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Machine translation
3. (WO2016018294) MOBILITY-AWARE FRAME AGGREGATION
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

What is claimed is:

1. A method for mobility-aware frame aggregation, the method comprising:

using channel state information (CSI) to determine, by a processor, a channel coherence time for a wireless channel between a mobile device and a wireless access point (AP), wherein the channel coherence time is a time duration during which the wireless channel changes due to movement of at least one of the mobile device and the wireless AP by less than a predetermined value;

determining a bit-rate supported by the wireless channel; and

using the channel coherence time and the bit rate supported by the wireless channel to determine an aggregation size for frame aggregation of packets to be transmitted over the wireless channel.

2. The method of claim 1 , wherein the predetermined value is approximately 5%.

3. The method of claim 1 , wherein using CSI to determine a channel coherence time for a wireless channel between a mobile device and a wireless AP further comprises:

determining CSI values for a predetermined time period; and

determining a maximum time lag within the predetermined time period for which a similarity between the CSI values that are determined for the

predetermined time period is greater than a further predetermined value, wherein the maximum time lag represents the channel coherence time.

4. The method of claim 3, wherein the further predetermined value is

approximately 95%.

5. The method of claim 3, further comprising:

determining the similarity between the CSI values based on a correlation between the CSI values.

6. The method of claim 1 , further comprising:

determining the CSI as a function of a number of subcarriers and antennas supported by the wireless AP.

7. The method of claim 1 , wherein the bit-rate supported by the wireless channel represents a maximum number of bits that are to be transmitted using the wireless channel without transmission failure.

8. The method of claim 1 , further comprising:

using the determined aggregation size for frame aggregation of packets; and transmitting the packets over the wireless channel.

9. A mobility-aware frame aggregation apparatus comprising:

a processor; and

a memory storing machine readable instructions that when executed by the processor cause the processor to:

determine an aggregation size for frame aggregation of data to be transmitted over a wireless channel based on changes in channel state information (CSI).

10. The mobility-aware frame aggregation apparatus according to claim 9,

wherein the machine readable instructions to determine an aggregation size for frame aggregation of data to be transmitted over a wireless channel based on changes in CSI, further cause the processor to:

determine CSI values for a time period; and

determine a maximum time lag within the time period for which a similarity between the CSI values that are determined for the time period is greater than a predetermined value.

11. The mobility-aware frame aggregation apparatus according to claim 10, wherein the similarity between the CSI values is based on a correlation between the CSI values.

12. The mobility-aware frame aggregation apparatus according to claim 10, further comprising machine readable instructions to:

use the maximum time lag and a bit rate supported by the wireless channel between a mobile device and a wireless access point (AP) to determine the aggregation size for frame aggregation of data to be transmitted over the wireless channel.

13. A non-transitory computer readable medium having stored thereon machine readable instructions to provide mobility-aware frame aggregation, the machine readable instructions, when executed, cause a processor to:

use mobility information related to at least one of a transmitter and a receiver associated with transmission of data over a wireless channel to determine an aggregation size for frame aggregation of the data to be transmitted over the wireless channel, wherein the mobility information is based on subcarriers and antennas related to the wireless channel.

14. The non-transitory computer readable medium of claim 13, wherein the mobility information is based on changes in the subcarriers and the antennas determined from channel state information (CSI).

15. The non-transitory computer readable medium of claim 13, wherein the machine readable instructions further cause the processor to:

use the mobility information to determine a channel coherence time for the wireless channel, wherein the channel coherence time is a time duration during which the wireless channel changes due to movement of at least one of a mobile device and a wireless access point (AP) by less than a user-specified value.