Methods, systems and devices for varying wireless transmit power based on path loss information
AssigneeCypress Semiconductor Corporation
InventorsXianmin Wang, Hui Luo, Hongwei Kong
Life of this patent
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Abstract
A method can include at a first station in a wireless network, receiving path loss (PL) transmissions from at least a second station, dynamically changing power for transmissions from the first station to the second station based on the received PL information, determining PL values for transmissions received at the first station from other stations, and sending PL transmissions from the first station that include the determined PL values for at least one other station. The PL transmissions are configured to be received by stations of the same wireless network and stations of a different wireless network. Corresponding devices and systems are also disclosed.
Claims14
A wireless device, comprising:
- wireless communication circuits compatible with at least one 802.11 wireless standard and including:
- a power control section configured to dynamically change transmission (TX) power for transmissions to a destination station device (STA) based on path loss (PL) information for the destination STA, the PL information corresponding to a loss in TX power from the wireless device to the destination STA;
- a power detection section configured to detect a received signal strength of incoming beacon frames transmitted from other STAs;
- and
- a PL section configured to:
- extract multi-bit incoming PL information for each of a plurality of STAs from incoming beacon frames received from such STAs, the multi-bit incoming PL information for the incoming beacon frames corresponding to a same outgoing beacon frame from the wireless device and
- determine multi-bit outgoing PL information for at least a first STA from at least one of the incoming beacon frames;
- wherein
- the incoming beacon frames are beacon frames according to the at least one 802.11 wireless standard.
A wireless device, comprising:
- communication circuits compatible with at least one 802.11 wireless standard and configured to receive incoming beacon frames that each include an information element (IE) with path loss (PL) values for a plurality of station device (STA) pairs, each PL value corresponding to a loss in transmit (TX) power from one STA to the other STA of the STA pair, the communication circuits including
- a power control section configured to dynamically change a TX power for transmissions to a destination STA based on the PL value corresponding to such destination STA, and
- a power detection section configured to detect a received signal strength of the incoming beacon frames, the incoming beacon frames configured to be received by a plurality of STAs and the wireless device essentially simultaneously;
- and
- radio circuits configured to transmit frames to and receive frames from at least some of the plurality of STAs.
Dependencies are inferred from the claim text.