Single radio serving multiple wireless links

• US 10,470,058 B2
• Filed: 05/07/2016
• Issued: 11/05/2019
• Est. Priority Date: 05/07/2016
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Inventors: Casebolt, Mark William, Adermann, Stanley William, Chandra, Ranveer, Kumar, Amy
• Primary Examiner(s): Rutkowski, Jeffrey M
• Assistant Examiner(s): Lee, Chae S
• Application Number:
  US15/149,109
• Publication Number:
  US 20170325102A1
• Time in Patent Office: 1,277 Days
• CPC Class Codes: H04H 20/38 Arrangements for distribution where lower stations, e.g. receivers, interact with the broadcast
• CPC Class Codes: H04J 1/045 Filters applied to frequency transposition
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 40/005 Routing actions in the presence of nodes in sleep or doze mode
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/569 of the traffic information
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A computing device (such as a computer gaming console) uses only a single radio to concurrently communicate with a wireless network access point and wireless client devices such as game controllers or peripherals. To establish and maintain both a high-throughput link with the access point, and a low-latency link with the client device(s), the single Wi-Fi radio of the computing device is configured to periodically switch between a channel used for the high-throughput link and a different channel that is used for the low-latency link—thus implementing a combination of frequency division multiplexing (FDM) and time division multiplexing (TDM). The console may use aspects of the Wi-Fi protocol standard to ensure that periodically switching its single radio between the two channels is accomplished while maintaining reliable communication on both channels.

Claims

1. A method of operating a communication system, comprising:

configuring a wireless interface radio to implement a combination of frequency division multiplexing (FDM) and time division multiplexing (TDM) by

configuring the wireless interface radio to communicate with an access node using a first frequency band and a first series of time allocations, and

configuring the wireless interface radio to communicate with at least one client device using a second frequency band and a second series of time allocations, the first series of time allocations and the second series of time allocations to be non-overlapping;

sending, via the second frequency band and to at least one client device, information to be used by the at least one client device to select a time to transmit using the second frequency band; and

,

in response to a transmission from the access node and on the first frequency band, received via the wireless interface radio during a current time allocation in the first series of time allocations that begins during the current time allocation in the first series of time allocations and is expected to not complete before a scheduled end of the current time allocation in the first series of time allocations, dynamically altering a duration of the current time allocation in the first series of time allocations to complete reception of the transmission during the current time allocation in the first series of time allocations and also dynamically altering a duration of a subsequent time allocation in the second series of time allocations.

2. The method of claim 1, wherein the duration of the current time allocation is increased in response to the transmission received using the first frequency band.

3. The method of claim 2, wherein the duration of the subsequent time allocation in the second series of time allocations is decreased in response to the transmission received using the first frequency band.

4. The method of claim 1, further comprising

in response to another transmission from a client device and on the second frequency band, received via the wireless interface radio during a selected time allocation in the second series of time allocations that begins during the selected time allocation in the second series of time allocations and is not expected to complete before a scheduled end of the selected time allocation in the second series of time allocations, increasing a duration of the selected time allocation in the second series of time allocations.

5. The method of claim 4, wherein the duration of a selected time allocation in the first series of time allocations is decreased in response to the other transmission received from the client device using the second frequency band.

6. A wireless device, comprising:

a wireless interface radio configured to implement a combination of frequency division multiplexing (FDM) and time division multiplexing (TDM) to communicate with a first device using a first frequency band and a first series of time allocations that are to be used as a high-throughput link, and to also communicate with at least a second device using a second frequency band and a second series of time allocations to be used as a low-latency link, the first series of time allocations and the second series of time allocations to be non-overlapping; and

a wireless interface layer control circuit to control the wireless interface radio to send, to the second device communicating via the second frequency band, a first time indicator usable by the second device to select a first time to transmit that is during a time allocation in the second series of time allocations, wherein, in response to a transmission received from the first device and on the first frequency band during a current time allocation in the first series of time allocations that begins during the current time allocation in the first series of time allocations and is expected to not complete before a scheduled end of the current time allocation in the first series of time allocations, the wireless device is configured to dynamically alter a duration of the current time allocation in the first series of time allocations to complete reception of the transmission during the current time allocation in the first series of time allocations and also dynamically alter a duration of a subsequent time allocation in the second series of time allocations.

7. The wireless capable device of claim 6, wherein the first device comprises an access node and the second device comprises a client device.

8. The wireless capable device of claim 6, wherein the first time indicator corresponds to a time that is referenced with respect to a boundary between time allocations of the first series of time allocations and the second series of time allocations.

9. The wireless capable device of claim 6, wherein the wireless interface layer control circuit is also configured to control the wireless interface radio to send, to a third device communicating via the second frequency band, a second time indicator usable by the third device to select a second time to transmit that is during a selected time allocation in the second series of time allocations and does not collide with the first time to transmit selected by the second device.

10. The wireless capable device of claim 6, wherein, based on a transmission received from the second device, the wireless device is configured to alter a sleep duration of the second device.

11. The wireless capable device of claim 10, wherein, in response to the transmission received from the second device, the wireless device is configured to increase a duration of a selected time allocation by a first amount.

12. The wireless capable device of claim 11, wherein, in response to the transmission received from the second device, the wireless device is configured to decrease a time allocation that follows the selected time allocation by the first amount.

13. A method of operating a client device, comprising:

configuring a low-latency link between the client device and a wireless interface of a computing device, the low-latency link to use a first frequency band and a first series of time allocations, the wireless interface to implement a combination of frequency division multiplexing (FDM) and time division multiplexing (TDM) to also communicate with a network access node using a second frequency band and a second series of time allocations, the first series of time allocations and the second series of time allocations to be non-overlapping;

receiving, during a first one of the first series of time allocations and from the wireless interface and via the low-latency link, a first time indicator;

in response to the first time indicator, configuring the client device to select a first selected transmit time that is during the first one of the first series of time allocations; and

if a transmission by the client device on the first frequency band is begun at the first selected transmit time such that the transmission begins during a current time allocation in the first series of time allocations and will not complete before a scheduled end of the current time allocation in the first series of time allocations, dynamically extending the current time allocation in the first series of time allocations to allow the transmission by the client device to complete.

14. The method of claim 13, further comprising:

detecting that another device is transmitting at the first selected transmit time; and

in response to detecting that another device is transmitting at the first selected transmit time, selecting a second transmit time.

15. The method of claim 14, wherein the second transmit time is selected according to a wireless standard specified collision avoidance algorithm performed by the client device.

16. The method of claim 14, wherein the second transmit time is selected to be during the current time allocation in the first series of time allocations.

17. The method of claim 14, wherein the second transmit time is selected to be during a subsequent time allocation in the first series of time allocations.

18. The method of claim 16, wherein the first time indicator corresponds to a time that is referenced with respect to a boundary between time allocations of the first series of time allocations and the second series of time allocations.