Dynamic resource allocation method for an OFDMA system

• US 20060007849A1
• Filed: 07/11/2005
• Published: 01/12/2006
• Est. Priority Date: 07/10/2004
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cho, Sung-Hyun, Yun, Sang-Boh, Lee, Jeong-Hwan, Kang, Chung-Gu, Kim, Il-Whan, Park, Won-Hyoung
• Granted Patent: US 7,522,637 B2
• Time in Patent Office: Days
• US Class Current: 370/208
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A dynamic resource allocation method in an OFDMA system is provided. A base station determines if each of a plurality of SSs supports subchannel-based dynamic resource allocation. If an SS supports the subchannel-based dynamic resource allocation, the base station allocates resources to the SS on a subchannel basis. If the SS does not support the subchannel-based dynamic resource allocation, the base station allocates resources to the SS on a burst basis.

Claims

1. A dynamic resource allocation method for a multicarrier wireless communication system including at least one base station allocating resources to a plurality of subscriber stations (SSs) according to channel status information received from the plurality of SSs, comprising the steps of:

determining if each of the plurality of SSs supports subchannel-based dynamic resource allocation;

allocating resources to an SS on a subchannel basis, if the SS supports the subchannel-based dynamic resource allocation; and

allocating resources to the SS on a burst basis, if the SS does not support the subchannel-based dynamic resource allocation.

2. The dynamic resource allocation method of claim 1, wherein the step of allocating resources on the subchannel basis comprises the steps of:

transmitting a second-type downlink MAP information element (DL-MAP IE) to the SS;

receiving channel status information on the subchannel basis from the SS; and

modulating and coding data for the SS on the subchannel basis according to the channel status information.

3. The dynamic resource allocation method of claim 2, wherein the step of allocating resources on the burst basis comprises the steps of:

transmitting a first-type DL-MAP IE to the SS;

receiving channel status information on the burst basis from the SS; and

modulating and coding data for the SS on the burst basis according to the channel status information.

4. The dynamic resource allocation method of claim 3, further comprising the steps of:

mapping the subchannel-based modulated and coded signal and the burst-based modulated and coded signal to one frame; and

transmitting the frame.

5. The dynamic resource allocation method of claim 1, wherein the step of allocating resources on the burst basis comprises the steps of:

transmitting a first-type DL-MAP IE to the SS;

receiving channel status information on the burst basis from the SS; and

modulating and coding data for the SS on the burst basis according to the channel status information.

6. A dynamic resource allocation method an orthogonal frequency division multiple access (OFDMA) wireless communication system including at least one base station allocating resources to a plurality of subscribers stations (SSs) according to channel status information received from the plurality of SSs, comprising the steps of:

transmitting a downlink MAP (DL MAP) to the plurality of SSs for access to DL information;

receiving channel status information on a subchannel basis from the plurality of SSs according to information of the DL MAP; and

dynamically allocating resources on the subchannel basis to bursts to be delivered to the plurality of SSs according to the channel status information and the DL MAP information.

7. The dynamic resource allocation method of claim 6, wherein the DL MAP includes a downlink MAP information element (DL-MAP IE) for each subchannel.

8. The dynamic resource allocation method of claim 7, wherein the DL-MAP IE has a MAP structure determined by a MAP type field.

9. The dynamic resource allocation method of claim 8, wherein the MAP type field is 4 bits.

10. The dynamic resource allocation method of claim 9, wherein the bits of the MAP type field represent a Common Traffic Channel (CTCH) allocation, a periodic allocation, a subchannel selection AMC (SS-AMC), and an extended CID, which are sequentially in an order from a Most Significant Bit (MSB) to a Least Significant Bit (LSB).

11. The dynamic resource allocation method of claim 10, wherein the resources allocating step comprises allocating resources on the subchannel basis when the SS-AMC bit is 1.

12. The dynamic resource allocation method of claim 11, wherein the resources allocating step further comprises allocating resources on a burst basis when the SS-AMC bit is 0.