HS-SCCH Order Recovery in Multi-SIM Wireless Devices

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Solution Overview

Problem

Multi-SIM wireless communication devices experience network mismatches and energy inefficiencies due to tune-away gaps, leading to failed activation/deactivation orders and incorrect Channel Quality Indicator (CQI) reports, which impact user experience with low throughput and decoding failures.

Innovation Solution

The wireless communication device continuously monitors the High-Speed Shared Control Channel (HS-SCCH) for scheduling information to detect the network-set activation state of a secondary cell after a tune-away gap, adjusting the activation state accordingly to match the network-set state, thereby ensuring accurate configuration and efficient resource management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the RF resource is tuned away from the first subscription to the second subscription to enable multi-SIM functionality, then the device can support multiple subscriptions, but the HS-SCCH order transmission may collide with the tune-away gap causing Layer 1 procedure failure

Engineering Contradiction:

Improvemulti-SIM functionalityVSAvoidHS-SCCH order reception

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The wireless communication device determines the network-set activation state before the tune-away gap occurs, or prepares to detect it immediately after, so that the activation state is already known when the HS-SCCH order is transmitted. This preliminary determination prevents the configuration mismatch that would otherwise occur due to the tune-away gap blocking the order reception.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The device continuously monitors the HS-SCCH for scheduling information to detect the network-set activation state after the tune-away gap, using this feedback to adjust and synchronize its own activation state with the network's expected state. This feedback mechanism ensures that any missed HS-SCCH orders are recovered and the device configuration remains synchronized with the network.

Inventive Principle:

Principle #23Feedback

2Stability of the object's composition

If the network proceeds with target configurations assuming successful HS-SCCH order completion, then the network can maintain configuration consistency, but the wireless communication device may have mismatched configuration due to tune-away gap

Engineering Contradiction:

Improvenetwork configuration consistencyVSAvoiddevice-network configuration alignment

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The wireless communication device continuously monitors the HS-SCCH channel for scheduling information that indicates the network-set activation state. By detecting this feedback from the network after the tune-away gap, the device can determine what configuration the network expects and adjust its own configuration accordingly, ensuring alignment between device and network states.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The device dynamically adjusts its secondary cell activation state based on the detected network-set activation state from HS-SCCH monitoring. Rather than maintaining a static configuration, the device continuously adapts its state to match the network's expectations, allowing it to recover from missed HS-SCCH orders and maintain synchronization despite tune-away gaps.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the wireless communication device remains in connected state without data transmission after HS-SCCH order failure, then the device can retry communication, but energy is wasted unnecessarily

Engineering Contradiction:

Improvecommunication retry capabilityVSAvoidenergy consumption in connected state

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The device uses feedback from continuous HS-SCCH monitoring to detect the network-set activation state and determine whether the network expects the secondary cell to be active or deactivated. This feedback allows the device to make informed decisions about maintaining or releasing the connected state, avoiding unnecessary energy consumption while preserving the ability to retry when appropriate.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The device autonomously determines when to maintain connected state and when to release it by monitoring HS-SCCH for network-set activation state indicators. Rather than passively remaining connected or actively staying disconnected, the device self-manages its connection state based on network feedback, optimizing the balance between communication reliability and energy efficiency.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20180013462A1HS-SCCH order recovery in multi-subscriber identity module (SIM) wireless communication devices

Publication Date: 2018.01.11 QUALCOMM INC

AI summary

Examples described herein relate to managing communications on a first subscription and a second subscription of a multi-Subscriber Identity Module (SIM) wireless communication device via a Radio Frequency (RF) resource, including, but not limited to, tuning the RF resource away from the second subscription to the first subscription, detecting a network-set activation state of a secondary cell associated with the first subscription, and adjusting the activation state of the secondary cell based on the network-set activation state.