KR20140148277A - Methods for controlling multi-subframe scheduling and apparatuses thereof - Google Patents

Abstract

The present invention relates to a method and an apparatus for controlling multi-subframe scheduling. According to an embodiment of the present invention, the method for controlling, by a base station, multi-subframe scheduling comprises the following steps of: generating, by a base station, setting information required for a multi-subframe scheduling setting; transmitting, to a terminal, one or more downlinks among a first downlink including the setting information or a second downlink including indication information indicating the multi-subframe scheduling after the first downlink transmission; and allocating a downlink in N continuous downlink subframes calculated by the setting information and the indication information or performing an uplink grant in the N continuous uplink subframes.

Description

[0001] DESCRIPTION [0002] METHODS FOR CONTROLLING MULTI-SUBFRAME SCHEDULING AND APPARATUS [0003]

The present invention relates to a method and apparatus for controlling multi-sub-frame scheduling, and more particularly, to a technique for controlling uplink or downlink scheduling information of a UE under multi-sub-frame scheduling.

As communications systems evolved, consumers, such as businesses and individuals, used a wide variety of wireless terminals. The current mobile communication system such as LTE (Long Term Evolution) and LTE-Advanced of the 3GPP series is a high-speed and large-capacity communication system capable of transmitting and receiving various data such as video and wireless data beyond voice- It is required to develop a technique capable of transmitting large-capacity data in accordance with the above-described method. Meanwhile, it is necessary to increase the transmission efficiency of data by applying a multi-cell environment and multi-subframe scheduling so that such scheduling does not conflict with existing operations.

In order to solve the above-mentioned problem, it is necessary to control the uplink or downlink scheduling information of the UE under multiple sub-frame scheduling to increase the data transmission efficiency and to ensure compatibility with the legacy system. It is also necessary to reduce the error rate by providing a fallback operation for the transmission of information necessary for multi-sub-frame scheduling.

According to an aspect of the present invention, there is provided a method of controlling a multi-subframe scheduling according to an exemplary embodiment of the present invention includes generating configuration information required for multi-subframe scheduling by a Node B, Transmitting a first downlink including information or a second downlink including indication information indicating scheduling of multiple subframes after transmission of the first downlink to the terminal, Allocating a downlink in N consecutive downlink subframes calculated by the setting information and the instruction information or performing uplink grant in the N consecutive uplink subframes.

A method for controlling multiple sub-frame scheduling according to another embodiment of the present invention includes: receiving a first downlink including setting information necessary for setting up a multi-subframe scheduling; The method of claim 1, wherein the indication information included in the first downlink or the indication information included in the second downlink received after the transmission of the first downlink and the N downlinks in the N consecutive downlink subframes calculated using the setting information And performing an uplink grant in the N consecutive uplink subframes.

A base station controlling multiple sub-frame scheduling according to another embodiment of the present invention may include a receiver for receiving an uplink from a mobile station and generating configuration information required for multi-subframe scheduling, And generating a second downlink including indication information indicating the scheduling of the multiple sub-frames after transmission of the first downlink or the first downlink including the first downlink, And a second downlink, wherein the controller allocates a downlink in N consecutive downlink subframes calculated by the setting information and the indication information, or allocates the N consecutive downlink subframes And performs an uplink grant in the uplink sub-frame.

A terminal for controlling multiple sub-frame scheduling according to another embodiment of the present invention includes a transmitter for transmitting an uplink to a base station, a first downlink including setup information required for multi-subframe scheduling, And an indication information included in the second downlink received after the transmission of the first downlink and the N consecutive downlinks calculated using the setup information, And a controller for allocating a downlink in a subframe or performing an uplink grant in the N consecutive uplink subframes.

In the case of applying the present invention, it is possible to control the uplink or downlink scheduling information of the UE under multi-subframe scheduling to be transmitted, thereby increasing the data transmission efficiency. It is also possible to reduce the error rate by providing a fallback operation for transferring the information required for multiple subframe scheduling.

1 is a view showing a small cell development according to an embodiment.
2 is a diagram showing a small cell deployment scenario.
3 to 6 are diagrams showing detailed scenarios in the small cell deployment.
7 is a diagram illustrating a control region for transmitting a downlink control channel.
8 is a diagram illustrating transmission of control channels in one subframe.
FIG. 9 is a DCI format, which means a scheduling grant for uplink / downlink transmission.
FIG. 10 is a diagram illustrating one embodiment of multiple sub-frame scheduling.
11 is a diagram illustrating an operation of an entire base station according to an embodiment of the present invention.
12 is a diagram illustrating an operation procedure of the UE-specific RRC signaling according to the first embodiment of the present invention.
13 is a diagram illustrating an operation procedure of cell-specific RRC signaling according to the second embodiment of the present invention.
FIGS. 14 and 15 are diagrams illustrating a MAC structure for activating or deactivating multiple sub-frame scheduling based on a MAC CE according to a third embodiment of the present invention.
16 is a diagram showing operations of a terminal when Embodiments 1, 2, 3 and 4 are applied.
17 is a diagram illustrating a configuration of a base station according to another embodiment.
18 is a diagram illustrating a configuration of a user terminal according to another 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 numerals whenever 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.

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. Hereinafter, the user terminal may be referred to as a terminal in the present specification. Hereinafter, the user terminal may be referred to as a terminal in the present specification.

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), a transmission point (TP), a reception point It can be called another term.

In this specification, a base station or a cell is interpreted as a comprehensive meaning indicating a part or function covered by BSC (Base Station Controller) in CDMA, Node-B 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) a device itself providing a megacell, a macrocell, a microcell, a picocell, a femtocell, or a small cell in relation to a wireless region, or ii) 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 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 megacell, a macrocell, a microcell, a picocell, a femtocell, a small cell, an RRH, an antenna, an RU, a low power node (LPN), a point, an eNB, Quot;

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, the uplink and downlink are configured on the basis of one carrier or carrier pair to form a standard. 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 multiplex transmission / reception point to a terminal, and an uplink refers to a communication or communication path from a terminal to a multiplex 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, and PDSCH is expressed as 'PUCCH, PUSCH, PDCCH and PDSCH are transmitted and received'.

In the following description, the description that the PDCCH is transmitted or received or the signal is transmitted or received through the PDCCH may be used to mean transmitting or receiving the EPDCCH or transmitting or receiving the signal through the EPDCCH.

The physical downlink control channel described below may mean a PDCCH, an EPDCCH, or a PDCCH and an EPDCCH. For convenience of description, the PDCCH, which is an embodiment of the present invention, may be applied to the PDCCH.

In addition, the High Layer Signaling described herein includes RRC signaling for transmitting RRC information including RRC parameters.

An eNB, which is an embodiment of a base station, performs downlink transmission to terminals. 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 PDSCH, and uplink data channel 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.

1 is a view showing a small cell development according to an embodiment.

FIG. 1 shows a configuration in which a small cell and a macro cell coexist. In FIGS. 2 to 3, the presence or absence of macro coverage, whether the small cell is for outdoor use or indoor use, , Whether the development of the small cell is sparse or dense, or whether the same frequency spectrum as the macro is used in terms of spectrum or not.

2 is a diagram showing a small cell deployment scenario. Figure 2 shows a typical representative configuration for the scenario of Figure 3; Fig. 2 shows a small cell deployment scenario and includes scenarios # 1, # 2a, # 2b, and # 3. 200 represents a macro cell, and 210 and 220 represent a small cell. The overlapping macrocells in FIG. 2 may or may not exist. Coordination can be performed between the macro cell 200 and the small cells 210 and 220 and adjustment can also be performed between the small cells 210 and 220. And the overlapping regions of 200, 210, and 220 can be clustered.

3 to 6 are diagrams showing detailed scenarios in the small cell deployment.

Fig. 3 shows scenario # 1 in the small cell expansion. Scenario 1 is a co-channel deployment scenario for small cells and macro cells in the presence of overhead macros and is an outdoor small cell scenario. Reference numeral 310 denotes a case where both the macro cell 311 and the small cell are outdoors, and 312 denotes a small cell cluster. Users are distributed both indoors / outdoors.

The solid lines connecting the small cells in the small cell 312 mean a backhaul link within a cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

Fig. 4 shows the small cell deployment scenario # 2a. Scenario 2a is a deployment scenario in which small cells and macros use different frequency spectra in the presence of an overlaid macro, and is an outdoor small cell scenario. Both the macro cell 411 and the small cells are outdoors and 412 indicates a small cell cluster. Users are distributed both indoors / outdoors.

The solid lines connecting the small cells in the small cell 412 indicate a backhaul link within the cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

5 shows the small cell deployment scenario # 2b. Scenario 2b is a deployment scenario in which the small cell and the macro use different frequency spectrum in the presence of the overlay macro and is an indoor small cell scenario. The macro cell 511 is outdoors, the small cells are all indoors, and 512 is a small cell cluster. Users are distributed both indoors / outdoors.

The solid lines connecting the small cells in the small cell 512 indicate a backhaul link within the cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

6 shows the small cell deployment scenario # 3. Scenario 3 is an indoor small cell scenario with no coverage of macros. 612 indicates a small cell cluster. In addition, the small cells are all indoor and users are dispersed both indoors and outdoors.

The solid lines connecting the small cells in the small cell 612 mean a backhaul link within the cluster. The dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between small cells and macro cells.

Hereinafter, the downlink PDCCH and the DCI format will be described. 7 is a diagram illustrating a control region for transmitting a downlink control channel. In FIG. 7, the control region 710 includes transmission of PHICH, PCFICH, and PDCCH. The control area may be composed of 1 to 3 OFDM symbols (1 to 3 OFDM symbols), but the present invention is not limited to this, and the control area may be increased or decreased depending on the situation of the system. Here, the PDCCH is allocated and transmitted evenly over the area excluding the resources in which PHICH and PCFICH are used, to the number of OFDM symbols to which the PDCCH indicated by the PCFICH is transmitted. Control signaling and cell-specific reference symbols are distributed in sub-frames.

FIG. 8 is a diagram showing transmission of a control channel (control region for transmitting a control channel) in one subframe.

810 and 820 are examples of transmission of a PDSCH indicated by a control channel transmitted in every subframe upon transmission of a PDSCH on multiple carriers. CC # 1, # 2, and # 3 of the first elementary carriers 810 and 820 refer to the first elementary carrier, the second elementary carrier, and the third elementary carrier, respectively. 5 is a diagram illustrating transmission of a PDSCH indicated by a control channel transmitted in a subframe upon transmission of a PDSCH on a multiple carrier. Referring to FIG. 5, 810 is an example in which no cross-carrier scheduling ), The carrier indicator is not included in the DCI (Downlink control information). 810 schedules the corresponding PDSCH by separately presenting a PDCCH in each carrier independently of each carrier in self carrier scheduling on multiple carriers. This results in data transmission in each carrier by a control channel transmitted in every subframe within a 1 ms subframe. 820 represents cross carrier scheduling on multiple carriers and includes a carrier indicator in the DCI. The PDSCH is scheduled to be able to be scheduled on a plurality of carriers in one carrier, and a PDSCH capable of transmitting PDCCHs existing on one carrier on a plurality of carriers is scheduled. 820, data transmission in multiple carriers is performed by a control channel transmitted in every subframe in 1 ms subframe as in 810. [

FIG. 9 is a DCI format, which means a scheduling grant for uplink / downlink transmission. DCI formats are divided and transmitted according to each uplink / downlink transmission method and usage.

FIG. 10 is a diagram illustrating one embodiment of multiple sub-frame scheduling.

The scheduling information for the uplink / downlink data channels (PDSCH and PUSCH) for a UE belonging to any cell / base station / eNB / RRH / RU from the conventional technique is a physical control channel (PDCCH) Lt; / RTI > In particular, the PDSCH resource allocation information for an arbitrary UE in an arbitrary DL subframe is transmitted to the corresponding UE through the downlink PDCCH of the corresponding subframe. However, in the case of the small cell deployment scenario described above, since the mobility of a UE belonging to a small cell is frequently low, the state of the wireless channel state with respect to the base station varies with time compared to the conventional macro cell terminal . In this case, there is no need to dynamically change the scheduling information for PDSCH transmission such as modulation scheme (MCS) and frequency resource allocation at the time of downlink data transmission for each subframe. In this case, sub-frame scheduling (PDCCH) for assigning PDSCHs for a plurality of downlink sub-frames through DL Assignment information transmitted through one PDCCH or EPDCCH as a scheme for reducing control channel overhead ). ≪ / RTI >

According to a scheduling method in a conventional LTE / LTE-Advanced Rel-11 or lower system, one downlink-allocated DCI or UL grant may be assigned PDSCH allocation information in one downlink subframe or one uplink Only the PUSCH transmission resource allocation information in the subframe is included. However, when multiple sub-frame scheduling is applied as shown in FIG. 10, it is necessary for the BS to indicate the number of PDsCH or PUSCH allocated subframes through the corresponding DCI. In addition, It is necessary to define a fallback operation to prevent a radio link failure (RLF) according to the ambiguity of the setting.

The present invention allocates data channel transmission / reception resources of a plurality of subframes through one DCI in the method of transmitting uplink / downlink scheduling information of a UE belonging to any cell / base station / eNB / RRH / RU in the small cell environment And a fallback operation method of the terminal and the base station related thereto.

11 is a diagram illustrating an operation of an entire base station according to an embodiment of the present invention. The base station generates setup information necessary for multi-subframe scheduling (S1110), and transmits a first downlink including the setup information (S1120). S1110 may be UE-specific multiple subframe scheduling configuration information and cell-specific multiple subframe scheduling configuration information. In step S1130, the BS transmits a second downlink including indication information indicating multiple sub-frame scheduling according to the setting information of the first downlink. Of course, the first downlink may include indication information for indicating the multiple sub-frame scheduling, and may be transmitted. In this case, the BS can control the second downlink or the first downlink to be transmitted through a UE specific search space.

In addition, the BS performs an operation by multiple sub-frame scheduling in an operation with a UE, i.e., allocates a downlink in N consecutive downlink subframes calculated by the setup information and the instruction information, The uplink grant is performed in the uplink sub-frame (S1140).

Embodiments for configuring multi-subframe scheduling will be described.

Example  One

Embodiment 1 may set up multiple sub-frame scheduling via UE-specific RRC signaling.

An arbitrary base station / eNB / RRH / RU sets up multiple subframe scheduling for an arbitrary UE through UE-specific RRC signaling, and a MultiSubframeSchedulingConfig IE, which is a radio resource control information element (RRC IE), can be defined. The corresponding MultiSubframeSchedulingConfig IE has an 'mif-presence' parameter. When the corresponding parameter is set to 'TRUE', multi-subframe scheduling is set for the corresponding terminal. Accordingly, the DL-allocated DCI and the UL- (multi-subframe indicator field). The mif included in the DL allocation DCI is an information area indicating the number of PDSCH transmission downlink subframes allocated by the corresponding DL allocation DCI. That is, it means PDSCH allocation in consecutive N (where N is an arbitrary natural number) DL subframe according to the set value of mif. It is clear that the N values corresponding to the respective mif setting values can be variously defined. Likewise, for UL grant for PUSCH transmission of the UE, PUSCH resource allocation in N consecutive UL subframes can be performed according to the mif setting value in the corresponding UL grant. The size of the corresponding mif may be determined according to the number of PDSCH or PUSCH allocations consecutively allocated through multiple subframe scheduling.

The first embodiment is summarized in FIG.

12 is a diagram illustrating an operation procedure of the UE-specific RRC signaling according to the first embodiment of the present invention.

The base station configures the setup information required for multi-sub-frame scheduling of the UE to a MultiSubframeSchedulingConfig IE (S1210). The set information includes information necessary for scheduling multiple subframes, and the 'mif-presence' parameter is set to 'TRUE'. The IE is transmitted to the UE through RRC signaling (S1220). If the 'mif' field of the DCI format indicating downlink allocation or uplink grant is set to a natural number equal to or greater than 0 in order to perform multi-subframe scheduling set in the RRC signaling in the DCI format transmitted with or after the RRC signaling (S1230), scheduling is performed with the number of consecutive subframes calculated by the natural number indicated by the 'mif' field or in combination with the setting information. If the indication information indicating the scheduling of multiple sub-frames is included in the downlink allocation DCI format or the uplink grant DCI format as described above after the setting of the multiple sub-frame scheduling, the downlink allocation or up- Link grant is performed to perform multi-sub-frame scheduling (S1240).

Example  2

Embodiment 2 can set up multiple sub-frame scheduling via cell-specific RRC signaling.

An RRC / RN / RN / RN / ENB / RN / RN / RN / RN / RN / RN / RN / If frame scheduling is supported, RRC parameter setting information for supporting this is broadcast. If multi-subframe scheduling is set to be supported in the corresponding cell, the DL allocation DCI or UL grant DCI for any UE in the cell includes the above mif field.

The second embodiment is summarized in FIG.

13 is a diagram illustrating an operation procedure of cell-specific RRC signaling according to the second embodiment of the present invention.

The base station configures the setup information necessary for scheduling multiple sub-frames of the cell into a MultiSubframeSchedulingConfig IE (S1310). The set information includes information necessary for scheduling multiple subframes, and the 'mif-presence' parameter is set to 'TRUE'. The IE is broadcasted to the terminals of the entire cell by RRC signaling (S1320). When the 'mif' field of the DCI format indicating downlink allocation or uplink grant is set to a natural number equal to or greater than 0 in order to perform multi-subframe scheduling set in the RRC signaling in the DCI format transmitted with or after the RRC signaling (S1330), scheduling is performed with the number of consecutive subframes calculated by the natural number indicated by the 'mif' field or in combination with the setting information. If the indication information indicating the scheduling of multiple sub-frames is included in the downlink allocation DCI format or the uplink grant DCI format as described above after the setting of the multiple sub-frame scheduling, the number of consecutive sub- Link grant is performed and multi-sub-frame scheduling is performed (S1340).

Example  3

The third embodiment provides MAC CE based activation / deactivation of multi-subframe scheduling.

After setting parameters related to multiple sub-frame scheduling for each UE or for each cell in advance through the first or second UE-specific or cell-specific RRC signaling, May be initiated and directed via MAC CE signaling. That is, multiple sub-frame scheduling related parameters through RRC signaling are applied and multiple sub-frame scheduling application including mif in DL allocation DCI or UL grant can be activated or deactivated by MAC CE signaling for each UE.

That is, Embodiment 3 can be applied to Figs. 12 and 13, and when the indication information of S1230 of Fig. 12 and S1330 of Fig. 13 is activated using MAC signaling, if the mif is included in the DL allocation DCI or UL grant, It is possible to perform downlink allocation or an operation corresponding to the uplink grant in consecutive subframes by using the mif value and the cell-specific or UE-specific multiple subframe scheduling configuration information.

FIGS. 14 and 15 are diagrams illustrating a MAC structure for activating or deactivating multiple sub-frame scheduling based on a MAC CE according to a third embodiment of the present invention.

14 is a diagram showing a configuration of a MAC header.

1410 shows an index of a conventional MAC header, and 1320 shows an example in which an index "11010" is indicated to perform multi-subframe scheduling in order to apply the present invention.

15 is a diagram showing a configuration of a MAC subheader.

In FIG. 15, reference numeral 1510 denotes a MAC header, and indicates " 11010 "for scheduling multiple subframes. On the other hand, in 1520, a cross subframe is set to be set for each cell, and 1529 is a reserved bit and 1521 is set to '1' to activate a cross subframe of a cell of SCellIndex 3. That is, in the configuration of FIG. 15, it is indicated that the cross sub-frame scheduling is activated in the cell of SCellIndex 3.

Example  4

Next, a fallback operation for multi-subframe scheduling will be described.

When multiple sub-frame scheduling is set for an arbitrary UE according to Embodiments 1, 2 and 3, a DL-allocated DCI or UL grant for the corresponding UE includes a new information region mif. However, in the RRC setting ambiguity period in which the synchronization between the UE and the BS may not be synchronized with the corresponding multiple subframe scheduling setting during a period in which RRC signaling is required in a multi-subframe scheduling configuration process between the UE and the BS, (RRC signaling transmission / reception error) for multi-sub-frame scheduling occurs, the multiple sub-frame scheduling setup motive in the base station and the UE does not match . In this case, the UE can not perform successful blind decoding on the DCI transmitted on the PDCCH or the EPDCCH, and RLF may occur. In order to prevent this, existing information that is newly included or interpreted in the DL-assigned DCI or UL grant only when setting the mif information area or other multi-subframe scheduling according to the multi-subframe scheduling setting It is defined that it is included or applied only in the DCI transmitted through the PDCCH USS (UE-specific Search Space) or the EPDCCH USS for the corresponding UE, and is defined to be applied to the DL allocated through the PDCCH or the EPDCCH CSS (Common Search Space) The DCI or UL grant does not include any new information areas added with respect to multiple subframe scheduling such as mif, regardless of whether multiple subframe scheduling is set or not.

16 is a diagram showing operations of a terminal when Embodiments 1, 2, 3 and 4 are applied.

The UE receives the first downlink including the setup information necessary for setting the multiple sub-frame scheduling (S1610). The UE transmits indication information included in the first downlink or indication information included in the second downlink received after the transmission of the first downlink and N consecutive downlink subframes calculated using the setting information, And performs an uplink grant in the N consecutive uplink subframes (S1620 and S1630). In more detail, the UE uses the indication information included in the first downlink or the indication information included in the second downlink received after the first downlink reception, and the setting information to perform multi-subframe scheduling (S1620), and receives the downlink by allocating the downlink in consecutive N downlink subframes by using the information, or receives the uplink in the N uplink subframes according to the uplink grant (S1630).

In the first embodiment, the setting information is configured by an information element of UE-Specific RRC signaling, and the indication information indicating the multiple sub-frame scheduling is transmitted to the first downlink or the 2 < / RTI > downlink DCI format. In particular, the indication information included in the DCI format may indicate the number of consecutively allocated subframes. That is, the indication information is consecutively allocated to transmit the PUSCH in the DL subframe in which the PDSCH allocation is consecutively performed in the downlink subframe indicating downlink allocation or in the uplink grant transmitted in the uplink grant And the number of uplink subframes.

In the case of the second embodiment, the configuration information includes information elements of cell-specific RRC signaling, the UE receives the first downlink transmitted through broadcast, The second downlink may be received through the UE specific search space of the UE.

In the case of the third embodiment, the setting information is composed of information elements of UE-specific or cell-specific RRC signaling, and indication information indicating activation or deactivation of the multi-subframe scheduling is included in the first And may be included in MAC signaling of the downlink or the second downlink.

According to the fourth embodiment, the UE can receive the first downlink or the second downlink through a Physical Downlink Control Channel (PDCCH) or a UE specific search space of an EPDCCH have.

17 is a diagram illustrating a configuration of a base station according to another embodiment.

17, a base station 1700 according to another embodiment includes a control unit 1717, a transmission unit 1720, and a reception unit 1730.

The control unit 1710 may transmit the uplink / downlink scheduling information of the UEs belonging to any cell / base station / eNB / RRH / RU in a small cell environment required for performing the above- A multi-subframe scheduling setting for allocating data channel transmission / reception resources of a subframe, and an overall base station operation according to a fallback operation of a terminal and a base station.

The transmitting unit 1720 and the receiving unit 1730 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

In more detail, the receiver 1730 receives the uplink from the UE, and the controller 1710 generates the setup information required for multi-subframe scheduling, and transmits the setup information to the first downlink Or the second downlink including indication information indicating the multiple sub-frame scheduling after transmission of the first downlink. The transmitter 1720 transmits at least one of the first downlink and the second downlink generated by the controller to the terminal, and the controller 1710 transmits N consecutive And performs uplink grant in the N consecutive uplink subframes. The N may be an integer equal to or greater than 0 or a natural number equal to or greater than 1.

In the first embodiment, the setting information is composed of information elements of UE-Specific RRC signaling, and the controller 1710 transmits instruction information for instructing multiple sub-frame scheduling to the first downlink Link or the DCI format of the second downlink.

More specifically, the controller 1710 determines whether the PUSCH in the DL subframe in which the uplink grant is transmitted or the number of downlink subframes in which the PDSCH allocation is consecutively performed in the downlink subframe in which the indication information indicates downlink allocation The first downlink or the second downlink may be generated so as to indicate any one of the number of uplink subframes continuously allocated for transmission.

In the second embodiment, the controller 1710 configures the setup information as an information element of cell-specific RRC signaling, and the transmitter 1720 transmits the first downlink as a broadcast And the second downlink may be transmitted through a UE specific search space of the UE.

In the third embodiment, the controller 1710 configures the setting information as an information element of UE-specific or cell-specific RRC signaling, and instructs to activate or deactivate the multi-subframe scheduling And may be included in the MAC signaling of the first downlink or the second downlink.

For the fallback operation of the fourth embodiment, the controller 1710 determines whether a first downlink or a second downlink is a UE specific search space of a physical downlink control channel (PDCCH) or an EPDCCH The transmission unit 1720 can be controlled by the control unit 1720. [

18 is a diagram illustrating a configuration of a user terminal according to another embodiment.

18, a user terminal 1800 according to another embodiment includes a receiving unit 1830, a control unit 1810, and a transmitting unit 1820.

The receiver 1830 receives downlink control information, data, and a message from the base station through the corresponding channel.

In addition, the control unit 1810 may transmit the uplink / downlink scheduling information of a UE belonging to any cell / base station / eNB / RRH / RU in a small cell environment necessary for performing the above- Sub-frame scheduling for allocating data channel transmission / reception resources of the sub-frame of the sub-frame and the overall operation of the terminal according to the fallback operation of the terminal and the base station.

The transmitter 1820 transmits uplink control information, data, and a message to the base station through the corresponding channel.

In more detail, the transmitter 1820 transmits an uplink to a base station, the receiver 1830 receives a first downlink including configuration information required for multi-subframe scheduling, The control unit 1810 may transmit the indication information included in the first downlink or the indication information included in the second downlink received after the transmission of the first downlink and the N consecutive downlinks calculated using the setting information, Subframes are allocated a downlink or an uplink grant is performed in the N consecutive uplink subframes.

In the first embodiment, the setting information is composed of information elements of UE-Specific RRC signaling, and the indication information is included in the DCI format of the first downlink or the second downlink. Multiple sub-frame scheduling can be instructed.

In more detail, the indication information indicates the number of downlink subframes in which the PDSCH allocation is consecutively performed in the downlink subframe indicating the downlink allocation, or the number of consecutive allocated subframes to transmit the PUSCH in the downlink subframe in which the uplink grant is transmitted And the number of uplink subframes.

In the second embodiment, the setting information is composed of information elements of cell-specific RRC signaling, and the receiver 1830 receives the first downlink transmitted through broadcast, The second downlink may be received through the UE specific search space of the UE.

In the third embodiment, the setting information is configured by an information element of UE-specific or cell-specific RRC signaling, and the indication information indicating activation or deactivation of the multi-subframe scheduling is transmitted to the first downlink And may be included in the MAC signaling of the second downlink.

For the fallback operation of the fourth embodiment, the receiving unit 1830 receives the UE specific search space of the Physical Downlink Control Channel (PDCCH) or the EPDCCH of the first downlink or the second downlink, Lt; / RTI >

The present invention thus far described proposes a HARQ process number allocation scheme according to the downlink data channel scheduling scheme for an arbitrary UE in the 3GPP LTE / LTE-A system, and particularly supports multiple subframe scheduling or cross-scheduling The HARQ process number for the UE can be allocated.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (24)

A method for a base station to control multiple sub-frame scheduling,
The base station generating setup information necessary for multi-subframe scheduling;
Transmitting to the MS any one or more downlinks among a first downlink including the setting information or a second downlink including indication information indicating scheduling of multiple sub-frames after transmission of the first downlink; ; And
Allocating a downlink in N consecutive downlink subframes calculated by the setting information and the instruction information, or performing an uplink grant in the N consecutive uplink subframes.
The method of claim 1, wherein
The setting information is composed of information elements of UE-Specific RRC signaling,
And indication information indicating multiple sub-frame scheduling is included in the DCI format of the first downlink or the second downlink.
The method according to claim 2, wherein
The indication information includes a number of downlink subframes in which PDSCH allocation is consecutively performed in a downlink subframe indicating downlink allocation, or a number of uplink subframes allocated consecutively to transmit a PUSCH in a downlink subframe in which the uplink grant is transmitted The number of subframes, and the number of subframes.
The method of claim 1, wherein
The setting information is composed of information elements of cell-specific RRC signaling,
Wherein the base station transmits the first downlink through a broadcast, and the second downlink transmits through a UE specific search space of the terminal.
The method of claim 1, wherein
The configuration information may comprise information elements of UE-specific or cell-specific RRC signaling,
Wherein indication information indicating activation or deactivation of the multiple sub-frame scheduling is included in the MAC signaling of the first downlink or the second downlink.
The method according to claim 1,
Wherein at least one of the first downlink and the second downlink is transmitted through a Physical Specific Downlink Control Channel (PDCCH) or a UE specific search space of an EPDCCH.
A method for controlling multiple sub-frame scheduling by a UE,
Receiving a first downlink including configuration information necessary for setting up a multi-subframe scheduling; And
The method as claimed in claim 1, further comprising the steps of: determining whether the downlink information is included in the N downlink subframes calculated using the indication information included in the first downlink or the indication information included in the second downlink received after the transmission of the first downlink, Or performing an uplink grant in the N consecutive uplink subframes.
The method of claim 6, wherein
The setting information is composed of information elements of UE-Specific RRC signaling,
And indication information indicating multiple sub-frame scheduling is included in the DCI format of the first downlink or the second downlink.
The method of claim 8, wherein
The indication information includes a number of downlink subframes in which PDSCH allocation is consecutively performed in a downlink subframe indicating downlink allocation, or a number of uplink subframes allocated consecutively to transmit a PUSCH in a downlink subframe in which the uplink grant is transmitted The number of subframes, and the number of subframes.
The method of claim 7, wherein
The setting information is composed of information elements of cell-specific RRC signaling,
Wherein the UE receives the first downlink transmitted through broadcast and the second downlink receives through a UE specific search space of the UE.
The method of claim 7, wherein
The configuration information may comprise information elements of UE-specific or cell-specific RRC signaling,
Wherein indication information indicating activation or deactivation of the multiple sub-frame scheduling is included in the MAC signaling of the first downlink or the second downlink.
8. The method of claim 7,
Wherein at least one of the first downlink and the second downlink is received through a Physical Specific Downlink Control Channel (PDCCH) or a UE specific search space of an EPDCCH.
A base station controlling multiple sub-frame scheduling,
A receiver for receiving an uplink from a terminal;
Subframe scheduling, and includes instruction information for instructing the multi-subframe scheduling after transmission of the first downlink or the first downlink including the setup information A second downlink control unit for generating a second downlink; And
And a transmitter for transmitting at least one of a first downlink and a second downlink generated by the controller to the terminal,
Wherein the controller allocates a downlink in N consecutive downlink subframes calculated by the setting information and the instruction information or performs an uplink grant in the N consecutive uplink subframes.
The method of claim 13, wherein
The setting information is composed of information elements of UE-Specific RRC signaling,
Wherein the control unit includes indication information for instructing multiple sub-frame scheduling in the DCI format of the first downlink or the second downlink.
The method of claim 14, wherein
The control unit continuously allocates the number of downlink subframes in which the PDSCH allocation is consecutively performed in the downlink subframe indicating the downlink allocation or the PUSCH in the downlink subframe in which the uplink grant is transmitted, The first downlink or the second downlink to indicate any one of the number of uplink subframes.
The method of claim 13, wherein
The controller configures the setting information as an information element of cell-specific RRC signaling,
Wherein the transmitter transmits the first downlink through a broadcast and the second downlink transmits through a UE specific search space of the terminal.
The method of claim 13, wherein
Wherein the controller configures the configuration information as information elements of UE-specific or cell-specific RRC signaling, and transmits indication information indicating activation or deactivation of the multiple subframe scheduling to the first downlink or the second downlink, And includes it in MAC signaling of the second downlink.
14. The method of claim 13,
The control unit controls the transmitting unit to transmit at least one of the first downlink and the second downlink through a Physical Specific Downlink Control Channel (PDCCH) or a UE specific search space of an EPDCCH .
In a terminal that controls multiple sub-frame scheduling,
A transmitter for transmitting an uplink to a base station;
A receiver for receiving a first downlink including setting information necessary for multi-subframe scheduling; And
The method as claimed in claim 1, further comprising the steps of: determining whether the downlink information is included in the N downlink subframes calculated using the indication information included in the first downlink or the indication information included in the second downlink received after the transmission of the first downlink, And performing uplink grant in the N consecutive uplink subframes.
The method of claim 19, wherein
The setting information is composed of information elements of UE-Specific RRC signaling,
Wherein the indication information indicates multiple sub-frame scheduling included in the DCI format of the first downlink or the second downlink.
The method of claim 20, wherein
The indication information includes a number of downlink subframes in which PDSCH allocation is consecutively performed in a downlink subframe indicating downlink allocation, or a number of uplink subframes allocated consecutively to transmit a PUSCH in a downlink subframe in which the uplink grant is transmitted The number of subframes, and the number of subframes.
The method of claim 19, wherein
The setting information is composed of information elements of cell-specific RRC signaling,
Wherein the receiver receives the first downlink transmitted through broadcast and the second downlink receives through a UE specific search space of the terminal.
The method of claim 19, wherein
The configuration information may comprise information elements of UE-specific or cell-specific RRC signaling,
Wherein indication information indicating activation or deactivation of the multiple sub-frame scheduling is included in MAC signaling of the first downlink or the second downlink.
20. The method of claim 19,
Wherein the receiving unit receives the at least one of the first downlink and the second downlink through a physical downlink control channel (PDCCH) or a UE specific search space of an EPDCCH.

Images