KR20170100110A - Method and apparatus for scheduling for access link according to slot based TTI - Google Patents

Method and apparatus for scheduling for access link according to slot based TTI Download PDF

Info

Publication number
KR20170100110A
KR20170100110A KR1020160022148A KR20160022148A KR20170100110A KR 20170100110 A KR20170100110 A KR 20170100110A KR 1020160022148 A KR1020160022148 A KR 1020160022148A KR 20160022148 A KR20160022148 A KR 20160022148A KR 20170100110 A KR20170100110 A KR 20170100110A
Authority
KR
South Korea
Prior art keywords
slot
subframe
scheduling
transmission
transmitted
Prior art date
Application number
KR1020160022148A
Other languages
Korean (ko)
Inventor
성기순
임순용
Original Assignee
한국전자통신연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to KR1020160022148A priority Critical patent/KR20170100110A/en
Publication of KR20170100110A publication Critical patent/KR20170100110A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Abstract

Provided are a method and an apparatus for scheduling an access link in a slot-based transmission time interval (TTI). A scheduling method based on a wireless frame, in which a frame and a frame supporting an existing service coexist, comprises: a step of performing scheduling based on a slot-by-slot TTI; and a step of transmitting control information including resource allocation information according to scheduling through a control channel of a subframe constituting the wireless frame. The control information controls a first slot and a second slot constituting one subframe. Accordingly, the present invention can minimize delay in an access link.

Description

METHOD AND APPARATUS FOR SCHEDULING ACCESS LINKS OF SLOT-BASED TITLE i < RTI ID = 0.0 >

The present invention relates to a scheduling method, and more particularly, to a method and apparatus for scheduling an access link in a slot-based transmission time interval (TTI).

In a mobile communication system, an access link between a terminal and a base station is accompanied by a certain delay. In the case of long term evolution-advanced (LTE-A), a one-way latency has a delay of about 5 ms Suffer. In recent years, various studies have been conducted to accommodate various applications such as real-time control, tactile internet, and machine type communication (MTC) in the mobile communication network, and low latency technology has begun to emerge. Low latency requirements have been added in the element technology. In addition, research items for low-delay transmission and reception are being standardized.

The delay factors generated in the access link include a time period for processing data transmitted and received by each of the mobile station and the base station, and a delay occurring in an air interval. A delay time due to a transmission interval, In order to realize a low delay. For example, in the case of the existing LTE and LTE-A systems, 1 ms is defined as 1 TTI (Transmission Time Interval). Studies are under way to reduce the transmission time by narrowing the transmission time interval. Accordingly, it is an issue of how to reduce the transmission interval, and in view of the present technical requirements, a frame structure in which a 1 / 2ms slot is set as 1 TTI out of the frame structure in which the conventional 1ms is set as one TTI Is likely to rise. Therefore, a slot-based TTI requires a different structure from that of the conventional frame structure, and a scheduling scheme also needs a separate scheme to match the changed structure.

A problem to be solved by the present invention is to provide a frame structure based on a slot-based TTI for realizing a low-delay service, and to provide a scheduling method and apparatus suitable for the frame structure.

The scheduling method according to an aspect of the present invention is a scheduling method based on a radio frame in which a low delay frame and a frame supporting an existing service coexist, and performs scheduling based on slot-by-slot transmission time interval (TTI) step; And transmitting control information including resource allocation information according to the scheduling through a control channel of a subframe constituting the radio frame, wherein the control information includes a first slot and a second slot, 2 slots.

A low delay data area is allocated in an area for downlink data transmission in each subframe of the radio frame, a low delay data area is allocated in an area for uplink data transmission, and a low delay data area is allocated to each subframe in the uplink. A control area for transmitting information can be allocated.

In this case, ACK (acknowledgment) / NACK (negative ACK) for data transmitted in the subframe #n (n is an integer) is transmitted in the subframe # (n + 2 may be scheduled to be transmitted in the first slot and the second slot, respectively. The method may further include the step of performing scheduling so that retransmission of data transmitted in the subframe #n is performed in the subframe # (n + 5) after the step of transmitting through the control channel .

In the scheduling, data transmission is performed in the first slot and the second slot of the subframe # (n + 2) according to the control information transmitted in the subframe #n in the uplink transmission, respectively . The method further comprises scheduling to allocate new control information in subframe # (n + 5) for retransmission of data transmitted in the subframe # (n + 2) after the step of transmitting through the control channel. May be performed.

Here, the method may further include performing HARQ (Hybrid Automatic Repeat reQuest) of a multi-process structure, wherein the HARQ process number is allocated from 0 to 4, and the number of HARQ processes is 5 have.

In the scheduling, in the downlink transmission, an ACK / NACK for data transmitted through the first slot of the subframe #n is transmitted in the first slot of the subframe # (n + 2) Can be performed. The method may further include the step of performing scheduling so that retransmission of data transmitted in the subframe #n is performed in the subframe # (n + 4) after the step of transmitting through the control channel, The scheduling in the subframe # (n + 4) may be performed based on the channel information transmitted in the second slot of the subframe # (n + 2).

In the scheduling, in the uplink transmission, data is transmitted in the first slot and the second slot of the subframe # (n + 2) according to the control information transmitted in the subframe #n, respectively Scheduling can be done. The method further includes transmitting ACK / NACK information for data transmitted in the first slot and the second slot of the subframe # (n + 2) to the subframe # n +4) < / RTI > And scheduling is performed so that new control information is allocated in subframe # (n + 4) for retransmission of data transmitted in subframe # (n + 2).

Herein, the method may further include performing HARQ (Hybrid Automatic Repeat reQuest) of a multi-process structure, wherein the HARQ process number is allocated from 0 to 3, and the number of HARQ processes is 4 have.

On the other hand, in each subframe of the radio frame, a first low-delay data area is allocated to an area for data transmission of the first slot, and a second low-delay data area is allocated to an area for data transmission of the second slot Wherein the first slot operates at a first transmission interval and the second slot operates at a second transmission interval, wherein the first transmission interval is a slot-based transmission interval, Lt; / RTI >

In this case, the step of transmitting through the control channel may include: first control information including resource allocation information for a low-delay transmission through a first slot of the first transmission interval; And second control information including resource allocation information for a normal delay transmission through the first and second transmission paths.

In the scheduling, ACK / NACK for data to be transmitted according to the first control information in the first slot of the subframe #n in the downlink transmission is performed in the subframe # (n + 2) 1 slot and an ACK / NACK for data to be transmitted in the second control information in the second slot of the subframe #n is transmitted in the first slot of the subframe # (n + 4) have.

The method further comprises, after transmission through the control channel, retransmission of data transmitted according to the first control information in a first slot of the subframe #n is indicated in subframe # (n + 4) , And scheduling is performed such that retransmission of data transmitted in the second slot of the subframe #n according to the second control information is indicated in the subframe # (n + 8).

In the scheduling, in the uplink transmission, data is transmitted in the first slot of the subframe # (n + 2) according to the first control information of the subframe #n, and the subframe #n The scheduling may be performed such that data transmission is performed in the second slot of subframe # 4 according to the second control information of subframe # 4.

(N + 4), retransmission of data transmitted in the first slot of the subframe # (n + 2) is indicated in the subframe # (n + 4) after the step of transmitting through the control channel, And scheduling is performed such that retransmission of data transmitted in the second slot of frame # 4 is indicated in sub-frame # (n + 8).

Here, the control information may include information for data transmitted through the first slot and information for data transmitted through the second slot, and the downlink control information may include DCI format 1F for DCI and DCI Format 1E, and the uplink control information may be configured based on the DCI format 0A format for low-power consumption.

According to another aspect of the present invention, there is provided a scheduling apparatus based on a radio frame in which a low delay frame and a frame supporting an existing service coexist, a radio frequency converter for transmitting / receiving a signal through an antenna, Wherein the scheduler performs scheduling based on a slot-based TTI, and transmits control information including resource allocation information according to the scheduling to control of a subframe constituting the radio frame, Controls the radio frequency converter to transmit the control information through the channel, and the control information controls the first slot and the second slot constituting one subframe.

The ACK / NACK for the data transmitted in the subframe #n (n is an integer) is transmitted in the first slot and the second slot of the subframe # (n + 2) respectively in the downlink transmission process , Performs retransmission of data transmitted in the subframe #n in the subframe # (n + 5), performs scheduling in the subframe #n in accordance with control information transmitted in the subframe #n, (n + 5) to perform data transmission in the first slot and the second slot of the subframe # (n + 2), and to retransmit the data transmitted in the subframe # Scheduling can be performed so that information is allocated.

Also, the ACK / NACK for the data transmitted through the first slot of the subframe #n is transmitted in the first slot of the subframe # (n + 2) in the downlink transmission process, (n + 2) according to the control information transmitted in the subframe #n during the uplink transmission processing, and performs scheduling so that retransmission of the data transmitted in the subframe #n is performed in the subframe # (N + 4) are allocated for retransmission of data transmitted in the subframe # (n + 2), and data is transmitted in the first slot and the second slot of the subframe # Scheduling can be performed.

Wherein in each subframe of the radio frame the first slot operates at a first transmission interval and the second slot operates at a second transmission interval, the first transmission interval is a slot-based transmission interval, Wherein the transmission interval is a subframe-based transmission interval, the processor includes first control information including resource allocation information for a low-delay transmission through a first slot of the first transmission interval, And second control information including resource allocation information for normal delay transmission through the first slot and the second slot, respectively.

Also, in the downlink transmission process, when the ACK / NACK for the data transmitted in the first slot of the subframe #n is transmitted according to the first control information in the first slot of the subframe # (n + 2) And performs ACK / NACK for data transmitted from the second slot of the subframe #n to the second control information to be transmitted in the first slot of the subframe # (n + 4), and performs uplink (N + 2) in the first slot in accordance with the first control information of the subframe #n in the transmission process, and in accordance with the second control information of the subframe #n, the subframe # Lt; RTI ID = 0.0 > 4, < / RTI >

According to the embodiment of the present invention, low-delay services such as real-time control, tactile internet, MTC, vehicle to everything (V2X) can be accommodated in a mobile communication network and scheduling is performed based on a radio access frame having a slot- , The delay in the access link can be minimized.

1 is a diagram illustrating resource allocation according to downlink scheduling in a mobile communication system.
2 is a diagram illustrating a structure of a radio frame based on an sTTI according to an embodiment of the present invention.
3 illustrates sTTI-based scheduling according to an embodiment of the present invention.
4 is a diagram illustrating a downlink and uplink transmission process.
5 is an exemplary diagram illustrating a scheduling process.
6 is a diagram illustrating a scheduling process according to a first example of the first embodiment of the present invention.
7 is a diagram illustrating HARQ of downlink scheduling according to a first example of the first embodiment of the present invention.
8 is a diagram illustrating a scheduling process according to a second example of the first embodiment of the present invention.
9 is a diagram illustrating HARQ of uplink scheduling according to a second example of the first embodiment of the present invention.
10 is a diagram illustrating a scheduling process according to a first example of the second embodiment of the present invention.
11 is a diagram illustrating HARQ of downlink scheduling according to the first example of the second embodiment of the present invention.
12 is a diagram illustrating a scheduling process according to a second example of the second embodiment of the present invention.
13 is a diagram illustrating HARQ of uplink scheduling according to a second example of the second embodiment of the present invention.
14 is a diagram illustrating a radio frame structure according to a third embodiment of the present invention.
15 is a diagram illustrating a scheduling process according to a third embodiment of the present invention.
16 is a diagram illustrating a scheduling process according to a first example of the third embodiment of the present invention.
17 is a diagram illustrating HARQ of downlink scheduling according to the first example of the third embodiment of the present invention.
18 is a diagram illustrating a scheduling process according to a second example of the third embodiment of the present invention.
19 is a diagram illustrating HARQ of uplink scheduling according to a second example of the third embodiment of the present invention.
20 is a structural diagram of a scheduling apparatus 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, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding 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, eNodeB), an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) (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 HNB, a pico BS, a metro BS, a micro BS, ), Etc., and may be all or part of an ABS, a Node B, an eNodeB, an AP, a RAS, a BTS, an MMR-BS, an RS, an RN, an ARS, It may include a negative feature.

Hereinafter, a scheduling method and apparatus according to an embodiment of the present invention will be described with reference to the drawings.

A 1ms Transmission Time Interval (TTI) is referred to as a "TTI" and a slot-based TTI is referred to as a "sTTI" in a mobile communication system (for example, LTE and LTE-A). The TTI represents the basic transmission interval, and is the time it takes to transmit one subframe. One subframe consists of two consecutive slots. For convenience of description, a slot located in front of two consecutive slots is referred to as a "first slot ", and a slot located after the second slot is referred to as a" . Here, "first" and "second" are used for distinguishing rather than indicating an order characteristic. The length of one subframe may be, for example, 1 ms, and the length of one slot may be 0.5 ms. One subframe may be composed of about 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols.

In the mobile communication system, scheduling is performed in units of subframes (e.g., 1 ms TTI unit).

1 is a diagram illustrating resource allocation according to downlink scheduling in a mobile communication system.

For example, as shown in FIG. 1, one to three symbols are allocated to a head of a subframe as a control channel (for example, a physical downlink control channel (PDCCH)) and a downlink PDSCH physical downlink shared channel) or a physical uplink shared channel (PUSCH) of the uplink.

This resource allocation information is valid for the corresponding subframe in the downlink and valid in the subframe after the four subframes in the uplink. In this structure, HARQ (Hybrid Automatic Repeat reQuest) RTT (HARQ RTT) maintains 8 TTIs.

In the embodiment of the present invention, the transmission unit is determined in units of slots rather than in units of subframes as described above, and scheduling is performed based on the determined units. That is, scheduling is performed based on sTTI, which is a slot-based TTI. For the sTTI-based scheduling, the low-delay frame is set to the channel bandwidth.

2 is a diagram illustrating a structure of a radio frame based on an sTTI according to an embodiment of the present invention.

The radio frame based on the sTTI according to the embodiment of the present invention includes a low delay frame as shown in FIG. The low-delay frame is configured to coexist on a frame (for example, an LTE frame) supporting an existing service.

Specifically, as illustrated in FIG. 2, an area for downlink data transmission, for example, a PDSCH for low jitter is assigned to a PDSCH area, and this is referred to as "LL (low latency) -PDSCH ". The PDSCH region is under the control of a control channel located at the head of the subframe. In the subframe #n including the two slots (slot # 0, slot # 1), the LL-PDSCH of the first slot (slot # 0) occupies the remaining time area excluding the control channel area for control message delivery , And the LL-PDSCH of the second slot (slot # 1) occupies the entire time domain.

On the other hand, an uplink PUSCH is assigned to an area for uplink data transmission, for example, a PUSCH area, and this is called "LL-PUSCH ". The PUSCH area is under the control of the control channel at the head of the downlink server frame arriving before four subframes. In the uplink, a control region for transmitting uplink control information (UCI), that is, a PUCCH is allocated and called "LL-PUCCH".

In the embodiment of the present invention, in order to realize the sTTI-based low-delay transmission, the LL-PDSCH. LL-PUSCH, and LL-PUCCH.

In a mobile communication system (e.g., an LTE system), control information such as PDSCH / PUSCH resource allocation, transmission format, and HARQ information necessary for transmitting and receiving data is transmitted in a downlink control information (DCI) format and transmitted on a control channel. A different DCI format is defined for each uplink and downlink and / or a transmission mode, and a DCI format is selected and used according to characteristics of each situation.

DCI is also used in slot-based TTI-based frames. Unlike the conventional TTI-based scheduling in units of subframes, in a slot-based TTI-based scheduling according to an embodiment of the present invention, one DCI controls two sTTIs. That is, one DCI takes charge of two sTTI controls.

3 illustrates sTTI-based scheduling according to an embodiment of the present invention.

The DCI for downlink resource allocation controls the first slot (slot # 0) and the second slot (slot # 1) of the LL_PDSCH in the corresponding subframe. The UL grant DCI controls the first slot (slot # 0) and the second slot (slot # 1) of the LL_PDSCH in the subframe after a distance of four slots, i.e., two subframes.

Based on the information contained in one DCI transmitted through a control channel, the UE processes data on a slot basis instead of a subframe, and transmits the processed data to an upper protocol. To this end, the terminal must be able to know from the DCI that it is operating in a low delay mode. The blocking DCI includes information for 1 st TB and 2 nd TB for slot-based data processing.

Embodiments of the present invention provide a low-delay DCI format that represents a low-delay mode.

In the case of downlink, the low-power DCI format includes DCI format 1E and DCI format 1F.

The DCI format 1E is a basic downlink allocation format that does not use spatial multiplexing, and is a format in which DCI format 1 used for discontinuous resource block allocation is extended for blocking. Unlike DCI format 1, the DCI format 1E includes MCSs for 2 nd transport blocks (TBs), including DCI format 1 fields (e.g., a carrier indicator field and an RB a modulation and coding scheme field, a redundancy version (RV) field, and a new data indication (NDI) field.

The DCI format 1F is a basic downlink allocation format that does not use spatial multiplexing, and is a format in which the DCI format 1A used for continuous resource block allocation is extended for blocking. DCI format IF includes fields of DCI format 1, and uses MCS field, RV field, and NDI field for 2 nd TB in addition to DCI format 1A.

The existing 2 nd TB field is a field used to transmit the corresponding TB information when two TBs are transmitted at a time by spatial multiplexing. In the embodiment of the present invention, since two slot-based TBs are allowed in one DCI in low-delay transmission, DCI format 1E and DCI format 1F are configured using the 2 nd TB field.

When the UE receives the DCI format 1E or the DCI format 1F through the downlink control channel, the UE determines the resource position in the subframe using the carrier indicator field and the RB allocation type field, which are the resource information included in the DCI format 1E or the DCI format 1F And processes the received data through the corresponding resource location in units of one slot of TB size and delivers the processed data to the upper layer.

In this manner, the DCI format 1F and the DCI format 1E for downlink blocking according to an embodiment of the present invention are configured using the existing DCI field to transmit downlink resource allocation and other information.

Meanwhile, in the case of the uplink, the DCI format for low jitter according to the embodiment of the present invention includes DCI format 0A for low jitter.

The stop DCI format 0A is a format in which the DCI 0 used for the uplink resource allocation format that does not use spatial multiplexing is extended for low delay. The blocking-enabled DCI format 0A includes the fields of the existing DCI format 0, and unlike the existing DCI format 0, the MCS field, the RV field, and the NDI field for the 2 nd TB are additionally included.

The existing 2 nd TB field is a field used to transmit the corresponding TB information when two TBs are transmitted at a time by spatial multiplexing. In the embodiment of the present invention, since two slot-based TBs are allowed in one DCI in the low-delay transmission, DCI format 0A is configured using the 2 nd TB field. The flag that distinguishes between DCI format 0 and DCI format 1A among DCI fields is used as a flag that distinguishes between DCI format 1F and DCI format OA. For example, if the corresponding flag is 0, it indicates that the DCI format for the low jitter allocation is DCI format 0A, and if the corresponding flag is 1, it indicates that the DCI format for the low jitter allocation is the DCI format 1A.

In this manner, DCI format 0A for the user interface blocking according to the embodiment of the present invention is configured using the existing DCI field to transmit uplink resource allocation and other information.

Next, a scheduling method according to an embodiment of the present invention will be described.

4 is a diagram illustrating a downlink and uplink transmission process.

In the downlink scheduling in the existing LTE-A system, as shown in FIG. 4A, downlink scheduling (DL assignment) is performed, DCI according to the scheduling is transmitted, DCI retransmission is performed in case of NACK, and new scheduling is performed in case of ACK. That is, the downlink scheduling includes transmission processes of DCI (DL allocation) - UCI (A / N information) - DCI (DL allocation). Here, UCI is ACK (acknowledgment) / NACK (negative ACK) information indicating the success or failure of DCI reception.

In the uplink scheduling, as shown in FIG. 4B, UL scheduling is performed according to a request from the UE, UL grant according to scheduling is transmitted, and uplink data is received from the UE, It then sends the UL grant or HI. That is, uplink scheduling is performed by transmission processes of DCI (UL grant) - UL data - DCI (UL grant or HI). Here, HI is ACK / NACK information for controlling retransmission of UL data.

To ensure sufficient processing time, each transmission procedure is processed at a slot-based 4 sTTI interval. That is, processing of each transmission process of DCI (DL allocation) - UCI (A / N information) - DCI (DL allocation) of downlink scheduling is performed at 4 sTTI intervals. Also, the processing of each transmission process of DCI (UL Grid) - UL Data - DCI (UL Grant or HI) of uplink scheduling is performed at 4 sTTI intervals.

However, in the embodiment of the present invention, the scheduling for two consecutive slots is performed using one DCI, so that the interval between transmission processes may become uneven.

5 is an exemplary diagram illustrating a scheduling process.

Here, the scheduling is performed based on the slot-based TTI, sTTI, and the scheduling is roughly schematized on the assumption that the scheduling unit is performed at intervals of 4s TTI.

5, ACK / NACK information of data received in the first slot s0 and the second slot s1 of the downlink subframe # 0 is allocated to the uplink subframe # 2 in the downlink, In the first slot s0 and the second slot s1. In this case, since the ACK / NACK information of the data received in the first slot s0 of the subframe # 0 is transmitted in the first slot s0 of the subframe # 2, the interval of 4sTTI, that is, n + 4 is maintained, In addition, since the ACK / NACK information of the data received in the second slot s1 of the subframe # 0 is transmitted in the second slot s1 of the subframe # 2, the interval of n + 4 is maintained, Do not.

However, when the next DCI information is received in the first slot (s0) of the downlink subframe # 4, the transmission interval of s1 is reduced to 3s TTI intervals. That is, the interval between the transmission in the first slot s0 of the uplink subframe # 2 and the reception of the next DCI in the first slot s0 of the subframe # 4 is maintained at n + 4, The interval between the transmission in the second slot s1 of the subframe # 2 and the reception of the next DCI in the first slot s0 of the subframe # 4 is n + 3, and the interval between the transmission processes is not constant .

Embodiments of the present invention provide two scheduling schemes.

First, the first scheduling method will be described.

The first scheduling scheme may be referred to as standalone scheduling.

In the downlink, in the embodiment of the present invention, the unit of scheduling is n + 6. That is, transmission processing is performed within the (n + 6) th slot of the TTI standard.

6 is a diagram illustrating a scheduling process according to a first example of the first embodiment of the present invention.

The downlink scheduling consists of DCI (DL allocation) - UCI (A / N information) - DCI (DL allocation) transmission processes. As shown in FIG. 6, DCI of subframe # TB of the slot s0 and TB of the second slot s1.

ACK / NACK for data received through the TB (Slot0_TB) of the first slot (s0) of the subframe # 0 and the TB (slot1_TB) of the second slot (s1) (s0) and the second slot (s1), respectively. The base station receiving the ACK / NACK (Slot0_AN) transmitted in the first slot (s0) of the subframe # 2 allocates the DCI to the subframe # 5 according to the scheduling unit n + 6. At this time, the interval between the transmission in the first slot s0 of the uplink subframe # 2 and the allocation of the DCI in the first slot s0 of the subframe # 5 is n + 6, The interval between the transmission in the second slot s1 and the allocation of the DCI in the first slot s0 of the subframe # 5 becomes n + 5. A new DCI allocated to subframe # 5 may indicate retransmission of TBs transmitted in subframe # 0.

In this manner, ACK / NACK of the TBs generated in the subframe #n can be scheduled to appear in the first slot s0 and the second slot s1 of the subframe # (n + 2) And retransmissions of the TBs are scheduled to appear in subframe # (n + 5).

7 is a diagram illustrating HARQ of downlink scheduling according to a first example of the first embodiment of the present invention.

As shown in FIG. 7, in the embodiment of the present invention, the HARQ of downlink scheduling has a multi-process structure. Here, the process number of the downlink HARQ is allocated from 0 to 4, and the number of processes of the downlink HARQ is 5.

In the uplink, in the embodiment of the present invention, the unit of scheduling is n + 6.

8 is a diagram illustrating a scheduling process according to a second example of the first embodiment of the present invention.

8, the DCI (UL grant) of the subframe # 0 is transmitted to the subframe # 0 through the subframe # 0, and the uplink scheduling is performed by the transmission processes of the DCI (UL grant) - UL data - DCI (UL grant or HI) TB of the first slot (s0) of # 2 and TB of the second slot (s1).

The terminal transmits the TB in the first slot (slot0) and the second slot (s1) of the subframe # 2. For retransmission control of the TB (Slot0_TB) transmitted in the first slot (slot0) of the subframe # 2, the base station transmits to the subframe # 5 corresponding to n + 6 from the first slot (slot0) of the subframe # 2 Assign DCI. For the retransmission control of the TB (Slot1_TB) transmitted in the second slot (slot1) of the subframe # 2, the base station transmits DCI (n) to the subframe # 5 corresponding to n + 5 from the second slot .

In this manner, scheduling is performed so that TB transmission can be indicated in the first slot (s0) and the second slot (s1) of the subframe # (n + 2) with respect to the DCI generated in the subframe #n, Scheduling is performed so that the DCI is allocated in the subframe # (n + 5) for the TB retransmission in the subframe # (n + 2) according to the generated DCI.

9 is a diagram illustrating HARQ of uplink scheduling according to a second example of the first embodiment of the present invention.

As shown in FIG. 9, in the embodiment of the present invention, HARQ of uplink scheduling has a multi-process structure. Here, the process number of the uplink HARQ is allocated from 0 to 4, and the number of processes of the uplink HARQ is 5.

Next, the second scheduling method will be described.

The second scheduling scheme may be referred to as twin scheduling.

In the downlink, the scheduling unit is set to n + 4 in the embodiment of the present invention, and the ACK / NACK transmitted in the second slot s1 is not considered when determining the subframe # 5 DCI. That is, by utilizing only the ACK / NACK information transmitted in the first slot s0 of the subframe # 2, the problem of reducing the transmission interval to 3s TTI can be solved. At this time, since the ACK / NACK transmitted through the second slot s1 of the subframe # 2 is not utilized in the next scheduling, it can be used to transmit information related to the channel quality such as low-delay specific CSI. That is, although the ACK / NACK transmitted through the second slot s1 of the subframe # 2 is not used as information to be considered when determining the next DCI, information to be considered for adjusting the channel quality by monitoring the channel condition of the UE .

10 is a diagram illustrating a scheduling process according to a first example of the second embodiment of the present invention.

The DCI (DL allocation) of the subframe # 0 indicates the TB of the first slot s0 and the TB of the second slot s1. ACK / NACK for data received through the TB (Slot0_TB) of the first slot (s0) of the downlink subframe # 0 and the TB (slot1_TB) of the second slot (s1) 1 slot s0. That is, the ACK / NACK is not separately transmitted to the data received through the TB (slot1_TB) of the second slot (s1) of the subframe # 0, and the base station transmits the first slot (s0) of the uplink subframe # ACK / NACK is checked on data transmitted through the TB (Slot0_TB) of the first slot (s0) of the downlink subframe # 0 and the TB (slot1_TB) of the second slot (s1) based on the ACK / .

The base station receiving the ACK / NACK Slot0_AN transmitted through the first slot s0 of the subframe # 2 corresponds to the slot n + 4 from the first slot (slot0) of the subframe # 2 in units of n + DCI is allocated to the first slot s0 of the subframe # 4.

The ACK / NACK of TB generated in the first slot s0 of the subframe #n is performed in the first slot (slot # 0) of the subframe # (n + 2) Scheduling is performed so that additional channel information can be transmitted to the second slot s1 of the mobile station UE. In addition, the retransmission of the TBs generated in the subframe #n can be performed in the subframe # (n + 4), and the information utilized at this time is the information received in the first slot s0 of the subframe # (n + Lt; / RTI >

11 is a diagram illustrating HARQ of downlink scheduling according to the first example of the second embodiment of the present invention.

As shown in FIG. 11, in the embodiment of the present invention, the HARQ of downlink scheduling has a multi-process structure. Here, the process numbers of the downlink HARQ are allocated from 0 to 3, and the number of processes of the downlink HARQ is 4.

In the uplink, in the embodiment of the present invention, the unit of scheduling is n + 4.

12 is a diagram illustrating a scheduling process according to a second example of the second embodiment of the present invention.

The DCI (UL grant) of the subframe # 0 indicates the TB of the first slot (s0) of the subframe # 2 and the TB of the second slot (s1). The UE transmits the TB in the first slot s0 and the second slot s1 of the uplink subframe # 2. For the retransmission control for the TB (Slot0_TB) transmitted through the first slot (s0) of the uplink subframe # 2, the base station sets the first slot (s0) of the subframe # 2 to the 4th TTI interval (UL grant or HI) to the first slot (s0) of the subframe # 4 corresponding to the slot # 0. In addition, for the retransmission control of the TB (Slot1_TB) transmitted through the second slot (s1) of the uplink subframe # 2, the base station allocates the DCI to the first slot (s0) of the subframe # 4.

ACK / NACK information for the first slot s0 of the uplink subframe # 2 is transmitted and ACK / NACK information for the second slot s1 of the subframe # 2 is transmitted through the first slot s0. As shown in FIG. That is, the ACK / NACK for the first slot s0 and the second slot s1 of the uplink subframe # 2 is performed through the first slot s0 of the subframe # 4.

13 is a diagram illustrating HARQ of uplink scheduling according to a second example of the second embodiment of the present invention.

As shown in FIG. 13, in the embodiment of the present invention, HARQ of uplink scheduling has a multi-process structure. Here, the process number of the uplink HARQ is allocated from 0 to 3, and the number of processes of the uplink HARQ is 4.

Next, a third embodiment of the present invention will be described.

In the third embodiment of the present invention, in order to secure transmission of the ACK / NACK information of each slot while regulating the transmission interval to 4 sTTI, an sTTI-based TTI scheduling in which a low delay slot based TTI scheduling and a normal delay slot based TTI scheduling are simultaneously performed And provides a dual tone scheduling scheme.

Here, the normal delay slot-based TTI scheduling means that the TB size is transmitted in the slot unit but the transmission interval is transmitted in the interval of the existing four subframes. That is, transmission and reception are performed in different transmission intervals for each slot in one subframe.

14 is a diagram illustrating a radio frame structure according to a third embodiment of the present invention.

In the sTTI-based dual tone scheduling, the first slot of the two slots constituting the subframe, i.e., the first slot operates with a low delay (transmission interval is 4 slots), and the second slot operates with a normal delay The transmission interval is 4 subframes).

In order to support this, as shown in FIG. 14, the first slot (slot # 0) of each subframe follows the sTTI radio frame configuration as described above, and accordingly, the first slot (slot # 0) (For example, LL-PDSCH in the downlink, LL-PUCCH in the uplink, and LL-PUSCH) are allocated. The second slot (slot # 1) of each subframe operates based on the slot-based TTI and operates with the normal delay, and follows the TTI scheme of the existing LTE. Therefore, in the second slot (slot # 1), an area (slot_PDSCH in the downlink, slot_PUSCH in the uplink) that operates on the normal delay scheduling basis based on the sTTI is allocated.

In the third embodiment of the present invention, the channel configurations of the first slot (slot # 0) and the second slot (slot # 1) are different in order to simultaneously schedule the low delay transmission and the normal delay transmission based on the sTTI, , The first slot (slot # 0) has LL-PDSCH. LL-PUSCH and LL-PUCCH are assigned to the second slot (slot # 1), and slot_PDSCH and slot_PUSCH are allocated to the second slot (slot # 1).

15 is a diagram illustrating a scheduling process according to a third embodiment of the present invention.

In a dual-tone scheduling-based wireless frame based on sTTI, two slots of scheduling information are transmitted in a control channel of a subframe. Unlike the above-described embodiment, the first slot, i.e., the first slot, That is, the second slot carries different DCIs for use as normal delays. Specifically, DCI (for convenience of description, may be referred to as low-delay DCI) for LL-PDSCH resource allocation information for downlink low-delay transmission in one control channel and slot_PDSCH resource allocation information (Which may be called a normal delay DCI for convenience of description) are respectively transmitted. In this manner, the DCI is divided and transmitted, so that different users can be served.

As illustrated in FIG. 15, DCI (D1, D1 ') for LL-PUSCH resource allocation information for uplink low-delay transmission to be transmitted in subframe # (n + 2) DCI (D2, D2 ') for slot_PUSCH resource allocation information for transmission are respectively transmitted. DCIs for slot-specific scheduling are separately transmitted to the control channel of one subframe, thereby controlling the sTTI-based low-delay link and the sTTI-based steady delay link, respectively.

Here, the DCI for downlink dual tone scheduling utilizes the DCI format 1E and the DCI format 1F, which are the above-described low-power consumption DCI formats. In the dual tone scheduling, the first slot (slot # 0) for low-delay DCI for normal delay for sending a 2 nd TB information as "null (NULL)", and the second slot (slot # 1) DCI is 1 st TB information is transmitted as "null " to distinguish low delay DCI from normal delay DCI.

The DCI for the uplink dual tone scheduling utilizes the DCI format 0A for the low persistence described above. In the dual tone scheduling, the first slot (slot # 0) the normal delay DCI for low latency, DCI 2 nd TB information for transmission, and the second slot (slot # 1) in "null" for are the 1 st TB information Quot; null "to distinguish low delay DCI from normal delay DCI.

16 is a diagram illustrating a scheduling process according to a first example of the third embodiment of the present invention.

Here, we perform sTTI-based downlink dual tone scheduling that transmits DCI for low delay and normal delay together.

The downlink scheduling consists of transmission processes of DCI (DL allocation) - UCI (A / N information) - DCI (DL allocation). As shown in FIG. 16, two downlink DCI (DL allocation) indicates the TB of the first slot s0 and the TB of the second slot s1.

ACK / NACK for data received through the TB (Slot0_TB) of the first slot (s0) of the subframe # 0 is performed in the first slot (s0) of the uplink subframe # 2 to realize low delay. At this time, ACK / NACK is transmitted within the TTI reference slot and n + 4.

ACK / NACK for data received through the TB (Slot1_TB) of the second slot (s0) of the subframe # 0 is performed in the second slot (s1) of the uplink subframe # 4, thereby realizing a normal delay. At this time, the TTI standard is a subframe, and ACK / NACK is transmitted within n + 4.

The base station receiving the ACK / NACK (Slot0_AN) transmitted in the first slot (s0) of the subframe # 2 allocates the DCI to the subframe # 4 corresponding to n + 4 on the slot basis. The base station receiving the ACK / NACK (slot1_AN) transmitted in the second slot s1 of the subframe # 4 allocates the DCI to the subframe # 8 corresponding to n + 4 based on the subframe. The new DCI allocated here may indicate retransmission of the TBs transmitted in subframe # 0.

DCIs generated in the subframe #n are divided into a low delay and a normal delay, and in the case of a low delay, an ACK / NACK appears in the first slot (s0) of the subframe # (n + 2) , Scheduling is performed so that ACK / NACK can be respectively present in the slot s1 of the subframe # (n + 4). In addition, in the case of a low delay, the retransmission is indicated in the subframe # (n + 4), and in the case of the normal delay, in the subframe # (n + 8) Scheduling is done so that it can be instructed.

17 is a diagram illustrating HARQ of downlink scheduling according to the first example of the third embodiment of the present invention.

In the embodiment of the present invention, as shown in Fig. 17, in the downlink scheduling based on the dual tone scheduling, the HARQ of the low delay transmission has a multi-process structure. Here, the process number of the downlink HARQ is allocated from 0 to 3, and the number of processes of the downlink HARQ is 4.

18 is a diagram illustrating a scheduling process according to a second example of the third embodiment of the present invention.

Here, we perform uplink dual tone scheduling based on sTTI that transmits DCI for low delay and normal delay together.

As shown in FIG. 18, the DCI (UL grant) of the subframe # 0 is transmitted to the subframe # 0 through the subframe # 0, and the uplink scheduling is performed by the transmission processes of DCI (UL grant) - UL data - DCI (UL grant or HI) TB of the first slot (s0) of # 2 and TB of the second slot (s1) of the subframe # 4.

The terminal transmits the TB in the first slot s0 of the subframe # 2 and the second slot s1 of the subframe # 4. By transmitting TB (Slot0_TB) in the first slot (s0) of subframe # 2 within slot reference n + 4 from the DCI allocation time point, low delay is realized. Further, a normal delay is realized by transmitting TB (Slot1_TB) in the second slot (s1) of the subframe # 4 within the subframe reference n + 4 from the DCI allocation time point.

For retransmission control of TB (Slot0_TB) for low-delay transmission, the base station allocates DCI to subframe # 4 corresponding to n + 4 on a slot basis. For retransmission control of TB (Slot1_TB) for normal delay transmission, the base station allocates DCI to subframe # 8 corresponding to n + 4 on a subframe basis.

DCIs generated in the subframe #n are divided into a low delay and a normal delay, and in the case of low delay, TB transmission occurs in the first slot (s0) of the subframe # (n + 2) Scheduling is performed so that TB transmissions can be respectively shown in the second slot s1 of the subframe # 4. The DCI generated in the subframe #n divides the TB transmission into the low delay and the normal delay. In the case of low delay, the retransmission for the TB of the first slot (s0) of the subframe # (n + 2) n + 4), and in case of normal delay, retransmission for the TB of the second slot (s1) of subframe # 4 is indicated in frame # (n + 8).

19 is a diagram illustrating HARQ of uplink scheduling according to a second example of the third embodiment of the present invention.

As shown in the attached FIG. 19, in the embodiment of the present invention, HARQ of uplink scheduling based on dual tone scheduling has a multi-process structure. Here, the process number of the uplink HARQ is allocated from 0 to 3, and the number of processes of the uplink HARQ is 4.

20 is a structural diagram of a scheduling apparatus according to an embodiment of the present invention.

20, a scheduling apparatus 100 according to an exemplary embodiment of the present invention includes a processor 110, a memory 120, and a radio frequency (RF) converter 130. As shown in FIG. The processor 110 may be configured to implement the methods described above based on Figures 2-19.

The memory 120 is coupled to the processor 110 and stores various information related to the operation of the processor 110. [ The RF converter 130 is connected to the processor 110 and transmits or receives radio signals.

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, a recording medium on which the program is recorded And such an embodiment can be easily 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)

In a scheduling method based on a wireless frame in which frames and frames supporting existing services coexist,
Performing scheduling based on a slot-based transmission time interval (TTI); And
Transmitting control information including resource allocation information according to the scheduling through a control channel of a subframe constituting the radio frame
Lt; / RTI >
Wherein the control information controls a first slot and a second slot constituting one subframe. The method of claim 1, wherein
A low delay data area is allocated in an area for downlink data transmission in each subframe of the radio frame, a low delay data area is allocated in an area for uplink data transmission, and a low delay data area is allocated to each subframe in the uplink. Wherein a control area for transmitting information is allocated. The method according to claim 2, wherein
In performing the scheduling,
ACK (acknowledgment) / NACK (negative ACK) for data transmitted in subframe #n (n is an integer) in the first slot and the second slot of subframe # (n + 2) Respectively,
After transmitting via the control channel,
And scheduling is performed such that retransmission of data transmitted in the subframe #n is performed in subframe # (n + 5)
The scheduling method further comprising: The method according to claim 2, wherein
In performing the scheduling,
In the uplink transmission, data transmission is performed in the first slot and the second slot of the subframe # (n + 2) respectively according to the control information transmitted in the subframe #n,
After transmitting via the control channel,
, Scheduling is performed so that new control information is allocated in subframe # (n + 5) for retransmission of data transmitted in the subframe # (n + 2)
The scheduling method further comprising: 4. The method according to claim 3 or 4, wherein
Performing Hybrid Automatic Repeat reQuest (HARQ) in a multi-process structure
Further comprising:
Wherein the HARQ process number is allocated from 0 to 4, and the number of HARQ processes is 5. 3. The method of claim 2,
In performing the scheduling,
In downlink transmission, scheduling is performed so that ACK / NACK for data transmitted through the first slot of subframe #n is transmitted in the first slot of subframe # (n + 2)
After transmitting via the control channel,
And scheduling is performed such that retransmission of the data transmitted in the subframe #n is performed in the subframe # (n + 4)
Further comprising:
Wherein the scheduling in the subframe # (n + 4) is performed based on channel information transmitted in the second slot of the subframe # (n + 2). 3. The method of claim 2,
In performing the scheduling,
In the uplink transmission, scheduling is performed such that data transmission is performed in the first slot and the second slot of the subframe # (n + 2), respectively, according to the control information transmitted in the subframe #n,
After transmitting via the control channel,
ACK / NACK information for data transmitted in the first slot and the second slot of the subframe # (n + 2) is transmitted through the first slot of the subframe # (n + 4); And
And scheduling is performed so that new control information is allocated in subframe # (n + 4) for retransmission of data transmitted in the subframe # (n + 2)
The scheduling method further comprising: The method according to claim 6 or 7, wherein
Performing Hybrid Automatic Repeat reQuest (HARQ) in a multi-process structure
Further comprising:
Wherein the HARQ process number is allocated from 0 to 3, and the number of HARQ processes is 4. The method according to claim 1,
A first low-delay data area is allocated to an area for data transmission in a first slot, a second low-delay data area is allocated to an area for data transmission in the second slot, Wherein the first slot operates at a first transmission interval and the second slot operates at a second transmission interval, the first transmission interval is a slot-based transmission interval, the second transmission interval is a subframe-based transmission / RTI > 10. The method of claim 9,
Wherein the step of transmitting through the control channel comprises: first control information including resource allocation information for a low-delay transmission through a first slot of the first transmission interval; And transmitting second control information including resource allocation information for delayed transmission,
/ RTI > 11. The method of claim 10,
In performing the scheduling,
In downlink transmission, an ACK / NACK for data transmitted according to the first control information in the first slot of subframe #n is transmitted in the first slot of subframe # (n + 2), and the subframe # n is scheduled to be transmitted in the first slot of the subframe # (n + 4), wherein ACK / NACK for data to be transmitted in the second control information in the second slot of the subframe # n is transmitted in the first slot of the subframe # (n + 4). 12. The method of claim 11,
After transmitting via the control channel,
(N + 4) in the first slot of the subframe #n and retransmission of data transmitted in accordance with the first control information is indicated in the subframe # And scheduling is performed such that retransmission of data transmitted according to the information is indicated in sub-frame # (n + 8)
The scheduling method further comprising: 11. The method of claim 10,
In performing the scheduling,
In the uplink transmission, data transmission is performed in the first slot of the subframe # (n + 2) according to the first control information of the subframe #n, and in accordance with the second control information of the subframe #n, And scheduling is performed such that data transmission is performed in a second slot of # 4. 13. The method of claim 12,
After transmitting via the control channel,
The retransmission of the data transmitted in the first slot of the subframe # (n + 2) is indicated in the subframe # (n + 4) and the retransmission of the data transmitted in the second slot of the subframe # And scheduling is performed so as to be indicated in sub-frame # (n + 8)
The scheduling method further comprising: The method according to claim 1,
The control information
Information for data transmitted through the first slot and information for data transmitted through the second slot,
Wherein the downlink control information is configured based on a format of one of the low-delay DCI format 1F and the DCI format 1E, and the uplink control information is configured based on the low-delay DCI format 0A format. In a scheduling apparatus based on a radio frame in which a low delay frame and a frame supporting an existing service coexist,
A radio frequency converter for transmitting and receiving signals through an antenna, and
A processor coupled to the radio frequency translator and performing scheduling,
The processor comprising:
Wherein the scheduler performs scheduling based on a slot-based TTI and controls the radio frequency converter to transmit control information including resource allocation information according to the scheduling through a control channel of a subframe constituting the radio frame,
Wherein the control information controls a first slot and a second slot constituting one subframe. The method of claim 16, wherein
The processor comprising:
ACK / NACK for data transmitted in the subframe #n (n is an integer) is transmitted in the first slot and the second slot of the subframe # (n + 2) respectively in the downlink transmission process, performs scheduling so that retransmission of data transmitted from #n is performed in sub-frame # (n + 5)
In the uplink transmission process, data transmission is performed in the first slot and the second slot of the subframe # (n + 2), respectively, according to the control information transmitted in the subframe #n, (N + 5) to allocate new control information for retransmission of data transmitted in the subframe # (n + 5). 17. The method of claim 16,
The processor comprising:
ACK / NACK for data transmitted through the first slot of the subframe #n is transmitted in the first slot of the subframe # (n + 2) in the downlink transmission process, and data transmitted in the subframe #n (N + 4) in the subframe # (n + 4)
In the uplink transmission process, data transmission is performed in the first slot and the second slot of the subframe # (n + 2), respectively, according to the control information transmitted in the subframe #n, (N + 4) to allocate new control information for retransmission of data transmitted in the subframe # (n + 4). 17. The method of claim 16,
Wherein in each subframe of the radio frame the first slot operates at a first transmission interval and the second slot operates at a second transmission interval, the first transmission interval is a slot-based transmission interval, If the transmission interval is a subframe-based transmission interval,
Wherein the processor is configured to transmit first control information including resource allocation information for low delay transmission through a first slot of the first transmission interval and resource allocation information for normal delay transmission through a second slot of the second transmission interval, And second control information including the second control information. 20. The method of claim 19,
The processor comprising:
ACK / NACK for data transmitted according to the first control information in the first slot of the subframe #n is transmitted in the first slot of the subframe # (n + 2) in the downlink transmission process, performs scheduling so that an ACK / NACK for data to be transmitted to the second control information in a second slot of #n is transmitted in a first slot of subframe # (n + 4)
In the uplink transmission process, data is transmitted in the first slot of the subframe # (n + 2) according to the first control information of the subframe #n, and data is transmitted in the subframe # And performs scheduling so that data transmission is performed in a second slot of frame # 4.
KR1020160022148A 2016-02-24 2016-02-24 Method and apparatus for scheduling for access link according to slot based TTI KR20170100110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160022148A KR20170100110A (en) 2016-02-24 2016-02-24 Method and apparatus for scheduling for access link according to slot based TTI

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160022148A KR20170100110A (en) 2016-02-24 2016-02-24 Method and apparatus for scheduling for access link according to slot based TTI

Publications (1)

Publication Number Publication Date
KR20170100110A true KR20170100110A (en) 2017-09-04

Family

ID=59924276

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160022148A KR20170100110A (en) 2016-02-24 2016-02-24 Method and apparatus for scheduling for access link according to slot based TTI

Country Status (1)

Country Link
KR (1) KR20170100110A (en)

Similar Documents

Publication Publication Date Title
EP3902343B1 (en) Method and apparatus of handling time gap for sidelink hybrid automatic request (harq) in network scheduling mode in a wireless communication system
US10798705B2 (en) Method and apparatus for operating subframe and transmitting channel information for controlling interference in communication system
KR102532032B1 (en) Method and apparatus for handling device-to-device feedback transmission in a wireless communication system
JP7256865B2 (en) HARQ for Sidelinks in In-Coverage and Out-of-Coverage Scenarios
JP6388768B2 (en) User terminal, radio base station, and radio communication method
US10333654B2 (en) Method for supporting HARQ in communication system using unlicensed frequency band and device having applied same
JP6932928B2 (en) Wireless communication device, wireless communication method and computer program
KR101577455B1 (en) Method of relaying data
KR101820742B1 (en) Mobile communication system and method for transmitting data thereof
WO2017134943A1 (en) Terminal device, base station device, and communication method
KR102586632B1 (en) Method and apparatus for performing harq in nr v2x system
WO2017134954A1 (en) Terminal device, base station device, and communications method
CN105934992B (en) User terminal, radio base station, and radio communication method
CN105453684B (en) Method and apparatus for requesting scheduling in a cellular mobile communication system
EP3603256B1 (en) Network node and method in a wireless communications network
KR20140034285A (en) Scheduling request enabled uplink transmission
KR102638922B1 (en) Method and apparatus for transmission and reception of multiple timing transmission schemes in wirelss cellular communication system
US20220225400A1 (en) Communications device, infrastructure equipment and methods
CN102573074B (en) Method, system and apparatus for semi-persistent scheduling on backhaul link, and receiving method and apparatus thereof
JP6224743B2 (en) Relay method and node in wireless communication system
JP2021192466A (en) Radio communication apparatus, radio communication method, and computer program
CN112970316A (en) Method and apparatus for determining transmission resources of uplink channel for dual connectivity in wireless communication system
KR20170100110A (en) Method and apparatus for scheduling for access link according to slot based TTI
KR20150012805A (en) Method and apparatus for managing soft buffer for device-to-device communication in wireless communication system