KR102085195B1 - Methods for transmitting and receiving pusch for coverage enhancement and apparatuses thereof - Google Patents

Abstract

The present invention provides a PUSCH transmission mode configuration method for extending TTI bundling that consists of four subframe units for coverage enhancement for PUSCH of a normal LTE / LTE-Advanced UE configured to receive DCI through PDCCH or EPDCCH, and A method of performing blind decoding on a PDCCH or an EPDCCH is proposed.

Description

Method and apparatus for transmitting / receiving uplink data channel for coverage extension TECHNICAL FIELD AND APPARATUSES THEREOF METHODS FOR TRANSMITTING AND RECEIVING PUSCH FOR COVERAGE ENHANCEMENT AND APPARATUSES THEREOF

The present embodiments relate to a method of transmitting and receiving uplink data for providing a streaming service such as voice and video in an LTE / LTE-Advanced system.

Two types of transmission modes may be configured in a base station for PUSCH transmission of a general LTE / LTE-Advanced terminal. A downlink control information format (DCI format) for PUSCH transmission resource allocation is determined according to the set transmission mode. Accordingly, the terminal performs blind decoding based on a DCI format configured through a common search space and a UE-specific search space.

Meanwhile, a semi-persistent scheduling (SPS) mechanism has been defined for efficient support for delay-sensitive real-time services such as voice and video in LTE / LTE-Advanced systems. Accordingly, any LTE / LTE-Advanced terminal may receive SPS activation / deactivation-related DCI in case of general LTE / LTE-Advanced terminal, SPS allocated for the terminal in common search space or UE-specific search space of PDCCH or EPDCCH. Decoding is performed based on the C-RNTI.

In this case, in order to improve the coverage of the PUSCH of the general LTE / LTE-Advanced UE configured to receive DCI through PDCCH or EPDCCH, there is no method of configuring a specific transmission mode and performing blind decoding.

An object of the present embodiments is a PUSCH transmission mode for extending TTI bundling consisting of four existing subframe units for coverage enhancement for PUSCH of a general LTE / LTE-Advanced UE configured to receive DCI through PDCCH or EPDCCH. There is provided a configuration method and a method of performing blind decoding on a PDCCH / EPDCCH accordingly.

In one aspect, the present invention, in the uplink data channel transmission and reception method for coverage extension, the base station to set the uplink data channel enhancement mode for improving the uplink data channel coverage of the terminal, the uplink data channel It provides a method comprising the step of configuring a first downlink control information format for a terminal in which the enhancement mode is set, and transmitting the first downlink control information format over a downlink control channel.

In another aspect, the present embodiment, in the uplink data channel transmission and reception method for coverage extension, setting a transmission mode for transmission of the uplink data channel, and if the transmission mode is an uplink data channel enhancement mode, Monitor the downlink control channel to receive the downlink control information format, and if the transmission mode is the uplink data channel normal mode, monitor the downlink control channel to receive the second downlink control information format. And receiving a first downlink control information format or a second downlink control information format through a downlink control channel.

In another aspect, the embodiments of the present invention, in the base station performing uplink data channel transmission and reception for coverage extension, sets an uplink data channel enhancement mode for uplink data channel coverage enhancement of a user equipment and uplink data channel enhancement. Provided is a base station including a control unit constituting a first downlink control information format for a terminal having a mode set therein, and a transmitting unit transmitting a first downlink control information format through a downlink control channel.

In another aspect, the present embodiment, in a terminal performing uplink data channel transmission and reception for coverage extension, sets a transmission mode for transmission of an uplink data channel, and if the transmission mode is an uplink data channel enhancement mode, 1 to monitor the downlink control channel to receive the downlink control information format, and to monitor the downlink control channel to receive the second downlink control information format if the transmission mode is the uplink data channel normal mode. Provided is a terminal including a control unit to perform and a receiving unit to receive a first downlink control information format or a second downlink control information format through a downlink control channel.

According to the embodiments, by setting the transmission mode for the PUSCH coverage enhancement of the general LTE / LTE-Advanced terminal and providing a specific method for performing blind decoding in the transmission mode, PUSCH coverage of the general LTE / LTE-Advanced terminal To improve.

1 to 4 are diagrams illustrating an example of blind decoding behavior in an uplink data channel transmission / reception method for coverage extension according to the present embodiments.
5 and 6 illustrate another example of blind decoding behavior in an uplink data channel transmission / reception method for coverage extension according to the present embodiments.
7 and 8 illustrate a process of an uplink data channel transmission and reception method for coverage extension according to the present embodiments.
9 is a diagram illustrating a configuration of a base station according to the present embodiments.
10 is a diagram illustrating a configuration of a user terminal according to the present embodiments.

Hereinafter, some embodiments of the present invention will be described in detail through 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 addition, in describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

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

In other words, in the present specification, the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations. Alternatively, in the present specification, the MTC terminal supports an enhanced coverage compared to the existing LTE coverage, or UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or supporting low power consumption). low complexity) can mean 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. The wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB). In the present specification, a user terminal is a generic concept meaning a terminal in wireless communication. In addition to user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.

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

In other words, in the present specification, a base station or a cell is a generic meaning representing some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell communication range.

Since the various cells listed above have a base station for controlling each cell, the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given radio area are controlled by the same entity or interact with each other to cooperatively configure the radio area to the base station. The eNB, RRH, antenna, RU, LPN, point, transmission / reception point, transmission point, reception point, etc., according to the configuration of the radio area, become an embodiment of the base station. In ii), the base station may indicate the radio area itself that receives or transmits a signal from a viewpoint of a user terminal or a neighboring base station.

Therefore, megacells, macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmit / receive points, transmit points, and receive points are collectively referred to as base stations. do.

In the present specification, the user terminal and the base station are used in a comprehensive sense as two transmitting and receiving entities used to implement the technology or technical idea described herein, and are not limited by the terms or words specifically referred to. The user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a comprehensive sense and are not limited by the terms or words specifically referred to. Here, the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal, the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.

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. One embodiment of the present invention may be applied to resource allocation in the field 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.

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.

In addition, in a system such as LTE and LTE-advanced, a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers. The uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like. Control information is transmitted through the same control channel, and data is composed of a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).

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

In the present specification, a cell means a component carrier having a coverage of a signal transmitted from a transmission or reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.

A wireless communication system to which embodiments are applied is a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal. antenna transmission system), a cooperative multi-cell communication system. The CoMP system may include at least two multiple transmission / reception points and terminals.

The multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an 'eNB') and a high transmit power or a low transmit power in the macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.

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

Hereinafter, a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.'

In addition, hereinafter, a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.

That is, the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.

In addition, for convenience of description, the EPDCCH which is an embodiment of the present invention may be applied to the portion described as the PDCCH, and the PDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.

Meanwhile, high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.

The eNB performs downlink transmission to the terminals. The eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required for receiving the PDSCH. For example, a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted. Hereinafter, the transmission and reception of signals through each channel will be described in the form of transmission and reception of the corresponding channel.

PUSCH transmission mode

In more detail, two types of transmission modes may be configured in a base station for PUSCH transmission of a general LTE / LTE-Advanced terminal, and a DCI format for PUSCH transmission resource allocation is determined according to the configured transmission mode. Accordingly, each terminal performs blind decoding based on a DCI format configured through a common search space and a UE-specific search space.

However, in the case of a bandwidth reduced low complexity (BL) / Coverage Enhancement (CE) terminal, a single transmission mode is defined to be supported, but a DCI format for each PUSCH transmission resource allocation is determined according to the CE mode of the corresponding terminal. Accordingly, blind decoding is performed based on the DCI format set through Type0-common search space or UE-specific search space, respectively.

VoLTE

Semi-persistent scheduling (SPS) mechanism has been defined for efficient support for delay-sensitive real-time services such as voice and video in LTE / LTE-Advanced systems. Accordingly, any LTE / LTE-Advanced UE can receive a Downlink Control Information (DCI) related to SPS activation / deactivation in case of a general LTE / LTE-Advanced UE in a common search space or UE-specific search space of PDCCH or EPDCCH. Decoding is performed based on the SPS C-RNTI allocated for the SPS, and in the case of the BL / CE UE, the SPS C also allocated for the UE in the Type0-common search space (CEmodeA only) or UE-specific search of the M-PDCCH. It is defined to perform decoding based on RNTI.

TTI bundling with synchronous HARQ

A synchronous non-adaptive HARQ operation has been defined as an HARQ operation scheme for PUSCH in LTE / LTE-Advanced system.

Accordingly, if any general LTE / LTE-Advanced UE is FDD (or PCell is FDD in case of CA configured UE), it is transmitted in downlink subframe after 4 subframes from uplink subframe in which PUSCH transmission is performed. It is defined to receive HARQ ACK / NACK for the UE through the PHICH, and when receiving the NACK through the PHICH PUSCH using the same radio resources as the first PUSCH transmission in the uplink subframe after 4 subframes therefrom Defined to perform retransmissions.

However, in case of TDD (or PCell in case of CA-configured UE, TDD), the synchronous non-adaptive HARQ operation method such as FDD is the same, but the first PUSCH is transmitted to UL / DL configuration of the corresponding TDD and According to the PHICH reception timing relationship, PHICH NACK and the corresponding retransmission timing relationship are defined.

However, in the case of coverage limited UE, TTI bundling that configures one HARQ entity with a plurality of TTIs is defined to improve the performance of the PUSCH serving as the coverage bottleneck. In this case, the corresponding TTI_BUNDLE_SIZE is defined as 4. In this case, one uplink TB is transmitted over four uplink subframes, four HARQ entities are configured, and each HARQ entity also performs synchronous non-adaptive based HARQ operation.

Accordingly, ACK / NACK feedback through PHICH for the corresponding bundled PUSCH transmission is transmitted through the fourth downlink subframe after the subframe based on the last PUSCH transmission (ie, the fourth subframe of the bundle). When the NACK is transmitted, retransmission of the PUSCH bundle is performed from the 9th or subsequent downlink subframe.

However, in rel-12, in order to reduce the delay of PUSCH bundling in consideration of SPS, a method of generating and operating three HARQ processes with one HARQ entity reduced when a corresponding PUSCH bundling is set, in this case, PHICH NACK and retransmission accordingly The timing gap between them is reduced to 5 subframes.

In Rel-13, repetition for PUSCH is applied as a coverage enhancement method for a BL / CE terminal, and according to a maximum PUSCH repetition number of transmission values configured through CE mode and RRC signaling and a repetition number setting value transmitted through DCI. The number of PUSCH repetition is determined. In addition, in the case of the rel-13 BL / CE terminal, an asynchronous adaptive HARQ operation for the PUSCH is defined. For this, DCI format 6-0A and DCI format 6, which are newly defined UL grant DCI formats for the corresponding rel-13 BL / CE terminal, are defined. Each -0B includes an information area for allocating an HARQ process number.

A specific UE procedure related to PUSCH transmission of a normal LTE / LTE-A UE and a rel-13 BL / CE UE shall be accompanied by extracting the document TS 36.213 of appendix [1].

The present invention provides a method for configuring a PUSCH transmission mode for extending TTI bundling consisting of four existing subframe units for coverage enhancement of a PUSCH of a normal LTE / LTE-A UE configured to receive DCI through a PDCCH or an EPDCCH. A method of performing blind decoding on a PDCCH or an EPDCCH is proposed.

Scheme 1.New transmission mode configuration

It is possible to define new PUSCH transmission modes other than the existing PUSCH transmission modes 1 and 2 for PUSCH coverage enhancement of normal LTE / LTE-Advanced UEs receiving DCI through PDCCH or EPDCCH.

For example, TM 0, which is a new PUSCH transmission mode for PUSCH coverage enhancement, may be defined. However, the present invention is not limited to the name of the new transmission mode.

As described above, the new PUSCH transmission mode TM 0 may be configured for each UE through UE-specific RRC signaling by the base station as in the existing TM 1 and TM 2, and accordingly, the existing UL grant DCI format for PUSCH resource allocation In addition to DCI format 0 or DCI format 4, a new DCI format N for the corresponding TM 0 may be defined.

Accordingly, when TM 0 is configured for an arbitrary LTE / LTE-Advanced terminal, the corresponding blind decoding behavior for receiving a UL grant may be defined as a corresponding terminal, respectively.

1 to 4 illustrate examples of blind decoding behavior in an uplink data channel transmission / reception method for coverage extension according to the present embodiments.

As a first embodiment of the blind decoding behaviour for the TM 0, the C-RNTI-based blind decoding behaviour, DCI format 0 in the common search space of the PDCCH in the same manner as the blind decoding behaviour of the mode 1 as shown in Table 1 of FIG. Based blind decoding is performed. In addition, as shown in Table 1A of FIG. 2, it may be defined to perform blind decoding based on DCI format 0 in a UE-specific search space of a PDCCH or an EPDCCH.

On the other hand, for the SPS C-RNTI based blind decoding behaviour, a new DCI format N based blind decoding behaviour such as Table 2 of FIG. 3 and Table 2A of FIG. 4 may be defined.

That is, when the transmission mode is set to TM 0 for coverage enhancement, the C-RNTI based blind decoding behavior is performed in the same manner as the blind decoding behavior of mode 1, and the SPS C-RNTI based blind decoding behavior is the new DCI format N. Based on the blind decoding behavior based on the scheme.

5 and 6 illustrate another example of blind decoding behavior in an uplink data channel transmission / reception method for coverage extension according to the present embodiments.

As another embodiment of the blind decoding behavior for the TM 0, the C-RNTI-based blind decoding behavior also uses the UE-specific search space of the PDCCH or EPDCCH as shown in Table 3 of FIG. 5 and Table 3A of FIG. 6. It may be defined to perform blind decoding based on DCI format N.

Even in this case, the blind decoding behaviour based on the SPS C-RNTI is to define the blind decoding behaviour based on the new DCI format N such as Table 2 of FIG. 3 and Table 2A of FIG. 4.

As another embodiment of the blind decoding behavior for the corresponding TM 0, the blind decoding of the DCI format 0, which is the fallback DCI format, is performed in the UE-specific search space of the PDCCH or the EPDCCH, respectively, for the two blind decoding behaviors described above. Instead, it may be defined to perform blind decoding only for DCI format N.

That is, a UE whose transmission mode is set to new TM 0 for coverage enhancement only performs monitoring on DCI format N for UE set to TM 0 in UE-specific search space of PDCCH or EPDCCH, and monitoring on DCI format 0 is performed. It can be disabled.

Even in this case, the C-RNTI based blind decoding follows the blind decoding behavior of the existing TM 1, performs DCI format 0 based blind decoding in the common search space of the PDCCH only for the SPS C-RNTI, and UE of the PDCCH or EPDCCH. In a specific search space, it may be defined to perform blind decoding based on DCI format N.

Alternatively, the blind decoding behavior of the C-RNTI is defined to perform blind decoding based on DCI format 0 in the common search space of the PDCCH and to perform blind decoding based on the DCI format N for the UE specific search space of the PDCCH or EPDCCH, similar to the SPS. can do.

In addition, the DCI format N is a DCI format 6-0A defined for rel-13 BL / CE UE, or a new DCI format (eg DCI format 7-0A, which may be defined for FeMTC under discussion in rel-14). However, the present invention is not limited to the corresponding name).

Alternatively, the modified DCI format 6-0A or modified DCI format 7-0A may be modified based on the corresponding DCI format 6-0A or DCI format 7-0A.

For example, the DCI format N is configured with the same information area as DCI format 6-0A or DCI format 7-0A, but the number of PUSCH repetitions according to the PUSCH repetition number is set to rel-13 BL / CE terminal or rel-. 14 may be defined to have a repeated transmission number different from the PUSCH repeated transmission number defined for the FeMTC UE.

Alternatively, the DCI format N may be defined in the form of modified DCI format 0 by additionally defining an information region for HARQ process number allocation or an information region for repetition number setting based on DCI format 0.

However, the method of configuring the DCI format N is only one embodiment, and all cases where the TM 0 based blind decoding behaviour is applied may be included in the scope of the present invention regardless of the configuration method of the DCI format N. have.

Scheme 2. Variable TTI_BUNDLE_SIZE configuration

As another method for PUSCH coverage enhancement, TTI_BUNDLE_SIZE defined as 4 may be defined such that the base station sets semi-statically through UE-specific or cell-specific RRC signaling. In this case, the terminal configured with TTI bundling performs TTI bundling based on the default value (= 4) if there is no new value according to whether additional TTI_BUNDLE_SIZE is additionally set, and if there is a new setting value, the TTI bundling based on the setting value. To do this.

7 and 8 illustrate a process of an uplink data channel transmission and reception method for coverage extension according to the embodiments.

7 illustrates an example of an operation of a base station by an uplink data channel transmission and reception method for coverage extension according to the present embodiments.

Referring to FIG. 7, the base station according to the present embodiments sets a new transmission mode for PUSCH coverage enhancement of an LTE / LTE-Advanced terminal (S700).

The new transmission mode for PUSCH coverage enhancement of the LTE / LTE-Advanced terminal is a transmission mode that is set separately in addition to the existing PUSCH transmission modes 1 and 2, and may be defined as, for example, transmission mode 0, but the name is not limited.

The base station may configure a new PUSCH transmission mode TM 0 for each terminal through UE-specific RRC signaling by the base station like the existing TM 1 and TM 2.

The base station configures a first downlink control information format for PUSCH resource allocation for a terminal configured to TM 0, which is a new PUSCH transmission mode (S710).

Here, the first downlink control information format may be a DCI format for PUSCH resource allocation for a terminal configured as TM 0, and may be a DCI format (eg, DCI format N) defined separately from the existing DCI format. Or, based on the existing DCI format, it may be a DCI format (eg, DCI format 0C) additionally defining an information area for HARQ process number assignment or an information area for repetition number setting.

The base station transmits the first downlink control information format for PUSCH resource allocation of the terminal set to TM 0 for coverage enhancement to the terminal (S720), so that the terminal for PUSCH coverage enhancement may perform TM 0 based blind decoding. Make sure

8 illustrates an example of an operation of a terminal by an uplink data channel transmission / reception method for coverage extension according to the present embodiments.

Referring to FIG. 8, the terminal according to the present embodiments sets a transmission mode for PUSCH transmission (S800).

The PUSCH transmission mode of the terminal may be set through UE-specific RRC signaling by the base station.

The PUSCH transmission mode of the terminal may be a transmission mode (general mode, TM 1, 2) for a general LTE / LTE-Advanced terminal, or a transmission mode (enhanced mode, TM 0) for a coverage enhanced LTE / LTE-Advanced terminal. .

When the transmission mode of the terminal is set to TM 0 for PUSCH coverage enhancement, the terminal monitors the first downlink control information format through the downlink control channel (S820).

Here, the first downlink control information format may be a DCI format for PUSCH resource allocation for a terminal configured as TM 0, and may be a DCI format (eg, DCI format N) defined separately from the existing DCI format. Or, based on the existing DCI format, it may be a DCI format (eg, DCI format 0C) additionally defining an information area for HARQ process number assignment or an information area for repetition number setting.

When the transmission mode of the terminal is set to the general transmission mode, the terminal monitors the second downlink control information format through the downlink control channel (S830).

That is, if the transmission mode is set to TM 0, the UE configured for TMSCH defined for PUSCH coverage enhancement is configured for a second downlink control information format (eg, DCI format 0) that is a fallback DCI format in a UE-specific search space. The blind decoding is not performed, and the blind decoding is performed only on the first downlink control information formats (eg, DCI format N and DCI format 0C).

Accordingly, according to the present embodiments, by defining a new transmission mode for a general LTE / LTE-Advanced terminal, and providing a specific blind decoding behavior of the terminal in which the transmission mode for coverage enhancement is set, to improve the PUSCH coverage of the terminal To help.

9 is a diagram illustrating a configuration of a base station 900 according to the present embodiments.

Referring to FIG. 9, the base station 900 according to the present embodiments includes a controller 910, a transmitter 920, and a receiver 930.

The controller 910 controls the overall operation of the base station 900 required to set a new PUSCH transmission mode for PUSCH coverage extension and perform blind decoding behavior according to the above-described present invention.

The transmitter 920 and the receiver 930 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.

10 is a diagram illustrating a configuration of a user terminal 1000 according to the present embodiments.

Referring to FIG. 10, the user terminal 1000 according to the present exemplary embodiments includes a receiver 1010, a controller 1020, and a transmitter 1030.

The receiver 1010 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the controller 1020 controls the overall operation of the user terminal 1000 by setting a new PUSCH transmission mode for PUSCH coverage expansion and performing blind decoding according to the above-described present invention.

The transmitter 1030 transmits uplink control information, data, and a message to a base station through a corresponding channel.

The standard contents or standard documents mentioned in the above embodiments are omitted to simplify the description of the specification and form a part of the present specification. Accordingly, the addition of the contents of the above standard and part of the standard documents to the specification or the description in the claims should be interpreted as falling within the scope of the present invention.

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

Claims (20)

In the uplink data channel transmission and reception method for coverage extension,
Setting, by the base station, an uplink data channel enhancement mode for improving uplink data channel coverage of the terminal;
Configuring a first downlink control information format for a terminal in which the uplink data channel enhancement mode is set; And
Transmitting the first downlink control information format over a downlink control channel;
The terminal in which the uplink data channel enhancement mode is set performs monitoring of the first downlink control information format through a terminal specific search space, and the second downlink control information for the terminal in which the uplink data channel general mode is set No monitoring of the format.
The method of claim 1,
The uplink data channel enhancement mode is configured through terminal specific higher layer signaling.
The method of claim 1,
The first downlink control information format includes a hybrid automatic retransmission request process number and an iteration number.
delete The method of claim 1,
The first downlink control information format is configured by adding a hybrid automatic retransmission request process number and a repetition number to the second downlink control information format.
In the uplink data channel transmission and reception method for coverage extension,
Setting a transmission mode for transmission of an uplink data channel;
When the transmission mode is an uplink data channel enhancement mode, monitoring is performed on a downlink control channel to receive a first downlink control information format; and when the transmission mode is an uplink data channel general mode, second downlink control information Performing monitoring on the downlink control channel to receive a format; And
Receiving the first downlink control information format or the second downlink control information format through the downlink control channel;
The terminal in which the uplink data channel enhancement mode is set does not monitor the second downlink control information format through a terminal specific search space, but monitors only the first downlink control information format.
The method of claim 6,
The uplink data channel enhancement mode is configured through terminal specific higher layer signaling.
The method of claim 6,
The first downlink control information format includes a hybrid automatic retransmission request process number and an iteration number.
delete The method of claim 6,
The first downlink control information format is configured by adding a hybrid automatic retransmission request process number and a repetition number to the second downlink control information format.
In the base station performing uplink data channel transmission and reception for coverage extension,
A control unit configured to set an uplink data channel enhancement mode for improving uplink data channel coverage of the terminal and to configure a first downlink control information format for the terminal in which the uplink data channel enhancement mode is set; And
A transmitter for transmitting the first downlink control information format through a downlink control channel;
The terminal in which the uplink data channel enhancement mode is set performs monitoring of the first downlink control information format through a terminal specific search space, and the second downlink control information for the terminal in which the uplink data channel general mode is set Base station that does not monitor the format.
The method of claim 11,
The uplink data channel enhancement mode is a base station configured through terminal specific higher layer signaling.
The method of claim 11,
The first downlink control information format includes a hybrid automatic retransmission request process number and a repetition number.
delete The method of claim 11,
The first downlink control information format is configured by adding a hybrid automatic retransmission request process number and a repetition number to the second downlink control information format.
In the terminal performing uplink data channel transmission and reception for coverage extension,
Set a transmission mode for transmission of an uplink data channel, if the transmission mode is an uplink data channel enhancement mode, monitor a downlink control channel to receive a first downlink control information format, and transmit the transmission mode A control unit configured to monitor the downlink control channel to receive a second downlink control information format if is an uplink data channel normal mode; And
And a receiver configured to receive the first downlink control information format or the second downlink control information format through the downlink control channel.
The terminal in which the uplink data channel enhancement mode is set, does not perform monitoring of the second downlink control information format through a terminal specific search space, and performs monitoring only of the first downlink control information format.
The method of claim 16,
The uplink data channel enhancement mode is configured through terminal specific higher layer signaling.
The method of claim 16,
The first downlink control information format includes a hybrid automatic retransmission request process number and a repetition number.
delete The method of claim 16,
The first downlink control information format is configured by adding a hybrid automatic retransmission request process number and a repetition number to the second downlink control information format.

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