DRNC Cell Capability Signaling Over Iur Interface

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing communication systems fail to transfer video call service capability and MBMS supporting capability across the Iur interface, leading to incorrect decision-making by the SRNC, resulting in redundant attempts, increased processing load, and potential call dropping due to unknown cell capabilities.

Innovation Solution

The method involves the DRNC writing failure cause messages or capability indication information into specific message elements and sending them to the SRNC, allowing the SRNC to know the video call and MBMS service capabilities of DRNC-controlled cells, thereby avoiding redundant attempts and improving decision-making.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the DRNC does not transfer cell capability information through the Iur interface, then the SRNC cannot make informed decisions about video call and MBMS services, but this results in redundant radio link setup attempts, increased processing load, and potential call dropping

Engineering Contradiction:

Improvecall connection reliabilityVSAvoidinformation transfer mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The DRNC transfers cell capability information (video call service capability and MBMS service supporting capability) to the SRNC in advance through the Iur interface using existing message structures. This preliminary action enables the SRNC to make informed decisions before attempting radio link setup, avoiding redundant attempts and improving call connection reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention utilizes existing Iur interface message structures (RADIO LINK SETUP REQUEST, RADIO LINK SETUP FAILURE, etc.) to carry additional cell capability information. By making these existing messages multi-functional, the patent avoids creating new complex message structures while still achieving reliable capability transfer

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If the SRNC repeatedly attempts radio link setup without knowing DRNC cell capabilities, then the processing load increases and time delay increases, but the fundamental problem of unknown cell capabilities remains

Engineering Contradiction:

ImproveSRNC processing efficiencyVSAvoidtime delay in service setup

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The DRNC provides feedback to the SRNC about cell capabilities through the Iur interface. This feedback mechanism enables the SRNC to understand which cells support video call and MBMS services, allowing it to make accurate decisions without repeated trial attempts, thereby improving processing efficiency and reducing time delay

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2385743B1Method, system and DRNC for transporting cell capacity by crossing iur interface

Publication Date: 2016.08.10 ZTE CORP

Figure 1
Figure 2~3
Figure 4~5

AI summary

The present invention provides a method, system and a Drift Radio Network Controller (DRNC) for transferring a cell capability across an Iur interface. The method comprises: a DRNC writing MBMS service supporting capability indication information of a DRNC controlled cell into an indication message or a response message, and sending the indication message or the response message to a SRNC. This method facilitates the SRNC to make a more suitable decision according to the requirement after knowing the cell capability of the DRNC.