Method and apparatus for constructing MAP IE using reduced CID in broadband OFDMA systems

• US 20050201269A1
• Filed: 03/11/2005
• Published: 09/15/2005
• Est. Priority Date: 03/12/2004
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Shim, Jae-Jeong, Park, Jung-Shin, Lim, Geun-Hwi, Chang, Hong-Sung
• Granted Patent: US 8,018,969 B2
• Time in Patent Office: Days
• US Class Current: 370/208
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

A method for transmitting burst allocation information by a base station in a broadband wireless communication system in which a transmitted frame includes symbols, and orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit. The method includes the steps of generating a reduced connection identifier (CID) by reducing a basic CID of a mobile terminal connected to the base station when the basic CID exists within a preset range, and inserting an MAP, which includes an enabled field representing the reduced CID and one of use and non-use of the reduced CID, into the frame, and transmitting the frame to the mobile terminal.

Claims

1. A method for reducing size of burst allocation information by a base station in a broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit, the method comprising:

determining type of a reduced CID when a basic CID of a mobile terminal connected to the base station exists within a preset range, in order to reduce the size of the burst allocation information; and

transmitting configuration information including an enabled field representing use or non-use of the reduced CID to the mobile terminal.

2. The method in claim 1, wherein the enabled field includes at least two bits representing the use or non-use of the reduced CID and a type of the reduced CID.

3. The method in claim 2, wherein the reduced CID includes at least one bit from a Least Significant Bit (LSB) of the basic CID.

4. The method in claim 1, wherein the configuration information is disposed at a start portion of the burst allocation information.

5. A method for constructing burst allocation information by a base station in a broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit, the method comprising:

setting an enabled field, which represents use or non-use and types of a reduced connection identifier (CID), in configuration information when a basic CID of a mobile terminal connected to the base station exists within a preset range; and

setting the reduced CID in the burst allocation information in order to reduce size of the burst allocation information.

6. The method in claim 5, wherein the enabled field includes at least two bits representing use or non-use of the reduced CID and a type of the reduced CID.

7. The method in claim 5, wherein the reduced CID includes at least one bit from a Least Significant Bit (LSB) of the basic CID.

8. A broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit, the system comprising:

a base station for transmitting configuration information to a mobile terminal when a basic CID of the mobile terminal to transmit burst information exists within a preset range, the configuration information including an enabled field information for setting types and use or non-use of a reduced connection identifier (CID); and

the mobile terminal for checking a reduced CID enabled field in the configuration information transmitted from a base station, and applying the reduced CID based on the enabled field.

9. The system in claim 8, wherein the enabled field includes at least two bits representing use or non-use of the reduced CID and a type of the reduced CID.

10. The method in claim 8, wherein the reduced CID includes at least one bit from a Least Significant Bit (LSB) of the basic CID.

11. A base station in a broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit,

wherein the base station transmits configuration information to a mobile terminal when a basic CID of the mobile terminal to transmit burst information exists within a preset range, the configuration information including an enabled field information for setting types and use or non-use of a reduced connection identifier (CID).

12. The base station in claim 11, wherein the enabled field includes at least two bits representing use or non-use of the reduced CID and a type of the reduced CID.

13. The method in claim 11, wherein the reduced CID includes at least one bit from a Least Significant Bit (LSB) of the basic CID.

14. A mobile terminal in a broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit,

wherein the mobile terminal for checking an enabled field representing use or non-use of a reduced connection identifier (CID) in configuration information transmitted from a base station, applies the reduced CID based on the enabled field.

15. The mobile terminal in claim 14, wherein the enabled field includes at least two bits representing use or non-use of the reduced CID and a type of the reduced CID.

16. The method in claim 14, wherein the reduced CID includes at least one bit from a Least Significant Bit (LSB) of the basic CID.

17. A base station in a broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit, the base station comprising:

a controller for determining whether a basic connection identifier (CID) of a terminal exists within a preset range in the base station, and setting an enabled field, which sets types and one of use and non-use of the reduced CID, in configuration information; and

a transmitter for transmitting a frame obtained by multiplexing burst allocation information including the configuration information, a preamble and traffic to the terminal.

18. The base station in claim 17, further comprising;

a preamble setting unit for performing system synchronization between the base station and the terminal; and

a traffic unit for receiving traffic transmitted from an upper side.

19. The base station in claim 17, wherein the enabled field includes at least two bits representing use or non-use of the reduced CID and a type of the reduced CID.

20. A mobile terminal in a broadband wireless communication system in which a transmitted frame includes symbols, orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit, the mobile terminal comprising:

a burst allocation information detector for detecting burst allocation information from the frame and transmitting the burst allocation information to a controller; and

the controller for checking an enabled field, which represents types and use or non-use of a reduced connection identifier (CID), from the burst allocation information, and determining whether to apply the reduced CID based on the enabled field.

21. The mobile terminal in claim 20, wherein the enabled field includes at least two bits representing use or non-use of the reduced CID and a type of the reduced CID.

22. The mobile terminal in claim 20, further comprising;

a receiver for receiving the frame and performing system synchronization between a base station and the mobile terminal; and

a traffic processor for receiving the frame from the receiver, and decoding the frame by means of the burst allocation information transmitted from the controller.