Adaptive Paging Multiplexing for Wireless Device Energy Efficiency
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently transmitting paging signals and non-active-state messages to wireless devices with varying performance constraints and capabilities, leading to inconsistent energy consumption and battery life across different device types.
Innovation Solution
The technique involves adaptively multiplexing paging signals or non-active-state messages with synchronization signal transmissions, configuring wireless devices with appropriate paging modes based on their characteristics. This includes time-multiplexing for narrow-band devices and frequency-multiplexing for broad-band devices, allowing for optimized receiver on-time and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging signals are transmitted using conventional methods to all wireless devices, then all devices can receive paging messages, but energy consumption and battery life become inconsistent across different device types
Solution Approach 1:
The patent segments the paging transmission approach by dividing wireless devices into different categories (narrow-band and broad-band devices) and applying different multiplexing strategies to each segment. Narrow-band devices receive paging signals through time-multiplexed transmissions, while broad-band devices receive them through frequency-multiplexed transmissions, allowing energy-efficient optimization for each device type.
Solution Approach 2:
The patent implements dynamic adaptability by enabling the network to selectively apply different paging transmission modes (time-multiplexed or frequency-multiplexed) based on the specific capabilities and requirements of each wireless device type, allowing the system to dynamically optimize energy consumption while ensuring reliable paging delivery.
2Use of energy by moving object
If time-multiplexed paging is used for narrow-band devices, then energy efficiency is improved, but transmission time increases
Solution Approach 1:
The patent segments the transmission approach by allocating different time-frequency resources for paging signals versus synchronization signals. Narrow-band devices are configured to monitor paging signals in specific time slots that do not overlap with synchronization signal transmissions, reducing their receiver on-time and improving energy efficiency despite the time-multiplexed approach.
3Loss of time
If frequency-multiplexed paging is used for broad-band devices, then receiver on-time is minimized, but frequency resource usage increases
Solution Approach 1:
The patent segments the available frequency spectrum by allocating specific frequency resources for paging signals that are separate from but adjacent to the synchronization signal bandwidth. Broad-band devices can receive both signals simultaneously in the frequency domain, minimizing their receiver on-time while the network manages the increased frequency resource allocation.
Data Source
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AI summary
Methods, in one or more network nodes of a wireless communication system, for transmitting non-active-state messages, as for example paging messages, to wireless devices. An example method comprises obtaining capability information for one or more wireless devices and further comprises selecting a message transmission mode for a first wireless device of the one or more wireless devices, where said selecting is based on the capability information. The selecting of the message transmission mode comprises selecting a relationship, with respect to time, or frequency, or both, between data symbols carrying a non-active-state message for the first wireless device and symbols carrying one or more synchronization signals and/or initial access signals.