WO2015167207A1 - 반송파 집성을 지원하는 무선 통신 시스템에서 D2D(Device-to-Device) 신호 수신 방법 및 이를 위한 장치 - Google Patents
반송파 집성을 지원하는 무선 통신 시스템에서 D2D(Device-to-Device) 신호 수신 방법 및 이를 위한 장치 Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
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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
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- 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
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
Definitions
- D2D device-to-device
- the present invention relates to a wireless communication system, and more particularly, to a method for receiving a device-to-device (D2D) signal and a device therefor in a wireless communication system supporting carrier aggregation.
- D2D device-to-device
- a 3GPP LTE (3rd Generation Partnership Project Long Term Evolution (LTE)) communication system will be described.
- E-UMTS Evolved Universal Mobile Telecommunications System
- E-UMTS UMTSCUniversal Mobile Telecommunications System
- 3GPP 3rd Generation Partnership Project
- 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.
- 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 20 MHz to provide a downlink or uplink transmission service 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.
- For downlink (DL) data the base station transmits downlink scheduling information to the corresponding terminal. It informs the time / frequency domain, data, data size, and HARQ (Hybr id Auto repeat Repeat and reQuest) related information.
- DL downlink
- HARQ Hybr id Auto repeat Repeat and reQuest
- the base station transmits uplink scheduling information to the terminal for uplink (Upl ink, UL) data and informs the user of the time / frequency domain, encoding, data size, and HARQ related information that can be used by the terminal.
- An interface for transmitting user traffic or control traffic may be used between base stations.
- the core network (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 TA Tracking Area 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 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. Detailed description of the invention
- a method of receiving a device-to-device (D2D) signal of a terminal may be performed on a specific subframe in which a wide area network (WAN) signal is received on a downlink cell of a frequency division duplex band (FDD). And receiving a D2D signal on an uplink cell of the FDD band according to transmission and reception of a WAN signal of the TDD band, wherein the D2D signal is a transmission signal of the WAN by the TDD band.
- the reception circuit (RX chain) for the TDD band is characterized in that it is received when the reset for the uplink (Uplink) cell of the FDD band.
- the D2D signal is not received when the TDD band receives a WAN signal and a reception circuit (RX chain) for the TDD band is used for receiving a downlink signal of the TDD band. It can be characterized.
- the terminal may be configured to perform only one of a WAN signal reception operation or a D2D signal reception operation on the FDD band.
- the method may further include signaling to a base station whether a reception circuit (RX chain) for the TDD band can be reconfigured for reception of a D2D signal on an uplink cell of the FDD band. Can be.
- RX chain reception circuit
- the method may further include reporting information on at least one cell to a base station, in which a reception circuit (RX chain) for the TDD band may be reset to receive the D2D signal.
- RX chain reception circuit
- the specific subframe may be an uplink subframe on a downlink HARQ reference configuration for an elMTA-TDD cell (enhanced interference management for traffic adaption-enabled TDD cell). can do.
- the TDD band includes a primary cell (PCell) and a secondary cell (SCell), wherein the specific subframe includes both the primary cell and the secondary cell. It may be characterized in that it is a subframe of the time point used as an uplink subframe.
- the FDD band may be set to an FDD primary cell, and the TDD band may be set to a TDD secondary cell.
- the TDD band may be set to a TDD primary cell
- the FDD band may be set to an FDD secondary cell
- a terminal for receiving a device-to-device (D2D) signal includes: a radio frequency unit (Radio Frequency Unit); And a processor, wherein the processor includes: a TDD band on a specific subframe in which a wide area network (WAN) signal is received on a downlink cell of the frequency division duplex band (FDD); Is configured to receive a D2D signal on an uplink cell of the FDD band according to whether or not the N signal is transmitted and received, wherein the D2D signal includes: transmitting the N signal by the TDD band; It is characterized in that the reception circuit (RX chain) is received when the reset for the uplink (Upl ink) of the FDD band.
- WAN wide area network
- FDD frequency division duplex band
- D2D device-to-device
- FIG. 1 schematically illustrates an E—UMTS network structure as an example of a wireless communication system.
- 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 radio frame used in an LTE system.
- FIG. 5 illustrates a resource grid for a downlink slot.
- FIG. 6 illustrates a structure of a downlink radio frame used in an LTE system.
- FIG. 7 illustrates a structure of an uplink subframe used in an LTE system.
- 10 is a reference diagram for describing scenarios in which D2D communication is performed.
- 11 is a reference diagram for explaining a receiving circuit / module of a receiving end of a terminal performing D2D communication.
- FIG. 12 illustrates a base station and a terminal that can be applied to an embodiment of 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 technologies such as UTRACUniversal Terrestrial Radio Access) or CDMA2000.
- TDMA can be implemented with wireless technologies such as Global System for Mobi- lecommunication (GSM) / Gene ra 1 Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobi- lecommunication
- GPRS Gene ra 1 Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- 0FDMA may be implemented by a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
- UTRA is part of the UMTSCUniversal Mobile Telecom unicat ions System.
- 3GPP (3rd Generat ion Partnership Project (LTE) Long term evolut ion (LTE) employs 0-FDMA in downlink and SC-FDMA in uplink as part of E-UMTS (Evolved UMTS) using E-UTRA.
- LTE-A Advanced is an evolution of 3GPP LTE.
- Control 2 is a control plane of a radio interface protocol between a terminal and an E-UTRAN based on the 3GPP radio access network standard (Control)
- Control plane is terminal
- 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 is moved between the media access control layer and the physical layer through the transport channel. Data moves between the physical layer between the physical layer of the transmitting side and the receiving side.
- the physical channel utilizes time and frequency as radio resources. Specifically, the physical channel is modulated in the Orthogonal Frequency Diversity Access (0FDMA) method on the downlink, and modulated in the Single Carrier Frequency Diversity Access (SC-FDMA) method on the uplink. -
- OFDMA Orthogonal Frequency Diversity Access
- SC-FDMA Single Carrier Frequency Diversity 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 tradeoff 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 a wireless bandwidth narrow. In order to efficiently transmit IP packet such as IPv4 or IPv6 in the interface, it performs header compression function to reduce unnecessary control information.
- PDCP Packet Data Convergence Protocol
- 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 controlling logical channels, transport channels, and physical channels in association with configuration, reconfiguration, 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 R C layers of the UE and the network exchange RRC messages with each other. If there is an RRC connected (RRC Connected) between the terminal and the RRC layer of the network, the terminal is in the RRC connected mode (Connected Mode), otherwise it is in the RRC idle mode (Idle Mode).
- the non-access stratum (NAS) layer above the RRC layer performs functions such as session management and mobility management.
- One cell constituting an eNB is set to one of bandwidths such as 1.4, 3, 5, 10, 15, and 20 MHz to provide downlink or uplink transmission services 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 user traffic or a control message. ). 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). Meanwhile, 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 user traffic or a control message.
- RACH random access channel
- SCH uplink shared channel
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Modult icast Control Channel
- MTCH Multicast Traffic Channel
- a user device that is powered on again or enters a new 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 Sal 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 control channel (PDCCH) according to physical downlink control channel (PDCCH) and physical downlink control channel information in step S302. Receive a more detailed system information can be obtained.
- PDCH physical downlink control channel
- PDCH 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 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).
- contention resolution procedures such as additional physical random access channel transmission (S305) and physical downlink control channel and physical downlink shared channel reception (S306) are performed. Can be.
- UCI uplink control information
- UCI includes a HARQ AC / NAC (Hybr id Automatic Repeat and reQuest Acknowledgment / Negat ive-ACK), a Scheduling Request (SR), Channel State Information (CS I), and the like.
- HARQ AC / NAC Hybr id Automatic Repeat and reQuest Acknowledgment / Negat ive-ACK
- SR Scheduling Request
- CS I Channel State Information
- HARQ ACR / NACK is simply referred to as HARQ-ACK or ACK / NACK / N).
- HARQ-ACK includes at least one of positive ACK (simply ACK), negative ACK (NACK), DTX and NAC / DTX.
- CSI includes CQKChannel Quality Indicator), PMKPrecoding Matrix Indicator), RKRank Indication), 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 by the 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 subframe units, 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 FDE Frequency Division Duplex (FDE) and a type 2 radio frame structure applicable to Time Division Duplex (TDD).
- FDE 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 TTK transmission time interval.
- the length of one subframe may be lnis and the length of one slot may be 0.5ms.
- 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
- the 0FDM symbol represents one symbol period.
- the 0FDM symbol may also be referred to as an SC-FDMA symbol or symbol period.
- a resource block (RB) as a resource allocation unit may include a plurality of consecutive subcarriers in one slot.
- the number of 0FDM symbols included in one slot may vary depending on the configuration of a cyclic prefix (CP).
- CPs include extended CPs and standard CP normal CPs.
- the number of 0FDM symbols included in one slot may be seven.
- 0FDM symbol is expanded
- 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 interference between symbols.
- one slot When a standard CP is used, one slot includes 7 OFDM symbols, and thus, one subframe includes 14 OFDM symbols.
- up to three OFDM symbols of each subframe may be allocated to a physical downlink control channel (PDCCH), and the remaining OFDM symbols may be allocated to a physical downlink shared channel (PDSCH).
- PDCCH physical downlink control channel
- PDSCH physical downlink shared channel
- Figure 4 (b) illustrates the structure of a type 2 radio frame.
- Type 2 radio frame consists of two half frames, each half frame contains four general subframes including two slots, a down link pilot time slot (DwPTS), and a guard period (GP). And a special subframe including an UpPTSOJplink Pilot Time Slot.
- DwPTS down link pilot time slot
- GP guard period
- a special subframe including an UpPTSOJplink Pilot 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 the interference generated in 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.
- Table 1 if the ⁇ 1/1 5000x2048) represents the DwPTS and UpPTS, the remaining area is set as the guard interval.
- the structure of the type 2 radio frame that is, the UL / DL link subframe configuration (UL / DL configuration) 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 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.
- FIG. 5 illustrates a resource grid for a downlink slot.
- the downlink slot includes N «yn'i> OFDM symbols in the time domain and N resource blocks in the frequency domain.
- Each of the resource blocks to the downlink slot as it includes N B sub-carriers comprises the N x N sub-carriers in the frequency domain.
- 5 shows that a downlink slot includes 70 FDM symbols and 12 resource blocks are included. Although illustrated as including a carrier, it is 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.
- One RB is composed of N b x N resource elements. The number N 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) OFDM symbols located at the front of the first slot of a subframe are assigned to a control region to which a control channel is allocated.
- the remaining OFDM symbols correspond to data regions to which the Physical Downl Ink Shared Channel (PDSCH) is allocated.
- Examples of a downlink control channel used in LTE include a physical control format indicator channel (PCFICH), a physical * downl ink control channel (PDCCH), a physical hybrid ARQ indicator channel (PHICH), and the like.
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information on the number of OFDM symbols used for transmission of control channels within the subframe.
- PHICH carries a HARQ ACK / NACK (Hybr id Automat ic Repeat request acknowledgment / negat ive one acknowledgment) signal in response to uplink transmission.
- DCI Down ink Control Informat ion
- the DCI includes resource allocation information and other control information for the user device or the user device group.
- the DCI includes uplink / downlink scheduling information, uplink transmission (Tx) power control command, and the like.
- the PDCCH includes transmission format and resource allocation information of a downlink shared channel (DL-SCH), transmission format and resource allocation information of an uplink shared channel (UL_SCH), and a paging channel.
- Tx power control command set for individual user devices in the user device group resource allocation information of higher-layer control messages such as paging channel (PCH), paging information on the DL-SCH, system information on the DL-SCH, random access response transmitted on the PDSCH, Tx power control command, VoIP Voice over Information of the activation instruction of the IP).
- a plurality of PDCCHs may be transmitted in the control region.
- the user equipment may monitor the plurality of PDCCHs.
- the PDCCH is transmitted on an aggregation of one or a plurality of consecutive control channel elements (CCEs).
- CCEs control channel elements
- CCE is a logical allocation unit used to provide a coding rate based on radio channel conditions to the PDCCH.
- CCE refers 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 determines the PDCCH format according to the DCI to be transmitted to the user equipment, and adds a CRC cyclic redundancy check to the control information.
- the CRC is masked with an identifier (eg, radio network temporary identifier (RNTI)) according to the owner or purpose of use of the PDCCH.
- RNTI radio network temporary identifier
- an identifier eg, cell-RNTI (C—RNTI)
- C—RNTI cell-RNTI
- P—RNTI paging—RNTI
- SI-RNTI system information RNTI
- RA-RNTI random access-RNTI
- FIG. 7 illustrates a structure of an uplink subframe used in LTE.
- an uplink subframe includes a plurality (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 hops to a slot boundary.
- the PUCCH may be used to transmit the following control information.
- -SR Service Request
- UL UL Information used to request a SCH resource. It is transmitted using 00K (0n-0ff Keying) method.
- -HARQ ACK / NAC This is a response signal for a downlink data packet on a PDSCH. Indicates whether the downlink header packet was successfully received.
- ACK / NACK 1 bit is transmitted in response to a single downlink codeword, and ACK / NACK 2 bits are transmitted in response to two downlink codewords.
- CSI Channel State Information: Feedback information on a downlink channel.
- the CSI includes a CQKChannel Quality Indicator (CQK), and 20 bits per subframe are used as the MIMC Multiple Input Multiple Output (RIQ) related feedback information, including RI (Rank Indicator), PMKPrecoding Matrix Indicator (RIK), and PTKPrecoding Type Indicator.
- CQK CQKChannel Quality Indicator
- RIQ Multiple Input Multiple Output
- the amount of control information (UCI) that a user equipment can transmit in a subframe depends on the number of SC-FDMA available for transmission of control information.
- SC-FDMA available for control information transmission means the remaining SC-FDMA symbol except for the SC-FDMA symbol for transmitting the reference signal in the subframe, and in the case of the subframe in which the Sounding Reference Signal (SRS) is set, the end of the subframe SC-FDMA symbols are also excluded.
- the reference signal is used for coherent detection of the PUCCH.
- FIG. 8 illustrates a Carrier Aggregation (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 (eg, 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 can be determined independently.
- Asymmetrical carrier aggregation in which the number of UL CCs and the number of DL CCs are different is also possible.
- the control information may be set to be transmitted and received only through a specific CC. This particular CC may be referred to as the primary CC (or anchor CC) and the remaining CCs may be referred to as the secondary CC.
- the PDCCH for downlink allocation may be transmitted on DL CC # 0, and the corresponding PDSCH may be transmitted on DL CG # 2.
- a carrier indicator field may be considered.
- the presence of CIF in the PDCCH may be semi-static and terminal-specific (or by higher layer signaling (eg RRC signaling). Terminal group-specific).
- RRC signaling e.g. RRC signaling. Terminal group-specific.
- PDCCH on DL CC allocates PDSCH resources on the same DL CC or PUSCH resources on one linked UL CC.
- PDCCH on DL CC can allocate PDSCH or PUSCH resource on a specific DL / UL CC among a plurality of merged DL / UL CCs using CIF
- the base station may allocate a PDCCH monitoring DL CC set to reduce BD complexity of the UE.
- the PDCCH monitoring DL CC set includes one or more DL CCs as part of the combined total DL CCs, and the UE performs detection / decoding of 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-specific (UE-speci f i c), UE-group-specific or cell-specific (ce l-speci f ic) scheme.
- the term "PDCCH monitoring DL CC" may be replaced with an equivalent term, such as a monitoring carrier, a monitoring cell.
- the CC merged for the terminal may be replaced with equivalent terms such as serving CC; serving carrier, serving cell and the like.
- DL CC A is set to PDCCH monitoring DL CC.
- DL CC AC may be referred to as a serving CC, a serving carrier, a serving cell, and the like.
- CIF is determined by UE-specific (or UE-group-specific or Sal-specific) higher layer signaling.
- the DL CC A may transmit not only the PDCCH scheduling the PDSCH of the DL CC A using GIF but also the PDCCH scheduling the PDSCH of another CC.
- 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 is considering using CIF in a PDCCH for cross-CC scheduling.
- CIF ie support for cross-CC scheduling mode or non-cross-CC scheduling mode
- switching between modes can be set semi-static / terminal-specific via RRC signaling, and corresponding RRC signaling After the process, the terminal can recognize whether CIF is used in the PDCCH to be scheduled.
- D2D UE-to-UE Counique Cat Ion
- the D2D communication scheme can be broadly divided into a scheme supported by a network / coordination station (for example, a base station), and a case not otherwise.
- a network / coordination station for example, a base station
- FIG. 10 (a) shows the intervention of a network / coordination station to transmit and receive a control signal (eg, grant message), HARQ, and channel state information (Channel State Informat i on). This is done and only the data transmission and reception between the terminals performing the D2D communication is shown.
- the network provides only minimum information (for example, D2D connection information available in the corresponding cell), and terminals performing D2D communication form a link and transmit and receive data. The manner of carrying out is shown.
- FIG. 11 is a reference diagram for describing receiving circuits / models of a receiving end of a terminal performing D2D communication.
- the first type is a half-dual D2D receiver (Hal f-Dup l ex D2D receiver), in which RX Processing of D2D communication is used for downlink communication between the base station and the UE. Is performed by reusing the receiving circuits / modules. For example, as shown in FIG. 11 (a), when a half-duplex D2D receiving end is applied, some subframes on the UL band in the FDD system are used for D2D communication (eg, D2D).
- the D2D user equipment may receive a downlink signal (eg, PDCCH, PDSCH) from the base station in subframes on a downlink band (DL band) of at least some (eg, partial or partially) overlapping timing points. There is no.
- a downlink signal eg, PDCCH, PDSCH
- the second type is a full-duplex D2D receiver, which is independent of the (general) receiver circuits / modules in which the receive processing of the D2D communication is used for downlink communication between the base station and the terminal. It is performed based on the receiver circuits / modes in the uplink band (eg, separated) implemented by. Referring to FIG.
- the corresponding D2D UE when the full-duplex D2D receiving end is applied, some subframes on the UL band are configured for D2D communication in the FDD system and the D2D UE
- a D2D signal reception operation eg, D2D data reception operation D2D discovery signal reception operation
- the corresponding D2D UE is at least partially (eg, partially (Partial) or fully (Fully) subframes on the downlink band (DL band) of the overlapping time point may receive a downlink signal (eg, PDCCH, PDSCH) from the base station.
- a downlink signal eg, PDCCH, PDSCH
- a predetermined cell (or component carrier, CO) according to carrier aggregation according to carrier aggregation is defined through resources.
- D2D device-to-device
- a method of efficiently supporting D2D communication of a D2D UE will be described, where D2D communication is used to directly communicate with another UE using a wireless channel.
- the UE means the UE of the user, but when the network equipment such as the eNB transmits / receives signals according to the communication method between the UEs, the network equipment may also be regarded as a kind of UE.
- embodiments of the present invention provide that i) some D2D UEs participating in D2D communication are within the coverage of the network and the remaining D2D UEs are out of coverage of the network.
- ⁇ D2D Discovery / Communication of Partial Network Coverage
- ii D2D UEs participating in D2D communication are all within network coverage
- D2D Discovery / Communicat ion Within Network Coverage D2D Discovery / Communicat ion Within Network Coverage
- iii) D2D communication may also be extended to at least one.
- a D2D UE when D2D communication is performed through predefined resources on a specific cell (black) component carrier (CA) related to carrier aggregation (CA), a D2D UE is performed. May be defined to perform D2D communication based on at least one (ie, some or all) of the first to fourth methods disclosed in the present invention.
- CA component carrier
- the D2D communication is implemented through an uplink resource (on a specific cell) in which the UE performs transmission.
- two cells eg, Primary Cell (PCell) and Secondary Cel 1 (SCel 1)
- PCell Primary Cell
- SCel 1 Secondary Cel 1
- embodiments of the present invention provide a carrier aggregation scheme in which D2D communication is performed through a resource other than an uplink resource (on a specific cell) and / or three or more cells are transmitted to a D2D UE.
- the extension can be applied even when set to.
- a D2D UE having only one reception circuit (Rx Chain or Rx Circuit) for a specific cell may be connected to a WAN associated with a specific cell.
- Wide Area Network can be set to be applied only in case of using / sharing for signal / data reception operation (ie WAN communication reception operation) and D2D signal / data reception operation (ie D2D communication reception operation).
- WAN communication reception operation ie WAN communication reception operation
- D2D signal / data reception operation ie D2D communication reception operation
- a D2D UE performs an WAN signal / data reception operation on a DL CC (ie, band #A) at a specific time (SF # N) of an FDD cell, that is, the FDD cell includes a DL CC and an UL CC.
- D2D signal / data reception on UL and UL CC i.e. band #B
- the DL CCs related to the WAN communication reception operation of the FDD cell and the UL CCs related to the D2D communication reception operation are assumed to be different frequency bands.
- the following specific rule in the embodiments of the present invention is intended to replace the reception circuit (Rx Chain or Rx Circuit) of one band (e.g., a band or a cell) with another band (e.g., temporary ly). It can be interpreted / applied as being used by switching to D2D communication reception operation of a band, cell, or cell).
- Rule 1-B on the first scheme of the present invention or Rule 2-B on the second scheme of the present invention may allow a receiving band (Rx Chain or Rx Circuit) of a specific band to be temporarily (D2D) of another band. Applicable when switching to a communication receiving operation.
- the FDD PCell (where the FDD PCell consists of a DL CC and a UL CC) and a TDD SCell are set to a carrier aggregation (CA) scheme, and D2D communication is performed through predefined resources on the UL CC of the FDD PCell.
- CA carrier aggregation
- CASE # 1-A i) D2D communication reception operation on the UL CC of the FDD PCell, WAN communication reception operation on the DL CC of the FDD PCell, at a specific subframe time point (ie, SF # N), and When the WAN communication reception operation of the TDD SCell overlaps, or ii) at a specific subframe time point (that is, SF # N), on the UL CC of the FDD PCell, the subframe at that time point is configured for D2D communication (reception) use.
- a subframe at that time is configured as a downlink subframe related to WAN communication on a DL CC of an FDD PCell, and a subframe at that time is configured as a downlink subframe related to a WAN communication on a TDD SCell. do.
- the D2D UE performs one reception circuit related to the FDD PCell according to a predefined rule or a related signal reception from the base station, i) receiving an N communication on the DL CC of the FDD PCell (ie, D2D communication reception operation on the UL CC of the FDD PCell) or ii) D2D communication reception operation on the UL CC of the FDD PCell).
- N communication reception operation (Rule 1-A).
- CASE # 1-B at a specific subframe time point (ie, SF # N), i) D2D communication reception operation on the UL CC of the FDD PCell, WAN communication reception operation on the DL CC of the FDD PCell, and When WAN communication transmission operation of TDD SCell (i.e., WAN signal / data transmission operation) overlaps or ii) at a specific subframe time point (i.e., SF # N), the subframe at that time is the D2D communication on the UL CC of the FDD PCell.
- TDD SCell i.e., WAN signal / data transmission operation
- the subframe at that time is configured as a downlink subframe related to WAN communication on the DL CC of the FDD PCell, and the subframe at that time is uplink related to the WAN communication on the TDD SCell. Assume a case where the subframe is configured.
- the D2D UE uses one reception circuit related to the FDD PCell for the WAN communication reception operation on the DL CC of the FDD PCell according to a predefined rule or related signal reception from the base station.
- One related receiver circuit can be (re) used (or borrowed) for D2D communication reception operation on the UL CC of the FDD PCell.
- the D2D UE uses one reception circuit related to the FDD PCell for D2D communication reception operation on the UL CC of the FDD PCell according to a predefined rule or related signal reception from the base station, and one reception related to the TDD SCell.
- the circuit can be used (re) used (or borrowed) for WAN communication reception on the DL CC of the FDD PCell (Rule 1_B).
- the FDD SCell is composed of a DL CC and a UL CC) is configured by a carrier aggregation (CA) scheme, and D2D communication is performed through predefined resources on the UL CC of the FDD SCell.
- CA carrier aggregation
- CASE # 2-A i) D2D communication reception operation on the UL CC of the FDD SCell, WAN communication reception operation on the DL CC of the FDD SCell, at a specific subframe time point (ie, SF # N), and TDD
- N communication reception operation of PCeir overlaps or ii) at a specific subframe time i.e., SF # N
- UL of the FDD SCell on X, the subframe at that time is set for D2D communication (receive)
- a subframe at that time is configured as a downlink subframe related to WAN communication.
- a subframe at that time is configured as a downlink subframe related to WAN communication on the TDD PCell.
- the D2D UE performs i) N communication reception operation on the DL CC of the FDD SCell according to a predefined rule or related signal reception from the base station. Do not perform D2D communication reception operation on the UL CC of the SCell) or ii) Receive D2D communication reception operation on the UL CC of the FDD SCell, and use one reception circuit related to the TDD PCell to receive WAN communication on the TDD PCell. Can be used for operation (Rule 2-A).
- CASE # 2-B 0D2D communication reception operation on UL CC of FDD SCell, WAN communication reception operation on DL CC of FDD SCell, at a specific subframe time point (ie, SF # N), and TDD
- WAN communication transmission operation of PCell overlaps (i.e., WAN signal / data transmission operation) or at a specific subframe time point (i.e., SF # N)
- the subframe at that time is D2D communication ( Receive) and the subframe at that time is configured as a downlink subframe related to WAN communication on the DL CC of the FDD SCell, and the subframe at that time is an uplink subframe related to the N communication on the TDD PCell.
- the frame is set.
- the D2D UE uses one reception circuit related to the FDD SCell for the WAN communication reception operation on the DL CC of the FDD SCell according to a predefined rule or related signal reception from the base station.
- a TDD PCell-related receiver circuit can be (re) used (black borrowed) for D2D communication reception operation on the UL CC of the FDD SCell.
- the D2D UE uses one reception circuit related to the FDD SCell for D2D communication reception operation on the UL CC of the FDD SCell according to a predefined rule or related signal reception from the base station, and one reception related to the TDD PCell.
- the circuit can also be (re) used (or borrowed) for WAN communication reception on the DL CC of the FDD SCell (Rule 2-B).
- one receiver circuit related to a specific cell is (re) used (or borrowed) for a D2D communication reception operation / WAN communication reception operation related to another cell.
- Rule 1-B or Rule 2-B means that particular cell Whether or not one of the related receiver circuits supports reception operations on other cell related bands (or bands) is determined in practice.
- the D2D UE transmits a signal to a base station (or serving cell) through a signal (eg, a physical layer signal or a higher layer signal) previously defined, i) a band in which one receiving circuit related to a specific cell is formed.
- a signal eg, a physical layer signal or a higher layer signal
- the information reporting operation may be interpreted as a kind of "capability signaling (for example, whether or not it is possible to temporarily use one band receiving circuit to switch to another band D2D communication receiving operation)."
- the list of bands for which the reception circuit can be switched may be included in the information report. For example, if the UE is configured to perform WAN DL reception on a specific band combination (3 ⁇ 41 ⁇ 31 011), the UE may inform which bands the remaining reception circuit is available for use in D2D reception.
- band A and band B when WAN DL reception is configured in band A and band B, the UE is able to switch the operation of its own reception circuit for D2D reception in band A, band C or band D. You can tell the facts. Such a report is interpreted that the UE can always receive WAN DL in band A and band B, and at the same time, the UE can receive D2D in either band A, band C or band D, However, band A, band C black may not mean that D2D reception is possible at the same time in two or more bands among band D.
- the report may be notified of a combination of bands that can be switched to use for D2D reception.
- a combination of bands that can be switched to use for D2D reception.
- the UE switches its reception circuit to the D2D reception operation in the band combination ⁇ A, C ⁇ , ⁇ A, D ⁇ . You can tell if it's possible.
- Such a report indicates that the UE can always receive WAN DL in band A and band B. This means that the UE may operate to simultaneously receive D2D signals in bands A and C or to simultaneously receive D2D signals in bands A and D.
- the specific band (for example, band A in the above example) may be included in a combination of WAN DL reception and simultaneously included in a band capable of receiving D2D.
- the band operates TDD, this may mean that D2D reception is possible on the band only if the TDD cell of the band configures an UL subframe.
- the receiving circuit that is the target of the above-mentioned information report may be limited to a receiving circuit of a cell related to a specific system (eg, a TDD or FDD system).
- candidate resources that can be designated for D2D communication on a specific cell (or CC) related to CA are limited to resources described in the fourth to fifth methods. It can be set to be.
- eIMTA enhanced interference management for traffic adaptation
- TIM cell in which a dynamic change mode for radio resource usage is configured, refer to a corresponding elMTA-enabled TDD cell (RRC-signaled) downlink HARQ.
- RRC-signaled elMTA-enabled TDD cell
- cells having different UL-DL configurations are configured with a carrier aggregation scheme, and a UE is configured with a corresponding cell.
- the UE is defined to perform the transmit / receive operation of an uplink / downlink signal according to the limitations of Table 3 (3GPP TS 36.211 Section 4.2 ").
- Frame structure type 2 "
- the UE shall not transmit any signal or channel on a secondary cell in the same sub frame
- 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 symbo 1 s that overlaps with the guard period or UpPTS in the primary cell.
- a UE that cannot perform simultaneous transmission / reception operations may use an uplink subframe on the SCell at a point in time when the PCell uses the downlink subframe and the SCell uses the uplink subframe. If it is designated as a subframe for D2D communication, the uplink subframe on the SCell at that time is D2D communication. Only a scene reception operation (ie, a D2D signal / data reception operation) may be set to regard the allowed subframe.
- embodiments of the present invention may be set to be limited to D2D communication (and / or D2D DISCOVERY) only.
- embodiments of the present invention may be configured to be limited to D2D communication (and / or D2D search of a specific type (eg, TYPEl, TYPE 2B)) of a specific mode (eg, M0DE1, MODE 2). Can also be.
- a specific type eg, TYPEl, TYPE 2B
- a specific mode eg, M0DE1, MODE 2.
- embodiments of the present invention may include i) IN-COVERAGE D2D UE, or ii) PARTIAL COVERAGE D2D UE, or i ⁇ ) 0UT-C0VERAGE D2D UE, or iv) IN-COVERAGE SCENARIO, or v) PARTIAL COVERAGE.
- SCENARIO, or vi) 0UT-C0VERAGE SCENARIO may be configured to apply only to at least one case.
- embodiments of the present invention are RRC CONNECTED D2D UE or RRCJDLE D2D
- FIG. 12 illustrates a base station and a terminal that can be applied to an embodiment of the present invention.
- 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. It can be replaced by a relay.
- 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.
- Process Document 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
- each component or feature is to be considered optional unless stated otherwise.
- Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of one embodiment may be included in another embodiment, or may be substituted for components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
- a specific operation described as performed by a base station in this document may be performed by an upper node in some cases. 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.
- the base station may be replaced by terms such as fixed station, Node B, eNodeB (eNB), access point, and the like.
- an embodiment according to 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 (appl icat ion speci f ic integrated circuits), DSPs (digi tal signal processors), DSPDs (digi tal signal processing devices), Programmable logic devices (PLDs), yield programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application icat ion speci f ic integrated circuits
- DSPs digi tal signal processors
- DSPDs digi tal signal processing devices
- PLDs Programmable logic devices
- FPGAs yield programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- firmware or software an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
- the memory unit may be located inside or outside the processor and may exchange data with the processor by various known means.
- D2D (Devi ce-to-Device) signal receiving method and apparatus for the same in the communication system supporting the wireless carrier aggregation as described above have been described with reference to the example applied to the 3GPP LTE system, in addition to the 3GPP LTE system It is possible to apply to various wireless communication systems.
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Abstract
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Priority Applications (5)
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CN201580022204.8A CN106256096B (zh) | 2014-04-29 | 2015-04-28 | 用于在支持ca的通信系统中接收d2d信号的方法及其设备 |
KR1020167027815A KR20160147734A (ko) | 2014-04-29 | 2015-04-28 | 반송파 집성을 지원하는 무선 통신 시스템에서 D2D(Device-to-Device) 신호 수신 방법 및 이를 위한 장치 |
JP2017506244A JP6421234B2 (ja) | 2014-04-29 | 2015-04-28 | 搬送波集成を支援する無線通信システムにおいてD2D(Device−to−Device)信号の受信方法及びそのための装置 |
EP15786161.8A EP3139522B1 (en) | 2014-04-29 | 2015-04-28 | Method for receiving device-to-device signal in wireless communication system supporting carrier aggregation, and apparatus therefor |
US15/303,135 US10542548B2 (en) | 2014-04-29 | 2015-04-28 | Method for receiving device-to-device signal in wireless communication system supporting carrier aggregation, and apparatus therefor |
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NEC: "Further Considerations on Multiplexing D2D and Cellular Signals", R1-141209, 3GPP TSG RAN WG1 MEETING #76BIS, 21 March 2014 (2014-03-21), Shenzhen, China, XP050786884 * |
SAMSUNG: "Half-duplex UE operation for TDD-FDD CA", R1-141283, 3GPP TSG RAN WG1 MEETING #76BIS, 22 March 2014 (2014-03-22), Shenzhen, China, XP050786955 * |
See also references of EP3139522A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170002379A (ko) * | 2014-04-30 | 2017-01-06 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말 간 통신을 위한 신호를 송수신하는 방법 및 이를 위한 장치 |
KR102345348B1 (ko) | 2014-04-30 | 2021-12-30 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말 간 통신을 위한 신호를 송수신하는 방법 및 이를 위한 장치 |
Also Published As
Publication number | Publication date |
---|---|
EP3139522A1 (en) | 2017-03-08 |
CN106256096B (zh) | 2019-06-18 |
KR20160147734A (ko) | 2016-12-23 |
CN106256096A (zh) | 2016-12-21 |
EP3139522A4 (en) | 2017-12-13 |
EP3139522B1 (en) | 2019-06-05 |
JP6421234B2 (ja) | 2018-11-07 |
JP2017518000A (ja) | 2017-06-29 |
US10542548B2 (en) | 2020-01-21 |
US20170041918A1 (en) | 2017-02-09 |
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