Uplink Transmission Path Switching for RF Chain Conflict Resolution
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Solution Overview
Problem
In wireless communications, conflicts between default data subscriptions performing uplink MIMO communications and non-default data subscriptions performing idle mode activities lead to interference and subsequent outages, resulting in high throughput loss as the default data subscription drops uplink MIMO transmissions to release RF chains for idle mode activities.
Innovation Solution
User equipment (UE) switches the uplink transmission path from conflicting RF chains to available different RF chains, allowing both sets of chains to be used simultaneously, thereby avoiding interference and maintaining uplink transmissions during idle mode activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the default data subscription releases RF chains for idle mode activities of non-DDS, then idle mode activities can be performed, but uplink MIMO transmissions are dropped causing throughput loss
Solution Approach 1:
The patent segments the RF chains into multiple groups, allowing the DDS to use a subset of RF chains for uplink MIMO transmissions while the nDDS uses other RF chains for idle mode activities. This segmentation enables both subscriptions to operate simultaneously without resource conflicts, resolving the contradiction between maintaining uplink throughput and enabling idle mode activities.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by enabling simultaneous operation on multiple RF chains with different configurations. Instead of time-division multiplexing (one subscription at a time), the system uses space-division multiplexing across multiple RF chains, allowing both DDS and nDDS to operate concurrently in different dimensional spaces.
2Productivity
If the default data subscription maintains RF chains for uplink MIMO transmissions, then uplink throughput is maintained, but idle mode activities of non-DDS cannot be performed
Solution Approach 1:
The patent makes the RF chain resource pool universal by allowing dynamic allocation among multiple subscriptions. The same pool of RF chains can serve both DDS uplink MIMO transmissions and nDDS idle mode activities simultaneously, with each subscription accessing the universal resource pool according to its needs, thus achieving multi-functionality of the RF chain infrastructure.
3Reliability
If the UE switches uplink transmission path to different RF chains during tuneaway occasions, then interference is avoided and uplink transmissions continue, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple RF chains and establishing transmission path switching capabilities before conflicts occur. The UE prepares alternative transmission paths in advance, so when a tuneaway occasion is detected, the switch can be executed immediately without complex real-time decision-making, reducing operational complexity while maintaining reliability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In a wireless communications system, a user equipment (UE) may use intelligent transmission selection for enhancing uplink performance. The UE may identify a quantity of tuneaway occasions in which the UE is to tune away at least one radio frequency (RF) chain of multiple RF chain from a first subscription to a second subscription. The UE may identify a conflict for an uplink transmission associated with the first subscription during a first tuneaway occasion. The UE may switch the uplink transmission from one or more first RF chains to one or more available second RF chains based on the conflict, and the UE may transmit the uplink transmission using the one or more available second RF chains based on the switching.