Method and apparatus for bandwidth and frequency management in the U-NII band

• US 7,505,479 B2
• Filed: 11/20/2003
• Issued: 03/17/2009
• Est. Priority Date: 08/04/1999
• Status: Expired due to Fees

• Current Assignee: The Connectivity Patent Trust
• Original Assignee: Atheros Communications Incorporated (Qualcomm, Inc.)
• Inventors: Meng, Teresa H.
• Primary Examiner(s): Moe; Aung S
• Assistant Examiner(s): Haile; Feben
• Application Number:
  US10/716,544
• Publication Number:
  US 20040101037A1
• Time in Patent Office: 1,944 Days
• Field of Search: 370/328, 370/332, 370/465, 370/318, 370/468, 370/329, 455/522, 455/69, 455/452.1, 455/226.2, 455/115.3
• US Class Current: 370/465
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 52/267 taking into account the information rate

Abstract

The present invention provides an apparatus and method for optimizing power in order to increase capacity. Rather than having any terminal device limited to a specific maximum data rate, instead the terminal device data rate is limited by the power being used, such that the data rate can vary according to the distance that the terminal device is from the intended receiver.

Claims

1. An apparatus for dynamically allocating a data rate for wireless communication, comprising:

a first transceiver; and

a second transceiver,

the first transceiver including means for transmitting first communication data at a first power level and a first data rate to said second transceiver,

the second transceiver including;

second means for receiving the first coinniunication data;

second means for sensing a received power level of the received first communication data;

second means for transmitting second communication data at a second power level and a second data rate to said first transceiver; and

second means for determining the second data rate at which to transmit the second communication data, said second data rate determined based upon the received power level of the first communication data received by the second transceiver front the first transceiver, to be adaptively adjusted in dynamic manner responsive to a distance directly between said first and second transceivers, said second data rate being different from the first data rate;

wherein said second data rate is set accordingi to a maximum data rate maintained in inversely proportional relation to the distance directly between said first and second transceivers.

2. The apparatus according to claim 1 wherein the second data rate is chosen from one of a plurality of predetermined data rates.

3. The apparatus according to claim 1, wherein each of the means for transmitting data transmits using the 5.725-5.825 GHz band.

4. The apparatus according to claim 1, wherein each of the means for transmitting the data transmits using one of the 5.25-5.35 GHz and 5.15-5.25 GHz bands.

5. The apparatus according to claim 1, wherein the first power level is greater than the second power level.

6. A method of dynamically allocating a data rate for wireless communication between a first transceiver and a second transceiver comprising the steps of:

transmitting communication data at a first power level and a first data rate from a first transceiver to a second transceiver;

receiving the communication data at the second transceiver;

sensing the received power level of the received communication data;

determining a second data rate different from the first data rate at which to transmit other communication data, said second data determined based upon the received power level of the communication data received by the second transceiver from the first transceiver, to be adaptively adjusted in dynamic manner responsive to a distance directly between the first and second transceivers; and

transmitting the other communication data at the second data rate and a second power level, from the second transceiver to the first transceiver; and

further including the step of;

receiving the other communication data at the first transceiver;

wherein said second data rate is set according to a maximum data rate maintained in inversely proportional relation to the distance directly between said first and second transceivers.

7. The method according to claim 6 wherein the second power level is different than the first power level.

8. The method according to claim 6 wherein the steps of sensing the received power level of the received communication data and determining the second data rate are performed by the second transceiver.

9. The method according to claim 6 wherein the step of transmitting the other communication data will transmit at the second data rate that is chosen from one of the plurality of predetermined data rates.

10. A method of dynamically allocating a data rate for wireless communication between a first transceiver and a second transceiver comprising the steps of:

transmitting communication data at a first power level and a first data rate from a first transceiver to a second transceiver;

receiving the communication data at the second transceiver;

sensing the received power level of the received communication data;

determining a second data rate different from the first data rate at which to transmit other communication data, said second data rate determined based upon the received power level of the communication data received by the second transceiver from the first transceiver, to be adaptively adjusted in dynamic manner responsive to a distance directly between the first and second transceivers; and

wherein said step of determing occurs without the occurence of a specific request for a data rate change; and

transmitting the other communication data at the second data rate and a second power level, from the second transceiver to the first transceiver; and

further including the step of;

receiving the other communication data at the first transceiver;

wherein said second data rate is set according to a maximum data rate maintained in inversely proportional relation to the distance directly between said first and second transceivers.

11. The method according to claim 10 wherein the second power level is different than the first power level.

12. The method according to claim 10 wherein the steps of sensing and determining are performed by the second transceiver.