Communication method in wireless communication system on basis of carrier aggregation

• US 9,986,557 B2
• Filed: 07/15/2014
• Issued: 05/29/2018
• Est. Priority Date: 07/16/2013
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Moon, Sung Hyun, Ko, Young Jo, Ahn, Jae Young, Kim, Cheul Soon, Shin, Joon Woo
• Primary Examiner(s): Cho, Hong
• Application Number:
  US14/905,407
• Publication Number:
  US 20160157226A1
• Time in Patent Office: 1,414 Days
• Field of Search: None
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04J 1/08 Arrangements for combining channels branching filters H01P1/213, H03H7/46
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 5/1469 using time-sharing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

Disclosed is a communication method in a wireless communication system on the basis of a carrier aggregation. The communication method on the basis of a carrier aggregation comprises the steps of: receiving a PDSCH from a base station via a subframe n of a TDD cell; and transmitting, to the base station, a PUCCH including a response to the PDSCH via a subframe n+4 of an FDD cell. Accordingly, an HARQ process may be performed efficiently.

Claims

1. A communication method in a system in which a Frequency Division Duplexing (FDD) cell and a Time Division Duplexing (TDD) cell are aggregated, the method comprising:

receiving a grant for uplink data channel transmission of the FDD cell through a (n−

k−

l)-th downlink subframe or special subframe of the TDD cell, wherein n is an integer number equal to or larger than 0 and k and l are natural numbers;

transmitting an uplink data channel based on the grant for uplink data channel transmission through a (n−

k)-th uplink subframe of the FDD cell; and

receiving an ACK or NACK for the uplink data channel through a n-th subframe of the TDD cell,

wherein n is a subframe index value indicating a position of a subframe in a frame of the TDD cell, and is one of 0 to 9,

wherein l is 4 according to a timing scheme of the FDD cell, and k is 6 for uplink/downlink configurations of the TDD cell, in order to guarantee the n-th subframe indicated by n to be a downlink subframe or a special subframe of the TDD cell and to guarantee a same HARQ round-trip time, regardless of a uplink/downlink configuration of the TDD cell.

2. The communication method of claim 1, wherein the FDD cell is cross-carrier-scheduled by the TDD cell.

3. A communication method in a system in which a Frequency Division Duplexing (FDD) cell and a Time Division Duplexing (TDD) cell are aggregated, the method comprising:

transmitting a grant for uplink data channel transmission of the FDD cell through a (n−

k−

l)-th downlink subframe or special subframe of the TDD cell, wherein n is an integer number equal to or larger than 0 and k and l are natural numbers;

receiving an uplink data channel based on the grant for uplink data channel transmission through a (n−

k)-th uplink subframe of the FDD cell; and

transmitting an ACK or NACK for the uplink data channel through a n-th subframe of the TDD cell,

wherein n is a subframe index value indicating a position of a subframe in a frame of the TDD cell, and is one of 0 to 9,

wherein l is 4 according to a timing scheme of the FDD cell, and k is 6 for uplink/downlink configurations of the TDD cell, in order to guarantee the n-th subframe indicated by n to be a downlink subframe or a special subframe of the TDD cell and to guarantee a same HARQ round-trip time, regardless of a uplink/downlink configuration of the TDD cell.

4. A communication method in a system in which a Frequency Division Duplexing (FDD) cell and a Time Division Duplexing (TDD) cell are aggregated, the method comprising:

receiving a NACK for an uplink data channel transmission of the FDD cell through a (n−

k−

l)-th downlink subframe or special subframe of the TDD cell, wherein n is an integer number equal to or larger than 0 and k and l are natural numbers;

transmitting an uplink data channel based on the NACK through a (n−

k)-th uplink subframe of the FDD cell; and

receiving an ACK or NACK for the uplink data channel through a n-th subframe of the TDD cell,

wherein n is a subframe index value indicating a position of a subframe in a frame of the TDD cell, and is one of 0 to 9,

wherein l is 4 according to a timing scheme of the FDD cell, and k is 6 for uplink/downlink configurations of the TDD cell, in order to guarantee the n-th subframe indicated by n to be a downlink subframe or a special subframe of the TDD cell and to guarantee a same HARQ round-trip time, regardless of a uplink/downlink configuration of the TDD cell.

5. The communication method of claim 4, wherein the FDD cell is cross-carrier-scheduled by the TDD cell.

6. A communication method in a system in which a Frequency Division Duplexing (FDD) cell and a Time Division Duplexing (TDD) cell are aggregated, the method comprising:

transmitting a NACK for an uplink data channel transmission of the FDD cell through a (n−

k−

l)-th downlink subframe or special subframe of the TDD cell, wherein n is an integer number equal to or larger than 0 and k and l are natural numbers;

receiving an uplink data channel based on the NACK through a (n−

k)-th uplink subframe of the FDD cell; and

transmitting an ACK or NACK for the uplink data channel through a n-th subframe of the TDD cell,

wherein n is a subframe index value indicating a position of a subframe in a frame of the TDD cell, and is one of 0 to 9,

wherein l is 4 according to a timing scheme of the FDD cell, and k is 6 for uplink/downlink configurations of the TDD cell, in order to guarantee the n-th subframe indicated by n to be a downlink subframe or a special subframe of the TDD cell and to guarantee a same HARQ round-trip time, regardless of a uplink/downlink configuration of the TDD cell.

7. A communication method in a system in which a Frequency Division Duplexing (FDD) cell and a Time Division Duplexing (TDD) cell are aggregated, the method comprising:

receiving a grant for uplink data channel transmission of the TDD cell through a n-th downlink subframe of the FDD cell, wherein n is an integer number equal to or larger than 0;

transmitting an uplink data channel based on the grant for uplink data channel transmission through a (n+k)-th uplink subframe of the TDD cell, wherein k is a natural number; and

receiving an ACK or NACK for the uplink data channel through a (n+k+l)-th downlink subframe of the FDD cell, wherein l is a natural number,

wherein n is a subframe index value indicating a position of a subframe in a frame of the TDD cell, and is one of 0 to 9,

wherein k is determined according to a subframe index value of the n-th subframe and an uplink-downlink configuration of the TDD cell based on a following table

8. The communication method of claim 7, wherein the TDD cell is cross-carrier-scheduled by the FDD cell.

9. The communication method of claim 7, wherein l is determined according to a subframe index value of the (n+k)-th subframe and an uplink-downlink configuration of the TDD cell based on a following table

10. A communication method in a system in which a Frequency Division Duplexing (FDD) cell and a Time Division Duplexing (TDD) cell are aggregated, the method comprising:

transmitting a grant for uplink data channel transmission of the TDD cell through a n-th downlink subframe of the FDD cell, wherein n is an integer number equal to or larger than 0;

receiving an uplink data channel based on the grant for uplink data channel transmission through a (n+k)-th uplink subframe of the TDD cell, wherein k is a natural number; and

transmitting an ACK or NACK for the uplink data channel through a (n+k+l)-th downlink subframe of the FDD cell, wherein l is a natural number,

wherein n is a subframe index value indicating a position of a subframe in a frame of the TDD cell, and is one of 0 to 9,

wherein k is determined according to a subframe index value of the n-th subframe and an uplink-downlink configuration of the TDD cell based on a following table