WO2014109509A1 - Procédé et dispositif d'identification de type de porteuse de liaison descendante - Google Patents

Procédé et dispositif d'identification de type de porteuse de liaison descendante Download PDF

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Publication number
WO2014109509A1
WO2014109509A1 PCT/KR2014/000027 KR2014000027W WO2014109509A1 WO 2014109509 A1 WO2014109509 A1 WO 2014109509A1 KR 2014000027 W KR2014000027 W KR 2014000027W WO 2014109509 A1 WO2014109509 A1 WO 2014109509A1
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Prior art keywords
carrier
signal
identifying
control channel
nct
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PCT/KR2014/000027
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English (en)
Korean (ko)
Inventor
노민석
최우진
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KT Corp
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KT Corp
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Priority claimed from KR1020130109420A external-priority patent/KR20140091437A/ko
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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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT

Definitions

  • the present invention relates to a method and apparatus for identifying a carrier type, and more particularly, to a method for a terminal and a base station to identify a new carrier type (New Carrier Type).
  • LTE Long Term Evolution
  • LTE-Advanced of the current 3GPP series are high-speed and large-capacity communication systems that can transmit and receive various data such as video and wireless data beyond voice-oriented services.
  • the development of technology capable of transferring large amounts of data is required.
  • As a method for transmitting a large amount of data data can be efficiently transmitted using a plurality of cells.
  • the present invention to solve the above problems It provides the ability to identify a new carrier type to distinguish it from an existing legacy carrier type.
  • the present invention reduces the blind decoding or power consumption of the terminal and makes it possible to identify a new carrier type.
  • a method for configuring a base station to identify a type of a downlink carrier includes generating a signal for identifying a carrier that does not include a physical downlink control channel, and in the carrier And transmitting the signal to the terminal.
  • a method for identifying a type of a downlink carrier by a terminal includes: receiving, by a terminal, a signal identifying a carrier that does not include a physical downlink control channel from a base station; and Identifying a signal identifying a carrier and receiving a downlink signal from the carrier.
  • a base station configured to identify a type of downlink carrier is a control unit for generating a signal for identifying a carrier that does not include a physical downlink control channel (Physical Downlink Control CHannel), and the signal in the carrier It includes a transmitter for transmitting to the terminal.
  • Physical Downlink Control CHannel Physical Downlink Control CHannel
  • a terminal for identifying a type of downlink carrier is a receiver for receiving a signal identifying a carrier that does not include a downlink control channel (Physical Downlink Control CHannel) from the base station, and identifying the carrier And a controller configured to check a signal and control the receiver to receive a downlink signal from the carrier.
  • a downlink control channel Physical Downlink Control CHannel
  • the new carrier type can be identified to be distinguished from the existing legacy carrier type.
  • the blind decoding or power consumption of the terminal can be reduced and a new carrier type can be identified.
  • FIG. 1 shows a frame structure of PSS and SSS, which are synchronization signals in FDD and TDD systems.
  • FIG. 2 illustrates a method of avoiding collision of the PSS / SSS and the DM-RS by moving the position of the PSS / SSS as an example.
  • FIG. 3 illustrates a method of moving each PSS / SSS to another symbol to avoid collision with another channel and signal as another example.
  • FIG. 4 illustrates a method of puncturing a DM-RS in which a collision occurs when a PSS / SSS collides with a DMRS.
  • FIG. 5 is a diagram illustrating NCT by direct signaling according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating NCT by a code point according to another embodiment of the present invention.
  • FIG. 7 is a diagram for setting an interval of PSS / SSS to indicate an NCT carrier in case of FDD according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating an interval of PSS / SSS to indicate an NCT carrier in the case of TDD according to an embodiment of the present invention.
  • FIG 9 illustrates a case where the time positions of the PSS and the SSS are changed according to an embodiment of the present invention.
  • FIG. 10 is a diagram for identifying an NCT carrier by transmitting SSS / PSS in a second / third OFDM symbol in subframes # 0 and # 5 according to an embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a process of identifying a type of a downlink carrier by a base station according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating a process of identifying, by a terminal, a type of a downlink carrier according to another embodiment of the present invention.
  • FIG. 13 is a diagram illustrating a configuration of a base station according to another embodiment.
  • FIG. 14 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a comprehensive concept of a terminal in wireless communication.
  • UE user equipment
  • LTE Long Term Evolution
  • HSPA High Speed Packet Access
  • MS Mobile Station
  • UT User Terminal
  • SS Global System for Mobile communications
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Base Transceiver System Access Point, Relay Node, Remote Radio Head, RRH, Radio Unit, Transmission Point, TP, Reception Point, RP, etc. It may be called in other terms.
  • a base station or a cell is a generic meaning indicating some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU communication range.
  • BSC base station controller
  • the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station.
  • the eNB, RRH, antenna, RU, LPN, point, transmit / receive point, transmit point, receive point, etc. become embodiments of the base station according to the configuration of the radio region.
  • the base station may indicate the radio area itself to receive or transmit a signal from the viewpoint of the user terminal or the position of a neighboring base station.
  • megacells, macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmit and receive points, transmit points, and receive points are collectively referred to the base station.
  • LPNs low power nodes
  • eNBs transmit and receive points, transmit points, and receive points
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-Advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB.
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • Uplink and downlink transmit control information through control channels such as Physical Downlink Control CHannel (PDCCH), Physical Control Format Indicator CHannel (PCFICH), Physical Hybrid ARQ Indicator CHannel (PHICH), and Physical Uplink Control CHannel (PUCCH).
  • a data channel is configured such as PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel) and the like to transmit data.
  • control information can also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • an eNB a base station or a macro cell
  • a high transmission power or a low transmission power in a macro cell region which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, and a PDSCH.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through a PDCCH may be used to mean transmitting or receiving an EPDCCH or transmitting or receiving a signal through an EPDCCH.
  • a new carrier type is a carrier that does not include the PDCCH, or indicates a carrier that may optionally include the EPDCCH.
  • the new carrier type includes all carriers different from legacy carriers and having different control channel configurations.
  • a carrier distinguished from a legacy carrier is indicated as NCT (carrier that is a New Carrier Type), a new type of carrier, a new carrier type, or abbreviated as NCT.
  • high layer signaling described herein includes, but is not limited to, RRC signaling for transmitting RRC information including an RRC parameter.
  • An eNB which is an embodiment of a base station, performs downlink transmission to terminals.
  • the eNB includes downlink control information and uplink data channels (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required for reception of the PDSCH).
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • FIG. 1 shows a frame structure of a primary sync signal (PSS) and a secondary sync signal (SSS), which are synchronization signals in FDD and TDD systems.
  • PSS and SSS are transmitted in subframes 0 and 5 within one frame (10ms), and the last of the first slot in subframes 0 and 5 respectively.
  • the PSS is transmitted to the symbol, and the SSS is transmitted to the second last symbol of the first slot preceded by one symbol.
  • a PSS in a TDD system is transmitted in a third OFDM symbol of subframe # 1 and subframe # 6 configured as DwPTS, and the SSS is subframe # 0 and subframe # configured as DL subframes. It is transmitted in the last OFDM symbol of five.
  • the interval between symbols of PSS and SSS on the TDD system is 3 OFDM symbols.
  • the new carrier type is an additional carrier introduced as a method for increasing data rate in a carrier aggregation (CA), small cell, or CoMP scenario. When introduced, it is necessary to coordinate with the operation of conventional legacy systems.
  • the method for downlink channel and signal transmission in NCT is as follows.
  • the downlink cell specific reference signal performs only one antenna port CRS transmission having a period of 5 ms.
  • DM-RS Demodulation Reference Signal
  • the sequence used for PSS / SSS reuses the sequence used for conventional (for example Rel-8).
  • PSS / SSS is transmitted for unsynchronized carriers.
  • the PDSCH transmission in the NCT cannot perform demodulation with the CRS, and the demodulation must be performed with the DL DM-RS. Therefore, in the NCT transmitting the PSS / SSS, the DM-RS and PSS / Collision of the SSS may occur. That is, in the case of subframe # 0 and subframe # 5 where PSS / SSS is transmitted, when PDSCH is transmitted to 6RB in the center of system bandwidth (BW), transmission of PSS / SSS and collision with DL DM-RS occur. do.
  • the collision between the PSS / SSS and the DL DM-RS can be resolved as follows.
  • the relative position of the PSS / SSS conventionally used (for example, Rel-8) is maintained as it is.
  • the position of the SSS / PSS may be moved to the second or third symbol.
  • the position of the SSS / PSS may be moved to the third and fourth symbols.
  • the second method of position shifting is a method for changing the relative position of a conventionally used PSS / SSS. That is, in the case of FDD, the synchronization signal allocated in the order of SSS / PSS at intervals of 1 symbol may be increased by 2 to 5 symbol spacing. As shown in FIG. 3, four symbol spacings are performed between the SSS and the PSS. It is also possible to switch the symbol position of the PSS and SSS, and the PSS / SSS assigned to the first and second last symbols of the first slot of subframe # 0 and subframe # 5 respectively. Can be moved to another symbol to avoid collision with other channels and signals. In this case, it may be moved to the second / third symbol, to the second / fourth symbol, or to the third / fourth symbol.
  • the PSS / SSS transmitted in the NCT uses the same PSS / SSS in the same way and newly defines a DM-RS pattern in the NCT in order to avoid a collision between the PSS and the DM-RS.
  • the PSS / SSS collides with the DM-RS it may be set to puncture the DM-RS where the collision occurs.
  • 4 is a diagram illustrating an example in which a signal of a DM-RS is punctured.
  • the PSS / SSS and the DM-RS may limit the scheduling to avoid collisions.
  • Physical resource blocks (PSBs) having PSS / SSS are configured not to perform PDSCH transmission (Forbid PDSCH transmissions in PRBs with PSS / SSS).
  • Case-A as shown below occurs when applying (i-1), (i-2), or (i-3), which can be used to resolve the conflict between PSS / SSS and DM-RS.
  • the legacy and Rel-12 terminals may not recognize whether the corresponding carrier is a legacy carrier or an NCT carrier upon detection by the corresponding synchronization signal.
  • the symbol spacing is divided into a case where the PSS / SSS symbol position is maintained again (DM-RS puncturing or a change of the DM-RS position) and a case where the PSS / SSS symbol position is shifted in time (time shifted). Lose.
  • the transmission of the PSS / SSS in the frame structure of the PSS / SSS which is a signal transmitted from the base station, when the legacy and Rel-12 UEs detect the corresponding PSS and SSS, is transmitted in the legacy legacy carrier and in the NCT. Since the transmission of PSS / SSS to be transmitted is FDD in the frame structure, the SSS has a structure of 1 OFDM symbol preceding PSS, and in the case of TDD, SSS has a structure of 3 OFDM symbols preceding PSS. The UE and the Rel-12 UE cannot recognize whether the corresponding carrier is a legacy carrier or an NCT upon detection by the synchronization signal.
  • case-B occurs as follows in (i-1), (i-2), or (i-3), which can be used to resolve a conflict between the PSS / SSS and the DM-RS
  • the legacy terminal and the Rel-12 terminal may recognize whether the carrier is a legacy carrier or an NCT when detected by the corresponding synchronization signal, but the access procedure uses the procedure used in Rel-8 / 9/10/11. It should be greatly changed, and the terminal should perform a cell search (cell search) to select a cell by using a different method.
  • cell search cell search
  • Case-B refers to a case of changing the relative symbol position and spacing of the PSS / SSS.
  • the present invention proposes an identification method of NCT or a method for distinguishing legacy carriers from NCT in case Case-A and Case-B occur.
  • a method and apparatus for identifying a new carrier under a small cell, carrier aggregation (CA), or CoMP scenario will be described.
  • the present invention relates to a method and apparatus for identifying a carrier which is an NCT in a small cell, CA (carrier aggregation) or CoMP scenario, and a method for setting at a base station or a signal transmission method from a base station, and a related terminal.
  • the present invention relates to a terminal receiving method and apparatus thereof for recognition.
  • a carrier type identification method for explicitly or implicitly identifying either a legacy carrier type or an NCT in a cell search procedure will be described.
  • This method adds a small signaling overhead or performs an access procedure for NCT through indirect signaling.
  • a method of reducing the power consumption of the terminal due to a plurality of blind decoding operations when the access procedure is performed in the terminal the following procedure is performed. The same specific method may be considered.
  • a parameter for new carrier identification may be added to a master information block (MIB) or a broadcast control channel (BCH). That is, by adding a new field to the MIB or BCH, after detecting the corresponding MIB or BCH, the UE can identify whether the carrier that the UE performed the access procedure is NCT.
  • MIB master information block
  • BCH broadcast control channel
  • FIG. 5 is a diagram illustrating NCT by direct signaling according to an embodiment of the present invention.
  • 510 and 520 of FIG. 5 show the configuration of the MIB transmitted on the BCH.
  • operation 510 which is an embodiment of configuring an information element called MasterInformationBlock, a field “spare” is included.
  • the dl-Bandwidth fields of 510 and 520 indicate transmission bandwidth settings.
  • the systemFrameNumber field defines the most significant 8 bits of a system frame number (SFN).
  • SFN system frame number
  • one of the reserved bits in the “spare” field of 510 is set as an nct-identifier which is a new carrier identifier for indicating a corresponding NCT. Can be.
  • the size of the "spare” field of 510 is 9, and one bit excluded from the "spare” field constitutes the "nct-identifier" field.
  • the terminal may identify whether the carrier is a legacy carrier or an NCT using the information in the “nct-identifier” field.
  • the spare field of 510 may be used as it is, but a bit of a specific position of the “spare” field may be used as a field indicating NCT. For example, if the first bit of the "spare” field is 1, if the carrier is implemented to indicate that the NCT, the terminal may identify the NCT carrier when the "spare" field of the transmitted MasterInformationBlock is "1000000000".
  • the identification method may be considered as a method of performing new carrier identification (NCT) while still using a synchronization signal transmission method used by a legacy base station or a legacy carrier for the structure of the PSS / SSS.
  • NCT new carrier identification
  • the computing complexity (computational complexity) of the terminal for the detection of the PSS / SSS in the terminal may have an advantage that does not increase, which can solve the problem of power consumption mainly occurring in the LTE terminal with the introduction of NCT Can be considered as a method.
  • Embodiment 1-2 As an indirect signaling method, a method of identifying an NCT using a code point remaining in the MIB or the BCH may be considered. That is, a method that can be used as an identifier for the NCT using a code point remaining in the number of bits indicated by dl-bandwidth of the MasterInformationBlock of FIG. 5 may be considered. That is, if the number of bits specified from the dl-bandwidth in the MIB is specified as 3 bits, there are currently two states besides ⁇ 6, 15, 25, 50, 75, 100 ⁇ . It can be specified additionally. Therefore, the two remaining states can be used to identify the NCT.
  • the frequency bandwidth usable by NCT is equal to the bandwidth corresponding to x-RB and y-RB. If the MIB indicates a state representing the corresponding nct_x and nct_y in the MIB, the terminal can recognize that the corresponding carrier is the NCT carrier, thereby indirectly and explicitly identifying the NCT. .
  • FIG. 6 is a diagram illustrating NCT by a code point according to another embodiment of the present invention.
  • n6 and nct_n6 indicate a 1.4 MHz bandwidth (six RBs), but the carrier can be identified as a legacy type when n6 and an NCT type when nct_n6.
  • a transmission bandwidth setting value may be indicated differently for a legacy carrier and an NCT carrier.
  • n6 in Table 1 means 6 and n15 means 15, nct_n6 may be set to 6 and nct_n15 may be set to 15, and the value may be configured as a code point to indicate the channel bandwidth of the NCT carrier.
  • the NCT can be identified using the remaining two states. You can include nct_x and nct_y (where x and y are set to different values) for the two remaining states.
  • the frequency bandwidth that can be used by the NCT is the bandwidth corresponding to the x-RB and the bandwidth corresponding to the y-RB, and when the state indicating the corresponding nct_x and nct_y is indicated in the MIB, the corresponding carrier is the NCT carrier.
  • EDL may be defined as ENUMERATED ⁇ n6, n15, n25, n50, n75, n100, nct_x, nct_y ⁇ in dl-bandwidth.
  • the NCT identification method through the implicit indication is an embodiment which does not add additional signaling overhead.
  • a specific method as follows may be considered as a method of setting not to increase latency.
  • a carrier that is an NCT may be identified by distinguishing a synchronization signal, that is, a time difference between a PSS and an SSS. That is, the OFDM signal intervals between the PSS and the SSS as synchronization signals transmitted to synchronize downlinks from the legacy legacy base station and the legacy carrier to the UE are as follows.
  • the SSS is set to be transmitted in the symbol immediately preceding the symbol in which the PSS is transmitted.
  • the symbol interval between the PSS and the SSS is set to one OFDM symbol interval.
  • the carrier receiving the PSS / SSS is synchronized by setting the interval between the PSS and the SSS to be 2 OFDM symbol intervals or 3 OFDM symbol intervals different from the previously set 1 OFDM symbol interval for identification of carriers that are NCT. Recognize that the type of is NCT.
  • FIG. 7 is a diagram illustrating an NCT carrier according to an OFDM symbol interval difference of PSS / SSS in case of FDD according to an embodiment of the present invention.
  • the PSS / SSS of the downlink DM-RS and the CSI-RS can avoid collisions with the transmitted symbols.
  • the setting of the interval can be reflected.
  • the PSS is transmitted in the third OFDM symbol of subframe # 1 and subframe # 6 configured as DwPTS
  • the SSS is subframe # configured as a downlink subframe. It is transmitted in 0 and the last OFDM symbol of subframe # 5. That is, the symbol interval between the PSS and the SSS is set to three OFDM symbol intervals.
  • the terminal receiving the corresponding PSS / SSS in the NCT carrier is configured by transmitting the PSS and the SSS interval at 1 OFDM symbol interval or 2 OFDM symbol interval different from the previously set 3 OFDM symbol interval for identification of the NCT carrier. Recognize that the type of carrier that is synchronized is NCT.
  • FIG. 8 is a diagram illustrating an NCT carrier indicated by a difference in OFDM symbol intervals of a PSS / SSS in a TDD according to an embodiment of the present invention.
  • the setting of the interval of PSS / SSS to avoid collision with a symbol in which downlink DM-RS and CSI-RS are transmitted is reflected. can do.
  • the synchronization signal that is, the time location of the PSS and the SSS is set to be transmitted in a different manner and transmitted in a structure different from the structure of the PSS / SSS transmitted from the legacy legacy base station or operated from the legacy carrier.
  • the time position of the PSS / SSS operating from the legacy legacy base station and the legacy carrier is used in the FDD and TDD structures in the form of a structure followed by the PSS and preceded by the SSS.
  • the PSS is set to be preceded and the SSS is set to be transmitted so that the carrier can be identified by the NCT according to a different setting from the transmission from the legacy legacy base station or the legacy carrier.
  • FIG 9 illustrates a case where the time positions of the PSS and the SSS are changed according to an embodiment of the present invention.
  • the NCT carrier in the FDD system is configured to be preceded by the PSS and trailed by the SSS.
  • the NCT carrier in the TDD system is configured such that the PSS is preceded and the SSS is followed.
  • Embodiment 2-3 It is different from the structure of PSS / SSS which is transmitted from legacy base station or operated by legacy carrier by setting to transmit the synchronization signal, that is, the position within the subframe of time position of PSS and SSS.
  • the identification of the NCT carriers can be performed by allowing transmission to the structure. In other words.
  • the time position of the PSS / SSS operating from the legacy legacy base station and legacy carrier is that the PSS is transmitted in the first OFDM symbol of the second slot in subframes # 0 and # 5, and the SSS is the first in subframes # 0 and # 5.
  • the last OFDM symbol of the first slot is transmitted, and the structure used in the legacy is transmitted in subframes # 0 and # 5, and the structure in which the PSS follows the SSS is maintained, but in subframes # 0 and # 5 It is set to be transmitted in another OFDM symbol.
  • FIG. 10 is a diagram for identifying an NCT carrier by transmitting SSS / PSS in a second / third OFDM symbol in subframes # 0 and # 5 according to an embodiment of the present invention.
  • 1010 shows an embodiment in which an SSS is transmitted in a second OFDM symbol of subframes # 0 and # 5 in FDD and a PSS is transmitted in a third OFDM symbol. This may be considered as a way to enable the carrier to be identified by the NCT according to a setting different from the transmission from the legacy legacy base station or legacy carrier.
  • Embodiment 2-4 A method using CRS blind detection.
  • the UE identifies the NCT by using a difference between the configuration of the CRS transmitted to the legacy carrier and the configuration of the CRS transmitted to the NCT.
  • CRSs in legacy carriers are transmitted throughout each system bandwidth in every subframe, and the configuration of CRSs transmitted to NCT is not transmitted over the entire system bandwidth with a period of 5 ms, but rather a specific bandwidth (e.g., For example, since the CRS is transmitted only to the central 6RB or 25RB or a set number of RB areas), the NCT can be identified by blind detection of the UE according to the configuration of different CRSs for the two carriers in the UE. .
  • the NCT is identified by blind detection of the terminal according to the configuration of the two CRSs. can do.
  • the complexity can be greatly reduced. That is, blind detection of each PSS and SSS needs to be performed for increasing blind detection for cell color combining, and cell searching for FDD and TDD cells for a UE in multiple modes of FDD and TDD. Since each must be performed, the complexity of the terminal is greatly increased.
  • identifying the NCT by blind detection according to the configuration of the CRS can reduce complexity since the NCT can be identified by a total of two blind detections, one for the configuration of the CRS used in the legacy carrier and one for the CRS used in the NCT. There is an advantage in that.
  • the base station generates a signal for identifying a carrier that does not include a physical downlink control channel (S1110), and transmits the signal from the carrier to the terminal (S1120).
  • the control channel may include only the PDCCH, not the enhanced or extended Physical Downlink Control CHannel (EPDCCH).
  • the identifying signal may be a signal including the identifying information in a master information block (MIB) or a broadcast control channel (BCH) described in FIG. 5 or FIG. 6 in an explicit signaling scheme as the first embodiment.
  • the identifying signal may be a time position of at least two synchronization signals or at least two or more synchronization signals as described above with reference to FIGS. It can be identified according to the time difference between the synchronization signals. Two or more synchronization signals are PSS and SSS, it can be confirmed that the carrier is a carrier of the NCT by configuring the difference or relative position of the symbol between the PSS and SSS, or the position of the PSS / SSS signal different from the conventional.
  • the identifying signal may be configured to include a CRS having a configuration different from that of a cell-specific reference signal (CRS) transmitted in a time and frequency domain excluding the carrier.
  • CRS cell-specific reference signal
  • the terminal receives a signal from the base station identifying a carrier that does not include a physical downlink control channel (S1210), and checks the signal identifying the carrier to receive a downlink signal from the carrier (S1220).
  • the control channel may include only the PDCCH, not the enhanced or extended Physical Downlink Control CHannel (EPDCCH).
  • the identifying signal may be a signal including the identifying information in a master information block (MIB) or a broadcast control channel (BCH) described in FIG. 5 or FIG. 6 in an explicit signaling scheme as the first embodiment. Accordingly, the terminal confirms that the MIB or BCH includes the information as shown in FIGS. 5 and 6 and confirms that the corresponding carrier is an NCT carrier.
  • the identifying signal may be a time position of at least two synchronization signals or at least two or more synchronization signals as described above with reference to FIGS. It can be identified according to the time difference between the synchronization signals.
  • the two or more synchronization signals are PSS and SSS, and the difference or relative position of a symbol between the PSS and the SSS, or the position of the PSS / SSS signal is configured differently from the prior art.
  • the terminal may confirm that the PSS / SSS is different from the conventional one and confirm that the corresponding carrier is a carrier of NCT.
  • the identifying signal may be configured to include a CRS having a configuration different from that of a cell-specific reference signal (CRS) transmitted in a time and frequency domain excluding the carrier. In this case, when the configuration of the CRS received by the carrier is different from the configuration of the CRS in another frequency domain, the terminal may identify the carrier as an NCT carrier.
  • CRS cell-specific reference signal
  • the present invention may also include a base station operation and its apparatus configured to perform the operations of FIGS. 11 and 12, and a reception operation of the related terminal and the apparatus.
  • a cell selection procedure of a UE used in a legacy legacy carrier is solved by solving a problem in which NCT cannot be recognized in a UE that may occur when an NCT is introduced under a CA, a small cell, and a CoMP scenario. By using the same to do not need to change the operation of the existing terminal.
  • by performing the division of the legacy carrier and the NCT during the cell selection procedure it is possible to reduce the connection latency for the new terminal to access the NCT.
  • power consumption of the terminal can be reduced by reducing blind decoding at the terminal during cell search.
  • FIG. 13 is a diagram illustrating a configuration of a base station according to another embodiment.
  • the base station 1300 includes a controller 1310, a transmitter 1320, and a receiver 1330.
  • the control unit 1310 controls the operation of the overall base station that explicitly or implicitly identifies one of the legacy carrier type or the NCT during the cell discovery procedure, which is necessary to carry out the above-described present invention.
  • the transmitter 1320 and the receiver 1330 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.
  • control unit 1310 generates a signal for identifying a carrier that does not include a physical downlink control channel, and the transmitter 1320 transmits the signal to the terminal.
  • control channel may include only the PDCCH, not the enhanced or extended Physical Downlink Control CHannel (EPDCCH).
  • the identifying signal may be a signal including the identifying information in the MIB or the BCH described with reference to FIG. 5 or FIG. 6 in an explicit signaling scheme of the first embodiment.
  • the identifying signal may be a time position of at least two synchronization signals or at least two or more synchronization signals as described above with reference to FIGS. It can be identified according to the time difference between the synchronization signals.
  • the two or more synchronization signals may be PSS and SSS, and may be configured to be different from the symbol or relative position of the PSS and SSS, or the position of the PSS / SSS signal differently from the prior art, thereby confirming that the carrier is an NCT carrier.
  • the identifying signal may be configured to include a CRS having a configuration different from that of a cell-specific reference signal (CRS) transmitted in a time and frequency domain excluding the carrier.
  • CRS cell-specific reference signal
  • FIG. 14 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • a user terminal 1400 includes a receiver 1430, a controller 1410, and a transmitter 1420.
  • the receiver 1430 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • controller 1410 controls the overall operation of the terminal that explicitly or implicitly identifies one of the legacy carrier type or the NCT during the cell discovery procedure, which is required to perform the above-described present invention.
  • the transmitter 1420 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • the receiver 1430 receives a signal from a base station that identifies a carrier that does not include a physical downlink control channel, and the controller 1410 checks the signal identifying the carrier and the carrier.
  • the receiver 1430 controls the downlink signal to receive a downlink signal.
  • the control channel may include only the PDCCH, not the enhanced or extended Physical Downlink Control CHannel (EPDCCH).
  • the identifying signal may be a signal including the identifying information in a master information block (MIB) or a broadcast control channel (BCH) described in FIG. 5 or FIG. 6 in an explicit signaling scheme as the first embodiment. Accordingly, the control unit 1410 confirms that the MIB or BCH includes the information shown in FIGS. 5 and 6 and confirms that the carrier is the NCT carrier.
  • the identifying signal may be a time position of at least two synchronization signals or at least two or more synchronization signals as described above with reference to FIGS. It can be identified according to the time difference between the synchronization signals.
  • the two or more synchronization signals are PSS and SSS, and the difference or relative position of a symbol between the PSS and the SSS, or the position of the PSS / SSS signal is configured differently from the prior art.
  • the controller 1410 may confirm that the PSS / SSS is different from the conventional one and confirm that the corresponding carrier is a carrier of NCT.
  • the identifying signal may be configured to include a CRS having a configuration different from that of a cell-specific reference signal (CRS) transmitted in a time and frequency domain excluding the carrier. In this case, when the configuration of the CRS received by the carrier is different from the configuration of the CRS in another frequency domain, the controller 1410 may identify the carrier as an NCT carrier.
  • CRS cell-specific reference signal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif d'identification du type de porteuse de liaison descendante. Le procédé par lequel une station de base identifie le type de porteuse de liaison descendante selon un mode de réalisation de la présente invention comporte les étapes consistant : à générer un signal servant à identifier la porteuse dans laquelle un canal de commande de liaison descendante physique n'est pas inclus ; à permettre à la porteuse d'envoyer le signal à un terminal.
PCT/KR2014/000027 2013-01-11 2014-01-03 Procédé et dispositif d'identification de type de porteuse de liaison descendante Ceased WO2014109509A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR20130003661 2013-01-11
KR10-2013-0003661 2013-01-11
KR20130007307 2013-01-23
KR10-2013-0007307 2013-01-23
KR1020130109420A KR20140091437A (ko) 2013-01-11 2013-09-12 하향링크 캐리어의 타입을 식별하는 방법 및 장치
KR10-2013-0109420 2013-09-12

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011038252A2 (fr) * 2009-09-25 2011-03-31 Fong, Mo-Han Système et procédé de fonctionnement d'un réseau à porteuses multiples
US20120033627A1 (en) * 2009-04-29 2012-02-09 Zte Corporation Method for Sending and Detecting Downlink Control Information
KR20120021728A (ko) * 2010-08-13 2012-03-09 주식회사 팬택 채널정보 수신방법 및 전송 방법과 이를 이용하는 단말 및 기지국
US20120243498A1 (en) * 2009-12-07 2012-09-27 Yeong Hyeon Kwon Method and apparatus for transmitting and receiving a signal in a wireless communication system that supports plural component carriers

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US20120033627A1 (en) * 2009-04-29 2012-02-09 Zte Corporation Method for Sending and Detecting Downlink Control Information
WO2011038252A2 (fr) * 2009-09-25 2011-03-31 Fong, Mo-Han Système et procédé de fonctionnement d'un réseau à porteuses multiples
US20120243498A1 (en) * 2009-12-07 2012-09-27 Yeong Hyeon Kwon Method and apparatus for transmitting and receiving a signal in a wireless communication system that supports plural component carriers
KR20120021728A (ko) * 2010-08-13 2012-03-09 주식회사 팬택 채널정보 수신방법 및 전송 방법과 이를 이용하는 단말 및 기지국

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