WO2015137720A1 - 무선 통신 시스템에서 장치 대 장치 단말의 디스커버리 신호 전송 방법 및 장치 - Google Patents
무선 통신 시스템에서 장치 대 장치 단말의 디스커버리 신호 전송 방법 및 장치 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/10—Open loop power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/38—TPC being performed in particular situations
- H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
Definitions
- the following description relates to a wireless communication system, and more particularly, to a discovery signal transmission method and apparatus in device to device communication.
- a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- multiple access systems include code division multiple access (CDMA) systems, FDMA frequency division multiple access (TDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division (SC to FDMA).
- CDMA code division multiple access
- TDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC to FDMA single carrier frequency division
- MC multiple access
- D2D communication establishes a direct link between user equipments (UEs) and directly transmits voice, data, etc. between terminals without going through an evolved NodeB (eNB). It is a communication method.
- the D2D communication may include a scheme such as UE-to-UE communication, peer-to-peer communication, and the like.
- the D2D communication scheme may be applied to machine-to-machine (M2M) communication, machine type communication (MTC), and the like.
- M2M machine-to-machine
- MTC machine type communication
- D2D communication has been considered as a way to solve the burden on the base station due to rapidly increasing data traffic.
- the D2D communication unlike the conventional wireless communication system, since the data is exchanged between devices without passing through the base station, the network can be overloaded.
- the D2D communication it can be expected to reduce the procedure of the base station, decrease the power consumption of the devices participating in the D2D, increase the data transmission speed, increase the capacity of the network, load distribution, sal coverage expansion.
- the present invention provides a signal transmission method considering the influence of interference between WAN and D2D signal transmission.
- a method of transmitting a discovery signal by a device-to-device (D2D) terminal in a wireless communication system comprising: selecting a resource pool from at least one resource pool; And transmitting a discovery signal using the resources of the selected resource pool, wherein the resource pool is selected according to an RSRP measurement result.
- D2D device-to-device
- D2D terminal device for transmitting a discovery signal in a wireless communication system, comprising: a receiving module; And a processor, wherein the processor selects a resource pool from at least one resource pool, transmits a discovery signal using resources of the selected resource pool, and the resource pool is selected according to an RSRP measurement result.
- Embodiments of the present invention may include all of the following.
- An RSRP range may be set in each of the one or more resource pools.
- An open loop power control may be applied to the transmission of the discovery signal.
- 0 is the minimum transmission power value ⁇ may be a path attenuation factor.
- the possible value of ⁇ may include 0.
- the 0_D2D_Discovery may be a minimum transmit power value
- P / may be a path attenuation 'D2D_Discoveiy may be a power boosting parameter, and may be a path attenuation factor.
- the size of the resource unit to which the discovery signal is transmitted may vary depending on the RSRP measurement result.
- the size of the resource unit through which the discovery signal is transmitted may be preset by a network operator.
- Each of the one or more resource pools may be assigned a number of repetitions of a discovery signal.
- the number of repetitions may be determined according to the size in the frequency domain of the resource pool.
- the transmission power used for transmitting the physical uplink control channel in the subframe in which the discovery signal is transmitted may be greater than the transmission power used for transmitting the physical uplink control channel in the subframe in which the discovery signal is not transmitted.
- a parameter related to transmit power used for physical uplink control channel transmission in a subframe in which the discovery signal is transmitted may be transmitted through higher layer signaling.
- 1 is a diagram showing the structure of a radio frame.
- FIG. 2 is a diagram illustrating a resource grid in a downlink slot.
- 3 illustrates a structure of a downlink subframe.
- 5 to 7 are diagrams for explaining resource selection for discovery signal transmission according to an embodiment of the present invention.
- FIG. 8 is a diagram illustrating a configuration of a transmission and reception apparatus.
- each component or feature may be considered to be optional unless otherwise stated.
- Each component or feature may be embodied in a form that is not combined with other components or features.
- some components and / or features may be combined to form an embodiment of the present invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
- the base station has a meaning as a terminal node of the network that directly communicates with the terminal. Certain operations described as being performed by the base station in this document may be performed by an upper node of the base station in some cases.
- a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), and an access point (AP).
- the repeater may be replaced by terms such as relay node (RN) and relay station (RS).
- RN relay node
- RS relay station
- the term 'terminal' may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and a subscriber station (SS).
- the term “base station” may be used as a meaning of a device that refers to a scheduling execution node, a cluster header, and the like. If the base station or the relay also transmits a signal transmitted by the terminal, it can be regarded as a kind of terminal.
- a cell described below is applied to transmission and reception points such as a base station (eNB), a sector, a remote radio head (RRH), a relay, and the like. It may be used as a generic term for identifying a component carrier at a point.
- eNB base station
- RRH remote radio head
- relay a relay
- Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802 systems, 3GPP systems, 3GPP LTE and LTE-A (LTE-A) systems, and 3GPP2 systems, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- 0FDMA can be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
- UTRA is part of UMTS Jniversal Mobile Telecommunications System.
- 3GPP (3rd Generation Partnership Project) LTEClong term evolution (3GPP) is part of Evolved UMTS (E-UMTS) using E-UTRAi, and employs OFDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced
- WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on 3GPP LTE and 3GPP LTE-A systems, but the technical spirit of the present invention is not limited thereto.
- a structure of a radio frame will be described with reference to FIG. 1.
- uplink / downlink data packet transmission is performed in subframe units, and one subframe is defined as a predetermined time interval including a plurality of OFDM symbols.
- the 3GPP LTE standard supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to TDDCTime Division Duplex (TDDCTime Division Duplex).
- the downlink radio frame consists of 10 subframes, and one subframe consists of two slots in the time domain. Because one subframe is TTKtransmission time interval to the time it takes for the transfer), and, for example in the length of one subframe is 1ms, may be the length of one slot it is 0.5ms.
- One slot includes a plurality of OFDM symbols in the time domain and includes a plurality of resource blocks (RBs) in the frequency domain.
- RBs resource blocks
- a resource block (RB) is a resource allocation unit and may include a plurality of consecutive subcarriers in one block.
- the number of OFDM symbols included in one slot may vary depending on the configuration of a CP Cyclic Prefix).
- CP has an extended CP (extended CP) and the normal CP normal CP (CP).
- extended CP extended CP
- CP normal CP normal CP
- an OFDM symbol consists of a generic CP
- the number of OFDM symbols included in one slot may be seven.
- the number of OFDM symbols included in one slot is smaller than that of the normal CP.
- the number of OFDM symbols included in one slot may be six. If the channel state is unstable, such as when the terminal moves at a high speed, an extended CP may be used to further reduce intersymbol interference.
- one slot When a normal CP is used, one slot includes 7 OFDM symbols, and thus, one subframe includes 14 OFDM symbols.
- the first two or 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
- FIG. 1B is a diagram illustrating a structure of a type 2 radio frame.
- FIG. Type 2 radio frames consist of two half frames, each of which has five subframes, a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
- DwPTS downlink pilot time slot
- GP guard period
- UpPTS uplink pilot time slot
- One subframe consists of two slots.
- DwPTS is used for initial cell search, synchronization or channel estimation at the terminal.
- UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
- the guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
- one subframe consists of two slots regardless of the radio frame type.
- the structure of the radio frame 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. 2 is a diagram illustrating a resource grid in a downlink slot.
- One downlink slot includes seven OFDM symbols in the time domain and one resource block (RB) is shown to include 12 subcarriers in the frequency domain, but the present invention is not limited thereto.
- one slot may include 7 OFDM symbols, but in the case of an extended CP, one slot may include 6 OFDM symbols.
- Each element on the resource grid is called a resource element.
- Single Resource blocks contain 12x7 resource elements.
- the number of resource blocks (NDLs) included in the downlink slot depends on the downlink transmission bandwidth.
- the structure of the uplink slot may be the same as that of the downlink slot.
- PDSCH Physical Downlink Shared Channel
- Downlink control channels used in the 3GPP LTE / LTE-A system include, for example, a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), Physical HARQ indicator channel (Physical Hybrid automatic repeat request Indicator Channel; PHICH).
- PCFICH Physical Control Format Indicator Channel
- PDCH Physical Downlink Control Channel
- PHICH Physical HARQ indicator channel
- the PHICH includes an HARQ ACK / NACK signal as an acknowledgment of uplink transmission.
- Control information transmitted through the PDCCH is referred to as downlink control information (DCI).
- the DCI includes uplink or downlink scheduling information or an uplink transmit power control command for a certain terminal group.
- PDCCH includes resource allocation and transmission format of DL shared channel (DL-SCH), resource allocation information of UL shared channel (UL-SCH), paging information of paging channel (PCH), system information on DL—SCH, and PDSCH Resource allocation of upper layer control messages, such as random access responses transmitted to the network, a set of transmit power control commands for individual terminals in an arbitrary terminal group, transmit power control information, and activation of voice over IP (VoIP) And the like.
- DL-SCH DL shared channel
- UL-SCH resource allocation information of UL shared channel
- PCH paging information of paging channel
- system information on DL—SCH system information on DL—SCH
- PDSCH Resource allocation of
- a plurality of PDCCHs may be transmitted in the control region.
- the terminal may monitor the plurality of PDCCHs.
- the PDCCH is transmitted in an aggregation of one or more consecutive Control Channel Elements (CCEs).
- CCE is a logical allocation unit used to provide a PDCCH at a coding rate based on the state of a radio channel.
- the CCE processes multiple resource element groups.
- the number of CCEs required for the PDCCH may vary depending on the size and coding rate of the DCI. For example, any one of 1, 2, 4, and: 8 (corresponding to PDCCH formats 0, 1, 2, and 3, respectively) can be used for PDCCH transmission.
- the base station determines the PDCCH format in consideration of the size of the DCI transmitted to the terminal, the cell bandwidth, the number of downlink antenna ports, the PHICH resource amount, and adds a cyclic redundancy check (CRC) to the control information.
- the CRC is masked with an identifier called Radio Network Temporary Identifier (RNTI) according to the owner or purpose of the PDCCH. If the PDCCH is for a specific UE, a cell—RNTKC-RNTI) identifier of the UE may be masked to the CRC.
- RNTI Radio Network Temporary Identifier
- a paging indicator identifier may be masked to the CRC.
- the PDCCH is for system information (more specifically, system information block (SIB))
- SIB system information block
- RNTKSI-RNTI may be masked to the CRC.
- random access -RNTKRA-RNTI may be masked to the CRC.
- the uplink subframe may be divided into a control region and a data region in the frequency domain.
- a physical uplink control channel (PUCCH) including uplink control information is allocated to the control region.
- a physical uplink shared channel (PUSCH) including user data is allocated.
- PUCCH physical uplink control channel
- PUSCH physical uplink shared channel
- one UE does not simultaneously transmit a PUCCH and a PUSCH.
- PUCCH for one UE is allocated to an RB pair in a subframe. Resource blocks belonging to a resource block pair occupy different subcarriers for two slots. This is called that the RB pair allocated to the PUCCH is frequency-hopped at the slot boundary.
- uplink power control is applied for smooth demodulation of uplink control information and data, and this is performed by PUCCH power control, PUSCH power control, and uplink sounding reference signal (SRS) power control. Can be distinguished.
- PUCCH power control uses pathloss to maximize demodulation of control information transmitted on PUCCH at a sufficiently low error rate. It is determined in consideration of power and the like.
- PUCCH power control in subframe i of cell c may be performed by Equation 1 below.
- 3 ⁇ 4VIAX ⁇ (0 means the maximum transmit power at the terminal and becomes the upper limit of the PUCCH power control command.
- 0 ⁇ PUCCH fe PUCCH transmit power value that the base station wants to receive. This value is transmitted by higher layer signaling as a UE-specific parameter and is determined by the sum of (nominal power value P 0_NOMINAL_ KJCCH and ⁇ O JEJ CCH).
- ⁇ J is a pathloss value in cell c, which is estimated by the UE. This value can be estimated by the UE by measuring the received power of a downlink cell specific reference signal (CeU-specific Reference Signal, CRS).
- CRS downlink cell specific Reference Signal
- h ⁇ CQI, riHARQ, n SR is a value dependent on pucC H format, where n c & is the number of bits representing channel quality information, rl HAR ⁇ ⁇ the number of HARQ bits, and H SR is a sub 1 if frame i is configured for a scheduling request; otherwise, has a value of zero.
- hn CQI, n HARQ, n SR are dependent on p UCCH format. Specifically, i) 0 for PUCCH format 1, la, lb, ii) one or more serving cells in PUCCH format lb.
- AFJPUCCH (/ is a value signaled from an upper layer in consideration of MCS. This is a signal-to-noise interference ratio (SINR) in which the number of bits per subframe and different error rates are required according to the PUCCH format. ) Is a value to reflect the need.
- SINR signal-to-noise interference ratio
- ⁇ TxD ⁇ is a power offset signaled from a higher layer when a PUCCH is transmitted using two antenna ports, and is a value dependent on the PUCCH format.
- G ⁇ is the current PUCCH power control adjustment state accumulation value, and the power value s PUCCH corresponding to the transmit power control command field value included in the DCI format transmitted on the PDCCH and the immediately preceding PUCCH; It is determined by the ⁇ , which is the PUCCH power control adjustment state value of the subframe.
- the PUSCH power control when the PUCCH transmission is not accompanied may be determined as in Equation 2 below.
- ⁇ CLPUSCH CO means a PUSCH transmit power value that the base station wants to receive. This value is the nominal power value _NOMI AL_ PUCCH and p
- a TF, c (0 is a value calculated using a value transmitted through higher layer signaling and bits per RE (Bit Per Resource Element, BPRE), CQI, PMI, and the like.
- [67] is an accumulation value, and a power value corresponding to a transmit power control (TPC) command field value included in a DCI format transmitted on a PDCCH.
- TPC transmit power control
- ⁇ PUSCH which is a value according to setting such as PUSCH , FDD, TDD, etc. and 1) which is the cumulative value up to the previous subframe.
- the PUSCH power control is expressed by Equation 3 below.
- UCCH is a linear value for pucCH power control determined by Equation 3. The remaining parameters are as described above.
- some nodes may transmit and receive D2D synchronization signals (D2DSS, D2D Synchronization Signal) for transmitting and receiving D2D signals (the nodes may be called eNB, UE, SRN (synchronization reference node or synchronization source)).
- D2D synchronization signals D2D Synchronization Signal
- the nodes may be called eNB, UE, SRN (synchronization reference node or synchronization source)
- a method of transmitting and receiving signals in synchronization with the remaining terminals may be used.
- the PD2DSS may be a Zadoff-chu sequence of predetermined length or a structure similar to / modified / repeated from PSS.
- SD2DSS may be similar to M-Siemens or SSS / modified / repeated structure and the like. If UEs synchronize from eNB, SRN becomes eNB and D2DSS becomes PSS / SSS.
- PD2DSCH Physical D2D synchronization channel
- D2D signal for example, D2DSS-related information, duplex mode (Duplex Mode, DM), TDD UL / DL configuration, Resource pool related information, type of application related to D2DSS, etc.
- the PD2DSCH may be transmitted on the same subframe as the D2DSS or on a subsequent subframe.
- the SRN may be a node transmitting a D2DSS and a Physical D2D Synchronization Channel (PD2DSCH).
- the D2DSS may be in the form of a specific sequence
- the PD2DSCH may be in the form of a sequence representing specific information or a code word after a predetermined channel coding.
- the SRN may be an eNB or a specific D2D terminal.
- the UE may be an SRN, and in the case of intercell discovery, the UE may be an SRN in order for neighboring UEs to know timing.
- the UE may relay the D2DSS at a time point of adding a predetermined offset to the timing received from the terminal.
- the D2DSS can be relayed through multiple suctions. If there are a plurality of terminals relaying the D2DSS or there are a plurality of clusters in the vicinity, the terminal receiving the D2DSS may observe a plurality of D2DSS and may receive D2DSS having different absorptions. [75] Discovery Signal Transmission and PUCCH Transmission
- discovery signal transmission for discovering between terminals may be classified into the following two types.
- Type 1 is discovery signal transmission when discovery signal transmission resource allocation is not UE-specific
- type 2 is signal transmission when discovery signal transmission resource allocation is UE-specific.
- the network configures only the resource region where the discovery signal is transmitted, and the terminal may transmit the discovery signal by determining a resource (random, random or energy sensing based, etc.) in the resource region.
- the resource region through which the discovery signal is transmitted may not overlap with the PUCCH resource region.
- the PUCCH resource is a resource for transmitting legacy ACK / NACK or CSI
- legacy UEs may be excluded from the discovery signal transmission resource region.
- PUCCH transmission may be severely interrupted by in-band emission (Gnband emission) during discovery signal transmission. Therefore, hereinafter, methods for protecting both discovery signal transmission and PUCCH transmission will be described.
- the following description focuses on the relationship between the discovery signal and the PUCCH transmission, but the scope of the present invention is not necessarily limited thereto, and the present invention may be applied to a relationship between transmission of D2D signals and WAN signals other than the discovery signal.
- PUCCH transmission may be protected through transmission power control.
- the control of the transmission power is that the open loop power control is appropriate due to the characteristics of the discovery signal transmission (closed loop power control may be applied depending on the D2D signal type). That is, when the UE transmits the discovery signal, the transmit power may be based on Equation 4 below.
- 0_D2D_D 1S cove i y; a and ⁇ ⁇ > 2 ⁇ »_ Discovery may be signaled to the terminal in advance or a preset value. That is, mD — Discover, CC may be signaled to the terminal through higher layer signaling (eg, RRC signaling), broadcast or physical layer signaling (system information block, PDCCH or EPDCCH, etc.). Parameters related to the power control may also be signaled in the same manner as in the above example. Backoff parameter
- ⁇ D2D_Discovery is the offset at which J P 0_D 2 D_Discovery is introduced such that the D2D signal transmits at lower (or higher) power if the value of another cell is reused.
- D2D maximum transmit power / CMAX can be set separately from the existing CMAX ⁇
- non-signaled parameters which are previously set to a specific value, are reused as they are signaled for cell use, or are reused as signaled for use with Overr, and then separate signaling for D2D is performed.
- the signaled value may be used.
- the signaled value may be used. For example, 0— D 2 D_D 1SCOVe ry , U
- the value of PUSCH or PUCCH is used and not separately signaled, and A D2D_Discovery may be signaled for D2D .
- adjustment of the discovery signal transmission power may be performed by stepped transmission power adjustment.
- the transmission power may be transmitted at a preset transmission power XdBm.
- Y may be set smaller than X.
- the stepped transmission power setting method is not limited to two steps, and may be generalized by setting ⁇ transmission power values.
- the threshold for the signal strength from the base station and the transmission power within the corresponding threshold range may be preset values, or may be signaled from the base station to the terminal as a physical layer or higher layer signal.
- an area for transmitting the discovery signal may be separately set.
- one or more resource pools for discovery transmission may be configured, and a range of RSRP (or a value related to received signal strength such as RSRQ) may be set in each of the one or more resource pools.
- the specific D2D UE may select a resource pool of a range including RSRP and transmit a discovery signal using a resource (which may be randomly selected from the resource pool) for transmitting a discovery signal in the resource pool.
- the UE having type 1 discovery may select a resource pool from one or more resource pools and transmit a discovery signal using all resources of the selected resource pool.
- the resource pool is selected according to the RSRP measurement result.
- 5 and 6 illustrate this example.
- two resource pools are configured for discovery signals.
- Each of these two resource pools has an RSRP range.
- resource pool 1 may be for the RSRP range -110 to -80
- resource pool 2 may be for the RSRP range -80 to -60.
- Terminals having similar RSRPs eg, terminals belonging to UE group # 1 due to similar distances from the base station may transmit discovery signals using resources of the same resource pool.
- the resource pool is illustrated as being configured in a TDM scheme.
- a plurality of resource pools may be configured as FDM or TDM + FDM although not shown.
- This configuration allows a terminal having the same repetition factor (or the same unit size) to be transmitted to a similar resource region, thereby simplifying the design of a hopping pattern.
- the configuration allows for a nearby terminal or a terminal with similar transmission powers to transmit (at the same time) on the same resource to mitigate performance degradation due to in-band radiation.
- the signal of the far terminal may be impossible to receive due to in-band radiation of the nearby terminal. In this case, this phenomenon may be mitigated by setting the nearby terminals to transmit simultaneously on the same resource.
- the transmission resource region may be classified according to the transmission power size regardless of the RSRP.
- the discovery signal transmission resource region (resource pool) according to the signal strength (or transmit power) of the base station is preset or physical layer signaling (SIB, PDCCH / EPDCCH, etc.) or higher layer signaling (RRC signaling) by the network.
- SIB physical layer signaling
- PDCCH / EPDCCH, etc. PDCCH / EPDCCH, etc.
- RRC signaling higher layer signaling
- the network may deliver a plurality of resource pool configurations and transmit power of each resource pool to the terminal through physical layer signaling or higher layer signaling.
- the terminal may select a resource pool according to a target discovery range (a target communication range in the case of a communication signal) and transmit a discovery signal at a transmission power set in the selected resource pool.
- the resource pool A may transmit at transmit power P_A dBm and transmit the number of repetitions to N_A
- the resource pool B may transmit at transmit power P_B dBm and transmit the repetitions to N_B.
- the number of repetitions for each resource pool may be signaled by the network as a physical layer or a higher layer signal.
- the number of repetitions / unit size according to each resource region may be set in advance, or the network may signal the terminal to a physical layer or a higher layer signal.
- the terminal may transmit the D2D signal at a predetermined number of repetitions and a predetermined transmission power in a predetermined resource region.
- Different transmission powers and / or repetition times for each resource pool may be set for each step of the target range. For example, when a discovery range of three levels (short / medium / long) is set, the range may be classified by dividing the resource area into three types and setting different transmission power and / or repetition frequency in each area. Each terminal selects a resource according to a target range of an application or a service, and transmits a D2D signal at a transmission power / repetition frequency set in the corresponding resource.
- the number of repetitions in each resource pool may be determined in advance or configured by a higher layer signal according to the target range, and the D2D signal transmitting terminal sets the number of repetitions and the transmission power according to the target range, and then sets the D2D communication packet. Can be sent.
- the transmission resource pool may be divided according to the number of repetitions.
- the transmission power and the number of repetitions for each D2D resource pool may be predetermined or signaled by higher layer signals.
- the repetition frequency may be the maximum, minimum, or average repetition frequency in the corresponding resource pool.
- the SA pool may be predetermined to transmit power and / or the number of repetitions according to the target range, or may be signaled to the terminal as a physical layer or a higher layer signal.
- the number of repetitions of the discovery signal may be determined according to the signal strength (RSRP, etc.) from the base station.
- the repetition number may mean the repetition number within one period of the discovery resource or the maximum number of times that can be transmitted within a predetermined time.
- the number of repetitions of the discovery signal may be set to M times, and when the RSRP is less than or equal to the threshold value, the number of repetitions of the discovery signal may be set to N times.
- the larger the RSRP i.e., the closer to the base station
- the lower the transmission power of the discovery signal is, so that M may be set larger than N to compensate for the loss of coverage due to the transmission power by repeated transmission.
- the number of repetitions of the discovery signal may be preset according to the RSRP as shown in Table 1 below.
- the number of repetitions according to the signal strength (or transmit power) of the base station is preset or transmitted by the network by physical layer signaling (SIB, PDCCH / EPDCCH, etc.) or higher layer signaling (RRC signaling). Can be. Out of coverage In the case of a terminal, the network operator may operate at a value previously set. When the configuration shown in Table 1 is signaled to the UE, the threshold value of each boundary and the number of repetitions of each region may be included in the physical layer or higher layer signal.
- the operation of setting the number of repetitions according to the signal strength of the base station mentioned above may be implemented by setting one discovery signal unit larger (or smaller). That is, the size of the discovery unit is set according to the signal strength from the base station. For example, when the signal strength of the base station is greater than or equal to P, (2RB X 2SF) may be set to one discovery signal unit, and if less than P, (2RB X 1SF) may be set to one discovery signal unit.
- the size of one discovery signal unit may be defined as the number of SFs in the time domain and the number of RBs in the frequency domain.
- the discovery signal unit size according to RSRP may be set in advance or may be delivered by a network by physical layer signaling (SIB, PDCCH / EPDCCH, etc.) or higher layer signaling (RRC signaling).
- SIB physical layer signaling
- PDCCH Physical Downlink Control Channel
- RRC higher layer signaling
- the network operator may operate at a preset value.
- the number of iterations (or unit size) in a resource pool may be determined by the frequency (and / or time) resource size or system bandwidth of the resource pool. For example, if the system bandwidth is above a certain RB, the number of repetitions (or unit sizes) can be set to A. If the system bandwidth is below a certain RB, the number of repetitions (or unit sizes) can be set to B. This method is to reduce the number of repetitions in the first place because the frequency (and / or time) diversity cannot be obtained when the frequency resource size is small, so that the D2D signals of more terminals are multiplexed or the interference by repetition is reduced. .
- the number of iterations (unit size) according to the resource pool size (or system bandwidth) can be predetermined in arbitrary steps.
- the frequency size (or system bandwidth size) of the D2D resource pool is divided into N stages, with each stage The number of iterations (or unit size) can be predetermined.
- the repetition number may be determined according to the unit size (PRB size) or information bit size of the D2D signal.
- the repetition frequency may be a
- the repetition frequency when the unit size is a B PRB pair, the repetition frequency may be set to b.
- the repetition frequency when the information bit size is greater than or equal to a certain number, the repetition frequency may be determined as c, and when the information bit size is less than or equal to d. This method is to compensate for this by securing a constant coding rate when the unit size of the D2D signal is set small or by increasing the number of repetitions in order to obtain an energy gain. If the unit size is set above a certain amount of coding gains can be obtained, so it is possible to prevent unnecessary resource waste by setting or reducing the repetition.
- the coding rate cannot be sufficiently secured, and thus, the D2D coverage cannot be secured.
- the number of repetitions can be increased to obtain an energy gain or to lower the effective coding rate.
- the setting of the resource size (or system bandwidth), or the number of repetitions (or unit sizes) according to the D2D signal unit size or information bit size may be separately set for a scheduling assignment (SA), a type 1 discovery, and a type 2 discovery. Some may use values to be signaled by the network. There is also.
- the number of resource pool iterations (or unit size) for these two D2D signals is not predetermined and can always use the values configured by the network. have.
- a preset repetition number (or unit size) may be required when transmitting a D2D communication packet out of coverage, and a preset repetition number (or unit size) is set by the system bandwidth. Can be used.
- the preset number of repetitions (or unit sizes) is predetermined according to the size (or system bandwidth) of the resource pool, and when the network indicates the number of repetitions (or unit sizes) as a higher layer signal, the indicated number of repetitions ( Or unit size).
- the rule may be determined to use the corresponding repetition frequency (or unit size). Can be.
- the frequency resource region may be limited.
- a UE near a base station transmits a discovery signal using a resource near a PUCCH resource
- serious interference may occur in the PUCCH region due to in-band radiation of the signal (e.g., an EVM-shoulder determined by EVM requirements).
- an area indicated by a circle overlaps a PUCCH area (the area next to a useful signal overlaps a PUCCH resource)
- serious interference may occur with the PUCCH.
- the resource region for the discovery signal may be limited on the frequency axis such that resources near the PUCCH resource cannot be used for D2D discovery signal transmission.
- the transmission limitation (or usable frequency domain) of this frequency resource region may be selectively applied according to the signal strength (RSRP or RSRQ) of the base station, and the threshold of the base station signal strength required and the limited transmission region (or available frequency)
- the area may be indicated to the UE in advance by an upper layer signal (eg, RRC) or a physical layer signal (eg, ((E) PDCCH or SIB).
- UEs (UE group # 1) having an RSRP greater than or equal to a preset value may be limited to not using the resource pool 2.
- FIG. This may be understood as defining the mapping relationship between the resource pool and the RSRP in the embodiment in which resource pools are set for each RSRP. That is, the resource pool may be set for each RSRP, but the larger the RSRP, the farther from the PUCCH region. That is, in FIG. 6, the resource usage regions of the UE group # 1 and the UE group # 2 are set to be separated in frequency.
- the available frequency range according to the received signal strength (RSRP or RSRQ) from the base station in advance may be preset or an upper layer signal (e.g. RRC) or a physical layer signal (e.g. ((E) a PDCCH or a SIB) may be indicated to the mobile station.
- RSRP or RSRQ received signal strength
- the aforementioned method of classifying the frequency resource region according to the signal strength of the base station may be implemented by classifying the frequency resource according to the transmission power of the terminal.
- a terminal having a transmit power of a dBm or more (or a maximum transmit power of XdBm) may be configured as shown in FIG.
- a UE transmitting a D2D signal in a resource region and having a dBm or less (or a maximum transmit power of YdBm) may use a resource region of UE group 2.
- a representative value of transmission power for indicating transmission power, transmission power range, or transmission power range for each resource region may be predetermined or signaled to the terminal as a physical layer or a higher layer signal.
- the separation of the frequency domain may be implemented by changing the transmission probability rather than explicitly changing the resource domain.
- a UE having a received signal strength greater than or equal to a predetermined threshold may set a transmission probability of a discovery signal by decreasing a predetermined offset (> 0) from an average or a preset value in the vicinity of the PUCCH region.
- the transmission probability for each frequency region is set differently so that a UE near the base station can hardly transmit a signal in the RB near the PUCCH resources.
- the transmission probability for each RB may be a function of the reception signal strength of the base station.
- transmission probability adjustment for each RB may be implemented by applying an offset to an average transmission probability.
- the offset value may be set to be larger in the RB near the PUCCH resource as the signal strength of the base station is larger, and the offset value is smaller in the RB near the PUCCH resource as the signal strength of the base station is smaller.
- a specific offset for the transmission probability may be set in advance to the terminal (preset or signaled by a higher layer signal such as RRC), and whether to apply the offset may be set according to the received signal strength from the base station.
- the resource may be allowed to be used near the PUCCH resource, but the discovery transmission power may be limited. That is, in FIG. 6, the terminals of the terminal group # 1 may also select the resource pool 2, but limit the transmission strength when transmitting the discovery signal in the resource pool 2. At this time, limiting the transmit power means that the maximum transmit power is p.
- the minimum transmit power (G_D 2 D _ D i scovery ) may vary Can also be set.
- the UEs of UE group # 2 of FIG. 6 are configured to transmit only with a power below a certain threshold in the vicinity of the PUCCH resource region or the PUCCH region.
- G—D 2 D_Di SC0Vry may be set smaller than other areas.
- the maximum transmit power for each frequency domain may be defined as a function of received signal strength from the base station. For example, the larger the received signal strength from the base station, the smaller the maximum transmit power near the PUCCH region, and the smaller the received signal strength from the base station, the larger the maximum transmit power near the PUCCH region.
- the foregoing descriptions are methods for the limitation of discovery signal (e.g., selection of resource pool, determination of frequency domain, transmission power control, etc.) in the relationship between discovery signal transmission and PUCCH transmission.
- the purpose of interference mitigation in terms of PUCCH power control may be achieved. That is, in the region where the discovery signal is expected to be transmitted, the PUCCH power control is set differently from the power control in the subframe not related to the discovery signal transmission. In other words, the transmission power used for PUCCH transmission in a subframe in which the discovery signal is transmitted may be set larger than the transmission power used for PUCCH transmission in the subframe in which the discovery signal is not transmitted.
- PUCCH power control according to an embodiment of the present invention can be performed by the following equation (5).
- the ⁇ 0_PUCCH value is a value indicated by an upper layer.
- a separate ⁇ O—PUCCH may be indicated as an upper layer signal (eg, RRC signaling) to use a different transmit power.
- ⁇ UE PUCCH and ⁇ O NOMINAL PUCCH can be separated, but boosts power only to UEs transmitting PUCCH in a subframe in which a discovery signal is transmitted.
- Only E j PUCCH may be indicated by a separate higher layer signal (eg, RRC signaling).
- RRC signaling e.g., RRC signaling
- the predetermined offset to the existing E_ PUCCH in different implementations may be directed by the offset to an upper layer signal.
- the PUCCH transmission power By boosting the PUCCH transmission power as described above, it is possible to reflect the specificity when the discovery signal is transmitted.
- the discovery signal can be transmitted by the RRC idle mode UE, the UE that transmits the discovery signal does not know TA timing advance and transmits the signal at a timing different from the transmission timing of the existing uplink signal. This may cause the base station to lose orthogonality with the existing uplink signal. Accordingly, there is a possibility that high interference is observed due to ICI in the subframe in which the discovery signal is transmitted. Therefore, in this case, by boosting the PUCCH transmission power, it is possible to implement a stable PUCCH transmission.
- the power of the SRS may also be boosted than the conventional operation in the subframe in which the discovery signal is transmitted.
- the interference may be higher than that of other subframes, and thus, the network may instruct the SRS to be transmitted at a high power in the corresponding subframe.
- the existing SRS power control is shown in Equation 6 below.
- O_PUSCH ; « C is the value indicated by the upper layer.
- a value different from that in the subframe in which the discovery signal is not transmitted may be indicated by the network. This value may be indicated to the terminal by a higher layer signal (eg, RRC signaling).
- P O_ P USCH, C are indicated as ⁇ J E _ PUCCH , c, P 0— NOMINAL— PUCCHC :, and apply SRS power boosting only to a UE transmitting SRS in a subframe in which a discovery signal is transmitted. In order to do this, only EJ> UCC C may be signaled to the UE as a separate higher layer signal.
- the SRS is transmitted in a subframe in which the discovery signal is transmitted in a subframe in which the discovery signal is transmitted.
- P SRS_OFFSET; c may also be indicated by a separate higher layer signal (eg, RRC signaling).
- the above-described PUCCH and SRS power control scheme is to apply additional transmission power assuming that a discovery signal is transmitted. If the discovery signal is hardly transmitted, it is an unnecessary operation or rather, boosts power of PUCCH and SRS. As a result, the discovery signal reception quality may be seriously degraded. To compensate for this problem, the PUCCH and / or SRS power boosting operation may be selectively applied only when the discovery signal is observed above a certain threshold.
- a UE transmitting a PUCCH or SRS observes a discovery signal during a certain window (for example, performs energy sensing in an area in which a discovery signal is transmitted (or in a PUSCH region) and transmits or receives a signal or a signal above a predetermined threshold). It may be predetermined to be selectively performed only when power is observed.
- methods for reducing interference between a D2D signal (eg, a discovery signal) and a PUCCH signal may be used in combination of one or more.
- the discovery resource pool is selected according to the base station signal strength
- the transmit power during PUCCH transmission in a subframe in which the discovery signal is transmitted may be set larger than the transmit power in the subframe in which the discovery signal is not transmitted.
- power control according to the signal strength of the base station and resource classification scheme may be used together.
- the above-described scheme may be selectively used depending on whether CP length is set. If the cell signal and the discovery signal have the same CP, the effect of in-band radiation is considered. However, if different CPs are set, not only the in-band radiation but also the ICI due to the lack of orthogonality should be considered. Therefore, when the CP lengths of the wide-area network (for example, the cellular) signal and the discovery signal are the same, only the above-described limitation of the frequency usage area is used. In other cases, the above-mentioned limitation of the frequency usage area and PUCCH power control are used. SRS power control may be used together.
- the proposed scheme is not limited to transmission of a discovery signal, and some of the proposed schemes may be selectively applied when a D2D communication signal, a scheduling assignment for communication, or a D2D synchronization signal is transmitted.
- scheduling allocation refers to a control signal including a transmission resource location, ID, etc. of the D2D communication packet before D2D communication packet transmission.
- the power control unit may use the same power control parameters when the D2D transmission signal is different, or may set / signal different parameters (eg, PO, alpha, power offset, etc.) for each signal.
- the proposed scheme may be applied differently according to the D2D signal.
- a closed-loop power control may be used for transmission of a mode operating under the control of a base station in a D2D communication signal, but a mode operating in a situation in which there is no individual control of the base station in a D2D communication signal may be one of the proposed methods. Some may apply.
- FIG. 8 is a diagram illustrating the configuration of a transmission point apparatus and a terminal apparatus according to an embodiment of the present invention.
- the transmission point apparatus 10 includes a receiving module 11, a transmission module 12, a processor 13, a memory 14, and a plurality of antennas 15. It may include.
- the plurality of antennas 15 means a transmission point apparatus that supports MIMO transmission and reception.
- the receiving modules 11 may receive various signals, data, and information on uplink from the terminal.
- the transmission module 12 may transmit various signals, data, and information on downlink to the terminal.
- the processor 13 may control the operation of the overall transmission point apparatus 10.
- the processor 13 of the transmission point apparatus 10 may process matters necessary in the above-described embodiments.
- the processor 13 of the transmission point apparatus 10 performs a function of processing information received by the transmission point apparatus 10, information to be transmitted to the outside, and the memory 14 is processed.
- Information and the like may be stored for a predetermined time, and may be replaced with a component such as a buffer (not shown).
- the terminal device 20 receives the reception modules 21. It may include a transmission module 22, a processor 23, a memory 24, and a plurality of antennas 25.
- the plurality of antennas 25 mean a terminal device that supports MIMO transmission and reception.
- the receivers 21 may receive various signals, data, and information on downlink from the base station.
- the transmission modules 22 may transmit various signals, data, and information on the uplink to the base station.
- the processor 23 may control operations of the entire terminal device 20.
- the processor 23 of the terminal device 20 may process necessary items in the above-described embodiments.
- the processor 23 of the 12 terminal device 20 performs a function of processing information received by the terminal device 20, information to be transmitted to the outside, and the memory 24 includes information processed by arithmetic processing. It may be stored for a predetermined time, it may be replaced by a component such as a buffer (not shown).
- the description of the transmission point apparatus 10 may be equally applied to the relay apparatus as the downlink transmission entity or the uplink reception entity, and the description of the terminal device 20 is described. The same can be applied to a relay apparatus as a downlink receiving entity or an uplink transmitting entity.
- Embodiments of the present invention described above may be implemented through various means.
- embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable.
- Logic Devices Field Programmable Gate Arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- the method according to the embodiments of the present invention may be implemented in the form of modules, procedures, or functions for performing the functions or operations described above. Can be implemented.
- 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.
- Embodiments of the present invention as described above may be applied to various mobile communication systems.
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Abstract
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Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15760872.0A EP3119012B1 (en) | 2014-03-11 | 2015-03-11 | Method and apparatus for device-to-device user equipment to transmit discovery signal in wireless communication system |
| US15/124,936 US10897787B2 (en) | 2014-03-11 | 2015-03-11 | Method and apparatus for device-to-device user equipment to transmit discovery signal in wireless communication system |
| KR1020167027071A KR102378132B1 (ko) | 2014-03-11 | 2015-03-11 | 무선 통신 시스템에서 장치 대 장치 단말의 디스커버리 신호 전송 방법 및 장치 |
| JP2016556800A JP6702634B2 (ja) | 2014-03-11 | 2015-03-11 | 無線通信システムにおいて装置対装置端末のディスカバリ信号伝送方法及び装置 |
| CN201580012739.7A CN106105056B (zh) | 2014-03-11 | 2015-03-11 | D2d用户设备在通信系统中发送发现信号的方法和设备 |
| US16/906,357 US11064546B2 (en) | 2014-03-11 | 2020-06-19 | Method and apparatus for device-to-device user equipment to transmit discovery signal in wireless communication system |
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461950842P | 2014-03-11 | 2014-03-11 | |
| US61/950,842 | 2014-03-11 | ||
| US201461994109P | 2014-05-15 | 2014-05-15 | |
| US61/994,109 | 2014-05-15 | ||
| US201462031155P | 2014-07-30 | 2014-07-30 | |
| US62/031,155 | 2014-07-30 | ||
| US201462033639P | 2014-08-05 | 2014-08-05 | |
| US62/033,639 | 2014-08-05 |
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| US15/124,936 A-371-Of-International US10897787B2 (en) | 2014-03-11 | 2015-03-11 | Method and apparatus for device-to-device user equipment to transmit discovery signal in wireless communication system |
| US16/906,357 Continuation US11064546B2 (en) | 2014-03-11 | 2020-06-19 | Method and apparatus for device-to-device user equipment to transmit discovery signal in wireless communication system |
Publications (1)
| Publication Number | Publication Date |
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| WO2015137720A1 true WO2015137720A1 (ko) | 2015-09-17 |
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| PCT/KR2015/002347 Ceased WO2015137720A1 (ko) | 2014-03-11 | 2015-03-11 | 무선 통신 시스템에서 장치 대 장치 단말의 디스커버리 신호 전송 방법 및 장치 |
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| Country | Link |
|---|---|
| US (2) | US10897787B2 (ko) |
| EP (1) | EP3119012B1 (ko) |
| JP (1) | JP6702634B2 (ko) |
| KR (1) | KR102378132B1 (ko) |
| CN (1) | CN106105056B (ko) |
| WO (1) | WO2015137720A1 (ko) |
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| WO2017032701A1 (en) * | 2015-08-24 | 2017-03-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of adapting radio resources, device and computer program |
| US20190059006A1 (en) * | 2016-02-25 | 2019-02-21 | Lg Electronics Inc. | Method for performing measurement and device using same |
| CN107666681B (zh) * | 2016-07-29 | 2022-08-26 | 北京三星通信技术研究有限公司 | 传输数据的方法及设备 |
| JP2018191130A (ja) | 2017-05-02 | 2018-11-29 | ソニー株式会社 | 通信装置及び通信方法 |
| US20200204971A1 (en) * | 2017-07-03 | 2020-06-25 | Ntt Docomo, Inc. | User apparatus and transmission method |
| WO2019022443A1 (ko) * | 2017-07-28 | 2019-01-31 | 엘지전자 주식회사 | 무선통신시스템에서 단말이 자원을 선택하고 신호를 전송하는 방법 및 장치 |
| WO2019075653A1 (en) | 2017-10-18 | 2019-04-25 | Lenovo (Beijing) Limited | DETERMINATION OF A DISCOVERY ANNOUNCEMENT GROUP |
| WO2019093783A1 (ko) * | 2017-11-08 | 2019-05-16 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말에 의해 수행되는 레인징 응답 신호 전송 방법 및 상기 방법을 이용하는 단말 |
| CN110740511A (zh) * | 2018-07-18 | 2020-01-31 | 普天信息技术有限公司 | 非正交多址接入资源池的配置方法和系统 |
| KR102165806B1 (ko) * | 2018-08-16 | 2020-10-14 | 에스케이텔레콤 주식회사 | 전송장치 및 전송장치의 동작 방법 |
| US11723046B2 (en) * | 2018-09-25 | 2023-08-08 | Asustek Computer Inc. | Method and apparatus of deriving feedback resource for sidelink transmission in a wireless communication system |
| CA3097223C (en) | 2018-10-12 | 2023-02-21 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method, terminal equipment and network equipment for repeatedly transmitting information |
| US11018707B2 (en) | 2019-03-29 | 2021-05-25 | Qualcomm Incorporated | Adaptive gain control for sidelink communications |
| US11882554B2 (en) | 2019-06-27 | 2024-01-23 | Qualcomm Incorporated | Opportunistic transmission for sidelink communications |
| CN113747553B (zh) * | 2021-07-30 | 2022-09-09 | 荣耀终端有限公司 | 一种上行传输资源调度方法、基站、用户设备及通信系统 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130059583A1 (en) * | 2010-03-23 | 2013-03-07 | Vinh Van Phan | Resource Allocation for Direct Terminal-to-Terminal Communication in a Cellular System |
| US20130109301A1 (en) * | 2011-11-02 | 2013-05-02 | Renesas Mobile Corporation | D2D Discovery Process |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6873662B2 (en) | 2002-02-14 | 2005-03-29 | Interdigital Technology Corporation | Wireless communication system having adaptive threshold for timing deviation measurement and method |
| KR100698125B1 (ko) * | 2005-06-28 | 2007-03-26 | 엘지전자 주식회사 | 간섭 제거 방법과, 그를 위한 통신단말기 |
| JP5222793B2 (ja) * | 2009-06-05 | 2013-06-26 | 株式会社日立製作所 | 無線通信システム、基地局及び端末 |
| KR101896001B1 (ko) * | 2011-07-12 | 2018-09-06 | 한국전자통신연구원 | 이종 네트워크 환경에서 단말의 이동성 관리 방법 |
| US8812680B2 (en) | 2011-09-14 | 2014-08-19 | Qualcomm Incorporated | Methods and apparatus for peer discovery interference management in a wireless wide area network |
| US8750167B2 (en) * | 2011-10-28 | 2014-06-10 | Freescale Semiconductor, Inc. | Transmit power control techniques for nodes in an ad-hoc network |
| KR20130063615A (ko) * | 2011-12-07 | 2013-06-17 | 한국전자통신연구원 | 셀룰러 이동통신 시스템 기반의 디바이스 투 디바이스 통신을 위한 통신 자원 제어 방법 |
| GB2501088B (en) | 2012-04-11 | 2014-11-12 | Broadcom Corp | Methods and apparatus for transmitting and/or controlling device-to-device discovery signals |
| US9154267B2 (en) * | 2012-07-02 | 2015-10-06 | Intel Corporation | Sounding reference signal (SRS) mechanism for intracell device-to-device (D2D) communication |
| EP2892287B1 (en) | 2012-08-28 | 2017-10-04 | KYOCERA Corporation | Base station, user terminal, and processor |
| US9247508B2 (en) * | 2012-09-28 | 2016-01-26 | Sharp Kabushiki Kaisha | Transmission power control for signals used by user equipment terminals for device-to-device services |
| US11496948B2 (en) * | 2012-10-19 | 2022-11-08 | Samsung Electronics Co., Ltd. | System and method for ad-hoc/network assisted device discovery protocol for device to device communications |
| US9408137B2 (en) * | 2012-10-22 | 2016-08-02 | Electronics And Telecommunications Research Institute | Discovery signal transmitted in direct communication system, and method of transmitting/receiving the discovery signal |
| US9143291B2 (en) * | 2012-12-27 | 2015-09-22 | Google Technology Holdings LLC | Method and apparatus for device-to-device communication |
| EP3709730A1 (en) * | 2013-01-16 | 2020-09-16 | Interdigital Patent Holdings, Inc. | Discovery signal generation and reception |
| EP2950595B1 (en) * | 2013-01-24 | 2019-07-31 | LG Electronics Inc. | Method for controlling transmission power of discovery signal for device-to-device communication in wireless communication system and device for same |
| US9949286B2 (en) * | 2013-04-26 | 2018-04-17 | Telefonaktiebolaget L M Ericsson (Publ) | Method and network efficiency node for increased data throughput in wireless networks |
| CN105493417B (zh) * | 2013-07-26 | 2018-11-09 | Lg 电子株式会社 | 发送用于mtc的信号的方法及其设备 |
| CN110933658B (zh) * | 2014-01-29 | 2022-11-15 | 交互数字专利控股公司 | 用于设备到设备发现或通信的资源选择 |
| JP6364196B2 (ja) | 2014-01-30 | 2018-07-25 | 株式会社Nttドコモ | ユーザ端末、無線基地局、無線通信システム及び無線通信方法 |
-
2015
- 2015-03-11 CN CN201580012739.7A patent/CN106105056B/zh active Active
- 2015-03-11 US US15/124,936 patent/US10897787B2/en active Active
- 2015-03-11 JP JP2016556800A patent/JP6702634B2/ja active Active
- 2015-03-11 EP EP15760872.0A patent/EP3119012B1/en active Active
- 2015-03-11 WO PCT/KR2015/002347 patent/WO2015137720A1/ko not_active Ceased
- 2015-03-11 KR KR1020167027071A patent/KR102378132B1/ko active Active
-
2020
- 2020-06-19 US US16/906,357 patent/US11064546B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130059583A1 (en) * | 2010-03-23 | 2013-03-07 | Vinh Van Phan | Resource Allocation for Direct Terminal-to-Terminal Communication in a Cellular System |
| US20130109301A1 (en) * | 2011-11-02 | 2013-05-02 | Renesas Mobile Corporation | D2D Discovery Process |
Non-Patent Citations (4)
| Title |
|---|
| ALCATEL -LUCENT SHANGHAI BELL ET AL.: "D2D discovery channel design", RL-140175, 3GPP TSG RAN WG1 MEETING #76, 1 February 2014 (2014-02-01), Prague, Czech Republic, XP050735736 * |
| CATT: "Further discussion on resource allocation for D2D discovery", RL-140098, 3GPP TSG RAN WG1 MEETING #76, 31 January 2014 (2014-01-31), Prague, Czech Republic, XP050735664 * |
| HUAWEI ET AL.: "Resource allocation for type-1 discovery", R1-135046, 3 GPP TSG RAN WG1 MEETING #75, 2 November 2013 (2013-11-02), San Francisco, USA, XP050734749 * |
| See also references of EP3119012A4 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018191333A (ja) * | 2015-05-15 | 2018-11-29 | 京セラ株式会社 | 基地局及び無線端末 |
| WO2017078477A1 (ko) * | 2015-11-04 | 2017-05-11 | 엘지전자 주식회사 | 무선 통신 시스템에서 v2x 단말의 데이터 송신 방법 및 장치 |
| US11696325B2 (en) | 2016-02-05 | 2023-07-04 | Huawei Technologies Co., Ltd. | Control signaling transmission method and device |
| JP2020058078A (ja) * | 2016-02-05 | 2020-04-09 | 華為技術有限公司Huawei Technologies Co.,Ltd. | 制御シグナリング送信の方法及びデバイス |
| CN108605337A (zh) * | 2016-02-05 | 2018-09-28 | 华为技术有限公司 | 一种传输控制信令的方法及设备 |
| CN107295496B (zh) * | 2016-04-13 | 2019-12-20 | 普天信息技术有限公司 | 载波间终端直通d2d发现资源冲突的处理方法和装置 |
| CN107295496A (zh) * | 2016-04-13 | 2017-10-24 | 普天信息技术有限公司 | 载波间终端直通d2d发现资源冲突的处理方法和装置 |
| JP2019515612A (ja) * | 2016-05-12 | 2019-06-06 | 華為技術有限公司Huawei Technologies Co.,Ltd. | 情報送信方法及びユーザ装置 |
| KR20180137547A (ko) * | 2016-05-12 | 2018-12-27 | 후아웨이 테크놀러지 컴퍼니 리미티드 | 정보 전송 방법 및 사용자 장비 |
| KR102142256B1 (ko) | 2016-05-12 | 2020-08-07 | 후아웨이 테크놀러지 컴퍼니 리미티드 | 정보 전송 방법 및 사용자 장비 |
| US11018800B2 (en) | 2016-05-12 | 2021-05-25 | Huawei Technologies Co., Ltd. | Information transmission method and user equipment |
| WO2017222351A1 (ko) * | 2016-06-24 | 2017-12-28 | 엘지전자 주식회사 | 무선 통신 시스템에서 v2x 통신을 위한 신호 전송 방법 및 이를 위한 장치 |
| US11122542B2 (en) | 2016-06-24 | 2021-09-14 | Lg Electronics Inc. | Signal transmission method for V2X communication in wireless communication system, and device therefor |
| JP2019534585A (ja) * | 2016-09-29 | 2019-11-28 | オッポ広東移動通信有限公司 | 情報伝送方法、ネットワーク機器および端末機器 |
| KR20210092819A (ko) * | 2018-11-27 | 2021-07-26 | 비보 모바일 커뮤니케이션 컴퍼니 리미티드 | 자원 배제 방법 및 단말 |
| KR102694776B1 (ko) | 2018-11-27 | 2024-08-14 | 비보 모바일 커뮤니케이션 컴퍼니 리미티드 | 자원 배제 방법 및 단말 |
| CN110856230A (zh) * | 2019-11-13 | 2020-02-28 | 维沃移动通信有限公司 | 一种网络切换方法及电子设备 |
| CN110856230B (zh) * | 2019-11-13 | 2021-06-04 | 维沃移动通信有限公司 | 一种网络切换方法及电子设备 |
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| US20200323003A1 (en) | 2020-10-08 |
| CN106105056B (zh) | 2019-07-12 |
| KR20160133474A (ko) | 2016-11-22 |
| EP3119012A4 (en) | 2017-12-13 |
| KR102378132B1 (ko) | 2022-03-24 |
| US20170027011A1 (en) | 2017-01-26 |
| US11064546B2 (en) | 2021-07-13 |
| EP3119012B1 (en) | 2020-04-29 |
| JP6702634B2 (ja) | 2020-06-03 |
| JP2017514346A (ja) | 2017-06-01 |
| US10897787B2 (en) | 2021-01-19 |
| EP3119012A1 (en) | 2017-01-18 |
| CN106105056A (zh) | 2016-11-09 |
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