Patent EP0536099A1 successfully refreshed from Google Patents.
EP0536099A1
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EP
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A method for avoiding an unnecessarily high energy consumption in mobile stations of a mobile telephone system
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1992-09-11
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Granted: —
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Expires: 2012-09-11
Abstract
Abstract A method for avoiding an unnecessarily high energy consumption of mobile stations which are included in a digital time-multiplex mobile telephony system. In an idle mode, each of the mobile stations normally listens on only each Nth time slot of a channel which, among other things, is intended for the transmission of paging messages, e.g. the CCCH-channel in GSM. In order to reduce the time of establishing a call connection, the system includes the possibility of applying a so-called extended page mode, wherein a time slot, e.g. time slot N, may contain information instructing the mobile stations to listen also on an additional time slot, e.g. time slot N+2. According to the invention, the extended page mode can be applied significantly with regard to time gain and increased energy consumption, in the following manner : There is decided a percentage which corresponds to a maximum value for the percentage of paging messages that may be transmitted in the extended page mode. A decision is then reached as to whether an extended page mode is used, depending, in each separate case, whether or not there is a need for an extended page mode, whether or not the additional time slot has a free space, and whether or not the percentage decided has been exceeded.
Inventors
- 👤 Lars Magnus Lindroth
- 👤 Georg William Robin Chambert
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 12:53
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0216; H04W52/0219; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
263 words
A method for avoiding unnecessarily high energy consumption of mobile stations included in a digital time-multiplex mobile telephony system, in which each of the mobile stations, in an idle mode, normally listens on only each Nth time slot of a channel which is at least partially intended for transmitting mobile station paging messages, e.g. the CCCH-channel in GSM, and in which it is possible to permit each such time slot (N) to contain control information which instructs the mobile stations also to listen on a further time slot, an additional time slot (N+2), of said channel, this additional time slot appearing after a predetermined number of time slots, characterized in that the decision to permit a given time slot (N) to contain said control information is reached in accordance with the following procedural steps: a) deciding (11) a percentage corresponding to a maximum value for the percentage of messages which may contain said control information; b) ascertaining (12) whether or not there is a need for said given time slot (N) to contain said control information; c) ascertaining (13) whether or not the additional time slot (N+2) contains a free space; d) ascertaining (14) whether or not the percentage has been exceeded for said given time slot (N); and in that a decision (15) that said given time slot (N) shall contain said control information is reached when a need according to b) is found, when, at the same time, a free place is found according to c), and when, at the same time, the percentage according to d) has not been exceeded.
Claim 2
Independent Claim
263 words
A method for avoiding unnecessarily high energy consumption of mobile stations included in a digital time-multiplex mobile telephony system, in which each of the mobile stations, in an idle mode, normally listens on only each Nth time slot of a channel which is at least partially intended for transmitting mobile station paging messages, e.g. the CCCH-channel in GSM, and in which it is possible to permit each such time slot (N) to contain control information which instructs the mobile stations also to listen on a further time slot, an additional time slot (N+2), of said channel, this additional time slot appearing after a predetermined number of time slots, characterized in that the decision to permit a given time slot (N) to contain said control information is reached in accordance with the following procedural steps: a) deciding (11) a percentage corresponding to a maximum value for the percentage of messages which may contain said control information; b) ascertaining (12) whether or not there is a need for said given time slot (N) to contain said control information; c) ascertaining (13) whether or not the additional time slot (N+2) contains a free space; d) ascertaining (14) whether or not the percentage has been exceeded for said given time slot (N); and in that a decision (15) that said given time slot (N) shall contain said control information is reached when a need according to b) is found, when, at the same time, a free place is found according to c), and when, at the same time, the percentage according to d) has not been exceeded.
Claim 3
Dependent Claim
30 words
Amethod according to Claim 1, characterized by ascertaining whether or not the percentage has been exceeded by calculating a moving average value and comparing this average value with the percentage.
Claim 4
Dependent Claim
30 words
Amethod according to Claim 1, characterized by ascertaining whether or not the percentage has been exceeded by applying a leaky-bucket-method, and by comparing a value calculated thereby with the percentage.
Claim 5
Dependent Claim
172 words
A method according to Claim 1, characterized in that when no free space is found in the additional time slot (N+2), the process of reaching said decision also includes the following procedural steps: e) ascertaining (17) whether or not a free space is found in still another time slot, a second additional time slot (N+4) of said channel, said second additional time slot appearing a predetermined number of time slots after the first mentioned additional time slot (N+2); f) ascertaining (18) whether or not said first additional time slot (N+2) contains a non-priority message; and in that a decision (15) to the effect that said given time slot (N) shall contain said control information is reached when a need according to b) is found, when, at the same time, a free space according to e) is found in said second additional time slot, when, at the same time, at least one non-priority message according tof) is found, and when, at the same time, the percentage according to d) has not been exceeded.
Claim 6
Independent Claim
71 words
A method according to any one of Claims 1-4, characterized in that the percentage decided is dependent on the geographical region in which the mobile stations are located; and in that the percentage is decided in a manner such as to be higher in those regions in which there is probably found relatively few hand-carried mobile stations than in those regions in which relatively many hand-carried mobile stations are probably found.
References Cited (Backward Citations)
EP0375067A1
Cited
EP0443516A2
Cited
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