Method of communication using frame

• US 8,223,857 B2
• Filed: 02/17/2009
• Issued: 07/17/2012
• 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, Noh, Minseok, Kwon, Yeong Hyeon, Kwak, Jin Sam, Kim, Dong Cheol, Han, Seung Hee, Lee, Hyun Woo
• Primary Examiner(s): Vo, Don N
• Application Number:
  US12/372,507
• Publication Number:
  US 20090225881A1
• Time in Patent Office: 1,246 Days
• Field of Search: 375/260, 370/280, 370/294, 370/314, 370/321, 370/474, 370/476
• US Class Current: 375/260
• 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. One of the second subframes includes an idle symbol.

Claims

1. A method of communicating by a mobile communication terminal in communication with a base station, comprising:

transceiving data in a unit of a frame in which five (5) subframes for downlink which are followed by three (3) subframes for uplink are included, the frame including

a plurality of first type subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and

a plurality of second type subframes each having a second number of OFDMA symbols different from the first number,

wherein one (1) first type subframe for downlink is followed by three (3) second type subframes for downlink, and two (2) second type subframes for uplink are followed by one (1) first type subframe for uplink, which is a last subframe of the frame, and

wherein an idle symbol is included between the five (5) subframes for downlink and the three (3) subframes for uplink.

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

3. The method of claim 1, wherein a number of the plurality of first type subframes and a number of the plurality of second type subframes 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 last subframe of the frame includes an additional idle symbol for a receive/transmit transition gap (RTG).

6. A mobile communication terminal configured to communicate with a base station, comprising:

a transceiver; and

a processor operatively connected to the transceiver, the processor configured to transceive data in a unit of a frame in which five (5) subframes for downlink which are followed by three (3) subframes for uplink are included, the frame including

a plurality of first type subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and

a plurality of second type subframes each having a second number of OFDMA symbols different from the first number,

wherein one (1) first type subframe for downlink is followed by three (3) second type subframes for downlink, and two (2) second type subframes for uplink are followed by one (1) first type subframe for uplink, which is a last subframe of the frame, and

wherein an idle symbol is included between the five (5) subframes for downlink and the three (3) subframes for uplink.

7. The terminal of claim 6, wherein a number of the plurality of first type subframes and a number of the plurality of second type subframes are predetermined.

8. The terminal of claim 6, wherein a number of the plurality of first type subframes and a number of the plurality of second type subframes are determined based upon an instruction received from the base station.

9. The terminal of claim 6, wherein the frame has a cyclic prefix (CP) length of 1/16 useful symbol time (Tu).

10. The terminal of claim 6, wherein the last subframe of the frame includes an additional idle symbol for a receive/transmit transition gap (RTG).