Wireless network including post groupcast time

• US 8,477,674 B2
• Filed: 03/12/2008
• Issued: 07/02/2013
• Est. Priority Date: 03/12/2008
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Kneckt, Jarkko, Marin, Janne, Kasslin, Mika
• Primary Examiner(s): CHAN, SAI MING
• Application Number:
  US12/075,573
• Publication Number:
  US 20090232042A1
• Time in Patent Office: 1,938 Days
• Field of Search: 370/312, 370/318
• US Class Current: 370/312
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In one aspect thereof the invention provides a method that includes transmitting from a first (beaconing) mesh point at least one multicast or broadcast frame; and transitioning the first mesh point to a lower power mode of operation state after expiration of a specified post groupcast time from a last multicast or broadcast frame that was transmitted by the beaconing mesh point after expiration of an awake window, or when the awake window expires, whichever occurs later. In another aspect thereof the invention provides a method that includes operating a peer mesh point in an awake state; and maintaining the peer mesh point in the awake state for no more than a specified post groupcast time after a last target beacon transmission time, or a last received beacon frame, or a receipt of multicast or broadcast frame having an indication that another multicast or broadcast frame will be transmitted. A computer-readable medium storing program instructions to implement the methods is also disclosed, as are corresponding apparatus.

Claims

1. A method, comprising:

transmitting with an apparatus operating as a first device of a wireless network at least one multicast or broadcast frame; and

transitioning, with the apparatus, the first device to a lower power mode of operation state after expiration of a specified post groupcast time set by a transmitted multicast or broadcast frame that was transmitted by the first device during an awake window.

2. The method of claim 1, where a value of the post groupcast time is specified in one or both of a global manner and a per link manner.

3. The method of claim 1, where a duration of the awake window is extended by the post groupcast time, and further comprising the first device entering the lower power mode of operation after expiration of the extended awake window.

11. The method of claim 3, where if the first device determines that it will not transmit another multicast frame or broadcast frame during the extended awake window, further comprising transitioning the first device to the low power mode of operation without regard for the post groupcast time.

12. The method of claim 1, where if the first device determines that it will not receive another multicast frame or broadcast frame during a current awake period, further comprising transitioning the first device to the low power mode of operation without regard for the post groupcast time.

13. The method of claim 1, where the post groupcast time is specified with at least one of an information element in a beacon frame, and a management information base variable.

4. A non-transitory computer-readable medium that stores program instructions, the execution of which results in operations that comprise:

transmitting from a first device of a wireless network at least one multicast or broadcast frame; and

transitioning the first device to a lower power mode of operation state after expiration of a specified post groupcast time set by a transmitted multicast or broadcast frame that was transmitted by the first device during an awake window.

5. The non-transitory computer readable medium of claim 4, where a value of the post groupcast time is specified in one or both of a global manner and a per link manner.

6. The non-transitory computer readable medium of claim 4, where a duration of the awake window is extended by the post groupcast time, and further comprising the first device entering the lower power mode of operation after expiration of the extended awake window.

14. The non-transitory computer-readable medium of claim 4, where if the first device determines that it will not receive another multicast frame or broadcast frame during a current awake period, further comprising transitioning the first device to the low power mode of operation without regard for the post groupcast time.

7. An apparatus, comprising:

at least one processor; and

at least one memory including computer program code, where the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus to at least;

transmit, when operating the apparatus as a first device of a wireless network, at least one multicast or broadcast frame; and

transition to a lower power mode of operation state after expiration of a specified post groupcast time set by a transmitted multicast or broadcast frame that was transmitted by the first device during an awake window.

8. The apparatus of claim 7, where a value of the post groupcast time is specified in one or both of a global manner and a per link manner.

9. The apparatus of claim 7, where a duration of the awake window is extended by the post groupcast time, and where the at least one memory including the computer program code is configured, with the at least one processor, to cause the apparatus to cause the first mesh point to enter the lower power mode of operation after expiration of the extended awake window.

10. The apparatus of claim 7, where the at least one memory including the computer program code is configured, with the at least one processor, to cause the apparatus, when operated as the first device, to operate as a beaconing device in communication with at least one peer device.

15. The apparatus of claim 7, comprising the at least one memory including the computer program code is configured, with the at least one processor, to cause the apparatus, in response to determining that it will not receive another multicast frame or broadcast frame during a current awake period, to transition the first device to the low power mode of operation without regard for the post groupcast time.