Radio Network Node System Signature for Access

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Solution Overview

Problem

In dense radio communications networks, the high energy consumption and interference due to broadcasting individual system information from each radio network node make it inefficient for user equipment to determine the correct transmission power and access the network, especially when many nodes are not in use, leading to poor Signal to Noise plus Interference Ratio (SINR) even at low traffic.

Innovation Solution

Introducing a 'system signature' that is shared among multiple radio network nodes, allowing user equipment to retrieve the necessary system information for access, reducing the need for each node to transmit its own system information, and enabling efficient power setting and access procedures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If each radio network node transmits individual system information, then user equipment can access the network, but energy consumption increases and interference levels rise

Engineering Contradiction:

Improvenetwork access capabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

Multiple radio network nodes share a common system information structure, where system information is transmitted jointly by multiple nodes using the same time-frequency resources. This merging approach allows user equipment to access the network while reducing total energy consumption and minimizing interference compared to individual node transmissions.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If each radio network node transmits individual system information, then user equipment can determine access parameters, but Signal to Noise plus Interference Ratio deteriorates

Engineering Contradiction:

Improveaccess parameter determinationVSAvoidSignal to Noise plus Interference Ratio

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

System information from multiple radio network nodes is merged into a single transmission using common time-frequency resources, reducing overall interference and improving SINR while still providing user equipment with necessary access parameters.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent converts the potentially harmful effect of multiple transmissions into a benefit by coordinating transmissions so that multiple nodes transmit the same system information simultaneously, transforming what would be interference into constructive signal addition that improves SINR.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If radio network nodes transmit system information with high periodicity, then user equipment can reliably receive information, but energy consumption increases

Engineering Contradiction:

Improveinformation reception reliabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The system uses periodic transmission of system information by multiple nodes sharing common resources, where the periodicity is optimized to maintain reliable reception while reducing overall energy consumption compared to continuous individual node transmissions.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS9462539B2Radio network node, user equipment and methods for enabling access to a radio network

Publication Date: 2016.10.04 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Embodiments herein relate to a method in a radio network node (1) for enabling a user equipment (10) to access a radio communications network. The user equipment (10) is located in an area of the radio communications network. The radio network node (1) retrieves a system signature. The system signature is indicating a set of system information to be used by the user equipment (10) to access the radio network node (1). The radio network node (1) then transmits the system signature within the area. This enables the user equipment (10) to access the radio communications network.