Adaptive Paging Code Rate and Power Control
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Solution Overview
Problem
In LTE wireless communication networks, existing paging methods are wasteful of radio resources as they assume poor link conditions for all devices, leading to unnecessary robust coding and high transmit power, even for devices with good radio conditions, resulting in coverage holes and resource wastage.
Innovation Solution
A method where network nodes determine a code rate and transmit power for paging messages based on the location in a sequence of messages, adjusting robustness accordingly to ensure successful delivery while minimizing resource usage, by using more robust coding and power for subsequent messages if initial ones are not sufficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust coding and high transmit power are used for all paging messages, then reliability of paging delivery is improved, but radio resource wastage increases
Solution Approach 1:
The patent applies local quality by differentiating the coding and transmit power settings based on the specific radio conditions of the wireless device. Instead of uniformly applying robust coding and high power to all paging messages, the system adapts the coding rate and power level to match the actual channel quality indicator (CQI) of the target device, ensuring reliable delivery only where necessary.
Solution Approach 2:
The patent implements dynamics by making the coding rate and transmit power adjustable and adaptive rather than fixed. The system dynamically selects appropriate coding and power levels based on real-time CQI feedback from wireless devices, allowing the paging mechanism to respond to changing radio conditions and optimize resource usage accordingly.
2Reliability
If robust coding is used for all devices, then coverage holes are reduced, but resource efficiency deteriorates
Solution Approach 1:
The patent applies local quality by customizing the paging message coding and power settings according to the specific radio conditions of each wireless device. Devices with poor radio conditions (low CQI) receive paging messages with more robust coding and higher power, while devices with good conditions receive less robust but more resource-efficient paging messages.
Solution Approach 2:
The patent implements parameter changes by varying the coding rate and transmit power parameters based on the CQI values reported by wireless devices. The system adjusts these parameters dynamically to match the actual channel quality, ensuring adequate coverage for devices in poor conditions without wasting resources on devices in good conditions.
3Reliability
If high transmit power is used for all paging messages, then paging success rate is improved, but energy consumption increases
Solution Approach 1:
The patent applies local quality by setting transmit power levels according to the specific radio conditions of each target wireless device. Instead of using high power for all paging messages, the system determines appropriate power levels based on CQI measurements, applying high power only when necessary to reach devices in poor coverage areas.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the transmit power parameter based on CQI feedback. The base station modifies the power level for each paging message according to the actual channel conditions, reducing energy consumption while maintaining adequate paging success rates for all devices.
Data Source
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AI summary
Managing of paging of a wireless device (120). A first network node of a wireless communication network (100) determines (203; 301) a code rate and/or transmit power for a present paging message based on a location in a sequence of paging messages. The location is associated with the present paging message. The first network node transmits (204; 302) the present paging message targeted for receipt by the wireless device (120). The present paging message commands the wireless device (120) to connect, or at least initiate connection, to the wireless communication network (100). The present paging message is being coded based on the determined code rate and/or being transmitted based on the determined transmit power.