WO2014098394A1

WO2014098394A1 - Method and device for signaling downlink reference signal configuration information, and method and device for receiving downlink reference signal configuration information

Info

Publication number: WO2014098394A1
Application number: PCT/KR2013/011241
Authority: WO
Inventors: 윤성준
Original assignee: 주식회사 팬택
Priority date: 2012-12-18
Filing date: 2013-12-05
Publication date: 2014-06-26
Also published as: KR20140079649A

Abstract

The present invention relates to signaling downlink reference signal configuration information by a base station to a terminal in a multi-user multiple-input multiple-output (MU-MIMO) environment and includes transmitting, to the terminal, four or five bits of control information for specifying, from a table, an antenna port, a scrambling ID, and the number of layers used when transmitting the downlink reference signal, wherein the table includes, for one codeword, N (> 4) fields indicating one layer, one antenna port, and one scrambling ID, three fields indicating one of two to four layers and two to four antenna ports corresponding thereto, and includes, for two codewords, N/2 fields indicating two layers, two antenna ports and one scrambling ID, and six fields indicating one of three to eight layers, three to eight antenna ports corresponding thereto, and one scrambling ID.

Description

Method and apparatus for signaling downlink reference signal configuration information and method and apparatus for receiving downlink reference signal

The present invention relates to a method and apparatus for signaling configuration information of a downlink reference signal in a multiple input multiple output (MIMO) environment of a wireless communication system, and a method and apparatus for receiving a downlink reference signal.

In order to demodulate a downlink signal or estimate a channel state in a wireless communication system, the base station may transmit a downlink reference signal. A downlink DeModulation Reference Signal (DM-RS) or a UE-specific Reference Signal (DM-RS), which is a reference signal used for demodulating a downlink signal, is associated with transmission of a data channel (eg, a Physical Downlink Shared CHannel (PDSCH)), It is mainly transmitted for channel measurement for demodulation.

In order for the terminal to receive the downlink DM-RS, the base station, the number of layers used when transmitting the downlink DM-RS of the configuration information for the downlink DM-RS, antenna port and scrambling Information such as a scrambling identity may be configured and signaled through downlink control information such as downlink control information (DCI).

Meanwhile, multiple input multiple output (MIMO) technology may be used to increase the capacity of wireless communication. MIMO technology is a technology in which the base station and the terminal to increase the capacity by using a plurality of antennas. MIMO technology is a single user MIMO (SU-MIMO) technology that allocates all antenna resources of a base station to a user (terminal) and MU-MIMO (Multi-distribution of antenna resources or radio space resources that are allocated to multiple users (terminals). User MIMO) technology. In the case of MU-MIMO, it may be required to increase the maximum number of terminals possible.

An object of the present invention is to provide a method and apparatus for signaling downlink reference signal configuration information that can increase the maximum number of terminals that can be supported in a MIMO environment of a wireless communication system, and a method and apparatus for receiving a downlink reference signal. It is done.

An embodiment of the present invention is a method for signaling downlink reference signal configuration information to a terminal by a base station in a multi-user-multiple input multiple-output (MU-MIMO) environment, and an antenna used when transmitting the downlink reference signal And transmitting 4 or 5 bits of control information for specifying the port, the scrambling ID, and the number of layers in the table to the terminal, wherein the table includes 1 layer number for 1 codeword, One antenna port, N (N> 4) fields indicating one scrambling ID, and one of two to four layers, and three fields indicating two to four antenna ports corresponding thereto. And, for two codewords, out of two layers, two antenna ports, N / 2 fields indicating one scrambling ID, and three to eight layers. And, thus provides a signaling method for the corresponding three to eight antenna ports, the reference downlink comprising the six field for indicating the one scrambling ID signal configuration information.

Another embodiment of the present invention is a method of receiving a downlink reference signal by a terminal in a multi user-multiple input multiple-output (MU-MIMO) environment, and includes an antenna port and a scrambling ID used when transmitting the downlink reference signal. And 4 or 5 bits of control information from the base station for specifying the number information of the layers in the table; And demodulating the downlink reference signal using the antenna port, the scrambling ID, and the number information of the layer specified based on the control information, wherein the table includes: number of layers for one codeword One, one antenna port, N (N> 4) fields indicating one scrambling ID, and one of two to four layers, three corresponding to two to four antenna ports corresponding thereto. A field, and for two codewords, one of two layers, two antenna ports, an N / 2 field indicating one scrambling ID, and three to eight layers corresponding thereto. It provides a downlink reference signal receiving method comprising three to eight antenna ports, six fields indicating one scrambling ID.

Another embodiment of the present invention is a terminal for receiving a downlink reference signal in a multi user-multiple input multiple-output (MU-MIMO) environment, an antenna port used for transmitting the downlink reference signal, a scrambling ID, and A control information receiver configured to receive 4 or 5 bits of control information from the base station for specifying the number information of the layers in the table; And a reference signal receiver for demodulating the downlink reference signal using the antenna port, the scrambling ID, and the number of layers of information specified based on the control information, wherein the table includes: One (1) number of layers, one antenna port, N (N> 4) fields indicating one scrambling ID, one of two to four layers, and two to four antenna ports corresponding thereto. Three fields, for two codewords, one of two layers, two antenna ports, N / 2 fields indicating one scrambling ID, and three to eight layers, It provides a terminal comprising three fields corresponding to three to eight antenna ports, one scrambling ID.

According to the present invention described above, it is possible to increase the maximum number of terminals that can be supported in the MIMO environment of the wireless communication system.

1 shows an example of a communication system to which embodiments of the present invention are applied.

2 shows an example of a resource to which downlink DM-RSs are mapped.

3 illustrates an example of a communication system having N maximum numbers of terminals that can be supported in MU-MIMO.

4 is a flowchart illustrating a DM-RS transmission method according to an embodiment of the present invention.

5 is a block diagram showing the configuration of a base station according to an embodiment of the present invention.

6 is a block diagram illustrating a configuration of a terminal according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Referring to FIG. 1, a wireless communication system includes a user equipment (UE) 10 and an uplink (for example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a PRACH). (Physical Random Access CHannel), SRS (Sounding Reference Signal, etc.) and downlink communication (e.g., Physical Downlink Shared CHannel (PDSCH), Physical Downlink Control CHannel (PDCCH), etc.) 20).

In the present specification, the terminal 10 is a comprehensive concept of a terminal in wireless communication. In addition, a user station (UE) in WCDMA, LTE, HSPA, etc., as well as a mobile station (MS) and user terminal (UT) in GSM It should be interpreted as a concept including a subscriber station (SS), a wireless device, and the like.

The base station 20 is generally a station for communicating with the terminal 10, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS. The term "transceiver system", "access point" or "relay node" may be referred to as other terms.

In addition, the base station 20 is meant to cover various coverage areas such as megacell, macrocell, microcell, picocell, femtocell, radio resource head (RRH) and relay node communication range.

In addition, the base station 20 may be referred to as a transmission point (TP) in terms of transmitting downlink communication to the terminal 10, and a reception point in view of receiving uplink communication from the terminal 10. , RP), or may be called a Point or a Transmission and Reception Point.

The base station 20 may perform downlink transmission to the terminal 10. The base station 20 may transmit a physical downlink shared channel (PDSCH) as a downlink data channel for unicast transmission. In addition, the base station 20 grants scheduling approval for transmission on downlink control information such as scheduling required for reception of the PDSCH or on an uplink data channel (for example, a physical uplink shared channel (PUSCH)). A physical downlink control channel (PDCCH) as a downlink control channel used for transmitting downlink control information (DCI) including information may be transmitted. The PDSCH and the PDCCH may be located in a data region and a control region separated by time (symbols) in one subframe. Meanwhile, the base station 20 may transmit an enhanced PDCCH (EPDCCH) as a downlink control channel located in a data area to transmit downlink control information. Hereinafter, the transmission and reception of signals through each channel will be described in the form of transmission and reception of the corresponding channel.

The base station 20 may transmit a UE-specific reference signal (UE-specific reference signal or DeModulation Reference Signal, DM-RS) in the downlink. DM-RS can be used for demodulation of PDSCH or EPDCCH. The antenna port p of the DM-RS related to the PDSCH may be p∈ {7,8,9,10,11,12,13,14}, and the antenna port p of the DM-RS related to the EPDCCH is p ∈ {107,108,109,110}.

The sequence r (m) of the DM-RS related to the PDSCH may be defined as in Equation 1 below.

[Equation 1]

In Equation 1

May be 110 as a maximum downlink bandwidth in RB units. The pseudo-random sequence c (i) may be initialized as in Equation 2 below.

[Equation 2]

In Equation 2, n _s may have a value of 0 to 19 as a slot number. n _SCID may have a value of 0 or 1 as a scrambling identity.

The value of

If the value of is not provided by a higher layer or if DCI format 1A is used as the DCI, then the cell ID (

), Otherwise

to be. According to Equations 1 and 2, the DM-RS may have pseudo orthogonality when the values of n _SCID are different from each other.

The symbol number l and the subcarrier number k of the resource element RE to which the sequence r (m) of the DM-RS related to the PDSCH is mapped may be determined as in Equation 3 below.

[Equation 3]

In equation (3)

Is a resource block size in the frequency domain expressed by the number of subcarriers, n _PRB is a physical resource block number, and n _s is a slot number.

2 is

= 12 That is, when the number of subcarriers in one PRB is 12, an example of a resource to which a DM-RS is mapped in a specific n _PRB is shown. Referring to FIG. 2, when the antenna port p is 7, 8, 11 or 13, the resource 210 to which the DM-RS is mapped and the DM-RS when the antenna port p is 9, 10, 12 or 14 Resource 220 to which is mapped may be seen that the k value is different from each other.

Meanwhile, the following Equations 4 and 5 may be used instead of Equations 2 and 3 for the DM-RS related to the EPDCCH.

[Equation 4]

[Equation 5]

Meanwhile, multiple input multiple output (MIMO) technology may be used to increase the capacity of wireless communication. MIMO technology is a single user MIMO (SU-MIMO) technology for allocating all antenna resources of a base station to one user (terminal) and MU-MIMO (Multi-MMO) for decomposing antenna resources or radio space resources of a base station to multiple users (terminals). User MIMO) technology.

In the current Long Term Evolution (LTE) system, up to eight antennas (antenna ports (p) 7 to 14) are possible, and n _SCID may have a value of 0 or 1. FIG.

In case of SU-MIMO, the base station may transmit DM-RS using 1 to 8 layers to the terminal, and in case of MU-MIMO, the base station transmits DM-RS to each terminal using 1 or 2 layers. Can be. In the case of one layer, one codeword may exist, and in the case of two or more layers, two codewords may exist.

In the case of MU-MIMO, the maximum number of terminals that can be supported is 4, and the maximum number of layers that can be supported may be 4. In this case, each terminal uses one or two layers. Table 1 shows the number of layers that can be supported for each terminal in this case.

TABLE 1

Referring to Table 1, when each terminal uses one layer in MU-MIMO, up to four terminals may be supported, so four cases as follows may be necessary.

1-1) 1 layer, port 7, n _SCID = 0

1-2) 1 layer, port 7, n _SCID = 1

1-3) 1 layer, port 8, n _SCID = 0

1-4) 1 layer, port 8, n _SCID = 1

In addition, referring to Table 1, when each terminal uses two layers in MU-MIMO, up to two terminals may be supported, and thus the following two cases may be necessary.

2-1) 2 layers, port 7 ~ 8, n _SCID = 0

2-2) 2 layers, port 7 ~ 8, n _SCID = 1

In addition, referring to Table 1, one terminal may use one to eight layers in SU-MIMO. The case where one terminal uses one or two layers overlaps with the case where the terminal uses one or two layers in the above-described MU-MIMO (1-1, 2-1). A case where one terminal uses three to eight layers may be as follows.

3-1) 3 layers, port 7 ~ 9

3-2) 4 layers, port 7 ~ 10

3-3) 5 layers, port 7 ~ 11

3-4) 6 layers, port 7 ~ 12

3-5) 7 layers, port 7 ~ 13

3-6) 8 layers, port 7 ~ 14

Meanwhile, when downlink transmission is performed for two codewords and the terminal does not receive one codeword, the base station may retransmit one codeword that the terminal did not receive. One codeword to be retransmitted may use 1 to 4 layers. In this case, the case where one codeword uses one layer is duplicated when the terminal uses one layer in MU-MIMO (1-1). A case where one terminal uses two to four layers for one codeword may be as follows.

4-1) 2 layers, port 7 ~ 8

4-2) 3 layers, port 7 ~ 9

4-3) 4 layers, port 7 ~ 10

In consideration of all the above-described case, it may be as shown in Table 2 below. In Table 2, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

TABLE 2

Table 2 is promised between the base station and the terminal, and information of 3 bits indicating the number of layers of the DM-RS, the antenna port, and the scrambling ID transmitted by the base station may be signaled through downlink control information such as DCI. Such 3-bit information may be included in DCI format 2C in TM (Transmission Mode) 9 in case of LTE Rel-10 or transmitted in DCI format 2D in TM 10 in case of LTE Rel-11.

On the other hand, in the above-described example, the maximum total number of used layers in the MU-MIMO is four, the maximum total number of possible terminals is four, each terminal uses one or two layers. In the case of MU-MIMO, only some of the resources available are used. That is, in the LTE system using up to 8 antennas, if both 0 and 1 are possible as n _SCID values for each antenna port, in theory, up to 16 layers may be supported. However, the above example may support up to 4 layers in MU-MIMO. Supports three layers.

Referring to FIG. 3, terminals 310-1 to 310 -N that can be supported by MU-MIMO, that is, terminals 310-1 to 310 -N that the base station 320 can simultaneously transmit downlink DM-RS, may be used. ) Is the maximum number of N (N> 4), where the maximum number of layers is N. Through this, the communication system can support MU-MIMO between more terminals. In the present specification, in the case of MU-MIMO, the number of layers supported for each terminal may be one or two.

<최대 가능한 단말 8, 최대 가능한 전체 레이어의 개수 8><Maximum possible terminal 8, maximum possible total number of layers 8>

In one example, the maximum possible number of terminals in the MU-MIMO environment is eight, the maximum possible total number of layers may be eight. Table 3 shows the number of layers that can be supported for each terminal in this case.

TABLE 3

Referring to Table 3, when each terminal uses one layer in MU-MIMO, eight cases may be necessary because up to eight layers may be supported. For the eight cases, four may be added in addition to the four according to Table 2. To this end, n _SCID = 0 or 1 can be used in port 9 and port 10 as shown in 1-5 to 1-8 below.

1-1) 1 layer, port 7, n _SCID = 0

1-2) 1 layer, port 7, n _SCID = 1

1-3) 1 layer, port 8, n _SCID = 0

1-4) 1 layer, port 8, n _SCID = 1

1-5) 1 layer, port 9, n _SCID = 0

1-6) 1 layer, port 9, n _SCID = 1

1-7) 1 layer, port 10, n _SCID = 0

1-8) 1 layer, port 10, n _SCID = 1

In addition, referring to Table 3, if each terminal uses two layers in MU-MIMO, four cases may be necessary since up to eight layers may be supported. For the four cases, two may be added in addition to the two according to Table 2. To this end, n _SCID = 0 or 1 can be used in ports 9 to 10 as shown in 2-3 to 2-4 below.

2-1) 2 layers, port 7 ~ 8, n _SCID = 0

2-2) 2 layers, port 7 ~ 8, n _SCID = 1

2-3) 2 layers, port 9 ~ 10, n _SCID = 0

2-4) 2 layers, port 9 ~ 10, n _SCID = 1

In addition, referring to Table 3, one terminal may use one to eight layers in SU-MIMO. The case where one terminal uses one or two layers is duplicated when the terminal uses one or two layers 1-1 and 2-1 in MU-MIMO. A case where one terminal uses three to eight layers may be as follows.

3-1) 3 layers, port 7 ~ 9

3-2) 4 layers, port 7 ~ 10

3-3) 5 layers, port 7 ~ 11

3-4) 6 layers, port 7 ~ 12

3-5) 7 layers, port 7 ~ 13

3-6) 8 layers, port 7 ~ 14

4-1) 2 layers, port 7 ~ 8

4-2) 3 layers, port 7 ~ 9

4-3) 4 layers, port 7 ~ 10

Considering all the above cases, a table may be configured as shown in Table 4 below. In Table 4, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

TABLE 4

Alternatively, the table may be configured as shown in Table 5 or Table 6 in consideration of backward compatibility with Table 2 described above.

TABLE 5

TABLE 6

In Tables 4 to 6, the value n _scID of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

Any one of Tables 4 to 6 is promised between the base station and the terminal, and 4-bit information indicating the number of layers of the DM-RS, the antenna port, and the scrambling ID transmitted by the base station indicates downlink control information such as DCI. May be signaled through.

In the above example, compared with Table 2, the case in which n _SCID = 0 or 1 is used in port 9 and port 10 for the case where each terminal uses one layer in MU-MIMO. However, as another example, a case in which n _SCID = 0 is used in port 9, port 10, port 11, and port 12 may be added.

In addition, a case in which n _SCID = 0 or 1 is used in ports 9 to 10 for the case where each UE uses two layers in MU-MIMO is added. However, as another example, a case in which n _SCID = 0 is used in ports 9 to 10 and ports 11 to 12 may be added.

<최대 가능한 단말 10, 최대 가능한 전체 레이어의 개수 10><Maximum possible terminal 10, maximum possible total number of layers 10>

In one example, the maximum possible number of terminals in the MU-MIMO environment is 10, the maximum possible total number of layers may be 10. Table 7 shows the number of layers that can be supported for each terminal in this case.

TABLE 7

Referring to Table 7, when each terminal uses one layer in MU-MIMO, up to 10 layers may be supported, so 10 cases may be necessary. For the ten cases, six may be added in addition to the four according to Table 2. To this end, n _SCID = 0 may be used in ports 9 to 14 as shown in 1-5 to 1-10 below.

1-1) 1 layer, port 7, n _SCID = 0

1-2) 1 layer, port 7, n _SCID = 1

1-3) 1 layer, port 8, n _SCID = 0

1-4) 1 layer, port 8, n _SCID = 1

1-5) l layer, port 9

1-6) l layer, port 10

1-7) l layer, port 11

1-8) l layer, port 12

1-9) l layer, port 13

1-10) l layer, port 14

In addition, referring to Table 7, when each terminal uses two layers in MU-MIMO, five cases may be necessary because up to 10 layers may be supported. For the five cases, three more may be added in addition to the two according to Table 2. To this end, n _SCID = 0 may be used in ports 9 to 10, port 11, 13, and port 12, 14 as shown in 2-3 to 2-5 below. As described above with reference to FIG. 2, since ports 11 and 13 use the same resource and ports 12 and 14 use the same resource, port 11 and 13 may be bundled and port 12 and 14 may be bundled for two layers.

2-1) 2 layers, port 7 ~ 8, n _SCID = 0

2-2) 2 layers, port 7 ~ 8, n _SCID = 1

2-3) 2 layers, port 9 ~ 10

2-4) 2 layers, port 11,13

2-5) 2 layers, port 12,14

In addition, referring to Table 7, one terminal may use one to eight layers in SU-MIMO. The case where one terminal uses one or two layers overlaps with the case where the terminal uses one or two layers in the above-described MU-MIMO (1-1, 2-1). A case where one terminal uses three to eight layers may be as follows.

3-1) 3 layers, port 7 ~ 9

3-2) 4 layers, port 7 ~ 10

3-3) 5 layers, port 7 ~ 11

3-4) 6 layers, port 7 ~ 12

3-5) 7 layers, port 7 ~ 13

3-6) 8 layers, port 7 ~ 14

4-1) 2 layers, port 7 ~ 8

4-2) 3 layers, port 7 ~ 9

4-3) 4 layers, port 7 ~ 10

Considering all the above cases, the table may be configured as shown in Table 8 below. In Table 8, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

TABLE 8

Alternatively, the table may be configured as shown in Table 9 or Table 10 in consideration of backward compatibility with Table 2 described above.

TABLE 9

TABLE 10

In Tables 8 to 10, the value of the scrambling ID (n _SCID ) when the value of the scrambling ID is not separately indicated is 0.

Any one of Tables 8 to 10 is promised between the base station and the terminal, and 4-bit information indicating the number of layers of the DM-RS, the antenna port, and the scrambling ID transmitted by the base station indicates downlink control information such as DCI. May be signaled through.

In the above example, compared with Table 2, the case in which n _SCID = 0 is used in ports 9 to 14 for each UE using one layer in MU-MIMO. However, as another example, port can also be an additional nine in the case of using the n _SCID = 0 or 1 in the port 10 with port 11 and port 12 (or port 11 and port 13) When using the n _SCID = 0 in Do. Alternatively, the case of using n _SCID = 0 or 1 in ports 9 to 11 may be added. Alternatively, the case where n _SCID = 0 or 1 is used in port 9 and the case where n _SCID = 0 is used in ports 10 to 13 may be added.

In addition, a case in which n _SCID = 0 is used in ports 9 to 10, ports 11 and 13, and ports 12 and 14 for each UE using two layers in MU-MIMO is added. However, as another example, the use of n _SCID = 0 or 1 in ports 9 to 10 and the use of n _SCID = 0 in ports 11 and 13 may be added.

<최대 가능한 단말 12, 최대 가능한 전체 레이어의 개수 12><Maximum possible terminal 12, maximum possible total number of layers 12>

In one example, the maximum possible number of terminals in the MU-MIMO environment is 12, the maximum possible total number of layers may be 12. Table 11 shows the number of layers that can be supported for each terminal in this case.

TABLE 11

Referring to Table 11, when each terminal uses one layer in MU-MIMO, 12 cases may be necessary because up to 12 layers may be supported. For the 12 cases, in addition to four according to Table 2, eight may be added. To do this, you can use the _SCID n = 0 in the port 9 and _SCID n = 0 or 1, and port 11 to 14 in the port 10, such as 1-5 to 1-12 below.

1-1) 1 layer, port 7, n _SCID = 0

1-2) 1 layer, port 7, n _SCID = 1

1-3) 1 layer, port 8, n _SCID = 0

1-4) 1 layer, port 8, n _SCID = 1

1-5) 1 layer, port 9, n _SCID = 0

1-6) 1 layer, port 9, n _SCID = 1

1-7) 1 layer, port 10, n _SCID = 0

1-8) 1 layer, port 10, n _SCID = 1

1-9) 1 layer, port 11

1-10) 1 layer, port 12

1-11) 1 layer, port 13

1-12) 1 layer, port 14

In addition, referring to Table 11, when each terminal uses two layers in MU-MIMO, six cases may be necessary because up to 12 layers may be supported. For the six cases, four may be added in addition to the two according to Table 2. To do this, you can use the _SCID n = 0 in _SCID n = 0 or 1, and the port 11,13 and 12,14 in the port port 9 ~ 10 as shown in 2-3 to 2-6 below.

2-1) 2 layers, port 7 ~ 8, n _SCID = 0

2-2) 2 layers, port 7 ~ 8, n _SCID = 1

2-3) 2 layers, port 9 ~ 10, n _SCID = 0

2-4) 2 layers, port 9 ~ 10, n _SCID = 1

2-5) 2 layers, port 11,13

2-6) 2 layers, port 12,14

In addition, referring to Table 11, one terminal may use one to eight layers in SU-MIMO. The case where one terminal uses one or two layers overlaps with the case where the terminal uses one or two layers in the above-described MU-MIMO (1-1, 2-1). A case where one terminal uses three to eight layers may be as follows. As described above with reference to FIG. 2, since ports 11 and 13 use the same resource and ports 12 and 14 use the same resource, port 11 and 13 may be bundled and port 12 and 14 may be bundled for two layers.

3-1) 3 layers, port 7 ~ 9

3-2) 4 layers, port 7 ~ 10

3-3) 5 layers, port 7 ~ 11

3-4) 6 layers, port 7 ~ 12

3-5) 7 layers, port 7 ~ 13

3-6) 8 layers, port 7 ~ 14

4-1) 2 layers, port 7 ~ 8

4-2) 3 layers, port 7 ~ 9

4-3) 4 layers, port 7 ~ 10

Considering all the above cases, a table may be configured as shown in Table 12 below. In Table 12, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

TABLE 12

Alternatively, a table may be configured as shown in Table 13 or Table 14 in consideration of backward compatibility with Table 2 described above.

TABLE 13

TABLE 14

In Tables 12 to 14, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

Any one of Tables 12 to 14 is promised between the base station and the terminal, and 4-bit information indicating the number of layers of the DM-RS, the antenna port, and the scrambling ID transmitted by the base station indicates downlink control information such as DCI. May be signaled through.

In the above example, compared with Table 2, when n UE using port n and port 10 in _SC 9 or port 10 and n in ports 11 to 14 for the case where each UE uses one layer in MU-MIMO Added the use of _SCID = 0. However, as another example, the use of n _SCID = 0 or 1 in port 9, port 10, port 11, and port 13 may be added.

Further, using the _SCID n = 0 in the MU-MIMO in the case that respective nodes use the _SCID n = 0 or 1 in the port 9 ~ 10 for the case of using two layers and the port 11,13, 12,14 port A case was added. However, as another example, the use of n _SCID = 0 or 1 in ports 9 to 10 and ports 11 and 13 may be added.

<최대 가능한 단말 16, 최대 가능한 전체 레이어의 개수 16><Maximum possible number of terminals 16, maximum number of total possible layers 16>

In one example, the maximum possible number of terminals in the MU-MIMO environment is 16, the maximum possible total number of layers may be 16. Table 15 shows the number of layers that can be supported for each terminal in this case.

TABLE 15

Referring to Table 15, when each terminal uses one layer in MU-MIMO, 16 cases may be necessary because up to 16 layers may be supported. For the 16 cases, 12 may be added in addition to the four according to Table 2. To this end, n _SCID = 0 or 1 can be used in ports 9 to 14 as shown in 1-5 to 1-16 below.

1-1) 1 layer, port 7, n _SCID = 0

1-2) 1 layer, port 7, n _SCID = 1

1-3) 1 layer, port 8, n _SCID = 0

1-4) 1 layer, port 8, n _SCID = 1

1-5) 1 layer, port 9, n _SCID = 0

1-6) 1 layer, port 9, n _SCID = 1

1-7) 1 layer, port 10, n _SCID = 0

1-8) 1 layer, port 10, n _SCID = 1

1-9) 1 layer, port 11, n _SCID = 0

1-10) 1 layer, port 11, n _SCID = 1

1-11) 1 layer, port 12, n _SCID = 0

1-12) 1 layer, port 12, n _SCID = 1

1-13) 1 layer, port 13, n _SCID = 0

1-14) 1 layer, port 13, n _SCID = 1

1-15) 1 layer, port 14, n _SCID = 0

1-16) 1 layer, port 14, n _SCID = 1

In addition, referring to Table 15, when each terminal uses two layers in MU-MIMO, eight cases may be necessary because up to 16 layers may be supported. For the eight cases, six may be added in addition to the two according to Table 2. To this end, n _SCID = 0 or 1 can be used in ports 9 to 10, port 11, 13, and port 12, 14 as shown in 2-3 to 2-8 below. As described above with reference to FIG. 2, since ports 11 and 13 use the same resource and ports 12 and 14 use the same resource, port 11 and 13 may be bundled and port 12 and 14 may be bundled for two layers.

2-1) 2 layers, port 7 ~ 8, n _SCID = 0

2-2) 2 layers, port 7 ~ 8, n _SCID = 1

2-3) 2 layers, port 9 ~ 10, n _SCID = 0

2-4) 2 layers, port 9 ~ 10, n _SCID = 1

2-5) 2 layers, port 11,13, n _SCID = 0

2-6) 2 layers, port 11,13, n _SCID = 1

2-7) 2 layers, port 12,14, n _SCID = 0

2-8) 2 layers, port 12,14, n _SCID = 1

In addition, referring to Table 15, one terminal may use one to eight layers in SU-MIMO. The case where one terminal uses one or two layers overlaps with the case where the terminal uses one or two layers in the above-described MU-MIMO (1-1, 2-1). A case where one terminal uses three to eight layers may be as follows.

3-1) 3 layers, port 7 ~ 9

3-2) 4 layers, port 7 ~ 10

3-3) 5 layers, port 7 ~ 11

3-4) 6 layers, port 7 ~ 12

3-5) 7 layers, port 7 ~ 13

3-6) 8 layers, port 7 ~ 14

4-1) 2 layers, port 7 ~ 8

4-2) 3 layers, port 7 ~ 9

4-3) 4 layers, port 7 ~ 10

Considering all the above cases, a table may be configured as shown in Table 16 below. In Table 16, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

TABLE 16

Alternatively, a table may be configured as shown in Table 17 or Table 18 in consideration of backward compatibility with Table 2 described above.

TABLE 17

TABLE 18

In Tables 16 to 18, the value (n _SCID ) of the scrambling ID is 0 when the value of the scrambling ID is not separately indicated.

Any one of Tables 16 to 18 is promised between the base station and the terminal, and the 5-bit information indicating the number of layers of the DM-RS, the antenna port, and the scrambling ID transmitted by the base station indicates downlink control information such as DCI. May be signaled through.

Referring to FIG. 4, the base station and the terminal have a table including information on the number of layers, antenna ports, and scrambling IDs used when transmitting a DM-RS related to a PDSCH (S400).

In the case of one codeword, the table includes one layer number, one antenna port, N fields indicating one scrambling ID, and retransmission for N (N> 4) terminals using one layer. 2 to 4 layers, 2 to 4 antenna ports corresponding to one case, and three fields indicating one scrambling ID may be included.

In the case of two codewords, the table includes two layers, two antenna ports, one N / 2 field indicating one scrambling ID, and one for N / 2 terminals using two layers. The terminal may include three to eight layers, three to eight antenna ports corresponding thereto, and six fields indicating one scrambling ID for using three to eight layers. .

In the MU-MIMO environment, the maximum possible number of terminals is 8 and the maximum possible total number of layers is 8, the table may be any one of Tables 4 to 6 described above. The table includes (1) one layer, antenna ports 7 to 10, eight fields indicating

scrambling ID

0 or 1, and two to four layers, antenna ports 7 to 8, 7 for one codeword. And three fields indicating scrambling ID 0 to 9 or 7 to 10, and (2) two layers, antenna ports 7 to 8 or 9 to 10, and scrambling

ID

0 or 1 for two codewords. 4 fields indicating 6 fields indicating 3 to 8 layers, antenna ports 7 to 9, 7 to 10, 7 to 11, 7 to 12, 7 to 13 or 7 to 14, and scrambling ID 0. It may include.

In the MU-MIMO environment, the maximum possible number of terminals is 10 and the maximum possible total number of layers is 10. The table may be any one of Tables 8 to 10 described above. The table includes (1) one layer, antenna port 7 or 8, four fields indicating

scrambling ID

0 or 1, one layer, antenna ports 9 to 14, and a scrambling ID 0 for one codeword. 6 fields indicating 2 and 4 fields indicating 2 to 4 layers, antenna ports 7 to 8, 7 to 9 or 7 to 10, and scrambling ID 0, and (2) two codewords. For two layers, two fields indicating antenna ports 7 to 8, scrambling

ID

0 or 1, two layers, two layers indicating antenna ports 9 to 10, 11, 13 or 12, 14, scrambling ID 0 Field, and three to eight layers, and six fields indicating antenna ports 7 to 9, 7 to 10, 7 to 11, 7 to 12, 7 to 13, or 7 to 14, scrambling ID 0. .

In the MU-MIMO environment, the maximum possible number of terminals is 12 and the maximum possible total number of layers is 12, the table may be any one of Tables 12 to 14 described above. The table indicates (1) for one codeword, one layer, antenna ports 7 to 10, eight fields indicating

scrambling ID

0 or 1, one layer, antenna ports 11 to 14, and scrambling ID 0. Four fields, and two to four layers, three fields indicating antenna ports 7 to 8, 7 to 9 or 7 to 10, and scrambling ID 0, and (2) for two codewords, Two layers, antenna ports 7-8 or 9-10, four fields indicating

scrambling ID

0 or 1, two layers, two fields indicating antenna ports 11,13 or 12,14, scrambling ID 0, And 6 fields indicating 3 to 8 layers, antenna ports 7 to 9, 7 to 10, 7 to 11, 7 to 12, 7 to 13 or 7 to 14, and a scrambling ID 0.

In the MU-MIMO environment, when the maximum number of terminals is 16 and the maximum number of total layers is 16, the table may be any one of Tables 16 to 18 described above. The table includes (1) one field, 16 fields indicating antenna ports 7 to 14, scrambling 0 or 1, and 2 to 4 layers, antenna ports 7 to 8, 7 to 1 codeword. 9 or 7 to 10, including three fields indicating scrambling ID 0, and (2) for two codewords, two layers, antenna ports 7 to 8, 9 to 10, 11, 13 or 12, 14 , 8 fields indicating

scrambling ID

0 or 1, and 3 to 8 layers, antenna ports 7 to 9, 7 to 10, 7 to 11, 7 to 12, 7 to 13 or 7 to 14, scrambling ID 0 It may include six fields indicating.

Referring back to FIG. 4, the base station transmits the 4 or 5 bit information for specifying the number of layers, the antenna port, and the scrambling ID to the terminal by using the above table in the control information such as DCI (S410). In the MU-MIMO environment, when the maximum number of terminals is 8, 10, or 12, information for specifying the number of layers, antenna ports, and scrambling IDs may be 4 bits, and when the maximum number of terminals is 16, Information for specifying the number, antenna port, and scrambling ID may be 5 bits.

The base station transmits the DM-RS related to the PDSCH to the terminal (S420). The terminal demodulates the DM-RS related to the PDSCH using the number of layers, the antenna port, and the scrambling ID specified using the table provided in advance and the 4 or 5 bit information transmitted in step S410. The received DM-RS can be used to demodulate the PDSCH.

Referring to FIG. 5, the base station 500 may include a table storage unit 510, a control information transmitter 520, and a DM-RS transmitter 530.

The table storage unit 510 stores a table including information on the number of layers, antenna ports, and scrambling IDs used by the base station and the terminal to transmit the DM-RS associated with the PDSCH.

In the case of one codeword, the table includes one field number, one antenna port, N fields indicating one scrambling ID, for N (N> 4) terminals using one layer, and Two to four layers, two to four antenna ports corresponding to the retransmission case may include three fields indicating one scrambling ID.

In the case of two codewords, the table includes two layers, two antenna ports, one N / 2 field indicating one scrambling ID, and two layers for N / 2 terminals using two layers, and 3 to 8 layers, 3 to 8 antenna ports corresponding to the case where one terminal uses 3 to 8 layers, and 6 fields indicating one scrambling ID may be included. have.

The control information transmitter 520 transmits 4 or 5 bits of information for specifying the number of layers, the antenna port, and the scrambling ID in the control information, such as DCI, to the terminal using the above-described table. In the MU-MIMO environment, when the maximum number of terminals is 8, 10, or 12, information for specifying the number of layers, antenna ports, and scrambling IDs may be 4 bits, and when the maximum number of terminals is 16, Information for specifying the number, antenna port, and scrambling ID may be 5 bits.

The DM-RS transmitter 530 generates a DM-RS and transmits it to the terminal.

Referring to FIG. 6, the terminal 600 includes a table storage unit 610, a control information receiver 620, and a DM-RS receiver 630.

The table storage unit 610 stores a table including information on the number of layers, antenna ports, and scrambling IDs used when the base station and the terminal transmit a DM-RS related to the PDSCH.

The control information receiver 620 receives control information such as DCI including 4 or 5 bit information for specifying the number of layers, the antenna port, and the scrambling ID using the above-described table. In the MU-MIMO environment, when the maximum number of terminals is 8, 10, or 12, information for specifying the number of layers, antenna ports, and scrambling IDs may be 4 bits, and when the maximum number of terminals is 16, Information for specifying the number, antenna port, and scrambling ID may be 5 bits.

The DM-RS receiver 630 specifies the number of layers, antenna ports, and scrambling IDs using 4 or 5 bit information for specifying the number of layers, antenna ports, and scrambling IDs in the above-described table and table. The demodulation of the DM-RS related to the PDSCH is performed using the number of layers, the antenna port, and the scrambling ID.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

CROSS-REFERENCE TO RELATED APPLICATIONCROSS-REFERENCE TO RELATED APPLICATION

This patent application claims priority under Patent Application No. 10-2012-0148497, filed in South Korea on December 18, 2012, pursuant to Article 119 (a) (35 USC § 119 (a)). All content is incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims

A method for signaling downlink reference signal configuration information to a user equipment by a base station in a multi user-multiple input multiple output (MU-MIMO) environment,

And transmitting 4 or 5 bits of control information for specifying the antenna port, the scrambling ID, and the number of layers in the table to be used when transmitting the downlink reference signal to the terminal.

The table is,

For one codeword, one of the number of layers, one antenna port, N (N> 4) fields indicating one scrambling ID, and one of two to four layers, and two to Includes three fields indicating four antenna ports,

For two codewords, two layers number, two antenna ports, N / 2 fields indicating one scrambling ID, and one of three to eight layers, and three to eight corresponding ones Antenna ports, including six fields indicating one scrambling ID

A signaling method of downlink reference signal configuration information characterized by the above.
The method of claim 1,

When N is 8,

The table is,

For one codeword, one layer, one of antenna ports 7 to 10, eight fields indicating scrambling ID 0 or 1, two layers, fields indicating antenna ports 7 to 8, scrambling ID 0, 3 A field indicating four layers, antenna ports 7 to 9, scrambling ID 0, and a field indicating four layers, antenna ports 7 to 10, scrambling ID 0,

For two codewords, two fields, four fields indicating antenna ports 7 to 8 or 9 to 10, scrambling ID 0 or 1, three layers, fields indicating antenna ports 7 to 9, scrambling ID 0 , 4 layers, antenna ports 7 to 10, field indicating scrambling ID 0, 5 layers, antenna ports 7 to 11, field indicating scrambling ID 0, 6 layers, antenna ports 7 to 12, scrambling ID 0 A field indicating 7 layers, antenna ports 7 to 13, a field indicating scrambling ID 0, and a field indicating 8 layers, antenna ports 7 to 14, scrambling ID 0

A signaling method of downlink reference signal configuration information characterized by the above.
The method of claim 1,

When N is 10

The table is,

For one codeword, one layer, four fields indicating antenna port 7 or 8, scrambling ID 0 or 1, one layer, one of antenna ports 9 to 14, six fields indicating scrambling ID 0 , Two layers, antenna ports 7 to 8, field indicating scrambling ID 0, three layers, antenna ports 7 to 9, field indicating scrambling ID 0, and four layers, antenna ports 7 to 10, scrambling ID Contains a field indicating 0

For two codewords, two fields indicating two layers, antenna ports 7 to 8, scrambling ID 0 or 1, two layers, antenna ports 9 to 10, 11 and 13, or 12 and 14, scrambling ID 3 fields indicating 0, 3 layers, antenna ports 7 to 9, scrambling ID 0 fields, 4 layers, antenna ports 7 to 10, scrambling ID 0 fields, 5 layers, antenna ports 7 to 11, fields indicating scrambling ID 0, six layers, antenna ports 7 to 12, fields indicating scrambling ID 0, seven layers, fields indicating antenna ports 7 to 13, scrambling ID 0, and 8 Layers, antenna ports 7 to 14, including a field indicating scrambling ID 0

A signaling method of downlink reference signal configuration information characterized by the above.
The method of claim 1,

When N is 12,

The table is,

For one codeword, one layer, one of antenna ports 7 to 10, eight fields indicating scrambling ID 0 or 1, one layer, one of antenna ports 11 to 14, 4 indicating scrambling ID 0 Fields, two layers, antenna ports 7 to 8, fields indicating scrambling ID 0, three layers, antenna ports 7 to 9, fields indicating scrambling ID 0, and four layers, antenna ports 7 to 10, A field indicating scrambling ID 0,

For two codewords, two layers, antenna ports 7 to 8, or 9 to 10, four fields indicating scrambling ID 0 or 1, two layers, antenna ports 11 and 13, or 12 and 14, scrambling Two fields indicating ID 0, three layers, antenna ports 7 to 9, scrambling fields indicating ID 0, four layers, antenna ports 7 to 10, scrambling fields indicating ID 0, five layers, antennas Fields indicating ports 7 to 11, scrambling ID 0, six layers, antenna ports 7 to 12, fields indicating scrambling ID 0, seven layers, fields indicating antenna ports 7 to 13, scrambling ID 0, and 8 layers, antenna ports 7 to 14, including a field indicating the scrambling ID 0

A signaling method of downlink reference signal configuration information characterized by the above.
The method of claim 1,

When N is 16,

The table is,

For one codeword, one layer, one of antenna ports 7 to 14, 16 fields indicating scrambling ID 0 or 1, two layers, fields indicating antenna ports 7 to 8, scrambling ID 0, 3 A field indicating four layers, antenna ports 7 to 9, scrambling ID 0, and a field indicating four layers, antenna ports 7 to 10, scrambling ID 0,

For two codewords, two layers, antenna ports 7 to 8, 9 to 10, 11 and 13, or 12 and 14, eight fields indicating scrambling ID 0 or 1, three layers, antenna ports 7 to 9, field indicating scrambling ID 0, four layers, antenna ports 7 to 10, field indicating scrambling ID 0, five layers, antenna ports 7 to 11, field indicating scrambling ID 0, six layers, Fields indicating the antenna ports 7 to 12, scrambling ID 0, seven layers, fields indicating the antenna ports 7 to 13, the scrambling ID 0, and fields indicating the eight layers, antenna ports 7 to 14, the scrambling ID 0 To include

A signaling method of downlink reference signal configuration information characterized by the above.
A method for receiving a downlink reference signal by a terminal in a multi user-multiple input multiple output (MU-MIMO) environment,

Receiving 4 or 5 bits of control information from a base station for specifying in the table an antenna port, a scrambling ID, and the number of layers used for transmitting the downlink reference signal; And

Demodulating the downlink reference signal using the antenna port, the scrambling ID, and the number of layers of information specified based on the control information;

The table is,

For one codeword, one of the number of layers, one antenna port, N (N> 4) fields indicating one scrambling ID, and one of two to four layers, and two to Includes three fields indicating four antenna ports,

For two codewords, two layers number, two antenna ports, N / 2 fields indicating one scrambling ID, and one of three to eight layers, and three to eight corresponding ones Antenna ports, including six fields indicating one scrambling ID

Downlink reference signal receiving method characterized in that.
The method of claim 6,

If N is 8,

The table is,

For one codeword, one layer, one of antenna ports 7 to 10, eight fields indicating scrambling ID 0 or 1, two layers, fields indicating antenna ports 7 to 8, scrambling ID 0, 3 A field indicating four layers, antenna ports 7 to 9, scrambling ID 0, and a field indicating four layers, antenna ports 7 to 10, scrambling ID 0,

For two codewords, two fields, four fields indicating antenna ports 7 to 8 or 9 to 10, scrambling ID 0 or 1, three layers, fields indicating antenna ports 7 to 9, scrambling ID 0 , 4 layers, antenna ports 7 to 10, field indicating scrambling ID 0, 5 layers, antenna ports 7 to 11, field indicating scrambling ID 0, 6 layers, antenna ports 7 to 12, scrambling ID 0 A field indicating 7 layers, antenna ports 7 to 13, a field indicating scrambling ID 0, and a field indicating 8 layers, antenna ports 7 to 14, scrambling ID 0

Downlink reference signal receiving method characterized in that.
The method of claim 6,

When N is 10,

The table is,

For one codeword, one layer, four fields indicating antenna port 7 or 8, scrambling ID 0 or 1, one layer, one of antenna ports 9 to 14, six fields indicating scrambling ID 0 , Two layers, antenna ports 7 to 8, field indicating scrambling ID 0, three layers, antenna ports 7 to 9, field indicating scrambling ID 0, and four layers, antenna ports 7 to 10, scrambling ID Contains a field indicating 0

For two codewords, two fields indicating two layers, antenna ports 7 to 8, scrambling ID 0 or 1, two layers, antenna ports 9 to 10, 11 and 13, or 12 and 14, scrambling ID 3 fields indicating 0, 3 layers, antenna ports 7 to 9, scrambling ID 0 fields, 4 layers, antenna ports 7 to 10, scrambling ID 0 fields, 5 layers, antenna ports 7 to 11, fields indicating scrambling ID 0, six layers, antenna ports 7 to 12, fields indicating scrambling ID 0, seven layers, fields indicating antenna ports 7 to 13, scrambling ID 0, and 8 Layers, antenna ports 7 to 14, including a field indicating scrambling ID 0

Downlink reference signal receiving method characterized in that.
The method of claim 6,

When N is 12,

The table is,

For one codeword, one layer, one of antenna ports 7 to 10, eight fields indicating scrambling ID 0 or 1, one layer, one of antenna ports 11 to 14, 4 indicating scrambling ID 0 Fields, two layers, antenna ports 7 to 8, fields indicating scrambling ID 0, three layers, antenna ports 7 to 9, fields indicating scrambling ID 0, and four layers, antenna ports 7 to 10, A field indicating scrambling ID 0,

For two codewords, two layers, antenna ports 7 to 8, or 9 to 10, four fields indicating scrambling ID 0 or 1, two layers, antenna ports 11 and 13, or 12 and 14, scrambling Two fields indicating ID 0, three layers, antenna ports 7 to 9, scrambling fields indicating ID 0, four layers, antenna ports 7 to 10, scrambling fields indicating ID 0, five layers, antennas Fields indicating ports 7 to 11, scrambling ID 0, six layers, antenna ports 7 to 12, fields indicating scrambling ID 0, seven layers, fields indicating antenna ports 7 to 13, scrambling ID 0, and 8 layers, antenna ports 7 to 14, including a field indicating the scrambling ID 0

Downlink reference signal receiving method characterized in that.
The method of claim 6,

When N is 16,

The table is,

For one codeword, one layer, one of antenna ports 7 to 14, 16 fields indicating scrambling ID 0 or 1, two layers, fields indicating antenna ports 7 to 8, scrambling ID 0, 3 A field indicating four layers, antenna ports 7 to 9, scrambling ID 0, and a field indicating four layers, antenna ports 7 to 10, scrambling ID 0,

For two codewords, two layers, antenna ports 7 to 8, 9 to 10, 11 and 13, or 12 and 14, eight fields indicating scrambling ID 0 or 1, three layers, antenna ports 7 to 9, field indicating scrambling ID 0, four layers, antenna ports 7 to 10, field indicating scrambling ID 0, five layers, antenna ports 7 to 11, field indicating scrambling ID 0, six layers, Fields indicating the antenna ports 7 to 12, scrambling ID 0, seven layers, fields indicating the antenna ports 7 to 13, the scrambling ID 0, and fields indicating the eight layers, antenna ports 7 to 14, the scrambling ID 0 To include

Downlink reference signal receiving method characterized in that.
A terminal for receiving a downlink reference signal in a multi user-multiple input multiple output (MU-MIMO) environment,

A control information receiver configured to receive 4 or 5 bits of control information from the base station for specifying the antenna port, the scrambling ID, and the number of layers in the table used to transmit the downlink reference signal; And

A reference signal receiver configured to demodulate the downlink reference signal using the antenna port, the scrambling ID, and the number of layers specified based on the control information;

The table is,

For one codeword, one of the number of layers, one antenna port, N (N> 4) fields indicating one scrambling ID, and one of two to four layers, and two to Includes three fields indicating four antenna ports,

For two codewords, two layers number, two antenna ports, N / 2 fields indicating one scrambling ID, and one of three to eight layers, and three to eight corresponding ones Antenna ports, including six fields indicating one scrambling ID

Terminal characterized in that.
The method of claim 11,

When N is 8,

The table is,

For one codeword, one layer, one of antenna ports 7 to 10, eight fields indicating scrambling ID 0 or 1, two layers, fields indicating antenna ports 7 to 8, scrambling ID 0, 3 A field indicating four layers, antenna ports 7 to 9, scrambling ID 0, and a field indicating four layers, antenna ports 7 to 10, scrambling ID 0,

For two codewords, two fields, four fields indicating antenna ports 7 to 8 or 9 to 10, scrambling ID 0 or 1, three layers, fields indicating antenna ports 7 to 9, scrambling ID 0 , 4 layers, antenna ports 7 to 10, field indicating scrambling ID 0, 5 layers, antenna ports 7 to 11, field indicating scrambling ID 0, 6 layers, antenna ports 7 to 12, scrambling ID 0 A field indicating 7 layers, antenna ports 7 to 13, a field indicating scrambling ID 0, and a field indicating 8 layers, antenna ports 7 to 14, scrambling ID 0

Terminal characterized in that.
The method of claim 11,

When N is 10,

The table is,

For one codeword, one layer, four fields indicating antenna port 7 or 8, scrambling ID 0 or 1, one layer, one of antenna ports 9 to 14, six fields indicating scrambling ID 0 , Two layers, antenna ports 7 to 8, field indicating scrambling ID 0, three layers, antenna ports 7 to 9, field indicating scrambling ID 0, and four layers, antenna ports 7 to 10, scrambling ID Contains a field indicating 0

For two codewords, two fields indicating two layers, antenna ports 7 to 8, scrambling ID 0 or 1, two layers, antenna ports 9 to 10, 11 and 13, or 12 and 14, scrambling ID 3 fields indicating 0, 3 layers, antenna ports 7 to 9, scrambling ID 0 fields, 4 layers, antenna ports 7 to 10, scrambling ID 0 fields, 5 layers, antenna ports 7 to 11, fields indicating scrambling ID 0, six layers, antenna ports 7 to 12, fields indicating scrambling ID 0, seven layers, fields indicating antenna ports 7 to 13, scrambling ID 0, and 8 Layers, antenna ports 7 to 14, including a field indicating scrambling ID 0

Terminal characterized in that.
The method of claim 11,

When N is 12,

The table is,

For one codeword, one layer, one of antenna ports 7 to 10, eight fields indicating scrambling ID 0 or 1, one layer, one of antenna ports 11 to 14, 4 indicating scrambling ID 0 Fields, two layers, antenna ports 7 to 8, fields indicating scrambling ID 0, three layers, antenna ports 7 to 9, fields indicating scrambling ID 0, and four layers, antenna ports 7 to 10, A field indicating scrambling ID 0,

For two codewords, two layers, antenna ports 7 to 8, or 9 to 10, four fields indicating scrambling ID 0 or 1, two layers, antenna ports 11 and 13, or 12 and 14, scrambling Two fields indicating ID 0, three layers, antenna ports 7 to 9, scrambling fields indicating ID 0, four layers, antenna ports 7 to 10, scrambling fields indicating ID 0, five layers, antennas Fields indicating ports 7 to 11, scrambling ID 0, six layers, antenna ports 7 to 12, fields indicating scrambling ID 0, seven layers, fields indicating antenna ports 7 to 13, scrambling ID 0, and 8 layers, antenna ports 7 to 14, including a field indicating the scrambling ID 0

Terminal characterized in that.
The method of claim 11,

When N is 16,

The table is,

For one codeword, one layer, one of antenna ports 7 to 14, 16 fields indicating scrambling ID 0 or 1, two layers, fields indicating antenna ports 7 to 8, scrambling ID 0, 3 A field indicating four layers, antenna ports 7 to 9, scrambling ID 0, and a field indicating four layers, antenna ports 7 to 10, scrambling ID 0,

For two codewords, two layers, antenna ports 7 to 8, 9 to 10, 11 and 13, or 12 and 14, eight fields indicating scrambling ID 0 or 1, three layers, antenna ports 7 to 9, field indicating scrambling ID 0, four layers, antenna ports 7 to 10, field indicating scrambling ID 0, five layers, antenna ports 7 to 11, field indicating scrambling ID 0, six layers, Fields indicating the antenna ports 7 to 12, scrambling ID 0, seven layers, fields indicating the antenna ports 7 to 13, the scrambling ID 0, and fields indicating the eight layers, antenna ports 7 to 14, the scrambling ID 0 To include

Terminal characterized in that.