KR20170036597A - Method and apparatus for configuring frame of unlicensed band - Google Patents

Abstract

A communication node configures an unlicensed band transmission burst including a plurality of sub-frames in consideration of a channel occupation state of an unlicensed band and transmits the unlicensed band transmission burst through the unlicensed band. At this time, at least one sub frame of the plurality of sub-frames has a different type from the other sub-frames.

Description

METHOD AND APPARATUS FOR CONFIGURING FRAME OF UNLICENSED BAND BACKGROUND OF THE INVENTION [0001]

The present invention relates to a method and an apparatus for configuring a license-exempt band frame, and more particularly to a technique for flexibly configuring a frame structure of a license-exempt band cell and signaling the constructed frame structure.

With the development of information and communication technology, various wireless communication technologies are being developed. Wireless communication technology is broadly classified into wireless communication technology using a licensed band and wireless communication technology using an unlicensed band (for example, industrial scientific medical) . Since licenses are licensed exclusively to one operator, wireless communication technologies that use licensed bands can provide better reliability and better communication quality than wireless licensed technologies that use license-exempt bands.

(LTE), long term evolution (LTE) defined in 3GPP (Third Generation Partnership Project) standard, and the like, and a base station (NodeB, NB) and a user equipment , ≪ / RTI > UE) can send and receive signals through the licensed band.

A wireless local area network (WLAN) defined by the IEEE 802.11 standard, and an access point (AP) and a station (STA) supporting the WLAN are each a license-exempt band Lt; RTI ID = 0.0 > and / or < / RTI >

On the other hand, mobile traffic has been exploding recently, and it is necessary to secure an additional license band to process mobile traffic through the license band. However, since the licensed band is finite and the licensed band can be secured through auctions in the frequency bands between operators, it can be costly to secure additional license bands. In order to solve this problem, it is possible to consider providing LTE services through the license-exempt band.

The license-exempt band cell, which is composed of the license-exempt band, has different characteristics from the existing license band cell. Opportunistically occupies the channel and can not occupy the channel over a period of time. In addition, there is no backward compatibility problem unlike the license band, so that a new structure of a subframe is possible. Therefore, the frame structure of the license-exempt band cell can be configured differently from the license band.

A problem to be solved by the present invention is to provide a method and an apparatus for configuring a license-exempt band frame capable of providing services of a license band through a license-exempt band.

The present invention also provides a method and an apparatus for configuring a license-exempt band frame in which signaling is performed so that the terminal can recognize the structure of the license-exempt band frame.

According to one embodiment of the present invention, a method of constructing an unlicensed band frame at a communication node is provided. Claims [1] A method of configuring a license-exempt band frame comprises constructing a license-exempt band transmission burst considering a channel occupancy state of a license-exempt band, and transmitting the license-exclusion band transmission burst through a license-exempt band, Wherein at least one subframe of the plurality of subframes is a subframe of a different type from the remaining subframes.

The method for constructing the license-exempt band frame may further include adding a license-exempt band signal to a start position of the license-exclusion band transmission burst.

The at least one subframe may include a partial subframe having a shorter time length than the remaining subframes.

The remaining subframe includes a plurality of symbols in the time domain, and the partial subframe may not transmit a signal for the first or last partial time among the time lengths of the remaining subframes.

The at least one subframe may be an uplink subframe and the remaining subframe may be a downlink subframe.

The at least one subframe may include a subframe in which a symbol in which a cell-specific reference signal (CRS) exists and a non-existent symbol are mixed.

The at least one subframe may include a subframe in which a DRS (Discovery Reference Signal) is multiplexed with a PDSCH (Physical Downlink Shared Channel).

The at least one subframe may include an uplink subframe including only a physical uplink control channel (PUCCH).

The at least one subframe may include a sub-frame including a Primary Synchronization Signal (PSS) / a Secondary Synchronization Signal (SSS).

The method of constructing the license-exempt band frame may further include the step of signaling information of the sub-frames constituting the license-exclusion band transmission burst.

The information includes at least one of a number of symbols including a CRS included in a subframe, information on a last subframe of the license-exempt band transmission burst, a number of symbols constituting the partial subframe, a number of subframes of the license- The number of subframes remaining in the currently-transmitted license-exempt band transmission burst, the number of subframes of the next license-exiting band transmission burst, the number of subframes of the CSI-RS (Channel State Information-Reference Signal) / CSI-IM (Channel State Information-Interference Measurement), and transmission power of the CRS / CSI-RS.

The signaling may include a physical HARQ indicator channel (PHICH) defined for uplink HARQ (Hybrid Automatic Repeat reQuest) feedback, a Unlicensed Cell-Radio Network Temporary Identifier (U-RNTI) associated with a license- And transmitting the information using at least one of the information.

The signaling may comprise transmitting the information in a combination of one or more of a PHICH group, a PHICH sequence and a PHICH information bit.

According to another embodiment of the present invention, an apparatus for configuring an unlicensed band of a communication node is provided. The license-exempt band framing device includes a processor and a transceiver. The processor constructs a license-exempt band transmission burst for continuously checking a channel occupation state of a license-exempt band and continuously transmits a plurality of sub-frames, and generates signaling information for informing information of sub-frames of the license-exclusion band transmission burst. The transceiver is connected to the network and transmits the license-exempt band transmission burst and signaling information. At this time, at least one subframe of the plurality of subframes is a subframe of a different type from the remaining subframes.

The at least one subframe includes a downlink subframe including a synchronization signal, and the remaining subframe may include a downlink subframe including no synchronization signal.

The at least one subframe includes a DL subframe in which a DRS (Discovery Reference Signal) is multiplexed with a PDSCH (Physical Downlink Shared Channel), and the remaining subframe includes a DL subframe . ≪ / RTI >

The at least one subframe may be an uplink subframe and the remaining subframe may be a downlink subframe.

The at least one subframe may include a partial subframe having a shorter time length than the remaining subframes.

The signaling information includes a number of symbols including a cell-specific reference signal (CRS) included in a subframe, information on a last subframe of the license-exempt band transmission burst, a number of symbols constituting the partial subframe, The number of subframes of the burst, the number of subframes that do not need to monitor the control channel region since the currently transmitted license-exclusion band transmission burst is terminated, the number of remaining subframes of the license-released bandwidth transmission burst being currently transmitted, (Channel State Information-Reference Signal) / CSI-IM (Channel State Information-Interference Measurement), and a CRS / CSI-RS transmission power.

The processor includes a physical HARQ indicator channel (PHICH) defined for uplink HARQ (Hybrid Automatic Repeat reQuest) feedback, a Unlicensed Cell-Radio Network Temporary Identifier (U-RNTI) associated with a license- The signaling information may be generated using at least one of the signaling information.

According to an embodiment of the present invention, there is an effect that a frame structure of a license-exempt band cell can be flexibly configured by providing various types of unlicensed band subframe structures and signaling for the terminal to recognize the corresponding subframe structure.

1 is a diagram illustrating an example of a wireless communication network to which an embodiment of the present invention is applied.
2 is a diagram illustrating another example of a wireless communication network to which an embodiment of the present invention is applied.
3 is a diagram illustrating another example of a wireless communication network to which an embodiment of the present invention is applied.
4 is a diagram illustrating another example of a wireless communication network to which an embodiment of the present invention is applied.
5 is a diagram illustrating a communication node constituting a wireless communication network to which an embodiment of the present invention is applied.
6 is a diagram illustrating an example of a downlink subframe used in the LTE / LTE-A system.
7 is a diagram illustrating a method of activating or deactivating a license-exempt band cell according to an embodiment of the present invention.
8 is a diagram illustrating an example of a downlink scheduling method of a license-exempt band cell according to an embodiment of the present invention.
9 is a diagram illustrating an example of a license-exempt band transmission burst according to an embodiment of the present invention.
10 and 11 are diagrams showing an example of a license-exempt band transmission burst composed only of downlink sub-frames according to an embodiment of the present invention.
12 is a diagram illustrating an example of a license-exempt band transmission burst including a subframe in which a license-exempt band DRS and a PDSCH are multiplexed according to an embodiment of the present invention.
13 is a diagram illustrating an example of an unlicensed bandwidth transmission burst including a CRS-included symbol and a subframe including a CRS-free symbol according to an embodiment of the present invention.
14 and 15 are diagrams illustrating an example of an unlicensed band transmission burst composed of a DL subframe and an UL subframe according to an embodiment of the present invention.
16 is a diagram illustrating an example of a license-exempt band transmission burst in which the PSS / SSS is not included according to the embodiment of the present invention.
17 shows another example of a license-exempt band transmission burst according to an embodiment of the present invention, in which a subframe including a PSS / SSS is transmitted in a subframe index different from subframe indexes 0 and 5 .
18 is a diagram illustrating an apparatus for constructing a license-exempt band according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

Throughout the specification, a terminal is referred to as a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (HR- A subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE) , HR-MS, SS, PSS, AT, UE, and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, ), An access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, a relay station (RS), a relay node (RN) serving as a base station, an advanced relay station (ARS) serving as a base station, a high reliability relay station (HR- A femto BS, a home Node B, a home eNodeB, a pico BS, a metro BS, a micro BS, Etc.) or all or some of the ABS, Node B, eNodeB, AP, RAS, BTS, MMR-BS, RS, RN, ARS, HR- There's also an included feature.

Now, a method and an apparatus for constructing a license-exempt band frame according to an embodiment of the present invention will be described in detail with reference to the drawings.

First, a wireless communication network to which an embodiment of the present invention is applied will be described. These embodiments are not limited to the wireless communication network described below, but can be applied to various wireless communication networks.

1 is a diagram illustrating an example of a wireless communication network to which an embodiment of the present invention is applied.

Referring to FIG. 1, a first base station 110 may be a cellular communication (e.g., long term evolution (LTE), advanced (LTE-A), LTE- U (unlicensed), etc.] can be supported. The first base station 110 may include multiple input multiple output (MIMO), multiple user (MU), multiple user (MU), massive MIMO, etc., CoMP And support carrier aggregation (CA). The first base station 110 may operate in a licensed band F1 and form a macro cell. The first base station 110 may be connected to other base stations such as the second base station 120 and the third base station 130 via an ideal backhaul or a non-idle backhaul.

The second base station 120 may be located within the coverage of the first base station 110. The second base station 120 may operate in an unlicensed band F3 and may form a small cell. The third base station 130 may be located within the coverage of the first base station 110. The third base station 130 may operate in the license-exempt band F3 and may form a small cell. Each of the second base station 120 and the third base station 130 may support a wireless local area network (WLAN) defined in the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard. Each of the terminals (not shown) connected to the first base station 110 and the first base station 110 can transmit and receive signals through the CA between the license band F1 and the license-exempt band F3.

2 is a diagram illustrating another example of a wireless communication network to which an embodiment of the present invention is applied.

Referring to FIG. 2, each of the first base station 210 and the second base station 220 may support cellular communication. Each of the first base station 210 and the second base station 220 may support MIMO (e.g., SU-MIMO, MU-MIMO, large-scale MIMO, etc.), CoMP, Each of the first base station 210 and the second base station 220 may operate in the license band F1 and form a small cell. Each of the first base station 210 and the second base station 220 may be located within the coverage of the base station forming the macrocell. The first base station 210 may be connected to the third base station 230 via an idle backhaul or a non-idle backhaul. The second base station 220 may be coupled to the fourth base station 240 via an idle backhaul or a non-idle backhaul.

The third base station 230 may be located within the coverage of the first base station 210. The third base station 230 may operate in the license-exempt band F3 and may form a small cell. The fourth base station 240 may be located within the coverage of the second base station 220. The fourth base station 240 may operate in the license-exempt band F3 and form a small cell. Each of the third base station 230 and the fourth base station 240 may support a WLAN defined by the IEEE 802.11 standard. The terminals connected to the first base station 210 and the first base station 210 and the terminals connected to the second base station 220 and the second base station 220 are connected to the CA Lt; RTI ID = 0.0 > and / or < / RTI >

3 is a diagram illustrating another example of a wireless communication network to which an embodiment of the present invention is applied.

Referring to FIG. 3, each of the first base station 310, the second base station 320, and the third base station 330 may support cellular communication. Each of the first base station 310, the second base station 320, and the third base station 330 may support MIMO, CoMP, CA, and the like. The first base station 310 may operate in the license band F1 and may form macro cells. The first base station 310 may be connected to another base station, for example, the second base station 320, the third base station 330, etc. through an idle backhaul or a non-idle backhaul. The second base station 320 may be located within the coverage of the first base station 310. The second base station 320 may operate in the license band F1 and form a small cell. The third base station 330 may be located within the coverage of the first base station 310. The third base station 330 may operate in the license band F1 and form a small cell.

The second base station 320 may be coupled to the fourth base station 340 via an idle backhaul or a non-idle backhaul. The fourth base station 340 may be located within the coverage of the second base station 320. The fourth base station 340 can operate in the license-exempt band F3 and form a small cell. The third base station 330 may be connected to the fifth base station 350 via an idle backhaul or a non-idle backhaul. The fifth base station 350 may be located within the coverage of the third base station 330. The fifth base station 350 may operate in the license-exempt band F3 and may form a small cell. Each of the fourth base station 340 and the fifth base station 350 may support the WLAN defined in the IEEE 802.11 standard.

(Not shown) connected to the first base station 310, the second base station 320 and the second base station 320 connected to the first base station 310, the third base station 330, And a terminal (not shown) connected to the third base station 330 can transmit and receive signals through the CA between the license band F1 and the license-exempt band F3.

4 is a diagram illustrating another example of a wireless communication network to which an embodiment of the present invention is applied.

Referring to FIG. 4, each of the first base station 410, the second base station 420, and the third base station 430 may support cellular communication. The first base station 410, the second base station 420, and the third base station 430 may support MIMO, CoMP, CA, and the like. The first base station 410 may operate in the license band F1 and may form macro cells. The first base station 410 may be connected to another base station, for example, the second base station 420, the third base station 430, or the like through an idle backhaul or a non-idle backhaul. The second base station 420 may be located within the coverage of the first base station 410. The second base station 420 may operate in the license band F2 and may form a small cell. The third base station 430 may be located within the coverage of the first base station 410. The third base station 430 may operate in the license band F2 and may form a small cell. Each of the second base station 420 and the third base station 430 may operate in a license band F2 different from the license band F1 in which the first base station 410 operates.

The second base station 420 may be coupled to the fourth base station 440 via an idle backhaul or a non-idle backhaul. The fourth base station 440 may be located within the coverage of the second base station 420. The fourth base station 440 may operate in the license-exempt band F3 and may form a small cell. The third base station 430 may be connected to the fifth base station 450 through an idle backhaul or a non-idle backhaul. The fifth base station 450 may be located within the coverage of the third base station 430. The fifth base station 450 may operate in the license-exempt band F3 and form a small cell. Each of the fourth base station 440 and the fifth base station 450 may support a WLAN defined in the IEEE 802.11 standard.

Each of the terminals (not shown) connected to the first base station 410 and the first base station 410 can transmit and receive signals through the CA between the license band F1 and the license-exempt band F3. (Not shown) connected to the second base station 420, the second base station 420, the third base station 430 and the third base station 430, respectively, And the license-exempt zone (F3).

The communication nodes constituting the wireless communication network described above, that is, the base station and the terminal, can transmit signals based on a listen before talk (LBT) procedure in an unlicensed band. According to the LBT, the communication node confirms the channel occupancy state of the license-exempt band by performing an energy detection operation, and transmits a signal when the channel is determined to be in an idle state. At this time, the communication node can transmit a signal when the channel is in a non-occupied state during a contention window according to a random backoff operation. On the other hand, the communication node may not transmit a signal if it is determined that the channel is busy. The basic unit of the Clear Channel Assessment (CCA) can be defined as a slot. The communication node can occupy the channel when the channel is in the non-occupied state by checking the occupied state of the channel during the fixed length CCA or a fixed number of slots. Alternatively, the communication node can randomly select a positive integer and check the channel occupation state by the number of slots of the selected value to occupy the channel when the channel is in an unoccupied state. In this case, a range for selecting a random value is defined as a contention window. Here, the size of the collision window may be defined as a fixed value or may be defined as a variable value. If a variable value is defined, the criterion for changing the size of the collision window can be defined differently. As an example of the variable value change criterion, occupancy state information of a channel to be used (for example, a time or a ratio or a share rate in which a signal of a certain level or higher exists, etc.), the number of communication nodes using the same channel, The size of the collision window can be varied by using at least one of various information such as ACK / NACK, collision information, detection information of other communication nodes, and the like.

The communication node may transmit a signal based on a carrier sensing adaptive transmission (CSAT) procedure. That is, the communication node can transmit a signal based on a preset duty cycle. The communication node may transmit a signal if the current duty cycle is a duty cycle assigned for a communication node that supports cellular communication. On the other hand, the communication node may not transmit a signal if the current duty cycle is the duty cycle allocated for the communication node supporting communications other than cellular communication (e.g., WLAN, etc.). The duty cycle can be adaptively determined based on the number of communication nodes supporting the WLAN existing in the license-exempt band, the usage state of the license-exempt band, and the like.

The communication node may perform discontinuous transmission in the license-exempt band. For example, if the maximum transmission duration or the maximum channel occupancy time (maximum COT) is set in the license-exempt band, the communication node can transmit signals within the maximum transmission period, If all the signals can not be transmitted within the maximum transmission period, the remaining signals can be transmitted in the next maximum transmission period. In addition, the communication node can select a carrier having a relatively small interference in the license-exempt band, and can operate on the selected carrier wave. In addition, when the communication node transmits a signal in the license-exempt band, it can adjust the transmission power to reduce interference to other communication nodes.

Meanwhile, the communication node may be a communication protocol based on a code division multiple access (CDMA) communication protocol, a communication protocol based on a wideband CDMA (WCDMA), a communication protocol based on a time division multiple access (TDMA), a communication protocol based on a frequency division multiple access , An SC (single carrier) -FDMA communication protocol, an orthogonal frequency division multiplexing (OFDM) based communication protocol, and an orthogonal frequency division multiple access (OFDMA) based communication protocol.

5 is a diagram illustrating a communication node constituting a wireless communication network to which an embodiment of the present invention is applied.

Referring to FIG. 5, the communication node 500 may include at least one processor 510, a memory 520, and a transceiver 530 connected to a network to perform communication. The communication node 500 may further include an input interface device 540, an output interface device 550, a storage device 560, and the like. Each of the components included in the communication node 500 may be connected by a bus 570 to communicate with each other.

The processor 510 may execute a program command stored in at least one of the memory 520 and the storage device 560. The processor 510 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods in accordance with embodiments of the present invention are performed. Each of the memory 520 and the storage device 560 may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 520 may be comprised of at least one of read only memory (ROM) and random access memory (RAM).

Next, the operation methods of the communication node in the wireless communication network will be described. Even if a method (e.g., transmission or reception of a signal) to be performed at the first communication node among the communication nodes is described, the corresponding second communication node is controlled by a method corresponding to the method performed at the first communication node For example, receiving or transmitting a signal). That is, when the operation of the terminal is described, the corresponding base station can perform an operation corresponding to the operation of the terminal. Conversely, when the operation of the base station is described, the corresponding terminal can perform an operation corresponding to the operation of the base station.

6 is a diagram illustrating an example of a downlink subframe used in the LTE / LTE-A system.

Referring to FIG. 6, in an LTE system, which is a typical mobile communication system, one radio frame includes 10 subframes # 0 to # 9 having a length of 1 ms in the time domain.

In the LTE system, a transmission time interval (TTI) is used as a minimum time unit for transmitting data, and is set equal to the length of one subframe. That is, the TTI has a time length of 1 ms.

Each of the subframes # 0 to # 9 is composed of two slots # S0 and # S1, and each of the slots # S0 and # S1 has a length of 0.5 ms. The slots # S0 and # S1 include a plurality of symbols in the time domain and a plurality of resource blocks (RB) in the frequency domain. One RB includes a plurality of subcarriers in the frequency domain. Symbol may be referred to as an Orthogonal Frequency Division Multiplex (OFDM) symbol, an OFDMA symbol, an SC-FDMA symbol, or the like according to a multiple access scheme. The number of symbols included in one slot can be variously changed according to the channel bandwidth or the length of the CP (Cyclic Prefix). For example, in the case of a normal CP, one slot includes seven symbols, while in the case of an extended CP, one slot includes six symbols.

The DL subframe may be divided into a control channel region and a data channel region in a time domain. A Physical Downlink Control Channel (PDCCH), a Physical Control Format Indicator Channel (PCFICH), a physical hybrid automatic repeat request indicator channel (PHICH), and the like may be allocated to the control channel region of the licensed band cell. The data channel region includes a PDSCH (Physical Downlink Shared Channel) for transmitting downlink data. An enhanced physical downlink control channel (EPDCCH) may be allocated to a part of the data channel region. The PDCCH transmits the PDSCH resource allocation and the PUSCH resource allocation information.

The first symbol in the subframe includes a PCFICH for transmitting the number of symbols used for control channel transmission. Also, the control channel region may include a PHICH for transmitting an HARQ (Hybrid Automatic Repeat reQuest) ACK / NACK (acknowledgment / negative-acknowledgment) signal, which is response information for uplink transmission. PDCCH and EPDCCH transmit DCI (Downlink Control Information) control information. The DCI may include resource allocation information or resource control information for a terminal and a plurality of terminal groups. For example, the DCI may include uplink scheduling information or downlink scheduling information, an uplink transmission power control command, and the like.

The DCI transmitted through the PDCCH or the EPDCCH has different formats depending on the type and number of information fields, the number of bits of each information field, and the like. DCI formats 0, 3 and 3A are defined for the uplink and formats such as DCI formats 1, 1A, 1B, 1C, 1D, 2, 2A, 2B and 2C can be defined for the downlink. Each DCI format includes a Carrier Indicator Field (CIF), an RB assignment, a modulation coding scheme (MCS), a redundancy version (RV), a new data indicator (NDI), a transmit power control (TPC) Information such as a number, a precoding matrix indicator (PMI) confirmation, a hopping flag, a flag field, and the like are selectively included according to the format. Therefore, the size (size) of the control information conforming to the DCI format may vary. Also, the same DCI format can be used for transmission of two or more types of control information. In this case, the control information is distinguished by the DCI format flag field. Table 1 summarizes the information contained in each DCI format.

(E) PDCCH is transmitted to one or a plurality of consecutive (E) CCE (Enhanced Consecutive Control Channel Element) aggregates. (E) The CCE is composed of a plurality of REGs (Resource Element Groups) as a logical allocation unit. (E) The number of bits transmitted on the PDCCH is determined by the relationship between the number of (E) CCEs and the code rate provided by (E) CCEs.

A cyclic redundancy check (CRC) for error detection is attached to the control information transmitted via the PDCCH according to the DCI format. The CRC is masked with the RNTI (Radio Network Temporary Identifier) according to the (E) PDCCH reception target (terminal, etc.) or usage. More specifically, the CRC scrambled with the RNTI is attached to the control information transmitted via the (E) PDCCH.

The types of RNTIs and corresponding values are shown in Table 2.

Table 3 shows the usage for each RNTI.

The identifier associated with the license-exempt band cell may be defined as: For convenience, the identifier associated with the license-exempted band cell is referred to as a U-RNTI (Unlicensed Cell-RNTI). The U-RNTI may be named differently depending on the license-exempt band cell information. A license-exempt band cell is a cell composed of a license-exempt band.

를 결정할 수 있다.The (E) PDCCH including the CRC scrambled with the U-RNTI may be transmitted to the PDCCH common search space or may be transmitted to the UE-Specific Search Space. The (E) PDCCH location actually transmitted in each search space can be determined by the aggregation level of the CCE and the (E) CCE index calculated through the U-RNTI value. The UE determines a candidate location of CCEs to monitor the PDCCH (E) among the entire search space through Equation (1)

Can be determined.

In Equation (1), N _{CCE, k} is the total number of CCEs in the k subframe, and L may have a value of 1, 2, 4, or 8 as the aggregation level. The CCE aggregation level constituting the (E) PDCCH transmitted in the partial subframe of the license-exempted band cell may have a value of 16 or 32 greater than 8. m 'is a positive integer smaller than the total number of PDCCH candidates M ^(L) -1 to be monitored in a given search space. Y _k may have a value of zero in the common search space. Y _k may be a value determined by the RNTI value. In the case of a license-exempted band cell, Y _k can be a U-RNTI value.

The U-RNTI value may be allocated to a UE-specific or a common value (or a preliminary value) of a base station or a license-exempt band cell, depending on the usage purpose.

When the U-RNTI value is assigned to the UE specific information, information on the U-RNTI value may be transmitted through RRC signaling newly adding / configuring the license-exempt band cell.

The license-exempt band cell can be operated with the licensed band cell and the CA. The configuration, Add, Modify, or Release of the license-exempt band cell is performed through RRC signaling. For example, the configuration, addition, modification, or release of a license-exempt band cell may be performed via an RRConnectionReconfiguration message. This RRC message may be delivered to the terminal from the licensed band cell. The RRC message may include information necessary for operation and operation of the license-exempted band cell.

When a U-RNTI value is designated as a common value of a base station or a license-exempt band cell, the U-RNTI is used to transmit information such as configuration / system of license-exempt band cells configurable in the base station. The U-RNTI value may be pre-specified, such as an SI-RNTI value, or may be delivered via RRC signaling. Also, the U-RNTI has different values for each license-exempt band cell and can be transmitted through RRC signaling. The U-RNTI value may be included in the RRC message in the procedure of newly constructing the license-exempt band cell as the S-cell (secondary cell).

The U-RNTI can be used to convey control information of different license-exempt band cells.

The U-RNTI may be used for dynamic activation or deactivation of the license-exempt band cell. In this regard, the U-RNTI value may be specified differently depending on the usage or (E) the target to receive the PDCCH. That is, a U-RNTI for cell common cell activation / deactivation may be defined or a U-RNTI for cell activation / deactivation specified for each UE may be defined.

7 is a diagram illustrating a method of activating or deactivating a license-exempt band cell according to an embodiment of the present invention.

7, in addition to a primary cell connected through an initial RRC connection / configuration procedure with the base station, the UE transmits an R-C cell through an RRC connection reconfiguration (RRC connection reconfiguration) A secondary cell may be added / released (S710).

The added license-exempt band S cell is initially in the Deactivated state. Thereafter, as the S-cell is switched to the activated state, data transfer can be performed in the license-exempted S-cell.

Switching to the active state for the licensed band S cell may be via active / inactive MAC CE (Control Element) signaling. For example, by setting the S cell index of the MAC CE from 0 to 1, the state of the S cell can be changed to the active state. The transition from the active state to the inactive state is performed by changing the S-cell index of the MAC CE back to 0 or expiration of the timer set by the value of the S-Cell Deactivation Time field of the MAC-MainConfig message as the RRC message. Lt; / RTI > S cell deactivation time can be set to 20, 40, 80, 160, 320, 640, or 1280 ms. If the S-cell deactivation time field is not defined in the MAC-MainConfig message, the UE can assume the value of the corresponding timer as infinity. The S-cell deactivation time field value applies equally to all S-cells. Upon receiving the active MAC CE in the nth subframe, the UE starts the S cell deactivation timer from the (n + 8) th subframe of the cell, and restarts or restarts the S cell. The UE restarts the S-cell deactivation timer whenever it receives the uplink of the activated S-cell or the (E) PDCCH for the downlink resource scheduling (Self-Scheduling or Cross-Carrier Scheduling). When the UE receives the deactivation MAC CE in the nth subframe or the S cell deactivation timer of the UE ends, the UE deactivates the corresponding cell until the (n + 8) th subframe.

The transition of the active / inactive state for the license-exempted band cell may be made to the activated / deactivated MAC CE as in the licensed band S cell. That is, the base station can instruct activation / deactivation of the license-unlicensed band cell by transmitting the activation / deactivation MAC CE to the terminal (S720). Also, when the S cell deactivation time timer applied to all S cells is ended, all S cells can be switched to the inactive state.

However, the UE may not receive the (E) PDCCH up to the value of the S cell deactivation time field defined according to the situation of other radio devices in the same unlicensed band channel that is activated. In this case, the activation procedure is required again when the timer expires. Therefore, the S-cell deactivation time field value for the license-exempted S-cell may be determined by one or more of the methods defined below.

The value of the license-exempt S-cell inactivity time field may be defined as the minimum value of the inactivity-free S-cell inactivity timer, which is not in the license S-cell. The S-Cell Inactivity Time field value may be defined as an integer multiple of the S-Cell Inactivity Time field value defined in the Mac-MainConfig message, or may be defined through new RRC signaling only for S-cells in the license-exempt band, For S cells, it can be defined as infinity.

If a minimum value of the license-deferred S-cell deactivation timer is defined, a fixed minimum value may be defined in advance or a minimum value may be sent to the terminals by RRC signaling. The UE may compare the minimum value of the predefined minimum value or the signaled S-cell deactivation timer with the value of the S-cell deactivation time field of the MAC-MainConfig message to determine a larger value as the start time of the deferral period S-cell deactivation timer.

If the value of the license-deferring S-cell deactivation time field is defined as an integer multiple of the value of the S-deactivation time field defined in the Mac-MainConfig message, the corresponding integer value may be predefined as a fixed value or transmitted to the UEs with RRC signaling have. The terminal may set the start time of the license-exempt band S cell deactivation timer to an integral multiple of the S cell deactivation time field value defined in the Mac-MainConfig message.

If the license-exempt band S cell deactivation time field value is defined through new RRC signaling for the license-exempt band cell, the initial value of the license-exempt band S cell deactivation timer in the license band cell or the license-exempt band cell is transmitted to the terminals via RRC signaling .

If the license-exempt band S cell deactivation time field value is defined as infinite, the terminal may deactivate the license-exempt band S cell according to the deactivated MAC CE sent in the license band cell or the license-exempt band cell.

On the other hand, the activation / deactivation of the license-exempted band cell may use the (E) PDCCH without using the MAC CE differently from the existing license band.

8 is a diagram illustrating an example of a downlink scheduling method of a license-exempt band cell according to an embodiment of the present invention.

Referring to FIG. 8, downlink scheduling of the license-exempted band cell is defined as follows . ≪ / RTI >

The PDSCH resource information of the n-th sub-frame of the license-exempt band cell may be transmitted through the (E) PDCCH of the n-th sub-frame of the same license-exempt band cell. The UE can acquire the PDSCH resource information of the n-th subframe of the license-exempt band cell through the (E) PDCCH of the n-th subframe of the license-exempt band cell (S810).

The UE can receive the PDSCH of the n-th subframe of the license-exempt band cell based on the PDSCH resource information (S820).

Alternatively, PDSCH resource information included in the n-th sub-frame of the license-exempt band cell may be transmitted in the (E) PDCCH of the n-th subframe of the licensed band cell by a cross-carrier scheduling method.

Regarding uplink scheduling, the (E) PDCCH configured in the n-th subframe of the license band cell or the license-exempt band cell may transmit the DCI 0 related to the PUSCH grant of the (n + 4) th uplink subframe. The terminal may operate in one of the following ways if the scheduled (n + 4) th subframe is occupied by a communication node of another WLAN or other license-exempt band cell. Here, the other license-exempt band cell means the license-exempt band cell of another communication carrier.

As a first method, if the (n + 4) -th subframe scheduled in the n-th subframe is occupied by another signal, the UE waits for the reception of the (E) PDCCH including the new DCI 0 .

As a second method, the UE determines the channel state from the (n + 4) th subframe to the (n + 4 + N _{UL_Window} ) th subframe and transmits the uplink when the corresponding channel becomes idle . At this time, for m that is larger than 0 and smaller than N _{UL_Window} , the uplink information of the (n + 4 + m) th subframe may be the same as the information of DCI 0 of the (E) PDCCH transmitted in the nth subframe. The N _{UL_Window} value may be sent to the terminal via RRC signaling, e.g., an RRC connection reconfiguration message or another RRC message or a new license- _exclusion bandwidth management RRC message. N _{UL_Window} value is a positive integer value including 0. For example, if the N _{UL_Window} value is 0 and the (n + 4) th subframe is occupied by the communication node of another WLAN or another LTE license-exempt band cell, the terminal transmits an uplink transmission to the (n + 4) And waits for (E) PDCCH reception including a new DCI 0. That is, the second method may include the first method. The N _{UL_Window} value may be determined or predefined as the maximum integer value that does not exceed the maximum transmission period or the maximum channel occupancy time for the license-exempt band cell in a manner that the RRC signal is not signaled.

9 is a diagram illustrating an example of a license-exempt band transmission burst according to an embodiment of the present invention.

Referring to FIG. 9, unlike the license band cell, the license-exempt band cell is limited in the time that can be continuously transmitted according to the maximum transmission time description criterion condition. If it is necessary to comply with the technical standard for transmission after checking the channel occupancy status, the UE can not transmit data until the transmission of the other communication node is completed. Thus, the transmission of license-exempt band cells has aperiodic, discontinuous, opportunistic characteristics. According to the embodiment of the present invention, the unlicensed band transmission burst is defined as a period in which a base station or a terminal continuously transmits data in a license-exempt band cell according to the characteristics of a license-exempt band cell.

The communication node confirms the occupancy status of the license-exempt band cell and configures the license-exclusion band transmission burst. As mentioned above, the communication node may be a base station or a terminal. The license-exempt band transmission burst consists at least of a set of license-exempt band subframes, and may include a license-exclusion band signal.

The license-exempt band signal may be present at the beginning of the license-exempt band transmission burst. The license-exempt band signal may be configured for one or more of the following purposes: channel occupancy, automatic gain control (AGC), time and frequency synchronization, cell identifier, and length of the license-exempt band transmission burst.

The license-exempt band subframe may be either a general subframe in the license band or a subframe structure defined and used in the license-exempt band.

The general subframe in the license band may consist of one of the subframes DL-1, DL-2, UL-1.

The sub-frame DL-1 indicates a DL sub-frame including a synchronization signal of a Primary Synchronization Signal (PSS) or a Secondary Synchronization Signal (SSS).

The subframe DL-2 indicates a downlink subframe in which the synchronization signal of the PSS or SSS is not included.

The subframe UL-1 represents a physical uplink control channel (PUCCH) and a uplink subframe including a PUSCH.

A cell specific reference signal (CRS) may be included in the DL subframe such as the sub-frames DL-1 and DL-2. CRS is a reference signal transmitted to all UEs in a cell and is used for channel estimation.

The subframe defined and used in the license-exempt band may be one of the subframes PF-1, PE-1, PE-2, DRS-1, DLM-1, SSL-1 and UL-2.

The subframes PF-1, PE-1, and PE-2 represent downlink subframes having a TTI shorter than the TTI of 1 ms. Hereinafter, the downlink subframes PF-1, PE-1, and PE-2 having TTIs shorter than the TTI of 1 ms are referred to as partial subframes.

The subframe PF-1 represents a downlink subframe in which the first N arbitrary symbols of the TTI are not transmitted, and the structure of the transmitted subframe is a DwPTS (downlink) subframe among the special subframes of the frame type 2 pilot time slot structure. The special subframe consists of a downlink interval of DwPTS and an uplink interval of UpPTS (uplink pilot timeslot) at a TTI of 1 ms. In addition, a guard period is included between the DwPTS and the UpPTS in consideration of the round trip delay of the signal.

The partial sub-frame PE-1 represents a DL sub-frame in which the last arbitrary M symbols of the TTI are not transmitted, and the structure of the transmitted sub-frame may be composed of a DwPTS among special sub-frames of the frame type 2. At this time, the DwPTS structure composed of 3 symbols among the DwPTS structure can be excluded.

The partial sub-frame PE-2 represents a DL sub-frame in which no signal is transmitted during a predetermined time from the last symbol of the TTI. A fixed time without a signal can be one of 16us, 25us, or 34us. The backoff time signaled by the base station may be included at a certain time without a signal. Also, the last symbol may be composed of a postfix of the preceding symbol.

The sub-frame DRS-1 represents a downlink sub-frame in which a DRS (Discovery Reference Signal) and a PDSCH are multiplexed. Here, unlike the DRS of the Release 12, the DRS can be a DRS composed of a CRS and a PSS / SSS with a new pattern suitable for a license-exempted band cell environment. A terminal connected to a cell can know the time or period (DRS measurement timing configuration) of the DRS transmitted. Therefore, the UE can process the downlink subframe including the license-exempt DRS by rate matching with the rate matching of the general subframe of the existing license band.

The sub-frame DLM-1 represents a DL sub-frame having the same structure as a MBSFN (Multicast Broadcast Single Frequency Network) sub-frame and including CRS in the first or two symbols of the TTI and no CRS in the remaining symbols. The PDSCH in the interval not including the CRS may be configured as a transmission mode using the DMRS. This is to minimize the overhead associated with CRS configuration.

At this time, the CRS may be included in the DL subframe such as the subframes PF-1, PE-1, PE-2, DRS-1, and DLM-1.

The subframe SSL-1 represents a subframe in which a downlink symbol and an uplink symbol are simultaneously configured. The interval between the downlink and uplink may be a fixed time. For example, the fixed time can be set to one of 16us, 25us, or 34us. The interval between the downlink and the uplink may include a backoff time for signaling by the base station.

The uplink signal may be composed of at least one of SRS (Sounding Reference Signal) and PRACH (Physical Random Access Channel).

The subframe UL-2 represents an uplink subframe consisting only of a PUCCH. If the subframe is composed of only the PUCCH, it can be transmitted after a fixed time interval without channel occupancy confirmation (LBT) after downlink since the control signal is stronger than data transmission. For example, the fixed time can be set to one of 16us, 25us, or 34us.

10 and 11 are diagrams showing an example of a license-exempt band transmission burst composed only of downlink sub-frames according to an embodiment of the present invention.

Referring to FIGS. 10 and 11, the license-exempt band transmission bursts 1010, 1020, 1110, and 1120 may include only downlink subframes.

Referring to FIG. 10, the license-exempt band transmission bursts 1010 and 1020 may be composed of a combination of sub-frames DL-1 and DL-2.

One frame is composed of 10 subframes, and 10 subframes have a subframe index sequentially from 0 to 9. In this case, the license-exempt band transmission burst 1010 may be composed of three subframes of subframe indices 0, 1 and 2, and the license-exclusion band transmission burst 1020 may be composed of four subframes of subframe indices 4, 5, Frame. The subframe DL-1 in the license-exclusion band transmission bursts 1010 and 1020 may be configured in the subframe index 0 and the subframe index 5. In this case, the license-exempt band signal may not be included in the license-exempt band transmission burst 1010, such as the license-exclusion band transmission burst 1010, or may be included in the license-exclusion band transmission burst 1020,

Referring to FIG. 11, the license-exempt band transmission burst 1110 may be composed of a combination of sub-frames DL-1, DL-2, and PF-1. The subframe index 0 may be composed of a subframe DL-1. And the subframe PE-1 may be configured at the last subframe position of the license-exempt band transmission burst 1110. [

In addition, the license-exempt band transmission burst 1120 may be composed of a combination of subframes DL-2, PF-1, and PE-2. In other words, the license-exempt band transmission burst 1120 may not include the PSS / SSS. The subframe PF-1 may be configured in the first subframe position of the license-exempt band transmission burst 1120 and the subframe PE-1 may be configured in the last subframe position of the license-exclusion bandwidth transmission burst 1120 .

The license-exempt band signal may not be transmitted as the license-exempt band transmission burst 1110 and may be transmitted in some of the first arbitrary N symbols of the subframe PF-1, such as the license-exclusion band transmission burst 1120.

As such, the PSS / SSS may be included in the subframe indexes 0 and 5 in one frame. Where the number of symbols in the PSS / SSS or the number of ports in the CRS may be configured to be greater than or equal to the number of symbols in the PSS / SSS or CRS in Release 12 DRS. For example, the number of CRS ports in subframe indexes 0 and 5 may be equal to or greater than the number of CRS ports in the license-exclusion zone DRS.

12 is a diagram illustrating an example of a license-exempt band transmission burst including a subframe in which a license-exempt band DRS and a PDSCH are multiplexed according to an embodiment of the present invention.

Referring to FIG. 12, the license-exempt band transmission bursts 1210 and 1220 may be composed of a combination of sub-frames DRS-1, DL-2, and PF-1.

The subframe DRS-1 may be configured with the subframe index 0 of the license-exempted bandwidth transmission burst 1210 in the subframe index 0 of one frame, and the subframe DRS- , The sub-frame DL-2 may be configured. In addition, the sub-frame indexes DL-2 may be composed of the sub-frame indexes 1 and 2.

The license-exempt band transmission burst 1220 may be composed of three subframes with subframe indices 5, 6, The subframe DRS-1 may be configured in the subframe index 6 according to the LBT operation, in which the subframe DRS-1 is transmitted in the subframe index 5 according to the DMTC cycle. The subframe PF-1 may be configured in the subframe index 5, and the subframe DL-2 may be configured in the subframe index 7.

The license-exempt band signal may be transmitted in the first arbitrary N symbols of the subframe PF-1 of the license-exempt band transmission burst 1220.

In this manner, when the license-exempt band DRS and the PDSCH are multiplexed, since the license-exempt band DRS is composed of the PSS / SSS / CRS subset of the release 12, the rate matching of the PDSCH may be different depending on the subset configuration method. The terminal can predict whether the DRS and PDSCH are multiplexed in the license-exempt zone through the DMTC information. Alternatively, the UE can confirm whether the DRS DRS and the PDSCH are multiplexed through signaling.

13 is a diagram illustrating a structure including a CRS-included symbol and a subframe including a CRS-free symbol according to another example of the license-exempt band transmission burst according to the embodiment of the present invention.

Referring to FIG. 13, the license-exempt band transmission bursts 1310 and 1320 may be composed of a combination of sub-frames DL-1 and DLM-1. The license-exempt band transmission burst 1310 may be composed of three subframes of subframe indices 0, 1 and 2, and the license-exclusion band transmission burst 1320 may be composed of four subframes of subframe indices 4, 5, 6, . The subframe DL-1 in the license-exempt band transmission bursts 1310 and 1320 may be configured in the subframe index 0 and the subframe index 5. The subframe DLM-1 may be configured with subframe indices 0 and 1 in the license-exempt band transmission burst 1310 and the subframe DLM-1 may be configured with subframe indices 4, 6 and 7 in the license- 1) can be configured. The CRS may be included in the first one or two symbol periods of the sub-frame DLM-1.

And the license-exempt band signal may not be included in the license-exempt band transmission burst 1310, such as a license-exempt band transmission burst 1310, and may be located at the beginning of the license-exclusion band transmission burst 1320, .

14 and 15 are diagrams illustrating an example of an unlicensed band transmission burst composed of a DL subframe and an UL subframe according to an embodiment of the present invention.

14, the license-exempt band transmission burst 1410 may be configured of a combination of the downlink sub-frames DL-1, DL-2, and PE-2 and the uplink sub-frame UL-1. Also, the license-exempt band transmission burst 1420 may be configured by a combination of the downlink sub-frames DL-2, DRS-1, and PE-2 and the uplink sub-frame UL-2.

The subframe DL-1 may be configured to the subframe index 0, the subframe PE-2 may be configured to the subframe index 1, and the subframe UL- 1) may be configured after the subframe PE-2. An interval during which a signal is not transmitted for a predetermined time out of the last symbols of the subframe PE-2 can be used as the switching time between the downlink and the uplink. The sub-frame DL-2 may be configured immediately before the sub-frame DL-1.

The subframe DRS-1 may be configured in the subframe index 5, the subframe PE-2 may be configured in the subframe index 6, and the subframe UL- 2 may be configured after the subframe PE-2. In the subframe DL-2, the subframe DL-2 may be configured in the subframe index 4 immediately before the subframe DL-1.

15, the license-exempt band transmission burst 1510 is different from the license-exclusion band transmission burst 1410 shown in FIG. 14 in that a special sub-frame (UL-1) is inserted between the sub- SS-1) can be configured. The license-exempt band transmission burst 1520 can also be configured between the DRS-1 sub-frame UL-2 and the special sub-frame SS-1, unlike the license-exclusion band transmission burst 1410 shown in FIG. have.

On the other hand, in the downlink subframe structure, the LTE system has the same subframe index of the P cell and the S cell. Therefore, in the CA configuration of the P cell and the S cell of the frame type 1, the S cell also transmits the PSS and the SSS at the time of the subframe index 0 and 5 of the P cell. This is because the S-cell can be configured to a specific terminal and the P-cell can be configured to another terminal. The UE confirms the cell ID using the PSS and the SSS of the P-cell, and performs synchronization. However, a license-exempt band cell does not consist of a P-cell. Therefore, PSS and SSS may not be transmitted to subframe indexes 0 and 5 of frame type 1. Also, PBCH (Physical Broadcasting Channel) may not be included in the license-exempt band transmission burst. If the license-exempted transmission burst consists of four subframes with subframe indices 1, 2, 3 and 4, then the PSS and SSS may not be included. Therefore, it is necessary to use a method other than PSS / SSS for cell ID identification and synchronization in a license-exempt band cell. For example, the cell ID can be verified by using the license band signal or using the CRS.

16 is a diagram illustrating an example of a license-exempt band transmission burst in which the PSS / SSS is not included according to the embodiment of the present invention.

16, the license-exempt band transmission burst 1610 may be composed of a combination of the sub-frames DL-2, PF-1 and PE-1, 2, PF-1, PE-2). That is, the PSS / SSS may not be transmitted at the subframe indexes 0 and 5.

In the license-exclusion band transmission burst 1610, a subframe DL-2 may be configured with a subframe index 0, and a subframe PE-1 may be configured with a last subframe position. The subframe PF-1 may be configured at a position before the subframe index 0.

In the license-exclusion band transmission burst 1620, a subframe DL-2 may be configured in subframe index 5, a subframe PF-1 may be configured before subframe DL-2, The subframe PE-2 may be configured at the subframe position.

The license-exempt band signal may be transmitted in the first arbitrary N symbol intervals of the subframe PF-1, or may not be transmitted.

On the other hand, if the PSS / SSS is always required for the license-exempt band transmission burst, the PSS / SSS / CRS can be transmitted in the subframe of the subframe indexes 0 and 5. In the case of a license-exempt band cell, the subframe DL-1 including the PSS / SSS may be transmitted in addition to the subframe indexes 0 and 5. More specifically, in the case of a license-exempt band cell, subframe DL-1 may be transmitted in addition to subframe indices 0 and 5 of the subframes of the license-exempt band transmission burst. For example, if the license-exempt band transmission burst consists of only four subframes with subframe indexes 1, 2, 3, and 4, the subframe DL-1 including the PSS / Must be included in at least one subframe. The subframe DL-1 may be located in the first subframe of the license-exclusion band transmission burst. In this case, the terminal awakened from discontinuous reception (DRX) may not recognize whether the corresponding subframe is a subframe (DL-1) or a subframe (DL-2). Therefore, there is a need to signal the type of each subframe to the terminal.

17 shows another example of a license-exempt band transmission burst according to an embodiment of the present invention, in which a subframe including a PSS / SSS is transmitted in a subframe index different from subframe indexes 0 and 5 .

Referring to FIG. 17, a subframe DL-1 may be configured with a subframe index 1 of a license-exempt band transmission burst 1710. In addition, the subframe DL-1 may be configured in the subframe index 6 of the license-exempted band transmission burst 1720. Alternatively, the subframe DL-1 including the PSS / SSS in any subframe index among the subframe indices 1, 2, 3, 4, 6, 7, 8 and 9 may be configured.

Next, a description will be made of a method for identifying various subframe types that can constitute a license-exempted band transmission burst, and a method for determining whether each subframe is a subframe transmitted from a serving cell desired by the terminal. The subframes constituting the above-described license-exclusion band transmission burst can be identified by the terminal without signaling. However, it is necessary for the UE awakened from the DRX to check whether each subframe is a subframe transmitted from a serving cell. Also, when the unlicensed band transmission burst is composed of partial subframes, it may be required to confirm the method and to signal the symbol length of the corresponding subframe.

Signaling, which may be included in every subframe or in each license-exempt band transmission burst, may be used for the following purposes.

The number of symbols including the CRS included in the subframe can be signaled. For example, 1, 2, 4, or 6 symbols can be signaled to the terminal. One or two, four or six symbols can be signaled to the terminal.

Information about the last sub-frame may be signaled. And may be signaled to the terminal whether the corresponding subframe is the last subframe. The corresponding subframe may be signaled to the UE as a last subframe or a general subframe or a partial subframe having a TTI of 1 ms. It can be signaled to the terminal that the corresponding subframe is composed of several symbols in the partial subframe structure as the last subframe.

Information on the number of subframes of the license-exempt band transmission burst can be signaled. The signaling for the number of subframes of the license-exempt band transmission burst can be signaled to the terminal of the number of remaining subframes of the currently transmitted burst. The signaling for the number of subframes of the license-exempt band transmission burst can be signaled to the terminal of the number of remaining subframes including the current subframe of the currently transmitted burst. Signaling for the number of subframes of the license-exempt band transmission burst can be signaled to the terminal by the number of subframes of the next license-exempt band transmission burst to be transmitted after the current transmission burst.

The number of subframes for which the UE does not need to (E) monitor the PDCCH after the current unlicensed bandwidth transmission burst is terminated can be signaled to the UE.

Whether the currently transmitted subframe includes at least one of a CSI-Channel State Information-Reference Signal (CSI-RS) and a CSI-IM (Channel State Information-Interference Measurement) may be signaled to the UE.

The transmit power for one or more of the CRS or CSI-RS of the license-exempt band transmission burst may be signaled to the terminal.

The signaling used for this purpose may be a method using PHICH, a method using U-RNTI, or a method using DCI information. Here, it is possible to use the structure of the PHICH defined for the conventional uplink HARQ feedback for the purpose of license-exempted band signaling. The method using the U-RNTI can be applied to scramble the CRC of the PDCCH transmitted to the cell common search space or the (E) PDCCH transmitted to the UE specific search space. The method using the U-RNTI may be a PDCCH transmitted in the cell common search area or a signaling included in the DCI of the (E) PDCCH transmitted in the UE-specific search area.

Such signaling may be generated by the base station and transmitted to the terminal.

The unlicensed band signaling method using the PHICH will be described.

In the license-exempted band cell, since the channel can occupy opportunistically, it is impossible to transmit HARQ response information at a fixed time point corresponding to the uplink subframe index. Therefore, in the license-exempt band cell, the response information for the uplink can be transmitted asynchronously differently from the license band cell. In the uplink HARQ of the unlicensed band cell, not the PHICH of the downlink PDCCH but the redundancy version and the HARQ process information may be included in the DCI control information transmitted on the (E) PDCCH. In this case, PHICH can be used for other information delivery. In the embodiment of the present invention, a method for acquiring information on various types of subframe structure using a PHICH is presented. And acquiring the cell ID of each subframe by detecting at least one of the specified sequences of PHICHs.

)과 PHICH 그룹(

) 내의 직교시퀀스 (Orthogonal Sequence) 인덱스(

)로 정의될 수 있다. PHICH 그룹(

)의 수는 CP에 따라 다르게 수학식 2와 같이 정의되거나 비면허대역 셀에서는 PHICH 그룹(

)의 수가 상위 레이어에서 지정되어 RRC(Radio Resource Control) 시그널링을 통해 전송될 수 있다. The PHICH resource is the PHICH group (

) And the PHICH group (

) Orthogonal Sequence Index (

). ≪ / RTI > PHICH Group (

) Is defined as shown in Equation 2 differently depending on the CP, or in the license-exempt band cell, the number of PHICH groups (

May be specified in the upper layer and transmitted through Radio Resource Control (RRC) signaling.

가 가능하며,

는 상위 레이어에서 정의될 수 있다.

는

의 값으로 비면허대역 셀에서는 1 또는 2의 값으로 정의될 수 있다.here,

And,

Can be defined in the upper layer.

The

And in a license-exempt band cell, a value of 1 or 2 can be defined.

가 표 4와 같이 정의될 수 있다.The PHICH sequence may have a value from 0 to 7, and the Orthogonal Sequence used for each PHICH sequence according to the CP,

Can be defined as shown in Table 4.

가 되고 다시 BPSK로 변조되어 Z(0),Z(1),…,Z(M_s-1)의 복소 심볼이 된다. 이때, M_bit=M_S이다. 각 복소 심볼은 수학식 3에 따라 새로운 심볼열 d(0),….,d(M_symb-1)이 된다. The information 0 or 1 transmitted to the PHICH depends on the channel coding

(0), Z (1), ..., and so on. , And Z (M _s -1), respectively. At this time, M _bit = M _S. Each complex symbol has a new symbol sequence d (0), ..., ., d (M _symb -1).

가 된다. c(i)는 셀 지정 스크램블 시퀀스(Cell Specific Scrambling Sequence)로써 생성 초기값은 수학식 4에 의해 결정된다.Here, i = 0, ... , M _symb -1,

. c (i) is a cell specific scrambling sequence, and the generation initial value is determined by equation (4).

가 필요하다. 다시 말해 셀 ID가 다른 경우 정의된 PHICH 정보(HI) 비트 정보를 획득하지 못하게 된다.Therefore, in order to accurately check the symbol transmitted to the PHICH,

. In other words, when the cell ID is different, it is impossible to acquire the defined PHICH information (HI) bit information.

가 셀마다 다르게 정의될 수 있다. More than one PHICH sequence may be defined for the serving cell information acquisition in one or more PHICH groups to ensure that each subframe is transmitted from a serving cell. For example, when a general CP is used in a 20 MHz bandwidth and three PHICH groups are formed according to information defined from an upper layer, HI bit 0 of PHICH sequence 0 of PHICH group 1 and HI 1 of PHCICH sequence 1 correspond to a cell Of the information. The UE can acquire the cell information by checking whether the value of the corresponding PHICH sequence of the corresponding PHICH group is equal to the corresponding HI bit. Here,

May be defined differently for each cell.

비트)의 하나 이상의 조합으로 구성될 수 있다. 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링될 수 있다. 예를 들면, 조합 정보는 RRC 연결 재구성(RRCconnectionReconfiguration) 메시지에 포함되거나 비면허대역 셀에 대한 시스템 정보 블록(system information block, SIB) 에 정의되어 전송될 수 있다. That is, the cell acquisition information includes (one or more PHICH groups, one or more sets of PHICH sequences, HI bits,

Bit). ≪ / RTI > The combination information may be signaled to the terminal in connection with the license-exempt band cell configuration information. For example, the combination information may be included in an RRC connection reconfiguration message or may be defined and transmitted in a system information block (SIB) for a license-exempt band cell.

비트)의 하나 이상의 조합으로 구성될 수 있다. 예를 들면, PHICH 그룹 1의 PHICH 시퀀스 2의 값의 1이면 해당 서브프레임이 서브프레임(DLM-1)인 것으로 정의할 수 있다. 또한 모든 가능한 조합에 대한 정보 비트 개수가 x개라고 할 때, x개의 PHICH 시퀀스로써 각 서브프레임의 타입을 지정할 수 있다. The type information of each subframe may also be stored in a similar manner (one or more PHICH groups, one or more PHICH sequences, HI bits,

Bit). ≪ / RTI > For example, if the value of the PHICH sequence 2 in the PHICH group 1 is 1, it can be defined that the corresponding subframe is the subframe DLM-1. Also, if the number of information bits for all possible combinations is x, then the type of each subframe can be specified with x PHICH sequences.

비트)의 하나 이상의 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링될 수 있다. (At least one PHICH group, at least one set of PHICH sequences, HI bits,

Bit) may be signaled to the terminal in connection with the unlicensed band cell configuration information.

비트)의 하나 이상의 조합으로 구성될 수 있다. 예를 들면, PHICH 그룹 2의 PHICH 시퀀스 0,1,2,3의 4가지 시퀀스에 대한 HI 비트로 부분 서브프레임을 구성하는 심볼의 수가 정의될 수 있다.In addition, the length information of the corresponding sub-frame in the partial sub-frame is also stored in a similar manner (at least one PHICH group, at least one PHICH sequence, HI bit,

Bit). ≪ / RTI > For example, the number of symbols constituting the partial subframe can be defined by the HI bits for the four sequences of the PHICH sequence 0, 1, 2, and 3 in the PHICH group 2.

비트)의 하나 이상의 조합으로 구성될 수 있다. 이 조합 정보 또한 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링될 수 있다. The number information of symbols constituting the subframe (at least one PHICH group, at least one set of PHICH sequences, HI information bits of PHICH,

Bit). ≪ / RTI > This combination information can also be signaled to the terminal in connection with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합으로 구성될 수 있다. 이 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링 될 수 있다. In addition, subframe length information of a license-exempt band transmission burst can be defined as PHICH information of each subframe. For example, by defining the PHICH specific information value of the first subframe of the license-exempt band transmission burst composed of four consecutive subframes as 4 and the PHICH specific information value of the second subframe as 3, Frame length information can be transmitted. In addition, the subframe length of the remaining bursts from the information bits scrambled with the PHICH sequence 0, 1, 2, and 3 in the PHICH group 3 can be defined. That is, the subframe length information of the license-exempt band transmission burst includes at least one PHICH group, at least one set of PHICH sequences, HI bits,

Bit). ≪ / RTI > This combination information can be signaled to the terminal in association with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합들에 의해 각 서브프레임에 함께 전송될 수 있다. 따라서, 이와 같이 전송되는 경우 단말은 각 서브프레임이 서빙 셀에서 전송된 것인지 확인할 수 있고, 해당 서브프레임의 타입을 확인할 수 있으며, 부분 서브프레임의 경우 몇 개의 심볼로 구성되고 현재 비면허대역 전송 버스트의 남은 서브프레임 수를 인지할 수 있게 된다. As such, one or more pieces of information that can be defined as PHICHs (one or more PHICH groups, one or more PHICH sequence sets, HI bits,

Bit) by one or more combinations of < / RTI > Therefore, when the transmission is performed in this manner, the UE can confirm whether each subframe is transmitted in the serving cell and can confirm the type of the corresponding subframe. In case of the partial subframe, The number of remaining subframes can be recognized.

비트)의 하나 이상의 조합으로 구성될 수 있다. 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링될 수 있다. 일 예로, PHICH 그룹 1의 PHICH 시퀀스 1의 값이 1이면 해당 서브프레임의 CRS 심볼이 1개의 심볼로 구성된 것으로 정의될 수 있다. 또한 PHICH 그룹 1의 PHICH 시퀀스 0, 1, 2, 3의 4가지 시퀀스에 대한 HI 비트로 CRS 심볼의 수 1, 2, 4, 6를 각각 정의할 수 있다. 또 다른 일 예로, 모든 가능한 조합에 대한 정보 비트 개수가 x개라고 할 때, x개의 PHICH 시퀀스로써 CRS 심볼의 수를 지정할 수 있다. 이때 CRS 심볼의 수로부터 서브프레임의 타입이 지정될 수도 있다. In addition, the number of symbols (hereinafter referred to as CRS symbols) constituting the CRS of each subframe may be determined in a similar manner (at least one PHICH group, at least one set of PHICH sequences,

Bit). ≪ / RTI > The combination information may be signaled to the terminal in connection with the license-exempt band cell configuration information. For example, if the PHICH sequence 1 value of the PHICH group 1 is 1, the CRS symbol of the corresponding subframe may be defined as one symbol. In addition, the number of CRS symbols 1, 2, 4, and 6 can be defined by HI bits for four sequences of PHICH sequence 0, 1, 2, and 3 of PHICH group 1, respectively. As another example, if the number of information bits for all possible combinations is x, then the number of CRS symbols can be specified as x PHICH sequences. At this time, the type of the subframe may be designated from the number of CRS symbols.

비트)의 하나 이상의 조합으로 구성될 수 있다. 예를 들면, PHICH 그룹 1의 PHICH 시퀀스 0에 대한 HI 비트로 마지막 서브프레임인지 여부를 시그널링할 수 있다. 또는 PHICH 그룹 1의 PHICH 시퀀스 0과 1에 대한 HI 비트로 마지막 서브프레임인지 여부와 함께 1ms의 TTI로 구성된 서브프레임인지 부분 서브프레임인지 시그널링될 수 있다. 또는 PHICH 그룹 2의 PHICH 시퀀스에 대한 HI 비트 일부를 이용하여 마지막 서브프레임을 구성하는 심볼 수가 시그널링 될 수 있다. 즉, 마지막 서브프레임 여부 또는 서브프레임 구조 또는 부분 서브프레임일 경우 심볼의 수 정보는 (PHICH 그룹 하나 이상, PHICH 시퀀스 하나 이상의 집합, HI 비트,

비트)의 하나 이상의 조합으로 구성될 수 있다. 이 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링 될 수 있다. Whether or not the current subframe is the last subframe, whether it is the last normal subframe or the partial subframe, or the number of symbols constituting the last subframe may be determined in a similar manner (one or more PHICH groups, one or more PHICH sequences,

Bit). ≪ / RTI > For example, it may signal whether it is the last subframe with HI bits for PHICH sequence 0 of PHICH group 1. Or a 1-ms TTI with the HI bits for the PHICH sequence 0 and 1 in the PHICH group 1, as well as whether it is the last subframe or the partial subframe. Or a portion of the HI bits for the PHICH sequence of PHICH group 2 may be used to signal the number of symbols constituting the last subframe. That is, in the case of the last subframe, the subframe structure, or the partial subframe, information on the number of symbols includes (at least one PHICH group, at least one set of PHICH sequences, HI bits,

Bit). ≪ / RTI > This combination information can be signaled to the terminal in association with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합으로 구성될 수 있다. 이 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링 될 수 있다. The subframe length information of the license-exempted band transmission burst to be transmitted next may be defined as the PHICH information of each subframe. If the next license-exempted band transmission burst to be transmitted consists of ten consecutive subframes, at least the current license- By setting the PHICH specific information value of one or more subframes to 10, the subframe length information of the next license-exempt band transmission burst can be signaled. For example, the subframe length of the next burst can be specified from the information bits scrambled with the PHICH sequence 0, 1, 2, 3 of PHICH group 3. That is, the subframe length information of the license-exempted band transmission burst to be transmitted next (at least one PHICH group, at least one set of PHICH sequences, HI bits,

Bit). ≪ / RTI > This combination information can be signaled to the terminal in association with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합으로 구성될 수 있다. 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링 될 수 있다. The subframe length information in which the UE does not need to monitor the (E) PDCCH after the current unlicensed band transmission burst can be defined as the PHICH information of each subframe. If the monitoring of the terminal is not required for the next 15 consecutive subframes since receipt of the current license-exempt band transmission burst, the PHICH specific information value in the last subframe of at least the current license-exclusion bandwidth transmission burst can be signaled as 15. For example, from the information bits scrambled into the PHICH sequence 0, 1, 2, 3 (or up to 8 sequences) of PHICH group 3, a subframe length not required for monitoring can be specified. That is, the subframe length information in which (E) PDCCH monitoring is not requested to the UE until the next license-exempted bandwidth transmission burst (one or more PHICH groups, one or more sets of PHICH sequences,

Bit). ≪ / RTI > The combination information may be signaled to the terminal in connection with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합으로 구성될 수 있다. 이 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링 될 수 있다. For example, whether or not one or more of CSI-RS or CSI-IM is configured in the current subframe can be defined as the CSI-RS or CSI-RS from the information bits scrambled with the PHICH sequence 5 of PHICH group 1. For example, It can be specified whether one or more of the IMs are configured. That is, the antenna port and CSI process information including whether CSI-RS or CSI-IM is configured (at least one PHICH group, at least one set of PHICH sequences, HI bits of PHICH,

Bit). ≪ / RTI > This combination information can be signaled to the terminal in association with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합으로 구성될 수 있다. 조합 정보는 비면허대역 셀 구성 정보와 관련하여 단말에게 시그널링 될 수 있다. The transmit power information of the CRS or CSI currently configured in the unlicensed band transmission burst can be signaled to the PHICH. For example, the information bits scrambled with the PHICH sequence 0, 1, 2, 3 (or up to 8 sequences) The transmission power information of the CRS or the CSI can be designated. That is, the transmission power information of the CRS or CSI includes (at least one PHICH group, at least one set of PHICH sequences, HI bits of PHICH,

Bit). ≪ / RTI > The combination information may be signaled to the terminal in connection with the license-exempt band cell configuration information.

비트)의 하나 이상의 조합들에 의해 각 서브프레임에 함께 전송될 수 있다. 따라서, 이와 같이 전송되는 경우 단말은 각 서브프레임이 서빙 셀에서 전송된 것인지 확인할 수 있고, 해당 서브프레임의 타입을 확인할 수 있으며, 부분 서브프레임의 경우 몇 개의 심볼로 구성되고 현재 버스트의 남은 서브프레임 수, 다음 버스트의 서브프레임 수, CSI-RS/CSI-IM이 구성되었는지 여부, CRS/CSI-RS의 전송 전력 정보, 단말이 (E)PDCCH를 모니터링하지 않아도 되는 서브프레임의 수 등의 정보 중 하나 이상을 인지할 수 있게 된다. Thus, one or more pieces of information that can be defined as PHICHs (at least one PHICH group, at least one set of PHICH sequences, HI bits of PHICH,

Bit) by one or more combinations of < / RTI > Accordingly, when the data is transmitted in this manner, the UE can confirm whether each subframe is transmitted in the serving cell and can confirm the type of the corresponding subframe. In case of the partial subframe, The number of subframes of the next burst, whether or not the CSI-RS / CSI-IM is configured, the transmission power information of the CRS / CSI-RS, and the number of subframes in which the UE does not need to monitor the PDCCH. One or more can be recognized.

Next, a signaling method using U-RNTI will be described.

The PDCCH including the DCI for transmitting the system information of the corresponding cell in the license-exempt band cell or the CRC of the (E) PDCCH may be masked with the U-RNTI for a specific purpose. In this case, the (E) PDCCH can be transmitted to the UE-designated search area resource which uses the resources of the cell common search area or is designated according to the U-RNTI value. The UE can confirm the resources transmitted from the serving cell by demodulating the DCI with the U-RNTI defined according to a specific purpose. In addition, subframe type information can be transmitted to the corresponding DCI. In this case, the DCI does not include PDSCH-related information but may include only subframe information or license-exiting band transmission burst information. Here, the subframe information may include information such as a subframe type, the number of subframes having a TTI shorter than a 1 ms TTI, and the number of CRS symbols transmitted to a symbol after the PDCCH. The unlicensed band transmission burst information may include information on the number of remaining subframes of the burst, the number of subframes of the next burst, uplink configuration information, CSR / RS-CSI-IM configuration information, CRS / CSI-RS power information, and the like.

Finally, a signaling method using DCI information will be described.

The signaling method using the DCI information is a method of using the DCI which designates the SIB in the cell common search area of the license-exempt band PDCCH or the license-exempt band SIB designated by the corresponding DCI. The UE can confirm that the corresponding subframe is transmitted from the serving cell by demodulating the DCI. In addition, the UE may use the information included in the DCI or obtain information on the subframe and the license-exempted transmission burst from the SIB associated with the license-exempted band transmitted on the PDSCH designated by the corresponding DCI. The subframe information may include information such as a subframe type, the number of symbols of the partial subframe, the number of CRS symbols transmitted to symbols after the PDCCH, and the like. The unlicensed bandwidth transmission burst information may include information on the number of remaining subframes of the burst, the number of subframes of the next burst, uplink configuration information, whether CSR / RS-CSI-IM is configured, CRS / CSI-RS transmission power information, .

18 is a diagram illustrating an apparatus for constructing a license-exempt band according to an embodiment of the present invention.

18, the license-exempt band frame configuration apparatus 1800 includes a processor 1810, a transceiver 1820, and a memory 1830. The license-exempt band frame composition apparatus 1800 may be implemented in a base station or a terminal.

The processor 1810 constructs a license-exempt band transmission burst for continuously transmitting a plurality of subframes by checking the channel occupancy state of the license-exempt band, and generates signaling information for informing information of subframes of the license-exclusion band transmission burst. The processor 1810 may configure the license-exempted band transmission burst using subframes defined in a general subframe in the license band or a license-exempt band as described based on Figs. 9 to 17.

Transceiver 1820 is coupled to processor 1810 to transmit and receive radio signals.

The memory 1830 stores instructions for execution in the processor 1810 or temporarily loads and stores instructions from a storage device (not shown), and the processor 1810 stores the instructions stored in the memory 1830 . The memory 1830 may also store information related to the operation of the processor 1810.

The processor 1810 and the memory 1830 are connected to each other via a bus (not shown), and an input / output interface (not shown) may also be connected to the bus. At this time, a transceiver 1820 is connected to the input / output interface, and peripheral devices such as an input device, a display, a speaker, and a storage device may be connected. The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, Such an embodiment can be readily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

Claims [1] A method for constructing a license-exempt band frame at a communication node,
Constructing a license-exempt band transmission burst considering the channel occupancy state of the license-exempted band, and
Transmitting the license-exclusion band transmission burst through a license-exempt band
Lt; / RTI >
Wherein the license-exempt band transmission burst includes a plurality of consecutive sub-frames,
Wherein at least one subframe of the plurality of subframes is a subframe of a different type from the rest of the subframes. The method of claim 1,
Adding a license-exempt band signal to a start position of the license-exclusion band transmission burst;
Further comprising the steps of: The method of claim 1,
Wherein the at least one subframe includes a partial subframe having a shorter duration than the remaining subframes. 4. The method of claim 3,
The remaining sub-frames including a plurality of symbols in a time domain,
Wherein the partial subframe does not transmit a signal for the first or last partial time among the time lengths of the remaining subframes. The method of claim 1,
Wherein the at least one subframe is an uplink subframe and the remaining subframe is a downlink subframe. The method of claim 1,
Wherein the at least one subframe includes a subframe in which a symbol in which a cell-specific reference signal (CRS) exists and a non-existent symbol are mixed. The method of claim 1,
Wherein the at least one subframe includes a subframe in which a DRS (Discovery Reference Signal) is multiplexed with a PDSCH (Physical Downlink Shared Channel). The method of claim 1,
Wherein the at least one subframe comprises an uplink subframe consisting only of a Physical Uplink Control Channel (PUCCH). The method of claim 1,
Wherein the at least one subframe includes a sub-frame including a Primary Synchronization Signal (PSS) / a Secondary Synchronization Signal (SSS). The method of claim 1,
Signaling information of subframes constituting the license-exempt band transmission burst
Further comprising the steps of: 11. The method of claim 10,
The information includes at least one of a number of symbols including a CRS included in a subframe, information on a last subframe of the license-exempt band transmission burst, a number of symbols constituting the partial subframe, a number of subframes of the license- The number of subframes remaining in the currently-transmitted license-exempt band transmission burst, the number of subframes of the next license-exiting band transmission burst, the number of subframes of the CSI-RS (CSI-CSI-RS), a channel state information-reference signal (CSI), and a transmission power of a CRS / CSI-RS. 11. The method of claim 10,
The signaling may include a physical HARQ indicator channel (PHICH) defined for uplink HARQ (Hybrid Automatic Repeat reQuest) feedback, a Unlicensed Cell-Radio Network Temporary Identifier (U-RNTI) associated with a license- And transmitting the information using at least one of the first information and the second information. The method of claim 12,
Wherein the signaling comprises transmitting the information in a combination of one or more of a PHICH group, a PHICH sequence and a PHICH information bit. An apparatus for constructing a license-exempt band of a communication node,
Claims [1] A processor for generating signaling information for informing information of subframes of an unlicensed band transmission burst, comprising: a processor for configuring a license-exclusion bandwidth transmission burst for continuously checking a channel occupation state of a license-
A transmission / reception device connected to the network for transmitting the license-exempt band transmission burst and signaling information,
/ RTI >
Wherein at least one sub-frame of the plurality of sub-frames is a sub-frame different from the remaining sub-frames. The method of claim 14,
Wherein the at least one subframe includes a downlink subframe including a synchronization signal and the remaining subframe includes a downlink subframe including no synchronization signal. The method of claim 14,
The at least one subframe includes a DL subframe in which a DRS (Discovery Reference Signal) is multiplexed with a PDSCH (Physical Downlink Shared Channel), and the remaining subframe includes a DL subframe Gt; a < / RTI > In Item 14,
Wherein the at least one subframe is an uplink subframe and the remaining subframe is a downlink subframe. The method of claim 14,
Wherein the at least one subframe includes a partial subframe having a shorter duration than the remaining subframes. The method of claim 14,
The signaling information includes a number of symbols including a cell-specific reference signal (CRS) included in a subframe, information on a last subframe of the license-exempt band transmission burst, a number of symbols constituting the partial subframe, The number of subframes of the burst, the number of subframes that do not need to monitor the control channel region since the currently transmitted license-exclusion band transmission burst is terminated, the number of remaining subframes of the license-released bandwidth transmission burst being currently transmitted, (CSI-RS), CSI-RS (Channel State Information-Interference Measurement), and CRS / CSI-RS Device. The method of claim 14,
The processor includes a physical HARQ indicator channel (PHICH) defined for uplink HARQ (Hybrid Automatic Repeat reQuest) feedback, a Unlicensed Cell-Radio Network Temporary Identifier (U-RNTI) associated with a license- Wherein the signaling information generating unit generates the signaling information using at least one of the signaling information and the signaling information.

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