Low power wakeup in a wireless network
AssigneeNXP USA, Inc.
InventorsLiwen Chu, Jinjing Jiang, Hua Mu, Hongyuan Zhang, Hui-Ling Lou
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Abstract
A first communication device transmits a first packet that includes a wakeup request packet configured to prompt a wakeup radio at a second communication device to prompt a network interface device of the second communication device to transition from a low power state to an active state. The first communication device measures a delay period after an end of transmission of the first packet. The delay period corresponds to a time required for the network interface device of the second communication device to transition from the low power state to the active state. After at least the delay period, the first communication device transmits the second packet.
Claims17
A method, comprising:
- receiving, at an access point (AP), an association request frame from a client station during an association procedure for the client station to join a wireless communication network managed by the AP, the association request including an indication of a time required for a network interface device of the client station to transition from a low power state to an active state to become ready to receive packets;
- determining, at the AP, a delay period using the indication included in the association request frame, the delay period corresponding to the time required for the network interface device of the client station to transition from the low power state to the active state to become ready to receive packets;
- after receiving the association request frame, transmitting, by the AP, a first packet, wherein the first packet includes a wakeup request packet configured to prompt a wakeup radio at the client station to prompt a network interface device of the client station to transition from the low power state to the active state in which the network interface device is ready to receive a second packet from the AP;
- measuring, at the AP, the delay period after an end of transmission of the first packet;
- and
- after at least the delay period, transmitting, by the AP, the second packet.
An apparatus, comprising:
- a first network interface device associated with an access point (AP), wherein the first network interface device comprises one or more integrated circuit (IC) devices configured to:
- receive an association request frame transmitted by a client station during an association procedure for the client station to join a wireless communication network managed by the AP, the association request including an indication of a time required for a second network interface device of the client station to transition from a low power state to an active state to become ready to receive packets,
- determine a delay period using the indication included in the association request frame, the delay period corresponding to the time required for the second network interface device of the client station to transition from the low power state to the active state to become ready to receive packets,
- after receiving the association request frame, transmit a first packet that includes a wakeup request packet configured to prompt a wakeup radio at the client station to prompt the second network interface device of the client station to transition from the low power state to the active state in which the second network interface device is ready to receive a second packet from the AP,
- measure the delay period after an end of transmission of the first packet, and
- after at least the delay period, transmit the second packet.
Dependencies are inferred from the claim text.