Energy saving protocol for a TDM radio
First Claim
1. In a battery powered device operating within a time division multiplexed communication system having a communication channel arranged into repetitive time frames which include a plurality of slots, wherein each frame include at least two control slots allocated for the communication of signalling and control information, wherein said signalling and control information include a slot identification code for identifying location of each control slot within the frame, a method for operating said battery powered device comprising the steps of:
- (a) monitoring a portion of only one of said at least two control slots and detecting the slot identification code of said control slot when operating in a first mode; and
(b) monitoring a portion of each of said at least two control slots and detecting the slot identification codes of the at least two control slots when operating in a second mode.
1 Assignment
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Accused Products
Abstract
A battery powered TDM (or combined TDM/FDM) communication device (104, 105) operates within a TDM communication system (100) having a communication channel arranged into repetitive time frames (401) each having a plurality of slots. At least two of these slots (404) are allocated for communicating signalling and control information. To conserve energy, the battery powered communication device operates in a first mode (i.e., the energy saving mode) to shut down non-essential circuits for a predetermined time interval, awaking to monitor only one of the two control slots. In this way signalling and control information may be received. When not operating in the energy saving mode, the battery powered communication device operates in a second mode (i.e., a fast access mode) to monitor both of the control slots (404).
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Citations
24 Claims
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1. In a battery powered device operating within a time division multiplexed communication system having a communication channel arranged into repetitive time frames which include a plurality of slots, wherein each frame include at least two control slots allocated for the communication of signalling and control information, wherein said signalling and control information include a slot identification code for identifying location of each control slot within the frame, a method for operating said battery powered device comprising the steps of:
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(a) monitoring a portion of only one of said at least two control slots and detecting the slot identification code of said control slot when operating in a first mode; and (b) monitoring a portion of each of said at least two control slots and detecting the slot identification codes of the at least two control slots when operating in a second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In a battery powered device operating within a time divisin multiplexed communication system having a communication channel arranged into repetitive time frames which include a plurality of slots, wherein each frame includes at least two control slots allocated for the communication of signalling and control information, wherein said signalling and control information include a slot identification code for identifying location of each control slot within the frame, a method for operating said battery powered device comprising the steps of:
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(a) monitoring a portion of only one of said at least two control slots and detecting the slot identification code of said control slot while deactivating non-essential circuits during each remaining slot when operating in a first mode; (b) monitoring a portion of each of said at least two control slots and detecting the slot identification codes of the at least two control slots while inactivating non-essential circuits during each remaining slot when operating in a second mode; and
,(c) adapting between said first mode and said second mode in response to a control signal.
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15. A battery powered communication device being capable of conserving energy by functioning in one of two operational modes while operating within a time division multiplexed communication system having a communication channel arranged into repetitive time frames which include a plurality of slots, wherein each frame includes at least two control slots allocated for the communication of signalling and control information, wherein said signalling and control information include a slot identification code for identifying location of each control slot within the frame, said device comprising:
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means for monitoring only a portion of one of said at least two control slots and detecting the slot identification code of said control slot when operating in a first mode; and means for monitoring a portion of each of said at least two control slots and detecting the slot identification codes of the at least two control slots when operating in a second mode. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A battery powered communication device being capable of conserving energy by functioning in one of two operational modes while operating within a time division multiplexed communication system having a communication channel arranged into repetitive time frames which include a plurality of slots, wherein each frame includes at least two control slots allocated for the communication of signalling and control information, wherein said signalling and control information include a slot identification code for identifying location of each control slot within the frame, said device comprising:
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receiving means for receiving information from one or more of the plurality of time slots; means for monitoring only a portion of one of said at least two control slots and detecting the slot identification code of said control slot when operating in a low power or energy saving mode; means for monitoring a portion of each of said at least two control slots and detecting the slot identification codes of the at least two control slots when operating in a higher power mode; control means for controlling the battery powered communication device to operate in the energy saving mode or the higher power mode in response to a control signal.
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24. In a battery powered device operating within a time division multiplexed communication system having a communication channel arranged into repetitive time frames which include a plurality of slots, wherein each frame includes at least two non-contiguous control slots allocated for the communication of signalling and control information, wherein said signalling and control information include a slot identification code for identifying location of each control slot within the frame, a method for operating said battery powered device comprising the steps of:
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(a) monitoring a portion of only one of said at least two control slots and detecting the slot identification code of said control slot when operating in a first mode; and (b) monitoring a portion of each of said at least two control slots and detecting the slot identification codes of the at least two control slots when operating in a second mode.
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Specification