KR20180108429A - Method for transmitting and receiving PUSCH for MTC UEs based on sub-PRB and Apparatus thereof - Google Patents

Abstract

An embodiment of the present invention relates to a method for transmitting and receiving a physical uplink shared channel (PUSCH) for a machine type communication (MTC) terminal in a 3GPP LTE/LTE-A system which can improve spectral efficiency for an uplink of an MTC terminal. The method for transmitting a PUSCH by an MTC terminal comprises the following steps of: receiving PUSCH resource allocation information of a partial physical resource block (sub-PRB) unit from a base station; and transmitting the PUSCH to the base station based on the PUSCH resource allocation information.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for transmitting and receiving an uplink data channel based on a partial physical resource block for a MTC terminal,

The present embodiment proposes a method of transmitting and receiving a Physical Uplink Shared Channel (PUSCH) for a MTC (Machine Type Communication) terminal in a 3GPP LTE / LTE-A system, And DCI (Downlink Control Information). In particular, to improve the spectral efficiency, we propose a method for PUSCH resource allocation on a sub-PRB basis.

As the LTE network spreads, mobile operators want to minimize the number of Radio Access Terminals (RATs) to reduce network maintenance costs. However, the conventional MTC products based on the GSM / GPRS network are increasing, and the GSM / GPRS network has an advantage that it can provide the MTC using the low data rate at a low cost.

Therefore, since the mobile communication service provider uses the LTE network for the general data transmission and uses the GSM / GPRS network for the MTC, there arises a problem that the two RATs must be operated separately. This is an inefficient use of the frequency band, There is a problem that burdens the business.

Therefore, in order to reduce the cost of the UE in comparison with the existing normal LTE UE, the transmission / reception bandwidth of the UE is limited to 6 PRBs (Physical Resource Blocks), and the number of transmission / reception antennas is limited to one. Reduced complexity A CE UE with Coverage Enhancement (CE) mode in consideration of an MTC application scenario such as smart metering installed in a deep indoor environment such as a UE and a cellar And a technology for supporting the BL / CE terminal, that is, the MTC terminal, is defined in LTE.

In this case, if the method used by the existing LTE terminal for the uplink data channel of the MTC terminal is used as it is, an uplink data channel with an excessively large bandwidth is assigned to the transmission / There is a problem that the spectral efficiency is lowered.

It is an object of the present embodiments to provide a concrete method for transmission and reception of an uplink data channel that can improve the spectral efficiency of the uplink of the MTC terminal.

According to an embodiment of the present invention, a method for transmitting an uplink data channel (PUSCH) by a MTC terminal includes transmitting uplink data channel resource allocation information for a partial physical resource block (sub-PRB) And transmitting the uplink data channel to the base station based on the uplink data channel resource allocation information.

In an exemplary embodiment of the present invention, a method for receiving an uplink data channel (PUSCH) in a base station includes transmitting uplink data channel resource allocation information for a partial physical resource block (sub-PRB) And receiving an uplink data channel configured based on the data channel resource allocation information from the MTC terminal.

In an exemplary embodiment of the present invention, an MTC terminal for transmitting an uplink data channel (PUSCH) includes a receiver for receiving uplink data channel resource allocation information for a partial physical resource block (sub-PRB) And a transmitter for transmitting the uplink data channel to the base station based on the resource allocation information.

In an exemplary embodiment of the present invention, there is provided a method of receiving a uplink data channel (PUSCH) by a base station, the method comprising: a transmitter for transmitting uplink data channel resource allocation information for a partial physical resource block (sub- And a receiving unit receiving the uplink data channel configured based on the data channel resource allocation information from the MTC terminal.

According to the present embodiments, it is possible to provide a concrete method for transmission and reception of the uplink data channel that can improve the spectral efficiency of the uplink of the MTC terminal.

1 is a diagram illustrating a procedure for transmitting an uplink data channel by a UE in the present embodiment.
FIG. 2 is a diagram illustrating a procedure for a base station to receive a uplink data channel in the present embodiment.
3 is a diagram illustrating an example of transmitting uplink data channel resource allocation information to an MS through RRC signaling in this embodiment.
FIG. 4 is a diagram illustrating an example of transmitting uplink data channel resource allocation information to the UE through the DCI in the present embodiment.
5 is a diagram illustrating a configuration of a base station according to the present embodiments.
FIG. 6 is a diagram illustrating a configuration of a terminal according to the present embodiments.

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. In this specification, the MTC terminal supports the enhanced coverage over the existing LTE coverage, or the UE category / type defined in the existing 3GPP Release-12 or lower that supports the low power consumption, or the 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) the device itself providing a megacell, macrocell, microcell, picocell, femtocell, small cell in relation to the wireless region, or ii) indicating 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 base station, collectively referred to as a megacell, macrocell, microcell, picocell, femtocell, small cell, RRH, antenna, RU, low power node do.

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 systems such as LTE and LTE-advanced, a standard is constructed by configuring uplink and downlink based on a single carrier or carrier pair. 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 transmit and receive 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 multipoint transmission / reception point to a terminal, and an uplink refers to a communication or communication path from a terminal to a multiple 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.

[CE mode definition]

In LTE, two modes are defined as coverage enhancement modes for BL / CE terminals: CEModeA and CEModeB. CEModeA is a terminal operation mode in which repetition transmission for a wireless channel such as MPDCCH, PDSCH, PUSCH, PUCCH, etc. for applying coverage improvement of a BL / CE terminal is not applied or a repetition transmission of a small number is applied , And CEModeB is a terminal operating mode for applying a large number of repetitions to the wireless channels to improve coverage. The CE mode is defined to be signaled so that it can be set for each terminal.

[ Narrowband  definition ]

개의 하향 링크 협대역(narrowbands) 및

개의 상향 링크 협대역(narrowbands)이 구성되었다. 단, 임의의 시스템 대역폭에서 상기의 협대역(narrowband) 구성 시, 해당 시스템 대역폭을 구성하는 전체 PRB의 수를 6으로 나눈 나머지에 해당하는 remaining RB(s)에 대해, 해당 remaining RB(s)를 시스템 대역의 양쪽 밴드의 가장자리(edge)에 균등(even)하게 두거나(시스템 대역폭이 짝수의 PRBs로 구성된 경우), 또는 시스템 대역의 센터(시스템 대역이 25 PRBs로 구성된 경우), 또는 양 edge와 시스템 대역의 센터(시스템 대역이 15 PRBs, 75 PRBs인 경우)에 각각 위치시키고, 이를 제외한 PRBs를 이용해 increasing PRB number로 6개 연속적인 PRBs를 묶어서 상기의 협대역(narrowband)를 구성하도록 할 수 있다.As described above, in the case of the BL / CE terminal, data can be transmitted / received only at 1.4 MHz (i.e., 6 PRBs) through arbitrary subframes regardless of the system bandwidth. As a result, a transmission band of an arbitrary BL / CE terminal is defined in an arbitrary uplink / downlink subframe, and a narrowband consisting of 6 consecutive PRBs is defined as a unit for allocating the bandwidth, follow

The number of downlink narrowbands and

Uplink narrowbands have been constructed. However, in the narrowband configuration in the arbitrary system bandwidth, the remaining RB (s) corresponding to the remainder obtained by dividing the total number of PRBs constituting the corresponding system bandwidth by six is used as the remaining RB (s) (Even if the system bandwidth consists of PRBs), or the center of the system band (if the system band consists of 25 PRBs), or both edges of the system band The PRBs may be located in the center of the band (when the system band is 15 PRBs or 75 PRBs), and the PRBs excluding the PRBs may be used to form the narrowband by grouping six consecutive PRBs into increasing PRB numbers.

Specifically, the narrowband configuration method can be defined as follows.

Downlink Narrowband ( Downlink narrowbands )

The narrowband is defined as six non-overlapping consecutive physical resource blocks in the frequency domain. (A narrowband is defined as six non-overlapping consecutive physical resource blocks in the frequency domain.) [ The total number of narrow bands is determined as follows: (total number of downlink narrowbands in the downlink transmission bandwidth configured in the cell is given by)

로 넘버링되는데 이 때 협대역

는 ㅇ아래와 같은 PRB 인덱스들로 구성된다.(The narrowbands are numbered

in order of increasing physical resource-block number where narrowband

is composed of physical resource-block indices)Narrow bands are arranged in increasing order of increasing PRB number

Lt; RTI ID = 0.0 > narrowband &

Is composed of the following PRB indexes (The narrowbands are numbered

in order of increasing physical resource-block number where narrowband

is composed of physical resource-block indices)

where

Uplink Narrowband ( Uplink narrowbands )

The narrowband is defined as six non-overlapping consecutive physical resource blocks in the frequency domain. (A narrowband is defined as six non-overlapping consecutive physical resource blocks. The total number of narrow bands is determined as follows: (The total number of uplink narrow bands in the uplink transmission bandwidth configured in the cell is given by)

로 넘버링되는데 이 때 협대역

는 ㅇ아래와 같은 PRB 인덱스들로 구성된다.(The narrowbands are numbered

in order of increasing physical resource-block number where narrowband

is composed of physical resource-block indices)Narrow bands are arranged in increasing order of increasing PRB number

Lt; RTI ID = 0.0 > narrowband &

Is composed of the following PRB indexes (The narrowbands are numbered

in order of increasing physical resource-block number where narrowband

is composed of physical resource-block indices)

where

[Resource allocation and DCI  format for BL / CE UE ]

According to the PDSCH and PUSCH resource allocation method for the BL / CE terminal, when a certain base station constructs a DCI including PDSCH or PUSCH resource allocation information for an arbitrary BL / CE terminal, a PDSCH Or PUSCH transmission is defined to include narrowband index information and RB allocation information within the narrowband for PRB (or VRB) allocation.

In addition, the RB allocation information in the narrowband is made up of a continuous VRB resource allocation scheme, and thus, based on the resource allocation type 2 for the PDSCH and the resource allocation type 0 (for the PUSCH) resource allocation type 0). However, in the case of PUSCH, resource allocation can be performed based on resource allocation type 2 only for a BL / CE terminal in which CEModeB is set.

In this embodiment, a method for supporting partial resource block (sub-PRB) unit resource allocation is proposed as a method for improving the spectral efficiency of the uplink compared to the BL / CE terminal.

A frequency resource allocation unit for PUSCH transmission of a conventional BL / CE UE or a non-BL UE to which a CE mode is applied is made in units of 1 RB, and accordingly a resource allocation type 0 ((CEMODE) RB resource allocation in a narrowband is performed through DCI format 6-0A based on resource allocation type 0) and DCI format 6-0B based on resource allocation type 2 (resource allocation type 2).

In this embodiment, as a method for improving the spectral efficiency of the PUSCH, a partial physical resource block (sub-PRB (eg 3) smaller than the physical resource block (PRB) A subcarrier) sub-carrier) resource allocation.

The embodiments described below can be applied to a terminal, a base station, and a core network entity (MME) using all mobile communication technologies. For example, the present embodiments can be applied not only to mobile communication terminals to which LTE technology is applied but also to next generation mobile communication (5G mobile communication, New-RAT) terminals, base stations, and access and mobility functions (AMFs).

The partial physical resource block (sub-PRB) described in this embodiment is different from the physical resource block (PRB) composed of 12 subcarriers, and includes 12 or fewer subcarriers (for example, 3, 4, or 6 (The number of subcarriers). (However, the present embodiment is not limited by the name.)

Hereinafter, a more specific embodiment of a method for transmitting and receiving an uplink data channel (PDSCH) between a mobile station and a base station will be described in detail.

The embodiments described below may be applied individually or in any combination.

Example  1: partial physical resource block (sub- PRB ) Based resource allocation settings

The PUSCH resource allocation mode for a BL / CE terminal in which a certain base station / cell / transmission / reception point is scheduled through the MPDCCH or a non-BL terminal in which the CE mode is established is called UE-specific or cell- ) Higher layer signaling.

As a method for setting the PUSCH resource allocation mode, the PUSCH resource allocation mode is a DCI format (e.g., DCI format 6-0A, 6-0B, etc) to which an existing physical resource block (PRB) .) Based PUSCH resource allocation or a new DCI format based PUSCH resource allocation based on a newly defined partial physical resource block (sub-PRB). However, the setting can be made through the PUSCH transmission mode setting.

That is, Mode 1 is defined as a PUSCH transmission mode for a UE that is scheduled through an existing MPDCCH, but a new Mode 2 is defined, and Mode 2 is defined as a PUSCH based on a partial physical resource block (sub-PRB) It can be defined to mean a transmission mode.

(PRB) unit PUSCH resource allocation mode and a partial physical resource block (sub-PRB) unit PUSCH resource allocation mode independently of the PUSCH transmission mode setting Specific base station / cell / transmission / reception point sets a PUSCH resource allocation mode for an arbitrary terminal to directly transmit the UE-specific or cell-specific higher layer signaling signaling).

As another method for setting the PUSCH resource allocation mode, a new CE mode (eg CEModeC) for PUSCH transmission and reception based on a partial physical resource block (sub-PRB) is defined and a partial physical resource block sub-PRB) based PUSCH resource allocation can be defined.

A PUSCH resource allocation mode for a BL / CE terminal in which an arbitrary base station / cell / transmission / reception point is scheduled through the MPDCCH or a non-BL terminal in which the CE mode is established can be dynamically signaled through the DCI . That is, an information area for setting a resource grid type (PRB vs. sub-PRB) for frequency resource allocation in a DCI format for PUSCH resource allocation is defined, and a resource allocation ) Information area is set based on an existing PRB or a partial physical resource block (sub-PRB) based on the PRB information.

Example  2: partial physical resource block (sub- PRB ) How to allocate resources

Example  2-1

A method for allocating a PUSCH resource for a partial physical resource block (sub-PRB) for a non-BL UE with a BL / CE UE or a CE mode, The size (the number of contiguous subcarriers) of the granularity, that is, the partial physical resource block (sub-PRB), is UE-specific or cell- ) Semi-static through higher layer signaling and sets granularity-based frequency resource allocation information of a partial physical resource block (sub-PRB) established through the DCI . ≪ / RTI >

More specifically, as a partial physical resource block (sub-PRB) for PUSCH resource allocation, a granule size of three types of partial physical resource blocks (sub-PRBs) each consisting of three subcarriers, four subcarriers, When the granularity is supported, the base station allocates a partial physical resource block (sub-resource block) for an arbitrary terminal through UE-specific or cell-specific higher layer signaling, -PRB) is set.

When the type of the partial physical resource block (sub-PRB) is set through the higher layer signaling, the partial physical resource block (sub-PRB) set in the narrowband, (Narrowband allocation information + partial physical resource block (sub-PRB) index allocation) through the UL grant DCI for PUSCH resource allocation, Information} is transmitted. For example, if three subcarrier based types of partial physical resource blocks (sub-PRBs) are defined, three consecutive non-overlapping subcarriers are allocated on a narrowband of 6 PRBs (4 * 6 = 24 partial physical resource blocks (sub-PRBs) consisting of the highest frequency sub-resource blocks (sub-PRBs) Indexing from 0 to 23 can be performed in order from the lowest frequency (PRB), or indexing is performed from 0 to 23 in order from the lowest frequency partial physical resource block (sub-PRB) .

Accordingly, the UL grant DCI format includes the narrowband allocation information and the sub-PRB allocated to the PUSCH transmission among 0 to 23 partial physical resource blocks (sub-PRBs) Index information can be defined to be transmitted.

Or indexing of a partial physical resource block (sub-PRB) according to the type of the partial physical resource block (sub-PRB) may be defined to be performed in one PRB unit. That is, when the types of the sub-PRBs based on three subcarriers are defined as in the above example, one PRB is divided into three consecutive non-overlapping subcarriers (Sub-PRBs) having the highest frequency can be indexed from 0 to 3 in order from the highest frequency sub-physical resource block (sub-PRB) Indexing can be performed from 0 to 3 in order from the lowest frequency sub-physical resource block (sub-PRB). In this case, the PUSCH resource allocation information transmitted through the UL grant DCI includes {narrowband allocation information + PRB index allocation information within the corresponding narrowband + partial physical resource block within the corresponding PRB ) Index allocation information}.

Example  2-2

Another method for PUSCH resource allocation of a partial physical resource block (sub-PRB) unit for a non-BL UE with a BL / CE UE or a CE mode is a method for allocating a partial physical resource block (sub-PRB) The granularity, that is, the size of the partial physical resource block (sub-PRB) and the granularity-based PUSCH resource allocation information of the corresponding partial physical resource block (sub-PRB) Can be defined to be dynamic.

As an example of this, as described above, three types of partial physical resource blocks (sub-PRBs) of three subcarriers, four subcarriers, and six subcarriers are allocated as sub-PRBs for PUSCH resource allocation When granularity is supported, it can be defined to include an information area for directly indicating the type of sub-physical resource block (sub-PRB) through the UL grant DCI.

Accordingly, an arbitrary base station / cell / transmission / reception point and a UE can allocate a PUSCH resource allocation through the corresponding UL grant to three subcarriers in accordance with an information region indicating a type of a corresponding partial physical resource block (sub-PRB) PRBs based on a partial physical resource block (sub-PRB) or a partial physical resource block (sub-PRB) composed of four subcarriers or six subcarriers, The type of the partial physical resource block (sub-PRB) serving as the resource allocation unit through the resource allocation information area in the UL grant can be defined to be determined.

However, resource allocation for a partial physical resource block (sub-PRB) through the corresponding resource allocation information area is not limited to narrowband allocation information + narrowband allocation information as in the above- (Sub-PRB) index allocation information in the partial physical resource block (sub-PRB) index allocation information in the partial physical resource block (PRB index allocation information) + PRB index allocation information (narrowband allocation information) .

Or the type of the partial physical resource block (sub-PRB) may be implicitly determined through resource allocation setting in the UL grant. As an example of this, the resource allocation information region may be composed of {narrowband allocation information + partial physical resource block (sub-PRB) allocation information within a narrowband} The type and index of the partial physical resource block (sub-PRB) for transmission of the corresponding PUSCH are determined to be determined by a table mapping method in accordance with the partial physical resource block (sub-PRB) allocation information setting in the narrowband .

For example, the partial physical resource block (sub-PRB) allocation information within the corresponding narrowband can be defined to a total of 0 to 53, and from 0 to 23, the narrowband can be divided into consecutive (4 * 6 = 24) partial physical resource blocks (sub-physical resource blocks) constituting the corresponding narrowband when constituted by partial physical resource blocks (sub-PRBs) composed of three non-overlapping subcarriers PRB) of the allocated sub-physical resource blocks (sub-PRBs), and similarly, the narrow band is defined as continuous non-overlapping four subcarriers (3 * 6 = 18) subcarrier-based partial physical resource blocks (sub-PRBs) constituting the narrowband, To indicate the index of the partial physical resource block (sub-PRB), and finally , The narrowband is composed of six non-overlapping sub-carrier-based partial physical resource blocks (sub-PRBs) ranging from 42 to 53, PRBs allocated among partial physical resource blocks (sub-PRBs) of 2 * 6 = 12 6 subcarriers based on the total number of sub-physical resource blocks (sub-PRBs).

As another example of this, a resource allocation information area is defined to be composed of {narrowband allocation information + PRB index allocation information + partial physical resource block (sub-PRB) allocation information in PRB} The type and index of the partial physical resource block (sub-PRB) for transmission of the corresponding PUSCH can be defined to be determined by a table mapping method according to the partial physical resource block (sub-PRB) allocation information setting in the corresponding PRB .

For example, the partial physical resource block (sub-PRB) allocation information in the corresponding PRB can be defined to a total of 0 to 8, and 0 to 3 can be defined as {narrowband allocation information + PRB index allocation information }, When the PRBs allocated to the PRBs are configured as continuous non-overlapping three subcarrier-based partial physical resource blocks (sub-PRBs), a total of four partial physical resource blocks sub-PRBs allocated to the sub-PRBs, and similarly, the allocated PRBs are allocated to 4 to 6 consecutive non-overlapping subcarrier based parts PRBs are allocated to indicate the indexes of allocated partial physical resource blocks (sub-PRBs) among a total of three partial physical resource blocks (sub-PRBs) constituting the corresponding PRB, Finally, the allocated PRBs 7 through 8 are divided into consecutive non-overlapped (PRB) sub-PRBs among a total of two partial physical resource blocks (sub-PRBs) constituting a corresponding PRB, Quot;) < / RTI >

Although the number of subcarriers constituting the partial physical resource block (sub-PRB) is described as 3, 4, and 6 in the above-described embodiment, the number of subcarriers of all natural numbers smaller than 12 It is obvious that the present embodiment can be applied to the type of all partial physical resource blocks (sub-PRBs) having the partial physical resource block (sub-PRB).

1 is a diagram illustrating a procedure for transmitting an uplink data channel by a UE in the present embodiment.

Referring to FIG. 1, a UE may receive uplink data channel resource allocation information for a partial physical resource block (sub-PRB) unit from a base station (S100).

At this time, the uplink data channel resource allocation information is configured based on the frequency interval setting information of the partial physical resource block (sub-PRB) unit.

At this time, the UE can receive uplink data channel resource allocation information through UE-specific or cell-specific higher layer signaling (e.g., RRC signaling) have. Alternatively, the UE may receive the uplink data channel resource allocation information through the DCI. Hereinafter, an example in which uplink data channel resource allocation information is transmitted to the UE using RRC signaling or DCI in FIG. 3 and FIG. 4 will be described.

At this time, the number of subcarriers that can constitute the partial physical resource block (sub-PRB) can be selected from arbitrary constants equal to or less than 12, but only constants satisfying specific conditions can be selected from sub- The number of subcarriers that can constitute the subcarrier can be set.

For example, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) can be selected as one of the elements of the set consisting of all or part of the divisors of 12. For example, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) may be one of {1,2,3,4,6} which is a divisor of 12, {1,2,3 , 4,6}, which is a subset of {3,4,6}. When the number of subcarriers that can constitute a partial physical resource block (sub-PRB) becomes a divisor of 12, one physical resource block (PRB) can be divided into integer partial physical resource blocks (sub-PRB) .

Another example is the number of subcarriers that can constitute a partial physical resource block (sub-PRB) 3,6, which is a number satisfying a specific function, such as 3 * (2 ^ n) (n = 0,1) .

When the condition of the number of subcarriers that can constitute the partial physical resource block (sub-PRB) is limited, when the base station sends the resource allocation information for the uplink data channel to the UE, Since the size of the information needed to inform the unit of the PRB is reduced, the transmission efficiency can be increased.

If a resource of an uplink data channel is allocated in a frequency domain in units of sub-PRBs, a resource unit indicating a unit of time-domain resources allocated to an uplink data channel, for rate matching, The length of a resource unit (RU), that is, the number of subframes constituting a resource unit, can be determined by the number of subcarriers constituting a partial physical resource block (sub-PRB).

For example, if the number of subcarriers constituting the partial physical resource block (sub-PRB) is three, compared with the resource allocation of the existing PRB unit, since the unit of resources allocated in the frequency domain is reduced to one quarter, The length of the resource unit may be 4 subframes.

As another example, when the number of subcarriers constituting the partial physical resource block (sub-PRB) is six, compared with the resource allocation of the existing PRB unit, since the resource unit allocated in the frequency domain is reduced to ½, The length of the resource unit may be two subframes.

N and K can be determined so that N * K = 12 when the number of subframes constituting the resource unit is N and the number of subcarriers constituting the partial physical resource block (sub-PRB) is K as described above.

Also, the UE can transmit the uplink data channel to the BS based on the uplink data channel resource allocation information received from the BS (S110).

In this case, when a frequency resource for an uplink data channel is allocated in units of a partial physical resource block (sub-PRB), the maximum number of subframes constituting an uplink data channel resource in the time axis is determined according to the above- It can be different. For example, in the above-mentioned CEModeA, the uplink data channel may be composed of a small number (for example, up to 16 or 32) of subframes because there is no or less repetitive transmission, and in the case of CEModeB, (E.g., up to 1024 or 2048) subframes than CEModeA since many repetitive transmissions can occur.

For example, when CEModeA is used for transmission of an uplink data channel and the maximum number of possible subframes is 32 and the sub-physical resource block (sub-PRB) is composed of six subcarriers, the uplink data channel resource Since the length of the resource unit RU is two subframes, up to 32/2 = 16 resource units can be allocated for uplink data channel transmission. That is, the maximum number of resource units that can be allocated for uplink data channel transmission (maximum possible number of subframes) / (number of subframes per resource unit).

In this case, the time interval length of the uplink data channel resource in each CE mode can be represented by the length of the resource unit (RU) according to the sub-physical resource block (sub-PRB).

For example, when CEModeA is used for transmission of the uplink data channel and the maximum number of possible resource units is 32 and the sub-PRB is composed of 6 subcarriers, the uplink data channel resource Since the length of the resource unit RU is two subframes, up to 32 * 2 = 64 subframes can be allocated for uplink data channel transmission. That is, the maximum number of subframes that can be allocated for uplink data channel transmission (the maximum number of possible resource units) * (the number of subframes per resource unit).

FIG. 2 is a diagram illustrating a procedure for a base station to receive a uplink data channel in the present embodiment.

Referring to FIG. 2, the BS may transmit uplink data channel resource allocation information of a partial physical resource block (sub-PRB) unit to the MS (S200).

At this time, the uplink data channel resource allocation information is configured based on the frequency interval setting information of the partial physical resource block (sub-PRB) unit.

At this time, the BS can transmit uplink data channel resource allocation information through UE-specific or cell-specific higher layer signaling (e.g., RRC signaling) . Alternatively, the UE can transmit uplink data channel resource allocation information through the DCI. Hereinafter, an example in which uplink data channel resource allocation information is transmitted from a base station using RRC signaling or DCI in FIG. 3 and FIG. 4 will be described.

1, the number of subcarriers that can constitute the partial physical resource block (sub-PRB) can be selected from arbitrary integers of 12 or less, but only integers satisfying a specific condition can be selected from partial physical May be set to be the number of subcarriers that can constitute a resource block (sub-PRB).

For example, as described with reference to FIG. 1, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) may be selected from among a set of all or a part of the subdivisions of 12. In another example, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) 3,6, which is a number satisfying a specific function, such as 3 * (2 ^ n) Can be set to be.

As described above with reference to FIG. 1, if frequency resources of an uplink data channel are allocated on a per-physical-resource block (sub-PRB) basis, time rate resources allocated to an uplink data channel The length of a resource unit (RU) indicating a unit of a physical resource block (sub-PRB), i.e., the number of subframes constituting a resource unit, can be determined by the number of subcarriers constituting a partial physical resource block (sub-PRB). For example, N and K can be determined so that N * K = 12 when the number of subframes constituting a resource unit is N and the number of subcarriers constituting a partial physical resource block (sub-PRB) is K. [

In addition, the base station may receive the uplink data channel configured based on the uplink data channel resource allocation information from the terminal (S210).

1, when a resource for an uplink data channel is allocated in units of a partial physical resource block (sub-PRB), the maximum number of subframes constituting an uplink data channel resource in the time axis is And may be changed according to the CE mode described above.

For example, in the above-mentioned CEModeA, the uplink data channel may be composed of a small number (for example, up to 16 or 32) of subframes because there is no or less repetitive transmission, and in the case of CEModeB, (E.g., up to 1024 or 2048) subframes than CEModeA since many repetitive transmissions can occur.

At this time, the time length of the uplink data channel resource in each CE mode can be expressed as the length of the resource unit (RU) according to the sub-physical resource block (sub-PRB).

3 is a diagram illustrating an example of transmitting uplink data channel resource allocation information to an MS through RRC signaling in this embodiment.

3, in the PUSCH-ResourceAllocation for transmitting the uplink data channel resource allocation information to the UE (however, the present embodiment is not limited by name), it is also possible to perform resource allocation in units of PRB Whether or not to perform resource allocation on a partial physical resource block (sub-PRB) basis can be transmitted through a resourceAllocationMode (however, the present embodiment is not limited by name). Also, when resource allocation is performed on a sub-PRB basis, the granularity of the sub-PRB, that is, the number of subcarriers constituting the sub-PRB is subPRBSize (however, the embodiment is not limited by name) parameter. At this time, as described above with reference to FIG. 1, the number of subcarriers that can constitute the sub-PRB may be selected as one of the specific integers (3, 4, 6 in this example) rather than an arbitrary integer of 12 or less.

FIG. 4 is a diagram illustrating an example of transmitting uplink data channel resource allocation information to the UE through the DCI in the present embodiment.

Referring to FIG. 4, a field indicating whether to use the PRB resource allocation method or the sub-PRB resource allocation method in the DCI format for PUSCH resource allocation may be additionally included. At this time, the corresponding field may be composed of one bit.

A DCI format for PUSCH resource allocation may further include a field indicating a unit of sub-PRB, that is, a field indicating the number of subcarriers constituting one sub-PRB. If the unit of the sub-PRB is an arbitrary integer of 12 or less, the corresponding field requires a total of 4 bits. However, if the number of possible subcarriers configuring the sub-PRB is limited as described above, (The number of possible subcarriers is not more than 2, for example 3, 6) or 2 bits (the number of possible subcarriers is not more than 4, for example, 3, 4, 6).

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

5, the base station 500 includes a control unit 510, a transmission unit 520, and a reception unit 530.

The control unit 510 controls the overall operation of the base station 500 to receive the uplink data channel from the UE.

The transmitting unit 520 and the receiving unit 530 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

The transmitter 520 may transmit uplink data channel resource allocation information for a partial physical resource block (sub-PRB) unit to the UE.

In this case, the uplink data channel resource allocation information is configured based on the frequency interval setting information of the partial physical resource block (sub-PRB) unit.

At this time, the BS transmits uplink data channel resource allocation information to the UE through UE-specific or cell-specific higher layer signaling (e.g., RRC signaling) . Alternatively, the base station may transmit the uplink data channel resource allocation information to the terminal through the DCI.

At this time, the number of subcarriers that can constitute the partial physical resource block (sub-PRB) can be selected from arbitrary constants equal to or less than 12, but only constants satisfying specific conditions can be selected from sub- The number of subcarriers that can constitute the subcarrier can be set.

For example, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) can be selected as one of the elements of the set consisting of all or part of the divisors of 12. For example, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) may be one of {1,2,3,4,6} which is a divisor of 12, {1,2,3 , 4,6}, which is a subset of {3,4,6}. When the number of subcarriers that can constitute a partial physical resource block (sub-PRB) becomes a divisor of 12, one physical resource block (PRB) can be divided into integer partial physical resource blocks (sub-PRB) .

Another example is the number of subcarriers that can constitute a partial physical resource block (sub-PRB) 3,6, which is a number satisfying a specific function, such as 3 * (2 ^ n) (n = 0,1) .

When the condition of the number of subcarriers that can constitute the partial physical resource block (sub-PRB) is limited, when the base station sends the resource allocation information for the uplink data channel to the UE, Since the size of the information needed to inform the unit of the PRB is reduced, the transmission efficiency can be increased.

If a resource of an uplink data channel is allocated in units of a partial physical resource block (sub-PRB), a resource unit (RU) indicating a unit of time resource allocated to the uplink data channel, for rate matching, resource unit, that is, the number of subframes constituting the resource unit may be determined by the number of subcarriers constituting the partial physical resource block (sub-PRB).

For example, if the number of subcarriers constituting the partial physical resource block (sub-PRB) is three, compared with the resource allocation of the existing PRB unit, since the unit of resources allocated in the frequency domain is reduced to one quarter, The length of the resource unit may be 4 subframes.

As another example, when the number of subcarriers constituting the partial physical resource block (sub-PRB) is six, compared with the resource allocation of the existing PRB unit, since the resource unit allocated in the frequency domain is reduced to ½, The length of the resource unit may be two subframes.

N and K can be determined so that N * K = 12 when the number of subframes constituting the resource unit is N and the number of subcarriers constituting the partial physical resource block (sub-PRB) is K as described above.

In a case where a frequency resource for an uplink data channel is allocated in units of a partial physical resource block (sub-PRB), the maximum number of subframes constituting an uplink data channel resource in the time axis may be changed according to the CE mode described above .

For example, in the above-mentioned CEModeA, the uplink data channel may be composed of a small number (for example, up to 16 or 32) of subframes because there is no or less repetitive transmission, and in the case of CEModeB, (E.g., up to 1024 or 2048) subframes than CEModeA since many repetitive transmissions can occur.

At this time, the time length of the uplink data channel resource in each CE mode can be expressed as the length of the resource unit (RU) according to the sub-physical resource block (sub-PRB).

The receiving unit 530 can receive the uplink data channel configured based on the uplink data channel resource allocation information transmitted from the transmitting unit 520 from the terminal.

FIG. 6 is a diagram illustrating a configuration of a terminal according to the present embodiments.

6, the terminal 600 includes a receiving unit 610, a control unit 620, and a transmitting unit 630.

The receiving unit 610 receives control information, data, and a message from the base station. More specifically, the receiver 610 can receive uplink data channel resource allocation information of a partial physical resource block (sub-PRB) unit from a base station.

In this case, the uplink data channel resource allocation information is configured based on the frequency interval setting information of the partial physical resource block (sub-PRB) unit.

At this time, the UE can receive uplink data channel resource allocation information through UE-specific or cell-specific higher layer signaling (e.g., RRC signaling) have. Alternatively, the UE may receive the uplink data channel resource allocation information through the DCI.

At this time, the number of subcarriers that can constitute the partial physical resource block (sub-PRB) can be selected from arbitrary constants equal to or less than 12, but only constants satisfying specific conditions can be selected from sub- The number of subcarriers that can constitute the subcarrier can be set.

As described above, for example, the number of subcarriers that can constitute the partial physical resource block (sub-PRB) may be selected as one of the elements of the set consisting of all or part of the subdivisions of 12. For example, the number of subcarriers that can constitute a partial physical resource block (sub-PRB) may be one of {1,2,3,4,6} which is a divisor of 12, {1,2,3 , 4,6}, which is a subset of {3,4,6}. When the number of subcarriers that can constitute a partial physical resource block (sub-PRB) becomes a divisor of 12, one physical resource block (PRB) can be divided into integer partial physical resource blocks (sub-PRB) .

Another example is the number of subcarriers that can constitute a partial physical resource block (sub-PRB) 3,6, which is a number satisfying a specific function, such as 3 * (2 ^ n) (n = 0,1) .

When the condition of the number of subcarriers that can constitute the partial physical resource block (sub-PRB) is limited, when the base station sends the resource allocation information for the uplink data channel to the UE, Since the size of the information needed to inform the unit of the PRB is reduced, the transmission efficiency can be increased.

If a resource of an uplink data channel is allocated in units of a partial physical resource block (sub-PRB), a resource unit (RU) indicating a unit of time resource allocated to the uplink data channel, for rate matching, resource unit, that is, the number of subframes constituting the resource unit may be determined by the number of subcarriers constituting the partial physical resource block (sub-PRB).

For example, if the number of subcarriers constituting the partial physical resource block (sub-PRB) is three, compared with the resource allocation of the existing PRB unit, since the unit of resources allocated in the frequency domain is reduced to one quarter, The length of the resource unit may be 4 subframes.

As another example, when the number of subcarriers constituting the partial physical resource block (sub-PRB) is six, compared with the resource allocation of the existing PRB unit, since the resource unit allocated in the frequency domain is reduced to ½, The length of the resource unit may be two subframes.

N and K can be determined so that N * K = 12 when the number of subframes constituting the resource unit is N and the number of subcarriers constituting the partial physical resource block (sub-PRB) is K as described above.

The control unit 620 controls the overall operation of the terminal to transmit the uplink data channel.

The transmitter 630 may transmit the uplink data channel to the base station based on the uplink data channel resource allocation information received by the receiver 610.

At this time, when the resource for the uplink data channel is allocated in units of partial physical resource blocks (sub-PRBs) as described above, the maximum number of subframes constituting the uplink data channel resource on the time axis is the same as the above- Depending on the mode.

For example, in the above-mentioned CEModeA, the uplink data channel may be composed of a small number (for example, up to 16 or 32) of subframes because there is no or less repetitive transmission, and in the case of CEModeB, (E.g., up to 1024 or 2048) subframes than CEModeA since many repetitive transmissions can occur.

In this case, the time interval length of the uplink data channel resource in each CE mode can be represented by the length of the resource unit (RU) according to the sub-physical resource block (sub-PRB).

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 portions of the standard documents are added to or contained in 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 (20)

A method for transmitting an uplink data channel (PUSCH)
Receiving uplink data channel resource allocation information from a base station; And
And transmitting the uplink data channel to the base station based on the uplink data channel resource allocation information.
The uplink data channel resource allocation information includes:
And a frequency interval setting information of a partial physical resource block (sub-PRB) unit.
The method according to claim 1,
The uplink data channel resource allocation information includes:
RTI ID = 0.0 > RRC < / RTI > signaling.
The method according to claim 1,
The uplink data channel resource allocation information includes:
RTI ID = 0.0 > DCI. ≪ / RTI >
The method according to claim 1,
Wherein a length of a resource unit (RU), which is a unit of time domain resources of the uplink data channel, is determined by the number of subcarriers constituting the partial physical resource block (sub-PRB).
5. The method of claim 4,
Wherein N * K = 12 when the number of subframes constituting the resource unit is N and the number of subcarriers constituting the partial physical resource block (sub-PRB) is K.
A method for a base station to receive an uplink data channel (PUSCH)
Transmitting uplink data channel resource allocation information to a terminal; And
And receiving an uplink data channel configured based on the uplink data channel resource allocation information from the terminal,
The uplink data channel resource allocation information includes:
And a frequency interval setting information of a partial physical resource block (sub-PRB) unit.
The method according to claim 6,
The uplink data channel resource allocation information includes:
RRC signaling to the terminal.
The method according to claim 6,
The uplink data channel resource allocation information includes:
DCI. ≪ / RTI >
The method according to claim 6,
Wherein a length of a resource unit (RU), which is a unit of time domain resources of the uplink data channel, is determined by the number of subcarriers constituting the partial physical resource block (sub-PRB).
10. The method of claim 9,
Wherein N * K = 12 when the number of subframes constituting the resource unit is N and the number of subcarriers constituting the partial physical resource block (sub-PRB) is K.
A terminal for transmitting an uplink data channel (PUSCH)
A receiver for receiving uplink data channel resource allocation information from a base station; And
And a transmitter for transmitting the uplink data channel to the base station based on the uplink data channel resource allocation information.
The uplink data channel resource allocation information includes:
And a frequency interval setting information of a partial physical resource block (sub-PRB) unit.
12. The method of claim 11,
The uplink data channel resource allocation information includes:
RRC < / RTI > signaling.
12. The method of claim 11,
The uplink data channel resource allocation information includes:
DCI. ≪ / RTI >
12. The method of claim 11,
Wherein a length of a resource unit (RU), which is a unit of time-domain resources of the uplink data channel, is determined by the number of subcarriers constituting the partial physical resource block (sub-PRB).
15. The method of claim 14,
Wherein N * K = 12 when the number of subframes constituting the resource unit is N and the number of subcarriers constituting the partial physical resource block (sub-PRB) is K.
A method for a base station to receive an uplink data channel (PUSCH)
A transmitter for transmitting uplink data channel resource allocation information to the MTC terminal; And
And a receiver for receiving an uplink data channel configured based on the uplink data channel resource allocation information from the terminal,
The uplink data channel resource allocation information includes:
Wherein the base station is configured on the basis of frequency division setting information of a partial physical resource block (sub-PRB) unit.
17. The method of claim 16,
The uplink data channel resource allocation information includes:
RRC signaling to the terminal.
17. The method of claim 16,
The uplink data channel resource allocation information includes:
DCI. ≪ / RTI >
17. The method of claim 16,
Wherein a length of a resource unit (RU), which is a unit of time-domain resources of the uplink data channel, is determined by the number of subcarriers constituting the partial physical resource block (sub-PRB).
20. The method of claim 19,
Wherein N * K = 12 when the number of subframes constituting said resource unit is N and the number of subcarriers constituting said partial physical resource block (sub-PRB) is K.

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