Method and apparatus for scanning and device detection in a communication system
First Claim
1. A method comprising:
- transmitting, from a probing device, a probe request packet directed to a listening device, the probing device configured to reserve a medium for a medium reservation period, the medium reservation period including an amount of time following the sending of the probe request packet that is greater than or equal to an amount of time needed to receive a probe response packet and less than an amount of time needed for the probing device to transmit a subsequent data packet to the listening device in a data session;
receiving, by the probing device from the listening device during the medium reservation period, a probe response packet in response to the probe request packet; and
determining, at the probing device, an existence of the listening device based on the probe response packet.
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Accused Products
Abstract
In a communication system wherein a plurality of electronic devices connect and disconnect from communication over a medium and wherein the communication system has a protocol such that it is followed by the plurality of electronic devices when using the communication system, a probing device attempts to detect presence of a listening device and parameters associated with a connection to be set up between the probing device and the listening device by sending a probe request packet directed to the listening device and sending, from the listening device, a probe response packet in response to the probe request packet, wherein the listening device bypasses at least one step of the protocol when sending the probe response packet. The bypassed step might be medium arbitration, the communication system might be a wireless network fully or partially based on an 802.11x specification, or a wireless network that uses 802.11x frame formatting and/or modifications/extensions thereof.
14 Citations
20 Claims
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1. A method comprising:
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transmitting, from a probing device, a probe request packet directed to a listening device, the probing device configured to reserve a medium for a medium reservation period, the medium reservation period including an amount of time following the sending of the probe request packet that is greater than or equal to an amount of time needed to receive a probe response packet and less than an amount of time needed for the probing device to transmit a subsequent data packet to the listening device in a data session; receiving, by the probing device from the listening device during the medium reservation period, a probe response packet in response to the probe request packet; and determining, at the probing device, an existence of the listening device based on the probe response packet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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receiving, by a listening device, a probe request packet from a probing device; and sending, by the listening device to the probing device during a medium reservation period, a probe response packet in response to the probe request packet, the probe response packet configured to enable the probing device to determine an existence of the listening device, wherein the medium reservation period is reserved by the probing device and includes an amount of time following the sending of the probe request packet that is greater than or equal to an amount of time needed to receive the probe response packet and less than an amount of time needed for the probing device to transmit a subsequent data packet to the listening device in a data session. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification