Method of communication using frame

• US 8,059,676 B2
• Filed: 02/17/2009
• Issued: 11/15/2011
• Est. Priority Date: 02/17/2008
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Moon, Sungho, Kim, Dong Cheol, Kwak, Jin Sam, Han, Seung Hee, Kwon, Yeong Hyeon, Noh, Minseok, Lee, Hyun Woo
• Primary Examiner(s): Yao; Kwang B
• Assistant Examiner(s): Loo; Juvena
• Application Number:
  US12/372,563
• Publication Number:
  US 20090219842A1
• Time in Patent Office: 1,001 Days
• Field of Search: 370/260, 370/478, 370/464, 370/479
• US Class Current: 370/464
• 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 5/1469 using time-sharing

Abstract

A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.

Claims

1. A method of communicating by a mobile communication terminal using a frame comprising a plurality of downlink subframes and a plurality of uplink subframes, the method comprising:

receiving the plurality of downlink subframes of the frame from a base station, types of the plurality of downlink subframes being divided into at least two types including a first type and a second type, the plurality of downlink subframes of the frame including a first type subframe which is followed by three (3) second type subframes; and

transmitting the plurality of uplink subframes of the frame to the base station, types of the plurality of uplink subframes including the first type and the second type, the plurality of uplink subframes of the frame including two (2) second type subframes which are followed by a last subframe of the frame, a type of the last subframe of the frame being the first type,

wherein each subframe of the first type includes a first number of orthogonal frequency division multiple access (OFDMA) symbols and each subframe of the second type includes a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number.

2. The method of claim 1, wherein a number of subframes of the first type and a number of subframes of the second type are predetermined.

3. The method of claim 1, wherein a number of subframes of the first type and a number of subframes of the second type are determined based upon an instruction received from the base station.

4. The method of claim 1, wherein the frame has a cyclic prefix (CP) length of 1/16 useful symbol time (Tu).

5. The method of claim 1, wherein the first number of OFDMA symbols is seven (7) symbols and the second number of OFDMA symbols is six (6) symbols.

6. The method of claim 5, wherein the frame is a time division duplex (TDD) frame.

7. The method of claim 1, wherein one of the subframes of the second type includes an idle symbol.

8. The method of claim 1, wherein a sixth symbol in a last subframe of the plurality of downlink subframes includes an idle symbol.

9. A mobile communication terminal using a frame comprising a plurality of downlink subframes and a plurality of uplink subframes, the mobile communication terminal comprising:

a transceiver configured for;

receiving the plurality of downlink subframes of the frame from a base station, types of the plurality of downlink subframes being divided into at least two types including a first type and a second type, the plurality of downlink subframes of the frame including a first type subframe which is followed by three (3) second type subframes; and

transmitting the plurality of uplink subframes of the frame to the base station, types of the plurality of uplink subframes including the first type and the second type, the plurality of uplink subframes of the frame including two (2) second type subframes which are followed by a last subframe of the frame, a type of the last subframe of the frame being the first type,

wherein each subframe of the first type includes a first number of orthogonal frequency division multiple access (OFDMA) symbols and each subframe of the second type includes a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number.

10. The mobile communication terminal of claim 9, wherein a number of subframes of the first type and a number of subframes of the second type are predetermined.

11. The mobile communication terminal of claim 9, wherein a number of subframes of the first type and a number of subframes of the second type are determined based upon an instruction received from the base station.

12. The mobile communication terminal of claim 9, wherein the frame has a cyclic prefix (CP) length of 1/16 useful symbol time (Tu).

13. The mobile communication terminal of claim 9, wherein the first number of OFDMA symbols is seven (7) symbols and the second number of OFDMA symbols is six (6) symbols.

14. The mobile communication terminal of claim 13, wherein the frame is a time division duplex (TDD) frame.

15. The mobile communication terminal of claim 9, wherein one of the subframes of the second type includes an idle symbol.

16. The mobile communication terminal of claim 9, wherein a sixth symbol in a last subframe of the plurality of downlink subframes includes an idle symbol.