RAN Coverage Extent Adjustment for CDMA Resource Conservation
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Solution Overview
Problem
In wireless communication networks supporting both LTE and CDMA protocols, the simultaneous use of multiple CDMA resources for voice and data calls can lead to resource depletion, causing call failures as the number of devices and calls increases, especially when the prevalence of eCSFB-capable devices reaches a threshold.
Innovation Solution
The RAN dynamically adjusts the extent of wireless coverage areas used for communication based on the prevalence of eCSFB devices, limiting or disabling multiple resource assignments to preserve CDMA resources by reducing the number of wireless coverage areas engaged during call establishment, and prioritizing LTE for voice calls if CDMA resources are depleted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RAN engages in multiple simultaneous communications with WCDs using CDMA resources, then communication coverage and availability are improved, but CDMA resources are depleted leading to call failures
Solution Approach 1:
The RAN dynamically adjusts the extent of wireless coverage areas engaged in simultaneous communication based on real-time prevalence metrics of eCSFB devices. When eCSFB device prevalence exceeds a threshold, the RAN reduces the number of coverage areas from a first extent to a second extent, thereby conserving CDMA resources while adapting to changing network conditions
Solution Approach 2:
The system changes the parameter of coverage area extent based on device prevalence thresholds. By monitoring the prevalence metric and comparing it against predefined thresholds, the RAN modifies operational parameters (number of simultaneous coverage areas) to balance resource consumption with service availability
2Quantity of substance
If the RAN limits the extent of wireless coverage areas to conserve CDMA resources, then resource depletion is reduced, but communication coverage is diminished
Solution Approach 1:
The RAN dynamically adjusts the extent of wireless coverage areas engaged in simultaneous communication based on real-time prevalence metrics of eCSFB devices. When eCSFB device prevalence exceeds a threshold, the RAN reduces the number of coverage areas from a first extent to a second extent, thereby conserving CDMA resources while adapting to changing network conditions
3Reliability
If eCSFB devices use CDMA resources for voice calls, then voice service continuity is maintained, but LTE resources are underutilized
Solution Approach 1:
The RAN monitors the prevalence of eCSFB devices and uses this feedback information to adjust resource allocation strategies. By implementing resource management actions based on prevalence metrics, the system optimizes the balance between maintaining voice service continuity through CDMA and utilizing LTE resources for data services
Data Source
AI summary
A RAN may determine a metric indicative of a prevalence of WCDs of a first type served by the RAN. WCDs of a second type may also be served by the RAN. WCDs of the first type may communicate with the RAN using a first air-interface or a second air-interface, and WCDs of the second type may communicate using the second air-interface. The RAN may engage in a first extent of communication with WCDs of the first type or the second type when using the second air-interface. The RAN may compare the metric to a threshold WCD prevalence, and based on the comparison, select a second extent of communication to engage in with WCDs of the first type or the second type. The RAN may receive a call setup request related to a particular WCD, and select at most the second extent of wireless coverage areas for the particular WCD.