Maximum Layer RRC Configuration Through UE Capability Signaling
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Solution Overview
Problem
Legacy UEs are unable to successfully receive radio resource control (RRC) parameters for the maximum number of layers, leading to inefficient hardware utilization and compatibility issues with non-legacy UEs in wireless communication systems.
Innovation Solution
Introduce unambiguous signaling between the network and UEs to differentiate between legacy and non-legacy UEs by using explicit or implicit indications of the maximum layer parameter, allowing the network to apply appropriate RRC signaling and update capabilities sets semi-statically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network sends RRC parameters for maximum number of layers to all UEs, then non-legacy UEs can utilize hardware efficiently, but legacy UEs cannot successfully receive these parameters
Solution Approach 1:
The patent applies local quality by differentiating the treatment of legacy and non-legacy UEs through capability indication. Non-legacy UEs are identified by their ability to indicate support for maximum layer parameter, allowing the network to send RRC parameters only to capable devices. This ensures that each UE type receives appropriate signaling treatment, resolving the contradiction between improving hardware utilization for non-legacy UEs and maintaining reliability for legacy UEs.
Solution Approach 2:
The patent inverts the traditional approach by having UEs indicate their capability to receive maximum layer parameters rather than the network attempting to send parameters to all UEs and handling failures. This inversion allows the network to proactively identify capable UEs and send parameters only to them, eliminating the reception failure issue for legacy UEs while enabling efficient hardware utilization for non-legacy UEs.
2Adaptability or versatility
If the network applies different RRC signaling for legacy and non-legacy UEs, then compatibility is maintained, but signaling complexity increases
Solution Approach 1:
The patent applies preliminary action by having UEs indicate their capability to receive maximum layer parameters before the network sends RRC configuration. This advance indication allows the network to prepare appropriate signaling in advance, avoiding the need for complex trial-and-error signaling approaches. The capability indication is sent once during capability reporting, and the network uses this information to guide subsequent RRC signaling, reducing overall signaling complexity while maintaining compatibility.
3Productivity
If the network updates capability sets semi-statically, then hardware utilization is optimized, but processing overhead increases
Solution Approach 1:
The patent applies periodic action by implementing semi-static updates of capability sets rather than continuous or dynamic updates. The network updates the maximum layer parameter in RRC reconfiguration messages at appropriate intervals or when conditions change, rather than continuously monitoring and adjusting. This periodic update approach allows the UE to maintain optimized capability settings for extended periods, reducing processing overhead while still enabling hardware utilization optimization when updates occur.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may send a capabilities report to a base station. The capabilities report may include an explicit indication that the UE is capable of receiving a maximum layer radio resource control (RRC) parameter, or may include ambiguous (e.g., multiple) capabilities. The base station may receive the capabilities report, and may determine whether to transmit a maximum layer RRC parameter based on the explicit indication, or the ambiguous capabilities, which indicates a maximum number of layers to be used for subsequent communications. If the UE is capable of receiving the maximum layer RRC parameter, the base station may send the maximum layer RRC parameter to the UE, and may perform wireless communications according to the indicated maximum number of layers.