KR20090112534A - Generation Method of the Uplink Reference Signal Sequence - Google Patents

Abstract

PURPOSE: A method of generating an uplink reference signal sequence is provided to adjust a hopping pattern of a UL RS sequence to have the same hopping pattern about the entire cell ID, thereby integrally setting each hopping pattern by the same signaling information. CONSTITUTION: An uplink reference signal sequence generating method comprises the following steps. A basic sequence corresponding to selected sequence group index and a basic sequence index in a group is generated. Cycle shift is applied to the basic sequence to according to a cycle shift value. The basic sequence index and the cycle shift value are changed according to the first hopping pattern, the second hopping pattern and the third hopping pattern respectively in a time domain. At least one of the second hopping pattern and the third hopping pattern is set according to signaling information of determining the first hopping pattern.

Description

Generation method of the uplink reference signal sequence

The following description relates to a mobile communication system and specifically relates to a method for efficiently generating an uplink reference signal sequence.

In a mobile communication system, transmission of a reference signal is required for demodulation of a received signal and / or channel estimation. In detail, the uplink of the 3GPP LTE system will be described as an example.

In the 3GPP LTE system, demodulation of a physical uplink shared channel (hereinafter referred to as "PUSCH") and a physical uplink control channel (hereinafter referred to as "PUCCH") transmitted in uplink is performed. There is a demodulation reference signal for demodulating and a sounding reference signal independent of the PUSCH and the PUCCH. The same base sequence set may be used for both of them, and in the following description, both of them are referred to as "uplink reference signal (UL RS)" or "confusion reference signal" for convenience of explanation when there is no confusion. RS) ". The basic sequence for these RS can be defined as follows.

The above-described RS may be generated using the base sequence selected according to the sequence group index u and the base sequence index v in each group. In addition, the RS may be transmitted in a form in which circular shift is applied to the basic sequence.

와 같이 나타낼 경우, 생성되는 RS 시퀀스는 다음과 같이 나타낼 수 있다.For example, a circular motion α is applied to a base sequence having a group index u and a base sequence index v in the group.

When expressed as follows, the generated RS sequence may be represented as follows.

는 RS 시퀀스의 길이를 나타내며, RB(Resource Block) 길이 단위(

)의 배수, 즉

와 같이 나타낼 수 있다. 상기 수학식 1과 같은 관계에 따라 하나의 기본 시퀀스로부터 다양한 RS 시퀀스가 순환 이동값(α)에 따라 규정될 수 있다.here,

Represents the length of the RS sequence, and RB (Resource Block) length unit (

Multiple of), i.e.

Can be expressed as: According to the relation as in Equation 1, various RS sequences from one basic sequence may be defined according to the cyclic shift value α.

Meanwhile, in the 3GPP LTE system, 30 sequence groups are defined as the above-described sequence group (that is, 0 ≦ u ≦ 29), and when the RS sequence has a length of 1RB to 5RB, 1 in the group for each length RS sequence Two basic sequences (i.e., v = 0, 1) are defined for each RS sequence of each length if the RS sequence has a length of 6RB or more. In addition, the RS sequence uses a cyclically shifted version of the ZC sequence for a length of 3 RB or more, and uses a separate sequence predefined in a predetermined manner for a length of 3 RB or less.

Meanwhile, in generating the above-described RS sequence, the group index u and the base sequence index v in the group may change according to a predetermined hopping pattern in the time domain. In addition, the cyclic shift applied to RS sequence generation may also have a specific hopping pattern.

Such a (1) group index (u), (2) the basic sequence index (v) in the group and (3) the cyclic shift value (α) applied can be generated a specific hopping pattern for each cell based on the cell ID It is preferable. In addition, the following items are preferably supported along with additional signaling of the upper layer.

Specifically, in order to maximize the inter-randomization effect, it is preferable that a different hopping pattern may be applied for each cell having a different cell ID. In addition, a cell is used to support an eNode B-specific allocation for improving performance at a sector boundary by using the same sequence group among sectors within one base station (eNode B) and changing only a cyclic shift value. It is preferable that the same hopping pattern is applied to cells having different IDs.

However, a hopping pattern of a currently defined UL RS sequence may not have the same hopping pattern for all cell IDs. In addition, in some cases, an initial value of a sequence according to a hopping pattern may be set to 0 so that no sequence is generated. In addition, the group hopping pattern, the intra-group sequence hopping pattern, and the cyclic shift hopping pattern need to be defined independently of each other and collectively define them.

An embodiment of the present invention for solving the above problems is to provide a method for generating an RS sequence to adjust the hopping pattern of the UL RS sequence to have the same hopping pattern for the entire cell ID.

In addition, it is intended to provide a method in which each hopping pattern can be collectively set by the same signaling information.

In addition, the above-described RS sequence generation method to provide a method for setting the initial value of the sequence for determining the hopping pattern is not zero.

In an embodiment of the present invention for solving the above-described problems, in the method for generating an uplink reference signal sequence, a sequence group index (u) and a basic sequence index (v) within a group are selected to select selected indexes. Generating a base sequence corresponding to the base sequence; And applying a cyclic shift to the basic sequence according to the cyclic shift value α, wherein the sequence group index u, the basic sequence index v in the group, and the cyclic shift value α are The first hopping pattern, the second hopping pattern, and the third hopping pattern are respectively changed in the region, and at least one of the second hopping pattern and the third hopping pattern is set according to signaling information for determining the first hopping pattern. It provides a method of generating a reference signal sequence, characterized in that.

)을 결정하는 시그널링 정보일 수 있으며, 구체적으로 상기 시퀀스 시프트 패턴 (

)을 결정하는 시그널링 정보는 물리 상향링크 제어 채널(PUCCH)과 물리 상향링크 공유 채널(PUSCH)에 적용되는 시퀀스 시프트 값의 차이값(

) 정보일 수 있다.In this case, the signaling information for determining the first hopping pattern includes a sequence shift pattern for determining the sequence group index (u).

) May be signaling information for determining, and specifically, the sequence shift pattern (

Signaling information for determining the difference between the sequence shift value applied to the physical uplink control channel (PUCCH) and the physical uplink shared channel (PUSCH) (

Information).

In addition, when the first hopping is not applied to the base sequence index v in the group,

는 상기 시퀀스 그룹 인덱스(u) 결정을 위한 그룹 호핑 패턴을, 상기

는 상기 시퀀스 그룹 인덱스(u) 결정을 위한 시퀀스 시프트 패턴을 나타낸다.Can be determined according to the above

Is a group hopping pattern for determining the sequence group index (u),

Denotes a sequence shift pattern for determining the sequence group index u.

In addition, when the first hopping is not applied to the base sequence index v in the group,

은 및 상기

는 상기 시 퀀스 그룹 인덱스(u) 결정을 위한 그룹 호핑 패턴(

) 및 상기 시퀀스 그룹 인덱스(u) 결정을 위한 시퀀스 시프트 패턴(

)과 상이하게 설정될 수 있다.Can be determined according to the above

Silver and above

Is a group hopping pattern for determining the sequence group index (u)

) And a sequence shift pattern for determining the sequence group index (u)

) May be set differently.

Further, the cyclic shift value α is

에 의해 결정되며, 상기 n_cs는,

Is determined by, and n _cs is

에 의해 결정되며, 이때, 상기

는 12로, 상기

는 방송 정보에 의해,

는 상향링크 스케줄링 할당 정보에 의해 특정될 수 있다. 본 실시형태에서는 이 경우, 상기

가,

Determined by the above, wherein

Is above 12,

By the broadcast information,

May be specified by uplink scheduling allocation information. In this embodiment, in this case,

end,

에 의해 결정되도록 설정할 수 있으며, 이때 상기

및 상기

는 상기 시퀀스 그룹 인덱스(u) 결정을 위한 그룹 호핑 패턴(

) 및 상기 시퀀스 그룹 인덱스(u) 결정을 위한 시퀀스 시프트 패턴(

)과 상이하게 설정될 수도, 동일하게 설정될 수도 있다.

Can be set to be determined by

And said

Is a group hopping pattern for determining the sequence group index (u)

) And a sequence shift pattern for determining the sequence group index (u)

) May be set differently or may be set identically.

In addition, the initial values of the first to third hopping patterns may have an offset of a predetermined constant value (a) so as not to be zero, and preferably, the predetermined constant value may be 1.

On the other hand, in another embodiment of the present invention for solving the above problems, in the method for generating an uplink reference signal sequence, by selecting the sequence group index (u) and the in-group basic sequence index (v), Generating a base sequence corresponding to the selected indices; And applying a cyclic shift to the basic sequence according to the cyclic shift value α, wherein the sequence group index u, the basic sequence index v in the group, and the cyclic shift value α are The initial value of the sequence for determining the second hopping pattern is changed according to the first hopping pattern, the second hopping pattern, and the third hopping pattern, respectively. A method of generating an uplink reference signal sequence configured to have a number is provided.

에 따라 결정되며, 상기

은 미리 결정된 생성식에 의해 생성되는 골드 시퀀스로서,In this case, when the first hopping is not applied to the basic sequence index in the group,

Is determined according to the above

Is a gold sequence generated by a predetermined generation equation,

Have an initial value such as

It can have an initial value such as

는 셀 ID를,

는 물리 상향링크 공유 채널(PUSCH)의 시퀀스 그룹 인덱스(u)결정에 이용되는 시퀀스 쉬프트 값을 나타낸다.here,

Is the cell ID,

Denotes a sequence shift value used for determining a sequence group index u of a physical uplink shared channel (PUSCH).

In this case, the initial values of the first to third hopping patterns may have an offset of a predetermined constant value (a) so as not to be zero, and preferably, the predetermined constant value may be 1.

According to the embodiments of the present invention as described above, it is possible to adjust the hopping pattern of the UL RS sequence to have the same hopping pattern for the entire cell ID.

In addition, each hopping pattern may be collectively set by the same signaling information.

In addition, in the above-described RS sequence generation method, the initial value of the sequence for determining the hopping pattern may not be set to zero.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced.

The following detailed description includes specific details in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art appreciates that the present invention may be practiced without these specific details. In some instances, well-known structures and devices are omitted or shown in block diagram form, centering on the core functions of each structure and device, in order to avoid obscuring the concepts of the present invention. In addition, the same components will be described with the same reference numerals throughout the present specification.

As described above, an embodiment of the present invention is to provide a method of generating an RS sequence that adjusts a hopping pattern of a UL RS sequence to have the same hopping pattern for all cell IDs. To this end, the UL RS sequence hopping pattern will be described in more detail, and a method of efficiently adjusting the UL RS hopping pattern will be described. First, let's look at group hopping.

sequence  group Hopping  ( Sequence Group Hopping )

1 is a view for explaining the concept of group hopping in the 3GPP LTE system.

As shown in FIG. 1, group hopping in 3GPP LTE is applied according to a 2 layered hopping / shifting pattern. That is, a total of 504 hopping patterns may be generated as a combination of 17 root hopping patterns and 30 sequence shift patterns. In FIG. 1, only 24 sequence shift patterns are applied to the last root hopping pattern among 510 (= 17 * 30) patterns generated according to 17 root hopping patterns and 30 sequence shift patterns for each case. 504 hopping patterns are defined. The above-described root hopping pattern may be referred to as a "group hopping pattern" as a concept that is distinguished from a sequence shift pattern.

As such, the group hopping pattern and the sequence shift pattern for the group index u hopping of the RS sequence may be defined as follows.

는 그룹 호핑 패턴을,

는 시퀀스 시프트 패턴을 나타내며, n_s는 시간 인덱스로서 0, 1, ..., 19와 같다.here,

Group hopping patterns,

Represents a sequence shift pattern, and n _s is a time index equal to 0, 1, ..., 19.

는 상위 계층 시그널링을 통해 활성화(enable) 또는 비활성화(disable)될 수 있다. 또한, 상향링크 신호로서 PUSCH와 PUCCH는 동일한 그룹 호핑 패턴

를 가지면서도, 서로 다른 시퀀스 시프트 패턴

를 가질 수 있다.Group hopping pattern of the hopping pattern

Can be enabled or disabled through higher layer signaling. In addition, PUSCH and PUCCH are the same group hopping pattern as an uplink signal.

Different sequence shift patterns

It can have

는 다음과 같이 나타낼 수 있다.In more detail, group hopping patterns commonly applied to PUSCH and PUCCH.

Can be expressed as:

Equation 3 shows the case where the group hopping pattern is activated and the case is deactivated. In addition, c (n) is a pseudo-random sequence, and in the case of Equation 3, a gold sequence is used.

Here, the gold sequence used in the 3GPP LTE system will be briefly described.

In the 3GPP LTE system, the pseudo-random sequence may be defined by a 31 length gold sequence. An output sequence c (n) having a length M _PN is defined as follows.

에 따라 초기화될 수 있다. 또한, 두번째 m-시퀀스의 초기값은 시퀀스의 응용에 따른 값을 가지고

에 의해 나타내어질 수 있다. Where n is 0, 1, ..., M _PN- 1, and N _C is 1600. In addition, the first m-sequence

Can be initialized accordingly. Also, the initial value of the second m-sequence has a value according to the application of the sequence.

It can be represented by.

Meanwhile, the pseudo random sequence generator may be initialized to an initial value as follows in every radio frame (10 ms).

Here, c _init means an initial value for the second m-sequence in the gold sequence.

는 PUCCH와 PUSCH에 대해 서로 다르게 규정될 수 있다.On the other hand, as described above, the sequence shift pattern

May be defined differently for PUCCH and PUSCH.

라 할 경우 다음과 같이 나타낼 수 있다.Sequence shift pattern for PUCCH

In this case, it can be expressed as follows.

라 할 경우 다음과 같이 나타낼 수 있다.In addition, the sequence shift pattern for PUSCH

In this case, it can be expressed as follows.

는 0, 1, ..., 29 중 어느 한 수로 상위 계층에 의해 결정될 수 있다.here,

May be determined by the upper layer as any one of 0, 1, ..., 29.

의 초기값은 2 계층 호핑 패턴에서 17개의 루트 호핑 패턴과 관련된 것이며,

부분은 30개의 시퀀스 시프트 패턴과 관련된 것이다.In summary, as shown in Equation 5 above

The initial value of is associated with 17 root hopping patterns in a two-layer hopping pattern,

The part is related to 30 sequence shift patterns.

In group sequence  Hopping Sequence Hopping within  a Group )

Hereinafter, sequence hopping in a group will be described.

Sequence hopping in one group may be applied only to RSs having a length of 6RB or more. For RSs with a length of less than 6 RB, the default sequence index (v) in the group is always set to v = 0. Meanwhile, the intra-group sequence hopping described herein may be applied only when the above-described group hopping is deactivated.

For an RS having a length of 6 RB or more, the basic sequence index v in slot n _s may be expressed as follows.

Here, it is assumed that the pseudo random sequence c (n) uses the above-described gold sequence. In the case of such sequence hopping in the group, it may be initialized as follows at the beginning of every radio frame.

On the other hand, the following describes the circular movement hopping.

Circular movement hopping ( Cyclic Shift Hopping )

There is no clear definition of cyclic mobile hopping in 3GPP LTE. However, as described above, the RS is transmitted by applying a cyclic movement to a basic sequence to which sequence group hopping and / or intra-group sequence hopping is applied, and the cyclic movement applied at this time may be defined as follows. This will be described in terms of demodulation of the PUSCH.

라 할 경우, 이는 다음과 같은 관계를 만족한다.Demodulation reference signal sequence for PUSCH

In this case, it satisfies the following relationship.

-1이다. 또한,

즉, 상향링크 전송을 위해 스케줄링된 대역폭의 서브캐리어 단위 표현을 나타낸다.Where m = 0, 1, n = 0, ...,

-1. Also,

That is, it represents a subcarrier unit representation of the scheduled bandwidth for uplink transmission.

In Equation 10, the cyclic movement α in the slot can be expressed as follows.

In this case, n _cs may be represented as follows.

는 셀 내 가능한 최대 순환 이동의 수를 나타내며, 12로 설정될 수 있다. 또한,

는 방송 정보이며,

는 상향링크 스케줄링 할당에 포함되어 전송된다. 아울러,

는 골드 시퀀스에 의해 규정되는 상술한 의사 랜덤 시퀀스 c(n)에 의해 주어진다. here,

Represents the maximum possible number of cyclic movements in the cell and may be set to 12. Also,

Is broadcast information,

Is included in the uplink scheduling assignment and transmitted. together,

Is given by the pseudorandom sequence c (n) described above defined by the gold sequence.

의 값은 다음 표와 같이 주어질 수 있다.c (n) may be specifically applied per cell. Also,

The value of can be given as

에 대한 상위 계층 시그널링을 이용하여 구성될 수 있다. 따라서, 해당

를 통해 각 호핑 패턴을 통합적으로 구성하기 위한 방법의 모색이 필요하다.Sequence group hopping, intra-group sequence hopping, and cyclic shift hopping as described above are a hopping pattern applied to one channel (ie, UL RS) in one system.

It can be configured using higher layer signaling for. Therefore,

It is necessary to find a method for integrally constructing each hopping pattern.

에 의해 셀 ID가 상이한 셀간에도 동일한 호핑 패턴이 적용될 수 있도록 할 수도 있어야 한다. 다만, 상술한 그룹 내 시퀀스 호핑 및 순환 이동 호핑의 경우 서로 다른 셀 ID를 가지는 경우 중 동일한 호핑 패턴을 적용할 수 없는 경우가 발생할 수 있다.Also,

By doing so, the same hopping pattern may be applied to cells having different cell IDs. However, in the above-described group hopping and cyclic shift hopping, the same hopping pattern may not be applied among the cases having different cell IDs.

을 가지고, 셀 B는

를 가지는 경우를 가정한다. 또한, 셀 A와 셀 B가 인접한 경우를 가정한다. For example, cell A

Has cell B

Assume the case with In addition, it is assumed that cell A and cell B are adjacent to each other.

In this case, the initial value of the sequence hopping pattern sequence in the group of cells A may be calculated as follows according to Equation (9).

In addition, the initial value of the sequence hopping pattern sequence in the group of cells B may be calculated as follows according to Equation (9).

에 따라 0~29까지의 값을 가질 수 있는 반면, 셀 B의 그룹 내 시퀀스 호핑 패턴 초기값은 0~29까지의 값을 가질 수 있는

에 따라 512~541까지의 값을 가지게 된다. 따라서, 셀 A와 셀 B는 동일한 호핑 패턴을 구성할 수 없게 된다. 이와 같이 인접한 셀에 대해 동일한 호핑 패턴을 적용할 수 없는 경우 eNode B 특정 할당을 수행할 수 없게 된다.That is, the initial value of the sequence hopping pattern in the group of cell A may have a value from 0 to 29.

In this case, the initial value of the sequence hopping pattern in the group of the cell B may be 0 to 29, depending on the range of 0 to 29.

It will have a value from 512 to 541. Thus, cell A and cell B cannot form the same hopping pattern. As such, when the same hopping pattern cannot be applied to adjacent cells, eNode B specific allocation cannot be performed.

이 0부터 29까지의 경우에는 초기값(c_init)이 0이 되어 레지스터의 초기값이 0이 되어 시퀀스가 생성되지 않는 문제가 발생할 수 있다. In addition, even in sequence group hopping, the initial value is defined as in Equation 5

In the case of 0 to 29, the initial value c _init becomes 0 and the initial value of the register becomes 0 so that a sequence may not be generated.

만을 가 지고 상술한 3가지 호핑 패턴을 모두 구성할 수 있는 방법을 제공하고자 한다. 이때 셀 ID가 상이하더라도 동일한 양 셀이 호핑 패턴을 가질 수 있도록 설정한다.Thus, in one embodiment of the present invention described below, it is possible to make use of the two-layer hopping concept described above with respect to FIG. 1, and to use one signaling, for example

It is intended to provide a method of having all three hopping patterns described above. At this time, even if the cell ID is different, the same cell is set to have a hopping pattern.

In addition, as described above, it is intended to provide a method of preventing a problem in which an initial value of a register becomes zero.

First, according to one embodiment of the present invention, in order to prevent a problem that the initial value becomes 0 when the cell ID is 0 to 29 when using the initial value as shown in Equation 5, the following initial value is proposed. .

Here, a means a nonzero number.

로 사용하는 것을 제안한다.In particular, it is proposed that a is preferably set to one. When a is set to 1 in Equation 15, the degree of freedom of initial value selection is increased. For example, when determining a in Equation 15 as 2 ³¹ -2, the initial value c _init may have only two values of 2 ³¹ -2 or 2 ³¹ -1, whereas a is 1 when setting the initial value (c _init) has the advantage that can have a 2 ³¹ -1 different values: 1 to 2 ³¹ -1. Therefore, in one preferred embodiment of the present invention, the initial value of the sequence group hopping pattern is

Suggest to use as.

Meanwhile, another embodiment of the present invention proposes a method in which sequence group hopping and intra group hopping can be collectively performed through one signaling by modifying the intra-group sequence hopping pattern as follows. The intra-group sequence hopping pattern according to the present embodiment can be represented as follows.

과 시퀀스 시프트 패턴

의 조합을 그대로 그룹 내 시퀀스 호핑에도 적용하는 방법을 제안한다. 이때 적용되는 그룹 호핑 패턴은 상기 수학식 3과 동일하게 적용될 수 있으며, 시퀀스 시프트 패턴은 PUCCH 또는 PUSCH에 따라 상기 수학식 6 또는 7과 같이 적용될 수 있다.That is, group hopping pattern used in sequence group hopping

And sequence shift patterns

We propose a method that can be applied to the sequence hopping in a group as it is. In this case, the applied group hopping pattern may be applied in the same manner as in Equation 3 above, and the sequence shift pattern may be applied as in Equation 6 or 7 according to PUCCH or PUSCH.

에 적용되는 초기값은 상기 수학식 5와 같이 동일하게 적용될 수도, 상술한 실시형태에 따라

이 적용될 수도 있다.In addition, the group hopping pattern

The initial value applied to may be equally applied as in Equation 5 above, according to the above-described embodiment

This may apply.

Meanwhile, in another embodiment of the present invention, the group hopping pattern and the group hopping pattern within the group are uniformly applied through one signaling, but the group hopping pattern applied to the sequence hopping in the group is applied to the sequence hopping pattern. And a variation of the sequence shift pattern. Specifically, the intra-group sequence hopping pattern according to the present embodiment may be defined as follows.

은 다음과 같이 규정될 수 있다.Here, the group hopping pattern applied to the sequence hopping in the group according to the present embodiment

Can be defined as follows.

In addition, according to the present embodiment, a sequence shift pattern applied to intra-group sequence hopping may be defined as follows for PUCCH and PUSCH.

에 적용되는 초기값으로는

또는

가 적용될 수 있다.Group hopping pattern also in this embodiment

The initial value applied to

or

Can be applied.

Meanwhile, another embodiment of the present invention proposes a method in which a cyclic shift hopping pattern is also defined uniformly with sequence group hopping and configured through one signaling. Specifically, the description will be given based on n _PRS of Equation 12 during cyclic movement hopping defined according to the present embodiment. N _PRS according to the present embodiment can be represented as follows.

는 다음과 같이 규정될 수 있다.here,

Can be defined as follows.

는 PUCCH와 PUSCH에 대해 각각 다음과 같이 규정될 수 있다.Also,

May be defined as follows for PUCCH and PUSCH, respectively.

의 초기값은 다음과 같이 규정될 수 있다.here,

The initial value of can be defined as

또는

or

Where 12 represents the maximum number of circular movements that can be applied.

In addition, according to the above-described embodiment, the following initial values may be used to prevent the initial values from becoming zero.

또는

or

및

역시 시퀀스 그룹 호핑에서와 통일적으로 적용하는 방법을 제안한다. 즉, 본 실시형태에 따른 n_PRS는 다음과 같이 나타낼 수 있다.Further, in another embodiment of the present invention, while changing the cyclic shift hopping pattern to be applied uniformly with the sequence group hopping pattern,

And

We also propose a method that is applied uniformly to sequence group hopping. That is, n _PRS according to the present embodiment can be represented as follows.

는 시퀀스 그룹 호핑에서와 통일적으로 다음과 같이 규정될 수 있다.here

Is uniformly defined as in sequence group hopping as follows.

역시 시퀀스 그룹 호핑에서와 마찬가지로 PUCCH 및 PUSCH에 대해 다음과 같이 규정될 수 있다.together,

Similarly to sequence group hopping, PUCCH and PUSCH may be defined as follows.

의 초기값은 상기 수학식 25 또는 26에 따라 규정될 수 있다.At this time

An initial value of may be defined according to Equation 25 or 26 above.

를 통해 시퀀스 그룹 호핑, 그룹 내 시퀀스 호핑 및 순환 이동 호핑이 통일적으로 규정되도록 설정하는 예를 설명하였다. 이와 같이 시퀀스 그룹 호핑 패턴을 기준으로 다른 호핑 패턴을 통일적으로 규정할 경우 상술한 바와 같이 서로 다른 셀 ID를 가진 경우에 동일한 호핑 패턴을 적용할 수 없는 문제 역시 해결할 수 있다. 또한, 초기값을 조정함으로써 초기값이 0으로 설정되어 시퀀스가 생성되지 않는 문제 역시 해결할 수 있다. In the above-described embodiments one signaling, for example

Through the above, an example of setting sequence group hopping, intra-group sequence hopping, and circular movement hopping to be uniformly defined has been described. As described above, when the other hopping patterns are uniformly defined based on the sequence group hopping pattern, the same hopping pattern may not be applied when there are different cell IDs as described above. In addition, by adjusting the initial value, it is also possible to solve the problem that the initial value is set to 0 and no sequence is generated.

Meanwhile, another embodiment of the present invention proposes to adjust the initial value so that the same hopping pattern can be applied to all cell IDs even if the intra-group sequence hopping pattern is not uniform with the sequence group hopping pattern. In more detail, the intra-group sequence hopping pattern according to the present embodiment may be defined as follows, similarly to the existing hopping pattern.

However, unlike the above equation (9), the initial value used in the present embodiment may be defined as follows.

항이 셀 ID에 따라 크게 달라지는 문제를 해결하기 위해 본 실시형태에서는

항에 모듈러 30 연산을 수행하여 셀 ID가 다르더라도 30 이내의 범위에서만 상기 항의 값이 달라지도록 함으로써 모든 셀 ID에 대해 동일한 호핑 패턴이 적용 가능하도록 설정하는 것을 제안한다.In other words,

In this embodiment, in order to solve the problem that the term varies greatly depending on the cell ID,

It is proposed to set the same hopping pattern to all cell IDs by performing a modular 30 operation on the term so that the value of the term varies only within a range within 30 even if the cell ID is different.

In a similar sense, the following initial value may be used instead of Equation 32.

On the other hand, it is also possible to generalize the equation (32) and the equation (33) as follows.

Here, K means a natural number such as 0, 1, ....

On the other hand, in order to solve the problem that the initial value is set to 0 from the initial value, such as Equations 32 to 34 may be used as the following initial value.

Here, K means a natural number such as 0, 1, ....

Each embodiment of the present invention described above is collectively described as follows.

FIG. 2 illustrates a method for enabling a sequence group index (u), a basic sequence index (v) in a group, and a cyclic shift value (α) to be set using one signaling information according to an embodiment of the present invention. Conceptual diagram.

에 의해 결정되도록 설정하는 것을 제안한다. 구체적으로 제 2 호핑 패턴 및/또는 제 3 호핑 패턴은 제 1 호핑 패턴에서의

항을 이용하여 설정됨으로써 하나의 시그널링 정보에 의해 통합적으로 설정되는 것이 가능하다. 아울러, 각 호핑 패턴의 초기값은 모든 셀 ID에 대해 동일한 호핑 패턴으로서 설정되는 것이 가능하게 된다.First, it is assumed that the sequence group index u, the base sequence index v in the group, and the cyclic shift value α are determined according to the first hopping pattern, the second hopping pattern, and the third hopping pattern, respectively. In addition, as shown in FIG. 2, in one embodiment of the present invention, the second hopping pattern and / or the third hopping pattern substantially determines signaling information, that is, the first hopping pattern.

It is suggested to set to be determined by. Specifically, the second hopping pattern and / or the third hopping pattern may be

By setting using the term, it is possible to collectively set by one signaling information. In addition, the initial value of each hopping pattern can be set as the same hopping pattern for all cell IDs.

3 is a conceptual diagram illustrating a method of adjusting an initial value of a sequence for determining a hopping pattern of a basic sequence index v in a group according to an embodiment of the present invention.

First, the hopping pattern of the base sequence index v in the group is referred to as a second hopping pattern for the above description and unification. Hopping pattern of the base sequence index (v) in such a group When the same hopping pattern cannot be set for different cell IDs as in the example of the above-mentioned cell A of cell ID 0 and cell B of 503 Will occur. However, as shown in FIG. 3, in one embodiment of the present invention, a modulo 30 operation is performed on a first term of an initial value of a sequence for determining a second hopping pattern so that the value of this term is changed within a range within 30. Suggested to do. This makes it possible to set the same hopping pattern for all cell IDs.

Meanwhile, in the embodiments described above with reference to FIGS. 2 and 3, the initial value of the sequence for determining each hopping pattern may have an offset corresponding to a predetermined constant value such that the initial value does not become 0. Preferably, the constant value is 1; Can be.

The detailed description of the preferred embodiments of the invention disclosed as described above is provided to enable any person skilled in the art to make and practice the invention. Although the above has been described with reference to the preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. I can understand that you can. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

According to each embodiment of the present invention as described above, a hopping pattern applied to uplink reference signal transmission can be easily set. Such a hopping pattern and a method of generating an uplink reference signal sequence using the same can be applied to any wireless communication system requiring hopping of a reference signal sequence as well as the above-described 3GPP LTE system.

1 is a view for explaining the concept of group hopping in the 3GPP LTE system.

FIG. 2 illustrates a method for enabling a sequence group index (u), a basic sequence index (v) in a group, and a cyclic shift value (α) to be set using one signaling information according to an embodiment of the present invention. Conceptual diagram.

3 is a conceptual diagram illustrating a method of adjusting an initial value of a sequence for determining a hopping pattern of a basic sequence index v in a group according to an embodiment of the present invention.

Claims (14)

In the method for generating an uplink reference signal sequence, Selecting a sequence group index u and a base sequence index v in the group to generate a base sequence corresponding to the selected indexes; And Applying a cyclic movement to the basic sequence according to a cyclic movement value α, The sequence group index u, the base sequence index v within the group, and the cyclic shift value α are changed according to a first hopping pattern, a second hopping pattern, and a third hopping pattern, respectively, in a time domain. At least one of the second hopping pattern and the third hopping pattern is configured according to signaling information for determining the first hopping pattern. The method of claim 1, The signaling information for determining the first hopping pattern includes a sequence shift pattern for determining the sequence group index (u).

A method of generating a reference signal sequence, which is signaling information for determining). The method of claim 2, The sequence shift pattern (

Signaling information for determining the difference between the sequence shift value applied to the physical uplink control channel (PUCCH) and the physical uplink shared channel (PUSCH) (

Information, a method of generating a reference signal sequence. The method of claim 1, If the first hopping is not applied to the base sequence index v in the group,

Is determined by remind

Is a group hopping pattern for determining the sequence group index (u),

Denotes a sequence shift pattern for determining the sequence group index (u). The method of claim 1, If the first hopping is not applied to the base sequence index v in the group,

Is determined by remind

Silver and above

Is a group hopping pattern for determining the sequence group index (u)

) And a sequence shift pattern for determining the sequence group index (u)

Reference signal sequence generation method). The method of claim 1, The cyclic shift value α is

Determined by N _cs is,

Determined by remind

Is above 12,

By the broadcast information,

Is specified by uplink scheduling allocation information, remind

Is,

Determined by remind

And said

Is a group hopping pattern for determining the sequence group index (u)

) And a sequence shift pattern for determining the sequence group index (u)

Reference signal sequence generation method). The method of claim 1, The cyclic shift value α is

Determined by N _cs is,

Determined by remind

Is above 12,

By the broadcast information,

Is specified by uplink scheduling allocation information, remind

Is,

Determined by remind

And said

Is a group hopping pattern for determining the sequence group index (u)

) And a sequence shift pattern for determining the sequence group index (u)

A reference signal sequence generation method set equal to). The method according to any one of claims 1 to 7, And an offset of a predetermined constant value (a) so that initial values of the first to third hopping patterns do not become zero. The method of claim 8, And the predetermined constant value is one. In the method for generating an uplink reference signal sequence, Selecting a sequence group index u and a base sequence index v in the group to generate a base sequence corresponding to the selected indexes; And Applying a cyclic movement to the basic sequence according to a cyclic movement value α, The sequence group index u, the base sequence index v within the group, and the cyclic shift value α are changed according to a first hopping pattern, a second hopping pattern, and a third hopping pattern, respectively, in a time domain. The initial value of the sequence for determining the second hopping pattern is set such that each component in the equation for calculating the initial value has a number within 30, uplink reference signal sequence generation method. The method of claim 10, The base sequence index in the group, if the first hopping is not applied,

Is determined by remind

Is a gold sequence generated by a predetermined generation equation,

A method of generating an uplink reference signal sequence having an initial value such as. (here,

Is the cell ID,

Denotes a sequence shift value used to determine a sequence group index (u) of a physical uplink shared channel (PUSCH)) The method of claim 10, The base sequence index in the group, if the first hopping is not applied,

Is determined by remind

Is a gold sequence generated by a predetermined generation equation,

A method of generating an uplink reference signal sequence having an initial value such as. (here,

Is the cell ID,

Denotes a sequence shift value used to determine a sequence group index (u) of a physical uplink shared channel (PUSCH)) The method according to any one of claims 10 to 12, And an offset of a predetermined constant value (a) so that initial values of the first to third hopping patterns do not become zero. The method of claim 13, And the predetermined constant value is one.

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