Method and apparatus of dynamic Wi-Fi multi-channel switch based on data traffic context

• US 9,848,420 B2
• Filed: 03/23/2016
• Issued: 12/19/2017
• Est. Priority Date: 04/01/2015
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Bai, Fan, Thanayankizil, Lakshmi V., Pop, David P.
• Primary Examiner(s): Kassim, Khaled
• Assistant Examiner(s): Ali, Syed S
• Application Number:
  US15/078,295
• Publication Number:
  US 20160295563A1
• Time in Patent Office: 636 Days
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

A dynamic wireless multi-channel switch including a networking device providing access to communicate messages on at least two frequency bands. A wireless access manager module determines a utilization of each frequency band based on the communicated messages. The wireless access manager module dynamically adjusts a time slot ratio of each frequency band as a function of the utilization of the communicated messages by the networking device.

Claims

1. A dynamic wireless multi-channel switch comprising:

a networking device including a processor and memory, the network device providing access to communicate messages on at least two frequency bands;

a wireless access manager module determining a utilization of each frequency band based on the communicated messages, the wireless access manager module dynamically adjusting a time slot ratio of each frequency band as a function of the utilization of the communicated messages by the networking device;

wherein the wireless access manager module applies a dynamic slot ratio technique by utilizing application priority and historical statistics of the at least two frequency bands;

wherein one of the at least two frequency bands is identified as a high-priority frequency band and the other of the at least two frequency bands is identified as a low-priority frequency band;

wherein the wireless access manager module determines the utilization of the high-priority band when the utilization is substantially less than the determined utilization value, wherein the utilization is set as follows;

when (utilization<

<

t_high), then t-high=max(t_high−

−

, t_high_min) where utilization is a current utilization of high-priority band, t_high is a determined utilization time for the high-priority band, t_high−

−

is equal to t_high less a first predetermined adjustment value, and t_high_min is a predetermined minimum value;

wherein the wireless access manager module determines the utilization of the high-priority band when the utilization is substantially equal to the determined utilization value of the high priority band, wherein the utilization is set as follows;

when (utilization.about.=t_high), then t-high=min(t_high++, t_high_max) where utilization is the current utilization of the high-priority band, t_high is the determined utilization time for the high priority band, t_high++ is equal to t_high plus a second predetermined adjustment value, and t_high_max is a predetermined maximum value; and

wherein the wireless access manager module determines the utilization of the low-priority band when the utilization based on the following equation;

t_low=t-t_high where t_high is the determined utilization of the high priority band, and t is the periodic utilization time allocated for a duty cycle of t_low and t_high.

2. The dynamic wireless multi-channel switch of claim 1 further comprising a first wireless device communicating on a first frequency band and a second wireless device communicating on a second frequency band.

3. The dynamic wireless multi-channel switch of claim 1 wherein the network device includes a wireless chipset supporting a plurality of frequency bands.

4. The dynamic wireless multi-channel switch of claim 1 wherein the utilization of the high priority band is determined to be either substantially less than a determined utilization value or substantially equal to the determined utilization value.

5. The dynamic wireless multi-channel switch of claim 1 wherein t_high is initially assigned a predetermined value for a first assessment of whether the utilization is substantially less than or equal to t_high for the high-priority band.

6. The dynamic wireless multi-channel switch of claim 1 wherein each respective frequency band includes a plurality of channels, wherein the wireless access manager module dynamically negotiates channel selection for messages transmitted on the frequency bands, the wireless access manager module migrating the message to other channels within a respective frequency band when contention is identified by the wireless access manager module on a current channel of the respective frequency band.

7. The dynamic wireless multi-channel switch of claim 6 wherein the wireless access manager module selects another channel within the frequency band that is orthogonal to the current channel having contention.

8. The dynamic wireless multi-channel switch of claim 7 wherein the wireless access manager module determines a congestion level as a function of message characteristics.

9. The dynamic wireless multi-channel switch of claim 8 wherein the message characteristics include a timestamp of when a message is recorded.

10. The dynamic wireless multi-channel switch of claim 9 wherein the message characteristics include an access time on the channel for a message.

11. The dynamic wireless multi-channel switch of claim 7 wherein the wireless access manager module determines a congestion level as a function of channel characteristics that include channel utilization, latency, and packet delivery ratio.

12. The dynamic wireless multi-channel switch of claim 11 wherein the wireless access manager module applies a weight to each of the channel characteristics to determination congestion on the respective channel.