发明名称 |
METHOD FOR ESTIMATING SPEED OF A MOBILE STATION IN A CELLULAR COMMUNICATIONS SYSTEM |
摘要 |
A method is provided for accurately estimating the speed of mobile stations in a cellular communications system. Taking into account the Doppler shift of the information in a received burst, a frequency offset value is calculated for each received burst. For each burst, a signal quality value is calculated, which is compared with a predetermined signal quality threshold level. The absolute value of each of the frequency offset values whose signal quality value meets or exceeds the predetermined signal quality threshold is obtained. The frequency offset values whose signal quality values do not meet the threshold level ar e disregarded. The total mean of all of the absolute frequency offset values is then calculated. The total mean value is used to accurately estimate the speed of the mobile station. Consequently, the speed of faster and slower mobile stations can be readily distinguished, and a hierarchical cell structure can be effectively used to increase capacity and reduce handovers in a cellular communications system.
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申请公布号 |
CA2271802(C) |
申请公布日期 |
2007.04.10 |
申请号 |
CA19972271802 |
申请日期 |
1997.11.27 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
BJORK, PETER;ERICSSON, LINUS |
分类号 |
H04B7/26;H04Q7/22;G01S11/10;H04Q7/32;H04Q7/38 |
主分类号 |
H04B7/26 |
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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