KR20140116704A - Method and apparatus of supporting comp considering nct in wireless communication system - Google Patents

Abstract

The present invention relates to Coordinated MultiPoint (CoMP) support method and apparatus for a Cooperative Multipoint Point (CoMP) considering a NCT in a wireless communication system, and a base station according to the present invention performs CoMP operation for a UE with RRC A message processor for generating an RRC connection reestablishment message including CoMP configuration information, a transmitter for transmitting the generated RRC connection re-establishment message to the UE, and a RRC connection re-establishment corresponding to the RRC connection re- Wherein the RRC connection re-establishment message generated by the message processing unit includes a QCL of an antenna port peculiar to an NCT (New Carrier Type) cell connected to the UE according to the CoMP setting, quasi-co-location) relationship.

Description

Technical Field [0001] The present invention relates to a CoMP support method and an apparatus for supporting CoMP in a wireless communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wireless communication, and more particularly, to a Coordination Multi-Point (CoMP) supporting method and a device thereof in consideration of NCT (New Carrier Type) in a wireless communication system.

A multi-element carrier system refers to a wireless communication system capable of supporting carrier aggregation (CA). Carrier aggregation is a technique for efficiently using fragmented small bands. It has the same effect as using a logically large bands by bundling a plurality of physically continuous or non-continuous bands in the frequency domain. In order to make it possible.

However, the component carrier (CC) used in the existing LTE system emphasizes the general purpose of the physical layer, and there is still a control area overlap and a common signal overhead, so that the data area to be transmitted is reduced and spectral efficiency and there is an unnecessary loss in terms of efficiency. Accordingly, in order to efficiently operate the multi-carrier system, it is required to introduce a new carrier type (NCT: New Carrier Type) constituting a multi-carrier system. In the NCT, signaling for control signaling or channel estimation can be eliminated or reduced within a range in which there is no deterioration or minimization of performance as compared with a legacy carrier type (LCT: Legacy Carrier Type). Thus, the maximum data transmission efficiency can be obtained. The NCT cell using the NCT carrier may be included as a secondary serving cell (Scell) when the primary serving cell is a legacy carrier type at the time of carrier aggregation. At this time, the NCT cell can not exist in a single cell form and can be a non-stand alone cell existing as a secondary serving cell only when the main serving cell exists. Alternatively, the NCT cell may be used as the main serving cell. At this time, the NCT cell may be a stand alone cell that can exist in a single cell form.

Meanwhile, multi-cell (or point) cooperation has been introduced to increase the performance and communication capacity of a wireless communication system. Multi-cell (or point) cooperative transmission and reception is also referred to as Coordinated MultiPoint (CoMP) transmission and reception. Hereinafter, CoMP transmission / reception is referred to as CoMP. CoMP includes a beam avoiding technique in which neighboring cells (or points) cooperate to mitigate interference to a user at a cell (or point) boundary, a joint transmission technique in which neighboring cells cooperate to transmit the same data, And a dynamic point selection method in which one of the cells is dynamically selected and data is transmitted. In a next generation wireless communication system such as IEEE (Institute of Electrical and Electronics Engineers) 802.16m or 3GPP (Long Term Evolution) -Advanced, performance of users Is one of the main requirements, and CoMP can be considered to solve this problem. The CoMP can be performed based on various scenarios. In order for the CoMP to be smoothly performed, information on the cells (or points) constituting the CoMP should be provided to the base station and the UE. Therefore, it is required to transmit and receive information (e.g., control signaling) about the cells of the NCT between the UE and the base station for smooth CoMP in the wireless communication system constituting the NCT cell.

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for CoMP support considering NCT in a wireless communication system.

A further technical object of the present invention is to provide qcl (quasi-co location) related parameters considering the NCT to the UE.

A further technical object of the present invention is to provide qcl-related parameters peculiar to an NCT cell.

Another object of the present invention is to provide control signaling information unique to an NCT cell to a UE.

Another object of the present invention is to provide CoMp smoothly by providing the UE with information that the control signaling is mapped to the physical layer peculiar to the NCT cell.

According to an aspect of the present invention, a base station supporting Coordination Multi-Point (CoMP) is provided. The base station includes a CoMP control unit for deciding to perform a CoMP operation with respect to a UE having an established RRC connection, a message processing unit for generating an RRC connection reestablishment message including CoMP configuration information, And a receiver for receiving an RRC connection reset completion message corresponding to the RRC connection reestablishment message from the terminal, wherein the RRC connection reestablishment message generated by the message processor is transmitted to the terminal And QCL information indicating a quasi co-location (QCL) relationship between specific antenna ports of a new carrier type (NCT) cell connected to the antenna port.

According to another aspect of the present invention, there is provided a terminal supporting CoMP. The UE analyzes the CoMP setting information and the QCL setting information included in the RRC connection re-establishment message, and transmits an RRC connection re-establishment completion message to the RRC connection re-establishment message A CoMP control unit for resetting RRC-related parameters based on the CoMP setting information and the QCL setting information, and a transmitter for transmitting the generated RRC connection re-setting complete message to the base station, The QCL relationship between the antenna ports peculiar to the NCT cell connected to the UE according to the CoMP setting.

According to another aspect of the present invention, there is provided a CoMP support method performed in a base station. The method includes: determining to perform a CoMP operation for an RRC connection established terminal, generating an RRC connection re-establishment message including CoMP configuration information, transmitting the generated RRC connection re-establishment message to the UE, Receiving an RRC connection re-establishment complete message corresponding to an RRC connection re-establishment message from the UE, wherein the RRC connection re-establishment message includes a QCL relationship between antenna ports peculiar to the NCT cell connected to the UE according to the CoMP setting Gt; QCL < / RTI >

According to another aspect of the present invention, there is provided a CoMP support method performed in a terminal. The method includes receiving an RRC connection reset message including CoMP setting information and QCL setting information from a base station, interpreting the CoMP setting information and QCL setting information included in the RRC connection reset message, and transmitting an RRC connection reset completion message Resetting an RRC-related parameter based on the CoMP setting information and the QCL setting information, and transmitting the generated RRC connection re-setting complete message to the base station, And the QCL relationship between the antenna ports peculiar to the NCT cell connected to the terminal according to the CoMP setting.

According to the present invention, in a network environment (i.e. CoMP) in which the TM 10 is used, the base station can transmit QCL (quasi co-location) information for reference (and search) signals of the NCT cell constituting the CoMP cooperation set to the UE have. In this case, the UE can assume the QCL relationship between the TRS or the DS of the NCT cell and the CSI-RS antenna port, and can smoothly receive and analyze the physical layer signal even in the CoMP environment.

1 is a block diagram illustrating a wireless communication system to which the present invention is applied.
2 shows a structure of a subframe of a physical layer in a wireless communication system to which the present invention is applied.
3 illustrates a structure of an uplink / downlink subframe in a wireless communication system to which the present invention is applied.
FIGS. 4 to 7 show examples in which a synchronization signal and a broadcast signal are transmitted on a LCT (Legacy Carrier Type) carrier wave.
Figs. 8 to 13 show examples in which a reference signal is transmitted on an LCT carrier wave.
14 shows an example of transmission of a synchronizing signal and a reference signal in an LCT carrier wave, an asynchronous NCT carrier wave, and a sleeping mode supporting NCT carrier wave.
FIG. 15 shows a deployment scenario of the transmission / reception points and the terminal according to an exemplary embodiment of the present invention.
16 shows a layout scenario of the transmission / reception points and the terminal according to another example of the present invention.
FIG. 17 shows a deployment scenario of the transmission / reception points and the terminal according to another example of the present invention.
18 shows a deployment scenario of the transmission / reception points and the terminal according to another example of the present invention.
FIG. 19 is a flowchart schematically illustrating QCL signaling considering NCT between a BS and a UE according to the present invention.
20 shows an example of a CoMP support method considering NCT in a base station according to the present invention.
FIG. 21 shows an example of a CoMP support method considering an NCT in a terminal according to the present invention.
22 is a block diagram schematically showing a base station and a terminal supporting CoMP in consideration of the NCT according to the present invention.

Hereinafter, some embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present disclosure rather unclear.

The present invention will be described with reference to a communication network. The work performed in the communication network may be performed in a process of controlling the network and transmitting data by a system (e.g., a base station) that manages the communication network, The work can be done.

1 is a block diagram illustrating a wireless communication system to which the present invention is applied.

Referring to FIG. 1, a wireless communication system 10 is widely deployed to provide various communication services such as voice, packet data, and the like. The wireless communication system 10 includes at least one base station (BS) 11. Each base station 11 provides communication services for a particular geographical area or frequency domain and may be referred to as a site. A site may be divided into a plurality of areas 15a, 15b, and 15c, which may be referred to as sectors, and the sectors may have different cell IDs.

A terminal 12 may be fixed or mobile and may be a user equipment (UE), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, a PDA (personal digital assistant), a wireless modem, a handheld device, and the like. The base station 11 generally refers to a station that communicates with the terminal 12 and includes an evolved Node B (eNodeB), a base transceiver system (BTS), an access point, a femto base station (Femto eNodeB) (Home eNodeB: HeNodeB), a relay, a remote radio head (RRH), and the like. Cells 15a, 15b and 15c should be interpreted in a generic sense to denote a partial area covered by the base station 11 and include all coverage areas such as megacell, macrocell, microcell, picocell, femtocell It means.

Hereinafter, a downlink refers to a communication or communication path from the base station 11 to the terminal 12, and an uplink refers to a communication or communication path from the terminal 12 to the base station 11 . In the downlink, the transmitter may be part of the base station 11, and the receiver may be part of the terminal 12. In the uplink, the transmitter may be part of the terminal 12, and the receiver may be part of the base station 11.

There is no limit to the multiple access scheme applied to the wireless communication system 10. [ (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA , OFDM-CDMA, and the like.

These modulation techniques increase the capacity of the communication system by demodulating signals received from multiple users of the communication system. The uplink transmission and the downlink transmission may be performed using a time division duplex (TDD) scheme transmitted at different times or a frequency division duplex (FDD) scheme using different frequencies.

The wireless communication system 10 may be a Coordinated Multi Point (CoMP) system. The CoMP system refers to a communication system that supports CoMP or a communication system to which CoMP is applied. CoMP is a technique for adjusting or combining signals transmitted or received by multiple transmission / reception points (Tx / Rx). CoMP can increase data throughput and provide high quality.

The transmission / reception point may be defined as an element carrier or a cell or a base station (macro cell, Pico eNodeB, Femto eNodeB, or the like), or a remote radio head (RRH). The transmission / reception point may also be defined as a set of antenna ports. The transmitting / receiving point may transmit information on the set of antenna ports to the terminal through radio resource control (RRC) signaling. Therefore, a plurality of transmission points (TPs) in one cell can be defined as a set of antenna ports.

Each base station or cell may comprise multiple transmit and receive points. For example, multiple transmit and receive points may be macro cells forming a homogeneous network. In addition, the multiple transmission / reception points may be macro cells and RRHs having high transmission power. In addition, the multiple transmit / receive points may be RRHs with low transmit power in macrocell and macrocell regions.

The CoMP system can selectively apply CoMP. A mode in which a CoMP system performs communication using CoMP is referred to as a CoMP mode, and a mode in which the CoMP system does not communicate is referred to as a normal mode or a non-CoMP mode.

The terminal 12 may be a CoMP terminal. The CoMP terminal is a component of the CoMP system, and performs communication with the CoMP Cooperating Set. Like the CoMP system, the CoMP terminal can operate in the CoMP mode or in the normal mode. The CoMP cooperative set is a set of transmit / receive points that directly / indirectly participate in data transmission in a certain time-frequency resource for CoMP terminals.

Direct participation in data transmission or reception means that the transmission / reception points actually transmit data to or receive data from the CoMP terminal in the corresponding time-frequency resource. Indirect participation in data transmission or reception implies that the transmission / reception points do not actually transmit data to or from the CoMP terminal in the corresponding time-frequency resource, but contribute to making decisions about user scheduling / beamforming .

CoMP terminals can simultaneously receive signals from a CoMP cooperative set or simultaneously transmit signals to a CoMP cooperative set. In this case, the CoMP system minimizes the interference influence among CoMP cooperative sets considering the channel environment of each cell constituting CoMP cooperative set.

Various scenarios are possible when operating the CoMP system. The first CoMP scenario may be referred to as intra-site CoMP, with CoMP being homogeneous among a number of cells in one base station. The second CoMP scenario is a CoMP consisting of one macrocell and a homogeneous network for one or more High-Power RRHs. The third CoMP scenario and the fourth CoMP scenario are CoMPs consisting of one macro cell and one heterogeneous network for one or more low-power RRHs in the macro cell region. In this case, if the physical cell ID of the RRHs is not the same as the physical cell ID of the macro cell, the third CoMP scenario corresponds to the fourth cell CoMP scenario.

The CoMP is classified into Joint Processing (JP) and Coordinated Scheduling / Beamforming (CS / CB), and JP And CS / CB can be mixed.

In the case of the JP, the data for the terminal is available at at least one send / receive point of the CoMP cooperative set at some time-frequency resource. JP includes Joint Transmission (JT) and Dynamic Point Selection (DPS).

JT refers to the simultaneous transmission of data from multiple transmission / reception points (multi-points) belonging to CoMP cooperation set to one terminal or a plurality of terminals in a time-frequency resource. In the case of JT, multiple cells (data transmission / reception points) transmitting data to one terminal perform transmission using the same time / frequency resource.

In the case of DPS, data transmission is performed from one transmission / reception point of the CoMP cooperative set in the time-frequency resource. Transmission / reception points may be changed for each subframe in consideration of interference. The data to be transmitted is available at a plurality of transmission / reception points simultaneously. DPS includes Dynamic Cell Selection (DCS).

In the case of CS, data is transmitted from one of the transmit and receive points in the CoMP cooperative set for time-frequency resources, where user scheduling is determined by coordination between the transmit and receive points of the CoMP cooperative set.

The CB is also determined by cooperation between the sending and receiving points of the CoMP cooperation set. Coordinated Beamforming (CB) can avoid interference with neighboring cell terminals.

The CS / CB may include an SSPS (Semi-Static Point Selection) which can change the transmission / reception point by semi-static selection.

As described above, it is also possible to mix JP and CS / CB. For example, some transmit / receive points within the CoMP cooperative set may transmit data to the target station according to the JP, and other transmit and receive points within the CoMP cooperative set may perform CS / CB.

The transmission / reception point to which the present invention is applied may include a base station, a cell or an RRH. That is, the base station or the RRH may be a transmission / reception point. On the other hand, a plurality of base stations may be multiplex transmission / reception points, and a plurality of RRHs may be multiplex transmission / reception points. Of course, the operations of all base stations or RRHs described in the present invention can be similarly applied to other types of transmission / reception points.

2 shows a structure of a subframe of a physical layer in a wireless communication system to which the present invention is applied.

Referring to FIG. 2, one radio frame includes ten subframes, and one subframe includes two consecutive slots. In the case of downlink, 1, 2, 3 or 4 OFDM symbols preceding the first slot in a subframe are control regions to which a physical downlink control channel (PDCCH) is mapped, and the remaining OFDM symbols Are data regions to which a physical downlink shared channel (PDSCH) is mapped. Control channels such as PCFICH and PHICH may be allocated to the control area in addition to the PDCCH. The UE can decode the PDCCH and read the data information transmitted on the PDSCH. The number of OFDM symbols that constitute the control channel region in the subframe can be known through the PCFICH. For example, when the system bandwidth is N ^DL _RB > 10, the PCFICH indicates the first one, two or three OFDM symbols as a control region, and when N ^DL _RB = 10, the PCFICH indicates the first two, , Three or four OFDM symbols are indicated as control areas.

The control information mapped to the PDCCH is referred to as downlink control information (DCI). DCI includes a modulation and coding scheme (MCS) field for indicating the modulation scheme of the PDSCH, an uplink or downlink resource allocation field, an uplink power control command field, A control field, a control field for indicating a random access response (RA response), and the like.

The DCI has different uses according to its format, and the fields defined in the DCI are different. Table 1 shows the DCI according to various formats.

DCI format Explanation 0 Used in scheduling of PUSCH (uplink common channel) in uplink cell One Used for scheduling one PDSCH codeword in one cell 1A Used for simple scheduling of one PDSCH codeword in one cell and in a random access procedure initiated by a PDCCH command. 1B Used for simple scheduling of one PDSCH codeword in one cell using precoding information 1C Used for brief scheduling of one PDSCH codeword and notification of MCCH changes 1D Used for simple scheduling of one PDSCH codeword in one cell, including precoding and power offset information. 2 Used for PDSCH scheduling for terminals configured in spatial multiplexing mode. 2A Used for PDSCH scheduling of UEs configured in CDD mode with large delay. 2B Used in transmission mode 8 (dual layer transmission, etc.) 2C Used in transmission mode 9 (multi layer transmission) 2D Used in transfer mode 10 (CoMP) 3 Used for transmission of TPC commands for PUCCH and PUSCH with 2-bit power adjustment 3A Used for transmission of TPC commands for PUCCH and PUSCH with single bit power adjustment. 4 Used for scheduling of PUSCH in multi-antenna port transmission mode cell for uplink

Referring to Table 1, the DCI format includes a format 0 for PUSCH scheduling in a UL cell, a format 1 for scheduling one PDSCH codeword, a format 1A for compact scheduling of one PDSCH codeword, a DL- SCH for very simple scheduling, Format 2 for PDSCH scheduling in a closed-loop spatial multiplexing mode, Format 2A for PDSCH scheduling in an open-loop spatial multiplexing mode, A format 2B used in a transmission mode (TM) 8, a format 2C used in a transmission mode 9, a format 2D used in a transmission mode 10, a format for transmission of a transmission power control (TPC) command for an uplink channel 3 and 3A, and a format 4 for PUSCH scheduling in a multi-antenna port transmission mode for an uplink.

Each field of the DCI is sequentially mapped to _n information bits a ₀ through a _{n -1} . For example, if the DCI is mapped to a total of 44 bits of information bits, each DCI field is sequentially mapped to a ₀ to a ₄₃ . DCI formats 0, 1A, 3, and 3A may all have the same payload size. DCI formats 0 and 4 may be referred to as uplink grants.

FIG. 3 shows a structure of an uplink / downlink slot in a wireless communication system to which the present invention is applied.

Referring to FIG. 3, one subframe is composed of two slots as described above. A slot may contain a plurality of symbols in the time domain. For example, in the case of a wireless system using Orthogonal Frequency Division Multiple Access (OFDMA) in the downlink, the symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol. On the other hand, in a radio system using a single carrier transmission scheme based on a Discrete Fourier Transform-Spread OFDM (DFTS-OFDM) scheme in the uplink, the symbol may be a DFTS-OFDM symbol. The single carrier transmission scheme based on DFTS-OFDM can be called SC-FDMA (Single Carrier Frequency Division Multiple Access), and the DFTS-OFDM symbol can be called SC-FDMA symbol.

On the other hand, the representation of the symbol period of the time domain is not limited by the multiple access scheme or the name. For example, in a time domain, a plurality of symbols may be a single-carrier-frequency division multiple access (SC-FDMA) symbol, a symbol period, etc. in addition to an OFDM symbol.

The number of OFDM symbols or SC-FDMA symbols included in one slot may vary according to the length of CP (Cyclic Prefix). For example, one slot may include seven symbols in the case of a normal CP, and one slot may include six symbols in the case of an extended CP.

One slot includes a plurality of subcarriers in the frequency domain and includes seven OFDM symbols or SC-FDMA symbols in the time domain. A resource block (RB) is a resource allocation unit. If a resource block includes 12 subcarriers in the frequency domain, one resource block may include 7 * 12 resource elements (REs). The resource block may be referred to as a PRB (Physical Resource Block).

The resource element represents the smallest frequency-time unit to which the modulation symbol of the data channel or the modulation symbol of the control channel is mapped. If there are M subcarriers on one OFDM symbol and one slot includes N OFDM symbols, one slot includes M * N resource elements. Similarly, if there are M subcarriers on one SC-FDMA symbol and one slot includes N SC-FDMA symbols, one slot includes M * N resource elements.

FIGS. 4 to 7 show examples in which a synchronization signal and a broadcast signal are transmitted on a LCT (Legacy Carrier Type) carrier wave. In particular, FIG. 4 illustrates intra-frame sync signals and broadcast signal resources having a normal CP in the FDD mode, and FIG. 5 illustrates sync signals and broadcast signal resources in a wireless frame having an extended CP in the FDD mode. FIG. 6 illustrates an intra-frame synchronization signal and a broadcast signal resource having a normal CP in the TDD mode, and FIG. 7 illustrates an intra-frame synchronization signal and a broadcast signal resource having an extended CP in the TDD mode.

The terminal performs an initial cell search operation such as synchronizing with a base station when the power is turned on or a new cell is entered. To this end, the mobile station receives a synchronization signal, for example, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from a base station, synchronizes with the base station and transmits information such as a cell identifier Can be obtained. Then, the terminal can receive a broadcast signal, for example, a physical broadcast channel (PBCH) from the base station, and obtain in-cell broadcast information.

Referring to FIG. 4 to FIG. 7, the synchronization signal and the broadcast signal will be described in more detail as follows.

The synchronization signal is divided into PSS and SSS. PSS is used to obtain time domain synchronization and / or frequency domain synchronization such as OFDM symbol synchronization and slot synchronization, and SSS is used for frame synchronization, cell group ID and / or cell CP configuration (i.e., use of normal CP or extended CP Information). 4 to 7, the PSS and the SSS are transmitted in two OFDM symbols of each radio frame, respectively. Also, the PSS and the SSS are transmitted on six RBs, three in the left and right, around the DC subcarrier in the corresponding OFDM symbol.

The PBCH includes basic system information for communication. Specifically, the contents of the PBCH message are represented by a master information block (MIB) in the RRC layer. The PBCH includes a downlink system bandwidth (DL BW: DL-Bandwidth), a PHICH setting, and a system frame number (SFN: System Frame Number). Accordingly, the UE can explicitly inform the DL BW, SFN, and PHICH setting by receiving the PBCH. Meanwhile, the UE can implicitly know the number of transmission antenna ports of the base station through the PBCH reception.

The encoded PBCH can be mapped to 4 subframes for 40 ms as shown in FIGS. The 40 ms timing is blind detected and there may not be an explicit signaling for it. The PBCH can be mapped to four OFDM symbols and six RBs. In the time domain, the PBCH is transmitted in OFDM symbols 0-3 of the second slot of the first subframe in the radio frame. On the other hand, in the frequency domain, the PBCH is mapped only to 72 central subcarriers regardless of the actual system bandwidth. That is, it is transmitted on six RBs, three left and right, around a DC (Direct Current) subcarrier left unused.

Meanwhile, in a wireless communication system, it is necessary to estimate an uplink channel or a downlink channel for data transmission / reception, system synchronization acquisition, channel information feedback, etc., and compensates for signal distortion caused by a sudden change in environment. The process of restoring the signal is called channel estimation. It is also necessary to measure the channel state of the cell or other cell to which the terminal belongs. Generally, a transceiver uses a reference signal (RS) known to each other for channel estimation or channel state measurement.

Figs. 8 to 13 show examples in which a reference signal is transmitted on an LCT carrier wave.

The downlink reference signal includes a cell-specific RS (CRS), a mobile broadcast single frequency network (MBSFN) reference signal, a UE-specific RS, a positioning RS (PRS) And a CSI (Channel State Information) reference signal (CSI-RS).

A multi-antenna system basically requires a plurality of physically configured antennas. There may be logically separated antenna ports defined on the basis of transmitted data and signals. The resource element used for the reference signal of one antenna port is not used for the reference signal of another antenna port. This is to avoid interference between antennas transmitting different reference signals. For example, each antenna port may have a 1: 1 mapping relationship with a physical antenna so that only one reference signal is transmitted per antenna. Also, the antenna port may have a mapping relationship of 1: 1 or 1: n with the physical antenna. For example, if there are four physical antennas set for transmission to the base station or the terminal, the number of logically configurable antenna ports may be one, two, or four. If the number of antenna ports is one, the antenna port has a mapping relationship with four physical antennas. Also, if the number of antenna ports is two, each antenna port may have a mapping relationship with one to three physical antennas among four physical antennas. At this time, the total number of physical antennas mapped to all of the antenna ports can not exceed the total number of physical antennas.

The CRS is used for channel estimation as a reference signal transmitted to all UEs in a cell. The CRS may be transmitted in all downlink subframes within a cell supporting PDSCH transmission.

A UE-specific reference signal is a reference signal received by a specific UE or a specific UE group in a cell, and may be referred to as DMRS (Demodulation RS) since it is mainly used for data demodulation of a specific UE or a specific UE group.

The MBSFN reference signal is a reference signal for providing a Multimedia Broadcast Multicast Service (MBMS), and can be transmitted in a subframe allocated for MBSFN transmission. The MBSFN reference signal can be defined only in the extended CP structure.

The PRS can be used for position measurement of the UE. The PRS can be transmitted only through the resource blocks in the DL subframe allocated for the PRS transmission.

The CSI-RS may be used for estimation of channel state information. The CSI-RS is arranged in a frequency domain or a time domain. The CSI-RS may be configured to estimate a channel state using a CSI-RS and to transmit a channel quality indicator (CQI), a precoding matrix indicator (PMI) A rank indicator (RI) or the like may be reported from the terminal as channel state information. The CSI-RS may be transmitted on one or more antenna ports. For example, the CSI-RS may be transmitted using not only one antenna port but also two antenna ports, four antenna ports, eight antenna ports or the like under MIMO operation.

In the CoMP system, a plurality of cells or transmission / reception points can transmit a reference signal, for example, a CSI-RS to a UE. In this case, CSI-RSs using different resources from different transmission / reception points to one terminal can be transmitted. In the CoMP system, the reference signal sequence may be cell-specific determined. In particular, in a CoMP environment in which a cell ID of a transmission / reception point (for example, RRHs) cooperating with a specific transmission / reception point (for example, a macro cell) is equal to each other, A sequence may be used to generate the reference signal. This means that all the transmission / reception points (for example, RRHs) belonging to the same cooperative set as the macro cell transmit reference signals using the same reference signal sequence.

FIG. 8 schematically shows that CRS is mapped to RE in the case of a regular CP (Cyclic Prefix).

Referring to FIG. 8, R _p denotes an RE used for CRS transmission at the antenna port P. For example, R ₀ represents the RE used for CRS transmission at antenna port 0, and R ₁ represents the RE used for CRS transmission at antenna port 1.

Also, FIG. 9 schematically shows that CRS is mapped to RE in the case of the extended CP.

As shown in FIGS. 8 and 9, the CRS is mapped to the RE in a predetermined pattern every subframe.

10 schematically shows that the DMRS is mapped to RE in the case of a regular CP (Cyclic Prefix).

Referring to FIG. 10, R _p denotes an RE used for DMRS transmission at the antenna port P. For example, R ₇ represents RE used for DMRS transmission at antenna port 7, and R ₈ represents RE used for DMRS transmission at antenna port 8. Even in the same antenna port, RE used for DMRS transmission may be changed according to a special subframe configuration.

11 schematically shows that the DMRS is mapped to the RE in the case of the extended CP.

As shown in Figs. 10 and 11, the DMRS is mapped to RE in a predetermined pattern.

12 schematically shows an example of a downlink frame structure in which a CSI-RS is mapped to an RE in the case of a normal CP. Also a mapping of the CSI-RS shown in Figure 12 is an example of the configuration CSI (CSI configuration) 0 for the normal CP, R _p represents an RE which is used to CSI-RS transmitted from antenna port P. For example, R ₁₅ represents RE used for CSI-RS transmission at antenna port 15, and R ₁₆ represents RE used for CSI-RS transmission at antenna port 16.

Also, FIG. 13 schematically shows an example in which the CSI-RS is mapped to the RE in the case of the extended CP. The mapping of the CSI-RS shown in FIG. 13 relates to the CSI configuration 0 for the extended CP.

As shown in FIGS. 12 and 13, the CSI-RS can be mapped to a RE in a predetermined pattern according to an antenna port to be transmitted.

On the other hand, in a multi-element carrier system supporting a Carrier Aggregation (CA) and a CoMP system supporting multi-cell (or point) cooperative communication, all the carriers are transmitted in the physical layer, PBCH) and reference signals are transmitted and received, the data area to be transmitted is relatively reduced due to unnecessary transmission of the control signal, which is inefficient.

To solve this problem, a new carrier type (NCT) can be used. The NCT may not transmit signals such as PBCH, PDCCH, PHICH, and PCFICH, for example. The NCT may not support transmission modes (TM) 1 to 8. That is, TM9 or TM10 can be supported in NCT. Up to 8 layers can be supported in NCT and DCI formats 1A and 2C (TM9) or 2D (TM10) can be used for PDSCH transmission on NCT. The DCI format 1A and / or 2C (TM9) or 2D (TM10) may be indicated via ePDCCH (enhanced PDCCH) on the NCT and may be indicated via cross-carrier scheduling from the LCT.

Specifically, an NCT may include a NCT that supports a non-standalone NCT, a standalone NCT, a macro-assisted NCT, and a dormant mode.

First, a non-standalone NCT is an NCT that can not exist in a single cell form and can exist in the form of a secondary serving cell if there is a main serving cell. For example, when a legacy carrier type (LCT) is set as a main serving cell in a terminal in which a CA is set, non-standalone NCT secondary serving cells can be clustered together.

A non-standalone NCT can be divided into a synchronized NCT and an asynchronized NCT.

Synchronous NCT means an NCT operating with reference to the synchronization of another carrier (e.g., a legacy carrier). In other words, the synchronous NCT may be synchronized with other carriers in terms of time and frequency to indicate a case where a separate synchronization procedure is not required in the terminal. The synchronous NCT may not transmit PSS, SSS and CRS (and TRS, as described below). This allows overhead reduction of common RSs. In the synchronous NCT, there may be advantages such as interference mitigation, energy saving, and imporved spectral efficacy for the adjacent cell due to the reduction of the overhead, and due to the reduction of the public RSs A network provider can use a frequency band more flexibly.

An asynchronous NCT is an NCT that can operate independently by acquiring independent synchronizations independent of other carriers (eg, legacy carriers). In this case, the asynchronous NCT transmits the same PSS and SSS as the legacy carrier type, but the CRS transmission frequency may be low. For example, in an asynchronous NCT, a CRS may be transmitted with a certain period, in which case the CRS may be referred to as reduced CRS (reduced CRS) or TRS (Tracking RS). Specifically, for example, the TRS may be transmitted using a CRS antenna port 0 based and a Rel-8 sequence with a 5 ms period on the time axis. The TRS can be transmitted in the entire system bandwidth on the frequency axis, or only in some system bandwidths. In this case, the CSI-RS is also transmitted.

Second, the standalone NCT is an NCT that can exist in a single cell form. For example, a standalone NCT can exist in the form of a main serving cell. Standalone NCT can be removed CRS. Accordingly, the existing PDCCH, PHICH, and PCFICH, which are CRS-based control channels, can be removed or replaced with other types of channels. Demodulation of ePDCCH and PDSCH in Standalone NCT can be performed based on DMRS.

Third, the macro-assisted NCT performs the initial cell entry procedure and the handover procedure through the LCT carrier, and once the RRC is connected, the macro-assisted NCT carrier carries the carrier type that performs the entry through the handover or other methods It can mean. Therefore, compared with the stand-alone NCT, there is no need to newly define methods such as a new cell entry procedure and a handover procedure. Other PDCSH and ePDCCH-related ones can be used in the same way as existing definitions. Macro-assisted NCTs can be treated according to their nature in accordance with non-standalone NCTs or standalone NCTs. For example, in the macro-assisted NCT, it is similar to the non-standalone NCT in that it is performed through the LCT carrier in the initial cell entry procedure and the like, It can be handled similarly to a standalone NCT.

Fourth, an NCT that supports a sleep mode means an NCT that can enter an on (active), off (sleep) state (or mode), as the case may be. Sleep Mode Support If the NCT is in sleep mode, it can be called a dormant NCT. For example, the sleep mode supported NCT may be operated in an active or sleep mode depending on the traffic condition. That is, the base station can turn off power to the sleep mode supported NCT cell according to the traffic requirements of the terminal, thereby saving energy and reducing cell interference. When the sleep mode supporting NCT is in the sleep mode, the base station can transmit only the cell identification signal (e.g., PSS / SSS) of a longer period without transmitting the CRS to transmit the minimum signal to the mobile station. In this case, the cell identification signal may be called a DS (Discovery Signal).

14 shows an example of a synchronization signal and a reference signal transmission in the LCT, the asynchronous NCT, and the sleep mode supported NCT.

Referring to FIG. 14, (a) shows that the CRS is transmitted in every subframe in the LCT, and the cell identification signal is periodically transmitted every fifth slot. For example, the cell identification signal may be PSS, SSS, or the like. (b) shows that the CRS is transmitted in the asynchronous NCT at a cycle of 5 ms. In this case, the periodically transmitted CRS may be referred to as reduced CRS (reduced CRS) or TRS (tracking RS) as described above. The cell identification signal is periodically transmitted in the same manner as the LCT. (c) shows that the cell identification signal is periodically transmitted without the CRS transmission if the sleep mode supporting NCT is in the sleep mode. The sleep mode supporting NCT may be operated with the LCT of (a) and operated with the asynchronous NCT of (b).

FIG. 15 shows a deployment scenario of the transmission / reception points and the terminal according to an exemplary embodiment of the present invention. 15 shows a case where a cell of an asynchronous NCT is connected to a terminal.

15, the terminal 1550 is located at the cell site of the macro base station 1500, and is also located at the cell sites of the LPN1 (low power node 1, 1510) and LPN2 (1520). 15, it is assumed that the cell of the macro base station 1500 is a backward compatible carrier type (BCCT), that is, the LCT, and the cells of LPN1 1510 and LPN2 1520 are NCTs. Here, the cell of the macro base station 1500 uses the frequency band f1 as the main serving cell, and the cells of the LPN1 1510 and the LPN2 1520 use the frequency band f2 as the secondary serving cells.

In this scenario, TRS and PSS / SSS can be sent from the LPN1 1510 and the LPN2 1520 to the terminal 1550 if the carrier type of the LPN1 1510 cell and the LPN2 1520 cell is an asynchronous NCT. The cells of the macro base station 1500 may provide full backward compatibility to existing standards.

The macro base station 1500 is connected to the LPN1 1510 and the LPN2 1520 via a backhaul. The intra-site (or intra-base station) CoMP scheme may be applied if the macro base station 1500 is connected to the LPN1 1510 and the LPN2 1520 through an ideal backhaul, An inter-site (or inter-base station) CoMP technique may be applied when the packet is connected to the LPN1 1510 and the LPN2 1520 through a non-ideal backhaul. Here, an ideal backhaul is a case where a delay of a signal through a backhaul is less than a certain level. For example, if the delay is smaller than a cyclic prefix (CP), the backhaul can be regarded as an ideal backhaul.

Meanwhile, the terminal (i.e., the CoMP terminal) in which the TM 10 is set up transmits the higher layer signaling and / or the higher layer signaling to instruct the terminal about the assumption of the characteristics of the channel experienced by the antenna ports between the antenna ports 0 to 3 and 7 to 22 Can be set to any of quasi co-location (QCL) types through DCI 2D messages. For example, large-scale properties of a channel over a conveyed symbol at one of the two antenna ports may be transmitted to a single antenna at another antenna port, If the symbol can be estimated from the channel over which it is transmitted, it can be said that the two antenna ports correspond to the same location. Here, the large-scale channel characteristics include one or more of a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay. .

The QCL type may include QCL type A, QCL type B. When set to QCL type A, the terminal may assume that the antenna ports 0 to 3, 7 to 22 of the serving cell conform to the same place placement in terms of delay spread, Doppler spread, and average delay with respect to.

When set to the QCL type B, the UE transmits PDSCH RE mapping in the DCI format 2D, scheduling PDSCH transmission, and antenna ports corresponding to the CSI-RS resource configuration through a Quasi Co-Location (QCL) 15-22, and antenna ports 7-14 associated with PDSCH decoding are assumed to be quasi-co-located in terms of Doppler shift, Doppler spread, average delay, and delay spread. In this case, the CSI-RS resource configuration can be identified by the CSI-RS resource configuration identifier for the PDSCH RE mapping. In order to signal the QCL definition between the CRS ports 0-3 and the CSI-RS ports 15 to 22, information including the corresponding CRS ports 0-3 is specified in the CSI-RS resource setting information indicating the corresponding CSI-RS ports .

The base station transmits QCL signaling to the terminal to indicate the relationship of CRS ports (antenna ports 0 to 3) and CSI-RS ports (antenna ports 15 to 22) to the terminal having TM10 (i.e., CoMP) . Specifically, the base station transmits the following qcl-CRS information to the UE in the CSI-RS resource configuration information.

- ASN1START

CSI-RS-ConfigNZP-rxx :: = SEQUENCE {
csi-RS-IdentityNZP-rxx CSI-RS-IdentityNZP-rxx,
antennaPortsCount-rxx ENUMERATED {an1, an2, an4, an8}
resourceConfig-rxx INTEGER (0..31),
subframeConfig-rxx INTEGER (0..154),
scramblingIdentity-rxx INTEGER (0..503),
qcl-CRS-Info-rxx SEQUENCE {
qcl-ScramblingIdentity-rxx INTEGER (0..503),
crs-PortsCount-rxx ENUMERATED {n1, n2, n4, spare1},
mbsfn-SubframeConfig-rxx MBSFN-SubframeConfig OPTIONAL - Need OR
} OPTIONAL, - Need OR
...
}

- ASN1STOP

Referring to Table 2, the CSI-RS-configNZP information element of the radio resource control (RRC) layer may include the CSI-RS resource configuration information. Specifically, when the UE is set to the QCL type B, the CSI-RS-configNZP information element may include a qcl-CRS-Info field. The qcl-CRS-Info field includes a qcl-ScramblingIdentity indicating the cell ID of the QCL CRS, Crs-PortsCount indicating the number of antenna ports of the MBSFN, and mbsfn-SubframeConfig information indicating a MBSFN (Multicast Broadcast Single Frequency Network) subframe setting. The CSI-RS-configNZP information element may be transmitted from the BS to the MS through an RRC Connection Reconfiguration message. In this case, the BS transmitting the RRC connection re-establishment message may be a macro base station having a main serving cell (Pcell) for the MS. The UE can determine the QCL relationship between the CSI-RS antenna port and the CRS antenna port based on the above information.

However, as described above, when the CRS is not transmitted from the base station to the mobile station (for example, in case of synchronous NCT), TRS is transmitted instead of CRS (for example, in case of asynchronous NCT) In this case, the UE can accurately grasp the QCL relationship of the antenna ports with respect to the reference signals only by using the conventional information element message structure as shown in Table 2 above (e.g., I can not. To solve this problem, it is necessary to signal the QCL relationship of the antenna ports to the reference signals according to the NCT.

For example, QCL signaling between the TRS antenna ports and the CSI-RS antenna ports is required when a base station (e.g., LPN1 or LPN2) with an asynchronous NCT is connected to the terminal as described above with reference to FIG. That is, the terminal connected to the asynchronous NCT cell of the base station and having the TM10 (CoMP) and the QCL type B should be provided with information for QCL determination of the antenna ports. To this end, it is necessary for the base station to signal to the AT about at least one of TRS subframe information indicating the subframe number at which the TRS starts mapping (or transmitting) in the time domain of the physical layer and bandwidth information of the TRS subframe . Here, if the TRS subframe information is determined based on the cell ID, the TRS subframe information can be represented through qcl-ScramblingIdentity information or v_shift information. Here, the qcl-ScramblingIdentity information is information directly indicating the cell ID, and the v-shift information is indirectly indicating the cell ID since the CRS is mapped to the physical layer in the frequency axis and is shifted according to the cell ID.

In this case, for example, the base station can set the CSI-RS-configNZP information element as follows and transmit it to the terminal.

- ASN1START

CSI-RS-ConfigNZP-rxx :: = SEQUENCE {
csi-RS-IdentityNZP-rxx CSI-RS-IdentityNZP-rxx,
antennaPortsCount-rxx ENUMERATED {an1, an2, an4, an8}
resourceConfig-rxx INTEGER (0..31),
subframeConfig-rxx INTEGER (0..154),
scramblingIdentity-rxx INTEGER (0..503),
qcl-CRS-Info-rxx SEQUENCE {
qcl-ScramblingIdentity-rxx INTEGER (0..503),
crs-PortsCount-rxx ENUMERATED {n1, n2, n4, spare1},
mbsfn-SubframeConfig-rxx MBSFN-SubframeConfig OPTIONAL - Need OR
trs - Subframe ENUMERATED { n0 , n1 , n2 , n3 , n4 }
trs - Bandwidth
} OPTIONAL, - Need OR
...
}

- ASN1STOP

Referring to Table 3, the CSI-RS-configNZP information element includes trs-Subframe information indicating the number of a subframe in which TRSs are mapped (or transmitted) in the qcl-CRS-Info field, And trs-Subframe information indicating a bandwidth to be transmitted. If the trs-Subframe information is determined based on the cell ID, the tra-Subframe information may be replaced with qcl-ScramblingIdentity information or v-shift information as described above. The UE can determine the QCL relationship between the CSI-RS antenna ports and the TRS antenna ports based on the above information.

On the other hand, the QCL type can be newly defined for NCT. For example, when the QCL type C is set in the UE, the UE sets the antenna ports 15 to 22 corresponding to the CSI-RS resource setting and the antenna ports corresponding to the TRS (or DS) resource configuration to Doppler shift , The Doppler spread, the average delay, and the delay spread.

In this case, for example, the base station can set the CSI-RS-configNZP information element as follows and transmit it to the terminal.

- ASN1START

CSI-RS-ConfigNZP-rxx :: = SEQUENCE {
csi-RS-IdentityNZP-rxx CSI-RS-IdentityNZP-rxx,
antennaPortsCount-rxx ENUMERATED {an1, an2, an4, an8}
resourceConfig-rxx INTEGER (0..31),
subframeConfig-rxx INTEGER (0..154),
scramblingIdentity-rxx INTEGER (0..503),
qcl - TRS - Info - rxx SEQUENCE {
qcl-ScramblingIdentity-rxx INTEGER (0..503),
Trs-PortsCount-rxx ENUMERATED {n1, n2, n4, spare1}
mbsfn-SubframeConfig-rxx MBSFN-SubframeConfig OPTIONAL - Need OR
trs-Subframe ENUMERATED {n0, n1, n2, n3, n4}
trs-Bandwidth
} OPTIONAL, - Need OR
...
}

- ASN1STOP

Referring to Table 4, the CSI-RS-configNZP information element of the RRC layer may include the qcl-TRS-Info field when the UE is set to the QCL type C, the qcl-TRS-Info field includes the qcl-ScramblingIdentity information, Trs -PortsCount information, mbsfn-SubframeConfig information, trs-Subframe information, and trs-Bandwidth information. If the trs-Subframe information is determined based on the cell ID, the tra-Subframe information may be deleted or replaced with v-shift information.

16 shows a layout scenario of the transmission / reception points and the terminal according to another example of the present invention. 16 shows a case where a cell of a synchronous NCT is connected to a terminal.

Referring to FIG. 16, in (a), the terminal 1650 is set to a plurality of cells (Carrier Aggregation) of the macro base station 1600. (a), a cell using the frequency band f1 is a BCCT (i.e., LCT), and a cell using the frequency band f2 is a synchronous NCT. In this case, TRS and PSS / SSS can be set not to be transmitted from the base station 1600 to the terminal 1660 in the cells of the synchronous NCT. Therefore, even if TM10 and QCL type B (or QCL type C) are set up, the terminal 1650 does not have the CRS as well as the TRS on the synchronous NCT cell, so the CSI-RS and the DMRS The synchronization information is unclear.

Also, in (b), the terminal 1650 is connected to the cells of the macro base station 1600 and also to the cells of the LPN1 1610 and the cells of the LPN2 1620. [ (b), the cell of the macro base station 1600 is a BCCT (i.e., LCT), and the cells of the LPN1 1610 and the LPN2 1620 are asynchronous NCT and synchronous NCT. Here, it can be assumed that the cell of f3 in which the synchronous NCT operated by LPN1 / 2 (1610, 1620) is deployed is synchronized to the cell of f2 in which the asynchronous NCT is deployed. In such a case, TRS and PSS / SSS can be set not to be transmitted on the cells of the LPN1 / 2 (1610 and 1620) using the frequency band f3. Therefore, even if TM10 and QCL type B (or QCL type C) are set, the terminal 1650 does not have the CRS as well as the TRS on the cells of the LPN1 / 2 (1610 and 1620) The synchronization information for CSI-RS and DMRS on NCT is unclear.

However, in the above case (a), the QCL signal of the current (rel-11) in the view of the QCL assumption of the antenna ports (i.e., the CSI-RS port 15-22 and the CRS ports 0-3) (Via the BCCT cell of the macro base station) the qcl-CRS information setting in the CSI-RS resource configuration for the synchronous NCT cell). That is, for example, the cell ID information for the CRS transmitted from the BCCT (or LCT) cell of the macro base station 1600 is added to the CSI-RS resource setting information for the synchronous NCT cell, And the CSI-RS port 15-22 of the synchronous NCT cell is signaled to the terminal 1650 that the QCL has been performed.

On the other hand, in the case of (b) above, the QCL signaling proposed above (i.e., the CSI-RS resource setting on the synchronous NCT) in the view of the QCL hypothesis of the antenna ports (i.e., CSI- RS port 15-22 and CRS port 0-3) (From the asynchronous NCT) to the qcl-TRS information in the network. That is, for example, the cell ID information, the TRS subframe information, the mbsfn subframe information, and the TRS transmission bandwidth for the TRS transmitted from the asynchronous NCT cell of the LPN1 / 2 (1610, 1620) RS resource setting information, signaling the terminal 1650 that the TRS port on the asynchronous NCT on the LPN 1/2 (1610, 1620) and the CSI-RS port 15-22 of the synchronous NCT cell are QCLed.

FIG. 17 shows a deployment scenario of the transmission / reception points and the terminal according to another example of the present invention. 17 shows a case where a cell of a standalone NCT is connected to a terminal.

17, the terminal 1750 is connected to the cell of the macro base station 1700, and is also connected to the cell of the LPN1 1710 and the cell of the LPN2 1720. [ All of the cells use the frequency band f1. Here, the cell of the macro base station 1700 is a BCCT (i.e., LCT), and the cell of the LPN1 1710 and the cell of the LPN2 1720 are stand-alone NCTs.

Also in this case, the signaling method proposed in the present invention can be used to indicate the QCL hypothesis between the antenna ports. That is, when the terminal 1750 is connected to the standalone NCT cell, the macro base station 1700 may include TRS setting information in the CSI-RS resource setting information element of the RRC message transmitted to the terminal.

18 shows a deployment scenario of the transmission / reception points and the terminal according to another example of the present invention. 18 shows a case where a sleep mode supporting NCT cell is connected to a terminal.

(a), the terminal 1850 is connected to the cell of the macro base station 1800 and also to the cell of the LPN1 1810 and the cell of the LPN2 1820. [ All of the cells use the frequency band f1. Here, the cell of the macro base station 1800 is a BCCT (i.e., LCT), and the cell of LPN1 1810 and the cell of LPN2 1820 are a sleep mode supporting NCT cell. (b), the cell of the macro base station 1800 uses the frequency band f1, and the cell of the LPN1 1810 and the cell of the LPN2 1820 are different from (a) in that the frequency band f2 is used.

In the example of FIG. 18, the sleep mode supporting NCT cell transmits only the cell identification signal of a longer period (for example, PSS / SSS) to the terminal without transmitting CRS (and TRS) to the terminal for energy saving in the sleep mode . In this case, the cell identification signal may be called a DS (Discovery Signal). That is, the DS can always be transmitted to the terminal regardless of whether the sleep mode supported NCT cell is in an active mode or a sleep mode, and may be used for synchronization purposes. In other words, the TRS transmitted for asynchronous NCT synchronization purposes may not be transmitted on the NCT with sleep mode. Therefore, when TM10 and QCL type B (or QCL type C) are configured on a sleep mode supported NCT cell, QCL signaling for CSI-RS and DS is required. In this case, CSI-RS # 1 resource setting for LPN1 and CSI-RS # 2 resource setting for LPN2 can be performed for the corresponding terminal. That is, DS resource setting is included on each CSI-RS resource configuration for the sleep mode supported NCT cells connected to the UE, and the BS must be signaled to the UE. In this case, the DS resource configuration included in the CSI-RS resource configuration includes a cell ID for a quasi co-located or quasi co-location (QCL) DS, a sub frame period for a QCL DS, offset, and the number of antenna ports for the QCL DS.

For example, the base station can transmit the CSI-RS-configNZP information element to the UE by setting the CSI-RS-configNZP information element as follows.

- ASN1START

CSI-RS-ConfigNZP-rxx :: = SEQUENCE {
csi-RS-IdentityNZP-rxx CSI-RS-IdentityNZP-rxx,
antennaPortsCount-rxx ENUMERATED {an1, an2, an4, an8}
resourceConfig-rxx INTEGER (0..31),
subframeConfig-rxx INTEGER (0..154),
scramblingIdentity-rxx INTEGER (0..503),
qcl-CRS-Info-rxx SEQUENCE {
qcl-ScramblingIdentity-rxx INTEGER (0..503),
crs-PortsCount-rxx ENUMERATED {n1, n2, n4, spare1},
mbsfn-SubframeConfig-rxx MBSFN-SubframeConfig OPTIONAL - Need OR
trs-Subframe ENUMERATED {n0, n1, n2, n3, n4}
servingCellidx ENUMERATED {n0, n1, n2, n3, n4}
} OPTIONAL, - Need OR
qcl-DS-Info-rxx SEQUENCE {
ds-ScramblingIdentity
ds-Periodicity
ds-SubframeOffset
ds-PortsCount
}
...
}

- ASN1STOP

Referring to Table 5, the CSI-RS-configNZP information element of the RRC layer may include a qcl-CRS-Info field and a qcl-DS-Info field. For example, the qcl-DS-Info field may be included in the CSI-RS-configNZP information element if the terminal is set to QCL type B (or QCL type C) QCL type C) and may be included in the CSI-RS-config NZP information element if the serving cell is a sleep mode supported NCT cell. The qcl-CRS-Info field may contain trs-Subframe information. The qcl-DS-Info field includes ds-ScramblingIdentity information indicating the cell ID of the QCL DS, ds-Periodicity information indicating the transmission period of the QCL DS, ds-SubframeOffset information indicating the offset information at which the QCL DS starts to be transmitted, And ds-PortsCount information indicating the number of antenna ports of the DS.

In addition to the QCL signaling for the CSI-RS port and the DS port as described in Table 5, QCL signaling for the DS port and the TRS port can be performed when the dormant mode supporting NCT cell is an asynchronous NCT cell. Or QCL signaling for the DS port and the CRS port may be performed when a non-TRS CRS is transmitted in the sleep mode supporting NCT cell.

FIG. 19 is a flowchart schematically illustrating QCL signaling considering NCT between a BS and a UE according to the present invention.

Referring to FIG. 19, the base station generates an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message regarding TM10 (i.e. CoMP) configuration including an NCT cell and transmits the RRC Connection Reconfiguration message to the mobile station in operation S1900. In this case, the BS transmitting the RRC connection re-establishment message to the MS may be a macro base station. Here, the RRC connection re-establishment message may include QCL information for reference signals, which is specific to an NCT cell (additionally) connected to the UE according to the CoMP setting.

For example, if the cell connected to the terminal (additionally) through the CoMP setting is an asynchronous NCT cell, the RRC connection re-establishment message may include QCL information for CSI-RS and TRS of the corresponding asynchronous NCT cell. In this case, the RRC connection reset message includes the CSI-RS-ConfigNZP information element as described in Tables 3 to 4, and the QCL information for the CSI-RS port and the TRS port includes the CSI-RS-ConfigNZP information element . More specifically, for example, when the terminal is set to the QCL type B (or QCL type C), the QCL information for the CSI-RS port and the TRS port may be in the form of qcl-CRS-Info information (or qcl-TRS-Info RS-Config-NZP information element in the CSI-RS-ConfigNZP information element. In this case, the QCL information may include at least one of TRS scrambling ID information (Cell ID), TRS subframe information, and TRS bandwidth information. In addition, when the TRS subframe information is determined based on the cell ID, the TRS subframe information can be represented through qcl-ScramblingIdentity information or v_shift information.

As another example, if the cell connected to the terminal (additionally) through the CoMP setting is a sleep mode supported NCT cell, the RRC connection reset message may include QCL information for the CSI-RS port and DS port of the corresponding sleep mode supported NCT cell have. In this case, the RRC connection reset message includes the CSI-RS-ConfigNZP information element, and the QCL information for the CSI-RS port and the DS port may be included in the CSI-RS-ConfigNZP information element have. Specifically, for example, when the terminal is set to the QCL type B (or the QCL type C), the QCL information for the CSI-RS port and the DS port is transmitted to the CSI-RS-ConfigNZP May be included in the information element. In this case, the QCL information includes at least one of cell ID information for the QCL DS, subframe period information for the QCL DS, subframe offset information for the QCL DS, and information on the number of antenna ports for the QCL DS .

Also, when the sleep mode supporting NCT cell is an asynchronous NCT cell, the RRC connection re-establishment message may include QCL information for the DS port and the TRS port of the corresponding NCT cell. Or when the non-TRS CRS is transmitted in the sleep mode supporting NCT cell, the RRC connection reestablishment message may include the QCL information for the DS port and the CRS port.

In step S1910, the UE receives an RRC connection re-establishment message from the Node B and re-establishes RRC-related parameters in the UE based on the CoMP configuration information and the QCL information included in the RRC connection re-establishment message. Here, the RRC-related parameter reset includes the CoMP setting and the QCL setting at the terminal end.

If the RRC connection re-establishment message includes the QCL information for the CSI-RS port and the TRS port of the asynchronous NCT cell, the UE transmits at least one TRS subframe information included in the QCL information for the CSI-RS port and the TRS port (Or assume) a quasi co-located (QCL) state between the CSI-RS antenna ports and the TRS antenna ports based on the TRS bandwidth information.

When the RRC connection reset message includes the QCL information for the CSI-RS port and the DS port of the sleep mode supporting NCT cell, the UE transmits at least one of the QCL information included in the QCL information for the CSI- Based on the cell ID information for the QCL DS, the subframe period information for the QCL DS, the subframe offset information for the QCL DS, and the number of antenna ports for the QCL DS, the CSI-RS antenna ports and the DS antenna port (Or assume) the state of the QCL between them. When the sleep mode supporting NCT cell is an asynchronous NCT cell and the QCL information for the DS port and the TRS port of the corresponding NCT cell is included in the RRC connection reset message, You can check (or assume) the state of QCL between ports. Or a CRS other than the TRS is transmitted from the sleep mode supporting NCT cell and the QCL information for the DS port and the CRS port of the corresponding NCT is included in the RRC connection reestablishment message, (Or assume) the state of QCL between antenna ports.

The MS transmits an RRC connection reset message completion message to the BS (S1920). The RRC connection re-establishment complete message corresponds to the RRC connection re-establishment message transmitted from the base station to the mobile station in step S1800.

The base station transmits data to the terminal in the CoMP environment (S1930). In this case, the base station can provide a service to the terminal by configuring CoMP cooperation set with another base station (e.g., LPN). In this case, the UE receives and interprets data and RSs in the CoMP environment based on the QCL information. In this case, the terminal can smoothly receive and interpret data and RSs even when receiving signals in a CoMP environment from a base station (e.g., LPN or the like) of the NCT cell.

20 shows an example of a CoMP support method considering NCT in a base station according to the present invention.

Referring to FIG. 20, the base station generates an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message related to TM10 (i.e., CoMP) setup including an NCT cell and transmits the RRC Connection Reconfiguration message to the MS in step S2000. In this case, the BS transmitting the RRC connection re-establishment message to the MS may be a macro base station. Here, the RRC connection re-establishment message may include QCL information for the antenna ports, which is unique to the NCT cell connected (additionally) according to the CoMP setting.

For example, if the cell connected to the terminal (additionally) through the CoMP setting is an asynchronous NCT cell, the RRC connection re-establishment message may include QCL information for the CSI-RS port and the TRS port of the asynchronous NCT cell. In this case, the RRC connection reset message includes the CSI-RS-ConfigNZP information element as described in Tables 3 to 4, and the QCL information for the CSI-RS port and the TRS port includes the CSI-RS-ConfigNZP information element .

As another example, if the cell connected to the terminal (additionally) through the CoMP setting is a sleep mode supported NCT cell, the RRC connection reset message may include QCL information for the CSI-RS port and DS port of the corresponding sleep mode supported NCT cell have. In this case, the RRC connection reset message includes the CSI-RS-ConfigNZP information element, and the QCL information for the CSI-RS port and the DS port may be included in the CSI-RS-ConfigNZP information element have. Also, when the sleep mode supporting NCT cell is an asynchronous NCT cell, the RRC connection re-establishment message may include QCL information for the DS port and the TRS port of the corresponding NCT cell. Or when the non-TRS CRS is transmitted in the sleep mode supporting NCT cell, the RRC connection reestablishment message may include the QCL information for the DS port and the CRS port.

The base station receives an RRC connection reset message completion message from the UE (S2010). The RRC connection re-establishment complete message corresponds to the RRC connection re-establishment message transmitted from the base station to the mobile station in S2000.

The base station transmits data to the terminal in the CoMP environment (S2020). In this case, the base station can provide a service to the terminal by configuring CoMP cooperation set with another base station (e.g., LPN). For example, the CoMP cooperative set has a category of CoMP that includes joint processing (JP) and collaborative scheduling / beamforming (CS / CB), and JP and CS / CB can be mixed. JP includes joint transmission (JT) and dynamic transmission / reception point selection (DPS).

FIG. 21 shows an example of a CoMP support method considering an NCT in a terminal according to the present invention.

The UE receives an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message relating to TM10 (i.e., CoMP) setup including the NCT cell from the base station (S2100). In this case, the RRC connection re-establishment message may include QCL information of antenna ports for reference (and search) signals, uniquely in the NCT cell connected (additionally) according to the CoMP setting.

For example, if the cell connected to the terminal (additionally) through the CoMP setting is an asynchronous NCT cell, the RRC connection re-establishment message may include QCL information for the CSI-RS port and the TRS port of the asynchronous NCT cell.

As another example, if the cell connected to the terminal (additionally) through the CoMP setting is a sleep mode supported NCT cell, the RRC connection reset message may include QCL information for the CSI-RS port and DS port of the corresponding sleep mode supported NCT cell have.

In step S2110, the UE performs RRC-related parameter reset at the UE based on CoMP configuration information and QCL information included in the RRC connection re-establishment message. Here, the RRC-related parameter reset includes the CoMP setting and the QCL setting at the terminal end.

If the RRC connection re-establishment message includes the QCL information for the CSI-RS port and the TRS port of the asynchronous NCT cell, the UE transmits at least one TRS subframe information included in the QCL information for the CSI-RS port and the TRS port (Or assume) a quasi co-located (QCL) state between the CSI-RS antenna ports and the TRS antenna ports based on the TRS bandwidth information.

When the RRC connection reset message includes the QCL information for the CSI-RS port and the DS port of the sleep mode supporting NCT cell, the UE transmits at least one of the QCL information included in the QCL information for the CSI- Based on the cell ID information for the QCL DS, the subframe period information for the QCL DS, the subframe offset information for the QCL DS, and the number of antenna ports for the QCL DS, the CSI-RS antenna ports and the DS antenna port (Or assume) the state of the QCL between them. When the sleep mode supporting NCT cell is an asynchronous NCT cell and the QCL information for the DS port and the TRS port of the corresponding NCT cell is included in the RRC connection reset message, You can check (or assume) the state of QCL between ports. Or a CRS other than the TRS is transmitted from the sleep mode supporting NCT cell and the QCL information for the DS port and the CRS port of the corresponding NCT is included in the RRC connection reestablishment message, (Or assume) the state of QCL between antenna ports.

The MS transmits an RRC connection reset message completion message to the BS (S2120). The RRC connection re-establishment completion message corresponds to the RRC connection re-establishment message received from the base station in step S2100.

The UE receives and analyzes data and RSs in the CoMP environment based on the CoMP setting information and the QCL information (S2130). In this case, the UE can smoothly receive and interpret data and RSs even when receiving a signal in a CoMP environment from a base station (e.g., LPN or the like) of an NCT cell constituting a CoMP cooperation set.

22 is a block diagram schematically showing a base station and a terminal supporting CoMP in consideration of the NCT according to the present invention.

22, the base station 2200 according to the present invention can provide a CoMP service to the UE 2250 by configuring a CoMP cooperation set with other base stations (e.g., LPN). The base station 2200 includes a base station transmitter 2205, a base station receiver 2220, and a base station processor 2210. The base station processor 2210 performs necessary functions and controls to implement the features of the present invention as described above. The base station processor 2210 includes a message processing unit 2211 and a CoMP control unit 2212.

The CoMP control unit 2212 determines whether to perform the CoMP operation with respect to the terminal 2250 in which the RRC connection is established. The CoMP control unit 2212 can determine whether to perform the CoMP operation on the terminal 2250 based on the network configuration and the location of the terminal 2250. [ The CoMP control unit 2212 can determine a CoMP category to be performed by the CoMP cooperation set. For example, the scope of CoMP is joint processing (JP) and collaborative scheduling / beamforming (CS / CB), and JP and CS / CB can be mixed. JP includes joint transmission (JT) and dynamic transmission point selection (DPS).

The message processing unit 2211 generates an RRC connection re-establishment message including TM10 (i.e., CoMP) setting information when the CoMP operation for the UE 2250 is determined to be performed. In this case, the message processing unit 2211 is configured to perform the RRC connection reset (RRC connection reset), which further includes QCL information of antenna ports for reference (and search) signals, uniquely in the NCT cell connected to the terminal 2250 Message can be generated. In this case, the message processing unit 2211 may generate an RRC connection re-establishment message including the message syntaxes of Tables 2 to 5 above.

For example, when the cell connected to the terminal 2250 through the CoMP setting is an asynchronous NCT cell, the message processing unit 2211 adds the CSI-RS port and the TRS port of the corresponding asynchronous NCT cell to the RRC connection re- QCL information. In this case, the RRC connection reset message includes the CSI-RS-ConfigNZP information element as described in Tables 3 to 4, and the QCL information for the CSI-RS port and the TRS port includes the CSI-RS-ConfigNZP information element . Specifically, the message processor 2211 may include at least one of TRS subframe information and TRS bandwidth information as QCL information in the RRC connection re-establishment message.

In another example, if the cell connected to the terminal 2250 through the CoMP setting is a sleep mode supported NCT cell, the message processing unit 2211 transmits the RRC connection reset message to the CSI-RS port of the corresponding sleep mode supported NCT cell And may include QCL information for the DS port. In this case, the RRC connection reset message includes the CSI-RS-ConfigNZP information element and the QCL information for the CSI-RS and the DS may be included in the CSI-RS-ConfigNZP information element as described in Table 5 above. Specifically, the message processor 2211 adds the cell ID information for the QCL DS, the subframe period information for the QCL DS, the subframe offset information for the QCL DS, and the antenna port for the QCL DS as the QCL information in the RRC connection re- And information on the number of users.

If the dormant mode supporting NCT cell is an asynchronous NCT cell, the message processing unit 2211 may include QCL information for the DS port and the TRS port of the corresponding NCT cell in the RRC connection reestablishment message. Alternatively, when a CRS other than the TRS is transmitted in the sleep mode supporting NCT cell, the message processor 2211 may include the QCL information for the DS port and the CRS port in the RRC connection reestablishment message.

The base station transmitting unit 2205 transmits an RRC connection re-establishment message to the terminal 2250. The RRC connection reestablishment message includes TM10 (i.e. CoMP) setting information. In addition, the RRC connection re-establishment message may further include QCL information of antenna ports for reference (and search) signals peculiar to the NCT cell connected (additionally) according to the CoMP setting. The base station transmission unit 2205 may transmit data and RS to the terminal 2250 in cooperation with other transmission / reception points constituting the CoMP cooperation set in the CoMP environment.

The base station receiving unit 2220 receives an RRC connection reset completion message from the terminal 2250. The RRC connection reestablishment completion message corresponds to an RRC connection re-establishment message transmitted from the base station transmission unit 2205 to the UE 2250.

The terminal 2250 according to the present invention supports CoMP operation. The terminal 2250 includes a terminal receiver 2255, a terminal transmitter 2270, and a terminal processor 2260. The terminal processor 2260 performs necessary functions and controls to implement the features of the present invention as described above. The terminal processor 2260 includes a message processing unit 2261 and a CoMP control unit 2262.

The terminal reception unit 2255 receives the RRC connection re-establishment message from the base station 2200. The terminal receiving unit 2255 receives the RRC connection re-establishment message including the CoMP setting information. The terminal receiving unit 2255 may receive the RRC connection re-establishment message further including the QCL setting information.

The message processing unit 2261 analyzes or analyzes the information or the syntax of the message received from the terminal receiving unit 2255.

The message processor 2261 may interpret the received RRC connection reestablishment message and obtain the CoMP setting information and the QCL setting information included in the message. For example, the message processing unit 2261 can interpret the message statements of Tables 2 to 5 described above.

For example, when the cell connected to the terminal 2250 through the CoMP setting is an asynchronous NCT cell, the message processor 2261 interprets the RRC connection re-establishment message and notifies the CSI-RS of the asynchronous NCT cell and the TRS QCL information can be obtained. In this case, the QCL information may include at least one of TRS subframe information and TRS bandwidth information.

In another example, if the cell connected to the terminal 2250 through the CoMP setting is a sleep mode supported NCT cell, the message processor 2261 interprets the RRC connection reestablishment message and notifies the CSI-RS of the corresponding sleep mode supported NCT cell And the QCL information for the DS can be obtained. In this case, the QCL information includes at least one of cell ID information for the QCL DS, subframe period information for the QCL DS, subframe offset information for the QCL DS, and information on the number of antenna ports for the QCL DS .

In addition, the message processor 2261 may generate the RRC connection re-establishment completion message and transmit the RRC connection re-establishment completion message to the base station 2200 through the terminal transmission unit 2270.

The CoMP control unit 2262 sets / resets the RRC-related parameters at the terminal 2250. The CoMP control unit 2262 can perform RRC-related parameter setting / reset on the terminal end based on the CoMP setting information and the QCL information included in the RRC connection re-establishment message. Here, the RRC-related parameter setting / resetting includes the CoMP setting / resetting and the QCL setting / resetting at the terminal end.

When the RRC connection re-establishment message includes the CSI-RS of the asynchronous NCT cell and the QCL information of the TRS, the CoMP control unit 2262 transmits at least one TRS subframe information included in the QCL information for CSI-RS and TRS (Or assume) a quasi co-located (QCL) state between the CSI-RS antenna ports and the TRS antenna ports based on the TRS bandwidth information.

When the RRC connection reset message includes the CSI-RS of the NCT cell supporting the sleep mode and the QCL information of the DS, the CoMP control unit 2262 controls at least one of the CSI- Based on the cell ID information for the QCL DS, the subframe period information for the QCL DS, the subframe offset information for the QCL DS, and the number of antenna ports for the QCL DS, the CSI-RS antenna ports and the DS antenna port (Or assume) the state of the QCL between them. If the dormant mode supporting NCT cell is an asynchronous NCT cell and the QCL information for the DS port and the TRS port of the corresponding NCT cell is included in the RRC connection re-establishment message, the CoMP control unit 2262 controls the DS antenna ports (Or assume) the QCL state between the TRS antenna ports. Or a CRS other than the TRS is transmitted from the sleep mode supporting NCT cell and the QCL information for the DS port and the CRS port of the corresponding NCT is included in the RRC connection re-establishment message, the CoMP control unit 2262, (Or assume) the QCL state between the ports and the CRS antenna ports.

In this case, since the terminal receiving unit 2255 can receive data and RSs in the CoMP environment and can assume the QCL relationship between the TRS or DS of the NCT cell constituting the CoMP cooperation set and the antenna ports of the CSI-RS, The physical layer signal can be smoothly received and interpreted even when the signal is received in the environment.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (20)

A base station supporting Coordination Multi-Point (CoMP)
A CoMP control unit for deciding to perform a CoMP operation for a terminal having an established RRC (Radio Resource Control) connection;
A message processing unit for generating an RRC connection reset message including CoMP setting information;
A transmitting unit for transmitting the generated RRC connection re-establishment message to the MS; And
And a receiving unit for receiving an RRC connection reestablishment completion message corresponding to the RRC connection re-establishment message from the terminal,
The RRC connection re-establishment message generated by the message processor may include QCL information indicating a quasi co-location (QCL) relationship between specific antenna ports of a new carrier type (NCT) cell connected to the UE according to the CoMP setting. The base station further comprising: The method according to claim 1,
If the NCT cell connected to the UE is an asynchronous NCT cell according to the CoMP setting, the message processor notifies the antenna ports of a Shannel State Information-Reference Signal (CSI-RS) of a corresponding asynchronous NCT cell and a Tracking Reference Signal (TRS) And generates the RRC connection re-establishment message including the QCL information for the RRC connection re-establishment message. 3. The method of claim 2,
The QCL information is at least one of TRS subframe information and TRS bandwidth information,
Wherein the message processing unit includes the QCL information in a CSI-RS-ConfigNZP information element of the RRC connection reconfiguration message. The method according to claim 1,
If the NCT cell connected to the UE according to the CoMP setting is a dormant mode supporting NCT cell, the QCL information for CSI-RS and DS (discovery siganl) antenna ports of the corresponding sleep mode supporting NCT cell is And generates the RRC connection re-establishment message including the RRC connection re-establishment message. 5. The method of claim 4,
The QCL information is at least one of cell ID information for the QCL DS, subframe period information for the QCL DS, subframe offset information for the QCL DS, and information on the number of antenna ports for the QCL DS,
Wherein the message processing unit includes the QCL information in a CSI-RS-ConfigNZP information element of the RRC connection reconfiguration message. As a terminal supporting CoMP,
A receiving unit for receiving from the base station an RRC connection reset message including CoMP setting information and QCL setting information;
A message processor for analyzing the CoMP setting information and the QCL setting information included in the RRC connection reestablishment message and generating an RRC connection reestablishment completion message;
A CoMP control unit for resetting RRC-related parameters based on the CoMP setting information and the QCL setting information; And
And a transmitter for transmitting the generated RRC connection re-establishment complete message to the base station,
Wherein the QCL setting information indicates a QCL relationship between antenna ports peculiar to an NCT cell connected to the terminal according to the CoMP setting. The method according to claim 6,
Wherein the receiver receives the RRC connection reconfiguration message including the QCL configuration information for CSI-RS and TRS antenna ports for an asynchronous NCT cell connected to the UE. 8. The method of claim 7,
The message processor analyzes the CSI-RS-ConfigNZP information element of the RRC connection re-establishment message to obtain the QCL information,
Wherein the CoMP control unit assumes a QCL state between CSI-RS antenna ports and TRS antenna ports based on at least one TRS subframe information and TRS bandwidth information included in the QCL information. Terminal. The method according to claim 6,
Wherein the receiver receives the RRC connection re-establishment message including the QCL configuration information for CSI-RS and DS antenna ports for a sleep mode supported NCT cell connected to the UE. 10. The method of claim 9,
The message processor analyzes the CSI-RS-ConfigNZP information element of the RRC connection re-establishment message to obtain the QCL information,
The CoMP control unit includes cell ID information for at least one QCL DS included in the QCL information, subframe period information for a QCL DS, subframe offset information for a QCL DS, and information on the number of antenna ports for a QCL DS , Assuming a QCL state between CSI-RS antenna ports and DS antenna ports. As a CoMP support method performed in a base station,
Determining whether to perform a CoMP operation for a terminal for which an RRC connection is established;
Generating an RRC connection reset message including CoMP setting information;
Transmitting the generated RRC connection re-establishment message to the MS; And
Receiving an RRC connection re-establishment complete message corresponding to the RRC connection re-establishment message from the terminal,
Wherein the RRC connection re-establishment message further includes QCL information indicating a QCL relationship between antenna ports peculiar to the NCT cell connected to the UE according to the CoMP setting. 12. The method of claim 11,
The RRC connection re-establishment message includes the QCL information for CSI-RS and TRS antenna ports of the asynchronous NCT cell when the NCT cell connected to the UE is an asynchronous NCT cell according to the CoMP setting. CoMP support method. 13. The method of claim 12,
Wherein the QCL information is at least one of TRS subframe information and TRS bandwidth information and is included in a CSI-RS-ConfigNZP information element of the RRC connection reconfiguration message. 12. The method of claim 11,
If the NCT cell connected to the UE is a dormant NCT cell according to the CoMP setting, the RRC connection reset message includes the QCL information for CSI-RS and DS antenna ports of the corresponding sleep mode supporting NCT cell ≪ / RTI > 15. The method of claim 14,
The QCL information is at least one of cell ID information for the QCL DS, subframe period information for the QCL DS, subframe offset information for the QCL DS, and information on the number of antenna ports for the QCL DS,
Wherein the QCL information is included in a CSI-RS-ConfigNZP information element of the RRC connection reconfiguration message. As a CoMP support method performed in a terminal,
Receiving from the base station an RRC connection reset message including CoMP setting information and QCL setting information;
Analyzing the CoMP setting information and the QCL setting information included in the RRC connection re-establishment message and generating an RRC connection re-establishment completion message;
Resetting the RRC-related parameters based on the CoMP setting information and the QCL setting information; And
And transmitting the generated RRC connection re-establishment complete message to the base station,
Wherein the QCL setting information indicates a QCL relationship between antenna ports peculiar to an NCT cell connected to the terminal according to the CoMP setting. 17. The method of claim 16,
Wherein the RRC connection re-establishment message includes the QCL configuration information for CSI-RS and TRS antenna ports for an asynchronous NCT cell connected to the UE. 18. The method of claim 17,
The QCL information is included in the CSI-RS-ConfigNZP information element of the RRC connection re-establishment message,
And the RRC-related parameters are reset based on at least one TRS subframe information and TRS bandwidth information included in the QCL information, assuming a QCL state between CSI-RS antenna ports and TRS antenna ports. , CoMP support method. 17. The method of claim 16,
Wherein the RRC connection re-establishment message includes the QCL configuration information for CSI-RS and DS antenna ports for a sleep mode supported NCT cell connected to the UE. 20. The method of claim 19,
The QCL information is included in the CSI-RS-ConfigNZP information element of the RRC connection re-establishment message,
The RRC-related parameter re-establishment may include cell ID information for at least one QCL DS included in the QCL information, subframe period information for QCL DS, subframe offset information for QCL DS, and number of antenna ports for QCL DS Information is based on assuming a QCL state between CSI-RS antenna ports and DS antenna ports.

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