Method, apparatus and system for determining a position of a wireless device
地域：
Stockholm
摘要
Methods and apparatuses for determining a position of a wireless device in a wireless communication network are provided. The method includes obtaining a first sequence of Time Difference of Arrivals (TDOAs) at the wireless device of reference signals, which are transmitted by and used for synchronization of a first pair of network nodes; and determining, based on the first sequence of TDOAs, a first relative distance. The method also includes obtaining a second sequence of TDOAs at the wireless device of reference signals, which are transmitted by and used for synchronization of a second pair of network nodes; and determining, based on the first sequence of TDOAs, a second relative distance. The method further includes determining the position of the wireless device based on the first and second relative distances. Corresponding computer programs and computer program carriers are also disclosed.
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This application is a 35 U.S.C. § 371 national stage application for International Application No. PCT/SE2018/050123, entitled “A METHOD, APPARATUS AND SYSTEM FOR DETERMINING A POSITION OF A WIRELESS DEVICE”, filed on Feb. 9, 2018, the disclosures and contents of which are hereby incorporated by reference in their entireties.
Embodiments herein relate to positioning of a wireless device. In particular, they relate to a method, a positioning node, a network node and a system for determining a position of a wireless device. Corresponding computer programs and computer program carriers are also disclosed.
Time and location are two basic elements of human cognition. Many future technologies will strive towards improving the information acquisition and control of these important cognitive parameters. Every fraction improvement in such efforts would lead to a plethora of life essential applications of future.
An architecture where a procedure for positioning in Long-Term Evolution (LTE) can be used is illustrated in
權(quán)利要求
The invention claimed is:1. A method performed by a positioning node for determining a position of a wireless device in a wireless communication network, the method comprising:obtaining a first sequence of Time Difference of Arrivals (TDOAs) at the wireless device of reference signals, which are transmitted by and used for synchronization of a first pair of network nodes; determining a first base offset and a first delay in response associated with the first sequence of TDOAs; determining a first relative distance d2u?d1u based on the first base offset and the first delay in response if the first delay in response is more than zero, wherein the first relative distance d2u?d1u is a difference between distances from the wireless device to each network node in the first pair; obtaining a second sequence of TDOAs at the wireless device of reference signals, which are transmitted by and used for synchronization of a second pair of network nodes; determining a second base offset and a second delay in response associated with the second sequence of TDOAs; determining a second relative distance d4u?d3u based on the second base offset and the second delay in response if the second delay in response is more than zero, wherein the second relative distance d4u?d3u is a difference between distances from the wireless device to each network node in the second pair; and determining the position of the wireless device based on the first and second relative distances d2u?d1u, d4u?d3u. 2. The method according to claim 1 , wherein the determining of the position comprises:determining the position which is consistent with both the first and second relative distances d2u?d1u, d4u?d3u. 3. The method according to claim 1 , further comprising:obtaining a minimum number of TDOAs to be measured and a rate of measuring the TDOAs for each sequence of TDOAs, from one of the network nodes which is serving the wireless device. 4. The method according to claim 1 , wherein the first and second sequences of TDOAs is obtained by receiving the first and second sequences of TDOAs from the wireless device. 5. A positioning node for determining a position of a wireless device in a wireless communication network, the positioning node is configured to:obtain a first sequence of Time Difference of Arrivals (TDOAs) at the wireless device of reference signals, which are transmitted by and used for synchronization of a first pair of network nodes; determine a first base offset and a first delay in response associated with the first sequence of TDOAs; determine a first relative distance d2u?d1u based on the first base offset and the first delay in response if the first delay in response is more than zero, wherein the first relative distance d2u?d1u is a difference between distances from the wireless device to each network node in the first pair; obtain a second sequence of TDOAs at the wireless device of reference signals, which are transmitted by and used for synchronization of a second pair of network nodes; determine a second base offset and a second delay in response associated with the second sequence of TDOAs; determine a second relative distance d4u?d3u based on the second base offset and the second delay in response if the second delay in response is more than zero, wherein the second relative distance d4u?d3u, is a difference between distances from the wireless device to each network node in the second pair; and determine the position of the wireless device based on the first and second relative distances d2u?d1u, d4u?d3u. 6. The positioning node according to claim 5 , further configured to:determine the position which is consistent with both the first and second relative distances d2u?d1u, d4u?d3u. 7. The positioning node according to claim 5 , further configured to:obtain a minimum number of TDOAs to be measured and a rate of measuring the TDOAs for each sequence of TDOAs, from one of the network nodes which is serving the wireless device. 8. The positioning node according to claim 5 , further configured to obtain the first and second sequences of TDOAs by receiving the first and second sequences of TDOAs from the wireless device.
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