Apparatus and method for allocating data bursts in a broadband wireless communication system

• US 20060101168A1
• Filed: 10/20/2005
• Published: 05/11/2006
• Est. Priority Date: 10/21/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sung, Sang-Hoon, Hwang, In-Seok, Yoon, Soon-Young, Cho, Jae-Hee, Huh, Hoon, Roh, Kwan-Hee
• Application Number:
  US11/254,571
• Publication Number:
  US 20060101168A1
• Time in Patent Office: Days
• US Class Current: 710/33
• CPC Class Codes: H04W 28/082 among bearers or channels
• CPC Class Codes: H04W 74/02 Hybrid access

Abstract

An apparatus and method for adjusting a data region to which data bursts are allocated in a broadband wireless communication system are provided. A cell load is calculated using information about data bursts to be transmitted and then compared with a predetermined threshold. A data region is adjusted based on the cell load such that a subchannel occupation rate is uniform over an entire data burst transmission time period, if the cell load is less than the threshold.

Claims

1. A transmission method in a broadband wireless communication system, comprising the steps of:

calculating a cell load using information about data bursts to be transmitted;

comparing the cell load with a threshold; and

adjusting a data region based on the cell load such that a subchannel occupation rate is uniform over an entire data burst transmission time period, if the cell load is less than the threshold.

2. The transmission method of claim 1, further comprising the step of sequentially allocating the data bursts in the adjusted data region and transmitting the data bursts.

3. The transmission method of claim 1, further comprising the step of forming a resource allocation message including information about the adjusted data region and transmitting the resource allocation message to a receiver.

4. The transmission method of claim 3, wherein the information about the adjusted data region includes a symbol offset value indicating a start of the adjusted data region and a subchannel offset value indicating subchannels occupied by the adjusted data region.

5. The transmission method of claim 3, wherein the resource allocation message is a hybrid automatic repeat request (HARQ) MAP message.

6. The transmission method of claim 1, further comprising the step of sequentially allocating the data bursts in a data region set for full usage of subcarrier (FUSC), if the cell load is greater than the threshold.

7. A reception method in a broadband wireless communication system, comprising the steps of:

determining if data region adjustment information exists in a received resource allocation message;

receiving data bursts in an adjusted data region indicated by the data region adjustment information, if the data region adjustment information exists; and

receiving data bursts in a data region allocated for a predetermined symbol permutation mode, if the data region adjustment information does not exist.

8. The reception method of claim 7, wherein the resource allocation message is a hybrid automatic repeat request (HARQ) MAP message.

9. The reception method of claim 7, wherein the predetermined symbol permutation mode is full usage of subcarrier (FUSC).

10. The reception method of claim 7, wherein the data region adjustment information includes a symbol offset value indicating a start of the adjusted data region and a subchannel offset value indicating subchannels occupied by the adjusted data region.

11. A transmission method in a broadband wireless communication system, comprising the steps of:

calculating a cell load using information about data bursts to be transmitted in a hybrid automatic repeat request (HARQ) mode;

setting a data region according to the cell load;

transmitting a resource allocation message including information about the data region;

sequentially allocating the data bursts in the data region; and

transmitting the data bursts.

12. The transmission method of claim 11, wherein the step of transmitting the resource allocating message comprises the steps of:

comparing the cell load with a predetermined threshold;

adjusting the data region based on the cell load such that a subchannel occupation rate is uniform over a data burst transmission time period, if the cell load is less than the threshold;

generating the resource allocation message including the information about the data region; and

transmitting the resource allocation message.

13. The transmission method of claim 11, wherein the information about the adjusted data region includes a symbol offset value indicating a start of the adjusted data region and a subchannel offset value indicating subchannels occupied by the adjusted data region.

14. A transmitter in a broadband wireless communication system, comprising:

a scheduler for adjusting a data region such that a subchannel occupation rate is uniform over an entire data burst transmission time period, if a cell load is less than the threshold;

a mapper for mapping transmission data to subchannels of the adjusted data region; and

an inverse fast Fourier transform (IFFT) processor for generating an IFFT signal by IFFT-processing the mapped data.

15. The transmitter of claim 14, wherein the scheduler generates a resource allocation message including information about the adjusted data region and the resource allocation message is transmitted to a receiver.

16. The transmitter of claim 15, wherein the information about the adjusted data region comprises:

a symbol offset value indicating a start of the adjusted data region; and

a subchannel offset value indicating subchannels occupied by the adjusted data region.

17. The transmitter of claim 15, wherein the resource allocation message is a hybrid automatic repeat request (HARQ) MAP message.

18. The transmitter of claim 14, further comprising a radio frequency (RF) processor for upconverting the IFFT signal to an RF signal and transmitting the RF signal.

19. A receiver in a broadband wireless communication system, comprising:

a controller for receiving a resource allocation message including information about a data region adjusted according to a cell load, and generating a control signal to receive data in the adjusted data region;

a fast Fourier transform (FFT) processor for FFT-processing a received signal and outputting subcarrier values; and

a demapper for extracting subcarrier values with actual data among the subcarrier values received from the FFT processor.

20. The receiver of claim 19, wherein the resource allocation message is a hybrid automatic repeat request (HARQ) MAP message.

21. The receiver of claim 19, wherein the information about the adjusted data region comprises:

a symbol offset value indicating a start of the adjusted data region; and

a subchannel offset value indicating subchannels occupied by the adjusted data region.