Base Station Access Prioritization for Shared-Carrier Load Balancing

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Solution Overview

Problem

The transition to 5G networks is hindered by the presence of both new and old terminals that can access shared carriers, leading to an imbalance in load distribution between base stations that do and do not support shared carriers, affecting service quality.

Innovation Solution

A method involving the broadcasting of priority lists by base stations to guide terminals to select appropriate networks based on their capabilities and signal quality, ensuring that terminals access either shared or non-shared networks efficiently, thereby balancing load across different types of base stations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If both new and old terminals access shared carriers without differentiation, then all terminals can connect to the network, but load distribution becomes unbalanced causing idle base stations and degraded service quality

Engineering Contradiction:
Improvenetwork access efficiencyVSAvoidservice quality
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The patent applies local quality by differentiating access priorities based on terminal types. New terminals (5G-capable) are assigned higher priority to access shared carriers, while old terminals (4G-only) are directed to non-shared carriers. This localized differentiation in access quality resolves the load imbalance problem while maintaining universal network access capability.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent segments the terminal population into two distinct groups: new terminals supporting shared carriers and old terminals not supporting shared carriers. By segmenting the access rights and priorities according to terminal capabilities, the system achieves balanced load distribution across shared and non-shared base stations, preventing idle resources while ensuring service quality.

Inventive Principle:
Principle #1Segmentation

2Productivity

If priority lists are broadcast to guide terminal selection, then load balance is improved, but system complexity increases due to additional signaling

Engineering Contradiction:
Improveload distribution efficiencyVSAvoidsignaling complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent implements preliminary action by pre-configuring and broadcasting priority lists that indicate access preferences for different terminal types. Base stations publish their carrier support capabilities and priority levels in advance, allowing terminals to make informed access decisions before attempting connection. This advance preparation reduces actual connection establishment complexity and improves load distribution efficiency.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12425952B2Method for enabling a terminal to access a base station, and base station, terminal and communication system
Publication Date: 2025.09.23 CHINA TELECOM CORP LTD
  • US12425952B2 patent drawing
  • US12425952B2 patent drawing
  • US12425952B2 patent drawing

AI summary

The present disclosure relates to a method for enabling a terminal to access a base station. The method includes: broadcasting, by a first BS not supporting a shared carrier, a first priority list, wherein the first priority list comprises information indicating that a priority of a BS that does not support the shared carrier is higher than that of a BS that supports the shared carrier; receiving, by the first BS, a first access request from a terminal, receiving, by the first BS, capability information from the terminal in a process of establishing a connection with the terminal; and completing, by the first BS, the connection with the terminal to enable the terminal to access a non-shared network, in a case where the terminal does not support the frequency band of the sharing operator in the shared carrier.