METHOD FOR TRANSMITTING AND RECEIVING SIGNAL FOR LOW LATENCY IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

• US 20160380732A1
• Filed: 02/26/2015
• Published: 12/29/2016
• Est. Priority Date: 03/13/2014
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: CHUNG, Jaehoon, HAHN, Genebeck, LEE, Eunjong, KIM, Jinmin, CHOI, Kukheon, NOH, Kwangseok
• Application Number:
  US15/039,006
• Publication Number:
  US 20160380732A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04J 11/0079 Acquisition of downlink reference signals, e.g. detection of cell-ID
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A method for a terminal receiving a downlink signal for low transmission latency in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving a downlink control channel from a base station; and receiving a downlink data channel based on control information transmitted from the downlink control channel. Here, the downlink data channel is transmitted in at least one advanced subframe comprising M number of orthogonal frequency division multiplexing (OFDM) symbols, and the downlink control channel is transmitted in at least one special symbol which is separate from the advanced subframe.

Claims

1. A method for receiving a downlink signal by a user equipment for low transmission latency in a wireless communication system, the method comprising the steps of:

receiving control information through a downlink control channel from a base station; and

receiving downlink data through a downlink data channel based on the control information transmitted through the downlink control channel,

wherein downlink data is transmitted through the downlink data channel in at least one advanced subframe that includes N number of orthogonal frequency division multiplexing (OFDM) symbols, wherein N being smaller than or equal to 3, wherein the control information is transmitted through the downlink control channel in at least one special symbol.

2. The method according to claim 1, wherein the control information transmitted through the downlink control channel includes configuration information of the at least one advanced subframe.

3. The method according to claim 1, wherein a sum of a transmission slot of the at least one advanced subframe and a special symbol transmission slot including the at least one special symbol corresponds to a transmission slot of a legacy subframe that includes L number of OFDM symbols.

4. The method according to claim 1, wherein N is 3.

5. The method according to claim 3, wherein another special symbol except the at least one special symbol from the special symbols is used to transmit at least one of a downlink synchronization signal, a downlink channel measurement pilot, a downlink ACK/NACK signal for uplink data transmission, or a downlink massive MIMO beam scanning signal, or is used for measurement of an interference signal.

6. The method according to claim 3, wherein each of first and second special symbols of the at least one special symbols includes control information of a downlink data channel transmitted in its subsequent advanced subframe.

7. The method according to claim 6, wherein the first special symbol includes control information of a downlink control channel transmitted in the second special symbol.

8. The method according to claim 7, wherein the control information of a downlink control channel transmitted in the second special symbol includes a frequency band of the downlink control channel transmitted in the second special symbol.

9. The method according to claim 7, wherein the subsequent advanced subframes are at least 2 advanced subframes.

10. The method according to claim 5, wherein the special symbols have a position varied depending on their purpose of use.

11. A method for transmitting a downlink signal for low transmission latency by a base station in a wireless communication system, the method comprising the steps of:

transmitting control information for a downlink data channel through a downlink control channel to a user equipment; and

transmitting downlink data through the downlink data channel, wherein the downlink data is transmitted through a downlink data channel in at least one advanced subframe that includes N number of orthogonal frequency division multiplexing (OFDM) symbols, wherein N being smaller than or equal to 3, wherein the control information is transmitted through the downlink control channel in at least one special symbol.

12. A user equipment for receiving a downlink signal for low transmission latency in a wireless communication system, the user equipment comprising:

a transmission and reception module transmitting and receiving a signal; and

a processor controlling the transmission and reception module to receive control information for a downlink data channel through a downlink control channel and receive downlink data through the downlink data channel based on the control information transmitted from the downlink control channel, wherein the downlink data is transmitted through the downlink data channel in at least one advanced subframe that includes N number of orthogonal frequency division multiplexing (OFDM) symbols, wherein N being smaller than or equal to 3, and the control information is transmitted through the downlink control channel in at least one special symbol.

13. A base station for transmitting a downlink signal for low transmission latency in a wireless communication system, the base station comprising:

a transmission and reception module transmitting and receiving a signal; and

a processor controlling the transmission and reception module to transmit control information of a downlink data channel through a downlink control channel to a user equipment and transmit the downlink data through the downlink data channel, wherein the downlink data is transmitted through the downlink data channel in at least one advanced subframe that includes N number of orthogonal frequency division multiplexing (OFDM) symbols, wherein N being smaller than or equal to 3, wherein the control information is transmitted through the downlink control channel in at least one special symbol.