Delayed host wakeup for wireless communications device

• US 20070238437A1
• Filed: 04/10/2006
• Published: 10/11/2007
• Est. Priority Date: 04/10/2006
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Jaakkola, Mikko
• Application Number:
  US11/402,285
• Publication Number:
  US 20070238437A1
• Time in Patent Office: Days
• US Class Current: 455/343.100
• CPC Class Codes: H04W 52/0251 using monitoring of local events, e.g. events related to user activity
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A new and unique method or apparatus for power savings in a node, point, terminal or device in a wireless local area network (WLAN), or other suitable network, featuring one or more steps for delaying forwarding one or more data packets from a WLAN chipset to a host processor based on information received by the WLAN chipset about whether the host processor is in a sleep state. The host processor has a clock request pin to indicate when it is in the sleep state. The WLAN chipset has a pin that is connected to a sleep state signal of the host processor so that the WLAN chipset knows when it can wake up the host processor or not. The WLAN chipset has an internal threshold timer to fulfil latency requirements for delivering packets to the host processor.

Claims

1. A method comprising:

receiving a chipset in a node, point, terminal or device that forms part of a wireless communications technology, including a wireless local area network (WLAN), or other suitable network, information about whether the host processor is in a sleep state; and

delaying forwarding one or more data packets from a WLAN chipset to a host processor based on information received by the WLAN chipset for power saving in node, point, terminal or device.

2. A method according to claim 1, wherein the host processor has a pin, such as a clock request pin, to indicate when it is in the sleep state.

3. A method according to claim 1, wherein the WLAN chipset has a pin that is connected to a sleep state signal of the host processor so that the WLAN chipset knows when it can wake up the host processor or not.

4. A method according to claim 1, wherein the WLAN chipset has an internal threshold timer to fulfil latency requirements for delivering packets to the host processor.

5. A method according to claim 1, wherein if the WLAN chipset detects via a wired connector that the host processor is in the sleep state, then the WLAN chipset will not deliver any packets to the host processor until one of the following conditions is met:

a) a receive (RX) delay timer has expired,

b) the WLAN chipset starts to run out of memory or a buffering threshold,

c) the host processor wakes up before the RX delay timer has been expired, or

d) a packet being delayed has been configured to be a high priority packet from a system point of view that would suffer from the extra latency.

6. A method according to claim 1, wherein the WLAN chipset provides a signal on an interrupt pin to wake up the host processor from the sleep state.

7. A method according to claim 6, wherein the WLAN chipset provides the signal after the WLAN chipset internal timer expires or after the host processor wakes up.

8. A method according to claim 7, wherein the host processor wakes up after a host processor internal time expires.

9. A method according to claim 1, wherein the node, point, terminal or device is a station (STA), or other suitable network node or terminal in the WLAN.

28. A method according to claim 1, wherein the method further comprises implementing the step of the method via a computer program running in a processor, controller or other suitable module in one or more network nodes, points, terminals or elements in the wireless LAN network.

31. A method according to claim 1, wherein the host processor provides a system clock request signal to get a main processor running.

32. A method according to claim 31, wherein the host processor provides the system clock request signal to the WLAN chipset.

10. A node, point, terminal or device comprising:

a first chipset module configured for receiving information about whether a host processor is in a sleep state, where the node, point, terminal or device forms part of a wireless communications technology, including a wireless local area network or other suitable network; and

a second chipset module configured for delaying forwarding one or more data packets to the host processor based on the information received.

11. A node, point, terminal or device according to claim 10, wherein the host processor has a pin, such as a clock request pin, to indicate when it is in the sleep state.

12. A node, point, terminal or device according to claim 10, wherein the WLAN chipset has a pin that is connected to a sleep state signal of the host processor so that the WLAN chipset knows when it can wake up the host processor or not.

13. A node, point, terminal or device according to claim 10, wherein the WLAN chipset has an internal threshold timer to fulfil latency requirements for delivering packets to the host processor.

14. A node, point, terminal or device according to claim 10, wherein if the WLAN chipset detects via a wired connector that the host processor is in the sleep state, then the WLAN chipset will not deliver any packets to the host processor until one of the following conditions is met:

a) a receive (RX) delay timer has expired,

b) the WLAN chipset starts to run out of memory or a buffering threshold,

c) the host processor wakes up before the RX delay timer has been expired, or

d) a packet being delayed has been configured to be a high priority packet from a system point of view that would suffer from the extra latency.

15. A node, point, terminal or device according to claim 10, wherein the WLAN chipset provides a signal on an interrupt pin to wake up the host processor from the sleep state.

16. A node, point, terminal or device according to claim 15, wherein the WLAN chipset provides the signal after the WLAN chipset internal timer expires or after the host processor wakes up.

17. A node, point, terminal or device according to claim 16, wherein the host processor wakes up after a host processor internal time expires.

18. A node, point, terminal or device according to claim 10, wherein the node, point, terminal or device is a station (STA), or other suitable network node or terminal in the WLAN.

33. A node, point, terminal or device according to claim 10, wherein the host processor provides a system clock request signal to get a main processor running.

34. A node, point, terminal or device according to claim 10, wherein the host processor provides the system clock request signal to the WLAN chipset.

19. A chipset comprising:

a first chipset module configured for receiving information about whether a host processor is in a sleep state for a node, point, terminal or device that forms part of a wireless communications technology, including a wireless local area network or other suitable network; and

a second chipset module configured for delaying forwarding one or more data packets to the host processor based on information received.

20. A WLAN chipset according to claim 19, wherein the WLAN chipset has a pin that is connected to a corresponding pin, such as a clock request pin, of the host processor that indicate when it is in the sleep state so that the WLAN chipset knows when it can wake up the host processor or not.

21. A WLAN chipset according to claim 19, wherein the WLAN chipset has an internal threshold timer to fulfil latency requirements for delivering packets to the host processor.

22. A WLAN chipset according to claim 19, wherein if the WLAN chipset detects via a wired connector that the host processor is in the sleep state, then the WLAN chipset will not deliver any packets to the host processor until one of the following conditions is met:

a) a receive (RX) delay timer has expired,

b) the WLAN chipset starts to run out of memory or a buffering threshold,

c) the host processor wakes up before the RX delay timer has been expired, or

d) a packet being delayed has been configured to be a high priority packet from a system point of view that would suffer from the extra latency.

23. A WLAN chipset according to claim 19, wherein the WLAN chipset provides a signal on an interrupt pin to wake up the host processor from the sleep state.

24. A WLAN chipset according g to claim 23, wherein the WLAN chipset provides the signal after the WLAN chipset internal timer expires or after the host processor wakes up.

25. A WLAN chipset according to claim 24, wherein the host processor wakes up after a host processor internal time expires.

26. A WLAN chipset according to claim 19, wherein the network node, point, terminal or device includes a station (STA), or other suitable network node or terminal in the WLAN.

35. A WLAN chipset according to claim 19, wherein the WLAN chipset receives a system clock request signal from the host processor indicating that the host processor is trying to get the main processor running.

27. A computer program product with a program code, which program code is stored on a machine readable carrier, for carrying out the steps of a method comprising receiving in a chipset of a node, point, terminal or device that forms part of a wireless communications technology, including a wireless local area network or other suitable network, information about whether a host processor is in a sleep state, and delaying forwarding one or more data packets from the chipset to the host processor based on the information received, when the computer program is run in a module of either a node, point, terminal or device, such as a station (STA), an Access Point (AP), or other suitable node, point, terminal or device.

29. A method comprising:

receiving one or more data packets from a wireless communications network, including a wireless local area network (WLAN) or other suitable network;

obtaining information regarding an operational state of a host processor; and

if the host processor is in a sleep state, delaying forwarding of the one or more data packets to the host processor until one or more threshold criteria is met for enhancing power savings in a wireless communications technology, including a wireless local area network (WLAN) or other suitable network.

30. A method according to claim 29, wherein packets are not delivered to the host processor until one or more of the following threshold criteria conditions is met:

a) a receive (RX) delay timer has expired,

b) a WLAN chipset starts to run out of memory or a buffering threshold, or

c) the host processor wakes up before the RX delay timer has been expired.

36. Apparatus comprising:

means for receiving in a chipset in a node, point, terminal or device that forms part of a wireless communications technology, including a wireless local area network (WLAN), or other suitable network, information about whether the host processor is in a sleep state; and

means for delaying forwarding one or more data packets from a WLAN chipset to a host processor based on information received by the WLAN chipset for power saving in node, point, terminal or device.