KR20180018997A - Methods for receiving single cell multicast data and Apparatuses thereof - Google Patents

Abstract

The present disclosure relates to a specific method and a device which allows an IoT terminal, necessary for a lower power and a low cost, to receive multicast data. In addition, the present disclosure relates to a method for processing multicast data of a bandwidth reduced low complexity (BL) terminal, a coverage enhancement (CE) terminal or a narrowband-IoT (NB-IoT) terminal, and a device thereof. To this end, one embodiment for a method in which a terminal receives a single cell multicast data comprises the steps of: receiving carrier information for receiving single cell multicast control channel (SC-MCCH) through system information; monitoring SC-MCCH scheduling information on PDCCH by using the carrier information; and receiving the SC-MCCH on the PDSCH on the basis of the SC-MCCH scheduling information. Provided are a method and a device thereof in which a terminal is set to access to a network service in which a channel bandwidth is limited to 200 kHz or less or to operate in a bandwidth limited to 6 PRB.

Description

[0001] The present invention relates to a method for receiving single cell multicast data,

The present disclosure relates to a specific method and apparatus for receiving multicast data by an IoT terminal requiring low power and low cost. The present disclosure also relates to a method and apparatus for processing multicast data of a reduced bandwidth low-rate (BL) terminal, a coverage enhancement (CE) terminal or an NB-IoT (Narrowband-IoT) terminal.

The number of Internet (IoT) devices connected to networks worldwide is increasing rapidly. In this situation, there is a demand for a technique for processing data transmission / reception of a rapidly growing Internet appliance.

Specifically, Internet devices have a large number of devices installed in a wide area, and require low-cost, stable network connections with low power consumption. In addition, the object Internet device may have a characteristic of transmitting and receiving a small amount of data intermittently. Therefore, when conventional LTE or LTE-Advanced technology is applied, unnecessary increase of power consumption or cost increase of the device itself may occur. In addition, there is a limit to support communication for a large number of Internet devices in a limited number of licensed band radio resources.

To solve these problems, NB IoT (Narrowband IoT) technology based on LTE network technology and BL or CE terminal technology are being developed.

Especially, in case of NB IoT, communication is performed using Narrow Band in order to increase device acceptance, reduce power consumption, and reduce cost. Also, we want to provide coverage enhancement effect through data repetitive transmission technique. In addition, there is an increasing demand for terminals capable of operating in a wide coverage area, and a need for studying a data processing method for this has arisen in detail.

Meanwhile, since the conventional NB-IoT terminal, BL terminal, CE terminal, etc. need to operate in a wide coverage with low power, only support for unicast data transmission and reception is available. However, there is a demand for a technique for processing multicast data of the NB-IoT terminal, the BL terminal, and the CE terminal while the multicast data transmission / reception is required for the terminals.

One embodiment disclosed in the above background is to propose a method and an apparatus for processing multicast data of a terminal set to operate in a low power, a narrow band, and a wide coverage, such as an NB-IoT terminal.

According to an embodiment of the present invention, there is provided a method of receiving single cell multicast data by a UE, the method comprising: receiving carrier information for receiving a single cell-multicast control channel (SC-MCCH) Monitoring the SC-MCCH scheduling information on the PDCCH using the step and carrier information, and receiving the SC-MCCH on the PDSCH based on the SC-MCCH scheduling information, wherein the terminal has a channel bandwidth of 200 kHz or less, Service is set to be allowed to access or is set to operate in a bandwidth limited to 6PRB.

According to another aspect of the present invention, there is provided a method of transmitting single cell multicast data by a base station, the method comprising: transmitting carrier information for SC-MCCH reception through system information; The method includes transmitting a PDCCH including SC-MCCH scheduling information to a UE, and transmitting a PDSCH including an SC-MCCH to a UE based on SC-MCCH scheduling information, wherein the UE has a channel bandwidth limited to 200 kHz or less The access to the network service is set to be allowed or set to operate in a bandwidth limited to 6PRB.

In an exemplary embodiment of the present invention, a UE receiving single cell multicast data may include a receiver for receiving carrier information for SC-MCCH reception through system information, and a receiver for receiving carrier information on a PDCCH And a controller for monitoring the SC-MCCH scheduling information, wherein the receiver receives the SC-MCCH on the PDSCH based on the SC-MCCH scheduling information, and the terminal is configured to allow access to the network service whose channel bandwidth is limited to 200 kHz or less Or 6PRB, in a bandwidth limited by the terminal.

In one embodiment, a base station that transmits single cell multicast data transmits carrier information for SC-MCCH reception through system information, and transmits SC-MCCH (Single Cell-Multicast Control Channel And a transmitter for transmitting a PDCCH including scheduling information to a mobile station and transmitting a PDSCH including an SC-MCCH to a mobile station based on the SC-MCCH scheduling information, wherein the mobile station has a channel bandwidth of 200 kHz or less, The access is set to be allowed or the base station apparatus is set to operate in a bandwidth limited to 6PRB.

Through the above-described embodiment, the NB-IoT terminal, the BL terminal, the CE terminal, and the like can efficiently process multicast data traffic using a single-cell point-to-multipoint (SC-PTM) transmission scheme.

1 is a flowchart illustrating a terminal operation according to an exemplary embodiment of the present invention.
2 is a flow chart for explaining a base station operation according to an embodiment.
3 is a diagram illustrating an exemplary structure of a MAC entity according to an exemplary embodiment of the present invention.
4 is a block diagram illustrating a terminal configuration according to an embodiment.
5 is a block diagram illustrating a base station configuration in accordance with one embodiment.

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 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.

In the 3GPP Release-12 and Release-13 documents, BL (A reduced bandwidth low-complexity) terminal and coverage enhancement (CE) terminal technology have been standardized. A low complexity (LC) terminal represents a terminal that is targeted for low-end applications such as low-margin, low-speed, and low-latency applications such as some MTC terminals. 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.

Meanwhile, the 3GPP Release-13 standardized the NB-IoT (Narrowband Internet of Things) technology. 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, ultra low cost terminals, low power consumption and optimized network architecture .

The BL terminal, the CE terminal or the NB-IoT terminal described above are provided with functions for allowing the 3GPP system to quickly penetrate the low-cost IoT market. Accordingly, some functions provided to a general LTE terminal providing mobile broadband service have not been provided. For example, multicast transmission (or MBMS service or SC-PTM transmission) provided for a general terminal for Rel-13 BL terminal, CE terminal or NB-IoT terminal is hereinafter referred to as SC- But the 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 (Multi-cell / Multicast Coordination Entity) 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.

The UE was able to identify the SC-MCCH transmission on the PDCCH using an SC-RNTI (Single Cell 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. In order to receive data using the SC-PTM, the BL terminal or the CE terminal or the NB-IoT terminal must acquire the SC-MCCH and recognize the related SC traffic channel information. In the case of a BL terminal, a CE terminal or an NB-IoT terminal that receives data through repetition, the SC-MCCH can not be obtained by the conventional method. For example, the NB-IoT terminal is provided with only cross-subframe scheduling. Therefore, the NB-IoT terminal could not receive the SC-MCCH.

As described above, in the prior art, multicast transmission provided for a general terminal is not provided for an IoT / MTC terminal (for example, a BL terminal or a CE terminal or an NB-IoT terminal). Therefore, in the case of a BL terminal, a CE terminal or an NB-IoT terminal that receives data through repetition, the SC-MCCH can not be acquired through the conventional technique. Accordingly, when providing software / firmware updates and the like to multiple IoT terminals located in a single area, individual unicast transmissions had to be performed.

It is an object of the present invention to solve such a problem and to provide a method and apparatus for providing multicast transmission to a general terminal for an NB-IoT terminal. In particular, it is an object of the present invention to provide a method and apparatus for acquiring an SC-MCCH by a BL terminal, a CE terminal or an NB-IoT terminal.

Hereinafter, the multicast data receiving method of the BL terminal, the CE terminal or the NB-IoT terminal will be described in detail. In this specification, for convenience of description, a conventional BLT terminal, a CE terminal or an NB-IoT terminal is referred to as a terminal and a conventional LTE terminal to which a technique for low-power and low-cost is not applied is described as a general terminal or an LTE terminal do.

In addition, the downlink control channel (PDCCH) to be described below includes terms that vary depending on each terminal, and should be interpreted to include MPDCCH and NPDCCH. Likewise, in the case of the downlink data channel (PDSCH), the term should be interpreted to encompass MPDSCH, NPDSCH, and the like, covering terms that vary depending on each terminal.

That is, the terms of the channel and data, such as the downlink control channel and the downlink data channel described below, may be variously named according to the category of the terminal (for example, the BL terminal, the CE terminal, and the NB-IoT terminal) , It is used in the meaning including all terms differently named according to the category of each terminal.

Hereinafter, an embodiment of the NB-IoT terminal will be mainly described. This is for convenience of explanation, and BL terminal or CE terminal is also included in the scope of the present invention.

When a UE interested in receiving an MBMS service through the SC-MRB enters a cell broadcasting a system information block type 20 (System Information Block Type 20), the SC-MCCH information acquisition procedure is applied.

In the prior art, a UE can identify an SC-MCCH transmission on a PDCCH using an SC-RNTI (Single Cell RNTI). The SC-RNTI was used for the PDCCH associated with the DL-SCH to address the SC-MCCH broadcast on the DL-SCH. The base station broadcasts information for receiving the SC-MCCH information through the system information block type 20. The information included in the system information block type 20 includes sc-mcch-RepetitionPeriod information defining an interval between transmissions of the SC-MCCH information, sc-mcch-Offset indicating a radio frame on which the SC-MCCH is scheduled, and an SC-MCCH scheduled Sc-mcch-FirstSubframe information indicating the first subframe, and sc-mcch-duration information indicating the duration in which the SC-MCCH can be scheduled starting from the subframe indicated by sc-mcch-FirstSubframe. Table 1 shows the details of this.

In the prior art, a MTC physical downlink control channel (MPDCCH) is used for bandwidth-reduced operations and carries common signaling and terminal-specific signaling. MPDCCH supports RA-RNTI, SI-RNTI, P-RNTI, C-RNTI, Temporary C-RNTI and SPS C-RNTI.

In the prior art, the narrowband physical downlink control channel (NPDCCH) for NB-IoT is located in the available symbols of the configured subframe. NPDCCH supports C-RNTI, Temporary C-RNTI, P-RNTI, and RA-RNTI.

In the prior art, for NB-IoT, the following downlink scheduling technique is applied.

- scheduling information for downlink data is transmitted on the downlink physical control channel (NPDCCH). The scheduled downlink data is transmitted on the shared data channel (NPDSCH).

Only cross-subframe scheduling is provided. Cross-carrier scheduling is not supported. The transmission duration in the number of subframes for NPDCCH and NPDSCH is fluctuating (only cross-subframe scheduling is supported, the transmission duration in subframes for the NPDSCH is the variable- .

- the transmission duration in the number of subframes for NPDCCH is semi-static and for NPDSCH is indicated as part of the scheduling information to be transmitted on the NPDCCH. (The transmission duration in number of subframes is semi-static for the NPDCCH and is indicated for the NPDSCH as part of the scheduling information transmitted on the NPDCCH).

The NPDSCH start time relative to the -NPDCCH is signaled as part of the scheduling message. (The start time of the NPDSCH relative to the NPDCH is signaled as part of the scheduling message.)

1 is a flowchart illustrating a terminal operation according to an exemplary embodiment of the present invention.

A method of receiving single cell multicast data according to an exemplary embodiment of the present invention includes: receiving carrier information for receiving a single cell-multicast control channel (SC-MCCH) through system information; Monitoring the SC-MCCH scheduling information on the PDSCH based on the SC-MCCH scheduling information, and receiving the SC-MCCH on the PDSCH based on the SC-MCCH scheduling information. In addition, the terminal is set to operate in a bandwidth limited to a setting of 6PRB or to allow access to a network service whose channel bandwidth is limited to 200 kHz or less.

Referring to FIG. 1, the UE performs a step of receiving carrier information for receiving a Single Cell-Multicast Control Channel (SC-MCCH) through system information (S110). For example, the terminal may receive a system information block type 20 (System Information Block Type 20). The system information may include various information for SC-MCCH reception of the UE.

In one example, the system information may include a maximum number of repeated transmissions of the PDCCH including SC-MCCH scheduling information. For example, the system information may include information on the maximum number of repetitive transmissions of the PDCCH including the scheduling information such as the subframe in which the SC-MCCH is transmitted. That is, the SC-MCCH scheduling information is received by the UE through the PDCCH, and the UE can repeatedly receive the PDCCH through the maximum number of PDCCH repetitions of the system information to confirm the SC-MCCH scheduling information.

In another example, the system information may include starting sub-frame information of the PDCCH common search space for monitoring SC-MCCH scheduling information. For example, the system information may include information on the common search space of the PDCCH including the SC-MCCH scheduling information. The UE can confirm the SC-MCCH scheduling information by monitoring the common search space by checking the information on the start sub-frame of the common search space of the repeatedly received PDCCH with the system information.

The UE monitors the SC-MCCH scheduling information on the PDCCH using the carrier information (S120). For example, the UE checks at least one of the maximum number of repeated transmissions of the PDCCH including the SC-MCCH scheduling information and the starting subframe information of the common search space through the system information, and confirms the SC-MCCH scheduling information through the PDCCH . As described above, since the SC-MCCH is mapped to the DL-SCH and transmitted to the UE, the UE can receive the SC-MCCH through the PDSCH using the SC-MCCH scheduling information transmitted on the PDCCH. For this, the UE performs monitoring to receive SC-MCCH scheduling information on the PDCCH. Meanwhile, the SC-MCCH scheduling information can be identified using a Single Cell-Radio Network Temporary Identifier (SC-RNTI).

The UE performs a step of receiving the SC-MCCH on the PDSCH based on the SC-MCCH scheduling information (S130). For example, the UE can receive the SC-MCCH on the PDSCH through the identified SC-MCCH scheduling information. As described above, the SC-MCCH can be repeatedly received in a plurality of subframes via the PDSCH.

After that, the UE receives the SC-MCCH single cell multicast control information and can use it to receive the SC-MTCH. The SC-MTCH can also be repeatedly received through a plurality of subframes.

On the other hand, the terminal is set to operate in a bandwidth limited to a setting of 6PRB or to allow access to a network service whose channel bandwidth is limited to 200 kHz or less. For example, the terminal may be an NB-IoT terminal whose channel bandwidth is limited to 200 kHz or less. Alternatively, the terminal may be a BL or CE terminal to the MTC terminal set to operate in a limited bandwidth of 6PRB.

Through the above-described operation, the NB-IoT terminal or the BL / CE terminal can also receive the multicast data from the base station via the SC-PTM.

2 is a flow chart for explaining a base station operation according to an embodiment.

A method of transmitting single cell multicast data according to an exemplary embodiment of the present invention includes: transmitting carrier information for SC-MCCH reception through system information; -MCCH scheduling information to the UE, and transmitting the PDSCH including the SC-MCCH to the UE based on the SC-MCCH scheduling information. In this case, the terminal can be set to operate in a bandwidth limited to 6PRB, or set to allow access to network services whose channel bandwidth is limited to 200kHz or less.

Referring to FIG. 2, the BS may perform a step of transmitting carrier information for SC-MCCH reception through system information (S210). For example, the base station may transmit a system information block type 20 (System Information Block Type 20). The system information may include various information for SC-MCCH reception of the UE.

In one example, the system information may include a maximum number of repeated transmissions of the PDCCH including SC-MCCH scheduling information. For example, the system information may include information on the maximum number of repetitive transmissions of the PDCCH including the scheduling information such as the subframe in which the SC-MCCH is transmitted. That is, the SC-MCCH scheduling information is transmitted to the UE through the PDCCH, and the UE repeatedly receives the PDCCH through the maximum number of PDCCH transmissions of the system information to confirm the SC-MCCH scheduling information.

In another example, the system information may include starting sub-frame information of the PDCCH common search space for monitoring SC-MCCH scheduling information. For example, the system information may include information on the common search space of the PDCCH including the SC-MCCH scheduling information. The UE can confirm the SC-MCCH scheduling information by monitoring the common search space by checking the information on the start sub-frame of the common search space of the repeatedly received PDCCH with the system information.

The base station may perform a step of transmitting a PDCCH including SC-MCCH scheduling information to the UE based on the carrier information (S220). For example, the BS may transmit the SC-MCCH scheduling information through the PDCCH using at least one of the maximum number of repeated transmissions of the PDCCH including the SC-MCCH scheduling information transmitted through the system information and the start subframe information of the common search space Lt; / RTI > As described above, since the SC-MCCH is mapped to the DL-SCH to be transmitted to the UE, the BS transmits the SC-MCCH scheduling information on the PDCCH and transmits the SC-MCCH through the PDSCH indicated by the SC-MCCH scheduling information . For this, the UE performs monitoring to receive SC-MCCH scheduling information on the PDCCH. Meanwhile, the SC-MCCH scheduling information can be identified using a Single Cell-Radio Network Temporary Identifier (SC-RNTI). That is, the base station can transmit SC-MCCH scheduling information by scrambling with the SC-RNTI.

The base station may perform a step of transmitting the PDSCH including the SC-MCCH to the UE based on the SC-MCCH scheduling information (S230). For example, when the UE decodes the SC-MCCH scheduling information, the base station can transmit the SC-MCCH through the corresponding sub-frame and the radio resource by confirming the information such as the sub-frame to which the SC-MCCH is transmitted. As described above, the SC-MCCH is transmitted through the PDSCH and can be repeatedly transmitted through a plurality of subframes. The base station can then transmit the SC-MTCH. The SC-MTCH can also be repeatedly transmitted through a plurality of subframes.

On the other hand, the terminal is set to operate in a bandwidth limited to a setting of 6PRB or to allow access to a network service whose channel bandwidth is limited to 200 kHz or less. For example, the terminal may be an NB-IoT terminal whose channel bandwidth is limited to 200 kHz or less. Alternatively, the terminal may be a BL or CE terminal to the MTC terminal set to operate in a limited bandwidth of 6PRB.

Through the above-described operation, the NB-IoT terminal or the BL / CE terminal can transmit multicast data to the terminal through the SC-PTM.

Various embodiments are further described below. Hereinafter, the NB-IoT terminal will be mainly described, but it can also be applied to the BL or CE terminal as described above. When the following description is applied to the BL or CE terminal, the terms NPDCCH may be applied to MPDCCH, and NPDSCH may be applied to MPDSCH or the like.

1st Example : If the terminal is an SC- RNTI  using PDCCH  SC- MCCH  Identify the transmission and use the SC- MCCH  How to acquire.

If the UE is configured to decode a CRC scrambled PDCCH (hereinafter referred to as a PDCCH but can be an MPDCCH or an NPDCCH) by an SC-RNTI by an upper layer, the UE transmits PDCCH and PDCCH The PDSCH addressed by the PDSCH (hereinafter referred to as the PDSCH for the convenience of description, but it can be either MPDSCH or NPDSCH). The SC-MCCH transmission and the associated radio resources and the MCS can be indicated on the PDCCH.

The BL terminal capable of SC-PTM or the CE terminal or the NB-IoT terminal can receive the SC-MCCH information on the PDSCH / MPDSCH / NPDSCH according to the detailed scheduling information scrambled by the SC-RNTI on the PDCCH / MPDCH / NPDCCH . The base station may send the SC-MCCH information on the associated PDSCH / DL-SCH (with detailed scheduling information scrambled / addressed by the SC-RNTI) on the PDCCH.

The PDSCH start time relative to the PDCCH may be signaled through either the scheduling message, the scheduling information, or the DCI. For example, for an NPDCCH with an NB-IoT DCI format (DCI format N1, N2, etc.) that ends in a subframe n, the terminal transmits an n + k (where k = 5 or k is an integer) And the NPDSCH of the corresponding N consecutive NB-IoT downlink subframes must be decoded. Where the NB-IoT downlink subframe excludes subframes used for SI messages.

As an example of this operation, the base station transmits repeated transmission number information (for example, a maximum number of repetitions for the PDCCH common search space for the SC-MCCH, and a maximum number of repetitions for the uplink PDCCH for indicating the scheduled PDSCH for transmitting the SC- Another valid subframe repetition number for PDCCH common search space for SC-MCCH), transmission occasion information for PDCCH common search space for SC-MCCH, transmission period information for PDCCH common search space for SC-MCCH , Start sub-frame information for the PDCCH common search space for the SC-MCCH, and radio frame information for the PDCCH common search space for the SC-MCCH.

For example, the above-described information may be included in a system information block type 20 (SystemInformationBlockType20 or SystemInformationBlockType20-NB) containing information necessary to obtain control information associated with MBMS transmission using the SC-PTM.

Alternatively, the above-described information may be included in a system information block type 2 (SystemInformationBlockType2 or SystemInformationBlockType2-NB) including radio resource configuration information that is common to all terminals.

Alternatively, the aforementioned information may be indicated to the terminal by dedicated signaling.

Alternatively, the above-described information may be indicated to the terminal by dedicated signaling of the base station at the request of the terminal.

Alternatively, the above-described information can be used by the UE for the transmission duration value in the number of subframes for NPDCCH.

As another example for this operation, the base station may transmit the repeated transmission number information of the PDCCH indicating the scheduled PDSCH that transmits the SC-MCCH information (for example, the maximum number of repetitions for the PDCCH common search space for the SC- The number of valid subframe repetitions for the PDCCH common search space for SC-MCCH) can be provided using sc-mcch-duration information.

As another example for this operation, the base station may define and provide new information that is different from the sc-mcch-RepetitionPeriod information in the transmission period for the PDCCH common search space for the SC-MCCH.

As another example of this operation, the base station can provide the transmission period for the PDCCH common search space for the SC-MCCH using the sc-mcch-RepetitionPeriod information.

As another example of this operation, the base station can provide the starting sub-frame information for the PDCCH common search space for the SC-MCCH using the sc-mcch-FirstSubframe information.

Alternatively, the base station may indicate narrowband index information (e.g., narrowband index information for the PDCCH common search space for the SC-MCCH) for the PDCCH indicating the scheduled PDSCH that transmits the SC-MCCH information have. For example, it may be included in the system information block type 20 (SystemInformationBlockType20 or SystemInformationBlockType20-NB). For another example, this may be indicated to the terminal by dedicated signaling.

The UE decodes the SC-MCCH scheduling information on the PDCCH through the SC-RNTI in the above-mentioned transmission period to obtain detailed scheduling information of the SC-MCCH information. The UE acquires the detailed scheduling information on the PDSCH that transmits the SC-MCCH information on the scrambled / indicated / addressed PDCCH using the SC-RNTI. The UE obtains at least one of the PDSCH start time, the PDSCH subframe repetition number, the transmission repetition number, the transmission duration in the subframe and the effective subframe repetition number relative to the PDCCH through the detailed scheduling information for transmitting the SC-MCCH information, -MCCH information.

Second Example : Through detailed scheduling information in the system information, SC- MCCH  How to acquire.

The SC-MCCH is transmitted every SC-MCCH repetition period. In order to efficiently utilize the SC-MCCH periodically transmitted, the BS can transmit the SC-MCCH for the SC-PTM capable BL terminal or the CE terminal or the NB-IoT terminal without PDCCH.

For example, the BS may transmit an SC-PTM to a BL terminal or a CE terminal on a system information block type 20 (SystemInformationBlockType20 or SystemInformationBlockType20-NB) including information necessary to acquire control information associated with MBMS transmission using an SC- And detailed time or frequency domain scheduling information for receiving MCCH information may be included.

For example, the base station may include narrowband (index) information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

In another example, the base station may include frequency hopping configuration information used to broadcast the SC-MCCH to a BL terminal and a CE supporting terminal via system information block type 20.

For another example, the base station may include the transport block size (TBS) information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20.

In another example, the base station may include OFDM starting symbol information for the PDSCH used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

In another example, the base station may include SC-MCCH window period information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

For another example, the base station may include the SC-MCCH window length used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20.

For example, the base station may transmit the SC-MCCH repetition pattern information (e.g., every second radio frame, every fourth frame, etc.) used for broadcasting the SC-MCCH to the BL terminal and the terminal supporting CE through the system information block type 20 Radio frame). For example, the SC-MCCH repetition pattern may indicate a radio frame within the SC-MCCH repetition period.

In another example, the base station may include radio frame offset information on the SC-MCCH window used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20.

In another example, the base station may include subframe usage pattern information in a radio frame on the SC-MCCH window used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

In another example, the base station may include SC-MCCH valid downlink sub-frame bitmap information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20.

As another example, the BS may transmit an SC-MCCH to the NB-IoT terminal on a system information block type 20 (SystemInformationBlockType20 or SystemInformationBlockType20-NB) including information necessary to acquire control information associated with MBMS transmission using the SC- Detailed time or frequency domain scheduling information for receiving the information may be included.

For example, the BS may include transport block size information used to broadcast the SC-MCCH to the NB-IoT terminal through the system information block type 20.

For another example, the base station may include SC-MCCH window period information used to broadcast the SC-MCCH to the NB-IoT terminal via system information block type 20.

In another example, the base station may include SC-MCCH window length information used to broadcast the SC-MCCH to the NB-IoT terminal via system information block type 20.

In another example, the base station may include SC-MCCH radio frame offset information used to broadcast the SC-MCCH to the NB-IoT terminal via system information block type 20.

In another example, the base station may include at least one of an SC-MCCH first subframe, a subframe offset, and a start subframe information used to broadcast the SC-MCCH to the NB-IoT terminal via the system information block type 20 .

For another example, the base station may include SC-MCCH valid downlink sub-frame bitmap information used to broadcast the SC-MCCH to the NB-IoT terminal via system information block type 20.

For example, the base station may transmit the SC-MCCH repeat pattern information (e.g. every second radio frame, every fourth radio frame) used to broadcast the SC-MCCH to the NB-IoT terminal through the system information block type 20 . For example, the SC-MCCH repeat pattern may indicate a radio frame within the SC-MCCH window period.

In another example, the base station may include OFDM starting symbol information for the PDSCH used to broadcast the SC-MCCH to the NB-IoT terminal via the system information block type 20.

As another example of this, the system information block type 20 described above may be provided as a message (SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) that is independently scheduled and distinguished from a system information block type 20 for a conventional general LTE terminal.

As another example of this, the base station can configure the repetition period for each SC-MTCH through the SC-MCCH window differently.

Hereinafter, the reception operation of the BL terminal, the CE terminal or the NB-IoT terminal will be described.

For example, if the UE enters a cell broadcasting a system information block type 20 (for example, SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the UE transmits the SC-MCCH message from the beginning of the SC- Until successful decoding, it may receive and accumulate an SC-MCCH message (SCPTMConfiguration message) on the DL-SCH on the narrow band provided by narrowband information used to broadcast the SC-MCCH.

In another example, if the UE enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the UE transmits a radio frame based on the SC- MCCH message (SCPTMConfiguration message) on the DL-SCH on the narrow band provided by the narrowband information used to broadcast the SC-MCCH in the subframe according to the subframe information provided by the BS .

In another example, if the UE enters a cell broadcasting a system information block type 20 (for example, SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the UE transmits DL- SCCH message (SCPTMConfiguration message) on the SCH.

In another example, if the UE enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the UE transmits a radio frame based on the SC- MCCH message (SCPTMConfiguration message) on the DL-SCH in a subframe according to the subframe information provided by the BS.

In another example, if the UE enters a cell broadcasting a system information block type 20 (for example, SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the UE transmits DL- SCCH message (SCPTMConfiguration message) on the SCH.

In another example, if the UE enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the UE transmits a radio frame based on the SC- MCCH message (SCPTMConfiguration message) on the DL-SCH in a subframe according to the subframe information provided by the BS.

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB), the terminal may determine the wireless frame offset of the window / Up to the successful decoding of the accumulated SC-MCCH message, except for the subframe used for transmission of NPSS, NSSS, MasterInformationBlock-NB and SystemInformationBlockType1-NB, starting from the radio frame provided in the downlink subframe bitmap SC-MCCH message transmission and accumulate it.

In another example, if decoding from the SC-MCCH message accumulated to the end of the SC-MCCH window is not possible, the terminal repeats receiving and accumulating the SC-MCCH transmission on the DL-SCH in the next SC-MCCH window operation.

In another example, the UE can accumulate SC-MCCH information through a plurality of SC-MCCH windows.

In another example, the UE may accumulate SC-MCCH information over a plurality of SC-MCCH windows within one / same SC-MCCH modification period.

As another example, if the UE reaches the SC-MCCH modification period, the UE can start receiving the SC-MCCH message transmission newly.

As another example, if the UE has received the SC-MCCH information change notification, the UE can start receiving the SC-MCCH message transmission newly.

Third Example : Through detailed scheduling information in the system information, SC- MCCH  How to acquire.

SC-MCCH can be repeatedly transmitted within a predetermined period by specifying a specific transmission period. The base station can transmit the SC-MCCH for the BL terminal capable of SC-PTM capable or the CE terminal or the NB-IoT terminal without PDCCH.

For example, the BS may transmit an SC-PTM to a BL terminal or a CE terminal on a system information block type 20 (SystemInformationBlockType20 or SystemInformationBlockType20-NB) including information necessary to acquire control information associated with MBMS transmission using an SC- And detailed time or frequency domain scheduling information for receiving MCCH information may be included.

For example, the base station may include narrowband (index) information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

In another example, the base station may include frequency hopping configuration information used to broadcast the SC-MCCH to a BL terminal and a CE supporting terminal via system information block type 20.

For another example, the base station may include the transport block size (TBS) information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20.

In another example, the base station may include OFDM starting symbol information for the PDSCH used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

In another example, the base station may include SC-MCCH transmission period / period / repeating period information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal through the system information block type 20.

For example, the base station may transmit at least one of the SC-MCCH transmission duration, the number of iterations, and the number of valid sub-frame iterations to be used for broadcasting the SC-MCCH to the BL terminal and the terminal supporting the CE through the system information block type 20 .

For example, the BS may transmit the SC-MCCH transmission pattern / repetition pattern information (for example, every second radio frame) used to broadcast the SC-MCCH to the BL terminal and the terminal supporting the CE through the system information block type 20 , Every fourth radio frame). For example, the SC-MCCH transmission pattern / repeating pattern may indicate a radio frame within an SC-MCCH transmission period / period.

For another example, the base station may include SC-MCCH radio frame offset information used to broadcast the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20.

In another example, the base station transmits at least one of the SC-MCCH first subframe, subframe offset, and start subframe information used to broadcast the SC-MCCH to the BL terminal and the terminal supporting the CE through system information block type 20 . ≪ / RTI >

In another example, the base station may include an SC-MCCH downlink subframe bitmap / valid downlink subframe bitmap information for broadcasting the SC-MCCH to the BL terminal and the CE supporting terminal via system information block type 20 .

As another example, the BS may transmit an SC-MCCH to the NB-IoT terminal on a system information block type 20 (SystemInformationBlockType20 or SystemInformationBlockType20-NB) including information necessary to acquire control information associated with MBMS transmission using the SC- Detailed time or frequency domain scheduling information for receiving the information may be included.

For example, the BS may include transport block size information used to broadcast the SC-MCCH to the NB-IoT terminal through the system information block type 20.

In another example, the base station may include SC-MCCH transmission period / period / repeating period information used to broadcast the SC-MCCH to the NB-IoT terminal through system information block type 20.

In another example, the base station may include at least one of the SC-MCCH transmission duration, the number of iterations, and the number of valid sub-frame iterations used to broadcast the SC-MCCH to the NB-IoT terminal via the system information block type 20 .

In another example, the base station may include SC-MCCH radio frame offset information used to broadcast the SC-MCCH to the NB-IoT terminal via system information block type 20.

In another example, the base station may include at least one of an SC-MCCH first subframe, a subframe offset, and a start subframe information used to broadcast the SC-MCCH to the NB-IoT terminal via the system information block type 20 .

For another example, the base station may include SC-MCCH valid downlink sub-frame bitmap information used to broadcast the SC-MCCH to the NB-IoT terminal via system information block type 20.

For example, the base station may transmit the SC-MCCH transmission pattern / repeat pattern information (e.g., every second radio frame, every fourth frame) used to broadcast the SC-MCCH to the NB-IoT terminal through the system information block type 20 Radio frame). For example, the SC-MCCH transmission pattern / repeating pattern may indicate a radio frame within the SC-MCCH transmission period.

In another example, the base station may include OFDM starting symbol information for the PDSCH used to broadcast the SC-MCCH to the NB-IoT terminal via the system information block type 20.

As another example of this, the system information block type 20 described above may be provided as a message (SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) that is independently scheduled and distinguished from a system information block type 20 for a conventional general LTE terminal.

Hereinafter, the reception operation of the BL terminal, the CE terminal or the NB-IoT terminal will be described.

For example, if the UE enters a cell broadcasting a system information block type 20 (for example, SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) , And the UE is interested in receiving data via the SC-PTM, or is instructed to receive data), the UE may continue to transmit data from the beginning of the next transmission cycle, or until successful decoding of the accumulated SC- MCCH message (SCPTMConfiguration message) on the DL-SCH on the narrow band provided by the narrowband information used to broadcast the SC-MCCH.

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) And the UE is interested in receiving data via the SC-PTM or is instructed to receive data), the UE uses the SC-MCCH to broadcast from the start of the next transmission cycle to the SC-MCCH transmission duration MCCH message (SCPTMConfiguration message) on the DL-SCH on the narrow band provided by the narrow-band information.

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) And the UE is interested in receiving data via the SC-PTM or is instructed to receive data), the UE provides the radio frame with the SC-MCCH transmission pattern information and the downlink sub-frame bitmap information MCCH message (SCPTMConfiguration message) on the narrow-band DL-SCH provided by the narrowband information used for broadcasting the SC-MCCH in the subframe according to the subframe information.

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) , And the UE is interested in receiving data via the SC-PTM, or is instructed to receive data), the UE may continue to transmit data from the beginning of the next transmission cycle, or until successful decoding of the accumulated SC- It is possible to receive and accumulate an SC-MCCH message (SCPTMConfiguration message) on the DL-SCH.

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) And the UE is interested in receiving data via the SC-PTM or is instructed to receive data), the UE can transmit the SC-PDCH on the DL-SCH from the start of the next transmission period to the SC- MCCH message (SCPTMConfiguration message).

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) And the UE is interested in receiving data via the SC-PTM or is instructed to receive data), the UE provides the radio frame with the SC-MCCH transmission pattern information and the downlink sub-frame bitmap information MCCH message (SCPTMConfiguration message) on the DL-SCH in the subframe according to the subframe information.

In another example, if the terminal enters a cell broadcasting a system information block type 20 (e.g., SystemInformationBlockType20-BR or SystemInformationBlockType20-NB) And the UE is interested in receiving data via the SC-PTM or is instructed to receive data), the UE transmits a radio frame offset of the next transmission cycle / next repetition period / MCCH message with the exception of the subframes used for transmission, starting from the radio frame provided in the frame / valid downlink subframe bitmap, or for transmitting NPSS, NSSS, MasterInformationBlock-NB and SystemInformationBlockType1- Upon receipt of the SC-MCCH message transmission until successful decoding, Can.

As another example, if the UE reaches the SC-MCCH modification period, the UE can start receiving the SC-MCCH message transmission newly.

As another example, if the UE has received the SC-MCCH information change notification, the UE can start receiving the SC-MCCH message transmission newly.

In another example, the UE may accumulate SC-MCCH information over a plurality of SC-MCCH transmission periods within one / same SC-MCCH modification period.

Fourth Example : SC- MCCH  For reception Broadcast HARQ  How to use the process.

3 is a diagram illustrating an exemplary structure of a MAC entity according to an exemplary embodiment of the present invention.

As shown in FIG. 3, the SC-MCCH data applied to the conventional general LTE terminal does not use the HARQ process. SC-MCCH data applied to conventional LTE terminals is received through a DL-SCH and directly transmitted to an upper layer through De Multiplexing. If a broadcast HARQ process is used for SC-MCCH reception, the MAC entity (or terminal) may operate as follows.

For example, the UE may use a broadcast HARQ process for SC-MCCH reception. If downlink control information (downlink scheduling) is received on the PDCCH for the G-RNTI, downlink control information (e.g., one or more of the resource allocation information, the MCS, the number of iterations, and the number of DCI subframe repetitions Information), and a redundancy version to the broadcast HARQ process. The UE can perform the combining for the iterative reception in the broadcast HARQ process.

If the data is successfully decoded, it delivers the decoded MAC PDU to the upper layer.

As another example, the UE may not use the HARQ process for SC-MCCH reception. The UE can perform the combining for the iterative reception in the MAC entity / DL-SCH.

As described above, the present embodiment provides an effect of effectively performing SC-MCCH information on the BL terminal, the CE terminal, or the NB-IoT terminal. Through this, the terminal can efficiently receive the multicast data.

A terminal and a base station apparatus capable of performing a part or all of the embodiments described with reference to Figs. 1 to 3 will be described with reference to the drawings.

4 is a block diagram illustrating a terminal configuration according to an embodiment.

Referring to FIG. 4, the UE 400 receiving the single cell multicast data includes a receiver 430 for receiving carrier information for SC-MCCH reception through system information, And a controller 410 for monitoring the SC-MCCH scheduling information on the PDCCH using the SC-MCCH scheduling information. The receiver 430 receives the SC-MCCH on the PDSCH based on the SC-MCCH scheduling information. The terminal 400 is set to operate in a bandwidth limited to 6PRB or set to allow access to a network service whose channel bandwidth is limited to 200 kHz or less.

In addition, the receiver 430 may receive carrier information for SC-MCCH reception through a system information block type 20 (System Information Block Type 20). The system information may include various information for SC-MCCH reception of the UE.

In one example, the system information may include a maximum number of repeated transmissions of the PDCCH including SC-MCCH scheduling information. For example, the system information may include information on the maximum number of repetitive transmissions of the PDCCH including the scheduling information such as the subframe in which the SC-MCCH is transmitted. That is, the SC-MCCH scheduling information is received by the UE 400 through the PDCCH, and the UE 400 can repeatedly receive the PDCCH through the maximum number of PDCCH repetitions of the system information to confirm the SC-MCCH scheduling information.

In another example, the system information may include starting sub-frame information of the PDCCH common search space for monitoring SC-MCCH scheduling information. For example, the system information may include information on the common search space of the PDCCH including the SC-MCCH scheduling information. The control unit 410 can check the SC-MCCH scheduling information by monitoring the common search space by checking the information on the start sub-frame of the common search space of the repeatedly received PDCCH with the system information.

Also, the control unit 410 checks at least one of the maximum number of repeated transmissions of the PDCCH including the SC-MCCH scheduling information and the starting subframe information of the common search space through the system information, and transmits the SC-MCCH scheduling information through the PDCCH Can be confirmed. As described above, since the SC-MCCH is mapped to the DL-SCH and transmitted to the UE 400, the UE 400 receives the SC-MCCH through the PDSCH using the SC-MCCH scheduling information transmitted on the PDCCH . To this end, the control unit 410 performs monitoring to receive SC-MCCH scheduling information on the PDCCH. Meanwhile, the SC-MCCH scheduling information can be identified using a Single Cell-Radio Network Temporary Identifier (SC-RNTI).

In addition, the control unit 410 effectively receives the multicast data through the SC-PTM transmission scheme necessary for performing the above-described embodiments and transmits the multicast control information to the overall operation of the terminal 400 .

Meanwhile, the receiver 430 may receive the SC-MCCH on the PDSCH through the identified SC-MCCH scheduling information. As described above, the SC-MCCH can be repeatedly received in a plurality of subframes via the PDSCH.

Also, the receiver 430 can receive the SC-MTCH by receiving the single cell multicast control information of the SC-MCCH. The SC-MTCH can also be repeatedly received through a plurality of subframes.

In addition, the receiver 430 receives downlink control information, data, and messages from the base station through the corresponding channel. The transmitter 420 transmits uplink control information, data, and a message to the base station through the corresponding channel.

5 is a block diagram illustrating a base station configuration in accordance with one embodiment.

Referring to FIG. 5, a BS 500 for transmitting single cell multicast data transmits carrier information for SC-MCCH (Single Cell-Multicast Control Channel) reception through system information, And a transmitter 520 for transmitting a PDCCH including the MCCH scheduling information to the UE and transmitting a PDSCH including the SC-MCCH to the UE based on the SC-MCCH scheduling information. In this case, the terminal is set to operate in a bandwidth limited to 6PRB or set to allow access to a network service whose channel bandwidth is limited to 200 kHz or less.

For example, the transmitter 520 may transmit a System Information Block Type 20 (System Information Block Type 20). The system information may include various information for SC-MCCH reception of the UE.

In one example, the system information may include a maximum number of repeated transmissions of the PDCCH including SC-MCCH scheduling information. For example, the system information may include information on the maximum number of repetitive transmissions of the PDCCH including the scheduling information such as the subframe in which the SC-MCCH is transmitted. That is, the SC-MCCH scheduling information is transmitted to the UE through the PDCCH, and the UE repeatedly receives the PDCCH through the maximum number of PDCCH transmissions of the system information to confirm the SC-MCCH scheduling information.

In another example, the system information may include starting sub-frame information of the PDCCH common search space for monitoring SC-MCCH scheduling information. For example, the system information may include information on the common search space of the PDCCH including the SC-MCCH scheduling information. The UE can confirm the SC-MCCH scheduling information by monitoring the common search space by checking the information on the start sub-frame of the common search space of the repeatedly received PDCCH with the system information.

In addition, the transmitter 520 may use at least one of the maximum number of repeated transmissions of the PDCCH including the SC-MCCH scheduling information transmitted through the system information and the starting subframe information of the common search space, and transmit the SC-MCCH scheduling information Can be transmitted. As described above, since the SC-MCCH is mapped to the DL-SCH and transmitted to the UE, the BS 500 transmits the SC-MCCH scheduling information on the PDCCH, and transmits the SC- MCCH can be transmitted. For this, the UE performs monitoring to receive SC-MCCH scheduling information on the PDCCH. Meanwhile, the SC-MCCH scheduling information can be identified using a Single Cell-Radio Network Temporary Identifier (SC-RNTI). That is, the control unit 510 can transmit SC-MCCH scheduling information by scrambling with the SC-RNTI.

In addition, when the UE decodes the SC-MCCH scheduling information, the transmitter 520 can transmit the SC-MCCH through the corresponding sub-frame and the radio resource after confirming the information such as the sub-frame to which the SC-MCCH is transmitted. As described above, the SC-MCCH is transmitted through the PDSCH and can be repeatedly transmitted through a plurality of subframes. Then, the transmitter 520 can transmit the SC-MTCH. The SC-MTCH can also be repeatedly transmitted through a plurality of subframes.

In addition to this, the control unit 510 transmits the multicast data through the SC-PTM transmission method, which is necessary for performing the above-described embodiments, and transmits the multicast control information to the terminal through the overall base station 500, .

The transmission unit 520 and the reception 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 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 disclosure, and various modifications and changes may be made without departing from the essential characteristics of the present invention by those skilled in the art. Therefore, the embodiments are intended to illustrate and not limit the technical spirit of the present disclosure, and the scope of the technical idea of the present disclosure is not limited by these embodiments. The scope of protection of the present disclosure should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as being included in the scope of the present disclosure.

Claims (20)

A method for a terminal to receive single cell multicast data,
Receiving carrier information for reception of an SC-MCCH (Single Cell-Multicast Control Channel) through system information;
Monitoring SC-MCCH scheduling information on the PDCCH using the carrier information; And
Receiving the SC-MCCH on a PDSCH based on the SC-MCCH scheduling information,
The terminal,
Wherein the channel bandwidth is set to allow access to network services limited to 200 kHz or less or to operate at a bandwidth limited to 6PRB. The method according to claim 1,
The system information includes:
(SystemInformationBlockType20). ≪ / RTI > The method according to claim 1,
The system information includes:
And the maximum number of repetitive transmissions of the PDCCH including the SC-MCCH scheduling information. The method according to claim 1,
The system information includes:
And starting sub-frame information of a PDCCH common search space for monitoring the SC-MCCH scheduling information. The method according to claim 1,
The SC-MCCH scheduling information includes:
SCN-RNTI (Single Cell-Radio Network Temporary Identifier). A method for a base station to transmit single cell multicast data,
Transmitting carrier information for reception of an SC-MCCH (Single Cell-Multicast Control Channel) through system information;
Transmitting a PDCCH including SC-MCCH scheduling information to a mobile station based on the carrier information; And
And transmitting the PDSCH including the SC-MCCH to the UE based on the SC-MCCH scheduling information,
The terminal,
Wherein the channel bandwidth is set to allow access to network services limited to 200 kHz or less or to operate at a bandwidth limited to 6PRB. The method according to claim 6,
The system information includes:
(SystemInformationBlockType20). ≪ / RTI > The method according to claim 6,
The system information includes:
And the maximum number of repeated transmissions of the PDCCH including the SC-MCCH scheduling information. The method according to claim 6,
The system information includes:
Wherein the UE includes start subframe information of a PDCCH common search space for monitoring the SC-MCCH scheduling information. The method according to claim 6,
The SC-MCCH scheduling information includes:
SCN-RNTI (Single Cell-Radio Network Temporary Identifier). In a terminal receiving single cell multicast data,
A receiving unit for receiving carrier information for receiving an SC-MCCH (Single Cell-Multicast Control Channel) through system information; And
And a controller for monitoring SC-MCCH scheduling information on the PDCCH using the carrier information,
The receiver may further comprise:
Receiving the SC-MCCH on the PDSCH based on the SC-MCCH scheduling information,
The terminal,
A terminal whose channel bandwidth is set to allow access to network services restricted to 200 kHz or less or to operate at a bandwidth limited to 6PRB. 12. The method of claim 11,
The system information includes:
And a system information block type 20 (System Information Block type 20). 12. The method of claim 11,
The system information includes:
And the maximum number of repetitive transmissions of the PDCCH including the SC-MCCH scheduling information. 12. The method of claim 11,
The system information includes:
And starting sub-frame information of a PDCCH common search space for monitoring the SC-MCCH scheduling information. 12. The method of claim 11,
The SC-MCCH scheduling information includes:
SCN-RNTI (Single Cell-Radio Network Temporary Identifier). 1. A base station for transmitting single cell multicast data,
And transmits carrier information for reception of SC-MCCH (Single Cell-Multicast Control Channel) through system information,
Transmits a PDCCH including SC-MCCH scheduling information to the UE based on the carrier information,
And a transmitter for transmitting a PDSCH including the SC-MCCH to the UE based on the SC-MCCH scheduling information,
The terminal,
The base station is set to operate in a bandwidth limited to 6PRB or set to allow access to network services whose channel bandwidth is limited to 200kHz or less. 17. The method of claim 16,
The system information includes:
(System Information Block Type 20). 17. The method of claim 16,
The system information includes:
And the maximum number of repeated transmissions of the PDCCH including the SC-MCCH scheduling information. 17. The method of claim 16,
The system information includes:
Wherein the UE includes start subframe information of a PDCCH common search space for monitoring the SC-MCCH scheduling information. 17. The method of claim 16,
The SC-MCCH scheduling information includes:
SCN-RNTI (Single Cell-Radio Network Temporary Identifier).

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