METHOD OF OBTAINING TIMING INFORMATION AND METHODS OF RANGING USING SAID TIMING INFORMATION

摘要

A method of obtaining timing information between first MS and second BS devices is disclosed together with methods of ranging using said timing information and devices for the same. The method of obtaining timing information comprising the steps of transmitting a timing signal from the first device MS to the second device BS at a time t1 relative to the local clock of the first device MS and measuring the time of arrival t2 of that signal at the BS second device relative to the local clock of the second device BS; transmitting a timing signal from the second device BS to the first device MS at a time t3 relative to the local clock of the second device BS and measuring the time of arrival t4 of that signal at the first device MS relative to the local clock of the first device MS; and assembling the values of t1, t2 and t4 in one of the devices.