Simultaneous Uplink Transmissions via Multi-Subscription RF Chains
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting simultaneous uplink transmissions for multiple subscriptions without requiring specialized hardware or increasing complexity and power consumption.
Innovation Solution
A user equipment (UE) leverages its existing uplink carrier aggregation and MIMO capabilities to perform simultaneous uplink transmissions by using multiple RF chains, allowing for concurrent communications with different base stations based on carrier aggregation and MIMO capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If specialized hardware is used to support simultaneous uplink transmissions for multiple subscriptions, then transmission capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent makes existing RF chains perform multiple functions by enabling them to handle multiple subscriptions through carrier aggregation and MIMO techniques. The same RF hardware that was designed for single-subscription operation is now configured to support concurrent transmissions for multiple subscriptions by utilizing different carriers and spatial streams, eliminating the need for dedicated hardware per subscription.
Solution Approach 2:
The patent combines multiple transmission functions into existing RF chains by merging carrier aggregation capabilities and MIMO operations with dual-subscription support. Multiple logical channels and carriers are combined within the same physical RF infrastructure, allowing simultaneous uplink transmissions for multiple subscriptions without adding separate hardware paths.
2Productivity
If specialized hardware is added for simultaneous uplink transmissions, then transmission capability is improved, but power consumption increases
Solution Approach 1:
Existing RF chains are made multi-functional to handle multiple subscriptions concurrently. The same power-amplifying and signal-processing hardware that operates for single-subscription mode is now configured to support multiple subscriptions through carrier aggregation and MIMO, avoiding the additional power consumption that would result from activating separate dedicated hardware paths.
Solution Approach 2:
Multiple transmission tasks are merged into existing RF chain operations. By combining carrier aggregation and MIMO functionalities with multi-subscription support within the same hardware infrastructure, the patent avoids the incremental power consumption that would accompany additional specialized hardware components.
3Device complexity
If existing RF chains are used for simultaneous uplink transmissions, then device complexity is reduced, but transmission capability may be limited
Solution Approach 1:
The patent changes operational parameters of existing RF chains to enable simultaneous uplink transmissions. By adjusting carrier frequency assignments, power allocation across multiple carriers, and MIMO spatial stream configurations, the existing hardware achieves multi-subscription concurrent transmission capability without physical modifications.
Solution Approach 2:
The system dynamically configures existing RF chains to support multiple subscriptions through time-varying carrier aggregation and MIMO parameter adjustments. The RF chains adapt their operational characteristics dynamically to accommodate simultaneous transmissions for different subscriptions, transforming static single-function hardware into dynamic multi-functional systems.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform, to a first base station and via a first radio frequency (RF) chain associated with a first subscription, a first uplink transmission based at least in part on one or more of an uplink carrier aggregation capability of the UE or an uplink multiple-input multiple-output (MIMO) capability of the UE. The UE may perform, to the first base station or to a second base station, and via a second RF chain associated with a second subscription and configured to operate simultaneously with the first RF chain, a second uplink transmission based at least in part on one or more of the uplink carrier aggregation capability of the UE or the uplink MIMO capability of the UE. Numerous other aspects are described.