System for transmitting and receiving channel allocation acknowledgement messages in a mobile communication system

• US 20060116080A1
• Filed: 11/30/2005
• Published: 06/01/2006
• Est. Priority Date: 11/30/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Eom, Kwang-Seop
• Application Number:
  US11/289,299
• Publication Number:
  US 20060116080A1
• Time in Patent Office: Days
• US Class Current: 455/62
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

After receiving the channel allocation information from a base station, a mobile station transmits a first CQI value in a first CQI transmission period and a second CQI value in a second CQI transmission period following the first CQI transmission period. The transmission of the first and second CQI values is a notification of the receipt of the channel allocation information. The mobile station measures and transmits CQI during a third CQI transmission period following the first and second CQI transmission periods.

Claims

1. A method for transmitting channel quality information (CQI) with a mobile station in a wireless communication system, the method comprising the steps of:

receiving information of a channel allocation by a base station;

after receiving the channel allocation information, transmitting a first CQI value in a first CQI transmission period and a second CQI value in a second CQI transmission period following the first CQI transmission period, wherein the transmission of the first and second CQI values is a notification of the receipt of the channel allocation information; and

measuring and transmitting CQI during a third CQI transmission period following the first and second CQI transmission periods.

2. The method of claim 1, wherein the first CQI value indicates one of the best channel condition expressible via a CQI value and the worst channel condition expressible via a CQI value and the second CQI value indicates the other one of the best and worst channel conditions.

3. The method of claim 2, wherein the first CQI value indicates the best channel condition.

4. The method of claim 1, wherein the first and second CQI transmission periods are immediately adjacent to each other in time.

5. The method of claim 1, wherein the receiving from a base station information of an allocation of a channel comprises receiving an uplink MAP UL-MAP) message that is broadcasted.

6. The method of claim 1, wherein the CQI is determined according to a signal-to-noise ratio.

7. The method of claim 1, further comprising the step of, upon receiving a channel deallocation command from the base station, transmitting the second CQI value in a fourth CQI transmission period and transmitting the first CQI value in a fifth CQI transmission period following the fourth CQI transmission period, wherein the transmission of the second and first CQI values after receiving the deallocation command is a notification of the receipt of the deallocation command.

8. The method of claim 1, wherein the transmitting of the first CQI value in the first CQI transmission period and the second CQI value in the second CQI transmission period comprises transmitting identification information of the mobile station.

9. A method for receiving channel quality information (CQI) by a base station in a wireless communication system including a mobile station and the base station for receiving CQI from the mobile station, the method comprising the steps of:

allocating a channel for CQI transmission to the mobile station;

after transmitting a notification of the channel allocation, detecting a successful channel allocation when a first CQI value is received in a first CQI reception period and a second CQI value is received in a second CQI reception period following the first CQI reception period; and

receiving CQI during a period beginning with a third CQI reception period following the second CQI reception period.

10. The method of claim 9, wherein the first CQI value indicates one of the best channel condition expressible via a CQI value and the worst channel condition expressible via a CQI value and the second CQI value indicates the other one of the best and worst channel conditions.

11. The method of claim 10, wherein the first CQI value indicates the best channel condition.

12. The method of claim 9, wherein the first and second CQI reception periods are immediately adjacent to each other in time.

13. The method of claim 9, wherein the base station allocates the channel for CQI transmission based on an uplink MAP (UL-MAP) message that is broadcasted.

14. The method of claim 9, wherein the CQI is determined according to a signal-to-noise ratio.

15. The method of claim 9, further comprising the step of, upon receiving the second CQI value in a fourth CQI transmission period and transmitting the first CQI value in a fifth CQI transmission period following the fourth CQI transmission period, detecting a receipt notification by the mobile station of a deallocation command.

16. The method of claim 9, wherein the detecting a successful channel allocation comprises receiving identification information of the mobile station.

17. A system for communicating channel quality information (CQI), he system comprising:

a base station; and

a mobile station adapted to (i) detect an allocation of a channel by a base station, (ii) transmit a first CQI value in a first CQI transmission period and a second CQI value in a second CQI transmission period following the first CQI transmission period, and (iii) measure and transmit CQI during a third CQI transmission period following the first and second CQI transmission periods, wherein the base station detects the combination of the first and second CQI values as a notification of the mobile station'"'"'s receipt of the channel allocation information.

18. The system of claim 17, wherein the first CQI value indicates one of the best channel condition expressible via a CQI value and the worst channel condition expressible via a CQI value and the second CQI value indicates the other one of the best and worst channel conditions.

19. The system of claim 18, wherein the first CQI value indicates the best positive channel condition.

20. The method of claim 17, wherein the first and second CQI transmission periods are immediately adjacent to each other in time.

21. The system of claim 17, wherein the base station is adapted to, upon receiving the second CQI value in a fourth CQI transmission period and transmitting the first CQI value in a fifth CQI transmission period following the fourth CQI transmission period, detect a receipt by the mobile station of a deallocation command.

22. The system of claim 17, wherein the base station is adapted to detect a successful channel allocation when the first CQI value is received in the first CQI reception period and the second CQI value is received in a second CQI reception period following the first CQI reception period.

23. The system of claim 17, wherein the mobile station is adapted to transmit identification information of the mobile station when the mobile station transmits the first and second CQI values.