System and method of position location transfer

A position location method comprising:

• defining a group of at least four wireless devices;
• obtaining a position of a first wireless device in the group of wireless devices;
• obtaining range measurements for each pair of devices in the group of wireless devices;
• and
• determining a position for at least one wireless device in the group of wireless devices other than the first wireless device using the position of the first wireless device and the range measurements.

A position location method, comprising:

• forming a group of wireless devices in which the number of devices varies according to the number of coordinates selected for defining their respective positions;
• obtaining range measurements for each combination of two wireless devices in the group of wireless devices;
• obtaining position data for a first wireless device in the group of wireless devices;
• and
• determining a position for at least one wireless device other than the first wireless device using the position data and the range measurements.

A position location apparatus comprising:

• means for defining a group of at least four wireless devices;
• means for obtaining a position of a first wireless device in the group of wireless devices;
• means for obtaining range measurements for each pair of devices in the group of wireless devices;
• and
• means for determining a position for at least one wireless device in the group of wireless devices other than the first wireless device using the position of the first wireless device and the range measurements.

A computer-readable medium carrying one or more sequences of one or more instructions for locating the position of wireless devices, the one or more sequences of one or more instructions including instructions which, when executed by one or more processors, cause the one or more processors to perform steps of:

• defining a group of at least four wireless devices, including a first wireless device for which a position is available and second wireless devices for which positions are not available;
• obtaining range measurements for each pair of wireless devices in the group of at least four wireless devices;
• obtaining the position of the first wireless device;
• and
• determining a position of at least one of the second wireless devices using the range measurements and the position of the first wireless device.