KR101979502B1 - METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING MULTICASTING CONTROL CHANNEL FOR NB-IoT USER EQUIPMENT - Google Patents

Abstract

The embodiments of the present invention are applicable to a BL / CE (Bandwidth Reduced Low Complexity / Coverage Enhancement) terminal for MTC (Machine Type Communication) application defined in the 3GPP LTE / LTE- -to-Multi-point) support method. In particular, a method of setting a search space for monitoring DCI to transmit SC-MCCH transmission resource allocation information and change information is proposed.

Description

Technical Field [0001] The present invention relates to a method and apparatus for transmitting and receiving multicast control channels for an NB-IoT terminal,

The present embodiments relate to a method for supporting an SC-PTM (Single Cell Point-to-Multipoint) for an NB-IoT terminal defined in a 3GPP LTE / LTE-Advanced system.

Bandwidth reduced low complexity (BL) terminals and coverage enhancement (CE) terminal technologies have been standardized in 3GPP Release-12/13. A Low Complexity (LC) terminal represents a terminal that is targeted for low-end, low-rate, low-latency low-end applications such as some MTC (Machine Type Communication). The LC terminal has reduced Tx and Rx capabilities compared to other category terminals. The BL terminal operates in any LTE system band with a limited channel bandwidth of 6PRB corresponding to the maximum channel bandwidth available in a 1.4MHz LTE system. The CE terminal needs an enhanced coverage function to connect to the cell.

Narrowband Internet of Things (NB-IoT) technology has been standardized in 3GPP Release-13. This objective is to specify radio access for cellular IoT, which includes improved indoor coverage, support for large-scale low-speed terminals, low latency sensitivity, low cost terminal costs, low power consumption, and optimized network architecture. do.

In Release-13, the BL / CE terminal or NB-IoT terminal was provided with functions to enable the 3GPP system to penetrate the low-cost IoT market rapidly. Accordingly, some functions provided to general LTE terminals providing mobile broadband services are not provided.

For example, multicast transmission (or MBMS service or SC-PTM transmission) provided for a general LTE terminal is not provided for a Release-13 BL / CE terminal or an NB-IoT terminal. Therefore, there is no method for supporting multicast transmission of BL / CE terminal or NB-IoT terminal in Release-13.

It is an object of the present embodiments to provide a method of constructing a search space for a downlink control channel capable of supporting multicasting control channel transmission for an NB-IoT terminal.

In one aspect, the present embodiments provide a method of receiving a multicasting control channel (SC-MCCH) by a Narrowband-Internet of Things (NB-IoT) terminal, comprising: receiving scheduling control information for a multicasting control channel from a base station; Receiving scheduling control information for a multicast control channel through an NPDCCH search space configured based on setting information, receiving scheduling control information for a multicast control channel based on scheduling control information, And receiving a casting control channel, wherein the configuration information is received via higher layer signaling.

In another aspect, the present embodiments provide a method for transmitting a multicasting control channel for an NB-IoT terminal, the method comprising: setting a separate NPDCCH search space for transmitting scheduling control information for a multicasting control channel; Transmitting the scheduling control information for the multicasting control channel through the NPDCCH search space, and transmitting the multicasting control channel based on the scheduling control information, wherein the setting information on the NPDCCH search space includes upper layer signaling Lt; / RTI >

According to another aspect of the present invention, there is provided an NB-IoT terminal receiving a multicasting control channel, the apparatus comprising: a receiving unit configured to receive setting information related to an NPDCCH search space set separately for receiving scheduling control information for a multicasting control channel from a base station And a control unit for confirming scheduling control information for a multicasting control channel through an NPDCCH search space configured based on setting information and for controlling reception of a multicasting control channel based on scheduling control information, And provides the NB-IoT terminal received through the higher layer signaling.

According to another aspect of the present invention, in the base station transmitting the multicasting control channel for the NB-IoT terminal, a separate NPDCCH search space for transmitting the scheduling control information for the multicasting control channel is set, And a transmitter for transmitting a multicasting control channel based on the scheduling control information. The setting information on the NPDCCH search space includes upper layer signaling Lt; / RTI >

According to the embodiments of the present invention, a separate downlink control channel search space for transmitting / receiving scheduling control information for a multicasting control channel is formed, thereby supporting multicasting control channel transmission for an NB-IoT terminal.

1 and 2 are diagrams showing a system information block in which a base station broadcasts information for receiving SC-MCCH information of a terminal.
3 is a diagram illustrating a PDCCH and a PDSCH set by a G-RNTI or an SC-RNTI with respect to a search space of a UE to which an SC-PTM is applied.
FIG. 4 is a diagram illustrating a PDCCH set by the SC-N-RNTI with respect to a search space of a terminal to which an SC-PTM is applied.
5 to 8 show MPDCCH candidates monitored by the BL / CE terminal in relation to the MPDCCH search space.
9 is a diagram illustrating determination of the repetition level in relation to the MPDCCH search space.
10 is a diagram illustrating a repetition level for a Type 1-MPDCCH common search space with respect to an MPDCCH search space.
11 is a diagram illustrating a mapping for a DCI subframe repetition number with respect to an MPDCCH search space.
12 is a diagram illustrating NPDCCH UE-specific search space candidates with respect to the NPDCCH search space.
FIG. 13 is a diagram showing the Type 1-NPDCCH common search space candidates with respect to the NPDCCH search space.
FIG. 14 is a diagram showing a Type 2-NPDCCH common search space candidate in relation to the NPDCCH search space. FIG.
15 and 16 illustrate a process of transmitting and receiving a multicast control channel for an NB-IoT terminal.
FIGS. 17 and 18 are diagrams illustrating a procedure of a multicast control channel transmission / reception method for a BL / CE terminal.
FIG. 19 is a diagram illustrating a configuration of a user terminal according to the present embodiments.
20 is a diagram illustrating a configuration of a base station 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 symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

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

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

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

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

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

Since the various cells listed above exist in the base station controlling each cell, the base station can be interpreted into two meanings. i) 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 the present 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, the PDCCH, which is an embodiment of the present invention, may be applied to the PDCCH, and the PDCCH may be applied to the portion described with the EPDCCH.

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.

In 3GPP Release-12/13, standardization of A bandwidth reduced low complexity (BL) terminal and coverage enhancement (CE) terminal technology has been standardized. Low complexity (LC) terminals represent terminals targeted for low-end, low-rate, low-latency low-end applications such as some MTCs. The LC terminal has reduced Tx and Rx capabilities compared to other category terminals. The BL terminal operates in any LTE system band with a limited channel bandwidth of 6PRB corresponding to the maximum channel bandwidth available in a 1.4MHz LTE system. The CE terminal needs an enhanced coverage function to connect to the cell.

Narrowband Internet of Things (NB-IoT) technology has been standardized in 3GPP Release-13. This objective is to specify radio access for cellular IoT, which includes improved indoor coverage, support for large-scale low-rate terminals, low latency sensitivity, low cost terminal cost, low power consumption and optimized network architecture.

Release-13 BL / CE terminals or NB-IoT terminals were provided with functions to enable the 3GPP system to penetrate the low-cost IoT market rapidly. Accordingly, some functions provided to a general LTE terminal providing mobile broadband service have not been provided. For example, for a Rel-13 BL / CE terminal or an NB-IoT terminal, multicast transmission (or MBMS service or SC-PTM transmission) provided for a general terminal is explained based on SC- One MBSFN transmission is also included in the scope of the present invention).

In LTE, the MBMS transmission uses either MBSFN transmission or SC-PTM transmission. The MCE decides whether to use SC-PTM or MBSFN for each MBMS session. The SC-PTM is the MBMS transmission in a single cell coverage. In the SC-PTM, one control channel SC-MCCH and one or more traffic channels SC-MTCH (s) are provided. One control channel SC-MCCH and one or more traffic channels SC-MTCH (s) are mapped on the DL-SCH (i.e., PDSCH).

In the prior art, the UE was able to identify the SC-MCCH transmission on the PDCCH using the SC-RNTI. Here, the SC-MCCH indicates a control channel or control information for transmitting control information associated with the MBMS transmission using the SC-PTM. The SC-MCCH uses a modification period. A notification mechanism is used to announce changes in the SC-MCCH due to session initiation. The notification is sent in the first sub-frame within a repetition period in which the SC-MCCH can be scheduled. The notification is sent using the DCI format 1C with the Single Cell Notification RNTI (SC-N-RNTI) and with one bit in the 8 bit bitmap (The notification is sent using the DCI format 1C with SC-N-RNTI and one bit within the 8-bit bitmap). When the UE receives the notification, it gets the SC-MCCH in the same subframe. The UE detects the change to the unacknowledged SC-MCCH by the notification mechanism through the SC-MCCH monitoring in the modification period.

[SC-PTM]

The UE with the MBMS service established through the SC-MRB can acquire timing information for acquiring the SC-MCCH information through the SIB 20 (System Information Block Type 20).

In the prior art, a UE searches for a common search space on a PDCCH using an SC-RNTI (Single Cell RNTI), receives PDSCH resource allocation information for SC-MCCH transmission, and based on the received PD- . The base station broadcasts information for receiving the SC-MCCH information through the SIB 20. The information included in the SIB 20 includes sc-mcch-RepetitionPeriod information defining an interval between SC-MCCH information transmissions, sc-mcch-Offset indicating a radio frame on which the SC-MCCH is scheduled, Sc-mcch-duration information indicating a duration in which the SC-MCCH can be scheduled starting from the subframe indicated by sc-mcch-FirstSubframe, and the like. A detailed description of this can be found in Appendix TS36.331.

TS36.331

SystemInformationBlockType20

The IE SystemInformationBlockType20 illustrated in Fig.1 and Fig. 2 contains the information required to acquire the control information associated with the MBMS using SC-PTM.

[Search Space for SC-PTM]

As described above, the control information (SC-MCCH) and the data information (SC-MTCH) for the UE to which the SC-PTM is applied are transmitted through the PDSCH, CRC scrambled in SC-RNTI in case of control information (SC-MCCH) through space and CRC scrambled in G-RNTI in case of data information (SC-MTCH). Also, bitmap information related to the change notification for notifying the change of the SC-MCCH is also transmitted by CRC scrambling to the SC-N-RNTI through the PDCCH common search space.

In this regard, the details of the terminal search space and the related DCI format setting for the specific SC-PTM should be attached as an excerpt from TS36.213 below.

TS36.213

If a UE is configured by higher layers to decode PDCCH with CRC scrambled by the G-RNTI or SC-RNTI, the UE shall decode the PDCCH and the corresponding PDSCH according to any of the combinations defined in Table 7.1-4 in Fig. . The scrambling initialization of PDSCH corresponding to these PDCCHs is by G-RNTI or SC-RNTI.

If UE is configured by higher layers to decode PDCCH with CRC scrambled by SC-N-RNTI, the UE shall decode according to PDCCH 7.1-4A in Fig.

[MPDCCH Search Space Configuration]

Four search spaces have been defined as MPDCCH search spaces for Rel-13 BL / CE terminals. Type-2 common search space defined for performing monitoring only when set to CEModeA, type-1 common search space for paging, type-2 common search space for random access procedure, and UE- specific search for UE- space is defined.

Attach the following TS36.213 document to extract specific MPDCCH search space configuration.

TS36.213

9.1.5 MPDCCH assignment procedure

A BL / CE UE shall have a set of MPDCCH candidates on one or more Narrowbands (described in subclause 5.2.4 of [3]). The set is DCI formats. The Narrowband in a subframe used for MPDCCH monitoring is as described in [3].

A UE that is not a BL / CE UE is not required to monitor MPDCCH.

where

is the number of ECCEs in MPDCCH-PRB-set

of subframe

. The MPDCCH-PRB-set(s) can be configured by higher layers for either localized MPDCCH transmission or distributed MPDCCH transmission. The set of MPDCCH candidates to monitor are defined in terms of MPDCCH search spaces. The BL/CE UE shall monitor one or more of the following search spacesHigher layer signaling can configure a BL / CE UE with one or two MPDCCH-PRB-sets for MPDCCH monitoring. The PRB-pairs correspond to an MPDCCH-PRB-set are indicated by higher layers. Each MPDCCH-PRB-set consists of ECCEs numbered from 0 to

where

is the number of ECCEs in MPDCCH-PRB-set

of subframe

. The MPDCCH-PRB-set (s) can be configured for higher layers for either localized MPDCCH transmission or distributed MPDCCH transmission. The set of MPDCCH candidates are defined in terms of MPDCCH search spaces. The BL / CE UE shall monitor one or more of the following search spaces

- a Type 0-MPDCCH common search space if configured with CEmodeA,

- a Type1-MPDCCH common search space,

- a Type2-MPDCCH common search space, and

- a MPDCCH UE-specific search space.

A BL / CE UE configured with CEModeB is not required to monitor Type0-MPDCCH common search space.

The BL / CE UE is not required for simultaneous monitoring MPDCCH UE-specific search space and Type1-MPDCCH common search space.

The BL / CE UE is not required for simultaneous monitoring MPDCCH UE-specific search space and Type2-MPDCCH common search space.

ECCEs, the number of ECCEs refers to the MPDCCH mapping to the REs of the 2+4 PRB set as defined in [3]. An MPDCCH search space

at aggregation level

and repetition level

is defined by a set of MPDCCH candidates where each candidate is repeated in a set of

consecutive BL/CE downlink subframes starting with subframe

. For an MPDCCH-PRB-set

, the ECCEs corresponding to MPDCCH candidate m of the search space

are given by A BL / CE UE is not expected to monitor an MPDCCH candidate, if an ECCE corresponding to that MPDCCH candidate is mapped to a PRB pair that overlaps with a transmission of PDSCH scheduled in the same subframe. For aggregation level

ECCEs, the number of ECCEs refers to the MPDCCH mapping to the REs of the 2 + 4 PRB set as defined in [3]. An MPDCCH search space

at aggregation level

and repetition level

is defined by a set of MPDCCH candidates where each candidate is repeated in a set of

consecutive BL / CE downlink subframes starting with subframe

. For an MPDCCH-PRB-set

, The ECCEs corresponding to MPDCCH candidate m of the search space

are given by

Where

is the number of MPDCCH candidates to monitor at aggregation level

in MPDCCH-PRB-set

in each subframe in the set of

consecutive subframes.

is the number of MPDCCH candidates to monitor at aggregation level

in MPDCCH-PRB-set

in each subframe in the set of

consecutive subframes.

for MPDCCH UE-specific search space is determined as described in subclause 9.1.4, and

for Type0-MPDCCH common search space, Type1-MPDCCH common search space and Type2-MPDCCH common search space.

for MPDCCH UE-specific search space is determined as described in subclause 9.1.4, and

for Type 0-MPDCCH common search space, Type 1-MPDCCH common search space and Type 2-MPDCCH common search space.

A BL / CE UE is not expected to monitor MPDCCH in subframes that are not BL / CE DL subframes.

Until BL / CE UE receives a higher layer configuration of MPDCCH UE-specific search space, the BL / CE UE monitors MPDCCH according to the same configuration of MPDCCH search space and Narrowband as MPDCCH scheduling Msg4.

The aggregation and repetition levels define the MPDCCH search spaces and the number of monitored MPDCCH candidates are given as follows:

For MPDCCH UE-specific search space

PRB-pairs, and mPDCCH-NumRepetition=1, and- if the BL / CE UE is configured with

PRB-pairs, and mPDCCH-NumRepetition = 1, and

is substituted with

is substituted with

.- if the MPDCCH-PRB-set is configured for distributed transmission, the aggregation levels define the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.4-1a and Table 9.1.4-1b, where

is substituted with

is substituted with

.

is substituted with

and

is substituted with

.MPDCCH candidates are listed in Table 9.1.4-2a and Table 9.1.4-2b, where: MPDCCH-PRB-set is the MPDCCH-PRB-set,

is substituted with

and

is substituted with

.

- otherwise

, the aggregation and repetition levels defining the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.5-1a in Fig.5- if the UE is configured with CEModeA, and

, the aggregation and repetition levels of the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.5-1a in Fig.5

, the aggregation and repetition levels defining the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.5-1b in Fig.6- if the UE is configured with CEModeA, and

, the aggregation and repetition levels, and the number of MPDCCH candidates are listed in Table 9.1.5-1b in Fig.6

, the aggregation and repetition levels defining the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.5-2a in Fig.7- if the UE is configured with CEModeB, and

, the aggregation and repetition levels of the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.5-2a in Fig.7

, the aggregation and repetition levels defining the search spaces and the number of monitored MPDCCH candidates are listed in Table 9.1.5-2b in Fig.8- if the UE is configured with CEModeB, and

, the aggregation and repetition levels, and the number of MPDCCH candidates are listed in Table 9.1.5-2b in Fig.8

is the number of PRB-pairs configured for MPDCCH UE-specific search space. When

it is given by the higher layer parameter numberPRB-Pairs-r13, and when

it is given by the higher layer parameter numberPRB-Pairs-r11.

is the number of PRB-pairs configured for MPDCCH UE-specific search space. When

it is given by the higher layer parameter number PRB-Pairs-r13, and when

it is given by the higher layer parameter numberPRB-Pairs-r11 .

are determined from Table 9.1.5-3 in Fig.9 by substituting the value of

with the value of higher layer parameter mPDCCH-NumRepetition.

are determined from Table 9.1.5-3 in Fig.9 by substituting the value of

with the value of the higher layer parameter mPDCCH-NumRepetition .

The PRB-pairs within a Narrowband corresponding to an MPDCCH-PRB-set are indicated by higher layers and are used in the description given in subclause 9.1.4.4.

is 6,

and the number of PRB-pairs in an MPDCCH-PRB-set

= 2+4.If higher layer configuration numberPRB -Pairs-r13 for MPDCCH-PRB-set

is 6,

and the number of PRB-pairs in an MPDCCH-PRB-set

= 2 + 4.

If Type2-MPDCCH common search space,

.- PRB-pairs of the 2 PRB sets in the 2 + 4 PRB set correspond to PRB-pairs with the largest two PRB indices in MPDCCH-PRB-set

.

_. - PRB-pairs of the 4 PRB sets in the 2 + 4 PRB set correspond to PRB-pairs with the smallest 4 PRB indices in MPDCCH-PRB-set

_.

- PRB-pairs of the 2 + 4 PRB set in the 2 + 4 PRB set correspond to all PRB-pairs in the MPDCCH-PRB-set

are the same as for MPDCCH UE-specific search space, andFor Type 0-MPDCCH common search space, the narrowband location and the MPDCCH-PRB-set

are the same as for MPDCCH UE-specific search space, and

- if

and repetition levels

given in Table 9.1.5.-3. For all other cases,

-

and repetition levels

given in Table 9.1.5.3. For all other cases,

- if

and repetition levels

given in Table 9.1.5.-3. For all other cases,

-

and repetition levels

given in Table 9.1.5.3. For all other cases,

- if

and repetition levels

given in Table 9.1.5.-3. For all other cases,

-

and repetition levels

given in Table 9.1.5.3. For all other cases,

is 2+4 PRB-pairs, andFor Type 1-MPDCCH common search space, the number of PRB-pairs in MPDCCH-PRB-set

is 2 + 4 PRB-pairs, and

and repetition levels

where the repetition levels are determined from Table 9.1.5-4 in Fig.10 by substituting the value of

with higher layer parameter mPDCCH -NumRepetition-Paging. -

and repetition levels

where the repetition levels are determined from Table 9.1.5-4 in Fig.10 by substituting the value of

with higher layer parameter mPDCCH -NumRepetition-Paging .

- For all other cases,

is 2+4 PRB-pairs, andFor Type 2-MPDCCH common search space, the number of PRB-pairs in MPDCCH-PRB-set

is 2 + 4 PRB-pairs, and

<8 as zero.- If the most recent coverage enhancement level is used for PRACH is coverage enhancement level 0 and 1, the aggregation and repetition levels define the search spaces and the number of monitored MPDCCH candidates are determined from Table 9.1.5-1b, by assuming that the number of candidates for

<8 as zero.

If the most recent coverage enhancement level is used for PRACH is coverage enhancement levels 2 and 3, the aggregation and repetition levels define the search spaces and the number of monitored MPDCCH candidates are determined from Table 9.1.5-2b.

are determined from Table 9.1.5-3 by substituting the value of

with the value of higher layer parameter mPDCCH-NumRepetition-RA. where

are determined from Table 9.1.5-3 by substituting the value of

with the value of the higher layer parameter mPDCCH-NumRepetition-RA .

is applied for

is applied for

substituting the values of

.In tables 9.1.5-1a, 9.1.5-1b, 9.1.5-2a, 9.1.5-2b, and for Type0, Type1, Type2 MPDCCH common search space,

is applied for

is applied for

substituting the values of

.

For Type 1-MPDCCH common search space and Type 2-MPDCCH common search space, distributed MPDCCH transmission is used.

are given by

consecutive BL/CE DL subframe from subframe

whereFor MPDCCH UE-specific search space, Type 0-common search space, and Type 2-common search space locations of starting subframe

are given by

consecutive BL / CE DL subframe from subframe

where

is a subframe satisfying the condition

where

- subframe

is a subframe satisfying the condition

where

is given by the higher layer parameter mPDCCH-startSF-UESS, - For MPDCCH UE-specific search space, Type 0-common search space

is given by the higher layer parameter mPDCCH-startSF-UESS ,

is given by the higher layer parameter mPDCCH-startSF-CSS-RA-r13 - For Type 2-common search space,

is given by the higher layer parameter mPDCCH-startSF-CSS-RA-r13

is given by higher layer parameter mPDCCH-NumRepetition, and-

is given by higher layer parameter mPDCCH-NumRepetition , and

are given in Table 9.1.5-3.-

are given in Table 9.1.5-3.

and

that result in non-integer values of

.A BL / CE UE is not expected to be configured with values of

and

that result in non-integer values of

.

and is determined from locations of paging opportunity subframes, For Type 1-common search space,

and is determined from locations of paging opportunity subframes,

, a BL/CE UE shall assume MPDCCH in the same narrowband in the subframe

is dropped.If SystemInformationBlockType1 -BR or SI message is transmitted in one narrowband in subframe

, a BL / CE UE shall assume MPDCCH in the same narrowband in the subframe

is dropped.

and also occur within frame

.The BL / CE UE is not required to monitor an MPDCCH search space if any ECCEs corresponding to any of its MPDCCH candidates occur within a frame before

and also occur within frame

.

For MPDCCH UE-specific search space or for Type 0-common search space if higher layer parameter mPDCCH - NumRepetition is set to 1; or for Type 2-common search space if the higher layer parameter mPDCCH - NumRepetition -RA is set to 1;

- The BL / CE UE is not required to monitor MPDCCH

- For TDD and normal downlink CP, in special subframes for the special subframe configurations 0 and 5 shown in Table 4.2-1 of [3]

- For TDD and extended downlink CP, in special subframes for the special subframe configurations 0, 4 and 7 shown in Table 4.2-1 of [3];

Otherwise

- The BL / CE UE is not required to monitor MPDCCH

- For TDD, in special subframes, if the BL / CE UE is configured with CEModeB

- For TDD and normal downlink CP, in special subframes for the special subframe configurations 0, 1, 2, 5, 6, 7 and 9 shown in Table 4.2-1 of [3], if the BL / CE UE is configured with CEModeA

- For TDD and extended downlink CP, in special subframes for the special subframe configurations 0, 4, 7, 8 and 9 shown in Table 4.2-1 of [3], if the BL / CE UE is configured with CEModeA.

The number of MPDCCH repetitions is indicated in the DCI subframe repetition number field according to DCI according to Table 9.1.5-5 in Fig.11.

[NPDCCH Search Space Configuration]

Three search spaces have been defined as NPDCCH search spaces for Rel-13 NB-IoT terminals. Type-1 common search space for paging, type-2 common search space for random access procedure, and UE-specific search space for UE-specific data transmission and reception.

Attached is an excerpt from the TS36.213 document below regarding the specific NPDCCH search space configuration.

TS36.213

16.6 Narrowband physical downlink control channel related procedures

A UE shall monitor a set of NPDCCH candidates (described in subclause 10.2.2.1 of [3]). DCI formats.

The set of NPDCCH candidates are defined in terms of NPDCCH search spaces.

The UE shall monitor one or more of the following search spaces

- a Type1-NPDCCH common search space,

- a Type2-NPDCCH common search space, and

- a NPDCCH UE-specific search space.

A UE is not required to simultaneously monitor a NPDCCH UE-specific search space and a Type-1-NPDCCH common search space.

A UE is not required to simultaneously monitor a NPDCCH UE-specific search space and a Type2-NPDCCH common search space.

A UE is not required to simultaneously monitor a Type-1-NPDCCH common search space and a Type2-NPDCCH common search space.

at aggregation level

and repetition level

is defined by a set of NPDCCH candidates where each candidate is repeated in a set of

consecutive NB-IoT downlink subframes excluding subframes used for transmission of SI messages starting with subframe

.An NPDCCH search space

at aggregation level

and repetition level

is defined by a set of NPDCCH candidates where each candidate is repeated in a set of

consecutive NB-IoT downlink subframes excluding subframes used for transmission of SI messages starting with subframe

.

For NPDCCH UE-specific search space, the aggregation and repetition levels define the search spaces and the corresponding NPDCCH candidates are listed in Table 16.6-1 in Fig.12 by substituting the value of

with the higher layer configured parameter al-Repetition-USS .

with the higher layer configured parameter al-Repetition-CSS-Paging.For Type 1-NPDCCH common search space, the aggregation and repetition levels are listed in Table 16.6-2 in Fig.13 by substituting the value of

with the higher layer configured parameter al-Repetition-CSS-Paging .

with the higher layer configured parameter npdcch - MaxNumRepetitions -RA.For Type 2-NPDCCH common search space, the aggregation and repetition levels defining the search spaces and the corresponding monitored NPDCCH candidates are listed in Table 16.6-3 in Fig.14 by substituting the value of

with the higher layer configured parameter npdcch - MaxNumRepetitions -RA .

are given by

where

is the

^th consecutive NB-IoT DL subframe from subframe

, and

, and where The locations of starting subframe

are given by

where

is the

^th consecutive NB-IoT DL subframe from subframe

, and

, and where

is a subframe satisfying the condition

- subframe

is a subframe satisfying the condition

- for NPDCCH UE-specific search space,

is given by the higher layer parameter nPDCCH-startSF-UESS, -

is given by the higher layer parameter nPDCCH-startSF-UESS ,

is given by the higher layer parameter nPDCCH - startSFoffset -UESS,-

is given by the higher layer parameter nPDCCH - startSFoffset -UESS ,

- for NPDCCH Type 2-NPDCCH common search space,

is given by the higher layer parameter nPDCCH-startSF-Type2CSS, -

is given by the higher layer parameter nPDCCH-startSF-Type2CSS ,

is given by the higher layer parameter nPDCCH - startSFoffset -Type2CSS, -

is given by the higher layer parameter nPDCCH - startSFoffset -Type2CSS ,

and is determined from locations of NB-IoT paging opportunity subframes.For Type1-NPDCCH common search space,

and is determined from locations of NB-IoT paging opportunity subframes.

If the UE is configured with high layers with a PRB for monitoring NPDCCH UE-specific search space,

- the UE shall monitor the NPDCCH UE-specific search space on the higher layer configured PRB,

- the UE is not expected to receive NPSS, NSSS, NPBCH on the higher layer configured PRB.

otherwise,

- the UE shall monitor the NPDCCH UE-specific search space on the same PRB on which NPSS / NSSS / NPBCH are detected.

If a NB-IoT UE detects NPDCCH with DCI Format N0 ending in subframe n, and if the corresponding NPUSCH format 1 transmission starts from n + k , the UE is not required to monitor NPDCCH in any subframe starting from subframe n + 1 to subframe n + k-1 .

If the NB-IoT UE detects NPDCCH with DCI Format N1 or N2 ending in subframe n , and if the corresponding NPDSCH transmission starts from n + k , the UE is not required to monitor NPDCCH in any subframe starting from subframe n + 1 to subframe n + k-1 .

If a NB-IoT UE detects NPDCCH with DCI Format N1 ending in subframe n , and if the corresponding NPUSCH format 2 transmission starts from subframe n + k , the UE is not required to monitor NPDCCH in any subframe starting from subframe n + 1 to subframe n + k-1 .

If a NB-IoT UE detects NPDCCH with DCI Format N1 for "PDCCH order" ending in subframe n , and if the corresponding NPRACH transmission starts from subframe n + k , the UE is not required to monitor NPDCCH in any subframe starting from subframe n +1 to subframe n + k-1 .

If a NB-IoT UE has a NPUSCH transmission ending in subframe n , the UE is not required to monitor NPDCCH in any subframe starting from subframe n + 1 to subframe n + 3 .

A NB-IoT UE is not required to monitor NPDCCH candidates of an NPDCCH search space if an NPDCCH candidate of the NPDCCH search space ends in a subframe n , and if the UE is configured to monitor NPDCCH candidates of another NPDCCH search space starting before subframe n +5 .

In the present invention, a method for constructing a search space of MPDCCH or NPDCCH for SC-PTM support of a BL / CE terminal and an NB-IoT terminal is proposed.

In particular, the MPDCCH or NPDCCH in which CRC scrambling is performed based on the SC-RNTI for transmitting the PDSCH scheduling information for transmitting the SC-MCCH information for transmitting the SC-PTM related control information and the SC-N notifying the change in the SC- We propose a method for defining a search space consisting of MPDCCH candidates or NPDCCH candidates for transmitting MPDCCH or NPDCCH with CRC scrambling based on RNTI.

According to the SC-MCCH information transmission method for an existing normal LTE terminal, the LTE terminal to which the SC-PTM service is applied receives the DCI scrambled with the SC-RNTI and the SC-N-RNTI through the CSS of the PDCCH, The scheduling information for the PDSCH that transmits the PDSCH can be obtained. However, in the case of the BL / CE terminal and the NB-IoT terminal, it is impossible to receive the PDCCH.

Therefore, when the SC-PTM is supported for the BL / CE terminal and the NB-IoT terminal, the BL / CE terminal and the NB-IoT terminal receive the DCI for transmitting the scheduling information for the PDSCH for transmitting the SC- MPDCCH and NPDCCH search space needs to be set separately.

In the present invention, a method for constructing an MPDCCH and an NPDCCH search space for receiving scheduling information for a PDSCH including an SC-MCCH is proposed by the BL / CE terminal and the NB-IoT terminal.

Solution 1. The SC-1 through Type-1 CSS (Common Search Space) MCCH  How to send scheduling control information

The BS / cell / TRP includes an SC-type common search space consisting of MPDCCH or NPDCCH candidates for transmitting the DCI including the scheduling information for the paging message for the BL / CE terminal and the NB- DCI including scheduling information for SC-MCCH for providing PTM service and DCI including notification information for SC-MCCH change can be defined to be transmitted by CRC scrambling to SC-RNTI and SC-N-RNTI, respectively. have.

In this case, the BL / CE terminal and the NB-IoT terminal to which the SC-PTM service is applied, not only the P-RNTI but also the SC-RNTI for the MPDCCH candidates or NPDCCH candidates constituting the type- And SC-N-RNTI based blind decoding.

That is, in the case of the DCI including the PDSCH scheduling control information for the corresponding SC-MCCH, the CRC is scrambled based on the corresponding SC-RNTI and transmitted through the MPDCCH or NPDCCH of the corresponding type-1 CSS, IoT terminals can receive the scheduling control information for the corresponding SC-MCCH by monitoring the type-1 CSS, respectively.

The 8-bit bitmap information for notifying the change of the SC-MCCH is also CRC scrambled based on the corresponding SC-N-RNTI, transmitted through the MPDCCH or NPDCCH of the corresponding type-1 CSS, -IoT terminals can receive the corresponding SC-MCCH change notification information by monitoring the type-1 CSS, respectively.

However, when the SC-RNTI-based SC-MCCH based scheduling control information is transmitted through the type-1 CSS, the DCI format defined for paging (i.e., DCI format for the BL / 6-2 for NB-IoT, and DCI format N2 for NB-IoT).

Alternatively, when scheduling control information for an SC-RNTI-based SC-MCCH is transmitted through a type-1 CSS, a DCI format different from the DCI format defined for paging may be defined to be used. For example, in the case of a BL / CE terminal, MPDCCH scrambled with a corresponding SC-RNTI is defined to be transmitted based on DCI format 6-1A or 6-1B. In case of NB-IoT, It can be defined to transmit the scrambled NPDCCH to the RNTI.

Likewise, in the case of MPDCCH or NPDCCH transmitted by CRC scrambling based on SC-N-RNTI to notify a change to SC-MCCH through type-1 CSS, DCI format defined for paging (i.e., DCI format 6-2 in case of NB-IoT, DCI format N2 in case of NB-IoT).

Or if notification information for SC-MCCH change based on SC-N-RNTI is transmitted through type-1 CSS, DCI format defined for paging may be defined to be a separate DCI format. For example, in case of BL / CE terminal, MPDCCH scrambled with corresponding SC-N-RNTI is defined to be transmitted based on DCI format 6-1A or 6-1B. In case of NB-IoT, And to transmit the scrambled NPDCCH to the SC-N-RNTI.

How to define a separate CSS

In addition to type-0, type-1, type-2 CSS and USS defined for the BL / CE terminal and NB-IoT terminal, type-3 for transmitting DCI including scheduling control information for SC- CSS or SC-SS or Group Search Space (GSS).

In this case, the RRC parameters for setting the type-3 CSS (or SC-SS or GSS) can be transmitted through cell-specific RRC signaling.

Hereinafter, an embodiment for constructing a separate CSS (or SC-SS or GSS) for the NB-IoT terminal will be described.

값 설정 parameter, nPDCCH -startSFoffset-Type3CSS를 별도로 정의하여 UE-specific RRC signaling이나 혹은 cell-specific RRC signaling을 통해 전송하고, 이를 기존의 NPDCCH 검색 공간 설정식에 적용하여, 해당 type-3 CSS(혹은 SC-SS 또는 GSS)를 구성하도록 할 수 있다. npdcch -MaxNumRepetitions-SCPTM, and the G for defining the start subframe, for setting the maximum repetitive transmission count value of NPDCCH for configuring the type-3 CSS (or SC-SS or GSS) in case of type-3 NB-IoT terminal. Value setting parameter, nPDCCH - startSF - Type3CSS and

(RRC) signaling, or cell-specific RRC signaling, and applies it to the existing NPDCCH search space setting equation to define the value type parameter, nPDCCH -startSFoffset-Type3CSS , -SS or GSS).

값 설정 parameter, nPDCCH -startSFoffset-Type3CSS를 별도로 정의하여 UE-specific RRC signaling이나 혹은 cell-specific RRC signaling을 통해 전송하여, 이를 기존의 NPDCCH 검색 공간 설정식에 적용하여, 해당 type-3 CSS(혹은 SC-SS 또는 GSS)를 구성하도록 할 수 있다.Or the RRC parameter value set for paging, al-Repetition-CSS-Paging , as the maximum repetition number of NPDCCH to be applied for configuring the type-3 CSS (or SC-SS or GSS) A G value setting parameter for defining nPDCCH - startSF - Type 3CSS and

(RRC) signaling or cell-specific RRC signaling, and applies it to the existing NPDCCH search space setting formula to define the value type parameter, nPDCCH -startSFoffset-Type3CSS , -SS or GSS).

Or npdcch - MaxNumRepetitions - SCPTM is separately defined and transmitted through UE-specific or cell-specific RRC signaling, and the maximum number of repetition times of the NPDCCH is set to configure the type-3 CSS (or SC-SS or GSS) The subframes constituting the type-3 CSS (or the SC-SS or the GSS) correspond to the RRC parameters for the SC-PTM configuration, such as sc-mcch-RepetitionPeriod-r13, sc-mcch- FirstSubframe-r13, sc-mcch-duration-r13, and sc-mcch-ModificationPeriod-r13.

Or the RRC parameter value set for paging, al-Repetition-CSS-Paging , as the maximum number of repetitive transmission counts of the NPDCCH to be applied to configure the type-3 CSS (or SC-SS or GSS) The subframes constituting the 3 CSS (or SC-SS or GSS) are also the RRC parameters for the SC-PTM configuration, sc-mcch-RepetitionPeriod-r13, sc-mcch-Offset-r13, sc-mcch-FirstSubframe-r13 , sc-mcch-duration-r13, and sc-mcch-ModificationPeriod-r13.

Hereinafter, an embodiment for constructing a separate CSS (or SC-SS or GSS) for the BL / CE terminal will be described.

As another embodiment for defining a separate type-3 CSS or an SC-SS or a GSS (Group Search Space), in case of a BL / CE terminal, a type-3 CSS (or SC-SS or GSS) The PRB allocation information constituting the MPDCCH set may be transmitted through UE-specific or cell-specific RRC signaling.

In addition, the MPRCCH-startSF-CSS-SCPTM is defined separately for the MPRCCH maximum repeat count value setting parameter, mPDCCH -NumRepetition-SCPTM and the G value setting parameter for defining the start subframe, As shown in FIG.

Or mPDCCH -NumRepetition-Paging set for paging as the maximum number of repetition times of MPDCCH to be applied to configure type-3 CSS (or SC-SS or GSS), and define start subframe Specific value or a cell-specific RRC signaling to define only the G-value setting parameter mPDCCH - startSF -CSS- SCPTM .

Or MPDCCH, the mPDCCH -NumRepetition-SCPTM is separately defined and transmitted through UE-specific or cell-specific RRC signaling, and the corresponding type-3 CSS (or SC-SS or GSS) mcch-duration-r13, sc-mcch-Offset-r13, sc-mcch-Offset-r13, sc-mcch-FirstSubframe-r13, sc- ModificationPeriod-r13. &Lt; / RTI &gt;

Or mPDCCH -NumRepetition-Paging , which is set for paging as the maximum number of repetitive transmission counts of MPDCCH to be applied to configure type-3 CSS (or SC-SS or GSS) SCC-mcch-Offset-r13, sc-mcch-FirstSubframe-r13, and sc-mcch-RepetitionPeriod-r13, which are RRC parameters for the SC- -mcch-duration-r13, and sc-mcch-ModificationPeriod-r13.

In addition, the MPDCCH set for configuring the corresponding type-3 CSS (or SC-SS or GSS) can be defined to apply the distributed type MPDCCH transmission mode.

In the present invention, a MPDCCH or NPDCCH search space configuration method for transmitting / receiving allocation information for a PDSCH including a multicasting control channel SC-MCCH has been proposed. However, since a search space configuration for transmitting a multicast data channel SC- RNTI or the SC-N-RNTI applied portion may be replaced by a G-RNTI.

15 and 16 illustrate a method of transmitting / receiving a multicasting control channel for an NB-IoT terminal according to the present embodiments. FIG. 15 shows a method of receiving a multicasting control channel by an NB-IoT terminal , And FIG. 16 shows a method for a base station to transmit a multicasting control channel for an NB-IoT terminal.

Referring to FIG. 15, the NB-IoT terminal receives setting information related to a separately set NPDCCH search space in order to receive scheduling control information on a multicasting control channel from a base station (S1500).

The NPDCCH search space set to receive the scheduling control information for the multicasting control channel may be a search space defined separately from the search space already defined.

That is, the type-1 public search space for paging defined as the NPDCCH search space, the type-2 public search space for the random access procedure, and the terminal-specific search space for transmitting and receiving the UE-specific data may be separately defined search spaces .

The setting information regarding the separately defined NPDCCH search space may include a maximum number of repetitive transmissions of the NPDCCH, a start subframe setting parameter, and an offset parameter for configuring the NPDCCH search space.

The configuration information regarding the NPDCCH search space can be received via higher layer signaling.

The NB-IoT terminal receives the scheduling control information for the multicasting control channel through the NPDCCH search space configured based on the setting information received from the base station (S1510).

In operation S1520, the NB-IoT UE can receive the multicasting control channel and receive the multicasting control channel based on the received scheduling control information through the separately defined NPDCCH search space.

Referring to FIG. 16, the base station sets up a separate NPDCCH search space for transmitting the scheduling control information for the multicasting control channel for the NB-IoT terminal (S1600).

The NPDCCH search space, which is set separately, is a search defined separately for transmitting / receiving the scheduling control information for the multicasting control channel in addition to the type-1 common search space, the type-2 common search space, and the UE- Space.

In step S1610, the base station transmits configuration information on a separately defined NPDCCH search space to the NB-IoT terminal, and transmits scheduling control information on the multicasting control channel through the NPDCCH search space.

Herein, the base station can transmit setting information related to a separately defined NPDCCH search space through upper layer signaling.

The setting information regarding the separately defined NPDCCH search space may include the maximum number of repetitive transmissions of the NPDCCH, the start subframe setting parameter, and the offset parameter for configuring the NPDCCH search space.

The base station transmits the multicasting control channel to the NB-IoT terminal based on the scheduling control information transmitted through the separately defined NPDCCH search space (S1620).

Therefore, according to the present embodiments, the NPDCCH search space defined separately from the NPDCCH search space defined beforehand is configured, and the scheduling control information for the multicasting control channel is transmitted / received through the NPDCCH search space defined separately, And to transmit / receive a multicasting control channel for the UE.

17 and 18 show a process of transmitting / receiving a multicasting control channel for a BL / CE terminal according to the present embodiment. FIG. 17 shows a method of receiving a multicasting control channel by a BL / CE terminal, 18 shows a method of transmitting a multicasting control channel for a BL / CE terminal by a base station.

Referring to FIG. 17, in step S1700, the BL / CE terminal receives configuration information on a separately set MPDCCH search space to receive scheduling control information on a multicasting control channel from a base station.

Here, the MPDCCH search space set separately for receiving the scheduling control information for the multicasting control channel may be a separately defined search space other than the MPDCCH search space already defined.

That is, the separately set MPDCCH search space includes a search space defined to perform monitoring only when the BL / CE terminal is set to CEModeA, a search space for paging, a search space for a random access procedure, It may be a search space defined separately.

The setting information regarding the MPDCCH search space received from the base station may include the maximum number of repetitive transmissions of the MPDCCH and the start subframe setting parameter for configuring the MPDCCH search space.

The configuration information regarding the separately set MPDCCH search space can be received through the upper layer signaling.

The BL / CE terminal receives the scheduling control information for the multicasting control channel through the separately set MPDCCH search space (S1710). Here, the MPDCCH that transmits the scheduling control information for the multicasting control channel may be transmitted as a distributed type.

The BL / CE terminal receives the multicasting control channel transmitted based on the scheduling control information (S1720).

Referring to FIG. 18, the base station sets up a separate MPDCCH search space for transmitting scheduling control information for the multicasting control channel for the BL / CE terminal (S1800).

The separately set MPDCCH search space may be a separately defined search space other than the already defined MPDCCH search space. That is, it may be a search space defined for monitoring only when the BL / CE terminal is set to CEModeA, a search space for paging, a search space for a random access procedure, and a search space defined separately from a terminal specific search space.

The base station transmits setting information related to the MPDCCH search space separately set to the BL / CE terminal, and transmits scheduling control information for the multicasting control channel through the separately set MPDCCH search space (S1810).

The setting information on the separately set MPDCCH search space may include the maximum number of repeated transmissions of the MPDCCH to configure the MPDCCH search space and the start subframe setting parameter and may be transmitted through the upper layer signaling.

The MPDCCH that transmits the scheduling control information for the multicasting control channel may be transmitted as a distributed type.

The base station transmits the multicasting control channel based on the scheduling control information transmitted through the separately set MPDCCH search space (S1820).

Therefore, according to the present embodiments, the MPDCCH search space is additionally defined in addition to the previously defined MPDCCH search space, and the scheduling control information for the multicasting control channel is transmitted through the MPDCCH search space defined further, Thereby enabling transmission and reception of a multicasting control channel for the UE.

19 is a diagram showing a configuration of a user terminal 1900 according to the present embodiments.

Referring to FIG. 19, a user terminal 1900 according to the present embodiment includes a receiving unit 1910, a control unit 1920, and a transmitting unit 1930.

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

In addition, the controller 1120 configures a search space for transmitting and receiving scheduling control information for the multicasting control channel for the MTC and NB-IoT terminals according to the present invention, and transmits the multicasting control channel to the overall user terminal Lt; RTI ID = 0.0 &gt; 1900 &lt; / RTI &gt;

The transmitter 1930 transmits the uplink control information, data, and a message to the base station through the corresponding channel.

20 is a diagram illustrating a configuration of a base station 2000 according to the present embodiments.

Referring to FIG. 20, a base station 2000 according to the present embodiment includes a control unit 2010, a transmitter 2020, and a receiver 2030.

The control unit 2010 configures a search space for transmitting and receiving scheduling control information for the multicasting control channel for the MTC and the NB-IoT UE according to the present invention and transmits the multicasting control channel to the overall base station 2000 ).

The transmitting unit 2020 and the receiving unit 2030 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

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 (12)

A method for receiving a multicasting control channel (SC-MCCH) by a NB-IoT (Narrowband-Internet of Things)
Receiving configuration information on an NPDCCH search space separately set for an NB-IoT terminal to receive scheduling control information for the multicasting control channel from a base station;
Receiving the scheduling control information for the multicasting control channel through the NPDCCH search space configured based on the setting information; And
And receiving the multicasting control channel based on the scheduling control information,
The separately set NPDCCH search space includes a type-1 common search space for paging defined in advance as an NPDCCH search space for the NB-IoT terminal, a type-2 common search space for a random access procedure, And is defined as a separate NPDCCH search space for supporting SC-PTM, which is distinguished from a UE-specific search space for space and UE-specific data transmission / reception,
Wherein the setting information includes a maximum number of repetitive transmissions of the NPDCCH for configuring the separate NPDCCH search space, a starting subframe setting parameter, and an offset parameter,
The maximum number of repetitive transmissions of the NPDCCH, the start sub-frame setup parameter, and the offset parameters are set for each of a plurality of SC-PTM groups each including one or more NB-IoT terminals and are received for each SC-PTM group through an upper layer signaling Way.
delete delete A method for transmitting a multicasting control channel for an NB-IoT terminal,
Setting a separate NPDCCH search space for an NB-IoT terminal to transmit scheduling control information for the multicasting control channel;
Transmitting the scheduling control information for the multicasting control channel through the NPDCCH search space; And
And transmitting the multicasting control channel based on the scheduling control information,
The separately set NPDCCH search space includes a type-1 common search space for paging defined in advance as an NPDCCH search space for the NB-IoT terminal, a type-2 common search space for a random access procedure, And is defined as a separate NPDCCH search space for supporting SC-PTM, which is distinguished from a UE-specific search space for space and UE-specific data transmission / reception,
The setting information on the NPDCCH search space includes a maximum number of repetitive transmissions of the NPDCCH, a start subframe setting parameter, and an offset parameter for constructing the separate NPDCCH search space,
The maximum number of repetitive transmissions of the NPDCCH, the start sub-frame setup parameters, and the offset parameters are set for each of a plurality of SC-PTM groups including one or more NB-IoT terminals, and are transmitted for each SC-PTM group through upper layer signaling Way.
delete delete In an NB-IoT terminal receiving a multicasting control channel,
A receiving unit for receiving configuration information about an NPDCCH search space separately set for an NB-IoT terminal to receive scheduling control information for the multicasting control channel from a base station; And
And a control unit for checking the scheduling control information for the multicasting control channel through the NPDCCH search space configured based on the setting information and for controlling reception of the multicasting control channel based on the scheduling control information,
The separately set NPDCCH search space includes a type-1 common search space for paging defined in advance as an NPDCCH search space for the NB-IoT terminal, a type-2 common search space for a random access procedure, And is defined as a separate NPDCCH search space for supporting SC-PTM, which is distinguished from a UE-specific search space for space and UE-specific data transmission / reception,
Wherein the setting information includes a maximum number of repetitive transmissions of the NPDCCH for configuring the NPDCCH search space, a starting subframe setting parameter, and an offset parameter,
The maximum number of repetitive transmissions of the NPDCCH, the start sub-frame setup parameter, and the offset parameters are set for each of a plurality of SC-PTM groups each including one or more NB-IoT terminals and are received for each SC-PTM group through an upper layer signaling NB-IoT terminal.
delete delete A base station for transmitting a multicasting control channel for an NB-IoT terminal,
A separate NPDCCH search space for the NB-IoT terminal is set to transmit the scheduling control information for the multicasting control channel, and transmission of the scheduling control information for the multicasting control channel is controlled through the NPDCCH search space ; And
And a transmitter for transmitting the multicasting control channel based on the scheduling control information,
The separately set NPDCCH search space includes a type-1 common search space for paging defined in advance as an NPDCCH search space for the NB-IoT terminal, a type-2 common search space for a random access procedure, And is defined as a separate NPDCCH search space for supporting SC-PTM, which is distinguished from a UE-specific search space for space and UE-specific data transmission / reception,
The setting information on the NPDCCH search space includes a maximum number of repetitive transmissions of the NPDCCH, a start subframe setting parameter, and an offset parameter for constructing the separate NPDCCH search space,
The maximum number of repetitive transmissions of the NPDCCH, the start sub-frame setup parameters, and the offset parameters are set for each of a plurality of SC-PTM groups including one or more NB-IoT terminals, and are transmitted for each SC-PTM group through upper layer signaling Base station.
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