Switched Uplink Mode Coherence Management in Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing switched uplink (SUL) mode operations, particularly in maintaining coherent multiple-input multiple-output (MIMO) transmissions across different frequency bands, leading to potential data communication interruptions and inefficient resource utilization.
Innovation Solution
The method involves a user equipment (UE) receiving configuration information from a base station to determine supported SUL band pairs and coherence capabilities, dynamically updating its transmission mode to non-coherent MIMO when coherent transmission is not feasible, and transmitting this information to the base station to adjust the SUL configuration, ensuring uninterrupted data communication by aligning transmission expectations with capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits capability information indicating support for coherent MIMO in SUL mode, then the network can utilize higher order MIMO transmissions for improved spectral efficiency, but the UE may be unable to maintain coherent transmissions when dynamically switching transmission chains between frequency bands, leading to communication interruptions
Solution Approach 1:
The UE dynamically adjusts its coherence capability indication based on the current transmission chain configuration and SUL mode status. The device can transition between indicating coherent and non-coherent capability depending on whether it is operating in SUL mode or switched to non-SUL mode, ensuring reliable communication while maximizing spectral efficiency when conditions permit.
Solution Approach 2:
The UE changes the coherence capability parameter (from coherent to non-coherent indication) based on operational mode transitions. When switching from SUL mode to non-SUL mode, the UE updates its capability information to reflect the current transmission chain state, preventing misalignment between network expectations and actual UE capabilities.
2Productivity
If the network configures the UE for coherent MIMO transmission in SUL mode, then data communication efficiency is improved, but misalignment between network expectations and UE actual capabilities may cause communication interruptions
Solution Approach 1:
The UE provides feedback to the network about its actual coherence capability in real-time based on current operational mode. The network receives updated capability information from the UE and adjusts its transmission configuration accordingly, ensuring that coherent MIMO is only configured when the UE can actually maintain coherent transmissions.
Solution Approach 2:
The UE proactively updates its coherence capability indication before the network attempts to configure coherent MIMO transmissions. By notifying the network in advance of mode transitions (SUL to non-SUL), the UE prevents the network from configuring transmissions that would fail due to capability mismatch.
3Adaptability or versatility
If the UE dynamically switches transmission chains between frequency bands to support SUL mode, then flexibility in frequency band utilization is improved, but maintaining coherent MIMO transmissions becomes difficult due to PLL retuning requirements
Solution Approach 1:
The system dynamically adjusts the coherence capability indication based on the transmission chain switching state. When the UE switches transmission chains between frequency bands in SUL mode, it transitions to indicating non-coherent capability, allowing flexible frequency band utilization while managing the inherent phase coherence challenges.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, configuration information associated with a switched uplink (SUL) mode in a network including the base station. The UE may transmit, based at least in part on the configuration information indicating that the SUL mode is supported in the network, a tracking update to receive a query associated with capabilities of the UE. Numerous other aspects are described.