Patent ID: 8489098

Claim:
A method of providing real time difference determination for a mobile terminal in a telecommunication system, said system comprising a plurality of eNodeBs in communication with a core network, each eNodeB having a plurality of associated cells, each cell potentially servicing one or more mobile terminals, said method comprising: determining a first timing advance value representative of a first geographical distance measure between said mobile terminal and a first serving eNodeB prior to a handover to a second serving eNodeB; determining a second timing advance value representative of a second geographical distance measure between said mobile terminal and said second eNodeB after said handover; determining at least a time of arrival measure between said mobile terminal and at least two of the plurality of eNodeBs; and signalling representations of said first and second geographical distance measures and said determined time of arrival measures for said mobile terminal to at least said second eNodeB, together with a respective unique identification parameter of said at least two eNodeBs, to enable determination of real time differences based on at least said signalled representations.