Battery saver for a TDM system
First Claim
1. In a time division multiplexed communication system capable of synchronously communicating message signals between a communication resource controller and at least one remote communication unit having a means for reducing power consumption;
- a method for reducing power consumption in said communication unit, comprising the steps of;
(a) attempting to acquire synchronization during a synchronization acquisition interval;
(b) entering an asynchronous battery saving mode, when synchronization is not acquired, including the step of;
(i) reducing power consumption for a variable asynchronous power saving interval;
(c) entering a synchronous power saving mode when synchronization is acquired including the steps of;
(i) detecting a call request between said communication resource controller and said communication unit,(ii) reducing power consumption for a synchronous power saving interval when said call request is not detected,(iii) verifying synchronization presence during a synchronization verification interval;
(d) entering said asynchronous battery saving mode when synchronization is lost.
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Accused Products
Abstract
A power saving method and apparatus in a time division multiplexed system (10) capable of providing a synchronous full duplex communication between a telephone network (12) and a plurality of remote communication units (18). A communication resource controller (14) provides system synchronization, by periodically trnsmitting synchronization messages through one or more remote sites (11). The communication units (18) attempt to acquire synchronization during a synchronization acquisition interval. If synchronization is acquired, the communication units (18) enter a synchronous battery saving mode (515). In the synchronous battery saving mode (515), the communication units (18) can detect a call request either to their own address or to the address of another communication unit. If no call request is detected, the communication units (18) reduce power consumption for a synchronous power saving time interval, and thereafter merely verify synchronization. However, if synchronization is not acquired, the communication units enter an asynchronous power saving mode (525), wherein they reduce power consumption for an asynchronous power saving interval. The communication units (18) may enter the asynchronous battery saving mode (505), if a call request to another communication unit is detected. The asynchronous power saving interval is substantially longer than synchronous power saving interval.
200 Citations
23 Claims
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1. In a time division multiplexed communication system capable of synchronously communicating message signals between a communication resource controller and at least one remote communication unit having a means for reducing power consumption;
- a method for reducing power consumption in said communication unit, comprising the steps of;
(a) attempting to acquire synchronization during a synchronization acquisition interval; (b) entering an asynchronous battery saving mode, when synchronization is not acquired, including the step of; (i) reducing power consumption for a variable asynchronous power saving interval; (c) entering a synchronous power saving mode when synchronization is acquired including the steps of; (i) detecting a call request between said communication resource controller and said communication unit, (ii) reducing power consumption for a synchronous power saving interval when said call request is not detected, (iii) verifying synchronization presence during a synchronization verification interval; (d) entering said asynchronous battery saving mode when synchronization is lost. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a method for reducing power consumption in said communication unit, comprising the steps of;
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9. In a time division multiplexed communication system capable of synchronously communicating message signals between a communication resource controller and at least one remote communication unit having a means for reducing power consumption;
- a method for saving power consumption in said communication unit, comprising the steps of;
(a) verifying synchronization pressence during a synchronization verification interval; (b) entering a synchronous battery saving mode, when synchronization presence is verified, comprising the steps of; (i) detecting a call request between said communication resource controller and said communication unit, (ii) reducing power comsumption for a synchronous power saving interval when said call request is not detected; (c) entering an asynchronous battery saving mode, when synchronization presence is not verified, comprising the steps of; (i) reducing power consumption for a variable asynchronous power saving interval, (ii) attempting to acquire synchronization during a synchronization acquisition interval; (d) entering said asynchronous battery saving mode when synchronization is lost. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- a method for saving power consumption in said communication unit, comprising the steps of;
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17. In a time division multiplexed communication system capable of synchronously communicating message signals between a communication resource controller and at least one remote communication unit, said communicating unit comprising:
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a controller means for controlling the operation of said communication unit, a verification means for verifying synchronization presence, an acquisition means for acquiring synchronization; a power reduction means for reducing power consumption when enabled by said controller; said controller enabling said power reduction means for a synchronous power saving interval, when synchronization is verified during a variable synchronization verification interval, said controller means enabling said power reduction means for a first variable asynchronous power saving interval, when synchronization is not acquired during a synchronization acquisition interval. - View Dependent Claims (18, 19, 20)
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21. In a time division multiplexed communication system capable of synchronously communicating message signals between a communication resource controller and at least one remote communication unit having a means for reducing power consumption, a method for reducing power consumption in said communication unit, comprising the steps of:
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(a) attempting to acquire synchronization during a synchronization acquisition interval, (b) entering an asynchronous battery saving mode, when synchronization is not acquired, including the steps of; (i) determining elapsed time with reference to a established time reference within said asynchronous battery saving mode, (ii) reducing power consumption for an asynchronous power saving interval, wherein said varible asynchronous power saving being a function of said elapsed time in said asynchronous battery saving mode. (c) entering a synchronous power saving mode when synchronization is acquired including the steps of; (i) estimating system utilization from said message signals, (ii) reducing power consumption for a synchronous power saving interval, said variable power saving interval being a of function of estimated system utilization. - View Dependent Claims (22, 23)
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Specification