Patent US4108631A successfully refreshed from Google Patents.
EP0720407A2
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Method for monitoring the state of interference by a base station of a mobile radio communication system
Assignee: NTT Docomo Inc
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Filing: 1995-12-20
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Granted: —
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Expires: 2015-12-20
Abstract
Abstract A mobile station measures the field intensity and bit error rate of a downlink radio wave from a base station at each measurement timing and reports the measured results to the base station. Upon receiving the measured results from each mobile station, the base station compares the measured results with a reference characteristic to determine if they are abnormal or not. The base station acquires the determined results of the measured results for a fixed period of time and statistically processing them to judge the state of interference.
Inventors
- 👤 Masaaki Yoshimi
- 👤 Kiyohito Nagata
- 👤 Kazuhiko Kakinuma
- 👤 Tatsuaki Wakabayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/18; H04W24/00; H04W24/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A method for monitoring the state of interference in each zone of a mobile radio communication system wherein a mobile station in each zone performs communication via a base station of said each zone, said method comprising the steps of: (a) periodically measuring, by said mobile station, the field intensity and quality of a downlink radio wave from said base station; (b) reporting measured results from said mobile station to said base station; (c) collecting, by said base station for a predetermined period of time, said measured results reported from said mobile station and statistically processing said collected measured results into data about the state of interference; and (d) evaluating said data about said state of interference, thereby judging the state of interference between the radio wave from said base station and other radio waves of the same frequency as that of said radio wave from said base station.
Claim 2
Dependent Claim
13 words
The method of claim 1, wherein said quality if a bit error rate.
Claim 3
Dependent Claim
15 words
The method of claim 1, wherein said downlink radio wave is a downlink control channel.
Claim 4
Dependent Claim
48 words
The method of claim 1, wherein said step (b) comprises a step of requesting said mobile station from said base station to send thereto said measured results, and a step of sending said measured results from said mobile station to said base station in response to said request.
Claim 5
Dependent Claim
26 words
The method of claim 1, wherein said step (b) comprises a step of voluntarily sending said measured results from said mobile station at regular time intervals.
Claim 6
Dependent Claim
32 words
The method of claim 1, wherein said step (c) comprises a step of comparing said measured results with a predetermined reference characteristic to judge whether said measured results are abnormal or not.
Claim 7
Dependent Claim
89 words
The method of claim 6, wherein said reference characteristic is a characteristic predetermined on the basis of a characteristic representing an ideal relationship between field intensity and bit error rate, it is judged whether said measured results are abnormal, by comparing said measured results with said bit error rate defined by said reference characteristic, and the rate of the number of measured results judged as abnormal to the number of measured results collected for said predetermined period of time is used as an index indicating said state of interference.
Claim 8
Dependent Claim
137 words
The method of claim 6, wherein said reference characteristic is defined by error rate threshold values determined on the basis of an ideal characteristic indicating an ideal relationship between field intensity and bit error rate in respective intensity regions obtained by dividing field intensity, and which further comprises a step of deciding the intensity region to which said measured results belong, comparing said measured results with said threshold value of said intensity region to determine whether said measured results are abnormal or not, calculating the rate of the number of measured results determined as abnormal to the number of measured results belonging to each of said intensity region during said predetermined period of time, and weighting said rates with predetermined weighting factors, respectively, and adding said weighted rates to obtain an index indicating said state of interference.
References Cited (Backward Citations)
No citation records indexed.
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