Method of communication using frame

• US 8,837,518 B2
• Filed: 10/04/2011
• Issued: 09/16/2014
• Est. Priority Date: 02/17/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Moon, Sungho, Noh, Minseok, Kwon, Yeong Hyeon, Kwak, Jin Sam, Kim, Dong Cheol, Han, Seung Hee, Lee, Hyun Woo
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): LOO, JUVENA W
• Application Number:
  US13/252,686
• Publication Number:
  US 20120026920A1
• Time in Patent Office: 1,078 Days
• Field of Search: 370310-349, 370/431, 370478-498, 370464-468
• 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 network, types of the plurality of downlink subframes including a first downlink type and a second downlink type, the plurality of downlink subframes of the frame including one (1) first downlink type subframe which is followed by three (3) second downlink type subframes; and

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

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

wherein the plurality of downlink subframes precedes the plurality of uplink subframes in each frame, and a last OFDMA symbol of a last downlink subframe in each frame is an idle symbol.

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

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

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 1, wherein the frame is a time division duplex (TDD) frame.

7. 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 to;

receive the plurality of downlink subframes of the frame from a network, types of the plurality of downlink subframes including a first downlink type and a second downlink type, the plurality of downlink subframes of the frame including one (1) first downlink type subframe which is followed by three (3) second downlink type subframes; and

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

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

wherein the plurality of downlink subframes precedes the plurality of uplink subframes in each frame, and a last OFDMA symbol of a last downlink subframe in each frame is an idle symbol.

8. The mobile communication terminal of claim 7, wherein a number of subframes of the first uplink type, the first downlink type, the second uplink type and the second downlink type are predetermined.

9. The mobile communication terminal of claim 7, wherein a number of subframes of the first uplink type, the first downlink type, the second uplink type and the second downlink type are determined based upon an instruction received from the network.

10. The mobile communication terminal of claim 7, wherein the frame has a cyclic prefix (CP) length of 1/16 useful symbol time (Tu).

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

12. The mobile communication terminal of claim 7, wherein the frame is a time division duplex (TDD) frame.