Power-efficient channel condition feedback for OFDM channels
AssigneeMarvell International Ltd.
InventorPeter Loc
Life of this patent
Estimating the term…
Abstract
A wireless device includes a transceiver that receives packets via a wireless channel. A measurement circuit measures a channel condition of the wireless channel when the measurement circuit is in an active state. A controller identifies a request for a channel condition of the wireless channel in a first packet received by the transceiver, transitions the measurement circuit from an inactive state to the active state in response to the request, and transitions the measurement circuit to the inactive state in response to the measurement circuit having completed measuring the channel condition of the wireless channel during processing of a second packet received by the transceiver.
Claims45
A wireless device comprising:
- a transceiver configured to receive packets via a wireless channel, wherein the packets are transmitted from a network device to the wireless device via the wireless channel and include a first packet and a second packet;
- a measurement circuit configured to measure a channel condition of the wireless channel when the measurement circuit is in an active state;
- and
- a controller configured to
- identify a request for the channel condition of the wireless channel in the first packet received by the transceiver,
- transition the measurement circuit from an inactive state to the active state in response to the request, and
- transition the measurement circuit to the inactive state in response to the measurement circuit having completed measuring the channel condition of the wireless channel, wherein the measuring of the channel condition is performed during processing of the second packet received by the transceiver.
A method for operating a wireless device, the method comprising:
- receiving packets via a wireless channel, wherein the packets are transmitted from a network device to the wireless device via the wireless channel and include a first packet and a second packet;
- identifying, in the first packet received via the wireless channel, a request for a channel condition of the wireless channel;
- transitioning a measurement circuit from an inactive state to an active state in response to the request;
- when the measurement circuit is in the active state, measuring the channel condition of the wireless channel using the measurement circuit;
- and
- transitioning the measurement circuit to the inactive state in response to the measurement circuit having completed measuring the channel condition of the wireless channel,
- wherein the measuring of the channel condition is performed during processing of the second packet received via the wireless channel.
A wireless device comprising:
- a transceiver configured to receive packets via a wireless channel, wherein the packets are transmitted from a network device to the wireless device via the wireless channel and include a first packet and a second packet;
- a measurement circuit configured to measure a channel condition of the wireless channel when in an active state;
- and
- a controller configured to (i) identify a request for the channel condition in the first packet (ii) transition the measurement circuit from an inactive state to the active state prior to the second packet being received, and (iii) transition the measurement circuit to the inactive state subsequent to the measurement circuit measuring the channel condition,
- wherein the measurement circuit measures the channel condition while receiving the second packet.
A method for operating a wireless device, the method comprising:
- receiving a first packet via a wireless channel, wherein the first packet is transmitted from a network device to the wireless device via the wireless channel, and wherein the first packet includes a request for a channel condition of the wireless channel;
- in response to the request for the channel condition of the wireless channel contained in the first packet, transitioning a measurement circuit of the wireless device from an inactive state into an active state;
- while in the active state and in response to receiving a second packet via the wireless channel and from the network device, measuring the channel condition of the wireless channel based on the second packet via the measurement circuit;
- and
- subsequent to the measurement circuit measuring the channel condition of the wireless channel, transitioning the measurement circuit from the active state to the inactive state.
Dependencies are inferred from the claim text.