Shared Paging and Random Access Channel Resources

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Solution Overview

Problem

Conventional wireless communication systems incur substantial overhead due to the use of separate resources for paging responses and random access channel (RACH) messages, leading to inefficient resource utilization.

Innovation Solution

Implementing a method where a subset of RACH preamble resources is shared for both paging responses and RACH transmissions, allowing the base station to determine the type of response message based on considerations such as paging load and UE entry rate, and transmitting a second response message accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate resources are used for paging responses and RACH messages, then reliability of paging and random access operations is improved, but system overhead increases and resource utilization efficiency deteriorates

Engineering Contradiction:

Improvepaging and random access operation reliabilityVSAvoidsystem overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent combines paging response resources and RACH preamble resources into a shared resource pool. The base station transmits a paging indicator message, and UEs respond using preambles from the shared pool regardless of whether the response is a paging response or RACH message. This merging eliminates the need for separate dedicated resources, reducing system overhead while maintaining operational reliability through the shared resource mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shared preamble resources serve dual functions: they can be used by UEs to respond to paging indicators (paging response function) and by UEs to initiate random access procedures (RACH function). The base station determines the message type based on system state considerations such as paging load and UE entry rate, allowing the same resources to universally handle multiple communication scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If separate resources are allocated for paging responses and RACH messages, then ease of operation is improved, but resource utilization efficiency deteriorates

Engineering Contradiction:

Improvepaging and RACH operation simplicityVSAvoidresource utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent merges paging response and RACH message resources into a single shared resource pool, allowing UEs to use the same preambles for both paging responses and random access initiations. This combining improves resource utilization efficiency by eliminating idle dedicated resources while the base station maintains operational simplicity through centralized resource management and adaptive response selection based on system state.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If shared resources are used for paging responses and RACH messages, then resource utilization efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidbase station resource management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The shared resources perform multiple functions (paging response and RACH), improving resource utilization. The base station manages this complexity by implementing adaptive response selection logic that considers system state parameters (paging load, UE entry rate) to determine whether to transmit paging messages or RACH response messages, thereby handling the multi-functional resource allocation in a systematic manner.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The base station dynamically adjusts its response strategy based on current system conditions. When paging load is high, the base station transmits paging messages; when UE entry rate is high, it transmits RACH response messages. This dynamic adaptation allows the system to efficiently manage shared resources under varying operational conditions without requiring overly complex static resource allocation schemes.

Inventive Principle:

Principle #15Dynamics

4Loss of energy

If shared resources are used for paging responses and RACH messages, then system overhead is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvesystem overheadVSAvoidresponse message type identification accuracy

Core Design Contradiction:

Loss of energyVSMeasurement precision

Solution Approach 1:

The shared resources serve both paging response and RACH functions, reducing system overhead. The base station compensates for the reduced measurement precision in identifying message types by using adaptive decision logic that considers system state parameters (paging load, UE entry rate) to probabilistically determine the most likely message type and select appropriate responses, thereby maintaining effective communication despite the ambiguity introduced by shared resources.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12185274B2Resource sharing between paging response and random access channel message

Publication Date: 2024.12.31 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communication are described. A base station may transmit a paging indicator message to one or more user equipment (UEs) in a group of UEs. The base station may receive, based at least in part on the paging indicator message, a first response message from the one or more UEs. The first response message may be received using a resource that is shared with a random access channel message for the group of UEs. The base station may transmit, based at least in part on the first response message, a second response message to the one or more UEs.