KR20160121668A - The method and apparatus for operating UE and eNB for receiving and transmitting PHICH in carrier aggregation beyond 5 component carriers - Google Patents

Abstract

The present invention relates to a base station transmission method with respect to physical hybrid ARQ indicator channel (PHICH) transmission, a terminal receiving method, and a device thereof. A method for solving a PHICH collision comprises the following steps of: transmitting a physical uplink shared channel (PUSCH) in at least five component carriers (CC) and setting cross carrier scheduling; and setting a PHICH resource and transceiving the PHICH resource.

Description

[0001] The present invention relates to a base station transmission method, a terminal reception method, and a device for the PHICH transmission, and more particularly,

The present invention is applicable to carrier aggregation of CCs of more than 5 licensed bands or carrier aggregation of CCs of more than 5 licensed bands and CCs of unlicensed band, When carrier aggregation in the unlicensed band is configured, transmission operation of the base station to the DL PHICH transmission to enable non-adaptive retransmission as A / N for the PUSCH transmission transmitted from the UE through the multiple CCs, To a method of operation. In addition, the present invention can be applied to a scenario in which LTE is used in an unlicensed spectrum or a shared spectrum. In a scenario in which an LTE-U cell is bundled with a carrier aggregation form with existing LTE cells, And LTE-U cells are bundled into a carrier aggregation type, and can be applied also in the case of carrier aggregation or dual connectivity with LTE cells covering existing macro coverage, To an operation of a base station transmission and a reception method of a terminal for setting a corresponding PHICH resource when a base station transmits an A / N to a transmitted PUSCH through a PHICH.

The present invention defines a resource establishment scheme and related base station transmission and terminal operations for solving a PHICH collision when PUSCH is transmitted in five or more CCs and cross-carrier scheduling is configured.

FIG. 1 is a view showing a schematic diagram of a small cell in [1].
FIG. 2 is a view showing a small cell deployment scenario of FIG.
FIG. 3 is a view showing a small cell deployment scenario # 1 of FIG. B-2.
FIG. 4 is a view showing a small cell deployment scenario # 2a of FIG.
FIG. 5 is a view showing the B-4: Small cell deployment scenario # 2b.
FIG. 6 is a view illustrating the B-5: Small cell deployment scenario # 3. FIG.
7 is a diagram illustrating inter-node radio resource aggregation.
FIG. 8 is a diagram showing a dual connectivity structure example 1; FIG.
9 is a diagram showing a dual connectivity structure example 2;
Figure 10 is a reference picture depicting the CA and dual-connectivity scenarios mentioned.
Fig. 11 is a diagram exemplifying scenario 4; Fig.
12 is a view for explaining an embodiment of the present invention.
13 is a view for explaining another embodiment of the present invention.
10 is a diagram illustrating a configuration of a base station according to another embodiment of the present invention.
11 is a diagram illustrating a configuration of a user terminal according to another embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in 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.

Herein, the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement. In this specification, the MTC terminal may mean a terminal supporting low cost (or low complexity) and coverage enhancement. Alternatively, the MTC terminal may refer to a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.

In other words, the MTC terminal in this specification may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC-related operations. Alternatively, the MTC terminal may support enhanced coverage over the existing LTE coverage or a UE category / type defined in the existing 3GPP Release-12 or lower that supports low power consumption, or a newly defined Release-13 low cost low complexity UE category / type.

The wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data and the like. A wireless communication system includes a user equipment (UE) and a base station (BS, or eNB). The user terminal in this specification is a comprehensive concept of a terminal in wireless communication. It is a comprehensive concept which means a mobile station (MS), a user terminal (UT), an SS (User Equipment) (Subscriber Station), a wireless device, and the like.

A base station or a cell generally refers to a station that communicates with a user terminal and includes a Node-B, an evolved Node-B (eNB), a sector, a Site, a BTS A base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell.

That is, the base station or the cell in this specification is interpreted as a comprehensive meaning indicating a partial region or function covered by BSC (Base Station Controller) in CDMA, NodeB in WCDMA, eNB in LTE or sector (site) And covers various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, and small cell communication range.

Since the various cells listed above exist in the base station controlling each cell, the base station can be interpreted into two meanings. i) a device itself providing a megacell, a macrocell, a microcell, a picocell, a femtocell, or a small cell in relation to a wireless region, or ii) the wireless region itself. i indicate to the base station all devices that are controlled by the same entity or that interact to configure the wireless region as a collaboration. An eNB, an RRH, an antenna, an RU, an LPN, a point, a transmission / reception point, a transmission point, a reception point, and the like are exemplary embodiments of a base station according to a configuration method of a radio area. ii) may indicate to the base station the wireless region itself that is to receive or transmit signals from the perspective of the user terminal or from a neighboring base station.

Therefore, a base station is collectively referred to as a megacell, a macrocell, a microcell, a picocell, a femtocell, a small cell, an RRH, an antenna, an RU, a low power node (LPN), a point, an eNB, Quot;

Herein, the user terminal and the base station are used in a broad sense as the two transmitting and receiving subjects used to implement the technical or technical idea described in this specification, and are not limited by a specific term or word. The user terminal and the base station are used in a broad sense as two (uplink or downlink) transmitting and receiving subjects used to implement the technology or technical idea described in the present invention, and are not limited by a specific term or word. Here, an uplink (UL, or uplink) means a method of transmitting / receiving data to / from a base station by a user terminal, and a downlink (DL or downlink) .

There are no restrictions on multiple access schemes applied to wireless communication systems. Various multiple access schemes 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- Can be used. An embodiment of the present invention can be applied to asynchronous wireless communication that evolves into LTE and LTE-advanced via GSM, WCDMA, and HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB. The present invention should not be construed as limited to or limited to a specific wireless communication field and should be construed as including all technical fields to which the idea of the present invention can be applied.

A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

In a system such as LTE and LTE-A, the uplink and downlink are configured based on one carrier or carrier pair to form a standard. The uplink and the downlink are divided into a Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel, a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control Channel (EPDCCH) Transmits control information through the same control channel, and is configured with data channels such as PDSCH (Physical Downlink Shared CHannel) and PUSCH (Physical Uplink Shared CHannel), and transmits data.

On the other hand, control information can also be transmitted using EPDCCH (enhanced PDCCH or extended PDCCH).

In this specification, a cell refers to a component carrier having a coverage of a signal transmitted from a transmission point or a transmission point or transmission / reception point of a signal transmitted from a transmission / reception point, and a transmission / reception point itself .

The wireless communication system to which the embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-point transmission / reception system in which two or more transmission / reception points cooperatively transmit signals. antenna transmission system, or a cooperative multi-cell communication system. A CoMP system may include at least two multipoint transmission / reception points and terminals.

The multi-point transmission / reception point includes a base station or a macro cell (hereinafter referred to as 'eNB'), and at least one mobile station having a high transmission power or a low transmission power in a macro cell area, Lt; / RTI >

Hereinafter, a downlink refers to a communication or communication path from a multiplex transmission / reception point to a terminal, and an uplink refers to a communication or communication path from a terminal to a multiplex transmission / reception point. In the downlink, a transmitter may be a part of a multipoint transmission / reception point, and a receiver may be a part of a terminal. In the uplink, the transmitter may be a part of the terminal, and the receiver may be a part of multiple transmission / reception points.

Hereinafter, a situation in which a signal is transmitted / received through a channel such as PUCCH, PUSCH, PDCCH, EPDCCH, and PDSCH is expressed as 'PUCCH, PUSCH, PDCCH, EPDCCH and PDSCH are transmitted and received'.

In the following description, an indication that a PDCCH is transmitted or received or a signal is transmitted or received via a PDCCH may be used to mean transmitting or receiving an EPDCCH or transmitting or receiving a signal through an EPDCCH.

That is, the physical downlink control channel described below may mean a PDCCH, an EPDCCH, or a PDCCH and an EPDCCH.

Also, for convenience of description, EPDCCH, which is an embodiment of the present invention, may be applied to the portion described with PDCCH, and EPDCCH may be applied to the portion described with EPDCCH according to an embodiment of the present invention.

Meanwhile, the High Layer Signaling described below includes RRC signaling for transmitting RRC information including RRC parameters.

The eNB performs downlink transmission to the UEs. The eNB includes a physical downlink shared channel (PDSCH) as a main physical channel for unicast transmission, downlink control information such as scheduling required for reception of a PDSCH, A physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission in a Physical Uplink Shared Channel (PUSCH). Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

The following describes a small cell deployment scenario to which the proposals described in the present invention can be applied.

Figure A shows a general picture in the case of coexistence of small cell and macro cell. In figure 2 below, whether macro coverage is available, whether the small cell is for outdoor use, indoor use, dense, whether it is the same frequency spectrum as the macro in terms of spectrum or not.

Figure 2 shows a general representative drawing for the scenario of Figures B-2 ~ 5.

The scenario will be described with reference to Figs. 3 to 6. Fig.

Referring to FIG. 3, Scenario 1 is a co-channel deployment scenario of small cells and macro cells in the presence of an overlaid macro and is an outdoor small cell scenario.

Referring to FIG. 4, scenario 2a is a deployment scenario in which a small cell and a macro use different frequency spectrum in the presence of an overlaid macro, and is an outdoor small cell scenario.

Referring to FIG. 5, scenario 2b is a deployment scenario in which a small cell and a macro use different frequency spectrum in the presence of an overlaid macro, and is an indoor small cell scenario.

Referring to FIG. 6, scenario 3 is an indoor small cell scenario under the condition that macro coverage does not exist.

The frequencies F1 and F2 used in the various small cell scenarios in Figure A and B-1 to 5 above may be frequencies that support the same duplex mode, or F1 and F2 may have different duplex modes, for example F1 Can be considered to support FDD mode, F2 to support TDD mode, or vice versa.

Under the following carrier aggregation scenario, the corresponding F1 and F2 may be frequencies that support the same duplex mode, or F1 and F2 may consider frequencies that support different duplex modes.

When carrier aggregation is supported in the current specification, carrier aggregation is considered in each mode of FDD and TDD duplex mode. In case of considering carrier aggregation in the same duplex mode as FDD and TDD, The spec of the component is set to distinguish component carriers using the following definition.

√ Primary Cell (PCell)

  ■ When the CA is configured, the UE has one RRC connection with the network, one serving cell provides NAS mobility information at the time of RRC connection establishment / re-establishment / handover, and one at the time of RRC connection re-establishment / Lt; / RTI > provides a security input. These cells are referred to as primary cells (PCells). In the downlink, the carrier corresponding to the PCell is a downlink primary component carrier (DL PCC) and the uplink is an uplink primary component carrier (UL PCC).

  ■ Pcell can only be changed by handover procedure.

  ■ The Pcell is used for transmission of the PUCCH.

  ■ Unlike Scells, Pcell can not be de-activated.

  ■ Re-establishment is triggered when Pcell experiences RLF, not when Scell experiences RLF.

  ■ NAS information is obtained from Pcell.

√ Secondary Cells (SCells)

  ■ Depending on UE capability, SCells can be configured in the form of a set of serving cells with PCells. The carrier corresponding to the Scell in the downlink is the Downlink Secondary Component Carrier (DL SCC), and the carrier corresponding to the Scell in the uplink is the Uplink Secondary Component Carrier (UL SCC).

√ A set of serving cells composed of one terminal is composed of one or more scells with one PCell. The number of serving cells that can be configured depends on the aggregation capability of the terminal.

√ Reconfiguration, addition and removal of SCells can be performed by RRC, and RRC can reconfigure, add and remove SCells for use with target Pcell during intra-LTE handover. When adding a new scell, dedicated RRC signaling is used to transfer all required system information of the SCell. In Connected mode, the terminal does not need to get broadcasted system information directly from Scells.

Dual Connectivity

The following scenario is related to inter-node radio resource aggregation to improve the UE rate to UEs from different nodes under dual connectivity, and this involves merging radio resources via one or more eNBs for user plane data transmission.

Dual connectivity represents the operation of the RRC_CONNECTED terminal using radio resources provided by at least two different network points (Master eNB and Secondary eNBs) connected in a non-ideal backhaul. In dual connectivity, the master eNB represents an eNB that terminates the S1-MME and acts as a mobility anchor towards the core network (CN). The Master eNB may be referred to as MeNB or Macro eNB or Macrocell eNB. In dual connectivity, the secondary eNB is an eNB that provides additional radio resources for the UE, and represents an eNB other than the master eNB. The Secondary eNB may be referred to as SeNB or Small Cell eNB or Small eNB or Assisting eNB. At this time, the group of serving cells associated with MeNB is referred to as MCG (Master Cell Group), and the group of serving cells associated with SeNB is referred to as SCG (Secondary Cell Group).

SeNB has at least one special cell containing a PUCCH. That is, at least one cell in the SeNB has a configured uplink. And one of them is configured with a PUCCH resource (at least one cell in SeNB has been configured for UL and one of them is configured with PUCCH resources).

8 shows an example of a dual connectivity structure using radio resources provided by two base stations connected by a non-ideal backhaul. When dual connectivity is configured in the UE with the structure shown in FIG. 8, the UE can configure a specific data radio bearer as a dedicated BS bearer. For example, the UE may configure a specific radio bearer for voice service as a MeNB dedicated data radio bearer (MCG radio bearer) and a specific radio bearer for Internet service as a SeNB dedicated data radio bearer (SCG radio bearer) can do. For a specific MCG data radio bearer or a specific SCG radio bearer, only one base station has a PDCP entity, an RLC entity, and a MAC entity. The terminal has an entity in the terminal peered to the entity.

9 shows another example of a dual connectivity structure using radio resources provided by two base stations connected by a non-ideal backhaul. When dual connectivity is configured in the UE with the structure shown in FIG. 9, the UE can configure a specific data radio bearer (Split) through two base stations (MeNB and SeNB). Hereinafter, a bearer configured by separating through two base stations is referred to as a separate radio bearer (MCG-SCG radio bearer). For a specific separated data radio bearer, each base station has independent RLC entity (MeNB is MeNB RLC entity, SeNB is SeNB RLC entity) and MAC entity (MeNB is MeNB MAC entity and SeNB is SeNB MAC entity). The terminal has an entity in the terminal peered to the entity.

In this specification, a terminal establishes an RRC connection with a terminal, terminates a base station or a S1-MME that provides a cell (e.g., a Pcell) serving as a reference for handover, configures a mobility A base station serving as a mobility anchor is described as a master base station or a first base station.

The master base station or the first base station may be a base station that provides macrocells and may be a base station that provides any small cell in the case of a double connection between small cells.

Meanwhile, a secondary base station or a second base station, which is distinguished from the master base station in the double connection environment and provides additional radio resources to the terminal, is described as a secondary base station or a second base station.

The first base station (master base station) and the second base station (secondary base station) may each provide at least one cell to the terminal, and the first base station and the second base station may be connected through the interface between the first base station and the second base station. have.

In addition, for ease of understanding, a cell associated with a first base station may be referred to as a macro cell, and a cell associated with a second base station may be referred to as a small cell. However, in the small cell cluster scenario described below, the cell associated with the first base station may also be described as a small cell.

The macrocell in the present invention may mean at least one or more cells and may be written in the meaning of representing the entire cell associated with the first base station. Also, a small cell may mean at least one or more cells, and may be written in the meaning of representing the entire cell associated with the second base station. However, in a specific scenario, such as a small cell cluster as described above, it may be a cell associated with the first base station, in which case the cell of the second base station may be described as another small cell or another small cell.

However, in the following description of the embodiment, for convenience of description, it is possible to associate a macro cell with a master base station or a first base station, and associate a small cell with a secondary base station or a second base station, but the present invention is not limited thereto, The present invention is also applicable to a situation where a base station or a second base station can be associated with a macro cell and a master base station or a first base station is associated with a small cell.

LTE-U cell refers to a component carrier that performs LTE transmission in unlicensed spectrum or shared spectrum using unlicensed spectrum / shared spectrum or licensed assisted access method.

In the case of using LTE in unlicensed spectrum or shared spectrum, a scenario in which the corresponding LTE-U cell is bundled with the existing LTE cells in the form of carrier aggregation may be considered, or LTE-small cells and LTE-U cells may be bundled carrier aggregation, and scenarios that form dual connectivity with LTE cells covering existing macro coverage can be considered. Figure 10 is a reference picture depicting the CA and dual-connectivity scenarios mentioned.

- Licensed macro + licensed small cell + unlicensed small cell -> CA and DC

- Licensed macro + unlicensed small cell -> DC

- licensed small cell + unlicensed small cell -> CA

Scenarios considered for licensed assisted access include the following scenarios.

√ Scenario 1

  ■ Carrier aggregation between licensed macro cell (F1) and unlicensed small cell (F3)

√ Scenario 2

  ■ Carrier aggregation between licensed small cell (F2) and unlicensed small cell (F3) without macro coverage

√ Scenario 3

  ■ Licensed macro cells and small cells are deployed in (F1), and carrier aggregation between licensed small cell (F1) and unlicensed small cell (F3)

√ Scenario 4

  ■ Licensed macro cell (F1), licensed small cell (F2) and unlicensed small cell (F3)

  ■ Carrier aggregation between licensed small cell (F2) and unlicensed small cell (F3)

  ■ Carrier aggregation between ideal backhaul, macro cell (F1), licensed small cell (F2) and unlicensed small cell (F3) between macro cell and small cell

  ■ When dual connectivity is enabled, a scenario consisting of dual connectivity between macro cells and small cells

Fig. 11 is a diagram exemplifying scenario 4; Fig.

In the PHICH procedure currently used in 3GPP LTE / LTE-A, the transmission of the PHICH to the PUSCH in the CA is set to transmit the PHICH in the component carrier that transmitted the UL grant for the PUSCH, and the setting of the PHICH resource is set in the 36.213 spec The lowest PRB index assigned to the PUSCH and the cyclic shift value of the DMRS as shown in FIG.

In the case of carrier aggregation for more than 5 CCs, PHICH transmission can be transmitted on each component carrier in the case of self-scheduling, so no PHICH collision problem occurs. However, if cross-scheduling is configured on the UE, the PHICH should be transmitted in the CC where the UL grant is transmitted according to the current spec, and the cyclic shift value of the DMRS in case of considering 5 CCs in the existing CA The range is 8 and the allocation of the lowest PRB index of the PUSCH can be flexibly adjusted by scheduling to the base station. However, if the PUSCH is transmitted in five or more CCs, PHICH collision at the time of cross- There is a need for solutions. Accordingly, the present invention relates to a resource setting scheme for solving the PHICH collision in the case where the PUSCH is transmitted in five or more CCs and cross-carrier scheduling is configured, and related base station transmission and terminal receiving method. present.

The present invention is capable of configuring the CA and dual connectivity of an LTE cell and an LTE-U cell in an unlicensed band used in LTE / LTE-A, or in a carrier aggregation in five or more licensed and unlicensed bands Or if carrier aggregation is performed in less than 5 licensed bands and unlicensed bands, QoS and reliability of LTE-U cells in the licensed band and in the unlicensed band for data transmission and reception in the licensed band are secured. The present invention relates to a method of setting up and transmitting a feedback resource in a mobile station, and more particularly, to a method of transmitting and receiving a PHICH collision in a case where a PUSCH is transmitted in five or more CCs and cross- The present invention proposes a resource setting method for solving the problem and related base station transmission and receiving method of the terminal.

1) Scheduling of one PDCCH with extended CIF In case of performing cross-carrier scheduling for other CCs

12 is a view for explaining an embodiment of the present invention.

a) It may be considered to set the PHICH to be transmitted to the scell of the licensed carrier instead of the scheduling cell of one of the licensed carriers.

As an example of an implicit indication, a method of transmitting the PHICH on the licensed SCell having the lowest SCELL index may be considered, or a method of transmitting the PHICH on the licensed SCell having the lowest SCELL index among the scheduled cells may be considered have. As another embodiment, a method for transmitting the PHICH on the licensed SCell performing self-scheduling can be considered. If there are multiple licensed SCell's performing the self-scheduling, it can be transmitted through the licensed SCell with the lowest SCELL index, or the PHICH can be transmitted through the licensed SCELL with the small overhead of the PDCCH from the base station point, To the user.

As a method for allowing a base station to instruct a mobile station with an associated SCell index, a scheduling for a UL transmission is performed in order to support full flexibility so that the base station can independently set the base station independently for each subframe considering the PDCCH and PHICH overhead A method of dynamically assigning uplink control information (e.g., DCI) to be transmitted may be considered.

In the following indication method, semi-static designation can be made for the configuration of cell group and several carriers (or cells) by RRC configuration. Therefore, according to the cell configuration, the UE feedback A method of semi-static assignment of transmission cells through RRC configuration can be considered.

Another way to specify another SCELL index to a terminal is as a static method, where the configuration of a cell group and several carriers (or cells) can be specified in a specific deployment scenario or in a specific band specific , Unlicensed band, or specific combination of licensed band and unlicensed band), it is possible to transmit SIB information or fixed information to the transmission cell of UE feedback that each cell can transmit according to the cell configuration. A way to make it predefined, that is, to be static can be considered.

In the case of coexistence of licensed SCell and unlicensed SCell, that is, carrier aggregation between CCs on more than 5 licensed bands and CCs on unlicensed band, it is not possible to distinguish between transmission on CC and unlicensed band on licensed band, To avoid PHICH collision can be considered.

Or SCell on the licensed band and the SCell on the unlicensed band, so that the transmission of the SCIC on the unlicensed band can be performed in the same manner as the conventional SCELL transmission on the licensed band, a method of allowing the PHICH transmission to be performed in the CC on the band can be considered.

b) The PHICH-less transmission method can be considered for the PUSCH transmitted in the unlicensed band SCell.

For the PUSCH transmitted in the unlicensed band SCELL, the PHICH-less transmission method is considered in order to prevent the UE from performing the PHICH monitoring, and the related retransmission is expected to expect that the BS will transmit the UL grant through the PDCCH Method. Or the number of UL grants that have been scheduled by the base station can be known, so that the capacity of the PHICH can be more than 5 or more than 8, A method of setting not to monitor the PHICH may be considered.

c) Also, a method of bundling HARQ-ACK / NACK for the UL PUSCH to be transmitted on the PHICH may be considered.

For the corresponding HARQ-ACK / NACK bundling, the PHICH resource allocation procedure is basically followed for the five CCs, and HARQ-ACK / NACK bundling is performed for the further CCs to perform the PHICH transmission The method can be considered. As a more detailed embodiment, HARQ-ACK / NACK may be bundled without distinguishing between the SCell of the licensed band and the SCCH of the unlicensed band. In another embodiment, the SCell of the licensed band and the SCell of the unlicensed band A method of separately bundling HARQ-ACK / NACK for the PUSCH can be considered. This is because the information to be transmitted to the Scell of the licensed band may have a higher QoS requirement, so that the reliability of the information can be secured.

2) Multiple scheduling When cross-carrier scheduling is performed for other CCs from the CC

13 is a view for explaining another embodiment of the present invention.

In addition to a) to c), the number of scheduled cells related to scheduling is limited to 5 or 8 CCs in the environment of 2), and in the scheduling cell used in CA, A method of transmitting the PHICH for the PUSCH can be considered.

When LTE / LTE-A technology is applied to unlicensed band / shared spectrum, such as licensed assisted access, LTE / LTE-A technology used in the licensed spectrum, It is possible to secure the reliability of data by ensuring QoS for data transmission in the LTE-U cell, and to increase the uplink data transmission rate accordingly. In addition, PDCCH and PHICH control channel offloading It is possible to improve reliability through collision avoidance of the uplink / downlink control channel.

In case of supporting CA, inter-base station / AP / Transmission Point (TP) carrier aggregation and dual connectivity between base stations / APs / Transmission Points (TPs) performing data transmission using different spectrum types, By solving the ambiguity between the terminal and the base station about the behavior of the terminal operating according to the setting of the pcell and the scell that can be set between the base station / AP / TP that performs data transmission using different spectrum types, APs / TPs that perform data transmission using different spectrum types from the UE by accurately receiving the downlink control channel transmission including the link data transmission and the HARQ operation and the reception operation for the uplink data retransmission, Reliability can be ensured and the data transmission rate of the uplink / downlink can be increased.

FIG. 14 is a diagram illustrating a configuration of a base station according to another embodiment.

Referring to FIG. 14, a base station 1000 according to another embodiment includes a control unit 1010, a transmission unit 1020, and a reception unit 1030.

The control unit 1010 transmits a PUSCH to at least five CCs necessary for performing the above-described present invention, sets up a resource for solving a PHICH collision when cross-carrier scheduling is configured, Thereby controlling the overall operation of the base station.

The transmitting unit 1020 and the receiving unit 1030 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

15 is a diagram illustrating a configuration of a user terminal according to another embodiment of the present invention.

15, a user terminal 1100 according to another embodiment includes a receiving unit 1110, a control unit 1120, and a transmitting unit 1130.

The receiving unit 1110 receives downlink control information, data, and messages from the base station through the corresponding channel.

In addition, the controller 1120 transmits a PUSCH to at least five CCs necessary for carrying out the present invention described above, and includes a resource setting method for solving a PHICH collision when cross-carrier scheduling is configured, And controls the overall operation of the terminal according to the reception method.

The transmitter 1130 transmits uplink control information, data, and a message to the base station through the corresponding channel.

The standard content or standard documents referred to in the above-mentioned embodiments constitute a part of this specification, for the sake of simplicity of description of the specification. Therefore, it is to be understood that the content of the above standard content and some of the standard documents is added to or contained in the scope of the present invention, as falling within the scope of the present invention.

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

Claims (1)

A method for resolving a PHICH collision,
The transmission of the PUSCH is performed in five or more CCs and cross-carrier scheduling is set; And
And establishing and transmitting PHICH resources.

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