Method and apparatus for allocating and identifying frequency resources in a frequency division multiple access system

• US 20070230350A1
• Filed: 03/20/2007
• Published: 10/04/2007
• Est. Priority Date: 03/20/2006
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Heo, Youn-Hyoung, Lee, Ju-Ho
• Granted Patent: US 8,520,654 B2
• Time in Patent Office: Days
• US Class Current: 370/235
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A method is provided for allocating and identifying frequency resources to a terminal in a Frequency Division Multiple Access (FDMA) system. The method includes receiving from a base station a scheduling message including frequency resource information; and calculating the allocated frequency resource based on relative information if the scheduling message is a Relative Grant (RG) message including the relative information generated on a basis of a currently used channel. The relative information includes one of an identifier of a terminal, or an identifier of a channel in use by the terminal as a terminal ID, state information indicating number of channel that stands for increase or decrease amount of frequency resources on a basis of the currently used channel, and, direction information indicating a direction of the state information.

Claims

1. A method for identifying frequency resources allocation in a terminal of a Frequency Division Multiple Access (FDMA) system, the method comprising the steps of:

(a) receiving from a base station a scheduling message including frequency resource information; and

(b) calculating an allocated frequency resource based on relative information if the scheduling message is a Relative Grant (RG) message including the relative information generated on a basis of a currently used channel.

2. The method of claim 1, further comprising transmitting data using the calculated frequency resource.

3. The method of claim 1, wherein the relative information comprises:

one of an identifier of a terminal, or an identifier of a channel in use by the terminal as a terminal ID;

state information indicating number of channel that stands for increase or decrease amount of frequency resources on a basis of the currently used channel; and

direction information indicating a direction of the state information.

4. The method of claim 3, wherein the step (b) comprises:

checking the relative information if the system uses a localized frequency allocation scheme; and

adding the number of channel in the state information to a maximum channel identifier in use by the terminal if the state information indicates increase by the number of channel and the direction information indicates positive direction.

5. The method of claim 4, further comprising:

subtracting the number of channel in the state information from a minimum channel identifier in use by the terminal if the state information indicates increase by the number of channel and the direction information indicates negative direction.

6. The method of claim 4, further comprising:

subtracting the number of channel in the state information from a maximum channel identifier in use by the terminal if the state information indicates decrease by the number of channel and the direction information indicates positive direction.

7. The method of claim 4, further comprising:

adding the number of channel in the state information to a minimum channel identifier if the state information indicates decrease by the number of channel and the direction information indicates negative direction.

8. The method of claim 1, further comprising:

discarding existing frequency resources currently used by the terminal if the scheduling message is an Absolute Grant (AG) message including new frequency resource information; and

transmitting data using the new frequency resource information.

9. An apparatus for identifying frequency resources allocation in a terminal of a Frequency Division Multiple Access (FDMA) system, the apparatus comprising:

a receiver for receiving from a base station a scheduling message including frequency resource information;

a data transmission controller for calculating an allocated frequency resource based on relative information if the scheduling message is a Relative Grant (RG) message including the relative information generated on a basis of a currently used channel; and

a data channel transmitter for transmitting data using the calculated frequency resource.

10. The apparatus of claim 9, wherein the receiver comprises:

an Absolute Grant (AG) receiver for receiving an AG message including new frequency resource information; and

an RG receiver for receiving the RG message including the relative information generated on a basis of the currently used channel.

11. The apparatus of claim 9, wherein the relative information comprises:

one of an identifier of a terminal or an identifier of a channel in use by the terminal as a terminal ID;

state information indicating number of channel that stands for increase or decrease amount of frequency resources on a basis of the currently used channel; and

direction information indicating a direction of the state information.

12. The apparatus of claim 11, wherein the data transmission controller:

checks the relative information if the system uses a localized frequency allocation scheme; and

adds the number of channel in the state information to a maximum channel identifier in use by the terminal if the state information indicates increase by the number of channel and the direction information indicates positive direction.

13. The apparatus of claim 12, wherein the data transmission controller subtracts the number of channel in the state information from a minimum channel identifier in use by the terminal if the state information indicates increase by the number of channel and the direction information indicates negative direction.

14. The apparatus of claim 12, wherein the data transmission controller subtracts the number of channel in the state information from a maximum channel identifier in use by the terminal if the state information indicates decrease by the number of channel and the direction information indicates positive direction.

15. The apparatus of claim 12, wherein the data transmission controller adds the number of channel in the state information to a minimum channel identifier if the state information indicates decrease by the number of channel and the direction information indicates negative direction.

16. The apparatus of claim 9, wherein the data transmission controller:

discards existing frequency resources currently used by the terminal if the scheduling message is an AG message including new frequency resource information; and

transmits data using the new frequency resource information.

17. A method for allocating frequency resources in a base station of a Frequency Division Multiple Access (FDMA) system, the method comprising:

generating a Relative Grant (RG) message including relative information generated on a basis of a currently used channel, if there is a change in frequency resources allocated to a specific terminal; and

transmitting the generated RG message to the terminal.

18. The method of claim 17, wherein the relative information comprises:

one of an identifier of a terminal or an identifier of a channel in use by the terminal as a terminal ID;

state information indicating number of channel that stands for increase or decrease amount of frequency resources on a basis of the currently used channel; and

direction information indicating a direction of the state information.

19. An apparatus for allocating frequency resources in a base station of a Frequency Division Multiple Access (FDMA) system, the apparatus comprising:

a controller for generating a Relative Grant (RG) message including relative information generated on a basis of a currently used channel, if there is a change in frequency resources allocated to a specific terminal; and

a transmitter for transmitting the generated RG message to the terminal.

20. The apparatus of claim 19, wherein the relative information comprises:

one of an identifier of a terminal or an identifier of a channel in use by the terminal as a terminal ID;

state information indicating number of channel that stands for increase or decrease amount of frequency resources on a basis of the currently used channel; and

direction information indicating a direction of the state information.