KR102186529B1 - Apparatus and method for transmitting/receiving downlink data in cellular radio communication system - Google Patents

Abstract

The present invention provides a method for a base station to transmit downlink data channel signal transmission information in a cellular wireless communication system using a cooperative multi-point (CoMP) scheme, in which resources scheduled for downlink data channel signal transmission A process of transmitting downlink data channel signal transmission information including information related to elements to a user equipment (UE), and a downlink data channel signal among resource elements scheduled for transmission of the downlink data channel signal And transmitting downlink data channel signal non-transmission information including information related to resource elements not transmitted to the UE.

Description

Device and method for transmitting/receiving downlink data in a cellular wireless communication system {APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DOWNLINK DATA IN CELLULAR RADIO COMMUNICATION SYSTEM}

The present invention relates to an apparatus and method for transmitting/receiving downlink data in a cellular wireless communication system. For example, a number of base stations (BS) provide a service to a mobile station (MS) using a cooperative multi-point (CoMP, hereinafter referred to as'CoMP') method. Disclosed is an apparatus and method for transmitting/receiving downlink data channel signal transmission information in a CoMP cellular wireless communication system.

Cellular wireless communication systems are evolving to provide a variety of high-speed and large-capacity services to mobile terminals, and a representative example of such a cellular wireless communication system is high speed downlink packet access (HSDPA), hereinafter referred to as'HSDPA'. A mobile communication system, a high speed uplink packet access (HSUPA, hereinafter referred to as'HSUPA') mobile communication system, and a long term evolution (LTE, hereinafter referred to as'LTE') the La referred) mobile communication system, a long term Evolution - Advanced (long term evolution advanced: LTE-a, hereinafter referred to as 'LTE-a'), a mobile communication system and a third-generation project partnership 2 (3 ^rd generation project partnership 2: 3GPP2, hereinafter referred to as ``3GPP2'') high rate packet data (HRPD, hereinafter referred to as ``HRPD'') mobile communication system, and the International Institute of Electrical and Electronic Engineers (Institute of Electrical Engineers) and Electronics Engineers: IEEE, hereinafter referred to as'IEEE') 802.16m mobile communication system.

The LTE mobile communication system is a mobile communication system developed to efficiently support high-speed wireless packet data transmission, and can maximize the capacity of a cellular wireless communication system by utilizing various radio access (RA) technologies. In addition, the LTE-A mobile communication system is a mobile communication system that improves the LTE mobile communication system, and has improved data transmission capability compared to the LTE mobile communication system.

Existing 3G wireless packet data communication systems such as the HSDPA mobile communication system, the HSUPA mobile communication system, and the HRPD mobile communication system have adaptive modulation and coding (AMC, hereinafter referred to as'AMC') to improve transmission efficiency. AMC') and channel adaptation scheduling are used. When using the AMC scheme and the channel responsive scheduling scheme, the signal transmission apparatus may receive partial channel state feedback information from the signal reception apparatus and use an optimal modulation scheme and coding scheme at the most efficient timing.

In the wireless packet data communication system using the AMC scheme, the signal transmission apparatus may adjust the amount of transmitted data packets according to channel conditions. That is, when the channel condition is poor, the signal transmission apparatus may reduce the amount of transmitted data packets to maintain a reception error probability as a target reception error probability targeted by the signal transmission apparatus. On the contrary, when the channel state is good, the signal transmission apparatus can effectively transmit many data packets while maintaining a reception error probability as a target reception error probability by increasing the amount of transmitted data packets.

In addition, in the wireless packet data communication system using the channel adaptive scheduling scheme, the signal transmission device selects a mobile terminal having a good channel state among a plurality of mobile terminals and provides a service to the selected mobile terminal. System capacity increases compared to the case of allocating a channel to a terminal and providing a service. This increase in system capacity is referred to as'multi-user diversity gain'.

When the AMC scheme is used together with a multiple input multiple output (MIMO) transmission scheme, it may also include a function of determining the number or rank of spatial layers of a transmitted signal. In this case, the wireless packet data communication system using the AMC scheme not only considers only the code rate and the modulation scheme to determine the optimal data rate, but also several layers using the MIMO scheme. It also considers the transmission to layers.

Meanwhile, in general, compared to a code division multiple access (CDMA, hereinafter referred to as'CDMA') scheme, orthogonal frequency division multiple access (OFDMA), hereinafter referred to as'OFDMA'. It is well known that the system capacity can be expected to increase when the) method is used.

When using the OFDMA scheme, one of the various reasons for increasing the system capacity is that the frequency domain scheduling scheme can be performed. As a capacity gain is obtained by using a channel adaptive scheduling method according to a characteristic that a channel state changes over time, a larger capacity gain can be obtained when a characteristic that a channel state changes according to a frequency is used. Accordingly, in recent next-generation cellular wireless communication systems, research is being actively conducted to convert the CDMA method, which is a multiple access method used in the second and third generation cellular wireless communication systems, to the OFDMA method. In addition, 3GPP and 3GPP2 began to proceed with a standardization project related to an evolved cellular wireless communication system using OFDMA.

Hereinafter, a structure of a radio frame of a general LTE-A mobile communication system will be described with reference to FIG. 1.

1 is a diagram schematically showing a radio frame structure of a general LTE-A mobile communication system.

Referring to FIG. 1, one radio frame includes 10 subframes, and each of the 10 subframes includes 2 slots. Accordingly, an index (not shown) from 0 to 9 is allocated to 10 subframes included in 1 frame, and 0 to 20 slots included in 1 subframe as shown in FIG. Indexes from to 19 (#0 to #19) are allocated.

In FIG. 1, a radio frame structure of a general LTE-A mobile communication system has been described, and next, a structure of a general cellular radio communication system will be described with reference to FIG. 2.

2 is a diagram schematically showing the structure of a general cellular wireless communication system.

Prior to describing FIG. 2, in the cellular wireless communication system shown in FIG. 2, a transmission/reception antenna is disposed at the center of each cell.

2, in a cellular wireless communication system including a plurality of cells, a specific user equipment (UE) is from one cell selected for a relatively long period of time, for example, during a semi-static period. A wireless communication service using a number of methods as described above is provided. For example, it is assumed that the cellular wireless communication system includes three cells, for example, a total of three cells: a cell 100, a cell 110, and a cell 120. In addition, the cell 100 provides a wireless communication service to the user terminal 101 and the user terminal 102 located in the cell 100, and the cell 110 provides a wireless communication service to the user terminal 111. And the cell 120 provides a wireless communication service to the user terminal 121. In addition, reference numerals 130, 131, and 132 denote a base station that manages service areas of the cell 100, cell 110, and cell 120, respectively.

On the other hand, the user terminal 102 receiving a wireless communication service using the cell 100 is located at a relatively far distance from the base station 130 when compared to the user terminal 101. In addition, since the user terminal 102 experiences relatively large interference from the base station 132 that manages the service area of the cell 120, which is another cell, the data transmission rate supported by the cell 100 is relatively slow. .

In addition, when the cells 100, 110, and 120 independently provide wireless communication services, a base station that manages the service areas of each of the cells 100, 110, and 120 to enable a specific user terminal to measure the downlink channel state for each cell. Transmits a reference signal (RS). And, when the cellular radio communication system is a 3GPP LTE-A mobile communication system, the RS is a cell-specific reference signal (CRS, hereinafter referred to as'CRS') or a channel state information reference signal ( channel status information reference signal: CSI-RS, hereinafter will be referred to as'CSI-RS').

Meanwhile, in the case of a 3GPP LTE-A mobile system, the UE measures the channel state between the base station and the UE using a CRS or CSI-RS transmitted by the base station, and feeds back channel state information indicating the measured channel state to the base station. do.

Meanwhile, whether the reference signal to be used by the UE for channel measurement is a CRS or a CSI-RS is transmitted through transmission mode information notified by the base station to the UE.

In addition, in the 3GPP LTE-A mobile system, the UE uses a CRS transmitted by the base station or a demodulation reference signal (demodulation reference signal: DM-RS, hereinafter referred to as'DM-RS') to provide a channel between the base station and the UE. A state is estimated, and downlink data is detected by performing a demodulation operation using the estimated channel state. Whether the reference signal to be used by the UE for the demodulation operation is a CRS or a DM-RS is transmitted through transmission mode information notified by the base station to the UE.

In FIG. 2, the structure of a general cellular wireless communication system has been described, and next, with reference to FIG. 3, a location where a CSI-RS is transmitted in a resource block of a general LTE-A mobile communication system will be described. .

3 is a diagram schematically illustrating a location at which a CSI-RS is transmitted in a resource block of a general LTE-A mobile communication system.

Each block shown in FIG. 3 represents a resource element (resource element: RE, hereinafter referred to as'RE') included in the resource block. Referring to FIG. 3, first, a vertical axis indicates a subcarrier index (index). And the horizontal axis represents orthogonal frequency division multiplexing (OFDM, hereinafter referred to as'OFDM') symbol time.

In addition, CSI-RSs for classifying two CSI-RS antenna ports may be transmitted in each of the REs 200-219. That is, a specific base station broadcasts two CSI-RSs for downlink measurement in the RE 200. In the case of a cellular radio communication system including a plurality of cells as described in FIG. 2, a separate RE is allocated within a resource block for each cell, and a CSI-RS is transmitted from the allocated RE. For example, in the cell 100 described in FIG. 2, the CSI-RS is transmitted from the RE 200, the CSI-RS is transmitted from the RE 205 in the cell 110, and the RE 210 in the cell 120 CSI-RS can be transmitted in. As described above, in a general LTE-A mobile communication system, transmitting CSI-RSs using different time resources and frequency resources for each cell is to prevent mutual interference between CSI-RSs.

Meanwhile, the subframe in which the CSI-RS is transmitted in the downlink may be determined using I _CSI-RS , which is a parameter transmitted through a radio resource control (RRC, hereinafter referred to as'RRC') message. . When the user terminal receives the I _CSI-RS , the period T _CSI-RS of the subframe in which the CSI-RS is transmitted and the offset Δ of the subframe in which the CSI-RS is transmitted using the following <Table 1> Determine the _CSI-RS .

Then, the user terminal receives a CSI-RS in a subframe that satisfies the condition as shown in Equation 1 below.

In Equation 1, n _f denotes a radio frame number (RFN) and n _s denotes a slot number within a radio frame.

In addition, referring to FIG. 3, a DM-RS may be transmitted at the positions of the RE 220 and the RE 221. When two or less DM-RS transmission ports are used for data transmission targeting a specific UE, DM-RS is transmitted only in the RE 220, and unlike this, more than two for data transmission targeting a specific UE. When the DM-RS transmission ports are used, the DM-RS is transmitted in both the RE 220 and the RE 221.

Also, referring to FIG. 3, a CRS may be transmitted from the RE 231. CRS is transmitted in part or all of the RE 231 according to the number of CRS transmission ports used by a specific cell. And the CRS transmission timing may be different for each cell. That is, in the case of FIG. 3, it is shown that the CRS is transmitted at intervals of 3 starting from a subcarrier having a subcarrier index 0, but the starting position of CRS transmission determined for each cell is a cell identifier assigned for each cell. It goes without saying that it may be determined by applying a modulo operation to the (cell-ID) value. For example, the start position of CRS transmission may be determined with the value of Cell-ID mod 6.

Meanwhile, the UE is a CSI-RS resource, a DM-RS resource, a CRS resource, and a control channel resource in downlink data, for example, a downlink physical shared channel (PDSCH), hereinafter referred to as'PDSCH'. After assuming that signal transmission does not occur, a PDSCH signal received through the corresponding resource among the remaining resources is received.

In addition, in addition to the case where the reference signal is transmitted, downlink data transmission does not occur through a resource through which a synchronization signal or a physical broadcast channel (PBCH, hereinafter referred to as'PBCH') signal is transmitted. For example, the synchronization signal is transmitted only through some OFDM symbols in subframes corresponding to subframe number 0 and subframe number 5, and the PBCH signal is transmitted only through some OFDM symbols of subframe corresponding to subframe number 0. do. Here, the specific synchronization signal and PBCH transmission location follow the related standard of the LTE-A mobile communication system, and thus a detailed description thereof will be omitted.

In addition, in the LTE-A mobile system, each subframe may be set as a multimedia broadcast multicast service single frequency network (multimedia broadcast multicast service single frequency network: MBSFN, hereinafter referred to as'MBSFN') subframe. When the subframe is set as the MBSFN subframe, the CRS is not transmitted outside the control channel resource in the subframe.

In addition, the MBSFN subframe is configured for each cell, and each cell may have a different MBSFN subframe configuration. The MBSFN subframe may be used for a physical multicast channel (PMCH, hereinafter referred to as'PMCH') or PDSCH transmission, and when the MBSFN subframe is used for PMCH transmission, the MBSFN is a reference signal. While a reference signal is transmitted, when the MBSFN subframe is used for PDSCH transmission, only DM-RS and CSI-RS may be transmitted as reference signals.

In the LTE-A mobile communication system that assumes the transmit/receive antennas arranged at the center for each cell of FIG. 2, the UE may detect a synchronization signal to detect a subframe number, and then PBCH signal and cell-related information, for example, By receiving a system information block (SIB, hereinafter referred to as'SIB'), it is possible to detect the configuration information of the MBSFN subframe and resource information through which CRS and CSI-RS are transmitted, and are transmitted through a control channel. The location information of the DM-RS resource may be detected by using the PDSCH scheduling information. Through this, each UE can receive downlink data by accurately identifying the location of a resource for transmitting a PDSCH signal.

Meanwhile, in an LTE-A mobile communication system that assumes transmission/reception antennas arranged in the center for each cell as described in FIG. 2, a user terminal may detect a synchronization signal to detect a system frame number (SFN). , PBCH signals and SIB messages may be received to identify subframes in which CSI-RS is transmitted, and subframes in which CSI-RS is not transmitted due to collision with subframes in which paging message and system information are transmitted.

Meanwhile, in the cellular wireless communication system as described in FIG. 2, a user terminal located in a boundary area of a cell has a limitation in receiving a high data rate due to a large amount of interference from other cells. That is, in the cellular wireless communication system as described in FIG. 2, the transmission rate of a high-speed data service provided to user terminals existing in a cell is greatly affected by where the user terminal is located in the cell. Therefore, in a general cellular wireless communication system, data can be transmitted and received using a relatively high transmission rate with a user terminal located relatively close to the cell center, but a high transmission rate is guaranteed for a user terminal located relatively far from the cell center. it's difficult.

In this way, in order to provide a data service at a high data rate to user terminals located in the cell boundary area and to expand a service area that provides a high data rate, in the LTE-A mobile communication system, a plurality of cells cooperate with specific user terminals. A CoMP scheme has been proposed that provides a communication service by using.

Meanwhile, in order to efficiently use the CoMP scheme in an LTE-A mobile communication system, a reference signal resource, a synchronization signal resource, and a physical broadcast channel (PBCH) allocated from each of a plurality of cells. Channel, hereinafter referred to as'PBCH') A method of receiving a downlink data channel signal, for example, a downlink physical shared channel (PDSCH: Physical Downlink Shared Channel, hereinafter referred to as'PDSCH') signal in consideration of resources This becomes necessary. Here, the reference signal resource represents a resource through which a reference signal is transmitted, a synchronization signal resource represents a resource through which a synchronization signal is transmitted, and the PBCH resource represents a resource through which a PBCH signal is transmitted.

However, in the case of using the CoMP scheme in the LTE-A mobile communication system, a subframe in which a PDSCH signal is transmitted and a PDSCH signal are transmitted among subframes transmitted from each of a plurality of cells in order for the user terminal to efficiently receive the PDSCH signal. There is a need for a method of classifying subframes that do not exist.

The present invention proposes an apparatus and method for transmitting/receiving information related to downlink data in a cellular wireless communication system.

In addition, the present invention proposes an apparatus and method for transmitting/receiving information related to downlink data so that a signal receiving device receives downlink data in consideration of a resource through which a CRS is transmitted in a cellular wireless communication system.

In addition, the present invention proposes an apparatus and method for transmitting/receiving information related to downlink data so that a signal receiving apparatus in a cellular wireless communication system receives downlink data in consideration of resources through which CSI-RS is transmitted.

In addition, the present invention proposes an apparatus and method for transmitting/receiving information related to downlink data so that a signal receiving apparatus receives downlink data in consideration of system information transmission in a cellular wireless communication system.

In addition, the present invention proposes an apparatus and a method for transmitting/receiving information related to downlink data so that a signal receiving apparatus receives downlink data in consideration of a resource through which a synchronization signal is transmitted in a cellular wireless communication system.

In addition, the present invention proposes an apparatus and method for transmitting/receiving information related to downlink data so that a signal receiving apparatus receives downlink data in consideration of a resource through which a PBCH signal is transmitted in a cellular wireless communication system.

In addition, the present invention proposes an apparatus and method for transmitting/receiving information related to downlink data so that a signal receiving device receives downlink data in consideration of a resource through which a DM-RS is transmitted in a cellular wireless communication system.

In the present invention, in a cellular wireless communication system, a signal receiving apparatus includes a system information-radio network temporary identifier (SI-RNTI, hereinafter referred to as'SI-RNTI'), and a paging wireless network temporary identifier ( paging-radio network temporary identifier: P-RNTI, hereinafter referred to as'P-RNTI') and cell-radio network temporary identifier (C-RNTI, hereinafter referred to as'C-RNTI') ), a semi-persistent scheduling cell-radio network temporary identifier (SPS-C-RNTI, hereinafter referred to as'SPS-C-RNTI'), and a random access wireless network temporary Transmitting/receiving downlink data channel signal transmission information to receive a downlink data channel signal in consideration of at least one of the identifiers (random access radio network temporary identifier: RA-RNTI, hereinafter referred to as'RA-RNTI') We propose an apparatus and method.

In addition, the present invention is a downlink data channel so that a signal receiving apparatus in a cellular wireless communication system receives a downlink data channel signal in consideration of a format of downlink control information (DCI, hereinafter referred to as'DCI'). A device and method for transmitting/receiving signal transmission information is proposed.

In addition, the present invention proposes an apparatus and method for transmitting/receiving downlink data channel signal transmission information so that a signal receiving apparatus receives a downlink data channel signal in consideration of CoMP-related scheduling information in a cellular wireless communication system.

In addition, the present invention proposes an apparatus and method for transmitting/receiving downlink data channel signal transmission information for each of downlink data channel signals transmitted by a plurality of signal transmission devices in a cellular wireless communication system.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a CRS is transmitted in a cellular wireless communication system. It proposes a receiving apparatus and method.

In addition, the present invention provides downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a CSI-RS is transmitted in a cellular wireless communication system. We propose an apparatus and method for transmitting/receiving.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal reception device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of system information transmission. We propose an apparatus and method.

In addition, the present invention transmits downlink data channel signal transmission information so that a signal receiving device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a synchronization signal is transmitted. /Suggest a device and method for receiving.

In addition, the present invention transmits downlink data channel signal transmission information so that a signal receiving device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a PBCH signal is transmitted. /Suggest a device and method for receiving.

In addition, the present invention provides downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a DM-RS is transmitted in a cellular wireless communication system. We propose an apparatus and method for transmitting/receiving.

In addition, in the present invention, a signal receiving apparatus in a cellular wireless communication system considers at least one of SI-RNTI, P-RNTI, C-RNTI, SPS-C-RNTI, and RA-RNTI. An apparatus and method for transmitting/receiving downlink data channel signal transmission information so as to receive each of the downlink data channel signals transmitted by them is proposed.

In addition, the present invention is an apparatus for transmitting/receiving downlink data channel signal transmission information so that a signal receiving device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a DCI format in a cellular wireless communication system. And a method.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal receiving device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of CoMP-related scheduling information in a cellular wireless communication system. It proposes a device and method to perform.

A method according to an embodiment of the present disclosure, in a method by a user terminal (UE) in a communication system, including first information on resources to be excluded for a downlink physical shared channel (PDSCH) in a serving cell. A process of receiving configuration information, a process of receiving a signaling message including second information indicating a plurality of start symbols related to the PDSCH, and a process of receiving control information for scheduling the PDSCH, wherein the control The information includes a first information field indicating one start symbol among the plurality of start symbols, and receiving downlink data on the resource of the PDSCH based on the start symbol indicated by the first information field. A process, wherein the resource of the PDSCH is determined based on the first information in the configuration information, and the start symbol is based on the second information in the signaling message and the first information field in the control information. Is identified.

In a method according to an embodiment of the present disclosure, in a method by a base station in a wireless communication system, configuration information including first information on resources to be excluded for a downlink physical shared channel (PDSCH) in a serving cell is provided. A process of transmitting, a process of transmitting a signaling message including second information indicating a plurality of start symbols related to the PDSCH, and a process of transmitting control information for scheduling the PDSCH, wherein the control information is the Includes a first information field indicating one start symbol among a plurality of start symbols, and includes a process of transmitting downlink data on a resource of the PDSCH based on the start symbol indicated by the first information field. In this case, the resource of the PDSCH is determined based on the first information in the configuration information, and the start symbol is identified based on the second information in the signaling message and the first information field in the control information.

An apparatus according to an embodiment of the present disclosure includes first information on resources to be excluded for a downlink physical shared channel (PDSCH) in a serving cell in an apparatus of a user terminal (UE) in a wireless communication system. Receiving configuration information, receiving a signaling message including second information indicating a plurality of start symbols related to the PDSCH, and receiving control information for scheduling the PDSCH, wherein the control information is the plurality of start A receiver that includes a first information field indicating one start symbol among symbols, and receives downlink data on a resource of the PDSCH based on the start symbol indicated by the first information field, and the configuration information And a controller configured to determine a resource of the PDSCH based on the first information in the signaling message, and to identify the start symbol based on the second information in the signaling message and the first information field in the control information.

An apparatus according to an embodiment of the present disclosure transmits, in an apparatus of a base station in a wireless communication system, configuration information including first information on resources to be excluded for a downlink physical shared channel (PDSCH) in a serving cell. And transmitting a signaling message including second information indicating a plurality of start symbols related to the PDSCH, and transmitting control information for scheduling the PDSCH, wherein the control information is one of the plurality of start symbols A transmitter that transmits downlink data on a resource of the PDSCH based on the start symbol indicated by the first information field, and the first information field in the configuration information And a controller configured to determine the resource of the PDSCH based on the information, and to identify the start symbol based on the second information in the signaling message and the first information field in the control information.

The present invention makes it possible to transmit/receive information related to downlink data in a cellular wireless communication system.

In addition, the present invention enables a signal receiving apparatus in a cellular wireless communication system to transmit/receive information related to downlink data so as to receive downlink data in consideration of resources through which CRS is transmitted.

In addition, the present invention enables a signal receiving apparatus in a cellular wireless communication system to transmit/receive information related to downlink data so as to receive downlink data in consideration of resources through which CSI-RS is transmitted.

In addition, the present invention enables a signal receiving apparatus to transmit/receive information related to downlink data so as to receive downlink data in consideration of system information transmission in a cellular wireless communication system.

In addition, the present invention enables a signal receiving apparatus to transmit/receive information related to downlink data so as to receive downlink data in consideration of a resource through which a synchronization signal is transmitted in a cellular wireless communication system.

In addition, the present invention enables a signal receiving apparatus to transmit/receive information related to downlink data so as to receive downlink data in consideration of a resource through which a PBCH signal is transmitted in a cellular wireless communication system.

In addition, the present invention enables a signal receiving apparatus in a cellular wireless communication system to transmit/receive information related to downlink data so as to receive downlink data in consideration of a resource through which a DM-RS is transmitted.

In addition, the present invention provides a system information-radio network temporary identifier (SI-RNTI, hereinafter referred to as'SI-RNTI') and a paging wireless network temporary identifier in a cellular wireless communication system. An identifier (paging-radio network temporary identifier: P-RNTI, hereinafter referred to as'P-RNTI') and a cell-radio network temporary identifier (C-RNTI, hereinafter referred to as'C-RNTI') ), a semi-persistent scheduling cell-radio network temporary identifier (SPS-C-RNTI, hereinafter referred to as'SPS-C-RNTI'), and random access radio Transmitting downlink data channel signal transmission information to receive a downlink data channel signal in consideration of at least one of a network temporary identifier (random access radio network temporary identifier: RA-RNTI, hereinafter referred to as'RA-RNTI') It has the effect of making it possible to receive.

In addition, the present invention is a downlink data channel so that a signal receiving apparatus in a cellular wireless communication system receives a downlink data channel signal in consideration of a format of downlink control information (DCI, hereinafter referred to as'DCI'). There is an effect of making it possible to transmit/receive signal transmission information.

In addition, the present invention has the effect of enabling a signal receiving apparatus to transmit/receive downlink data channel signal transmission information to receive a downlink data channel signal in consideration of CoMP-related scheduling information in a cellular wireless communication system.

In addition, the present invention has the effect of enabling transmission/reception of downlink data channel signal transmission information for each of the downlink data channel signals transmitted by a plurality of signal transmission devices in a cellular wireless communication system.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a CRS is transmitted in a cellular wireless communication system. It has the effect of making it possible to receive.

In addition, the present invention provides downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a CSI-RS is transmitted in a cellular wireless communication system. It has the effect of making it possible to transmit/receive.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal reception device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of system information transmission. It has the effect of making it possible.

In addition, the present invention transmits downlink data channel signal transmission information so that a signal receiving device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a synchronization signal is transmitted. /It has the effect of making it possible to receive.

In addition, the present invention transmits downlink data channel signal transmission information so that a signal receiving device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a PBCH signal is transmitted. /It has the effect of making it possible to receive.

In addition, the present invention provides downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a DM-RS is transmitted in a cellular wireless communication system. It has the effect of making it possible to transmit/receive.

In addition, in the present invention, a signal receiving apparatus in a cellular wireless communication system considers at least one of SI-RNTI, P-RNTI, C-RNTI, SPS-C-RNTI, and RA-RNTI. There is an effect of enabling transmission/reception of downlink data channel signal transmission information so as to receive each of the downlink data channel signals transmitted by them.

In addition, the present invention is directed to transmitting/receiving downlink data channel signal transmission information so that a signal receiving device receives each of the downlink data channel signals transmitted by a plurality of signal transmitting devices in consideration of a DCI format in a cellular wireless communication system. It has the effect of making it possible.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal receiving device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of CoMP-related scheduling information in a cellular wireless communication system. It has the effect of making it possible to do it.

1 is a diagram schematically showing a radio frame structure of a general LTE-A mobile communication system
2 is a diagram schematically showing the structure of a general cellular wireless communication system
3 is a diagram schematically showing a location at which a CSI-RS is transmitted in a resource block of a general LTE-A mobile communication system
4 is a diagram schematically showing the structure of a cellular wireless communication system according to an embodiment of the present invention
5 is a diagram schematically showing a location of a CSI-RS resource through which a CSI-RS is transmitted in a resource block of a cellular radio communication system according to an embodiment of the present invention
6 is a diagram schematically showing a method of allocating CRS resources in a cellular wireless communication system according to an embodiment of the present invention
7 is a diagram illustrating a subframe structure when different MBSFN subframe configurations are used in two cells in a cellular wireless communication system according to an embodiment of the present invention
FIG. 8 is a diagram showing a subframe structure when two cells use different subframe indexes in a cellular wireless communication system according to an embodiment of the present invention
9 is a flowchart schematically illustrating a process of receiving a PDSCH signal by a UE in a cellular radio communication system according to the first embodiment of the present invention
10 is a flowchart illustrating a process of receiving a PDSCH signal by a UE in a cellular wireless communication system according to a second embodiment of the present invention
11 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a third embodiment of the present invention
12 is a flowchart illustrating a process of receiving a PDSCH signal by a UE in a cellular wireless communication system according to a fourth embodiment of the present invention
13 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a fifth embodiment of the present invention
14 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a sixth embodiment of the present invention
15 is a flowchart illustrating a process in which a UE receives a PDSCH signal in a wireless communication system according to a seventh embodiment of the present invention.
16 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a ninth embodiment of the present invention
17 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a tenth embodiment of the present invention
18 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to an eleventh embodiment of the present invention
19 is a diagram schematically showing an internal structure of a UE in a cellular wireless communication system according to an embodiment of the present invention
20 is a diagram schematically showing an internal structure of a central control device in a cellular wireless communication system according to an embodiment of the present invention

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

The present invention proposes an apparatus and method for transmitting/receiving information related to transmission of downlink data in a cellular wireless communication system.

In addition, according to the present invention, in a cellular wireless communication system, a signal receiving apparatus receives a downlink data channel signal in consideration of a resource through which a cell-specific reference signal (CRS, hereinafter referred to as'CRS') is transmitted. Thus, an apparatus and method for transmitting/receiving downlink data channel signal transmission information are proposed.

In addition, according to the present invention, a signal receiving apparatus in a cellular wireless communication system considers a resource through which a channel status information reference signal (CSI-RS, hereinafter referred to as'CSI-RS') is transmitted. An apparatus and method for transmitting/receiving downlink data channel signal transmission information to receive a data channel signal is proposed.

In addition, the present invention proposes an apparatus and method for transmitting/receiving downlink data channel signal transmission information so that a signal receiving apparatus receives a downlink data channel signal in consideration of system information transmission in a cellular wireless communication system. .

In addition, the present invention is an apparatus and method for transmitting/receiving downlink data channel signal transmission information so that a signal receiving apparatus receives a downlink data channel signal in consideration of a resource through which a synchronization signal is transmitted in a cellular wireless communication system. Suggest.

In addition, according to the present invention, in a cellular wireless communication system, a signal receiving device downlinks to receive a downlink data channel signal in consideration of a resource through which a physical broadcast channel (PBCH, hereinafter referred to as'PBCH') signal is transmitted. A device and method for transmitting/receiving link data channel signal transmission information is proposed.

In addition, according to the present invention, a signal receiving apparatus in a cellular wireless communication system considers a resource through which a demodulation reference signal (DM-RS, hereinafter referred to as'DM-RS') is transmitted. An apparatus and method for transmitting/receiving downlink data channel signal transmission information to be received are proposed.

In addition, the present invention is a system information radio network temporary identifier (system information-radio network) in a cellular wireless communication system using a cooperative multi-point (CoMP, hereinafter referred to as'CoMP') scheme. a temporary identifier: SI-RNTI, hereinafter referred to as'SI-RNTI'), a paging-radio network temporary identifier (P-RNTI, hereinafter referred to as'P-RNTI'), Cell radio network temporary identifier (cell-radio network temporary identifier: C-RNTI, hereinafter referred to as'C-RNTI') and a semi-persistent scheduling cell-radio network temporary identifier (Semi-Persistent Scheduling cell-radio network temporary identifier: SPS-C-RNTI, hereinafter referred to as'SPS-C-RNTI') and a random access radio network temporary identifier (RA-RNTI, hereinafter referred to as'RA-RNTI') An apparatus and method for transmitting/receiving downlink data channel signal transmission information to receive a downlink data channel signal in consideration of at least one of them is proposed.

In addition, the present invention is a downlink data channel so that a signal receiving apparatus in a cellular wireless communication system receives a downlink data channel signal in consideration of a format of downlink control information (DCI, hereinafter referred to as'DCI'). A device and method for transmitting/receiving signal transmission information is proposed.

In addition, the present invention proposes an apparatus and method for transmitting/receiving downlink data channel signal transmission information so that a signal receiving device receives a downlink data channel signal in consideration of CoMP-related scheduling information in a cellular wireless communication system. The present invention proposes an apparatus and method for transmitting/receiving downlink data channel signal transmission information for each of downlink data channel signals transmitted by a plurality of signal transmission devices in a cellular wireless communication system.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a CRS is transmitted in a cellular wireless communication system. It proposes a receiving apparatus and method.

In addition, the present invention provides downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a CSI-RS is transmitted in a cellular wireless communication system. We propose an apparatus and method for transmitting/receiving.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal reception device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of system information transmission. We propose an apparatus and method.

In addition, the present invention transmits downlink data channel signal transmission information so that a signal receiving device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a synchronization signal is transmitted. /Suggest a device and method for receiving.

In addition, the present invention transmits downlink data channel signal transmission information so that a signal receiving device in a cellular wireless communication system receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a PBCH signal is transmitted. /Suggest a device and method for receiving.

In addition, the present invention provides downlink data channel signal transmission information so that a signal reception device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a resource through which a DM-RS is transmitted in a cellular wireless communication system. We propose an apparatus and method for transmitting/receiving.

In addition, in the present invention, a signal receiving apparatus in a cellular wireless communication system considers at least one of SI-RNTI, P-RNTI, C-RNTI, SPS-C-RNTI, and RA-RNTI. An apparatus and method for transmitting/receiving downlink data channel signal transmission information so as to receive each of the downlink data channel signals transmitted by them is proposed.

In addition, the present invention is an apparatus for transmitting/receiving downlink data channel signal transmission information so that a signal receiving device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of a DCI format in a cellular wireless communication system. And a method.

In addition, the present invention transmits/receives downlink data channel signal transmission information so that a signal receiving device receives each of the downlink data channel signals transmitted by a plurality of signal transmission devices in consideration of CoMP-related scheduling information in a cellular wireless communication system. It proposes a device and method to perform.

In the following description, the apparatus and method for transmitting/receiving downlink data channel signal transmission information proposed in the present invention is based on an orthogonal frequency division multiplexing (OFDM, hereinafter referred to as'OFDM') scheme. Long term evolution-advanced (LTE-A, hereinafter referred to as'LTE-A') mobile communication system is described as an example, but transmission/reception of downlink data channel signal transmission information proposed by the present invention The apparatus and method include not only the LTE-A mobile communication system but also a high speed downlink packet access (HSDPA, hereinafter referred to as'HSDPA') mobile communication system, and a high speed uplink packet access. packet access: HSUPA, hereinafter referred to as'HSUPA') mobile communication system, long term evolution (LTE, hereinafter referred to as'LTE') mobile communication system, 3G project partnership 2 (3rd ^rd generation project partnership 2: 3GPP2, hereinafter referred to as '3GPP2') high rate packet data (HRPD, hereinafter referred to as'HRPD') mobile communication system, and the International Institute of Electrical and Electronic Engineers (Institute of Electrical and Electronics Engineers: IEEE, hereinafter referred to as'IEEE') Of course, it can be used in other cellular wireless communication systems such as 802.16m mobile communication systems.

In addition, in the following description, it is assumed that the LTE-A mobile communication system in which the apparatus and method for transmitting/receiving downlink data channel signal transmission information proposed in the present invention is used provides a service to a user terminal using the CoMP scheme. It is assumed that the downlink data channel signal is, for example, a downlink physical shared channel (PDSCH, hereinafter referred to as'PDSCH') signal.

The cellular wireless communication system is implemented by arranging a plurality of cells in a limited area, and each cell provides a wireless communication service to user terminals in the cell through a base station (BS) that provides a wireless communication service within the cell. to provide. In this case, a specific user terminal is provided with a wireless communication service only from one cell determined semi-statically. In this way, a method of receiving a wireless communication service through only one base station is referred to as a non-cooperative multi-point (non-CoMP, hereinafter referred to as'non-CoMP') method.

In a cellular wireless communication system using a non-CoMP scheme, the high-speed data transmission rate provided to all user terminals in a cell greatly varies depending on where the user terminal is located in the cell. That is, a user terminal located in the center of a cell can receive a relatively high data rate, but it is difficult for a user terminal located in a cell boundary region to receive a high data rate.

The CoMP scheme is a scheme in which a plurality of cells cooperate with each other to provide a service to a user terminal located in a cell boundary area.In the case of a cellular wireless communication system using the CoMP scheme, a cellular wireless communication using the non-CoMP scheme It is possible to provide an improved wireless communication service compared to the system. Hereinafter, for convenience of description, a cellular wireless communication system using the CoMP method will be referred to as a'cellular CoMP wireless communication system', and a cellular wireless communication system using a non-CoMP method will be referred to as a'cellular non-CoMP wireless communication system'. To

In embodiments of the present invention, for example, dynamic cell selection (DS, hereinafter referred to as'DS'), which is a typical CoMP scheme, dynamic cell selection and blanking (dynamic cell selection with dynamic blanking: DS/DB) , Hereinafter referred to as'DS/DB') method, and a joint transmission (joint transmission: JT, hereinafter referred to as'JT') method, coordinated scheduling/coordinated beamforming: CS/CB , Hereinafter referred to as'CS/CB'), and the like, a method for transmitting/receiving PDSCH signal transmission information enabling a user terminal to efficiently receive PDSCH signals transmitted from a plurality of cells is proposed.

In the DS scheme, the user terminal measures a channel state for each cell, transmits feedback information indicating the measured channel state to a base station, and the base station receiving the feedback information targets the user terminal. (downlink) This is a method of transmitting data by dynamically selecting a cell to transmit data.

The DS/DB method prevents the specific cell from transmitting data in order to reduce the interference that a specific cell affects other cells, and the JT method simultaneously transmits data from multiple cells to a specific user terminal. to be.

The CS/CB scheme is a scheme in which cooperating cells cooperate in a direction to reduce interference with each other to schedule data and form a beam.

In embodiments of the present invention, the PDSCH signal reception of the user terminal can be efficiently used in the LTE-A mobile communication system using the CoMP scheme, such as the DS scheme, the DS/DB scheme, the JT scheme, and the CS/CB scheme. The scheme is designed so that a user terminal can efficiently receive a PDSCH signal in a cellular CoMP wireless communication system.

Hereinafter, a structure of a cellular wireless communication system according to an embodiment of the present invention will be described with reference to FIG. 4.

4 is a diagram schematically showing the structure of a cellular CoMP wireless communication system according to an embodiment of the present invention.

Referring to FIG. 4, the cellular CoMP wireless communication system includes, for example, three cells, each cell denotes a data transmission area in which a specific transmission point can provide a service, and each transmission point is a macro. A remote radio head that uses a macro base station and a cell identifier (identifier: ID, hereinafter referred to as'ID') (hereinafter referred to as'Cell-ID') in common within the area: RRH), and each transmission point may be a macro cell or a pico cell using a different Cell-ID.

In an embodiment of the present invention, a central control apparatus (CCA, hereinafter referred to as'CCA') transmits/receives data to/from a user terminal, and a base station capable of processing the transmitted/received data. station: refers to a device such as a BS) or a base station controller (BSC). Here, when each transmission point is an RRH using a macro base station and a Cell-ID in common, the macro base station may be referred to as a central control device. In addition, when each transmission point is a macro cell or a pico cell using a different cell-ID, a device that integrates and manages the cells may be referred to as a central control device.

In addition, in FIG. 4, the cellular CoMP wireless communication system includes three cells 300, 310, and 320, user terminals 301, 311, and 321 receiving data from the nearest cell, and the cells 300, 310, and 320) includes a user terminal 302 that receives data from each using the CoMP scheme. Each of the terminals 301, 311, and 321 receiving data from the nearest cell estimates the channel state of the cell in which it is located using a reference signal, that is, a CSI-RS, and a feedback including the channel estimation result The information is transmitted to the central control device 330. In FIG. 4, reference numerals 331, 332, and 333 denote a base station that manages each of the cells 300, 310, and 320, and each of the base stations 331, 332, and 333 can communicate with the central control device 330. have.

In FIG. 4, a user terminal 302 that receives data transmitted from the three cells 300, 310, and 320 using the CoMP method is a cell specificity transmitted from all of the three cells 300, 310, and 320. (cell specific) It is necessary to estimate the channel state of each cell using CSI-RSs. Therefore, for the channel estimation operation performed by the user terminal 302, the central control apparatus 330 allocates three CSI-RS resources corresponding to each cell to the user terminal 302.

Hereinafter, a method of allocating CSI-RS resources to the user terminal 302 by the central control device 330 will be described with reference to FIG. 5.

FIG. 5 is a diagram schematically illustrating a location of a CSI-RS resource through which a CSI-RS is transmitted in a resource block of a cellular wireless communication system according to an embodiment of the present invention.

Each block shown in FIG. 5 represents a resource element (resource element: RE, hereinafter referred to as'RE') included in the resource block.

Referring to FIG. 5, the central control device 330 uses a CoMP method to allow a user terminal 302 receiving a CSI-RS to estimate a channel of each of the three cells 300, 310, and 320, and control Allocating three CSI-RS resources (401, 402, 403) to estimate the channel on which information and system information are transmitted, and using the three CSI-RS resources (401, 402, 403) CSI-RS To send. That is, the CSI-RS resource in which the CSI-RS for channel estimation of the cell 300 is transmitted is a resource element indicated by reference number 401, and the CSI-RS for channel estimation of the cell 310 is transmitted. Is a resource element indicated by reference number 402, and a CSI-RS resource through which a CSI-RS for channel estimation of the cell 320 is transmitted is a resource element indicated by reference number 403.

In this way, a set including resources allocated so that a CSI-RS used to estimate a channel state for each cell by a user terminal receiving data from a plurality of cells using the CoMP scheme is referred to as a measurement set. To That is, the measurement set includes resources allocated to a user terminal and allocated to transmit CSI-RS. Hereinafter, for convenience of description, a resource allocated to transmit a CSI-RS will be referred to as a'CSI-RS resource'. In addition, the measurement set includes at least one CSI-RS resource.

In FIG. 5, a case in which CSI-RS resources for three cells are allocated within one resource block has been described, and transmission timing information of a subframe in which CSI-RS is transmitted may be provided to a user terminal. That is, I _{CSI-RS, which} is a CSI-RS related parameter as described in Table 1, should be transmitted for each of the CSI-RS resources 401, 402, and 403 for the three cells. When the user terminal receives the I _CSI-RS , as the transmission timing information, for example, the period T _CSI-RS of the subframe in which the CSI-RS is transmitted as shown in Table 1, and the CSI-RS are transmitted. The offset Δ _CSI-RS of the subframe may be obtained. In addition, information on how many transmit antennas each CSI-RS resource included in the measurement set uses should be transmitted to the user terminal together. In addition, information related to transmission power used for each CSI-RS transmission must be transmitted together.

Meanwhile, all CSI-RS resources included in a measurement set allocated to a UE receiving a downlink data channel signal from each cell using the CoMP scheme are a cell to which the UE is connected, for example, the same cell as a serving cell. -If the CSI-RS resources allocated for channel state estimation for the RRH using the ID, a cell-specific reference signal (CRS) used in cells transmitting a downlink data channel signal using the CoMP scheme , Hereinafter referred to as'CRS') resources, synchronization signal resources, PBCH resources, and transmission timings of CRSs, transmission timings of synchronization signals and transmission timings of PBCH signals, and multimedia broadcasting multicast service single frequency network (Multimedia Broadcast Multicast Service single frequency network: MBSFN, hereinafter referred to as'MBSFN') CRS resource, synchronization signal resource, PBCH resource and CRS transmission timing, and synchronization signal transmission timing used in the serving cell with subframe configuration And the transmission timing of the PBCH signal and the MBSFN subframe configuration, the UE transmits the PDSCH signal through the CRS resource, the synchronization signal resource, and the resource excluding the PBCH resource in the same manner as in a general LTE-A mobile communication system. It is possible to receive. Here, the CRS resource represents a resource through which CRS is transmitted.

However, when at least one of the CSI-RS resources included in the measurement set is allocated from a cell having a Cell-ID different from the Cell-ID of the serving cell, the UE uses the same method as in a general LTE-A mobile communication system. Accordingly, it is impossible to detect the transmission timing of the CRS, synchronization signal, and PBCH signal transmitted from a cell having a Cell-ID different from the Cell-ID of the serving cell, and thus it is difficult to efficiently receive the PDSCH signal.

Accordingly, in the first to eleventh embodiments of the present invention, the PDSCH enables the UE to efficiently receive the PDSCH signal while considering the transmission timing of the CRS, the transmission timing of the synchronization signal, and the transmission timing of the PBCH signal. A method for transmitting/receiving signal transmission information is proposed, and a detailed description thereof is as follows.

First, prior to describing the first to eleventh embodiments of the present invention, a method of allocating CRS resources in a cellular wireless communication system according to an embodiment of the present invention will be described with reference to FIG. 6. .

6 is a diagram schematically illustrating a method of allocating CRS resources in a cellular wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, first, the vertical axis represents the subcarrier index, and the horizontal axis represents the OFDM symbol time.

In addition, the location of the CRS resource allocated by the cell using Cell-ID 1 is subcarrier 0 as the starting point, and unlike this, the location of the CRS resource allocated by the cell using Cell-ID 2 is subcarrier # Let 1 be the starting point. Therefore, the UE receives the PDSCH signal through a cell dynamically selected from a cell using Cell-ID 1 and a cell using Cell-ID 2, or uses a cell using Cell-ID 1 and Cell-ID 2. The PDSCH signal can be simultaneously received through all of the cells. Accordingly, available PDSCH resources vary according to which cell the UE receives the PDSCH signal.

In FIG. 6, a method of allocating CRS resources in a cellular wireless communication system according to an embodiment of the present invention has been described. Next, two cells in a cellular wireless communication system according to an embodiment of the present invention are described with reference to FIG. In the case of using different MBSFN subframe configurations, a subframe structure will be described.

7 is a diagram illustrating a subframe structure when two cells use different MBSFN subframe configurations in a cellular wireless communication system according to an embodiment of the present invention.

Prior to describing FIG. 7, it should be noted that the MBSFN subframe not including the CRS resource is shown as “MBSFN” and the general subframe including the CRS resource is shown as “normal”. In addition, in describing the embodiments of the present invention, it is assumed that the MBSFN subframe is mainly used for PDSCH signal transmission.

Referring to FIG. 7, since subframes #0, #4, #5, and #9 are set as general subframes in both cell 1 and cell 2, as described in FIG. 6, 2 There arises a problem of receiving the PDSCH signal in consideration of which CRS resource among CRS resources allocated by the cells. However, since subframes #2, #3, #7, and #8 do not include CRS resources in both cell 1 and cell 2, the PDSCH signal in consideration of a CRS resource among CRS resources allocated by two cells When receiving the PDSCH signal in consideration of only the demodulation reference signal (DM-RS: DeModulation Reference Signal, hereinafter referred to as'DM-RS') resources and CSI-RS resources does not occur, the UE receives the PDSCH signal do.

In addition, since subframe #1 is set as a general subframe in cell 1 and an MBSFN subframe in cell 2, cell 1 includes CRS resources and cell 2 does not include CRS resources.

That is, the UE detects the MBSFN configuration used by the cell allocating each of the CSI-RS resources included in the measurement set, so that different PDSCH resources are allocated for each subframe according to the detected MBSFN subframe configuration. have.

In FIG. 7, a subframe structure when different MBSFN subframe configurations are used in two cells in a cellular wireless communication system according to an embodiment of the present invention has been described. Next, an embodiment of the present invention with reference to FIG. In the cellular wireless communication system according to the example, a description will be given of a subframe structure when two cells use different subframe indexes.

FIG. 8 is a diagram illustrating a subframe structure when different subframe indexes are used in two cells in a cellular wireless communication system according to an embodiment of the present invention.

Before describing FIG. 8, a subframe including a synchronization signal resource is “Synch.”, a subframe including a PBCH signal resource is “PBCH”, and a subframe including both the synchronization signal resource and the PBCH signal resource It should be noted that the frame is shown as "Synch./PBCH".

FIG. 8 illustrates a case in which the synchronization signal of two cells, that is, a cell 1 and a cell 2, and a subframe in which a PBCH signal is transmitted are not the same. That is, referring to FIG. 8, based on the subframe index of cell 1, the synchronization signal of cell 1 and the PBCH signal are transmitted in subframe #0, and the synchronization signal of cell 1 is transmitted in subframe #5, and the subframe In #4, a synchronization signal and a PBCH signal of cell 2 are transmitted, and in sub-frame #9, a synchronization signal of cell 2 is transmitted. Accordingly, the UE must receive the PDSCH signal through a synchronization signal resource of cell 1 or cell 2 or a resource other than the PBCH resource according to the subframe index scheduled for PDSCH transmission.

Now, each of the first to eleventh embodiments of the present invention will be described below.

<First Example>

9 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular radio communication system according to the first embodiment of the present invention.

Prior to describing FIG. 9, in the first embodiment of the present invention, the base station transmits downlink scheduling information through a downlink physical control channel (PDCCH: Physical Downlink Control CHannel, hereinafter referred to as'PDCCH'), The downlink scheduling information includes cell information to be used for PDSCH signal transmission. In addition, the UE detects in which cell PDSCH signal transmission occurs by using the cell information, and then receives the PDSCH signal according to the PDSCH resource mapping method in the corresponding cell.

Referring to FIG. 9, first, in step 911, the UE receives measurement set information and MBSFN subframe configuration information from a base station, and then proceeds to step 913. Here, there may be various ways in which the base station transmits the MBSFN subframe configuration information to the UE, and this will be described in detail as follows.

The first method is a method of transmitting MBSFN subframe configuration information used in a cell to which the CSI-RS resource is allocated for each of the CSI-RS resources included in the measurement set to the UE together with the measurement set information.

As an example, when the CSI-RS resources included in the measurement set are CSI-RS-1 resources, CSI-RS-2 resources, and CSI-RS-3 resources, the measurement set information is {CSI-RS-1, CSI-RS-2 and CSI-RS-3}, and it is assumed that the MBSFN subframe configuration information for each CSI-RS resource is {MBSFN-1, MBSFN-2, MBSFN-3}. Here, MBSFN-1 includes MBSFN subframe configuration information used by the cell allocating CSI-RS-1 resources, and MBSFN-2 includes MBSFN subframe configuration information used by the cell allocating CSI-RS-2 resources. Including, MBSFN-3 includes MBSFN subframe configuration information used in the cell to which the CSI-RS-3 resource is allocated.

Here, the MBSFN subframe configuration information may be generated as a value corresponding to a subframe index used in a serving cell. Alternatively, the MBSFN subframe configuration information may be generated as a value corresponding to a subframe index used in a cell to which CSI-RS resources are allocated. If the MBSFN subframe configuration information is generated with a value corresponding to the subframe index used in the cell to which the CSI-RS resource is allocated, the subframe index used in the serving cell and the cell to which each CSI-RS resource is allocated The subframe index difference value, which is the difference value of the used subframe index, must also be transmitted to the UE. In this case, the UE may detect the MBSFN subframe index of the corresponding cell based on the difference between the received MBSFN subframe configuration information and the subframe index. For example, the UE may detect the MBSFN subframe index of the corresponding cell by adding a difference value of the subframe index to the received MBSFN subframe configuration information.

The second method is Cell IDs used in cells to which CSI-RS resources included in the measurement set are allocated, information on the measurement set, and Cell IDs used in cells to which CSI-RS resources included in the measurement set are allocated. Among these, MBSFN subframe configuration information of cells using Cell IDs different from Cell IDs used in the serving cell is transmitted to the UE.

As an example, the corresponding Cell ID along with measurement set information of a specific UE is (CSI-RS-1 (Cell-ID-1), CSI-RS-2 (Cell-ID-1), CSI-RS-3 (Cell- ID-2)}, and it is assumed that Cell-ID-1 is the Cell ID used in the serving cell. In this case, the base station includes measurement set information, Cell IDs used in cells to which CSI-RS resources included in the measurement set are allocated, and a Cell ID different from the Cell ID used in the serving cell, that is, Cell-ID. MBSFN subframe configuration information used in the cell using -2, that is, MBSFN-2 is directly transmitted to the UE. In this case, the UE detects the MBSFN subframe configuration information for the cell using Cell-ID-1 through the MBSFN subframe configuration information of the serving cell included in the system information for each cell.

The third method includes the measurement set information, information indicating whether each of the CSI-RS resources included in the measurement set is allocated in a serving cell, and among cells allocated with the CSI-RS resources included in the measurement set This is a method of transmitting MBSFN subframe configuration information used in a cell other than the serving cell to the UE.

As an example, measurement set information of a specific UE is allocated as {CSI-RS-1, CSI-RS-2, CSI-RS-3}, and with this, each CSI-RS resource included in the measurement set is a serving cell It is assumed that information indicating whether or not is allocated is transmitted in the form of [1, 0, 0] which is a bitmap form. Here, the value '1' means that the CSI-RS resource is a CSI-RS resource allocated from the serving cell, and the value '0' is that the CSI-RS resource is not a CSI-RS resource allocated from the serving cell, that is, This means that it is a CSI-RS resource allocated in a cell other than the serving cell. Then, the base station directly transmits {MBSFN-2, MBSFN-3}, which is the MBSFN subframe configuration information for the CSI-RS-2 resource and CSI-RS-3 resource allocated in a cell other than the serving cell, to the UE. . In this case, the UE detects the MBSFN subframe configuration information for the CSI-RS-1 resource through the MBSFN subframe configuration information of the serving cell included in the system information for each cell.

Meanwhile, in step 913, the UE receives PDSCH scheduling information from the base station through the PDCCH, detects information on a cell transmitting the PDSCH signal using the received PDSCH scheduling information, and proceeds to step 915. As an example, when the measurement set information of a specific UE is {CSI-RS-1, CSI-RS-2}, a bitmap including 2 bits is transmitted to the corresponding UE, and if the bitmap is [1, 0], CSI The PDSCH signal is transmitted in the cell to which the -RS-1 resource is allocated. In contrast, if the bitmap is [0, 1], the PDSCH signal is transmitted from the cell to which the CSI-RS-2 resource is allocated, and if the bitmap is [1, 1], the cell to which the CSI-RS-1 resource is allocated. And the PDSCH signal is transmitted in all the cells to which the CSI-RS-2 resource is allocated.

Meanwhile, in step 915, the UE detects MBSFN subframe configuration information of cells in which the PDSCH signal is transmitted in a scheduled subframe, and proceeds to step 917. In step 917, the UE detects the positions of CRS resources of cells in which the scheduled subframe is set as a general subframe among cells in which the PDSCH signal is transmitted in the scheduled subframe, and proceeds to step 919. Here, the operation of the UE detecting the location of the CRS resource of the corresponding cells will be described as follows.

First, when PDSCH signal transmission occurs in only one cell, if the CRS resource of the corresponding cell is set to an MBSFN subframe, the UE receives the PDSCH signal without considering CRS resources, and unlike this, the CRS allocated by the corresponding cell If the resource is set as a general subframe, the UE detects that the PDSCH signal is not transmitted at the location of the CRS resource allocated by the corresponding cell.

In contrast, when the PDSCH signal is simultaneously transmitted in a plurality of cells, the UE detects that the PDSCH signal is not transmitted through CRS resources set as a general subframe among CRS resources allocated by the corresponding cells. Here, the location of the CRS resource allocated by a cell other than the serving cell may be notified while the base station notifies the measurement set information to the UE. This will be described in detail as follows.

First, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in a form of directly notifying the UE of the Cell-ID used by the cell to which each CSI-RS resource is allocated.

Second, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in the form of notifying the UE of the start location of the CRS resource.

Third, the base station may notify the number of CRS ports together with the measurement set information to notify the location of the CRS resource allocated by a cell other than the serving cell. In this case, the UE may determine the location of the CRS resource assuming that cells other than the serving cell always use 4 CRS ports.

Meanwhile, in step 919, the UE checks whether there are cells in which a synchronization signal or a PBCH signal is transmitted in a corresponding subframe among cells in which a PDSCH signal is transmitted in a scheduled subframe.

As a result of the check, if there are cells in which a synchronization signal or a PBCH signal is transmitted in a corresponding subframe among cells in which a PDSCH signal is transmitted in the scheduled subframe, the UE proceeds to step 921. In step 921, the UE detects downlink data by receiving a PDSCH signal only through resources excluding a CRS resource, a synchronization signal resource or a PBCH resource and a CSI-RS resource, and a DM-RS resource.

Meanwhile, if there is no cell in which a synchronization signal or a PBCH signal is transmitted in a corresponding subframe among cells in which a PDSCH signal is transmitted in a subframe scheduled as a result of the check in step 919, the UE proceeds to step 923. In step 923, the UE detects downlink data by receiving a PDSCH signal only through resources excluding CRS resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in FIG. 9, a process of receiving a PDSCH signal by the UE has been described on the assumption that the UE can check the transmission timing of the synchronization signal and the PBCH signal even for cells other than the serving cell.

However, unlike FIG. 9, there may be a case in which the UE cannot detect the transmission timing of the synchronization signal and the PBCH signal transmitted in cells other than the serving cell. In this case, step 919 may be modified as a step of checking whether synchronization signal or PBCH signal transmission occurs in a corresponding subframe of the serving cell. That is, when the UE cannot detect the transmission timing of the synchronization signal and the PBCH signal for cells other than the serving cell, the UE receives the PDSCH signal considering only the transmission timing of the synchronization signal and the PBCH signal of the serving cell.

<Second Example>

10 is a flowchart illustrating a process of receiving a PDSCH signal by a UE in a cellular wireless communication system according to a second embodiment of the present invention.

Before describing FIG. 10, in the second embodiment of the present invention, the base station transmits downlink scheduling information through a PDCCH, and the downlink scheduling information includes cell information to be used for PDSCH signal transmission. Then, the UE detects in which cell PDSCH signal transmission occurs by using the cell information, and then receives the PDSCH signal according to the PDSCH resource mapping method in the corresponding cell.

Referring to FIG. 10, the UE receives measurement set information and MBSFN subframe configuration information of cells allocated CSI-RS resources included in the measurement set from the base station in step 1011, and proceeds to step 1013. The UE receives PDSCH scheduling information from the base station through the PDCCH in step 1013, detects information on a cell transmitting the PDSCH signal using the PDSCH scheduling information, and proceeds to step 1015. As an example, information on a cell transmitting a PDSCH signal may be implemented in 1 bit, and the UE interprets information on a cell transmitting the PDSCH signal as shown in Table 2 below.

Information on PDSCH transmission cell Translate 0 PDSCH signal is transmitted from the serving cell One PDSCH signal is transmitted in all cells allocated CSI-RS resources included in the measurement set

*As shown in Table 2 above, the UE that detects that the PDSCH signal is transmitted from the serving cell is a CRS resource, a PBCH signal resource, a synchronization signal resource, a CSI-RS resource and a corresponding subframe of the serving cell. Downlink data is detected by receiving the PDSCH signal only in the remaining resources except the DM-RS resource.

Contrary to this, when it is detected that the PDSCH signal is transmitted in all cells allocating CSI-RS resources included in the measurement set, the UE includes the measurement set in which the corresponding subframe is not set as an MBSFN subframe. For all cells allocated CSI-RS resources, downlink by receiving a PDSCH signal only through the remaining resources excluding the CRS resource, PBCH resource, synchronization signal resource, CSI-RS resource and DM-RS resource that may be included in the corresponding subframe Detect data.

On the other hand, contrary to the above description, information on a cell transmitting a PDSCH signal may be implemented in 2 bits. When information on a cell transmitting the PDSCH signal is implemented in 2 bits, the UE As shown in Table 3>, information on a cell transmitting the PDSCH signal is analyzed.

Information on PDSCH transmission cell Translate 00 PDSCH signal is transmitted from the serving cell 01 PDSCH signal is transmitted in the first cell configured through RRC message 10 PDSCH signal is transmitted from the second cell configured through the RRC message 11 PDSCH signal is transmitted in all cells allocated CSI-RS resources included in the measurement set

As shown in Table 3, the UE detects that the PDSCH signal is transmitted from the serving cell (in the case of '00'), or the UE controls radio resources (radio resource control: RRC, hereinafter'RRC'). When it detects that the PDSCH signal is transmitted from the first cell through a message (in case of '01'), or when the UE detects that the PDSCH signal is transmitted from the second cell through an RRC message ( In the case of '10'), the UE PDSCH only through the remaining resources excluding CRS resources, PBCH resources, synchronization signal resources, CSI-RS resources, and DM-RS resources included in the corresponding subframe of the corresponding cell. Receives a signal to detect downlink data. On the contrary, when the UE detects that the PDSCH signal is transmitted in all cells allocated CSI-RS resources included in the measurement set (in case of '11'), the UE indicates that the corresponding subframe is an MBSFN subframe. Remaining resources excluding CRS resources, PBCH resources, synchronization signal resources, CSI-RS resources, and DM-RS resources that may be included in the corresponding subframe for all cells that have not been set and allocated CSI-RS resources included in the measurement set The PDSCH signal is received only through the channels to detect downlink data.

The RRC message described in Table 3 includes at least one of the following information.

1.Cell-ID

2. MBSFN subframe configuration information

3. Number of CRS ports

4. CRS resource location information

5. Serving cell and subframe index difference value of the cell

6. Number of OFDM symbols used for the control channel

That is, in step 1013, the UE, having detected information on a cell in which the PDSCH signal is transmitted, detects MBSFN subframe configuration for cells in which PDSCH signal transmission occurs in step 1015, and proceeds to step 1017. In step 1017, the UE detects the positions of CRS resources for cells in which a corresponding subframe is set as a general subframe among cells in which PDSCH transmission occurs in a scheduled subframe, and proceeds to step 1019. In step 1019, the UE detects cells in which a synchronization signal and a PBCH signal are generated in a corresponding subframe among cells in which PDSCH transmission occurs, and proceeds to step 1021. In step 1021, the UE detects downlink data by receiving a PDSCH signal only through resources excluding CRS resources, synchronization signal resources, PBCH resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in FIG. 10, a process of receiving a PDSCH signal by the UE has been described under the assumption that the UE can check the transmission timing of the synchronization signal and the PBCH signal even for cells other than the serving cell.

However, unlike in FIG. 10, there may be a case in which the UE cannot check the transmission timing of the synchronization signal and the PBCH signal transmitted from cells other than the serving cell. In this case, the UE transmits the synchronization signal and the PBCH signal of the serving cell. The PDSCH signal is received by considering only the timing.

<Third Example>

11 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a third embodiment of the present invention.

Prior to describing FIG. 11, in the third embodiment of the present invention, the UE checks MBSFN subframe configuration information for cells to which CSI-RS resources included in the measurement set are allocated, and then all possible CRS resources and synchronization The PDSCH signal is received only through the remaining resources except for the signal resource and the PBCH resource.

Referring to FIG. 11, in step 1111, the UE receives measurement set information from a base station and MBSFN subframe configuration information of cells allocated CSI-RS resources included in the measurement set, and proceeds to step 1113. Here, since the base station transmits the MBSFN subframe configuration information of each cell to the UE is the same as described in the first embodiment of the present invention, a detailed description thereof will be omitted here. In step 1113, the UE proceeds to step 1115 after receiving PDSCH scheduling information from the base station through PDCCH. In step 1115, the UE detects MBSFN sub-frame configuration information of cells allocated CSI-RS resources included in the measurement set in the scheduled sub-frame, and proceeds to step 1117.

In step 1117, the UE detects the positions of CRS resources for cells in which a scheduled subframe is set as a general subframe among cells allocated CSI-RS resources included in the measurement set, and proceeds to step 1119. That is, the UE detects that a PDSCH signal is not transmitted at locations of all CRS resources allocated by cells in which a scheduled subframe is set as a normal subframe among cells allocated CSI-RS resources included in the measurement set.

Here, the location of the CRS resource allocated by a cell other than the serving cell may be notified while the base station notifies the measurement set information to the UE. This will be described in detail as follows.

First, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in a form of directly notifying the UE of the Cell-ID used by the cell to which each CSI-RS resource is allocated.

Second, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in the form of notifying the UE of the start location of the CRS resource.

Third, the base station may notify the number of CRS ports together with the measurement set information to notify the location of the CRS resource allocated by a cell other than the serving cell. In this case, the UE may determine the location of the CRS resource assuming that cells other than the serving cell always use 4 CRS ports.

Meanwhile, in step 1119, the UE checks whether there are cells in which a synchronization signal or a PBCH signal is transmitted in a scheduled subframe among cells allocating CSI-RS resources included in the measurement set.

As a result of the check, if there are cells in which a synchronization signal or a PBCH signal is transmitted in a scheduled subframe among cells allocating CSI-RS resources included in the measurement set, the UE proceeds to step 1121. In step 1121, the UE detects downlink data by receiving a PDSCH signal only through resources excluding CRS resources, synchronization signal resources, PBCH resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in step 1119, if there are no cells in which a synchronization signal and a PBCH signal are transmitted in a scheduled subframe among cells allocating CSI-RS resources included in the measurement set, the UE proceeds to step 1123. In step 1123, the UE detects downlink data by receiving a PDSCH signal only through resources excluding the CRS resource, CSI-RS resource, and DM-RS resource.

Meanwhile, in FIG. 11, a process of receiving a PDSCH signal by the UE has been described under the assumption that the UE can check the transmission timing of the synchronization signal and the PBCH signal even for cells other than the serving cell.

However, unlike in FIG. 11, there may be a case where it is not possible to check the transmission timing of the synchronization signal and the PBCH signal transmitted from cells other than the serving cell. In this case, step 1119 may be modified to a step of checking whether transmission of a synchronization signal or a PBCH signal occurs in a corresponding subframe of the serving cell. That is, when the UE cannot detect the transmission timing of the synchronization signal and the PBCH signal for cells other than the serving cell, the UE receives the PDSCH signal considering only the transmission timing of the synchronization signal and the PBCH signal of the serving cell.

<Fourth Example>

12 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a fourth embodiment of the present invention.

Before describing FIG. 12, in the fourth embodiment of the present invention, the UE detects MBSFN subframe configuration information for cells allocated CSI-RS resources included in the measurement set, and then transmits all possible CRS resources to a PDSCH signal. Exclude from the resource to be received. Meanwhile, the synchronization signal resource and the PBCH resource are excluded from the resource to receive the PDSCH signal only when all cells allocated with the CSI-RS resources included in the measurement set simultaneously transmit the synchronization signal and the PBCH signal. If even one of the cells allocated CSI-RS resources included in the measurement set does not transmit the synchronization signal and the PBCH signal, the corresponding resource, that is, the synchronization signal resource and the PBCH resource, are not excluded from the resource to receive the PDSCH signal. Without, the UE receives the PDSCH signal through the synchronization signal resource and the PBCH resource.

Referring to FIG. 12, in step 1211, the UE detects measurement set information from the base station and MBSFN subframe configuration information of cells allocated CSI-RS resources included in the measurement set, and proceeds to step 1213. Since the base station transmits the MBSFN subframe configuration information of each cell to the UE is the same as described in the first embodiment of the present invention, a detailed description thereof will be omitted here.

In step 1213, the UE receives PDSCH scheduling information through the PDCCH and proceeds to step 1215. In step 1215, the UE detects MBSFN subframe configuration information of cells allocating CSI-RS resources included in the measurement set in the scheduled subframe, and proceeds to step 1217. In step 1217, the UE detects positions of CRS resources for cells in which a scheduled subframe is set as a general subframe among cells allocating CSI-RS resources included in the measurement set, and proceeds to step 1219. That is, the UE detects that a PDSCH signal is not transmitted at locations of all CRS resources allocated by cells in which a scheduled subframe is set as a general subframe among cells allocating CSI-RS resources included in the measurement set. Here, the location of the CRS resource allocated by a cell other than the serving cell may be notified together while the base station notifies the UE of measurement set information. This will be described in detail as follows.

First, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in a form of directly notifying the UE of the Cell-ID used by the cell to which each CSI-RS resource is allocated.

Second, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in the form of notifying the UE of the start location of the CRS resource.

Third, the base station may notify the number of CRS ports together with the measurement set information to notify the location of the CRS resource allocated by a cell other than the serving cell. In this case, the UE may determine the location of the CRS resource assuming that cells other than the serving cell always use 4 CRS ports.

Meanwhile, in step 1219, the UE checks whether all cells allocated CSI-RS resources included in the measurement set simultaneously transmit a synchronization signal or a PBCH signal in a scheduled subframe.

As a result of the check, when all cells allocated CSI-RS resources included in the measurement set transmit a synchronization signal or a PBCH signal in a scheduled subframe, the UE proceeds to step 1221. In step 1221, the UE detects downlink data by receiving the PDSCH signal only through resources excluding CRS resources, synchronization signal resources, PBCH resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in step 1219, when all cells allocated CSI-RS resources included in the measurement set do not transmit a synchronization signal or a PBCH signal in a scheduled subframe, that is, CSI-RS resources included in the measurement set are If at least one of all the allocated cells does not transmit a synchronization signal or a PBCH signal in a scheduled subframe, the UE proceeds to step 1223. In step 1223, the UE detects downlink data by receiving a PDSCH signal through resources excluding CRS resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in FIG. 12, a process of receiving a PDSCH signal by the UE is described under the assumption that the UE can check the transmission timing of the synchronization signal and the PBCH signal even for cells other than the serving cell.

However, unlike FIG. 12, it may not be possible to check the transmission timing of the synchronization signal and the PBCH signal transmitted from cells other than the serving cell. In this case, step 1219 is performed in the corresponding subframe of the serving cell. It can also be modified by checking whether signal transmission occurs. That is, when the UE fails to check the transmission timing of the synchronization signal and the PBCH signal for cells other than the serving cell, the PDSCH signal is received in consideration of only the transmission timing of the synchronization signal and the PBCH signal of the serving cell.

<Fifth Example>

13 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a fifth embodiment of the present invention.

Prior to describing FIG. 13, in the fifth embodiment of the present invention, after the UE detects MBSFN subframe configuration information for cells allocated CSI-RS resources included in the measurement set, the corresponding subframe is at least one If the cell is configured as an MBSFN subframe, the PDSCH signal is received without considering CRS resources.

On the other hand, the synchronization signal resource and the PBCH resource are also excluded from the PDSCH resource only when all cells allocated CSI-RS resources included in the measurement set simultaneously transmit the synchronization signal and the PBCH signal, and the CSI-RS included in the measurement set If even one cell among all cells allocated resources does not transmit a synchronization signal and a PBCH signal, the PDSCH signal is received without considering the corresponding resource. Accordingly, when receiving the PDSCH signal according to the fifth embodiment of the present invention, the UE receives the PDSCH signal from a cell allocating as many resources as possible.

Referring to FIG. 13, first, in step 1311, the UE receives measurement set information and MBSFN subframe configuration information of cells allocated CSI-RS resources included in the measurement set from the base station, and proceeds to step 1313. Since the base station transmits the MBSFN subframe configuration information of each cell to the UE is the same as described in the first embodiment of the present invention, a detailed description thereof will be omitted here. In step 1313, the UE receives PDSCH scheduling information from the base station through PDCCH and proceeds to step 1315. In step 1315, the UE detects MBSFN sub-frame configuration information of cells allocated CSI-RS resources included in the measurement set in the scheduled sub-frame, and proceeds to step 1317.

In step 1317, the UE checks whether a corresponding subframe is set to a general subframe rather than an MBSFN subframe in all cells to which CSI-RS resources included in the measurement set are allocated. As a result of the check, if the corresponding subframe is not configured as a general subframe other than the MBSFN subframe in all cells allocated CSI-RS resources included in the measurement set, the UE proceeds to step 1319. In step 1319, the UE detects downlink data by receiving a PDSCH signal through resources other than a CSI-RS resource and a DM-RS resource.

On the other hand, as a result of the check in step 1317, if the corresponding subframe is set to a normal subframe rather than an MBSFN subframe in all cells allocated CSI-RS resources included in the measurement set, the UE proceeds to step 1321. In step 1321, the UE checks the locations of CRS resources for all cells to which CSI-RSs included in the measurement set are allocated, and proceeds to step 1323. That is, the UE detects that a PDSCH signal is not transmitted through CRS resources for all cells allocated CSI-RS resources included in the measurement set. Here, the location of the CRS resource allocated by a cell other than the serving cell may be notified while the base station notifies the measurement set information to the UE. This will be described in detail as follows.

First, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in a form of directly notifying the UE of the Cell-ID used by the cell to which each CSI-RS resource is allocated.

Second, the base station may notify the location of the CRS resource allocated by a cell other than the serving cell in the form of notifying the UE of the start location of the CRS resource.

Third, the base station may notify the number of CRS ports together with the measurement set information to notify the location of the CRS resource allocated by a cell other than the serving cell. In this case, the UE may determine the location of the CRS resource assuming that cells other than the serving cell always use 4 CRS ports.

Meanwhile, in step 1323, the UE checks whether all cells allocated CSI-RS resources included in the measurement set simultaneously transmit a synchronization signal or a PBCH signal in a scheduled subframe.

As a result of the check, when all cells allocated CSI-RS resources included in the measurement set transmit a synchronization signal or a PBCH signal in a scheduled subframe, the UE proceeds to step 1325. In step 1325, the UE detects downlink data by receiving a PDSCH signal only through resources excluding CRS resources, synchronization signal resources, PBCH resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in step 1323, when all cells allocated CSI-RS resources included in the measurement set do not transmit synchronization signals or PBCH signals in a scheduled subframe, that is, CSI-RS resources included in the measurement set If at least one of the cells to which they are allocated does not transmit a synchronization signal or a PBCH signal in a scheduled subframe, the UE proceeds to step 1327. In step 1327, the UE detects downlink data by receiving a PDSCH signal through resources excluding CRS resources, CSI-RS resources, and DM-RS resources.

Meanwhile, in FIG. 13, a process of receiving a PDSCH signal by the UE has been described under the assumption that the UE can check the transmission timing of the synchronization signal and the PBCH signal even for cells other than the serving cell.

However, unlike in FIG. 13, a case in which transmission timing of a synchronization signal and a PBCH signal transmitted from cells other than a serving cell may not be confirmed may occur. In this case, step 1323 may be modified as a step of checking whether synchronization signal or PBCH signal transmission occurs in a corresponding subframe of the serving cell. That is, when the UE fails to check the transmission timing of the synchronization signal and the PBCH signal for cells other than the serving cell, the PDSCH signal is received in consideration of only the transmission timing of the synchronization signal and the PBCH signal of the serving cell.

<Sixth Example>

14 is a flowchart illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a sixth embodiment of the present invention.

Prior to describing FIG. 14, in the first to fifth embodiments of the present invention, a PDSCH signal in consideration of a DS scheme in which cells receiving a PDSCH signal by a UE are dynamically changed, a DS/DB scheme, and a JT scheme The case of receiving is described. However, in the sixth embodiment of the present invention, a case in which the UE receives the PDSCH signal by considering the DS scheme, the DS/DB scheme, and the JT scheme as well as the CS/CB scheme for receiving the PDSCH signal only in the serving cell will be described. To

Therefore, in the sixth embodiment of the present invention, the base station receives the PDSCH signal from the CRS resource allocated by cells other than the serving cell among the cells to which CSI-RS resources included in the measurement set are allocated, and the synchronization signal resource or PBCH resource. A PDSCH overhead (PDSCH_OVERHEAD, hereinafter referred to as'PDSCH_OVERHEAD') parameter indicating whether to be included in the resource is transmitted to the UE through an RRC message. Here, of course, the RRC message including the PDSCH_OVERHEAD parameter may be implemented as a separate new RRC message, or may be implemented using an existing RRC message. A detailed description of the RRC message itself including the PDSCH_OVERHEAD parameter will be omitted. The UE determines a resource for receiving a PDSCH signal according to the value of the PDSCH_OVERHEAD parameter.

Here, the PDSCH_OVERHEAD parameter may be implemented with 1 bit as an example. For example, when the value of the PDSCH_OVERHEAD parameter is '1', that is, ON, the resource for receiving the PDSCH signal includes a CRS resource allocated by cells other than the serving cell and a synchronization signal resource or a PBCH resource. Show. On the contrary, when the value of PDSCH_OVERHEAD is '0', that is, OFF, it indicates that only the CRS resource allocated by the serving cell and the synchronization signal resource or the PBCH resource include the resource to receive the PDSCH signal. That is, when the value of the PDSCH_OVERHEAD parameter is '1', it indicates that the UE receives the PDSCH signal using any one of the PDSCH signal reception methods described in the first to fifth embodiments of the present invention. On the contrary, when the value of the PDSCH_OVERHEAD parameter is '0', it indicates that the UE receives the PDSCH signal by considering only the serving cell, unlike the first to fifth embodiments of the present invention.

Referring to FIG. 14, in step 1411, the UE proceeds to step 1413 after receiving measurement set information from the base station. In step 1413, the UE receives the PDSCH_OVERHEAD parameter from the base station and proceeds to step 1415. In step 1415, the UE checks whether the value of the PDSCH_OVERHEAD parameter is set to 1 (PDSCH_OVERHEAD parameter value == 1). As a result of the check, if the value of the PDSCH_OVERHEAD parameter is set to 1, the UE proceeds to step 1417. In step 1417, the UE includes MBSFN subframe configuration information and CRS resources for cells to which CSI-RS resources included in the measurement set are allocated as described in any one of the first to fifth embodiments of the present invention. The downlink data is detected by receiving the PDSCH signal using the location of and the transmission timing of the synchronization signal and the PBCH signal.

Meanwhile, if the value of the PDSCH_OVERHEAD parameter is not set to 1 as a result of the check in step 1415, that is, if the value of the PDSCH_OVERHEAD parameter is set to 0, the UE proceeds to step 1419. In step 1419, the UE checks the MBSFN subframe configuration information of the serving cell, the location of the CRS resource, and the transmission timing of the synchronization signal and the PBCH signal, and the corresponding CRS resource, the synchronization signal resource and the PBCH resource, and the CSI- Downlink data is detected by receiving a PDSCH signal through an RS resource and a resource other than a DM-RS resource.

<Seventh Example>

15 is a flowchart illustrating a process in which a UE receives a PDSCH signal in a wireless communication system according to a seventh embodiment of the present invention.

Prior to describing FIG. 15, in the first to sixth embodiments of the present invention, system information or paging information reception of a UE using an existing LTE scheme is not separately considered. In the seventh embodiment of, a case in which the UE receives the PDSCH signal will be described in consideration of receiving system information or paging information for UEs using the existing LTE scheme.

Therefore, in the seventh embodiment of the present invention, when the base station transmits system information or paging information, only the method of transmitting the PDSCH signal of the serving cell is used as defined in the existing LTE scheme.

In contrast, when the base station transmits data other than system information or paging information, CRS resources allocated by cells other than the serving cell as well as the serving cell as in the first to sixth embodiments of the present invention, and The resource to transmit the PDSCH signal is determined by considering the synchronization signal resource and the PBCH resource. In order to schedule PDSCH signal transmission including system information, the base station uses a system information radio network temporary identifier (SI-RNTI) used in an LTE mobile communication system in the corresponding scheduling information to schedule transmission of a PDSCH signal including system information. A cyclic redundancy check (CRC, hereinafter referred to as'CRC') generated by using'RNTI') is added to generate the corresponding PDCCH, and PDSCH signal transmission including paging information is performed. For scheduling, a CRC generated using a paging-radio network temporary identifier (P-RNTI, hereinafter referred to as'P-RNTI') used in the LTE mobile communication system is used.

Referring to FIG. 15, in step 1511, the UE receives PDSCH scheduling information from a base station through a PDCCH and proceeds to step 1513. In step 1513, the UE checks whether the base station uses a CRC corresponding to SI-RNTI or P-RNTI for the PDCCH transmission. As a result of the check, if the base station does not use the CRC corresponding to the SI-RNTI or P-RNTI, the UE proceeds to step 1515. In step 1515, the UE includes MBSFN subframe configuration information and CRS resources for cells to which CSI-RS resources included in the measurement set are allocated as described in any one of the first to sixth embodiments of the present invention. The downlink data is detected by receiving the PDSCH signal using the position of, the transmission timing of the synchronization signal and the transmission timing of the PBCH signal.

Meanwhile, if the base station uses the CRC corresponding to the SI-RNTI or P-RNTI as a result of the check in step 1513, the UE proceeds to step 1517. In step 1517, the UE checks the MBSFN subframe configuration information of the serving cell, the location of the CRS resource, the transmission timing of the synchronization signal and the transmission timing of the PBCH signal, and the corresponding CRS resource, the synchronization signal resource and the PBCH resource, and , CSI-RS resources, and by receiving the PDSCH signal through resources excluding the DM-RS resources to detect downlink data.

<Eighth Example>

In the eighth embodiment of the present invention, the UE interprets the format of specific downlink control information (Downlink Control Information: DCI, hereinafter referred to as'DCI') included in dynamic scheduling information transmitted through the PDCCH. Accordingly, the current PDSCH resource mapping method is detected, and downlink data is detected by receiving a PDSCH signal corresponding to the detected PDSCH resource mapping method. In this case, the specific DCI format may inform at least one of the following CoMP scheme related scheduling information as well as the PDSCH resource mapping scheme.

-DM-RS sequence information for PDSCH signal reception

-OFDM symbol position at which PDSCH signal reception should start (or the number of OFDM symbols used for transmission of a control channel (eg, PDCCH) signal)

-Relationship between the cell through which the PDSCH signal is transmitted and the CSI-RS

Since the three pieces of information and the PDSCH resource mapping scheme described above are information that can be changed corresponding to a cell in which the PDSCH signal is transmitted, it is possible to be simultaneously transmitted through the same DCI format.

값에 의해 동적으로 결정되고, 이

값이 일 예로 '0' 또는 '1'로 설정됨에 따라 해당 PDSCH 신호 수신을 위하여 RRC 메시지를 사용하여 설정된 두 가지 수열들 중 하나가 DM-RS 수열로 적용된다. 또한, 이

값은 일 예로 3비트로 구현된 DCI 포맷을 통해 결정되며, 3비트로 표현 가능한 8가지의 상태가 아래 <표 4>와 같이 정의된다. 즉, 상기 UE는 두 가지 DM-RS 수열들을 사용하는 것이 가능하며, 특정 PDSCH 신호 전송이 발생하는 상황에서 하나의 부호어(codeword)가 전송되고, 해당 DCI 포맷이 1 번 상태 및 3 번 상태에서는 두 개의 부호어가 전송되고, 해당 DCI 포맷이 1번 상태인 경우에는

값이 1로 설정되어 이에 해당하는 DM-RS 수열을 사용하고, 그 외의 DCI 포맷 상태에서는 모두

값 0에 해당하는 DM-RS 수열을 사용한다. In the LTE mobile communication system, the DM-RS sequence information is

Dynamically determined by the value, this

As the value is set to '0' or '1', for example, one of two sequences set using an RRC message for receiving a corresponding PDSCH signal is applied as a DM-RS sequence. Also, this

As an example, the value is determined through the DCI format implemented in 3 bits, and eight states that can be expressed in 3 bits are defined as shown in <Table 4> below. That is, the UE can use two DM-RS sequences, and when a specific PDSCH signal transmission occurs, one codeword is transmitted, and the corresponding DCI format is in state 1 and state 3, When two codewords are transmitted and the corresponding DCI format is in the state of 1,

The value is set to 1 and the corresponding DM-RS sequence is used, and in all other DCI format states,

The DM-RS sequence corresponding to the value 0 is used.

One Codeword:
Codeword 0 enabled,
Codeword 1 disabled Two Codewords:
Codeword 0 enabled,
Codeword 1 enabled Value Message Value Message 0 1 layer, port 7, n _SCID = 0 0 2 layer, ports 7-8, n _SCID = 0 One 1 layer, port 7, n _SCID =1 One 2 layer, ports 7-8, n _SCID =1 2 1 layer, port 8, n _SCID = 0 2 3 layer, ports 7-9 3 1 layer, port 8, n _SCID =1 3 4 layer, ports 7-10 4 2 layer, ports 7-8 4 5 layer, ports 7-11 5 2 layer, ports 7-9 5 6 layer, ports 7-12 6 2 layer, ports 7-10 6 7 layer, ports 7-13 7 Reserved 7 8 layer, ports 7-14

값에 대한 기지국 및 UE의 DM-RS 수열 설정 방법을 나타낸다.<Table 5> below is

Represents a method of setting a DM-RS sequence of a base station and a UE for a value.

n _SCID DM-RS sequence setting 0 The first DM-RS sequence set through an RRC message One Second DM-RS sequence set through RRC message

In addition, considering the DS scheme and the JT scheme in which cells receiving the PDSCH signal dynamically change, the UE can check CRS resource locations for each cell through the following parameters to check possible PDSCH resources. v _shift (=PCID mod 6) or physical Cell-ID (physical Cell-ID: PCID, hereinafter referred to as'PCID')

2. MBSFN subframe configuration information

3. Number of CRS antenna ports

값에 따라 DM-RS 수열 설정 정보와 PDSCH 자원의 위치를 동적으로 확인할 수 있도록 하는 방법이다. 즉, 상기

값이 0으로 검출될 경우, 상기 UE는 RRC 메시지를 통해 설정된 첫 번째 DM-RS 수열을 설정하고, RRC 메시지를 통해 설정된 첫 번째 CRS 자원의 위치 정보를 검출하여 해당 CRS 자원 위치 이외의 자원들에서만 PDSCH 신호가 전송될 수 있다는 것을 검출한다. Accordingly, one method for simultaneously transmitting the DM-RS sequence configuration information for receiving the PDSCH signal and the location information of the PDSCH resource that can be allocated according to the CRS resource location for each cell to the UE is as shown in Table 6 below.

This is a method to dynamically check the location of the DM-RS sequence configuration information and the PDSCH resource according to the value. That is, the above

When the value is detected as 0, the UE sets the first DM-RS sequence set through the RRC message, detects the location information of the first CRS resource set through the RRC message, and detects only resources other than the corresponding CRS resource location. It detects that the PDSCH signal can be transmitted.

값이 1로 검출될 경우, RRC 메시지를 통해 설정된 두 번째 DM-RS 수열 설정 정보와 CRS 자원 위치 정보를 검출한다.In contrast, the above

When the value is detected as 1, the second DM-RS sequence setting information and CRS resource location information set through the RRC message are detected.

값

value DM-RS sequence setting CRS resource location setting 0 1 ^st DM-RS sequence configured by RRC 1 ^st set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC One 2 ^nd DM-RS sequence configured by RRC 2 ^nd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC

값 외의 추가 비트의 사용을 고려할 수 있다. 즉, DM-RS 수열 설정은

값만을 사용하여 통보되고, 추가적인 1비트 정보를 통하여 상기 UE가 4 종류의 CRS 자원 위치 설정 정보들 중 하나를 검출할 수 있게 된다. 즉, 하기 <표 7>에 나타낸 바와 같은 DM-RS 수열 설정 정보 및 CRS 자원 위치 설정 정보를 사용하면 상기 <표 6>에 비하여 3개 이상의 계층(layer)들을 사용하여 PDSCH 신호를 전송하는 경우에도 기지국이 UE로 PDSCH 자원 변화를 알려줄 수 있다.If the cellular radio communication system enables the UE to receive a PDSCH signal in two or more cells, the base station must be able to inform the UE of additional CRS resource location setting information other than the two CRS resource location setting information. And, for this purpose, as shown in Table 7

The use of additional bits other than the value can be considered. That is, the DM-RS sequence setting is

It is notified using only the value, and the UE can detect one of the four types of CRS resource location setting information through additional 1-bit information. That is, if the DM-RS sequence setting information and CRS resource location setting information as shown in the following <Table 7> are used, even when the PDSCH signal is transmitted using three or more layers compared to the <Table 6> The base station may inform the UE of the PDSCH resource change.

n _SCID Extra bit DM-RS sequence setting CRS resource location setting 0 0 1 ^st DM-RS sequence configured by RRC 1 ^st set of [ v _shift (or PCID), MBSFN configuration, and # of CRS 0 One 1 ^st DM-RS sequence configured by RRC 2 ^nd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC One 0 2 ^nd DM-RS sequence configured by RRC 3 ^rd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC One One 2 ^nd DM-RS sequence configured by RRC 4 ^th set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC

Meanwhile, useful PDSCH resources are affected by the number of OFDM symbols used for PDCCH signal transmission in addition to the CRS resource location. In the LTE mobile communication system, OFDM symbols from the first to the third can be used in one subframe for PDCCH transmission, and the number of used OFDM symbols is a Physical Control Format Indication Channel (PCFICH, hereinafter). It may be notified to the UE through'PCFICH'). However, the number of OFDM symbols used for PDCCH transmission may be different for each cell, and the UE can check the PCFICH of the cell to which the UE is connected, that is, the serving cell, but it is difficult to check the PCFICH of adjacent cells other than the serving cell. . Accordingly, the UE using the DS scheme or the JT scheme needs to adjust the start position of the OFDM symbol to be used for PDSCH signal transmission according to the cell receiving the PDSCH signal. In this case, the RRC message used to notify the UE of the start position of the OFDM symbol includes one of the following four pieces of information, and the UE transmits the PDSCH signal with one of the following four pieces of information. You can set the location of the OFDM symbol where it starts:

1. Information 1: The location of the OFDM symbol at which PDSCH signal transmission starts, used in the cell to which the UE is connected.

2. Information 2: Second OFDM symbol

3. Information 3: Third OFDM symbol

4. Information 4: Fourth OFDM symbol

Here, when the RRC message includes the information 1, the UE detects a PCFICH or a PDSCH configured using another RRC message for a carrier aggregation (carrier aggregation: CA, hereinafter referred to as'CA') method. The PDSCH signal may be received according to the signal transmission start position information.

In contrast, when the RRC message includes any one of the information 2 to 4, the UE ignores the configuration transmitted using another RRC message for the PCFICH or CA method, and the DS method or the JT method For this purpose, a PDSCH signal may be received corresponding to an RRC message for setting a PDSCH signal transmission start position to the UE.

값에 따른 DM-RS 수열 설정 정보 및 PDSCH 신호 송신을 위해 사용 가능한 자원들을 확인할 수 있다. 즉,

값이 '0'으로 설정되면, RRC 메시지를 사용하여 설정된 첫 번째 DM-RS 수열 정보, 첫 번째 CRS 자원 위치 설정 정보, 그리고 첫 번째 PDSCH 신호 송신 시작 위치 정보에 상응하게 DM-RS 수열 설정 정보 및 PDSCH 자원 설정 정보를 검출할 수 있다. On the other hand, if the DM-RS sequence setting information and the CRS resource location setting information as shown in Table 6 above include the PDSCH signal transmission start position setting information indicating the PDSCH signal transmission start position together, the following <Table 8> and together

It is possible to check DM-RS sequence configuration information according to the value and resources available for PDSCH signal transmission. In other words,

If the value is set to '0', the first DM-RS sequence information set using the RRC message, the first CRS resource location setting information, and the first PDSCH signal transmission start location information corresponding to the DM-RS sequence setting information and PDSCH resource configuration information can be detected.

값이 '1'로 설정될 경우, 상기 RRC 메시지를 사용하여 설정된 두 번째 DM-RS 수열 정보, 두 번째 CRS 자원 위치 정보, 그리고 두 번째 PDSCH 신호 송신 시작 위치 정보에 상응하게 DM-RS 수열 설정 및 PDSCH 자원 설정 정보를 검출할 수 있다.In contrast, the above

When the value is set to '1', the DM-RS sequence is set according to the second DM-RS sequence information, the second CRS resource location information, and the second PDSCH signal transmission start location information set using the RRC message, and PDSCH resource configuration information can be detected.

n _SCID DM-RS sequence setting CRS resource location setting PDSCH transmission start position (OFDM symbol position) setting 0 1 ^st DM-RS sequence configured by RRC 1 ^st set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 1 ^st RRC configuration for PDSCH starting OFDM symbol One 2 ^nd DM-RS sequence configured by RRC 2 ^nd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 2 ^nd RRC configuration for PDSCH starting OFDM symbol

값과 추가적인 1비트를 사용하여 DM-RS 수열 설정 정보 및 PDSCH 신호 송신 시작 정보를 검출할 수 있다.In a method different from the method shown in Table 8, if the DM-RS sequence setting information and CRS resource location setting information as shown in Table 7 are included together with the PDSCH signal transmission start location information, the following <Table 9> together with

DM-RS sequence setting information and PDSCH signal transmission start information can be detected by using a value and an additional 1 bit.

n _SCID Extra bit DM-RS sequence setting CRS resource location setting PDSCH transmission start position (OFDM symbol position) setting 0 0 1 ^st DM-RS sequence configured by RRC 1 ^st set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 1 ^st RRC configuration for PDSCH starting OFDM symbol 0 One 1 ^st DM-RS sequence configured by RRC 2 ^nd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 2 ^nd RRC configuration for PDSCH starting OFDM symbol One 0 2 ^nd DM-RS sequence configured by RRC 3 ^rd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 3 ^rd RRC configuration for PDSCH starting OFDM symbol One One 2 ^nd DM-RS sequence configured by RRC 4 ^th set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 4 ^th RRC configuration for PDSCH starting OFDM symbol

As described above, information indicating the relationship between the cell through which the PDSCH signal is transmitted and the CSI-RS may be transmitted to the UE together with DM-RS sequence configuration information, CRS resource position configuration information, and PDSCH transmission start position configuration information. If the UE can know the relationship between the cell through which the PDSCH signal is transmitted and the CSI-RS, the DM-RS using channel information estimated through a specific CSI-RS in the situation of estimating the DM-RS channel for PDSCH signal detection Channel estimation performance can be improved. Here, information indicating the relationship between the cell through which the PDSCH signal is transmitted and the CSI-RS is transmitted through an RRC message, and may include one of the following four pieces of information:

1. Information 1: PDSCH signal is transmitted in the first CSI-RS resource in the measurement set.

2. Information 2: PDSCH signal is transmitted on the second CSI-RS resource in the measurement set.

3. Information 3: PDSCH signal is transmitted on the third CSI-RS resource in the measurement set.

4. Information 4: The PDSCH signal is not transmitted through any CSI-RS resource in the measurement set.

That is, when the parameter related to the relationship between the cell through which the PDSCH signal is transmitted and the CSI-RS is set to one of the parameters 1 to 3, the UE is configured to transmit the PDSCH signal in the first to third CSI-RS resources in the measurement set, respectively. It detects that it is transmitted, estimates a DM-RS channel using channel information obtained from the corresponding CSI-RS, and detects a PDSCH signal. Here, the parameter for indicating the relationship between the cell in which the PDSCH signal is transmitted and the CSI-RS may be transmitted using an RRC message, and a parameter for indicating the relationship between the cell in which the PDSCH signal is transmitted and the CSI-RS It goes without saying that the included RRC message may be implemented as a separate new RRC message, or may be implemented using an existing RRC message. A detailed description of the RRC message itself including a parameter for indicating the relationship between the cell through which the PDSCH signal is transmitted and the CSI-RS will be omitted.

In contrast, when the parameter indicating the relationship between the cell in which the PDSCH signal is transmitted and the CSI-RS is set to the parameter 4, the UE does not use the channel information obtained from the CSI-RS for DM-RS channel estimation.

*Next, the cell and CSI-RS in which the PDSCH signal is transmitted in the DM-RS sequence setting information, CRS resource location setting information, and the PDSCH transmission start location (OFDM symbol location) setting information as shown in Table 8 above. When the relationship information of is included together, the UE is n _SCID as shown in Table 10 below. Resources available for setting a DMRS sequence according to a value and transmitting a PDSCH signal, and relationship information between a DM-RS and a CSI-RS may be detected.

값이 0으로 설정되면, 상기 UE는 RRC 메시지를 통해 설정된 첫 번째 DM-RS 수열 정보, 첫 번째 CRS 자원 위치 정보, 첫 번째 PDCCH 자원 정보, 그리고 첫 번째 DM-RS와 CSI-RS의 관계 정보를 따라 DM-RS 수열 설정 정보, PDSCH 자원 설정 정보, 및 DM-RS 채널 추정 정보를 검출하게 된다.That is, the above

When the value is set to 0, the UE provides the first DM-RS sequence information, the first CRS resource location information, the first PDCCH resource information, and the relationship information between the first DM-RS and the CSI-RS set through an RRC message. Accordingly, DM-RS sequence setting information, PDSCH resource setting information, and DM-RS channel estimation information are detected.

값이 1로 설정되면 RRC 메시지를 통해 설정된 두 번째 DM-RS 수열 정보, 두 번째 CRS 자원 위치 정보, 두 번째 PDCCH 자원 정보, 그리고 두 번째 DM-RS와 CSI-RS의 관계 정보를 따라 DM-RS 수열 설정 정보, PDSCH 자원 설정 정보 및 DM-RS 채널 추정 정보를 검출하게 된다.In contrast, the above

If the value is set to 1, the DM-RS according to the second DM-RS sequence information set through the RRC message, the second CRS resource location information, the second PDCCH resource information, and the relationship information between the second DM-RS and CSI-RS Sequence setting information, PDSCH resource setting information, and DM-RS channel estimation information are detected.

n _SCID DM-RS sequence setting CRS resource location setting PDSCH transmission start OFDM symbol setting DM-RS and CSI-RS relationship information 0 1 ^st DM-RS sequence configured by RRC 1 ^st set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 1 ^st RRC configuration for PDSCH starting OFDM symbol 1 ^st RRC configuration for co-location between CSI-RS and DM-RS(PDSCH) One 2 ^nd DM-RS sequence configured by RRC 2 ^nd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 2 ^nd RRC configuration for PDSCH starting OFDM symbol 2 ^nd RRC configuration for co-location between CSI-RS and DM-RS(PDSCH)

와 추가 1비트를 사용하여 DM-RS 수열 설정 정보, PDSCH 송신을 위해 사용 가능한 자원 및 DM-RS와 CSI-RS의 관계 정보를 검출할 수 있다.In Table 10, the relationship information between the DM-RS and the CSI-RS may be relationship information between the PDSCH signal transmission and the CSI-RS in Table 11. Next, the DM-RS sequence as shown in Table 9 above. When the information for the PDCCH resource is included in the configuration information, the CRS resource position configuration information, and the PDSCH transmission start position (OFDM symbol position) configuration information together, the UE is as shown in Table 11 below.

And the additional 1 bit can be used to detect DM-RS sequence configuration information, resources available for PDSCH transmission, and relationship information between the DM-RS and the CSI-RS.

n _SCID Extra bit DM-RS sequence setting CRS resource location setting PDSCH signal transmission start OFDM symbol setting DM-RS and CSI-RS relationship information 0 0 1 ^st DM-RS sequence configured by RRC 1 ^st set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 1 ^st RRC configuration for PDSCH starting OFDM symbol 1 ^st RRC configuration for co-location between CSI-RS and DM-RS(PDSCH) 0 One 1 ^st DM-RS sequence configured by RRC 2 ^nd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 2 ^nd RRC configuration for PDSCH starting OFDM symbol 3 ^rd RRC configuration for co-location between CSI-RS and DM-RS(PDSCH) One 0 2 ^nd DM-RS sequence configured by RRC 3 ^rd set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 3 ^rd RRC configuration for PDSCH starting OFDM symbol 4 ^th RRC configuration for co-location between CSI-RS and DM-RS(PDSCH) One One 2 ^nd DM-RS sequence configured by RRC 4 ^th set of [ v _shift (or PCID), MBSFN configuration, and # of CRS antenna ports] configured by RRC 4 ^th RRC configuration for PDSCH starting OFDM symbol 2 ^nd RRC configuration for co-location between CSI-RS and DM-RS(PDSCH)

In Table 11, the relationship information between the DM-RS and the CSI-RS may be relationship information between the PDSCH signal transmission and the CSI-RS in Table 11. In Tables 6 to 11, the DM-RS sequence is set. The information, resources available for PDSCH signal transmission, and the state of each bit in the DCI format for setting the are determined to correspond to information set using the RRC message. However, it goes without saying that the specific bit state is not set through the RRC message and may be fixed with specific information.

For example, in the last bit state '11' of Table 11, other information other than the DM-RS sequence setting information may not be set using an RRC message and may be set as shown in Table 12 below. In addition, in the present invention, it is also considered that a state other than the '11' state is set as shown in Table 12 below. In addition, some of all the information in the following <Table 12> may be delivered to the UE through the DCI format, and in this case, the column including the corresponding information in the following <Table 12> may be deleted.

n _SCID Extra bit DM-RS sequence setting CRS resource location setting PDSCH signal transmission start OFDM symbol information DM-RS and CSI-RS relationship information One One 2 ^nd DM-RS sequence configured by RRC CRS resource location of cell to which UE is connected Setting the starting position of the cell to which the UE is connected PDSCH is transmitted at the point where CRS is transmitted

<Embodiment 9/Embodiment 10/Embodiment 11> Meanwhile, in the LTE mobile communication system, the system information and paging information are transmitted from a cell to all UEs regardless of the capabilities of the UE. That is, the system information and paging information are transmitted to Release 8 UEs, Release 9 UEs and Release 10 UEs as well as Release 11 UEs.

Accordingly, the PDSCH RE mapping for the call information and system information must use the same PDSCH RE mapping as the PDSCH RE mapping of the serving cell. When the UE is scheduled with the system information or paging information, the PDCCH for the scheduling is a cyclic redundancy check of SI-RNTI or P-RNTI, respectively (cyclic redundancy check: CRC, hereinafter referred to as'CRC') Use.

Therefore, when the UE detects the PDCCH using the P-RNTI or SI-RNTI, the UE uses the PDSCH RE mapping of the serving cell as it is. In contrast, when the UE detects the PDCCH using RNTIs other than the P-RNTI or SI-RNTI, the UE maps a new PDSCH RE as described in the methods described in Table 13 or Table 14. You can use one of them.

Hereinafter, Tables 13 and 14 will be described as follows.

는 1개의 계층 혹은 2 개의 계층들의 PDSCH 송신과 함께 스케쥴링될 경우에 대해서는 0과 1 사이에서 스위칭된다. 상기 UE가 2개 보다 많은 계층들이 PDSCH 송신과 함께 구성될 경우,

는 0으로 고정된다. 따라서, 하기의 표 15 혹은 표 16이 사용될 경우, PDSCH RE 매핑은 상기 UE가 2개보다 많은 계층들의 PDSCH 송신들과 함께 스케쥴링될 경우 2개의 후보들간에 스위칭될 수 없다. 따라서, 표 13과 같이 2개 보다 많은 계층들의 PDSCH 송신에서 동적 포인트 선택(Dynamic Point Selection: DPS) 방식 및 JT방식을 지원하는 PDSCH RE 매핑을 가능하게 하는 추가 특징이 적용될 수 있다. 여기서, 상기 DPS 방식은 상기 DS 방식과 동일한 방식이다.In LTE Release 10,

Is switched between 0 and 1 for the case of being scheduled with PDSCH transmission of one layer or two layers. When the UE is configured with more than two layers of PDSCH transmission,

Is fixed to zero. Therefore, when Table 15 or Table 16 below is used, PDSCH RE mapping cannot be switched between two candidates when the UE is scheduled with PDSCH transmissions of more than two layers. Accordingly, as shown in Table 13, an additional feature for enabling PDSCH RE mapping supporting a dynamic point selection (DPS) method and a JT method may be applied in PDSCH transmission of more than two layers. Here, the DPS scheme is the same as the DS scheme.

Number of layers PDSCH RE mapping 1 or 2 Use Table 15 (or Table 16) More than 2 PDSCH RE mapping for JT scheme among all CoMP cells

의 값을 기반으로 하는 표 15(혹은 표 16)에 나타낸 바와 같은 PDSCH RE 매핑을 가정할 수 있다. 이와는 달리, 상기 UE가 2개를 초과하는 계층들의 PDSCH 송신과 함께 구성될 경우, 상기 UE는 모든 CoMP 셀들 중 상기 JT 방식에 대한 PDSCH RE를 가정할 것이다. 표 13에 대한 또 다른 방식으로서, 제2행과 제2열의 엔트리(entry)가 표 14와 같은, 상위 계층 시그널링에 의해 구성되는 셀들의 집합 중 상기 JT방식에 대한 PDSCH RE 매핑으로 대체될 수도 있다. 이 경우, 2개를 초과하는 계층들에 대한 PDSCH RE 매핑을 지시하기 위한 추가적인 RRC 시그널링이 도입되어야만 한다.Table 13 shows the PDSCH RE mapping for the number of scheduled layers. For Table 13, when a UE is configured with PDSCH transmissions of one or two layers, the UE is

PDSCH RE mapping as shown in Table 15 (or Table 16) based on the value of may be assumed. In contrast, when the UE is configured with PDSCH transmission of more than two layers, the UE will assume a PDSCH RE for the JT scheme among all CoMP cells. As another method for Table 13, the entries in the second row and the second column may be replaced by PDSCH RE mapping for the JT method among a set of cells configured by higher layer signaling as shown in Table 14. . In this case, additional RRC signaling for indicating PDSCH RE mapping to more than two layers must be introduced.

However, in Tables 13 and 14, PDSCH RE mapping is determined by whether the number of layers of PDSCH transmission is "1 or 2" or "exceeds 2". In the present invention, PDSCH RE mapping is Of course, it is not limited to whether the number of layers is "1 or 2" or "more than 2". That is, the switching point of the PDSCH RE mapping may be any number of layers. For example, the PDSCH RE mapping may be determined based on whether the number of layers of PDSCH transmission is "1" or "more than 1". In this example, this design assumption is that PDSCH transmission in excess of one layer for CoMP UEs may occur when the JT scheme is applied.

Number of layers PDSCH RE mapping 1 or 2 Use Table 15 (or Table 16) More than 2 PDSCH RE mapping for the JT scheme among a set of cells configured by higher layer signaling

Table 14 shows the PDSCH RE mapping for the number of scheduled layers. Herein, Tables 15 and 16 will be described as follows.

First, the indication of PDSCH RE mapping is related to the DMRS scrambling indication. The reason for the joint indication between DMRS scrambling and PDSCH RE mapping is that the determination of both DMRS scrambling and PDSCH RE mapping is related to which Transmiison Point (TP) is used for the PDSCH transmission.

이다) 중 상기 JT방식에 대한 PDSCH RE 매핑을 나타낸다. 여기서, K=1일 경우, RE_매핑(C₁)은 셀 C₁ 에 대한 PDSCH RE 매핑을 나타낸다.For example, the indication of the PDSCH RE mapping may be related to each of Table 17 or Table 18 as shown in Table 15 or Table 16. Here, C _i represents a cell, and RE mapping (C ₁ , C ₂ , …, C _K ) is the cells C ₁ , C ₂ ,… , C _K (however,

Is) shows the PDSCH RE mapping for the JT scheme. Here, when K=1, RE_mapping (C ₁ ) indicates PDSCH RE mapping for cell C ₁ .

Among a plurality of cells, there are two ways in which the UE decodes the PDSCH signal under the assumption of the PDSCH RE mapping for the JT scheme. The first scheme is that the UE decodes the PDSCH signal under the assumption that the eNB maps data bits to the REs in the order in which the UEs skip CRS positions for a plurality of cells for the JT scheme as shown in FIG. It is a rate-matching method. In contrast, the second scheme assumes that the eNB maps the data bits to the REs in the order of the serving cell, and punctures CRS locations for a plurality of cells for the JT scheme as shown in FIG. This is a puncturing method in which the UE decodes the PDSCH signal.

It should be noted that in order for the UE to determine the PDSCH RE mapping for cell C _i , the eNB must signal at least one of the following parameters to the UE:

a. C _i 's physical Cell-ID (or Cell-ID mod 6)

b. MBSFN subframe configuration information of C _i

c. Number of CRS ports on C _i

d. Subframe offset value of C _i from the reference (serving/primary) cell

e. Number of OFDM symbols assumed for the control region

를 사용하여 PDSCH 송신을 위해 스케쥴링된 서브 프레임에서 상기 2가지 집합들 중 하나를 결정할 수 있다.That is, when Table 15 is used, (D1, X1, RE_ mapping (C ₁ , C ₂ , …, C _K )) and (D2, X2, RE_ mapping (C _{K +1} , C _{K +2} , …) , C _K+L )) are configured for the UE through higher layer signaling, and then the UE is derived from DCI.

One of the two sets may be determined in a subframe scheduled for PDSCH transmission by using.

를 사용하여 PDSCH 송신을 위해 스케쥴링된 서브 프레임에서 상기 2가지 페어들 중 하나를 결정할 수 있다.In contrast, when Table 16 is used, (X1, RE_mapping (C ₁ , C ₂ , …, C _K )) and (X2, RE_ mapping (C _{K +1} , C _{K +2} , …, C _{K) +L} )) after the two pairs are configured for the UE through higher layer signaling, the UE is derived from DCI

One of the two pairs may be determined in a subframe scheduled for PDSCH transmission by using.

= 0"는 서빙 셀의 PDSCH RE 매핑을 나타내고, "

= 1"는 인접 셀의 PDSCH RE 매핑을 나타내도록 할 수 있다. 또한, 이와는 역으로 "

= 1"는 서빙 셀의 PDSCH RE 매핑을 나타내고, "

= 0"는 인접 셀의 PDSCH RE 매핑을 나타내도록 할 수 있다.In another way, the last columns of Tables 15 and 16 may include fixed PDSCH RE mapping without RRC signaling for the last columns, and thus "

= 0" represents the PDSCH RE mapping of the serving cell, "

= 1" can be made to indicate the PDSCH RE mapping of the adjacent cell. In addition, vice versa, "

= 1" represents the PDSCH RE mapping of the serving cell, "

= 0" may indicate the PDSCH RE mapping of the adjacent cell.

및

에 대한 PDSCH RE 매핑 (

)이 표현되어 있다.In Table 15,

And

PDSCH RE mapping for (

) Is expressed.

에 대한 PDSCH RE 매핑 (

)이 표현되어 있다.In Table 16,

PDSCH RE mapping for (

) Is expressed.

Hereinafter, Tables 17 and 18 will be described as follows.

First, in a scheme for realizing dynamic adaptation of a DMRS scrambling sequence, an initial value of the DMRS random sequence, such as Equation 2 below, is used for the UE:

는 LTE Release 10에서와 같이 0과 1 사이의 하향링크 제어 정보(downlink control information: DCI, 이하 'DCI'라 칭하기로 한다)에 의해 동적으로 결정된다. 상기 수학식 2에서 또 다른 파라미터

는

에 의해 주어지고, 여기서

는 상기 UE의 서빙(혹은 기본) 셀의 슬럿 번호를 나타내고,

는 [0, 9] 혹은 [-4, 5]와 같은 크기 10의 범위 내의

를 기반으로 하는 서브 프레임 오프셋 값을 나타낸다.In Equation 2,

Is dynamically determined by downlink control information (downlink control information: DCI, hereinafter referred to as'DCI') between 0 and 1 as in LTE Release 10. Another parameter in Equation 2

Is

Given by, where

Represents the slot number of the serving (or basic) cell of the UE,

Is within the range of size 10, such as [0, 9] or [-4, 5]

Represents a subframe offset value based on.

와 파라미터

를 결정하는 한 방식은 표 17을 사용하는 것이고, 상기 표 17에서 D1, X1, D2, X2는 상위 계층에 의해 시그널링된다. 즉, (D1, X1)와 (D2, X2)의 2 개의 페어들이 상위 계층 시그널링에 의해 UE에게 구성된 후, 상기 UE는 DCI에서 추출된

를 사용하여 PDSCH 송신을 위해 스케쥴링되는 1개의 서브 프레임에서 상기 2개의 페어들 중 하나를 결정할 수 있다.Above parameter

And parameters

One way to determine the is to use Table 17, and in Table 17, D1, X1, D2, and X2 are signaled by an upper layer. That is, after two pairs of (D1, X1) and (D2, X2) are configured to the UE by higher layer signaling, the UE is extracted from DCI.

One of the two pairs may be determined in one subframe scheduled for PDSCH transmission by using.

에 대한

가 표현되어 있다.Table 17 shows

for

Is expressed.

를 결정하는 또 다른 방식에서,

는 표 18을 사용하여 결정되며, 표 18에서 X1과 X2는 상위 계층에 의해 시그널링되고,

는 하기와 같이 결정된다:

In another way to determine,

Is determined using Table 18, in Table 18 X1 and X2 are signaled by the upper layer,

Is determined as follows:

일 경우, 상기 UE는 셀 i의 슬럿 번호를 사용한다.a.

In this case, the UE uses the slot number of cell i.

일 경우, 상기 슬럿 번호는 디폴트 값(일 예로,

)으로 설정된다.b. For all i,

In case of, the slot number is a default value (for example,

).

는 상기 UE가 적어도 한번 기준 신호 수신 전력(Reference Signal Received Power: RSRP, 이하 'RSRP'라 칭하기로 한다)를 보고한 셀들인 셀 1, 셀 2, …, 셀 M(Cell-1, Cell-2, …, Cell-M)의 Cell-ID들을 나타내거나, 혹은 eNB에 의해 시그널링되는 물리 Cell-ID들의 리스트에 포함되어 있는 Cell-ID들을 나타낸다.here,

Is the cells in which the UE reports the reference signal received power (Reference Signal Received Power: RSRP, hereinafter referred to as'RSRP') at least once. , Cell-IDs of the cell M (Cell-1, Cell-2, ..., Cell- M ), or Cell-IDs included in the list of physical Cell-IDs signaled by the eNB.

에 대한

가 표현되어 있다.Table 18 shows

for

Is expressed.

Herein, with reference to FIG. 16, a description will be given of a process in which the UE receives the PDSCH signal in the cellular wireless communication system according to the ninth embodiment of the present invention.

16 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a ninth embodiment of the present invention.

Referring to FIG. 16, first in step 1611, the UE receives a PDCCH signal for PDSCH scheduling and proceeds to step 1613. In step 1613, the UE checks whether SI-RNTI or P-RNTI is used for the PDCCH signal. As a result of the check, if SI-RNTI or P-RNTI is not used for the PDCCH signal, the UE proceeds to step 1615. In step 1615, the UE selects a new PDSCH RE mapping using Table 13 or Table 14, and proceeds to step 1619.

Meanwhile, if SI-RNTI or P-RNTI is used for the PDCCH signal as a result of the check in step 1613, the UE proceeds to step 1617. In step 1617, the UE selects the legacy PDSCH RE mapping of the serving cell and proceeds to step 1619.

In step 1619, the UE receives a PDSCH signal corresponding to the selected PDSCH RE mapping.

Meanwhile, in the CoMP transmission mode (corresponding to transmission mode 9 of LTE Release 10), the UEs combine the following DCI format (DCI format, hereinafter referred to as'DCI format') and RNTI in PDCCH (or ePDCCH). It can be scheduled by one of the following:

a. DCI format 2C and C-RNTI

b. DCI format 2C and SPS C-RNTI

c. DCI format 1A and C-RNTI

d. DCI format 1A and SPS C-RNTI

e. DCI format 1A and P-RNTI

f. DCI format 1A and SI-RNTI

g. DCI format 1A and RA-RNTI

h. DCI format 1C and P-RNTI

i. DCI format 1C and SI-RNTI

j. DCI format 1C and RA-RNTI

Here, C-RNTI denotes a cell RNTI (cell RNTI: C-RNTI, hereinafter referred to as'C-RNTI'), and SPS-C-RNTI denotes a semi-persistent scheduling cell RNTI (Semi-Persistent Scheduling C-RNTI: SPS-C-RNTI, hereinafter will be referred to as'SPS-C-RNTI'), and RA-RNTI is a random access RNTI (random access RNTI: RA-RNTI, hereinafter referred to as'RA-RNTI'). Show.

For the above combinations, the DCI format 2C is used for PDSCH scheduling up to layer 8 based on the DMRS, and the DCI format 2C includes indication fields for realizing possible dynamic CoMP operations. DCI format 1A is used for compact PDSCH scheduling having a small indication field.

* The DCI format 1C is used for very small PDSCH scheduling, and is used exclusively for scheduling or random access procedures for call information and system information. In addition, the C-RNTI is used for data scheduling, and the SPS C-RNTI is used for semi-persistent scheduling of data. The P-RNTI, SI-RNTI, and RA-RNTI exist for call information, system information, and random access messages, respectively.

For any UE, data is dedicated to the UE, so the data can be transmitted using the DPS scheme or JT. On the other hand, the call information and system information is broadcast information for a plurality of UEs including Release 8 UEs, Release 9 UEs and Release 10 UEs as well as Release 11 UEs.

The random access messages are used for various cases including loss of synchronization for the UE. Based on the description of the use of the DCI formats and RNTIs, a UE assumption for PDSCH RE mapping for each DCI format and RNTI combination in the CoMP transmission mode may be defined as shown in Table 19.

Combination of DCI format and RNTI PDSCH RE mapping DCI format 2C and C-RNTI New RE mapping for CoMP DCI format 2C and SPS C-RNTI New RE mapping for CoMP DCI format 1A and C-RNTI New RE mapping for CoMP DCI format 1A and SPS C-RNTI New RE mapping for CoMP DCI format 1A and P-RNTI Legacy RE mapping for serving cells DCI format 1A and SI-RNTI Legacy RE mapping for serving cells DCI format 1A and RA-RNTI Legacy RE mapping for serving cells DCI format 1C and P-RNTI Legacy RE mapping for serving cells DCI format 1C and SI-RNTI Legacy RE mapping for serving cells DCI format 1C and RA-RNTI Legacy RE mapping for serving cells

Table 19 shows UE assumptions on PDSCH RE mapping. In Table 19, the new RE mapping for CoMP means at least one of the PDSCH RE mapping schemes for CoMP as described above. The legacy RE mapping for the serving cell represents a PDSCH RE mapping method defined in the LTE Release 10 standard in each case.

When the UE assumption for PDSCH RE mapping as shown in Table 19 is used, switching between the new RE mapping and the legacy RE mapping may be based on RNTI. That is, when the C-RNTI or the SPS RNTI is used for scheduling of a CoMP UE, the new PDSCH RE mapping is applied. Unlike this, the P-RNTI and the SI-RNTI or RA-RNTI are used for the scheduling. In this case, the legacy PDSCH RE mapping is used.

Herein, with reference to FIG. 17, a description will be made of a process in which the UE receives the PDSCH signal in the cellular wireless communication system according to the tenth embodiment of the present invention.

17 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to a tenth embodiment of the present invention.

Referring to FIG. 17, first, in step 1711, the UE receives a PDCCH signal for PDSCH scheduling and proceeds to step 1713. In step 1713, the UE checks whether C-RNTI or SPS C-RNTI is used for the PDCCH signal. As a result of the check, if C-RNTI or SPS C-RNTI is used for the PDCCH signal, the UE proceeds to step 1715. In step 1715, the UE selects a new PDSCH RE mapping using Table 19 and proceeds to step 1719.

Meanwhile, if a C-RNTI or SPS C-RNTI is not used for the PDCCH signal as a result of the check in step 1713, the UE proceeds to step 1717. In step 1717, the UE selects the legacy PDSCH RE mapping of the serving cell and proceeds to step 1719.

In step 1719, the UE receives a PDSCH signal corresponding to the selected PDSCH RE mapping.

In FIG. 17, it should be noted that the UE may determine the PDSCH RE mapping of the UE between the new RE mapping and the legacy RE mapping after the UE detects both the DCI format and the RNTI. The decision may be based on Table 19.

Meanwhile, since DCI format 1A includes a small indication field, the DCI format 1A may not be suitable for CoMP scheduling. For this reason, data transmission according to DCI format 1A may not be used with the DPS method or the JT method. Based on this situation for the DCI format 1A, UE assumptions on PDSCH RE mapping for each of combinations of the DCI format and RNTI in the CoMP transmission mode may be defined as shown in Table 20.

Combination of DCI format and RNTI PDSCH RE mapping DCI format 2C and C-RNTI New RE mapping for CoMP DCI format 2C and SPS C-RNTI New RE mapping for CoMP DCI format 1A and C-RNTI Legacy RE mapping for serving cells DCI format 1A and SPS C-RNTI Legacy RE mapping for serving cells DCI format 1A and P-RNTI Legacy RE mapping for serving cells DCI format 1A and SI-RNTI Legacy RE mapping for serving cells DCI format 1A and RA-RNTI Legacy RE mapping for serving cells DCI format 1C and P-RNTI Legacy RE mapping for serving cells DCI format 1C and SI-RNTI Legacy RE mapping for serving cells DCI format 1C and RA-RNTI Legacy RE mapping for serving cells

Table 20 shows the UE assumption for PDSCH RE mapping. When the UE assumption for PDSCH RE mapping as shown in Table 20 is used, switching between the new RE mapping and the legacy RE mapping may be based on the DCI format. . That is, when the DCI format 2C is used for scheduling of the CoMP UE, the new PDSCH RE mapping is applied, and unlike this, when the DCI format 1A or DCI format 1C is used for the scheduling, the legacy PDSCH RE mapping is used. .

Herein, with reference to FIG. 18, a description will be made of a process in which the UE receives the PDSCH signal in the cellular wireless communication system according to the eleventh embodiment of the present invention.

18 is a flowchart schematically illustrating a process of a UE receiving a PDSCH signal in a cellular wireless communication system according to an eleventh embodiment of the present invention.

Referring to FIG. 18, first in step 1811, the UE receives a PDCCH signal for PDSCH scheduling and proceeds to step 1813. In step 1813, the UE checks whether DCI format 2C is used for the PDCCH signal. As a result of the check, if DCI format 2C is used for the PDCCH signal, the UE proceeds to step 1815. In step 1815, the UE selects a new PDSCH RE mapping using Table 20 and proceeds to step 1819.

Meanwhile, if DCI format 2C is not used for the PDCCH signal as a result of the check in step 1813, the UE proceeds to step 1817. In step 1817, the UE selects the legacy PDSCH RE mapping of the serving cell and proceeds to step 1819.

In step 1819, the UE receives a PDSCH signal corresponding to the selected PDSCH RE mapping.

* FIG. 18 describes an operation of detecting whether DCI format 2C is used for the PDCCH signal, and selecting a PDSCH RE mapping for use by the UE to receive a PDSCH signal according to the detection result. However, unlike this, when DCI format 2C is used for the PDCCH signal, the UE selects the legacy PDSCH RE mapping of the serving cell, and one of various DCI formats such as DCI format 1A and DCI format 1C for the PDCCH signal. Of course, when is used, the UE may select a new PDSCH RE mapping.

In FIG. 18, it should be noted that the UE may determine the PDSCH RE mapping of the UE between the new RE mapping and the legacy RE mapping after the UE detects both the DCI format and the RNTI. The decision may be based on Table 20.

이다) 중 JT 방식에 대한 PDSCH RE 매핑을 나타낸다. 여기서, K=1일 경우, RE_매핑(C₁)은 셀 C₁ 에 대한 PDSCH RE 매핑을 나타낸다. UE가 셀 C_i 에 대한 PDSCH RE 매핑을 결정하기 위해서, eNB는 하기와 같은 파라미터들 중 적어도 하나를 상기 UE로 시그널링해야만 한다:As another example, the indication of PDSCH RE mapping may be related to each of Table 23 or Table 24 as in Table 21 or Table 22. Here, C _i denotes a cell, and RE mapping (C ₁ , C ₂ , …, C _K ) is the cells C ₁ , C ₂ ,… , C _K (however,

Denotes PDSCH RE mapping for the JT scheme. Here, when K=1, RE_mapping (C ₁ ) indicates PDSCH RE mapping for cell C ₁ . In order for the UE to determine the PDSCH RE mapping for cell C _i , the eNB must signal at least one of the following parameters to the UE:

a. C _i 's physical Cell-ID (or Cell-ID mod 6)

b. MBSFN subframe configuration of C _i

c. Number of CRS ports on C _i

d. Subframe offset value of C _i from the reference (serving/primary) cell

e. Number of OFDM symbols assumed for the control region

를 사용하여 PDSCH 송신을 위해 스케쥴링된 서브 프레임에서 상기 2가지 집합들 중 하나를 결정할 수 있다.That is, when Table 21 is used, (D1, X1, RE_ mapping (C ₁ , C ₂ , …, C _K )) and (D2, X2, RE_ mapping (C _{K +1} , C _{K +2} , …) , C _K+L )) are configured for the UE through higher layer signaling, and then the UE is derived from DCI.

One of the two sets may be determined in a subframe scheduled for PDSCH transmission by using.

를 사용하여 PDSCH 송신을 위해 스케쥴링된 서브 프레임에서 상기 2가지 페어들 중 하나를 결정할 것이다.In contrast, when Table 22 is used, (X1, RE_mapping (C ₁ , C ₂ , …, C _K )) and (X2, RE_ mapping (C _{K +1} , C _{K +2} , …, C _{K) +L} )) after the two pairs are configured for the UE through higher layer signaling, the UE is derived from DCI

One of the two pairs will be determined in a subframe scheduled for PDSCH transmission by using.

PDSCH RE mapping 0 D1 X1 RE_mapping(C ₁ , C ₂ , …, C _K ) One D2 X2 RE_mapping(C _{K +1} , C _{K +2} , …, C _K+L )

에 대한 PDSCH RE 매핑이 표현되어 있다.Table 21 shows

PDSCH RE mapping for is represented.

PDSCH RE mapping 0 X1 RE_mapping(C ₁ , C ₂ , …, C _K ) One X2 RE_mapping(C _{K +1} , C _{K +2} , …, C _K+L )

에 대한 PDSCH RE 매핑 (

)이 표현되어 있다.그러면 여기서 표 23 및 표 24에 대해서 설명하면 다음과 같다.Table 22 shows

PDSCH RE mapping for (

In this case, Table 23 and Table 24 will be described as follows.

First, in another method for realizing dynamic adaptation of the DMRS scrambling sequence, an initial value of the DMRS scrambling sequence, such as Equation 3 below, is used for the UE:

는 PDSCH 스케쥴링에 대한 하향링크 제어 정보(downlink control information: DCI, 이하 'DCI'라 칭하기로 한다)에 의해 Release 10에서와 같이 0과 1간에 동적으로 결정되고,

는 PDSCH 스케쥴링에 대한 DCI에 의해 결정되는 추가 동적 파라미터로서, [0, N-1] 범위에 있는 정수들 중 하나가 된다.In Equation 3,

Is dynamically determined between 0 and 1 as in Release 10 according to downlink control information for PDSCH scheduling (downlink control information: DCI, hereinafter referred to as'DCI'),

Is an additional dynamic parameter determined by DCI for PDSCH scheduling, and becomes one of integers in the range [0, N- 1].

와

는 PDSCH 스케쥴링에 대한 DCI format을 사용하여 조인트 코딩된(jointly coded) 2개의 서로 다른 DCI 필드들 혹은 1개의 DCI 필드에서 추출될 수 있다.

와

가 서로 다른 필드들을 가질 경우,

는 안테나 포트(들), 스크램블링 식별자 및 계층들의 개수를 나타내는 레가시 3-비트 필드로부터 도출될 수 있으며,

는 각각 N=2 혹은 N=4를 가지는 1비트 필드 혹은 2 비트 필드들로부터 도출될 수 있다. 이와는 달리,

와

가 1개의 DCI 필드에서 조인트 코딩될 경우,

와

는 안테나 포트(들)와, 스크램블링 식별자(

)와,

와, 계층들의 개수를 나타내는 3비트 필드와, 4비트 필드, 혹은 5비트 필드로부터 도출될 수 있다.In addition, in Equation 3

Wow

May be extracted from two different DCI fields or one DCI field that are jointly coded using the DCI format for PDSCH scheduling.

Wow

Has different fields,

May be derived from a legacy 3-bit field indicating the antenna port(s), the scrambling identifier, and the number of layers,

May be derived from a 1-bit field or 2-bit fields having N =2 or N =4, respectively. Unlike this,

Wow

Is joint-coded in one DCI field,

Wow

Is the antenna port(s) and the scrambling identifier (

)Wow,

And, a 3-bit field indicating the number of layers, a 4-bit field, or a 5-bit field.

는

과 같이 주어지고, 여기서

는 상기 UE의 서빙(혹은 기본) 셀의 슬럿 번호를 나타내고,

는 [0, 9] 혹은 [-4, 5]와 같은 크기 10의 범위 내의

를 기반으로 하는 서브 프레임 오프셋 값을 나타낸다. 상기 파라미터

와 파라미터

를 결정하는 한 방식은 표 23을 사용하는 것이고, 표 23에서 D1, X1, D2, X2 는 상위 계층에 의해 시그널링된다.In addition, another parameter in Equation 3

Is

Is given as, where

Represents the slot number of the serving (or basic) cell of the UE,

Is within the range of size 10, such as [0, 9] or [-4, 5]

Represents a subframe offset value based on. Above parameter

And parameters

One way to determine the is to use Table 23, in Table 23 D1, X1, D2, X2 are signaled by the upper layer.

가 0과 1 사이에서 결정된다는 것이다. 즉, (D1, X1)와 (D2, X2)의 2개의 페어들이 상위 계층 시그널링에 의해 상기 UE에게 구성된 후, 상기 UE는 DCI에서 추출된

를 사용하여 PDSCH 송신을 위해 스케쥴링되는 1개의 서브 프레임에서 상기 2개의 페어들 중 하나를 결정할 수 있다.The assumptions in Table 23 are

Is determined between 0 and 1. That is, after two pairs of (D1, X1) and (D2, X2) are configured in the UE by higher layer signaling, the UE is extracted from DCI.

One of the two pairs may be determined in one subframe scheduled for PDSCH transmission by using.

에 대한

가 표현되어 있다.In Table 23,

for

Is expressed.

를 결정하는 또 다른 방식에서,

는 표 24를 사용하여 결정되며, 표 24에서 X1과 X2는 상위 계층에 의해 시그널링되고,

는 하기와 같이 결정된다:

In another way to determine,

Is determined using Table 24, in Table 24 X1 and X2 are signaled by the upper layer,

Is determined as follows:

일 경우, 상기 UE는 셀 i의 슬럿 번호를 사용한다.a.

In this case, the UE uses the slot number of cell i.

일 경우, 상기 슬럿 번호는 디폴트 값(일 예로,

)으로 설정된다.b. For all i,

In case of, the slot number is a default value (for example,

).

는 상기 UE가 적어도 한번 RSRP를 보고한 셀들인 셀 1, 셀 2, …, 셀 M(Cell-1, Cell-2, …, Cell-M)의 Cell-ID들을 나타내거나, 혹은 eNB에 의해 시그널링되는 물리 Cell-ID들의 리스트에 포함되어 있는 Cell-ID들을 나타낸다.here,

Is the cells in which the UE reports RSRP at least once, Cell 1, Cell 2, ... , Cell-IDs of the cell M (Cell-1, Cell-2, ..., Cell- M ), or Cell-IDs included in the list of physical Cell-IDs signaled by the eNB.

가 표현되어 있다.Table 24 shows

Is expressed.

이다) 중 JT에 대한 PDSCH RE 매핑을 나타낸다. 여기서, K=1일 경우, RE_매핑(C₁)은 셀 C₁ 에 대한 PDSCH RE 매핑을 나타낸다. UE가 셀 C_i 에 대한 PDSCH RE 매핑을 결정하기 위해서, eNB는 하기와 같은 파라미터들 중 적어도 하나를 상기 UE로 시그널링해야만 한다:As another example, the indication of PDSCH RE mapping may be related to each of Table 27 or Table 28 as shown in Table 25 or 26. Here, C _i denotes a cell, and RE mapping (C ₁ , C ₂ , …, C _K ) is the cells C ₁ , C ₂ ,… , C _K (however,

Denotes PDSCH RE mapping for JT. Here, when K=1, RE_mapping (C ₁ ) indicates PDSCH RE mapping for cell C ₁ . In order for the UE to determine the PDSCH RE mapping for cell C _i , the eNB must signal at least one of the following parameters to the UE:

a. C _i 's physical Cell-ID (or Cell-ID mod 6)

b. MBSFN subframe configuration of C _i

c. Number of CRS ports on C _i

d. Subframe offset value of C _i from the reference (serving/primary) cell

e. Number of OFDM symbols assumed for the control region

를 사용하여 PDSCH 송신을 위해 스케쥴링된 서브 프레임에서 상기 4가지 집합들 중 하나를 결정할 수 있다.That is, if Table 25 is used, (D1, X1, RE_ mapping (C ₁ , C ₂ , …, C _K )) and (D2, X2, RE_ mapping (C _{K +1} , C _{K +2)} , …, C _K+L )) and, (D3, X3, RE_mapping (C _{K+L +1} , C _{K + L +2} , …, C _K+L+P )) and, (D4, X4 , 4 sets of RE_mapping (C _{K +L+P+1} , C _{K + L + P +2} , …, C _K+L+P+Q )) are configured for the UE through higher layer signaling After that, the UE is derived from DCI

One of the four sets may be determined in a subframe scheduled for PDSCH transmission by using.

를 사용하여 PDSCH 송신을 위해 스케쥴링된 서브 프레임에서 상기 4가지 페어들 중 하나를 결정할 수 있다.In contrast, when Table 26 is used, (X1, RE_ mapping (C ₁ , C ₂ , …, C _K )) and, (X2, RE_ mapping (C _{K +1} , C _{K +2} , …, C _K+L )) and (X3, RE_mapping(C _{K+L +1} , C _{K + L +2} , …, C _K+L+P )) and (X4, RE_mapping(C _{K After} 4 pairs of _+L+P+1 , C _{K + L + P +2} , …, C _K+L+P+Q )) are configured for the UE through higher layer signaling, the UE is in DCI Derived

One of the four pairs may be determined in a subframe scheduled for PDSCH transmission by using.

에 대한 PDSCH RE 매핑 (

)이 표현되어 있다. Table 25 shows

PDSCH RE mapping for (

) Is expressed.

PDSCH RE mapping (0, 0) X1 RE_ mapping (C ₁ , C ₂ , …, C _K ) (0, 1) X2 RE_ mapping (C _{K +1} , C _{K +2} , …, C _K+L ) (1, 0) X3 RE_ mapping (C _{K+L +1} , C _{K + L +2} , …, C _K+L+P ) (1, 1) X4 RE_ mapping (C _{K +L+P+1} , C _{K + L + P +2} , …, C _K+L+P+Q )

에 대한 PDSCH RE 매핑 (

,

,

,

)이 표현되어 있다.다음으로, 표 27 및 표 28에 대해서 설명하기로 한다. Table 26 shows

PDSCH RE mapping for (

,

,

,

) Is expressed. Next, Tables 27 and 28 will be described.

In another method for realizing dynamic adaptation of the DMRS scrambling sequence, an initial value of the DMRS scrambling sequence, such as Equation 4 below, is used for the UE:

는 PDSCH 스케쥴링에 대한 하향링크 제어 정보(downlink control information: DCI, 이하 'DCI'라 칭하기로 한다)에 의해 Release 10에서와 같이 0과 1간에 동적으로 결정되고,

는 PDSCH 스케쥴링에 대한 DCI에 의해 결정되는 추가 동적 파라미터로서, [0, N-1] 범위에 있는 정수들 중 하나가 된다. 또한, 상기 수학식 4에서

와

는 PDSCH 스케쥴링에 대한 DCI format을 사용하여 조인트 코딩된(jointly coded) 2개의 서로 다른 DCI 필드들 혹은 1개의 DCI 필드에서 추출될 수 있다. In Equation 4,

Is dynamically determined between 0 and 1 as in Release 10 according to downlink control information for PDSCH scheduling (downlink control information: DCI, hereinafter referred to as'DCI'),

Is an additional dynamic parameter determined by DCI for PDSCH scheduling, and becomes one of integers in the range [0, N- 1]. In addition, in Equation 4

Wow

May be extracted from two different DCI fields or one DCI field that are jointly coded using the DCI format for PDSCH scheduling.

와

가 서로 다른 필드들을 가질 경우,

는 안테나 포트(들), 스크램블링 식별자 및 계층들의 개수를 나타내는 레가시 3-비트 필드로부터 도출될 수 있으며,

는 각각 N=2 혹은 N=4를 가지는 1비트 필드 혹은 2 비트 필드들로부터 도출될 수 있다. 이와는 달리,

와

가 1개의 DCI 필드에서 조인트 코딩될 경우,

와

는 안테나 포트(들)와, 스크램블링 식별자(

)와,

와, 계층들의 개수를 나타내는 3비트 필드와, 4비트 필드, 혹은 5비트 필드로부터 도출될 수 있다.

Wow

Has different fields,

May be derived from a legacy 3-bit field indicating the antenna port(s), the scrambling identifier, and the number of layers,

May be derived from a 1-bit field or 2-bit fields having N =2 or N =4, respectively. Unlike this,

Wow

Is joint-coded in one DCI field,

Wow

Is the antenna port(s) and the scrambling identifier (

)Wow,

And, a 3-bit field indicating the number of layers, a 4-bit field, or a 5-bit field.

는

와 같이 주어지고, 여기서

는 상기 UE의 서빙(혹은 기본) 셀의 슬럿 번호를 나타내고,

는 [0, 9] 혹은 [-4, 5]와 같은 크기 10의 범위 내의

의 페어를 기반으로 하는 서브 프레임 오프셋 값을 나타낸다. 상기 파라미터

와

를 결정하는 한 방식은 표 27을 사용하는 것이고, 표 27에서 D1, D2, D3, D4, X1, X2, X3, X4는 상위 계층에 의해 시그널링된다.Another parameter in Equation 4

Is

Is given as, where

Represents the slot number of the serving (or basic) cell of the UE,

Is within the range of size 10, such as [0, 9] or [-4, 5]

Represents a subframe offset value based on a pair of. Above parameter

Wow

One way to determine a is to use Table 27, and in Table 27, D1, D2, D3, D4, X1, X2, X3, X4 are signaled by higher layers.

가 0과 1 사이에서 결정된다는 것이다. 즉, (D1, X1), (D2, X2), (D3, X3), (D4, X4)의 4개의 페어들이 상위 계층 시그널링에 의해 상기 UE에게 구성된 후, 상기 UE는 DCI에서 추출된

를 사용하여 PDSCH 송신을 위해 스케쥴링되는 1개의 서브 프레임에서 상기 4개의 페어들 중 하나를 결정할 것이다.The assumptions in Table 27 are

Is determined between 0 and 1. That is, after the four pairs of (D1, X1), (D2, X2), (D3, X3), (D4, X4) are configured to the UE by higher layer signaling, the UE is extracted from DCI.

One of the four pairs will be determined in one subframe scheduled for PDSCH transmission by using.

가 표현되어 있다.Table 27 shows

Is expressed.

를 결정하는 또 다른 방식에서,

는 표 28을 사용하여 결정되며, 표 28에서 X1, X2, X3, X4 는 상위 계층에 의해 시그널링되고,

는 하기와 같이 결정된다:

In another way to determine,

Is determined using Table 28, in Table 28 X1, X2, X3, X4 are signaled by the upper layer,

Is determined as follows:

일 경우, 상기 UE는 셀 i의 슬럿 번호를 사용한다.a.

In this case, the UE uses the slot number of cell i.

일 경우, 상기 슬럿 번호는 디폴트 값(일 예로,

)으로 설정된다.b. For all i,

In case of, the slot number is a default value (for example,

).

는 상기 UE가 적어도 한번 RSRP를 보고한 셀들인 셀 1, 셀 2, …, 셀 M(Cell-1, Cell-2, …, Cell-M)의 Cell-ID들을 나타내거나, 혹은 eNB에 의해 시그널링되는 물리 Cell-ID들의 리스트에 포함되어 있는 Cell-ID들을 나타낸다.here,

Is the cells in which the UE reports RSRP at least once, Cell 1, Cell 2, ... , Cell-IDs of the cell M (Cell-1, Cell-2, ..., Cell- M ), or Cell-IDs included in the list of physical Cell-IDs signaled by the eNB.

에 대한

가 표현되어 있다.In Table 28,

for

Is expressed.

Next, an internal structure of a UE in a cellular wireless communication system according to an embodiment of the present invention will be described with reference to FIG. 19.

19 is a diagram schematically illustrating an internal structure of a UE in a cellular wireless communication system according to an embodiment of the present invention.

Referring to FIG. 19, the UE includes a receiving unit 1911, a control unit 1913, a transmitting unit 1915, and a storage unit 1917.

The control unit 1913 controls the overall operation of the UE. In particular, control is performed to perform overall operations related to PDSCH signal reception according to the first to eleventh embodiments of the present invention. Here, the overall operation related to the reception of the PDSCH signal is the same as described with reference to FIGS. 4 to 18, and thus a detailed description thereof will be omitted.

The receiving unit 1911 receives various signals, etc. from a central control device, a base station, etc. under the control of the control unit 1913. Here, since the various signals received by the receiving unit 1911 are the same as those described in FIGS. 4 to 18, detailed descriptions thereof will be omitted here.

The transmission unit 1915 transmits various signals and the like to a central control unit, a base station, and the like under the control of the control unit 1913. Here, since the various signals transmitted by the transmission unit 1915 are the same as those described in FIGS. 4 to 18, detailed descriptions thereof will be omitted here.

The storage unit 1917 stores various signals received by the reception unit 1911 and various data necessary for the operation of the UE, particularly information related to a PDSCH signal reception operation.

Meanwhile, FIG. 19 shows a case in which the reception unit 1911, the control unit 1913, the transmission unit 1915, the storage unit 1917, and the output unit 1919 are implemented as separate units. However, the receiving unit 1911, the control unit 1913, the transmission unit 1915, the storage unit 1917, and the output unit 1919 can be implemented as an integrated unit integrated into one unit. to be.

In FIG. 19, the internal structure of the UE in the cellular wireless communication system according to the embodiment of the present invention has been described. Next, the internal structure of the central control apparatus in the cellular wireless communication system according to the present invention is described with reference to FIG. Let's explain.

20 is a diagram schematically showing an internal structure of a central control device in a cellular wireless communication system according to an embodiment of the present invention.

Referring to FIG. 20, the central control device includes a reception unit 2011, a control unit 2013, a transmission unit 2015, and a storage unit 2017.

The control unit 2013 controls the overall operation of the central control device. In particular, control is performed to perform the overall operation related to the operation of receiving the PDSCH signal of the UE according to the first to eleventh embodiments of the present invention. Here, the overall operation related to the operation of receiving the PDSCH signal of the UE is the same as described with reference to FIGS. 4 to 18, and thus a detailed description thereof will be omitted.

The receiving unit 2011 receives various signals from the UE and the base station under the control of the control unit 2013. Here, since the various signals received by the receiving unit 2011 are the same as those described in FIGS. 4 to 18, detailed descriptions thereof will be omitted here.

The transmission unit 2015 transmits various signals to the UE and the base station under the control of the control unit 2013. Here, since the various signals transmitted by the transmission unit 2015 are the same as those described in FIGS. 4 to 18, detailed descriptions thereof will be omitted here.

The storage unit 2017 stores various signals received by the reception unit 2011, and various data necessary for the operation of the central control apparatus, in particular, information related to a PDSCH signal reception operation of the UE.

Meanwhile, FIG. 20 illustrates a case in which the reception unit 2011, the control unit 2013, the transmission unit 2015, and the storage unit 2017 are implemented as separate units, but the reception unit ( 2011), the control unit 2013, the transmission unit 2015, and the storage unit 2017 can be implemented as an integrated unit integrated into one unit.

Meanwhile, although specific embodiments have been described in the detailed description of the present invention, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined by the scope of the claims to be described later, as well as the scope and equivalents of the claims.

Claims (20)

In a method performed by a terminal in a wireless communication system,
Using radio resource control (RRC) signaling, first information on resources to be excluded when mapping to a downlink physical shared channel (PDSCH) in a serving cell and second information on one or more start symbols related to transmission on the PDSCH Receiving configuration information including information from a base station;
Receiving, from the base station, control information for scheduling transmission on the PDSCH through a downlink physical control channel (PDCCH), wherein the control information is a first for identifying one start symbol among the one or more start symbols. Receiving the control information that includes 3 information; And
And receiving downlink data from the base station on resources associated with the PDSCH based on the first information and the start symbol. The method of claim 1,
The configuration information further includes fourth information on at least two scrambling identifiers for a demodulation reference signal (DMRS) related to the PDSCH,
The control information further includes fifth information for identifying one scrambling identifier among the at least two scrambling identifiers. The method of claim 2,
Identifying the scrambling identifier among the at least two scrambling identifiers based on the fifth information; And
The method performed by the terminal further comprising the step of identifying the sequence of the DMRS based on the scrambling identifier. The method of claim 1, wherein the first information includes information on a multimedia broadcasting multicast service single frequency network (MBSFN) subframe configuration, a number of cell specific reference signal (CRS) ports, and information on a CRS resource location. Phosphorus, a method performed by the terminal. The method of claim 1, wherein the configuration information includes information on co-location between a demodulation reference signal (DMRS) of the PDSCH and at least one downlink reference signal and at least one state information reference signal (CSI-RS). To further include information on the resources of the method performed by the terminal. In a method performed by a base station in a wireless communication system,
Using radio resource control (RRC) signaling, first information on resources to be excluded when mapping to a downlink physical shared channel (PDSCH) in a serving cell and second information on one or more start symbols related to transmission on the PDSCH Transmitting configuration information including information to the terminal;
Transmitting control information for scheduling transmission on the PDSCH to the terminal through a downlink physical control channel (PDCCH), wherein the control information is a first for identifying one of the one or more start symbols. Transmitting the control information that includes 3 information; And
And transmitting downlink data to the terminal on resources associated with the PDSCH based on the first information and the third information. The method of claim 6,
The configuration information further includes fourth information on at least two scrambling identifiers for a demodulation reference signal (DMRS) related to the PDSCH,
Wherein the control information further includes fifth information for identifying one of the at least two scrambling identifiers. The method of claim 7,
Identifying the scrambling identifier among the at least two scrambling identifiers based on the fifth information; And
Further comprising the step of identifying the sequence of the DMRS based on the scrambling identifier. The method of claim 6, wherein the first information includes information on a multimedia broadcasting multicast service single frequency network (MBSFN) subframe configuration, a number of cell specific reference signal (CRS) ports, and information on a CRS resource location. Phosphorus, a method performed by a base station. The method of claim 6, wherein the configuration information comprises information on co-location between a demodulation reference signal (DMRS) of the PDSCH and at least one downlink reference signal and at least one state information reference signal (CSI-RS). The method performed by the base station to further include information on the resources of. In a terminal in a wireless communication system,
Transceiver; And
First information about resources to be excluded when mapping to a downlink physical shared channel (PDSCH) in a serving cell using radio resource control (RRC) signaling and second information about one or more start symbols related to transmission on the PDSCH Control information for receiving configuration information from the base station through the transceiver and scheduling transmission on the PDSCH through a downlink physical control channel (PDCCH)-The control information is the start of one of the one or more start symbols Including third information for identifying a symbol-is received from the base station through the transceiver, and downlink data on resources associated with the PDSCH is transmitted through the transceiver based on the first information and the start symbol. Terminal comprising at least one processor, configured to receive from a base station. The method of claim 11,
The configuration information further includes fourth information on at least two scrambling identifiers for a demodulation reference signal (DMRS) related to the PDSCH,
The control information further includes fifth information for identifying one scrambling identifier among the at least two scrambling identifiers. The method of claim 12, wherein the at least one processor is further configured to identify the scrambling identifier among the at least two scrambling identifiers based on the fifth information, and to identify the sequence of the DMRS based on the scrambling identifier. Phosphorus, terminal. The method of claim 11, wherein the first information includes information on a multimedia broadcasting multicast service single frequency network (MBSFN) subframe configuration, a number of cell specific reference signal (CRS) ports, and information on a CRS resource location. Phosphorus, terminal. The method of claim 11, wherein the configuration information comprises information on co-location between a demodulation reference signal (DMRS) of the PDSCH and at least one downlink reference signal and at least one state information reference signal (CSI-RS). To further include information on the resources of the terminal. In a base station in a wireless communication system,
Transceiver; And
First information about resources to be excluded when mapping to a downlink physical shared channel (PDSCH) in a serving cell using radio resource control (RRC) signaling and second information about one or more start symbols related to transmission on the PDSCH Control information for transmitting configuration information including: to a terminal through the transceiver and scheduling transmission on the PDSCH through a downlink physical control channel (PDCCH)-The control information is the start of one of the one or more start symbols Including third information for identifying a symbol-is transmitted to the terminal through the transceiver, and downlink data on resources associated with the PDSCH is transmitted through the transceiver based on the first information and the third information. The base station comprising at least one processor, configured to transmit to the terminal. The method of claim 16,
The configuration information further includes fourth information on at least two scrambling identifiers for a demodulation reference signal (DMRS) related to the PDSCH,
The control information further includes fifth information for identifying one scrambling identifier among the at least two scrambling identifiers. The method of claim 17, wherein the at least one processor is further configured to identify the scrambling identifier among the at least two scrambling identifiers based on the fifth information, and to identify the sequence of the DMRS based on the scrambling identifier. Phosphorus, base station. The method of claim 16, wherein the first information includes information on a multimedia broadcasting multicast service single frequency network (MBSFN) subframe configuration, a number of cell specific reference signal (CRS) ports, and information on a CRS resource location. Phosphorus, base station. The method of claim 16, wherein the configuration information includes information on co-location between a demodulation reference signal (DMRS) of the PDSCH and at least one downlink reference signal and at least one state information reference signal (CSI-RS). To further include information about the resources of the base station.

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