EP0660627A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Multi-mode radio telephone
Assignee: Nokia Oyj
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Filing: 1994-11-30
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Granted: —
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Expires: 2014-11-30
Abstract
Abstract A radio telephone (200) is operable in a cordless telephone system or in a cellular telephone system. The telephone (200) incorporates circuitry to detect user velocity so that when the user travels more quickly the telephone automatically transfers from cordless mode, which is the preferred mode, to cellular mode. This prevents the degeneration in communication quality which frequently occurs when a user of a cordless system travels faster than walking pace.
Inventors
- 👤 John Daniel Byrne
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 04:38
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/06; H04W36/00; H04W36/14; H04W36/142; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W84/045
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
A radio telephone operative in at least two radio telephone systems, the radio telephone comprising communication means respectively associated with each of the radio telephone systems, sensing means for sensing the velocity of movement of the radio telephone and selection means responsive to the sensing means for selecting one of respective said communication means for the said telephone systems in dependence, wholly or partially, on the sensed velocity.
Claim 2
Dependent Claim
43 words
A radio telephone according to claim 1, wherein the telephone systems are a micro-cellular telephone system and a macro-cellular telephone system respectively, the selection means selecting the micro-cellular system when the velocity is low and the macro-cellular system when the velocity is high.
Claim 3
Dependent Claim
29 words
A radio telephone according to claim 2, wherein the sensing means are operative to sense velocity by sensing the rate at which the radio telephone moves across cell boundaries.
Claim 4
Dependent Claim
47 words
A radio telephone according to claim 3, wherein said rate is sensed by sensing the rate at which handover events, or attempted handover events, occur, a handover event being the transference of a radio telephone from one cell to an adjacent cell in the same telephone system.
Claim 5
Dependent Claim
60 words
A radio telephone according to claim 3 or claim 4, wherein the selection means comprise storage means having stored therein a threshold handover count, comparator means for comparing a prevailing handover count with the threshold count, the selection means being operative to initiate changeover from the micro-cellular system to the macro-cellular system if the prevailing count exceeds the threshold count.
Claim 6
Dependent Claim
38 words
A radio telephone according to claim 2, wherein the sensing means are operative to sense velocity by sensing the Doppler shift imparted to the signal received by the telephone as a consequence of the movement of the telephone.
Claim 7
Dependent Claim
41 words
A radio telephone according to claim 2, wherein the telephone systems have networks with which the telephone communicates and at least one network has means for detecting radio telephone velocity and for transmitting information regarding said velocity to the radio telephone.
Claim 8
Dependent Claim
33 words
A radio telephone according to claim 2, wherein the selection means are operative to determine the variation in strength of a signal received by the radio telephone, in order to sense user velocity.
Claim 9
Dependent Claim
31 words
A radio telephone according to claim 8, wherein the selection means determine the rate of change with time of the strength of the received signal, in order to sense user velocity.
Claim 10
Dependent Claim
81 words
A radio telephone according to claim 9, wherein the selection means comprise averaging means operative to determine average values of the received signal over successive predetermined time intervals, difference means operative to compare the averaged value with a preceding averaged value to determine a difference value, comparator means operative to compare the difference with a predetermined difference and to initiate transfer to the macro-cellular system if the prevailing difference value exceeds the predetermined difference value by more than a predetermined threshold.
Claim 11
Dependent Claim
62 words
In combination, a micro-cellular telephone system, a macro-cellular telephone system and at least one radio telephone capable of operating in either system, the combination comprising sensing means for sensing the velocity of movement of the radio telephone and selection means responsive to the sensing means for automatically selecting the macro-cellular telephone system when the velocity of the radio telephone exceeds a threshold.
Claim 12
Independent Claim
36 words
A method of operating a radio telephone operative in at least two radio telephone systems, comprising selecting a said radio telephone system in dependence, wholly or partially, on the velocity of movement of the radio telephone.
Claim 13
Dependent Claim
42 words
A method according to claim 12, wherein the telephone systems are a micro-cellular telephone system and a macro-cellular telephone system respectively, the micro-cellular system being selected when the velocity is low and the macro-cellular system being selected when the velocity is high.
Claim 14
Dependent Claim
26 words
A method according to claim 13, wherein the velocity of movement is determined by sensing the rate at which the radio telephone moves across cell boundaries.
Claim 15
Dependent Claim
37 words
A method according to claim 13, wherein the velocity of movement is determined by sensing the Doppler shift imparted to the signal received by the radio telephone as a consequence of the movement of the radio telephone.
Claim 16
Dependent Claim
36 words
A method according to claim 13, wherein the telephone systems have networks with which the radio telephone communicates, and at least one network detects radiotelephone velocity and transmits information regarding said velocity to the radio telephone.
References Cited (Backward Citations)
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