FCCH SCH Block Implicit Reject Status for Wireless Access Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In wireless communication systems, low-priority access devices in deep coverage holes cannot decode implicit reject status information from AGCH or PCH blocks, leading to delayed system access and increased radio resource consumption due to the need for multiple repetitions, which overloads the system.

Innovation Solution

A network node and wireless device configuration that conveys implicit reject status information through FCCH or SCH blocks, allowing devices to acquire this information without reading additional DL AGCH or PCH blocks, thereby reducing battery consumption and system overload.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple repetitions are used to convey implicit reject status information to devices in deep coverage holes, then device access control is improved, but system capacity is reduced and radio resources are overloaded

Engineering Contradiction:

Improvedevice access controlVSAvoidsystem capacity

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the implicit reject status information transmission by separating it from the AGCH/PCH blocks and placing it in the FCCH/SCH blocks. This allows devices in deep coverage holes to receive access control information without requiring multiple repetitions of the entire AGCH/PCH sequence, thereby maintaining system capacity while improving access control reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The FCCH/SCH blocks serve as intermediary carriers for the implicit reject status information. Instead of directly embedding the reject status in AGCH/PCH blocks that require multiple repetitions, the patent uses FCCH/SCH as an intermediary channel that can convey this information more efficiently, reducing the repetition requirement and preserving system capacity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If multiple repetitions of AGCH or PCH blocks are required for devices in deep coverage holes, then accurate decoding of implicit reject status is improved, but battery consumption increases and access delay increases

Engineering Contradiction:

Improveimplicit reject status decodingVSAvoidaccess delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary action by conveying the implicit reject status information in the FCCH/SCH blocks before the device needs to access the system. This allows devices to determine whether they should attempt access in advance, avoiding the delay of waiting for multiple repetitions of AGCH/PCH blocks and reducing overall access time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a copy of the implicit reject status information in the FCCH/SCH blocks, separate from the original AGCH/PCH blocks. This copy allows devices to obtain the necessary access control information without requiring multiple repetitions of the original blocks, thereby reducing decoding time and battery consumption.

Inventive Principle:

Principle #26Copying

3Reliability

If multiple repetitions are used to ensure device receives implicit reject status, then information delivery reliability is improved, but radio resource consumption increases

Engineering Contradiction:

Improveinformation deliveryVSAvoidradio resource consumption

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts the implicit reject status information from the AGCH/PCH blocks and places it in the FCCH/SCH blocks. This extraction allows the critical access control information to be transmitted separately, reducing the number of repetitions needed for the main AGCH/PCH blocks and thereby reducing overall radio resource consumption while maintaining information delivery reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10142876B2System overload control when in extended coverage

Publication Date: 2018.11.27 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A network node (e.g., base station, eNodeB) is described herein which indicates an implicit reject status in at least one of a frequency correction channel (FCCH) block or a synchronization channel (SCH) block, and transmits the at least one of the FCCH block or the SCH block to at least one wireless device. Further, a wireless device is described herein which receives the at least one of the FCCH block or the SCH block, determines if the received at least one of the FCCH block or the SCH block indicates an implicit reject status is set, and when the received at least one of the FCCH block or the SCH block indicates the implicit reject status is set and when the wireless device has a specific configuration, determines not to attempt to access the wireless communication system.