Multicast group address signaling using MAC header for power save delivery in a wireless network

Abstract

Various embodiments are disclosed relating to multicast group address signaling using a MAC header for power save delivery in a wireless network. According to an example embodiment, a multicast management frame (e.g., a multicast 802.11n Power Save Multi Poll (PSMP) frame) may be transmitted to identify a scheduled multicast data transmission to one or more receiver nodes in a wireless network. The multicast management frame may include a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame. The management frame may also include one or more downlink transmission fields to identify a time and/or duration of the scheduled multicast data transmission.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram illustrating a wireless network according to an example embodiment.

FIG. 2 is a diagram illustrating a format of a multi poll message, such as a Power Save Multi Poll (PSMP) management frame, according to an example embodiment.

FIG. 3 is a diagram illustrating a PSMP sequence according to an example embodiment.

FIG. 4 is a diagram illustrating a PSMP sequence according to another example embodiment.

FIG. 5 is a diagram illustrating a PSMP sequence according to yet another example embodiment.

FIG. 6 is a flow chart illustrating operation of a wireless node according to an example embodiment.

FIG. 7 is a flow chart illustrating operation of a wireless node according to another example embodiment.

FIG. 8 is a flow chart illustrating operation of a wireless node according to yet another example embodiment.

FIG. 9 is a block diagram illustrating an apparatus 900 that may be provided in a wireless node according to an example embodiment.

FIG. 10 is a flow chart illustrating operation of a wireless node according to another example embodiment.

FIG. 11 is a flow chart illustrating operation of a wireless node according to yet another example embodiment.

Claims

1. A method comprising: transmitting a multicast management frame to identify a scheduled multicast data transmission to one or more receiver nodes in a wireless network, the management frame including a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame, the management frame including one or more downlink transmission fields to identify a time and/or duration of the scheduled multicast data transmission.

2. The method of claim 1, wherein the transmitting comprises transmitting the management frame, the management frame further including a downlink transmission start offset field indicating a start time for the multicast data transmission and a downlink transmission duration field indicating a duration of the multicast data transmission.

3. The method of claim 1, further comprising transmitting one or more multicast data frames to the one or more receiver nodes, each of the one or more multicast data frames including the multicast group address provided in the Medium Access Control (MAC) destination address field of the MAC header of the data frame.

4. The method of claim 1 and further comprising: determining power save multi poll capabilities of the one or more receiver nodes;associating with the one or more receiver nodes;establishing a data transmission schedule or service period for each of the one or more receiver nodes, the management frame being transmitted to the one or more receiver nodes within the service period.

5. The method of claim 1, wherein the transmitting comprises transmitting the management frame, the management frame further including one or more uplink transmission fields for each of the one or more receiver nodes to identify an uplink schedule to allow each of the one or more receiver nodes to transmit acknowledgements to acknowledge receipt of one or more data frames of the scheduled multicast data transmission.

6. An apparatus provided in a wireless node of a wireless network, the apparatus comprising: a controller;a memory coupled to the controller; anda wireless transceiver coupled to the controller; andthe apparatus being adapted to:transmit a multicast management frame to identify a scheduled multicast data transmission to one or more receiver nodes in a wireless network, the multicast management frame including a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame and one or more downlink transmission fields to identify a time and/or duration of the scheduled multicast data transmission.

7. The apparatus of claim 6 wherein the management frame comprises a Power Save Multi Poll (PSMP) frame.

8. The apparatus of claim 6 wherein the management frame comprises an IEEE 802.11n Power Save Multi Poll (PSMP) frame.

9. A method comprising: transmitting a multicast management frame to identify a scheduled multicast downlink data transmission to one or more receiver nodes in a wireless network, the management frame including:a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame;a field indicating multicast transmission;a field indicating a transmission start time for the multicast transmission; anda field indicating a transmission duration of the multicast transmission.

10. The method of claim 9 wherein the transmitting comprises transmitting a multicast management frame, the field indicating a transmission start time for the multicast transmission comprises a DLT start offset field for the multicast transmission.

11. The method of claim 9 wherein the transmitting comprises transmitting a multicast management frame, the field indicating a transmission duration for the multicast transmission comprises a DLT duration field for the multicast transmission.

12. An apparatus adapted for wireless communication, the apparatus comprising: a controller, the controller being configured to:transmit a multicast management frame to identify a scheduled multicast downlink data transmission to one or more receiver nodes in a wireless network, the management frame including: a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame;a field indicating multicast transmission;a field indicating a transmission start time for the multicast transmission; anda field indicating a transmission duration of the multicast transmission.

13. The apparatus of claim 12 wherein the management frame comprises a Power Save Multi Poll (PSMP) frame.

14. The apparatus of claim 12 wherein the management frame comprises an IEEE 802.11n Power Save Multi Poll (PSMP) frame.

15. The apparatus of claim 12 wherein the field indicating a transmission start time for the multicast transmission comprises a DLT start offset field for the multicast transmission, and the field indicating a transmission duration for the multicast transmission comprises a DLT duration field for the multicast transmission.

16. A method comprising: transmitting a multicast management frame to identify a scheduled multicast data transmission to one or more receiver nodes in a wireless network, the management frame including a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame, the management frame including the following for a receiver node: a field to identify the multicast transmission;a station identifier to identify the receiver node; andan uplink transmission schedule to identify a time for the receiver node to transmit data frames and/or transmit acknowledgements to acknowledge receipt of one or more data frames of the scheduled multicast data transmission.

17. The method of claim 16 and further comprising: transmitting one or more multicast data frames to the one or more receiver nodes, each of the one or more multicast data frames including a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the data frame; andreceiving one or more acknowledgements from the one or more receiver nodes in accordance with the uplink transmission schedule for the one or more receiver nodes, the acknowledgements acknowledging receipt by the one or more receiver nodes of the transmitted one or more multicast data frames.

18. An article comprising: a storage medium;said storage medium including instructions stored thereon that, when executed by a processor, result in:transmitting a multicast management frame to identify a scheduled multicast downlink data transmission to one or more receiver nodes in a wireless network, the management frame including: a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame;a field indicating multicast transmission;a field indicating a transmission start time for the multicast transmission; anda field indicating a transmission duration of the multicast transmission

19. A method comprising: transmitting a management frame to one or more receiver nodes in a wireless network, the management frame including a data transmission schedule;transmitting one or more multicast downlink data transmissions after the transmitting the management frame, the multicast downlink data transmissions being transmitted at times indicated by the management frame;transmitting, after transmitting the multicast data transmissions, one or more downlink unicast data transmissions to one or more of the receiver nodes at times indicated by the management frame; andreceiving, after transmitting the downlink unicast data transmissions, uplink unicast transmissions, if any, from one or more of the receiver nodes.

20. The method of claim 19 wherein the management frame comprises a 802.11 Power Save Multi Poll (PSMP) frame, the transmitting and receiving being part of a PSMP sequence.

21. The method of claim 19 wherein the management frame includes a multicast group address provided in a Medium Access Control (MAC) destination address field of a MAC header of the management frame.