CDMA Reference Cell ID Management in LTE Networks

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Solution Overview

Problem

Current methods for populating eNodeBs with CDMA reference cell IDs in LTE networks are manual, prone to errors, and fail to account for additions, location changes, or RF coverage changes of CDMA base stations and eNodeBs, leading to inefficiencies in providing circuit-switched services.

Innovation Solution

A method using the Session Initiation Protocol (SIP) for a network node to subscribe to and manage RF coverage and location information from eNodeBs and CDMA base stations, determining proximate CDMA base stations, and automatically communicating their reference cell IDs to eNodeBs, enabling automatic and error-free population of CDMA reference cell IDs without human intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual methods are used to populate eNodeBs with CDMA reference cell IDs, then the process is simple to implement, but it is prone to errors and cannot account for dynamic changes in network components

Engineering Contradiction:

Improveaccuracy of CDMA reference cell ID managementVSAvoidcomplexity of management system

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system enables automatic self-service where eNodeBs and CDMA base stations autonomously provide their RF coverage and location information to the network node. The network node automatically processes this information, determines proximity relationships, and distributes CDMA reference cell IDs to eNodeBs without human intervention, eliminating manual errors while maintaining system simplicity through automated workflows

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system implements continuous feedback mechanisms where eNodeBs and CDMA base stations regularly communicate their RF coverage and location information to the network node. The network node uses this feedback to dynamically update proximity determinations and refresh CDMA reference cell ID assignments, ensuring the system adapts to network changes automatically

Inventive Principle:

Principle #23Feedback

2Productivity

If manual population methods are used, then the system complexity is low, but the productivity and efficiency of service fallback are reduced

Engineering Contradiction:

Improveefficiency of circuit-switched service fallbackVSAvoidcomplexity of information management system

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system performs preliminary actions by having eNodeBs and CDMA base stations pre-register their RF coverage and location information with the network node. The network node pre-computes proximity relationships and maintains an updated database of CDMA reference cell IDs, enabling rapid service fallback without real-time manual intervention

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The network node serves as an intermediary that centralizes the collection, processing, and distribution of RF coverage and location information. It mediates between eNodeBs and CDMA base stations, automatically determining proximity relationships and distributing appropriate reference cell IDs, thereby improving productivity without requiring direct complex interactions between all network components

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If automatic management systems are implemented, then the reliability and accuracy of CDMA reference cell ID management are improved, but the system complexity increases

Engineering Contradiction:

Improveability to account for network component changesVSAvoidcomplexity of automated management system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system implements dynamic adaptation where eNodeBs and CDMA base stations continuously update their RF coverage and location information with the network node. The network node dynamically re-evaluates proximity relationships based on current network conditions and automatically updates CDMA reference cell ID assignments, enabling the system to adapt to additions, location changes, or RF coverage changes in network components

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9237547B1Management of CDMA reference cell identifiers in an LTE network

Publication Date: 2016.01.12 T MOBILE INNOVATIONS LLC

AI summary

A method, system, and medium are provided for managing CDMA reference cell identifiers (IDs) in a long-term-evolution (LTE) network using Session Initiation Protocol (SIP). A network node subscribes to RF coverage information and location information of eNodeBs and CDMA base stations within the network. After receiving this information from the eNodeBs and the CDMA base stations, the network node uses the information to determine CDMA base stations that are in proximity to each eNodeB. The eNodeBs in the network subscribe to CDMA reference cell IDs of those CDMA base stations that have been determined by the network node to be in proximity to the respective eNodeB. After receiving the CDMA reference cell IDs from the network node, the eNodeB utilizes the received information to select a CDMA base station to utilize when a network customer's UE requires circuit-switched services.