Patent EP0255048A2 successfully refreshed from Google Patents.
EP0255048A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Portable radio telephone having power saver
Assignee: NEC Corp
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Filing: 1987-07-23
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Granted: —
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Expires: 2007-07-23
Abstract
Abstract A battery-powered portable radio telephone for use in a mobile telephone network receives signals from the network and judges from the received signal whether the radio telephone is inside or outside of the service area of the network. A battery saver is provided to periodically interrupt the battery power of the telephone when the latter is judged as being outside of the service area.
Inventors
- 👤 Yoshihiko C/O Nec Corporation Kasai
- 👤 Sotoaki C/O Nec Corporation Babano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 12:56
CPC Classifications
H; H04; H04M; H04M19/00; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0225; H04W52/0241; H04B; H04B1/00; H04B1/06; H04B1/16; H04M1/00; H04M1/72; H04M1/725; H04M1/73; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
73 words
A battery-powered portable radio communication unit for use in a mobile telecommunication network having a service area, comprising: processing means for receiving a signal from said network and judging from the received signal whether said radio communication unit is inside or outside of said service area; and battery saving means for periodically interrupting the battery power of said communication unit when said communication unit is judged as being outside of said service area.
Claim 2
Dependent Claim
73 words
A battery-powered portable radio communication unit for use in a mobile telecommunication network having a service area, comprising: processing means for receiving a signal from said network and judging from the received signal whether said radio communication unit is inside or outside of said service area; and battery saving means for periodically interrupting the battery power of said communication unit when said communication unit is judged as being outside of said service area.
Claim 3
Dependent Claim
61 words
A battery-powered portable radio communication unit as claimed in claim l, further comprising means for causing said battery saving means to effect the periodic interruption of said battery power upon termination of a prescribed time interval (Td) immediately following the judgment of said communication unit as being outside of said service area and causing said processing means to make said judgment.
Claim 4
Dependent Claim
47 words
A battery-powered portable radio communication unit as claimed in claim l or 2, further comprising second battery saving means for periodically interrupting said battery power when said communication unit is judged as being inside of said service area when said communication unit is in a standby mode.
Claim 5
Dependent Claim
35 words
A battery-powered portable radio communication unit as claimed in claim 3, wherein the periodic interval (T3) of said second battery saving means is smaller than the periodic interval (Tl) of the first-mentioned battery saving means.
Claim 6
Dependent Claim
96 words
A battery-powered portable radio communication unit as claimed in claim 3 or 4, further comprising third battery saving means for periodically interrupting said battery power during a prescribed time interval (T6) immediately following the judgment of said communication unit as being inside of said service area, and means for causing said processing means to make the judgment during periods in which said battery power is not interrupted by said third battery saving means, the periodic interval (T5) of said third battery saving means being smaller than the periodic interval (T3) of said second battery saving means.
Claim 7
Dependent Claim
92 words
A battery-powered portable radio communication unit as claimed in any of claims l to 5, wherein said processing means comprises: means for detecting the strength of the received signal; and means for determining whether the strength of the signal is higher or lower than a prescribed value representing the boundary of said service area, and wherein said battery saving means effects the interruption of the battery power of said communication unit when said strength is determined as being lower than said prescribed value and said communication unit is in a standby mode.
Claim 8
Dependent Claim
51 words
A battery-powered portable radio communication unit as claimed in claim 6, further comprising means for causing said battery saving means to effect the periodic interruption of said battery power upon termination of a prescribed time interval (Td) immediately following the determination of said strength as being lower than said prescribed value.
Claim 9
Dependent Claim
36 words
A battery-powered portable radio communication unit as claimed in claim 6 or 7,further comprising second battery saving means for periodically interrupting said battery power when said strength is determined as being higher than said prescribed value.
Claim 10
Dependent Claim
93 words
A battery-powered portable radio communication unit as claimed in claim 8, further comprising third battery saving means for periodically interrupting said battery power during a prescribed time interval (T6) immediately following the determination of said strength as being lower than said prescribed value and means for causing said determining means to make the determination during periods in which the battery power is not interrupted by said third battery saving means, the periodic interval (T5) of said third battery saving means being smaller than the periodic interval (T3) of said second battery saving means.
Claim 11
Dependent Claim
128 words
l0. A battery-powered portable radio communication unit as claimed in any of claims l to 9, wherein said service area is divided into cells having cell sites, and wherein said processing means comprises: means for receiving signals from said cell sites and selecting a channel from one of the cell sites having a strongest signal; means for detecting the strength of the signal of said selected channel; and means for determining whether the detected strength is higher or lower than a prescribed value representing the boundary of said service area, wherein said battery saving means effects the interruption of the battery power of said communication unit when said detected strength is determined as being lower than said prescribeds value and said communication unit is in a standby mode.
Claim 12
Independent Claim
143 words
A method for saving the battery power of a portable communication unit for use in a mobile telecommunication network having a service area, said service area being divided into cells having cell sites, comprising the steps of: a) receiving signals from said cell sites and selecting a channel from one of the cell sites having a strongest signal level; b) detecting the strength of the signal of said selected channel; c) determining whether the strength of the signal is higher or lower than a prescribed value representing the boundary of said service area; d) if said strength is determined as being lower than said prescribed value, interrupting the battery power during a prescribed interval (Tl) and then repeating the steps (a) to (c); and e) if said strength is determined as being higher than said prescribed value, repeating the steps (a) to (c).
Claim 13
Independent Claim
143 words
A method for saving the battery power of a portable communication unit for use in a mobile telecommunication network having a service area, said service area being divided into cells having cell sites, comprising the steps of: a) receiving signals from said cell sites and selecting a channel from one of the cell sites having a strongest signal level; b) detecting the strength of the signal of said selected channel; c) determining whether the strength of the signal is higher or lower than a prescribed value representing the boundary of said service area; d) if said strength is determined as being lower than said prescribed value, interrupting the battery power during a prescribed interval (Tl) and then repeating the steps (a) to (c); and e) if said strength is determined as being higher than said prescribed value, repeating the steps (a) to (c).
Claim 14
Independent Claim
22 words
A method as claimed in claim ll, further comprising the step of introducing a delay time between the steps (c) and (d).
Claim 15
Independent Claim
46 words
A method as claimed in claim ll or l2, wherein the step (e) comprises the step of interrupting said battery power during a second prescribed interval if said strength is determined as being higher than said prescribed value prior to repeating the steps (a) to (c).
Claim 16
Independent Claim
19 words
A method as claimed in claim l3, wherein said second prescribed interval is smaller than the first-mentioned prescribed interval.
Claim 17
Independent Claim
59 words
A method as claimed in claim l4, wherein the step (d) comprises: dl) interrupting said battery power during a third prescribed interval (T5) smaller than said second prescribed interval (T3); and d2) repeating the steps (a) to (c) and (dl) for a predetermined interval (T6) prior to the interruption of the battery power during the first-mentioned prescribed interval (Tl).
References Cited (Backward Citations)
No citation records indexed.
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