise |
US10763905B1 (en) | 2019-06-07 | 2020-09-01 | Micron Technology, Inc. | Wireless devices and systems including examples of mismatch correction scheme |
CN114391291A (zh) * | 2019-10-17 | 2022-04-22 | 华为技术有限公司 | 通信方法和通信装置 |
US10972139B1 (en) | 2020-04-15 | 2021-04-06 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating power amplifier noise with neural networks or recurrent neural networks |
US11496341B2 (en) | 2020-08-13 | 2022-11-08 | Micron Technology, Inc. | Wireless devices and systems including examples of compensating I/Q imbalance with neural networks or recurrent neural networks |
WO2023055883A1 (en) * | 2021-09-30 | 2023-04-06 | Kyocera Corporation | Group random access |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013088398A1 (en) * | 2011-12-16 | 2013-06-20 | Renesas Mobile Corporation | Device to Device Communication |
WO2013109100A1 (ko) * | 2012-01-18 | 2013-07-25 | 엘지전자 주식회사 | 장치 대 장치 통신 방법 및 이를 수행하기 위한 장치 |
WO2013162345A1 (ko) * | 2012-04-27 | 2013-10-31 | 엘지전자 주식회사 | 무선 통신 시스템에서 장치-대-장치 통신을 수행하는 방법 및 장치 |
WO2013171115A1 (en) * | 2012-05-15 | 2013-11-21 | Telefonaktiebolaget L M Ericsson (Publ) | Beacon management for network assisted device-to-device (d2d) communication |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9516686B2 (en) * | 2010-03-17 | 2016-12-06 | Qualcomm Incorporated | Method and apparatus for establishing and maintaining peer-to-peer (P2P) communication on unlicensed spectrum |
US8811359B2 (en) * | 2010-04-15 | 2014-08-19 | Qualcomm Incorporated | Multiplexing of peer-to-peer (P2P) communication and wide area network (WAN) communication |
WO2012108621A1 (ko) * | 2011-02-11 | 2012-08-16 | 엘지전자 주식회사 | 무선 접속 시스템에서 단말 간 협력적 통신을 수행하기 위한 방법 및 장치 |
US9408212B2 (en) * | 2011-11-10 | 2016-08-02 | Nokia Technologies Oy | Methods and apparatuses for facilitating use of carrier aggregation for device-to-device communications |
WO2013120267A1 (en) | 2012-02-17 | 2013-08-22 | Renesas Mobile Corporation | Control of device-to-device communication |
US20130322370A1 (en) * | 2012-06-01 | 2013-12-05 | Qualcomm Incorporated | Signaling reduced user equipment performance in wireless communication systems |
US9648623B2 (en) * | 2012-06-24 | 2017-05-09 | Lg Electronics Inc. | Method and device for performing direct communication between terminals in wireless communication system |
JP6031610B2 (ja) * | 2012-08-23 | 2016-11-24 | インターデイジタル パテント ホールディングス インコーポレイテッド | デバイスツーデバイス発見を行うための方法および装置 |
US8923880B2 (en) * | 2012-09-28 | 2014-12-30 | Intel Corporation | Selective joinder of user equipment with wireless cell |
CN103068049B (zh) | 2012-12-11 | 2015-06-24 | 北京邮电大学 | 蜂窝与d2d混合网络中避免蜂窝通信对d2d通信干扰的方法 |
US9185697B2 (en) * | 2012-12-27 | 2015-11-10 | Google Technology Holdings LLC | Method and apparatus for device-to-device communication |
JP6187921B2 (ja) * | 2013-08-06 | 2017-08-30 | シャープ株式会社 | 端末装置、基地局装置、方法および集積回路 |
US9584291B2 (en) * | 2013-09-24 | 2017-02-28 | Qualcomm Incorporated | Control signaling for enabling two-hop orthogonalization for device-to-device broadcasts |
KR102116557B1 (ko) * | 2014-02-12 | 2020-05-28 | 한국전자통신연구원 | 단말간 직접 통신이 가능한 단말기 그리고 그것의 간섭 제거 방법 |
EP3471487B1 (en) * | 2014-03-21 | 2020-12-23 | Sun Patent Trust | Apparatus and method for transmitting a buffer status report |
KR101745292B1 (ko) | 2014-03-28 | 2017-06-08 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말에 의해 수행되는 d2d(device-to-device) 동작 방법 및 상기 방법을 이용하는 단말 |
WO2015167207A1 (ko) * | 2014-04-29 | 2015-11-05 | 엘지전자 주식회사 | 반송파 집성을 지원하는 무선 통신 시스템에서 D2D(Device-to-Device) 신호 수신 방법 및 이를 위한 장치 |
CN106256160B (zh) | 2014-04-30 | 2019-12-24 | Lg电子株式会社 | 在无线通信系统中发送和接收设备到设备通信的信号的方法及其装置 |
-
2015
- 2015-04-30 CN CN201580022964.9A patent/CN106256160B/zh not_active Expired - Fee Related
- 2015-04-30 JP JP2016563447A patent/JP6549153B2/ja active Active
- 2015-04-30 US US15/307,761 patent/US10390345B2/en active Active
- 2015-04-30 EP EP21180937.1A patent/EP3905822A1/en not_active Withdrawn
- 2015-04-30 KR KR1020167027788A patent/KR102345348B1/ko active IP Right Grant
- 2015-04-30 EP EP15786806.8A patent/EP3139687A4/en not_active Withdrawn
- 2015-04-30 WO PCT/KR2015/004414 patent/WO2015167287A1/ko active Application Filing
-
2019
- 2019-07-12 US US16/510,729 patent/US11082979B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013088398A1 (en) * | 2011-12-16 | 2013-06-20 | Renesas Mobile Corporation | Device to Device Communication |
WO2013109100A1 (ko) * | 2012-01-18 | 2013-07-25 | 엘지전자 주식회사 | 장치 대 장치 통신 방법 및 이를 수행하기 위한 장치 |
WO2013162345A1 (ko) * | 2012-04-27 | 2013-10-31 | 엘지전자 주식회사 | 무선 통신 시스템에서 장치-대-장치 통신을 수행하는 방법 및 장치 |
WO2013171115A1 (en) * | 2012-05-15 | 2013-11-21 | Telefonaktiebolaget L M Ericsson (Publ) | Beacon management for network assisted device-to-device (d2d) communication |
Non-Patent Citations (2)
Title |
---|
ERICSSON ET AL.: "WF on D2D Multicarrier UE capabilities Assumptions", RL-141752, 3GPP TSG RAN WG1 MEETING #76BIS, 3 April 2014 (2014-04-03), Shenzhen, China, XP050787416, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran[\VG1_RLI/TSGR1_76b/Docs> * |
See also references of EP3139687A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10390345B2 (en) | 2014-04-30 | 2019-08-20 | Lg Electronics Inc. | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
US11082979B2 (en) | 2014-04-30 | 2021-08-03 | Lg Electronics Inc. | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same |
JP2019512900A (ja) * | 2016-03-28 | 2019-05-16 | グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッドGuangdong Oppo Mobile Telecommunications Corp., Ltd. | デバイスツーデバイス通信方法、端末デバイス及びネットワークデバイス |
US10887933B2 (en) | 2016-03-28 | 2021-01-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Device-to-device communication method, terminal device, and network device |
Also Published As
Publication number | Publication date |
---|---|
US11082979B2 (en) | 2021-08-03 |
KR102345348B1 (ko) | 2021-12-30 |
EP3139687A4 (en) | 2017-12-06 |
US10390345B2 (en) | 2019-08-20 |
US20170055264A1 (en) | 2017-02-23 |
US20190342892A1 (en) | 2019-11-07 |
KR20170002379A (ko) | 2017-01-06 |
CN106256160B (zh) | 2019-12-24 |
EP3139687A1 (en) | 2017-03-08 |
EP3905822A1 (en) | 2021-11-03 |
JP2017521880A (ja) | 2017-08-03 |
JP6549153B2 (ja) | 2019-07-24 |
CN106256160A (zh) | 2016-12-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11082979B2 (en) | Method for transmitting and receiving signal for device-to-device communication in wireless communication system and apparatus for same | |
KR102355627B1 (ko) | 단말 간 통신을 지원하는 무선 통신 시스템에서 신호를 송수신하는 방법 및 이를 위한 장치 | |
US9357536B2 (en) | Method and apparatus of controlling cell deactivation in a wireless communication system | |
KR102396041B1 (ko) | 무선 통신 시스템에서 단말 간 직접 통신을 위한 동기화 신호를 전송하는 방법 및 이를 위한 장치 | |
EP2487970B1 (en) | Method, system and device for uplink synchronization | |
KR102369590B1 (ko) | 무선 통신 시스템에서 단말 간 신호를 송신하는 방법 및 이를 위한 장치 | |
EP3206446B1 (en) | Method for transmitting synchronization signal for device-to-device communication in wireless communication system and apparatus therefor | |
US10756937B2 (en) | Method for configuring reference signal for V2V communication in wireless communication system, and apparatus therefor | |
JP2017512041A (ja) | 無線通信システムにおけるデータ送信方法及び装置 | |
US9386579B2 (en) | Method and apparatus of controlling cell activation in a wireless communication system | |
WO2013028018A2 (ko) | 무선 접속 시스템에서 동기 신호 송수신 방법 이를 위한 장치 | |
JP6388963B2 (ja) | 無線通信システムにおいてD2D(Device−to−Device)信号送信方法及びそのための装置 | |
WO2013066098A1 (ko) | 무선 접속 시스템에서 확장 캐리어를 이용한 데이터 수신 방법 및 장치 |
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: 15786806 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20167027788 Country of ref document: KR Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2015786806 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2015786806 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2016563447 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15307761 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |