Signal-transceiving method, and apparatus therefor

• US 9,510,365 B2
• Filed: 04/26/2013
• Issued: 11/29/2016
• Est. Priority Date: 04/26/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yang, Suckchel, Ahn, Joonkui, Seo, Dongyoun
• Primary Examiner(s): Mohebbi, Kouroush
• Application Number:
  US14/390,635
• Publication Number:
  US 20150078222A1
• Time in Patent Office: 1,313 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/1268 of uplink data flows
• 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 72/535 based on resource usage policies

Abstract

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a time division duplex (TDD)-based wireless communication system. The method comprises the steps of receiving scheduling information for data transmission in a first uplink subframe, and transmitting uplink data based on the scheduling information. The uplink data transmission period includes the first uplink subframe, and further includes, if the second subframe immediately before the first uplink subframe is a subframe including a downlink period, a guard period and an uplink period, and if a predetermined condition is satisfied, an uplink period of a second subframe.

Claims

1. A method for transmitting an uplink signal by a user equipment in a time division duplex (TDD)-based wireless communication system, the method comprising:

receiving scheduling information for data transmission in a first uplink subframe; and

transmitting uplink data in accordance with the scheduling information,

wherein a transmission period for the uplink data includes the first uplink subframe,

wherein when a second subframe just before the first uplink subframe is a subframe including a downlink period, a guard period and an uplink period, and when a predetermined condition is satisfied, the transmission period further includes the uplink period of the second subframe, and a size of the uplink data is determined using second information about the number of resource blocks obtained by multiplying a specific weighting factor by first information about the number of resource blocks included in the scheduling information, and

wherein the second information about the number of resource blocks is determined by N_PRB=max{└

N′

_PRB×

(N_s+N_u)/N_s┘

,1}, where N′

_PRB corresponds to the first information about the number of resource blocks, N_PRB corresponds to the second information about the number of resource blocks, N_s represents the number of symbols allocated for transmission of the uplink data, and N_u represents the number of symbols at which the uplink data can be transmitted at the uplink period of the second subframe.

2. The method according to claim 1, wherein the predetermined condition includes that the scheduling information includes a specific indicator or a specific field of the scheduling information has a predetermined value.

3. The method according to claim 1, further comprising:

receiving control information through radio resource control (RRC) layer signaling,

wherein the predetermined condition includes that the control information includes a specific indicator.

4. The method according to claim 1, wherein the predetermined condition includes that an uplink reference signal is not configured to be transmitted through at least part of the uplink period of the second subframe.

5. The method according to claim 1, wherein the predetermined condition includes that an interval between a subframe at which the scheduling information is received and the uplink subframe is greater than a specific number of subframes.

6. A user equipment configured to transmit an uplink signal in a time division duplex (TDD)-based wireless communication system, the user equipment comprising:

a radio frequency (RF) module; and

a processor, wherein the processor is configured to;

receive scheduling information for data transmission in a first uplink subframe, and

transmit uplink data in accordance with the scheduling information,

wherein a transmission period for the uplink data includes the first uplink subframe,

wherein when a second subframe just before the first uplink subframe is a subframe including a downlink period, a guard period and an uplink period, and when a predetermined condition is satisfied, the transmission period further includes the uplink period of the second subframe, and a size of the uplink data is determined using second information about the number of resource blocks obtained by multiplying a specific weighting factor by first information about the number of resource blocks included in the scheduling information, and

wherein the second information about the number of resource blocks is determined by N_PRB=max{└

N′

_PRB×

(N_s+N_u)/N_s┘

,1}, where N′

_PRB corresponds to the first information about the number of resource blocks, N_PRB corresponds to the second information about the number of resource blocks, N_s represents the number of symbols allocated for transmission of the uplink data, and N_u represents the number of symbols at which the uplink data can be transmitted at the uplink period of the second subframe.

7. The user equipment according to claim 6, wherein the predetermined condition includes that the scheduling information includes a specific indicator or a specific field of the scheduling information has a predetermined value.

8. The user equipment according to claim 6, wherein the processor is further configured to receive control information through radio resource control (RRC) layer signaling, and the predetermined condition includes that the control information includes a specific indicator.

9. The user equipment according to claim 6, wherein the predetermined condition includes that an uplink reference signal is not configured to be transmitted through at least part of the uplink period of the second subframe.

10. The user equipment according to claim 6, wherein the predetermined condition includes that an interval between a subframe at which the scheduling information is received and the uplink subframe is greater than a specific number of subframes.