Access Control Parameter Delivery via PDCCH Random Access Response

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Solution Overview

Problem

Existing access control mechanisms in LTE and UMTS systems introduce delays and inefficiencies, particularly for high-priority services and low-latency applications, as they require UEs to acquire System Information Blocks (SIBs) before accessing the network, and frequent paging to update access control parameters is resource-intensive and inefficient.

Innovation Solution

Incorporating access control parameters directly into the access procedure, specifically within the Random Access Response on the Physical Downlink Control Channel (PDCCH), allowing UEs to determine access permission without needing to monitor paging messages or acquire SIBs, thereby reducing latency and overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If access control parameters are provided via System Information Blocks (SIBs), then UEs can determine access permission, but this introduces delays and requires frequent paging updates which consume network resources

Engineering Contradiction:

Improveaccess control parameter deliveryVSAvoidaccess latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent extracts the access control parameter delivery from the traditional SIB-based system and relocates it to the Random Access Response message. This extraction eliminates the need for UEs to acquire SIBs and monitor paging messages, directly reducing access latency while maintaining reliable parameter delivery through the integrated RAR mechanism

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The access control parameters are provided in advance within the Random Access Response message before the UE completes the access procedure. This preliminary action allows UEs to determine access permission immediately upon receiving the RAR, eliminating the time delay associated with SIB acquisition and paging monitoring

Inventive Principle:

Principle #10Preliminary action

2Reliability

If access control parameters are updated frequently via paging, then network access control remains current, but this consumes significant network resources and increases overhead

Engineering Contradiction:

Improveaccess control parameter freshnessVSAvoidnetwork efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent merges the access control parameter delivery with the existing Random Access Response message flow. By combining these functions, the system eliminates the separate paging mechanism for parameter updates, reducing network overhead and improving efficiency while maintaining current access control parameter delivery through the integrated RAR

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The Random Access Response message is given multi-functionality by incorporating access control parameters alongside its traditional roles of providing timing alignment and uplink grants. This universal approach allows a single message to serve multiple purposes, eliminating the need for separate paging updates and improving network productivity

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If UEs monitor paging messages to check for access control parameter updates, then they can access the network when permitted, but this increases power consumption and device complexity

Engineering Contradiction:

Improveaccess control responsivenessVSAvoidUE power consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts the access control parameter delivery from the paging message mechanism, eliminating the need for UEs to monitor paging for parameter updates. UEs now obtain parameters directly through the RAR message during the access procedure, improving adaptability while significantly reducing power consumption by removing the continuous paging monitoring requirement

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system enables UEs to self-obtain access control parameters through the Random Access Response message without requiring external paging notifications. This self-service approach allows UEs to receive necessary parameters as part of their normal access procedure, enhancing responsiveness while reducing power consumption by eliminating dedicated parameter update monitoring

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS9930699B2Providing access control parameters to a user equipment

Publication Date: 2018.03.27 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The present disclosure relates to a method performed in a base station in a radio communication system. The method comprises including an access control parameter in an access control message to be transmitted over a radio interface, the access control parameter being configured for allowing a radio device which receives it as part of an access procedure for accessing the radio communication system to determine whether access to said system is permitted. The method also comprises sending the access control message on a channel which a radio device that intends to connect to the base station has to receive as part of its access procedure. The access control message is sent or indicated on a Physical Downlink Control Channel (PDCCH). The disclosure also relates to a method performed in a radio device, as well as to a base station and a radio device.