Method for transmitting channel quality indicator

• US 8,638,705 B2
• Filed: 08/20/2010
• Issued: 01/28/2014
• Est. Priority Date: 08/21/2009
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Giwon, Ryu, Kiseon, Yuk, Youngsoo, Kim, Yongho, Chun, Jinyoung
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): YEUNG, MANG HANG
• Application Number:
  US13/380,787
• Publication Number:
  US 20120134331A1
• Time in Patent Office: 1,257 Days
• Field of Search: 370/311, 370/329, 370/341, 4553431-3436, 455450-464, 455/509, 455/574, 340 732- 738, 713300-322
• US Class Current: 370/311
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00

Abstract

Disclosed is a method for transmitting channel quality indicator (CQI) during a sleep mode operation. The method for transmitting CQI includes: receiving a message including a CQI-related parameter indicating a transmission of a CQI before a listening window; transmitting a CQI during a sleep window before the listening window according to a CQI-related parameter in the message; transitioning to the listening window according to a listening window-related parameter after transmitting the CQI; and waiting for receiving a message indicating whether or not there is data or traffic transferred from the base station during the listening window.

Claims

1. A method for transmitting channel quality indicators (CQIs) by a terminal during a sleep mode operation, the method comprising:

transmitting a sleep mode request message to a base station to request to enter into a sleep mode which comprises a sleep window and a listening window;

receiving a message from the base station, the message including a CQI-related parameter indicating a number of times which the terminal is to transmit CQIs during the sleep window before the listening window;

transmitting the CQIs to the base station as much as the number of times during the sleep window;

transitioning to the listening window according to a listening window-related parameter after transmitting the CQIs; and

monitoring the listening window to receive a message indicating whether or not there is data or traffic transferred from the base station.

2. The method of claim 1, wherein the message is received in response to the sleep mode request message.

3. The method of claim 1, wherein the message is a downlink sleep control extended header (SCEH) received within the sleep window.

4. The method of claim 1, wherein the message further includes a second parameter which indicates a transmission period of the CQIs to be transmitted during the sleep window.

5. A method of transmitting data by a base station, the transmission method comprising:

receiving a sleep mode request message from a terminal to request to enter into a sleep mode which comprises a sleep window and a listening window;

transmitting a message to the terminal, the message including a channel quality indicator (CQI)-related parameter indicating a number of times which the terminal is to transmit CQIs during the sleep window before the listening window;

receiving the CQIs from the terminal as much as the number of times during the sleep window;

determining a modulation and coding scheme (MCS) level based on the CQIs received during the sleep window; and

transmitting data applied as the determined MCS level to the terminal during the listening window.

6. The method of claim 5, wherein the message is a downlink sleep control extended header (SCEH) received within the sleep window.

7. The method of claim 5, wherein the message further includes a second parameter which indicates a transmission period of the CQIs to be transmitted during the sleep window.