KR20130049456A - Method and apparatus for allocating resource for result of wireless signal transmission, transmitting and receiving the result - Google Patents

Abstract

PURPOSE: A transceiving method for resources of a wireless signal transmission result and a device thereof are provided to simultaneously transmit a PUSCH(Physical Uplink Shared CHannel) of a user terminal by effectively assigning PHICH(Physical Hybrid ARQ Indicator CHannel) resources. CONSTITUTION: A resource assignment unit(1310) assigns an E-PDCCH(Extended-Physical Downlink Control CHannel) to a wireless resources of a calculated index. The resource assignment unit generates the E-PDCCH by adding the calculated value to the E-PDCCH. A verification unit(1320) verifies a wireless signal transmitted from a user terminal. The user terminal receives a wireless signal including the E-PDCCH. A transmission and reception unit(1330) transmits the verification result to the user terminal. The transmission and reception unit receives signals from one or more user terminals. [Reference numerals] (1310) Resource assignment unit; (1320) Verification unit; (1330) Transmission and reception unit

Description

METHOD AND APPARATUS FOR ALLOCATING RESOURCE FOR RESULT OF WIRELESS SIGNAL TRANSMISSION, TRANSMITTING AND RECEIVING THE RESULT}

The present invention provides a method and apparatus for more efficiently allocating information indicating a transmission result between a user terminal and a base station to a radio resource and transmitting and receiving the same.

In a mobile communication system, a user terminal and a base station transmit and receive an ACK (Acknowledge) / NACK (Negative Acknowledge) or N / Ack by confirming the received signal to confirm whether the transmission of the radio signal was performed without error. And, it provides a mechanism (Hybrid Automatic Repeat reQuest) that retransmits the error portion during the transmission process.

On the other hand, in the mobile communication system, the base station transmits the signal transmission result in some resources of the frequency bandwidth for transmitting the radio signal, and these resources are set in a manner previously agreed with the user terminal. In order for the base station to provide a result of the transmission of the radio signal transmitted by the user terminal, the transmission result must be included in a resource of a location promised by the user terminal and the base station. However, when the number of user terminals increases, more radio resources including a transmission result to be provided to the user terminal are needed. Therefore, an increase of the user terminal or an increase of the transmission result that should be provided to the user terminal in a limited radio resource is required. It is necessary to efficiently process and secure radio resources.

When the number of UEs simultaneously performing uplink transmission increases, more radio resources are required for the HARQ process that provides the transmission result for the uplink transmission. Therefore, it is necessary to allocate HARQ resources, that is, PHICH resources more efficiently. Do. In this specification, for this purpose, the base station more efficiently allocates PHICH resources within a limited resource, so that PUSCH simultaneous transmission of multiple user terminals is supported.

According to an embodiment of the present disclosure, a method for allocating a resource for a radio signal transmission result and transmitting the same may include: an E-PDCCH instructing uplink allocation of a user terminal in a transmission terminal for transmitting and receiving radio signals to a plurality of user terminals; Transmitting a radio signal including an extended PDCCH to the user terminal, receiving a radio signal from the user terminal in an uplink resource allocated through the E-PDCCH, and receiving the received radio signal And transmitting the verification result of the E-PDCCH to the user terminal, wherein the verification result is included in a radio resource that can be calculated from a radio resource including the E-PDCCH or a radio resource that can be calculated from information included in the E-PDCCH. It is characterized by.

In another embodiment of the present disclosure, a method for receiving a resource for a wireless signal transmission result includes receiving, at a user terminal, a wireless signal including an E-PDCCH indicating uplink allocation from a transmitting end, wherein the E-PDCCH is received; Transmitting a radio signal in an uplink resource allocated through a PDCCH, and a result of verifying the transmitted radio signal is calculated from a radio resource that can be calculated from a radio resource including the E-PDCCH or information included in the E-PDCCH Receiving at a computable radio resource.

In another embodiment of the present disclosure, an apparatus for allocating a resource for a wireless signal transmission result and transmitting the same may include: The E-PDCCH is generated by allocating the E-PDCCH to a radio resource of a pre-computed index or including a pre-calculated value in the E-PDCCH so that a PDCCH indicates an index of a radio resource to transmit the uplink result. A resource allocating unit, a verifying unit verifying a radio signal transmitted by a user terminal receiving the radio signal including the E-PDCCH, and transmitting the verification result to the user terminal and receiving a signal from at least one user terminal. It includes a transceiver.

An apparatus for receiving a resource for a radio signal transmission result according to another embodiment of the present specification receives a radio signal including an E-PDCCH indicating uplink allocation from a transmitter, and is allocated through the E-PDCCH. A transceiver for transmitting a radio signal in a first radio resource for uplink, and a resource identification for calculating an index of a radio resource including the E-PDCCH or an index of a second radio resource from information included in the E-PDCCH And a transmitting / receiving unit receives an uplink transmission result transmitted from the first radio resource from the second radio resource.

1, 2, and 3 are diagrams illustrating a data transmission and reception process in a Het-Net environment.
4 is a table illustrating a PHICH group and a sequence index according to an embodiment.
FIG. 5 illustrates an example in which index information on a PHICH resource is included in an E-PDCCH according to an embodiment of the present specification.
FIG. 6 is a diagram illustrating an example in which only a part of index information indicating a PHICH resource is provided through an E-PDCCH according to an embodiment of the present specification.
FIG. 7 is a diagram illustrating a process of including all or part of information indicating a PHICH resource in an E-PDCCH according to one embodiment of the present specification.
FIG. 8 is a diagram for E-PDCCH scheduling according to another embodiment of the present disclosure to allow a UE to identify PHICH resources using the location of an E-PDCCH.
FIG. 9 is a diagram illustrating a process of including all or part of information indicating a PHICH resource in an E-PDCCH according to another embodiment of the present specification.
FIG. 10 is a diagram for E-PDCCH scheduling according to another embodiment of the present disclosure to enable a UE to identify PHICH resources using the location of the E-PDCCH.
FIG. 11 is a diagram illustrating a process of allocating a resource for a radio signal transmission result and transmitting the same in a transmitting end such as a base station and an RRH according to an embodiment of the present specification.
12 is a diagram illustrating a process of receiving a radio signal transmission result after transmitting a radio signal after receiving uplink allocation from a transmitting end such as a base station and an RRH according to an embodiment of the present specification.
13 is a diagram illustrating a configuration of a base station according to an embodiment of the present specification.
14 is a diagram illustrating a configuration of a user terminal according to one embodiment of the present specification.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible even if displayed on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In addition, the terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, the inventors should use the concept of terms in order to explain their own invention in the best way. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention based on the principle that it can be properly defined.

In the current mobile communication systems such as 3GPP, Long Term Evolution (LTE), LTE-A (LTE Advanced), etc., it is a high-speed, high-capacity communication system that can transmit and receive various data such as video and wireless data beyond voice-oriented services. Not only is the development of technology capable of transmitting large amounts of data comparable to wired communication networks, but also the proper error detection method to improve system performance by minimizing the reduction of information loss and increasing system transmission efficiency has become an essential element. .

Meanwhile, a communication system using a multiple-input multiple-output antenna (hereinafter referred to as "MIMO") may be used in both the transmitting and receiving ends, and may be a single UE (SU) or multiple UEs. MUs share the same radio resource capacity and receive or transmit a signal to one base station or the like.

In a system using MIMO, it is necessary to identify a channel state using various reference signals or reference signals, and to feed back the result to a transmission terminal (another device).

That is, when a single terminal is assigned a plurality of downlink physical channels, the terminal can adaptively optimize the system by feeding back channel state information for each physical channel to the base station. Signals of Channel Status Information Reference Signals (CSI-RS), Channel Quality Indicator (CQI) and Precoding Matrix Index (PMI) may be used, and the base station may use such channel status related information. Channels can be scheduled. In addition, a cell-specific reference signal (CRS) transmitted in the entire downlink subframe is also transmitted by the base station to user terminals in the cell. Meanwhile, a sounding reference signal (SRS) and a demodulation reference signal (DM RS) for demodulation are signals transmitted by the user terminal to the base station. That is, the CSI-RS is transmitted by the base station, and the PMI and CQI are information reported by the terminal.

The wireless communication system is widely deployed to provide various communication services such as voice and packet data, and the wireless communication system controls the behavior of a base station such as a user equipment (UE), a base station (base station, BS, or eNB), and an RRH. It includes a subsidiary unit. A terminal in the present specification is a comprehensive concept that means a user terminal in wireless communication. In addition to UE (User Equipment) in WCDMA, LTE, and HSPA, as well as MS (Mobile Station), UT (User Terminal), SS in GSM It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.

A base station or a cell generally refers to a station that communicates with a terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS. It may be called other terms such as a transceiver system, an access point, a relay node, and an RRH.

That is, in the present specification, a base station or a cell should be interpreted in a comprehensive sense indicating some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. It is meant to encompass various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node communication range.

In the present specification, the terminal and the base station are two transmitting and receiving entities used in implementing the technology or the technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to. The terminal 10 and the base station 20 are two (uplink or downlink) transmission and reception subjects used to implement the technology or the technical idea described in the present invention, which are used in a generic sense and are specifically referred to in terms or words. It is not limited by. Here, the uplink (Uplink, UL, or uplink) means a method for transmitting and receiving data to the base station 20 by the terminal 10, the downlink (Downlink, DL, or downlink) is the base station 20 By means of a method for transmitting and receiving data to the terminal 10 by.

There is no limitation on the multiple access scheme applied to the wireless communication system. Various multiple access techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA Can be used.

The uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.

One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB. The present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.

Meanwhile, in LTE, a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers. The uplink and downlink transmit control information through control channels such as Physical Downlink Control CHannel (PDCCH), Physical Control Format Indicator CHannel (PCFICH), Physical Hybrid ARQ Indicator CHannel (PHICH), and Physical Uplink Control CHannel (PUCCH). A data channel is configured such as PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel) and the like to transmit data.

In LTE-A, a standard based on a single carrier in LTE is discussed, and a combination of several bands having a band smaller than 20 MHz is discussed, while a component carrier band having a band of 20 MHz or more is being discussed. In LTE-A, multi-carrier aggregation (hereinafter referred to as 'CA') is basically discussed in consideration of backward compatibility based on LTE's basic specifications. Up to five component carriers are considered in the link. Of course, the five component carriers can be increased or decreased according to the environment of the system, the present invention is not limited thereto. Hereinafter, the CC set refers to a set of two or more CCs configured for use in a corresponding system.

In CA, uplink ACK / NACK (ACKnowledgement / Negative ACKnowledgement) transmission, channel quality indicator (CQI), and precoding matrix indicators (PMI) are considered among various considerations related to control channel design. , Which is referred to as " PMI ") and RI (Rank Indicator (hereinafter, referred to as " RI ")).

LTE-A is basically considering backward compatibility of 3GPP LTE Rel-8 for the configuration of CA. CQI / PMI / RI information determined as a standard in LTE Rel-8 is performed by various methods through a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) which are uplink control channels.

A wireless communication system to which an embodiment of the present specification is applied may support uplink and / or downlink HARQ.

On the other hand, when the number of user terminals in the base station increases, the control signal provided to the user terminal is increased, and the resource to which the control signal is transmitted also requires more. In an embodiment in which the number of user terminals is increased, the number of user terminals is gradually increased in a cell managed by the base station, and the number of user terminals is increased by using various multiplexing methods. In the latter case, a coordinated multi-point transmission / reception system or a coordinated multi-antenna transmission system in which two or more transmitters cooperate to transmit a signal , A cooperative multi-cell communication system (hereinafter referred to as "cooperative multi-cell communication system" or "CoMP"). In particular, in such a multi-cell communication system, various types of micros such as femto cells, pico cells, relays, hot spots, etc., located within a cell radius of one macro base station Or it may be local base stations (Remote Radio Head, hereinafter referred to as RRH). A network composed of various types of base stations is called a heterogenous network (hereinafter referred to as Het-Net).

Meanwhile, the data transmission and reception process in the Het-Net environment will be described in more detail with reference to FIGS. 1, 2, and 3. 1, 2, and 3, the macro base station will be described collectively as an eNB, and the micro or local base station will be described as RRH.

When a plurality of RRHs 110, 120, 130, 140 and eNB 100 share the same cell ID, PUSCH transmission and corresponding PHICH transmission are performed in the following manner. The eNB 100 performs CRS and CSI-RS broadcasting, and each of the RRHs 110, 120, 130, and 140 performs CSI-RS broadcasting. According to the configuration of the network, the RRH may also transmit the CRS, but in the case of FIG. 1, the CRS transmitted by the RRH is configured as part of the CRS transmitted by the eNB or configured in the same pattern. On the other hand, the CSI-RS transmitted by the RRH is broadcast through a different port than the CSI-RS transmitted by the eNB.

The eNB 100 may receive the SRS and other uplink signals transmitted by the user terminal and determine the location of each terminal or the channel state of the terminal, and set uplink of each terminal according to the identified information. (uplink configuration) can be configured. 2 is an example of the configuration. Each UE 111, 121, 131, 132, and 141 attempts to transmit a PUSCH to the RRHs 110, 120, 130, and 140, or attempts to transmit a PUSCH directly to the eNB 100 such as UEs 101 and 102. Can be. In FIG. 2, the eNB 100 and the RRHs 110, 120, 130, and 140 each create an uplink connection with one or two terminals. The PUSCH is transmitted together with the DM RS, and each receiving end attempts to decode the PUSCH using the DM RS.

However, in the case of PHICH, channel measurement is performed through the CRS and decoding is performed using the measured channel value. This means that channel estimation should be channel estimation, and this means that the band where the CRS is provided and the band where the PHICH is provided must be the same, and therefore, the PHICH transmission should be performed through the transmitting end performing the CRS transmission. This means that, as shown in FIG. 3, the eNB 100 or all transmission terminals (eNB, RRH, etc.) performing CRS transmission should perform PHICH transmission for all UEs performing PUSCH transmission.

This is compared with the case in which PHICH transmission is performed only for a UE having a PUSCH connection directly to the eNB, and the eNB should perform PHICH resource management (resource management or resource management) for more PUSCH transmission. This can be a significant burden on resources. In the following specification, resources and resources are used in the same sense and may be used interchangeably.

As shown in FIG. 2, in order to allow uplink transmission for a plurality of terminals, a plurality of uplink grants must be transmitted to the terminal, which is an E-PDCCH (Extended PDCCH, or X-PDCCH). It is impossible without use.

That is, as shown in FIG. 3, an uplink grant is transmitted by a plurality of E-PDCCHs when a PHICH resource shortage or a PHICH collision problem occurs. In this specification, a method of selecting a PHICH resource using information such as using an E-PDCCH resource or receiving an E-PDCCH, a resource used for transmitting an E-PDCCH, and the like is presented.

First, a brief description of the E-PDCCH, MIMO, CoMP, Het-Net described above is a technique for improving the performance of a wireless communication system. When applying this technique, more control information may be required. The resource of the control region may be insufficient to allocate a plurality of PDCCHs for transmitting control information. Herein, the control region means a radio resource region including a PDCCH.

Therefore, increasing the efficiency of the existing control region may be considered as a method for increasing the maximum number of PDCCHs in the control region. The PDCCH existing in the existing control region may be newly defined and simply implemented, or a part of the data region including the PDSCH may be used for the control information. Thus, unlike the existing PDCCH configuration, the newly designed PDCCH for transmitting more PDCCH is referred to as E-PDCCH. The implementation manner of the E-PDCCH may vary, and the invention described herein is not limited to the implementation manner of a specific E-PDCCH.

Hereinafter, in the present specification, the PHICH resource allocation method using the legacy PDCCH (legacy-PDCCH) is different from the PHICH resource allocation method using the E-PDCCH, thereby increasing the allocation efficiency of the PHICH resource.

PHICH resource allocation of a user terminal using an existing PDCCH, that is, a PHICH resource for performing N / Ack transmission of a base station for a PUSCH transmitted by a user terminal is determined by a PHICH group and a PHICH sequence. Is determined. Each PHICH group is composed of 8 orthogonal codes for a subframe using a normal CP (Cyclic Prefix), and 4 orthogonal codes for a subframe using an extended CP. Each cell determines the total amount of PHICH resources by selecting the number of PHICH groups, and performs PHICH resource management by selecting PHICH groups and PHICH sequences to deliver N / Ack to each UE.

으로 모든 서브프레임에서 동일하며, TDD 시스템의 경우 PHICH 그룹의 수는

으로 각 서브프레임에서 다른 크기의 PHICH 리소스를 사용한다.

은 수학식 1에 의해 정의되며,

값은 표 1에 명시된 바와 같이, 서브프레임 i에 따라 m 값이 달라진다. 수학식 1에서,

는 다운링크 대역에서 정의되는 리소스 블록(resource block)의 수이며,

은 {1/6, 1/2, 1, 2}의 값을 가지며, 이는 상위 계층 시그널링(high layer signaling)을 통해 단말과 기지국이 공유하는 인자이다.For FDD systems, the number of PHICH groups is

, And in the case of TDD systems, the number of PHICH groups is

In each subframe, a different size PHICH resource is used.

Is defined by Equation (1)

As specified in Table 1, the value of m varies according to subframe i. In Equation 1,

Is the number of resource blocks defined in the downlink band,

Has a value of {1/6, 1/2, 1, 2}, which is a factor shared by the UE and the base station through high layer signaling.

[Equation 1]

[Table 1]

)및 PHICH 시퀀스 (PHICH Sequence Index,

)값(인덱스)에 의해 결정된다. A PHICH resource that performs N / Ack reporting on a PUSCH is a PHICH group (PHICH Group Index, calculated from the PHICH index of Equation 2 below.

) And PHICH Sequence (PHICH Sequence Index,

) Value (index).

&Quot; (2) "

The PHICH sequence has a value of 0-7 or 0-3, and may be applied as shown in Table 2 below.

[Table 2]

일 때

및

값에 의해 결정되는 PHICH 그룹 및 sequence index에 대한 도표이다. 4, 25 resource blocks (RBs) are used in the uplink and the downlink.

when

And

Table of PHICH group and sequence index determined by value.

및

값에 의해 동일한 PHICH 리소스가 지정될 수 있다. 예를 들어, PHICH 그룹(

)이 2이며, PHICH 시퀀스 (

)가 1인 경우는 도 4에 점선-타원형으로 표시된 바와 같이 다수가 존재하는데, 이들 모두 서로 다른

및

값에 의해서도 동일한 PHICH 그룹/시퀀스 값이 나오는 것을 알 수 있다. As can be seen in Figure 4, in many cases different

And

The same PHICH resource may be designated by the value. For example, the PHICH group (

) Is 2, and the PHICH sequence (

In the case of 1), there are a large number as indicated by dotted-ellipse in FIG.

And

It can be seen that the same PHICH group / sequence value also comes from the value.

Accordingly, the base station can perform PUSCH scheduling for each user terminal that is allocated uplink by the PDCCH, avoiding the above case.

은 PHICH 전송을 위해 할당한 VRB(virtual resource block)내에서 N/Ack이 차지하는 상대적 위치를 지시하는 인자이며, 상기 리소스가 어느 물리적 리소스에 매핑(mapping)되는가에 대한 부분은 별도의 PHICH 영역(region)의 정의에 따를 수 있다. In the above formula,

Is a factor that indicates the relative position occupied by N / Ack in a virtual resource block (VRB) allocated for PHICH transmission, and which physical resource is mapped to which physical resource is mapped to a separate PHICH region (region) ) Can be followed.

As shown in FIG. 4, the PHICH resource of the user terminal received uplink allocation through the PDCCH may be allocated the same PHICH resource even if different PUSCH resources are allocated, and thus, scheduling to adjust the PUSCH region is applied to avoid this. However, in the case of the E-PDCCH, since additional information can be added to the E-PDCCH, it is not necessary to perform new scheduling of the PUSCH resource or to reduce the scheduling range to the minimum, and direct or indirectly indicate the PHICH resource. Can be considered. In this case, there is an advantage that the PHICH resource can be allocated without changing the user terminal using the legacy PDCCH (PDCCH).

As a first embodiment, a method of directly indicating a PHICH resource, and a method of providing full index information on the PHICH resource through an E-PDCCH will be described. To this end, the E-PDCCH may separately include a field indicating group information and sequence information, which are index information for PHICH resources.

)이 포함된다. 한편, PHICH 시퀀스 인덱스 필드(520)에는 PHICH 리소스에 대한 시퀀스 인덱스 값(

)이 포함된다. 이들 두 필드 중에서 시퀀스 인덱스 필드(520)는 앞서 수학식 2의 방식으로 산출할 수도 있다. 따라서, 기지국은 E-PDCCH의 하나의 필드(510) 또는 두 필드(510, 520)를 이용하여 업링크 할당을 전송할 경우, 사용자 단말은 수신된 E-PDCCH의 각 필드를 이용하여 수학식 3 또는 4와 같이 PHICH 리소스 지시 정보를 확인할 수 있으며, 그 결과 PHICH 리소스를 할당할 수 있다. FIG. 5 illustrates an example in which index information on a PHICH resource is included in an E-PDCCH according to an embodiment of the present specification. Two fields 510 and 520 may be included in the E-PDCCH region 500. The at least one field may be referred to as a PHICH indicator or indication information. First, the PHICH group index field 510 contains the group index value for the PHICH resource (

) Is included. Meanwhile, the PHICH sequence index field 520 has a sequence index value for the PHICH resource (

) Is included. Of these two fields, the sequence index field 520 may be calculated by using Equation 2 above. Accordingly, when the base station transmits an uplink allocation using one field 510 or two fields 510 and 520 of the E-PDCCH, the user terminal may use Equation 3 or 3 by using each field of the received E-PDCCH. As shown in FIG. 4, PHICH resource indication information may be checked, and as a result, PHICH resource may be allocated.

&Quot; (3) "

을 이용하여 PHICH 그룹 인덱스(

)값을 산출하고, PHICH 시퀀스 인덱스의 값은 PDCCH 단말에서와 마찬가지 방식으로 수학식 3과 같이

값을 산출할 수 있다.
In Equation 3, the value of the PHICH group index field 510 of FIG. 5 indicates,

Using the PHICH group index (

), And the value of the PHICH sequence index is the same as in Equation 3 in the same manner as in the PDCCH terminal.

The value can be calculated.

&Quot; (4) "

을 이용하여 PHICH 그룹 인덱스(

)값을 산출하고, 도 5의 PHICH 시퀀스 인덱스 필드(520)의 값이 지시하는

를 이용하여 PHICH 시퀀스 인덱스 (

)값을 산출할 수 있다. In Equation 4, as indicated by Equation 3, the value of the PHICH group index field 510 of FIG. 5 is indicated.

Using the PHICH group index (

) Value, indicated by the value of the PHICH sequence index field 520 of FIG.

Using PHICH sequence index (

) Value can be calculated.

라 할 때, 수학식 1 및 Ng의 값을 2로 적용할 경우 수학식 5와 같이 산출 가능하다. The length of the PHICH group index field 510 should be able to indicate the maximum possible number of PHICH groups. Therefore, the length of the PHICH group index field 510 is

In the case of applying the values of Equations 1 and Ng to 2, it can be calculated as Equation 5.

[Equation 5]

That is, as shown in Equation 5, the size of the PHICH group index field 510 is determined according to the downlink bandwidth (Downlink bandwith, or the number of RBs), which is determined by the maximum number of PHICH groups that can be set in a given downlink bandwidth. Is determined by

)는 3bit가 되며, 다운링크 대역폭(BW)가 10MHz이며 Normal CP인 경우 PHICH 그룹 인덱스 필드의 크기 (

)는 4bit가 된다.
Therefore, applying Equation 5, if the downlink bandwidth (BW) is 5MHz and Normal CP, the size of the PHICH group index field (

) Is 3 bits, and if the downlink bandwidth (BW) is 10 MHz and normal CP, the size of the PHICH group index field (

) Is 4 bits.

Meanwhile, as shown in Table 2, the length of the PHICH sequence index field 520 has a length of 3 bits in the case of Normal CP, which indicates 8 pieces of sequence information, and 4 cases in the case of Extended CP. Since the sequence information of must be indicated, the length is 2 bits.

Therefore, when both the PHICH group index field 510 and the PHICH sequence index field 520 are indicated in the E-PDCCH region, it may take up to 7 bits. However, the E-PDCCH is a part that considers various expansion possibilities, and the 7-bit data growth may have a better effect than scheduling of the PUSCH.

The user terminal may identify the PHICH resource to which the HARQ result for the uplink performance is applied by applying Equation 3 or Equation 4 using the value of the field included in the E-PDCCH indicating uplink allocation. .

As a second embodiment, a method of providing only a part of index information indicating a PHICH resource through an E-PDCCH will be described.

FIG. 6 is a diagram illustrating an example in which only a part of index information indicating a PHICH resource is provided through an E-PDCCH according to an embodiment of the present specification.

In the first embodiment, even when only the PHICH group index is transmitted, up to 4 bits of information may be transmitted. In order to reduce the signaling overhead of E-PDCCH, PHICH resource allocation is performed by dividing the PHICH into PHICH subgroups only for the PUSCH triggered by the E-PDCCH. You can consider the method. Each terminal recognizes a category of a PHICH group that can be allocated through high layer signaling, and may perform PHICH group allocation within the category.

).그리고, 기지국은 도 6의 E-PDCCH 영역(600)의 PHICH 그룹 서브셋 인덱스(610)의 값(

)을 수학식 6과 같이 이용하여 산출할 수 있다.For example, if the PHICH group is {0, 1, 2, 3, 4, 5, 6}, they are divided into subsets such as {0, 1, 2, 3} and {4, 5, 6}. And, through the upper layer signaling, the PHICH subset allocated to each terminal may indicate whether {0, 1, 2, 3} or {4, 5, 6} (

And, the base station determines the value of the PHICH group subset index 610 of the E-PDCCH region 600 of FIG.

) Can be calculated using Equation 6.

&Quot; (6) "

는 각 단말이 할당 받은 PHICH 그룹 서브셋 내에서 각 단말이 할당 받을 PHICH 그룹에 대한 인덱스이며,

은 상위계층 시그널링에 의한 PHICH 그룹 지시 정보(또는 group offset)이다. In the above formula

Is an index for the PHICH group to be allocated to each UE in the PHICH group subset allocated to each UE.

Is PHICH group indication information (or group offset) by higher layer signaling.

를 통하여 해당 PHICH 서브셋이 {0, 1, 2, 3}으로 지시된 경우, 가능한 PHICH 그룹의 수는 총 4가지이므로,

의 길이, 즉, E-PDCCH의 PHICH 그룹 서브셋 인덱스(610)의 길이는 2 bit로 구현 가능하다. 반면 도 5의 방식을 적용할 경우에 7개의 PHICH 그룹 중에서 지시해야 하므로, E-PDCCH의 PHICH 그룹 인덱스(510)의 길이는 3bit로 구현 가능하다. previously

If the corresponding PHICH subset is indicated as {0, 1, 2, 3} through, since the total number of possible PHICH groups is 4,

The length of, i.e., the length of the PHICH group subset index 610 of the E-PDCCH can be implemented in 2 bits. On the other hand, when the method of FIG. 5 is applied, the length of the PHICH group index 510 of the E-PDCCH may be implemented as 3 bits since it should be indicated among 7 PHICH groups.

In the case of the PHICH sequence, it may be calculated through Equation 2 or set through additional E-PDCCH signaling through the PHICH sequence index 620 as described above with reference to FIG. 5.

The scheme of FIG. 5 does not require higher layer signaling and can immediately apply a PHICH resource allocation mechanism, but the number of group indexes to be transmitted in the E-PDCCH is large. In contrast, the scheme of FIG. 6 performs higher layer signaling and has a small number of group indexes to be transmitted on the E-PDCCH. The higher layer signaling divides PHICH resources into subframes and performs PHICH resource allocation through E-PDCCH in each subframe, thereby reducing signaling overhead.

By using the value of the field included in the E-PDCCH indicating uplink allocation, the user terminal uses the subset information of the group received through Equation 6 and higher layer signaling, and the HARQ result for the uplink performance is obtained. The PHICH resource to be allocated can be identified.

5 and 6 illustrate a method of instructing allocation of PHICH resources using an area of the E-PDCCH.

In the third embodiment, a method of determining a PHICH resource by a resource block (RB) through which an E-PDCCH is transmitted will be described.

When the index value of the PRB (Physical Resource Block) through which the E-PDCCH is transmitted is referred to as E _{PRB _ RA} , the BS controls the value, so that the UE and group and sequence information for PHICH resource allocation as shown in Equation 7 below. Implement to calculate

[Equation 7]

According to Equation 7, it is possible to change the PHICH group indexing or PHICH sequence indexing, respectively. Accordingly, PHICH resource allocation may be performed using both of the above equations, or PHICH resource allocation may be performed by mixing one of the equations and the existing one.

As another method, in calculating the PHICH group and the sequence as shown in Equation 8, it may be implemented to calculate by applying different parameters.

[Equation 8]

When applying the third embodiment, the base station performs scheduling of the E-PDCCH. This is because the PHICH group and sequence information are calculated using the PRB index through which the E-PDCCH is transmitted, as shown in Equations 7, and 8. Accordingly, the E-PDCCH scheduling is performed like the PUSCH scheduling of the UE that receives the PDCCH, so that PHICH resource collision due to the same group / sequence does not occur. However, since E-PDCCH scheduling has less impact on network efficiency than PUSCH scheduling, overall system performance may be improved.

The user terminal uses the index E _{PRB _ RA} of the physical resource block of the E-PDCCH indicating the uplink allocation and the index I _{PRB _ RA} of the uplink allocated physical resource block. As shown in FIG. 8, a PHICH resource to which an HARQ result for uplink performance is allocated may be identified.

FIG. 7 illustrates uplink allocation by including all or a part of information indicating a PHICH resource in an E-PDCCH according to an embodiment of the present specification, and when a user terminal performs uplink transmission thereafter, HARQ result Is a diagram illustrating a process of including a transmission in a downlink radio signal. The eNB of FIG. 7 becomes an embodiment of a base station, and the UE becomes an embodiment of a user terminal or a terminal.

The eNB 700 determines an uplink grant of a specific UE 701 (S710). When the uplink transmission (PUSCH) is indicated by the E-PDCCH, it is possible to determine a Group and Sequence value indicating the PHICH resource including the HARQ result for the uplink transmission (S720). . The E-PDCCH is generated to be included in a specific field of the E-PDCCH indicating the uplink allocation. As described above with reference to FIGS. 5 and 6, only the group value is included, the group / sequence value is included, or the PHICH group is divided into subsets, and the PHICH subset is notified in advance as shown in FIG. The method of indicating a group can be applied.

The eNB 700 transmits a downlink including the generated E-PDCCH (S740). The UE 701 knows that uplink allocation has been made through the E-PDCCH. In addition, information (group and / or sequence information) indicating a PHICH resource included in the E-PDCCH is extracted (S750). In operation S760, uplink transmission (PUSCH transmission) is performed on the allocated uplink resource.

When the PUSCH transmission is made, the eNB 700 proceeds with the HARQ process. That is, the eNB 700 proceeds the HARQ process with respect to the received uplink (PUSCH transmission) (S770), includes the HARQ process result in the PHICH resource determined in S720, and performs downlink transmission (S780, S790). Thereafter, the UE 701 checks the HARQ result included in the PHICH resource indicated in S750 among the received PHICH resources (S795), and determines whether to retransmit.

FIG. 8 performs E-PDCCH scheduling according to another embodiment of the present specification so that the UE can identify PHICH resources using the location of the E-PDCCH. In addition, the E-PDCCH performs uplink allocation, and when the user terminal performs uplink transmission, the E-PDCCH shows a process of including the HARQ result in the downlink radio signal and transmitting the uplink transmission. The eNB of FIG. 8 becomes an embodiment of a base station, and the UE becomes an embodiment of a user terminal or a terminal.

The eNB 800 determines an uplink grant of a specific UE 801 (S810). When the uplink transmission (PUSCH) is indicated by the E-PDCCH, a group and sequence value indicating a PHICH resource including a HARQ result for the uplink transmission may be determined (S820). . E-PDCCH scheduling is performed such that the E-PDCCH indicating the uplink allocation is transmitted at a position capable of calculating the determined group and sequence of PHICH resources (S830). As described in the third embodiment, the E-PDCCH may be scheduled such that a group or sequence of PHICH resources is calculated according to the index of the resource block of the E-PDCCH.

The eNB 800 transmits a downlink including the generated E-PDCCH (S840). The UE 801 grasps that uplink allocation has been made through the E-PDCCH. In addition, as described in the third embodiment, information (group and / or sequence information) indicating a PHICH resource is extracted using the physical resource and the uplink allocation resource of the E-PDCCH (S850). In operation S860, uplink transmission (PUSCH transmission) is performed on the allocated uplink resource.

When the PUSCH transmission is made, the eNB 800 proceeds with the HARQ process. That is, the eNB 800 proceeds to the HARQ process with respect to the received uplink (PUSCH transmission) (S870), includes the HARQ process result in the PHICH resource determined in S820, and performs downlink transmission (S880 and S890). Thereafter, the UE 801 checks the HARQ result included in the PHICH resource indicated in S850 among the received PHICH resources (S895), and determines whether to retransmit.

Although not shown in Figures 7 and 8, the downlink / uplink transmission of S740, S760, S840, S860 may be made through the RRH. This may be configured as shown in FIGS. 9 and 10.

FIG. 9 includes uplink allocation by including all or part of information indicating a PHICH resource in an E-PDCCH according to an embodiment of the present specification as shown in FIG. 7, and then, when a user terminal performs uplink transmission, A diagram showing a process of including the HARQ result in the downlink radio signal and transmitting. In FIG. 9, the RRH 905 performs separate communication with the eNB 900 through a medium such as optical communication, and transmits and receives a radio signal with the UE 901.

The eNB 900 and the RRH 905 determine an uplink grant of a specific UE 901 (S910). When the uplink transmission (PUSCH) is indicated by the E-PDCCH, the eNB 900 and the RRH 905 indicate a group and sequence indicating a PHICH resource including a HARQ result for the uplink transmission. Seq) value can be determined (S920). The RRH 905 generates the E-PDCCH such that a value indicating the determined group and sequence is included in a specific field of the E-PDCCH indicating the uplink allocation. As described above with reference to FIGS. 5 and 6, only the group value is included, the group / sequence value is included, or the PHICH group is divided into subsets, and the PHICH subset is notified in advance as shown in FIG. The method of indicating a group can be applied.

The RRH 905 transmits a downlink including the generated E-PDCCH (S940). The UE 901 knows that uplink allocation has been made through the E-PDCCH. In addition, information (group and / or sequence information) indicating a PHICH resource included in the E-PDCCH is extracted (S950). In operation S960, uplink transmission (PUSCH transmission) is performed on the allocated uplink resource.

When the PUSCH transmission is made, the RRH 905 provides the uplink PUSCH to the eNB 900 (S965). The provision includes the RRH 905 transmitting the uplink PUSCH to the eNB 900 via an optical communication network or the like. The eNB 900 proceeds with the HARQ process for this. That is, the eNB 900 proceeds with the HARQ process on the received uplink (PUSCH transmission) (S970), includes the HARQ process result in the PHICH resource determined in S920, and performs downlink transmission (S980, S990). Thereafter, the UE 901 checks the HARQ result included in the PHICH resource indicated in S750 among the received PHICH resources (S995), and determines whether to retransmit.

FIG. 10 performs E-PDCCH scheduling as shown in FIG. 8 so that the UE can identify PHICH resources using the location of the E-PDCCH. In addition, the E-PDCCH performs uplink allocation, and when the user terminal performs uplink transmission, the E-PDCCH shows a process of including the HARQ result in the downlink radio signal and transmitting the uplink transmission. In FIG. 10, the RRH 1005 performs separate communication with the eNB 1000 through a medium such as optical communication, and transmits and receives a radio signal with the UE 1001.

The eNB 1000 and the RRH 1005 determine an uplink grant of a specific UE 1001 (S1010). When the uplink transmission (PUSCH) is indicated by the E-PDCCH, the eNB 1000 and the RRH 1005 indicate a group and sequence indicating a PHICH resource including a HARQ result for the uplink transmission. A value of (Seq) may be determined (S1020). E-PDCCH scheduling is performed such that the E-PDCCH indicating the uplink allocation is transmitted at a position capable of calculating the determined group and sequence of PHICH resources (S1030). As described in the third embodiment, the E-PDCCH may be scheduled such that a group or sequence of PHICH resources is calculated according to the index of the resource block of the E-PDCCH.

The RRH 1005 transmits a downlink including the generated E-PDCCH (S1040). The UE 1001 grasps that uplink allocation has been made through the E-PDCCH. In addition, as described in the third embodiment, information (group and / or sequence information) indicating a PHICH resource is extracted using the physical resource and the uplink allocation resource of the E-PDCCH (S1050). In operation S1060, uplink transmission (PUSCH transmission) is performed on the allocated uplink resource.

When the PUSCH transmission is made, the RRH 1005 provides the uplink PUSCH to the eNB 1000 (S1065). The provision includes the RRH 1005 transmitting the uplink PUSCH to the eNB 1000 via an optical communication network or the like. The eNB 1000 proceeds with the HARQ process for this. That is, the eNB 1000 proceeds with the HARQ process on the received uplink (PUSCH transmission) (S1070), includes the HARQ process result in the PHICH resource determined in S1020, and performs downlink transmission (S1080, S1090). Thereafter, the UE 1001 checks the HARQ result included in the PHICH resource indicated in S1050 among the received PHICH resources (S1095), and determines whether to retransmit.

FIG. 11 is a diagram illustrating a process of allocating a resource for a radio signal transmission result and transmitting the same in a transmitting end such as a base station and an RRH according to an embodiment of the present specification. In addition, Figure 11 is a process made in the transmitting end for transmitting and receiving a radio signal to a plurality of user terminals characterized in that the transmitting end is composed of a base station or RRH.

The transmitter determines the uplink allocation of the user terminal and transmits a radio signal including the E-PDCCH indicating the uplink allocation of the user terminal to the user terminal (S1110). This includes a process in which the RRH or the base station transmits an uplink allocation through the E-PDCCH or the PDCCH as shown in FIG. 1.

Thereafter, a wireless signal is received from the user terminal in the uplink resource allocated through the E-PDCCH (S1120). This includes a process in which the RRH or the base station receives the PUSCH transmission from the user terminal as shown in FIG. 2.

In operation S1130, the transmitting end verifies the received radio signal. The verification result is a HARQ result for the PUSCH transmitted by the user terminal, and the radio resource including the verification result may be a PHICH resource. In addition, the transmitting end, in particular, the base station transmits the verification result to the user terminal (S1140).

The verification result of S1140 is included in a radio resource that can be calculated from a resource including the E-PDCCH or a radio resource that can be calculated from information included in the E-PDCCH. The radio resource that can be calculated from the information included in the E-PDCCH means to include group information or sequence information indicating a PHICH resource in a specific field of the E-PDCCH as in the first and second embodiments. That is, the E-PDCCH includes all or part of group information or sequence information indicating the PHICH resource. As described above with reference to FIGS. 5 and 6, only the group value is included, the group / sequence value is included, or the PHICH group is divided into subsets, and the PHICH subset is notified in advance as shown in FIG. The method of indicating a group can be applied.

Meanwhile, the radio resource that can be calculated from the resource including the E-PDCCH is calculated as a group or sequence of PHICH resources by using the index of the physical resource block of the E-PDCCH which performs uplink allocation, as in the third embodiment. It means an embodiment that can be done. That is, group information or sequence information indicating the PHICH resource can be calculated using the resource block index of the E-PDCCH. In other words, using the index E _{PRB _ RA} of the physical resource block of the E-PDCCH indicating uplink allocation and the index I _{PRB _ RA} of the uplink allocated physical resource block, Equation 7 or As shown in Equation 8, it is possible to identify a PHICH resource to which the HARQ result for the uplink execution is allocated.

S1110, S1120, S1130 may be made in cooperation with the base station and the RRH, or the base station / RRH alone. However, S1140 may transmit the PHICH including the verification result in the apparatus for transmitting the reference signal (for example, the CRS) for the entire cell, such as the base station, for example, the eNB.

When calculating a group or sequence of PHICH resources through a radio resource that can be calculated from a resource including an E-PDCCH in S1110, the PHICH resource calculated through the E-PDCCH does not collide with a PHICH resource of another user terminal. PDCCH scheduling may be additionally performed.

12 is a diagram illustrating a process of receiving a radio signal transmission result after transmitting a radio signal after receiving uplink allocation from a transmitting end such as a base station and an RRH according to an embodiment of the present specification. In addition, the transmitting end of Figure 12 is characterized by consisting of a base station or an RRH.

The user terminal receives a radio signal including the E-PDCCH indicating the uplink allocation from the transmitter (S1210). This includes a process in which the RRH or the base station is instructed to allocate uplink through the E-PDCCH or the PDCCH as shown in FIG. 1.

In operation S1220, a radio signal is transmitted on an uplink resource allocated through the E-PDCCH. This includes a process of transmitting a PUSCH to the RRH or the base station by the user terminal as shown in FIG.

Thereafter, the verification result of the transmitted radio signal is received from a radio resource that can be calculated from a resource including the E-PDCCH or a radio resource that can be calculated from information included in the E-PDCCH (S1230). Thereafter, the previously transmitted wireless signal may be retransmitted according to the verification result.

The verification result is a HARQ result for the PUSCH transmitted by the user terminal, and the radio resource including the verification result may be a PHICH resource. In particular, the user terminal receives the verification result from the base station. That is, from an apparatus for transmitting a reference signal (for example, CRS) for all cells, such as a base station, for example, an eNB, the user terminal may receive a PHICH including a verification result.

The verification result is included in a radio resource that can be calculated from a resource including the E-PDCCH or a radio resource that can be calculated from information included in the E-PDCCH. The radio resource that can be calculated from the information included in the E-PDCCH means to include group information or sequence information indicating a PHICH resource in a specific field of the E-PDCCH as in the first and second embodiments. That is, the E-PDCCH includes all or part of group information or sequence information indicating the PHICH resource. As described above with reference to FIGS. 5 and 6, only the group value is included, the group / sequence value is included, or the PHICH group is divided into subsets, and the PHICH subset is notified in advance as shown in FIG. The method of indicating a group can be applied.

Meanwhile, the radio resource that can be calculated from the resource including the E-PDCCH is calculated as a group or sequence of PHICH resources by using the index of the physical resource block of the E-PDCCH which performs uplink allocation, as in the third embodiment. It means an embodiment that can be done. That is, group information or sequence information indicating the PHICH resource can be calculated using the resource block index of the E-PDCCH. That is, the user terminal uses the index E _{PRB _ RA} of the physical resource block of the E-PDCCH indicating uplink allocation and the index I _{PRB _ RA} of the uplink allocated physical resource block, As shown in Equation 8, it is possible to identify a PHICH resource to which the HARQ result for the uplink performance is allocated.

13 is a diagram illustrating a configuration of a base station according to an embodiment of the present specification. In addition to the components of FIG. 13, the base station may further require various components to transmit and receive wireless signals to and from user terminals, and FIG. 13 illustrates components required to implement an embodiment of the present specification.

The base station includes a resource allocator 1310, a verification unit 1320, and a transceiver 1330.

The resource allocator 1310 allocates the E-PDCCH to a radio resource of a pre-calculated index so that the E-PDCCH indicating uplink allocation of a user terminal indicates an index of a radio resource for transmitting the uplink result. The E-PDCCH is generated by including a pre-calculated value in the E-PDCCH.

The verification unit 1320 verifies the radio signal transmitted by the user terminal receiving the radio signal including the E-PDCCH.

The transceiver 1330 transmits the verification result to the user terminal and receives a signal from one or more user terminals.

The verification result is a HARQ result for the PUSCH transmitted by the user terminal, and the radio resource including the verification result may be a PHICH resource.

The resource allocator 1310 may include all or part of group information or sequence information indicating the PHICH resource in the E-PDCCH.

This means that the group information or the sequence information indicating the PHICH resource is included in a specific field of the E-PDCCH as in the first and second embodiments. That is, the E-PDCCH includes all or part of group information or sequence information indicating the PHICH resource. As described above with reference to FIGS. 5 and 6, only the group value is included, the group / sequence value is included, or the PHICH group is divided into subsets, and the PHICH subset is notified in advance as shown in FIG. The method of indicating a group can be applied.

In addition, the resource allocator 1310 uses a resource block index of a radio resource to which the E-PDCCH is to be allocated such that group information or sequence information indicating the PHICH resource is calculated, and the resource to which the E-PDCCH is to be allocated. Scheduling can be performed for

This is an embodiment in which a group or sequence of PHICH resources can be calculated using the index of the physical resource block of the E-PDCCH that performs uplink allocation, as in the third embodiment. That is, group information or sequence information indicating the PHICH resource can be calculated using the resource block index of the E-PDCCH. In other words, using the index E _{PRB _ RA} of the physical resource block of the E-PDCCH indicating uplink allocation and the index I _{PRB _ RA} of the uplink allocated physical resource block, Equation 7 or As shown in Equation 8, the resource allocator 1310 may allocate the E-PDCCH to the radio resource of a predetermined index, so that the PHICH resource to which the HARQ result for the uplink performance is allocated is identified. In addition, the resource allocator 1310 may additionally perform E-PDCCH scheduling so that PHICH resources calculated through the E-PDCCH do not collide with PHICH resources of other user terminals.

14 is a diagram illustrating a configuration of a user terminal according to one embodiment of the present specification. In addition to the components of FIG. 14, the user terminal may further require various components to transmit and receive wireless signals with the base station, and FIG. 14 illustrates components required to implement an embodiment of the present specification.

The verification result checker 1410, the resource checker 1420, and a transceiver 1430.

The transceiver 1430 receives a radio signal including an E-PDCCH indicating uplink allocation from a transmitting end, for example, a base station, and the like, and then, in a first radio resource for uplink allocated through the E-PDCCH. Send a wireless signal.

The resource identification unit 1420 calculates an index of a second radio resource from an index of a radio resource including the E-PDCCH or information included in the E-PDCCH.

The transceiver 1430 receives an uplink transmission result transmitted from the first radio resource from the second radio resource, and a verification result confirmer 1410 confirms the uplink transmission result.

The verification result is a HARQ result for the PUSCH transmitted by the user terminal, and the radio resource including the verification result may be a PHICH resource. In particular, the user terminal receives the verification result from the base station. That is, from an apparatus for transmitting a reference signal (for example, CRS) for all cells, such as a base station, for example, an eNB, the user terminal may receive a PHICH including a verification result.

The resource identifying unit 1420 may be included in the E-PDCCH and may calculate an index of the second radio resource by using all or part of group information or sequence information indicating the PHICH resource. This means that, as in the first and second embodiments, the resource identification unit 1420 calculates an index of a radio resource including PHICH by using group information or sequence information indicating a PHICH resource in a specific field of the E-PDCCH. . That is, the E-PDCCH includes all or part of group information or sequence information indicating the PHICH resource. As described above with reference to FIGS. 5 and 6, only the group value is included, the group / sequence value is included, or the PHICH group is divided into subsets, and the PHICH subset is notified in advance as shown in FIG. The method of indicating a group can be applied.

In addition, the resource identification unit 1420 may calculate group information or sequence information indicating the PHICH resource by using the resource block index of the E-PDCCH. That is, as in the third embodiment, the resource identifying unit 1420 may identify the PHICH resource by calculating a group or sequence of PHICH resources using the index of the physical resource block of the E-PDCCH that performs uplink allocation. have. In other words, the UE uses the index E _{PRB _ RA} of the physical resource block of the E-PDCCH indicating uplink allocation and the index I _{PRB _ RA} of the uplink allocated physical resource block. As shown in Equation 7 or Equation 8, it is possible to identify a PHICH resource to which the HARQ result for uplink performance is allocated.

In the past, when determining the PHICH resource for performing N / Ack report by the band in which the PUSCH transmission is performed and the cyclic shift index (DM RS CS) of the DM RS used by the PUSCH transmission, to some terminals In order to avoid a collision in which N / Ack information to be transmitted uses the same PHICH resource, the collision is controlled so that the collision does not occur through scheduling of the base station. In this case, a PUSCH transmission is performed in the same subframe and a PHICH resource having an appropriate size is set in consideration of the number of UEs to perform N / Ack reception through PHICH in the same subframe, PUSCH band scheduling and uplink DM RS Through CS assignment, PHICH resources for N / Ack delivery could be distributed to each UE. This PHICH resource allocation method for performing each N / Ack has the advantage that PHICH resource allocation can be performed without signaling overhead, but it is impossible to manage dedicated resources (dedicated resource management). The efficiency of utilization may be diminished.

Downlink control channel capacity is increased by the use of E-PDCCH in CoMP scenario 4, and downlink shared channel capacity is also increased by the use of multiple transmission points. Increases. In addition, the capacity of an uplink shared channel and an uplink control channel is increased by the use of multiple reception points. In such an environment, when applying an embodiment of the present disclosure to support increased PUSCH capacity, PHICH resource management or PHICH resource enhancement may be achieved.

That is, in the present specification, information indicating a PHICH resource in the E-PDCCH so as to efficiently use radio resources when the number of UEs performing PUSCH transmission in the same subframe or N / Ack reception in the same subframe increases. The PHICH resource is calculated from the radio resources of the E-PDCCH by including some or all of the E-PDCCH scheduling or the PUSCH, which does not significantly affect the transmission efficiency. All transmission efficiency can be considered.

When implementing one embodiment of the present invention, it is possible to efficiently use the resources of the control region, such as PHICH. That is, in the uplink allocation process, the E-PDCCH scheduling may be performed in addition to the PUSCH scheduling, or the resource for the PHICH may be allocated to the E-PDCCH, so that the limited PHICH resource may be used more effectively.

 The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The 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.

Claims (18)

In the transmitting end for transmitting and receiving a radio signal to a plurality of user terminals,
Transmitting a radio signal including an extended PDCCH (E-PDCCH) indicating uplink allocation of the user terminal to the user terminal;
Receiving a radio signal from the user terminal in an uplink resource allocated through the E-PDCCH; And
Transmitting the verification result of the received wireless signal to the user terminal,
The verification result is included in a radio resource that can be calculated from a radio resource including the E-PDCCH or a radio resource that can be calculated from information included in the E-PDCCH, and allocates a resource for a radio signal transmission result How to send it.
The method of claim 1,
The verification result is a HARQ (Hybrid Automatic Repeat reQuest) result for the PUSCH (Physical Uplink Shared CHannel) transmitted by the user terminal, the radio resource including the verification result, characterized in that the radio signal transmission result How to allocate resources for and send them.
The method of claim 2,
The E-PDCCH includes all or part of group information or sequence information indicating the PHICH (Physical Hybrid ARQ Indicator CHannel) resource, the method for allocating and transmitting resources for the radio signal transmission result.
The method of claim 2,
Characterized in that group information or sequence information indicating the PHICH resource is calculated using the resource block index of the E-PDCCH,
Prior to transmitting the radio signal including the E-PDCCH, further comprising the step of performing scheduling on the resource to which the E-PDCCH is to be allocated.
The method of claim 1,
The transmitting end is composed of at least one of a base station or a remote radio head (RRH), and the verification result is the base station transmits to the user terminal, allocates the resource for the radio signal transmission result and transmit it How to.
In the user terminal,
Receiving a radio signal including an E-PDCCH indicating uplink allocation from a transmitting end;
Transmitting a radio signal on an allocated uplink resource over the E-PDCCH; And
And receiving a result of verifying the transmitted radio signal from a radio resource that can be calculated from a radio resource including the E-PDCCH or a radio resource that can be calculated from information included in the E-PDCCH. How to receive resources for
The method according to claim 6,
The verification result is a HARQ result for the PUSCH transmitted by the user terminal, characterized in that the radio resource including the verification result is a PHICH resource, the method for receiving a resource for a radio signal transmission result.
8. The method of claim 7,
The E-PDCCH may include all or part of group information (PHICH Group) or sequence information (PHICH Sequence) indicating the PHICH resource, the resource for the radio signal transmission result.
8. The method of claim 7,
Method for receiving a resource for a radio signal transmission result, characterized in that the group information or sequence information indicating the PHICH resource is calculated using the resource block index of the E-PDCCH.
The method according to claim 6,
The transmitting end is composed of any one or more of the base station or RRH, characterized in that the verification result is received from the base station, the method for receiving a resource for a radio signal transmission result.
In the transmitting end for transmitting and receiving a radio signal to a plurality of user terminals,
The E-PDCCH is allocated to a radio resource of a pre-computed index, or precomputed to the E-PDCCH, such that an E-PDCCH indicating uplink allocation of a user terminal indicates an index of a radio resource to transmit the uplink result. A resource allocator configured to generate the E-PDCCH by including the received value;
A verification unit for verifying a radio signal transmitted by a user terminal receiving the radio signal including the E-PDCCH; And
And a transceiver for transmitting the verification result to the user terminal and receiving a signal from at least one user terminal, the apparatus for allocating and transmitting resources for the wireless signal transmission result.
12. The method of claim 11,
The verification result is a HARQ result for the PUSCH transmitted by the user terminal, the radio resource including the verification result, characterized in that the PHICH resource, the apparatus for allocating and transmitting resources for the radio signal transmission result.
13. The method of claim 12,
And the resource allocator includes all or part of group information or sequence information indicating the PHICH resource in the E-PDCCH.
13. The method of claim 12,
The resource allocator uses a resource block index of a radio resource to which the E-PDCCH is to be allocated so that group information or sequence information indicating the PHICH resource is calculated, and performs scheduling on the resource to which the E-PDCCH is to be allocated. Apparatus for allocating resources for wireless signal transmission results and transmitting them.
A transceiver for receiving a radio signal including an E-PDCCH indicating uplink allocation from a transmitting end and transmitting a radio signal in a first radio resource for an uplink allocated through the E-PDCCH; And
A resource identification unit for calculating an index of a radio resource including the E-PDCCH or an index of a second radio resource from information included in the E-PDCCH;
And the transmitter / receiver receives an uplink transmission result transmitted from the first radio resource from the second radio resource.
16. The method of claim 15,
The verification result is a HARQ result for the PUSCH transmitted by the user terminal, characterized in that the radio resource including the verification result is a PHICH resource, the apparatus for receiving a resource for a radio signal transmission result.
17. The method of claim 16,
The resource checking unit is included in the E-PDCCH and receives a resource for a radio signal transmission result that calculates an index of the second radio resource using all or part of group information or sequence information indicating the PHICH resource. Device.
17. The method of claim 16,
And the resource checking unit calculates group information or sequence information indicating the PHICH resource by using the resource block index of the E-PDCCH.

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