Dynamic Paging Subband Allocation for LTE Power Optimization
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Solution Overview
Problem
Current paging mechanisms in wireless communication networks, particularly in LTE-Advanced architecture, are inefficient due to fragmented multi-band operational capabilities and mixed populations of legacy and newer user equipment (UEs) with varying RF capabilities, leading to suboptimal resource utilization and increased power consumption.
Innovation Solution
The solution involves optimizing paging channel access by allocating resources based on network parameters such as total cell bandwidth and UE characteristics, and broadcasting schedules to configure UE modems for efficient paging channel reception, allowing for flexible resource allocation and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging messages are transmitted over the entire cell bandwidth in frequency-domain systems, then all user devices can receive paging notifications, but resource utilization becomes inefficient and power consumption increases
Solution Approach 1:
The patent segments the cell bandwidth into multiple frequency subbands and divides paging messages into different groups, allocating specific subbands to different paging message groups. This segmentation allows user devices to receive paging notifications on specific subbands rather than monitoring the entire cell bandwidth, thereby reducing power consumption while maintaining reliable paging delivery.
Solution Approach 2:
The patent implements local quality by assigning different paging message groups to different frequency subbands based on user device characteristics and network conditions. Each subband is optimized for specific paging traffic patterns, allowing efficient resource utilization and reduced power consumption for user devices monitoring specific subbands.
2Reliability
If entire time slots are reserved for paging processes in time-domain systems, then paging notifications can be reliably delivered, but resource utilization becomes inefficient
Solution Approach 1:
The patent introduces dynamic paging resource allocation where time slots and frequency subbands are dynamically assigned to different paging message groups based on real-time network conditions and user device characteristics. This dynamic approach allows flexible resource utilization while ensuring reliable paging delivery, unlike static time slot reservations.
Solution Approach 2:
The patent implements periodic paging opportunities where user devices can be paged at regular intervals on assigned subbands. This periodic structure allows reliable paging delivery while enabling user devices to enter low-power states between paging opportunities, improving resource utilization efficiency.
3Ease of operation
If paging resources are allocated without considering UE capabilities, then all user devices can operate uniformly, but spectral efficiency decreases due to fragmented multi-band operational capabilities
Solution Approach 1:
The patent changes the paging allocation parameters based on user device capabilities, specifically considering multi-band operational capabilities. User devices are assigned to specific frequency subbands matching their RF capabilities, eliminating wasted spectral resources from attempting to page devices on unsupported bands while maintaining uniform operation through automated capability-based assignment.
Data Source
AI summary
Methods and apparatus enabling a wireless network to dynamically change or implement paging mode operation, such as optimization based on one or more network parameters. In one embodiment, the wireless network is a cellular network (e.g., 3G UMTS or LTE), and both base stations and cellular user devices dynamically configure the paging mode operation based on various desired operational attributes relating to the network parameters. Such flexible paging mechanisms may be published to the network users via several methods, and users with appropriately enabled user devices may improve their power and applications performance. Base stations may also advantageously reclaim freed-up cellular resources to support other services. Legacy subscribers are also not affected.