发明名称 |
Mobile positioning method for a portable communications device using shortened repetitive bursts |
摘要 |
Standard mobile cellular telephones use shortened burst signal transmissions to synchronize the transmission of a call over a cellular telephone network. These shortened bursts as well as other traffic channel bursts can be used to locate the position of the cell phone. In operation, a primary base station sends a traffic channel designation message to a selected mobile phone which then initiates selected traffic channel burst transmissions, such as shortened bursts, over an interval of five seconds or less. The primary station and at least two other neighboring base stations receive these burst transmissions and determine their respective distances from the cell phone based upon the time of arrival of the bursts or some other suitable distance related measurement. A command center determines the location of the cell phone by triangulating the distance measurements of the base stations.
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申请公布号 |
US6243588(B1) |
申请公布日期 |
2001.06.05 |
申请号 |
US19980037988 |
申请日期 |
1998.03.10 |
申请人 |
ERICSSON INC. |
发明人 |
KOORAPATY HAVISH;LUNDQVIST PATRICK NILS;RAITH ALEX KRISTER |
分类号 |
G01S5/14;G01S19/06;G01S19/25;H04W64/00;(IPC1-7):H04Q7/20 |
主分类号 |
G01S5/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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