CDMA Paging Parameter Adjustment for CSFB Prevalence

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In wireless communication networks that support both Long-Term Evolution (LTE) and CDMA protocols, the increasing prevalence of Circuit Switch Fallback (CSFB) devices leads to reduced usage of CDMA paging and access channels, affecting the service quality for non-CSFB devices.

Innovation Solution

A method to determine the prevalence of CSFB devices in a coverage area and adjust paging parameters for the CDMA protocol to optimize channel usage, including updating parameters such as quick-paging settings, slot cycle indices, and overhead message timing to improve paging success rates and resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If CSFB devices are supported in the network, then device compatibility and service coverage are improved, but CDMA paging channel occupancy increases and service quality for non-CSFB devices deteriorates

Engineering Contradiction:

Improvedevice compatibilityVSAvoidpaging success rate for non-CSFB devices

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating treatment based on device type. The network determines the prevalence of CSFB devices in specific coverage areas and adjusts paging parameters locally for non-CSFB devices in those areas. This allows optimized paging for non-CSFB devices in CSFB-heavy areas while maintaining general CSFB support throughout the network.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements dynamics by making paging parameters adjustable and adaptive rather than fixed. The network dynamically determines CSFB device prevalence and adjusts paging parameters (such as paging cycle time, paging message structure, and channel allocation) accordingly. This dynamic adjustment allows the system to respond to changing device compositions in coverage areas.

Inventive Principle:

Principle #15Dynamics

2Area of stationary object

If CSFB devices increase in a coverage area, then network coverage is expanded, but CDMA access channel usage decreases and resource allocation for non-CSFB devices is reduced

Engineering Contradiction:

Improvecoverage areaVSAvoidchannel utilization efficiency

Core Design Contradiction:

Area of stationary objectVSProductivity

Solution Approach 1:

The patent applies parameter changes by modifying network parameters based on device prevalence. When CSFB device prevalence is detected, the network changes paging parameters, access channel allocation, and resource distribution settings. This allows the network to optimize channel utilization by adjusting parameters to match the actual device composition in each coverage area.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback mechanisms where the network continuously monitors device composition in coverage areas and uses this information to adjust paging and access channel parameters. This feedback loop enables the network to respond to changing conditions and optimize resource allocation based on actual usage patterns and device prevalence.

Inventive Principle:

Principle #23Feedback

3Reliability

If paging parameters are adjusted for non-CSFB devices in high-CSFB areas, then paging success rate improves, but network complexity increases

Engineering Contradiction:

Improvepaging success rateVSAvoidnetwork control complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies self-service by enabling the network to automatically determine CSFB device prevalence and adjust paging parameters without manual intervention. The system self-monitors device composition, self-determines optimal parameters, and self-adjusts paging configurations. This automation reduces operational complexity while maintaining high paging success rates.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements preliminary action by pre-configuring multiple paging parameter sets that can be applied based on detected CSFB device prevalence. The network prepares different paging configurations in advance and selects the appropriate one based on real-time device composition detection, avoiding the need for complex real-time calculations and reducing control complexity.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8929927B1Adjustment of communication parameters in a coverage area based on prevalence of eCSFB devices in the coverage area

Publication Date: 2015.01.06 SPRINT SPECTRUM LLC

AI summary

Disclosed herein are methods and systems that may help to adjust, e.g., CDMA paging and access parameters in a coverage area, based on the prevalence of devices that are configured for enhanced circuit switch fallback (eCSFB) in the coverage area. For example, a base station in a radio access network (RAN) may: determine a measure of circuit switch fallback (CSFB) device prevalence in a coverage area, use the measure of CSFB-device prevalence in the coverage area as a basis for updating one or more paging parameters for communications via a paging channel defined under the first air-interface protocol; and apply the one or more updated paging parameters to communications with devices via the paging channel defined under the first air-interface protocol.