Abstract
In a mobile radio telephone system employing TDMA or CDMA, mobile units often must determine the timing and appropriate power necessary for transmissions to a base station. Information broadcast by base stations allows the mobile station to approximate its distance from each base station based on an average signal strength received and thereby determine the coarse sector location. Broadcast information may include the mean radial distribution of signal strength versus distance. From the broadcast information, the mobile station determines the propagation loss for a transmission to the base station and the appropriate power level and timing for transmissions. Accordingly, the mobile station transmits signals to the base station at the determined signal timing and power level.
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| Not Available | 21/10/1998 | ISLD-190001-020 | ERICSSON INC | No | Family Member | ||||
| Not Available | 21/10/1998 | ISLD-190001-060 | RESEARCH IN MOTION LTD | No | Family Member | ||||
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SEP Database
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | |||||||
| US5670964A | Not Available | 21/10/1998 | ISLD-190001-020 | ERICSSON INC |
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| US5670964A | Not Available | 21/10/1998 | ISLD-190001-060 | RESEARCH IN MOTION LTD |
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Yes | Basis Patent | |||
| US5670964A | 4G | 10/11/2010 | ISLD-201011-017 | RESEARCH IN MOTION LTD |
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| US5404376A | Not Available | 21/10/1998 | ISLD-190001-020 | ERICSSON INC |
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Yes | Basis Patent | |||
| US5404376A | Not Available | 21/10/1998 | ISLD-190001-060 | RESEARCH IN MOTION LTD |
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| US5404376A | 4G | 10/11/2010 | ISLD-201011-017 | RESEARCH IN MOTION LTD |
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| KR950704892A | ----- | ----- | ----- | ----- | ----- | ----- | ----- | |||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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