Extended Slot Cycle Index for Wireless Device Battery Life
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Solution Overview
Problem
Current wireless communication systems restrict wireless devices to short sleep cycles due to limited slot cycle index values, forcing them to wake up frequently and reducing battery life, especially in applications like M2M services where longer sleep periods are necessary.
Innovation Solution
The introduction of an extended slot cycle index field in system parameter messages and registration messages allows wireless devices to set longer sleep periods, up to 31 days, by adding a new field (EXT_MAX_SLOT_CYCLE_INDEX and EXT_SLOT_CYCLE_INDEX) to support longer slot cycles while maintaining backward compatibility with legacy devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the slot cycle index is limited to traditional values, then the system maintains backward compatibility with legacy devices, but wireless devices are forced to wake up frequently, reducing battery life
Solution Approach 1:
The patent introduces a new dimension to the slot cycle index by adding an extended field (EXT_SLOT_CYCLE_INDEX) that allows values beyond the traditional range. This dimensional expansion enables sleep cycles up to 31 days while preserving the original slot cycle index structure for backward compatibility, effectively solving the contradiction between extended battery life and system adaptability.
2Use of energy by moving object
If the sleep cycle duration is extended to prolong battery life, then wireless devices can sleep longer, but the system must accommodate both legacy and extended slot cycle indices, increasing message complexity
Solution Approach 1:
The patent segments the slot cycle index into two distinct fields: the original SLOT_CYCLE_INDEX for legacy compatibility and the new EXT_SLOT_CYCLE_INDEX for extended durations. This segmentation allows the system to handle both short and long sleep cycles independently, reducing the complexity burden on any single field while achieving overall battery efficiency improvement.
Solution Approach 2:
The extended slot cycle index field is nested within the existing control message structure as an optional element. When present, it provides extended functionality; when absent, the original message structure is maintained. This nesting approach allows the system to accommodate both legacy and enhanced devices without forcing complexity on all message exchanges.
3Adaptability or versatility
If different slot cycle indices are enabled for individual wireless devices, then customized sleep periods can be assigned, but the network must manage and track multiple index values, increasing network operation complexity
Solution Approach 1:
The patent applies local quality by allowing each wireless device to have its own customized EXT_SLOT_CYCLE_INDEX value assigned by the network. This per-device customization enables optimal battery life configuration for each device based on its specific requirements, while the network manages these individual values through targeted messaging rather than global reconfiguration, reducing overall management overhead.
Data Source
AI summary
Methods, apparatus and systems for enhanced slotted mode operation for wireless communication are disclosed. A first control message indicative of a first sleep cycle duration is received. When the first control message includes a first message field, a second control message that includes a second field indicative of a second sleep cycle duration that is greater than the first sleep cycle duration is transmitted.