Method and system for enabling device functions based on distance information

• US 7,058,414 B1
• Filed: 10/10/2000
• Issued: 06/06/2006
• Est. Priority Date: 05/26/2000
• Status: Expired due to Fees

• Current Assignee: North Star Innovations Inc. (Wi-LAN Inc.)
• Original Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Inventors: Rofheart, Martin, McCorkle, John W.
• Primary Examiner(s): Hudspeth, David
• Assistant Examiner(s): Nguyen, Huy D
• Application Number:
  US09/685,202
• Time in Patent Office: 2,065 Days
• Field of Search: 455/421, 455/456.1, 455/456.4, 455/67.16, 455/456.2, 455/456.3, 455/456.5, 455/456.6, 455/457, 340/539.1, 340/539.11, 340/539.13, 342/453, 342/463, 342/464, 342/465
• US Class Current: 455/456.4
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 7/023 Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04J 3/0682 by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 27/0004 using wavelets
• CPC Class Codes: H04L 63/0492 by using a location-limited connection, e.g. near-field communication or limited proximity of entities
• CPC Class Codes: H04W 12/63 Location-dependent; Proximity-dependent
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

A method, device and computer readable medium for enabling and blocking communications with a remote device based on a distance of the remote device. The method on which the device and computer readable medium are based includes transmitting a message from a local device to a remote device via an ultra wide band (UWB) wireless medium and receiving a response from the remote device via the UWB wireless medium. The transmitting and receiving steps are preferably performed in accordance with a Media Access Control (MAC) protocol. A distance between the local device and the remote device is then determined based on a time between the transmitting of the message and the receiving of the response and a function, such as communicating with the remote device, is performed in the local device based on the distance determined. The communication between the local device and the remote device may be enabled or disabled depending on the distance that the remote device is from the local device. In addition, the distance information for a remote device may be continually updated, or updated only if communication to the remote device are blocked. A positional map may be generated based on distance data determined for a plurality of reference points and the user may select the remote device from the positional map to enable communications to the positional map.

Claims

1. A method for using timing information as at least one input parameter for a function performed in a local device comprising steps for:

transmitting a message from the local device to a remote device via an ultra wide band (UWB) wireless medium;

receiving a response from said remote device via said UWB wireless medium;

determining an amount of time between said transmitting step being executed and said receiving step being executed;

performing a function in said local device with said amount of time being said at least one input parameter; and

determining a distance from said local device to said remote device based on said amount of time,

wherein said step of performing a function in said local device comprises performing said function based on said distance determined,

wherein said step of performing a function in said local device comprises communicating with said remote device based on said distance determined, and

wherein said step of communicating with said remote device comprises substeps of;

setting an authentication criteria in said local device;

comparing said authentication criteria with said distance between the local device and the remote device;

enabling communications with said remote device if said distance satisfies said authentication criteria; and

blocking communications with said remote device if said distance does not satisfy said authentication criteria.

2. The method of claim 1, further comprising steps of:

updating distance information after a predetermined time; and

enabling or disabling communications to said remote device based on the updated distance information.

3. The method of claim 1, further comprising steps of:

updating distance information only when communications to said remote device are blocked; and

enabling communications with said remote device based on the updated distance information.