UE Capability Reporting for sSCell Scheduling SpCell
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Solution Overview
Problem
The complexity of user equipment (UE) in supporting multiple cells scheduling a special cell (SpCell) and the interference issues in dynamic spectrum sharing between 5G NR and LTE networks, particularly with control channel difficulties and limitations in Rel-15 NR cross carrier scheduling.
Innovation Solution
Implementing a processor in UE to determine and report capability for sSCell scheduling of SpCell, using cross carrier scheduling and new information elements like CrossCarrierSchedulingConfig-r17 to enable SCell scheduling of SpCell, thereby improving network flexibility and reducing UE complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both SpCell and SCell can schedule the SpCell, then network scheduling flexibility is improved, but UE complexity increases
Solution Approach 1:
The patent segments the scheduling capability reporting into different levels (per band combination, per feature set, per UE) to manage complexity. By dividing the capability indication into hierarchical levels, the system allows flexible scheduling configuration while enabling UEs to report their specific capability support in a structured manner, thus resolving the contradiction between scheduling flexibility and UE complexity.
Solution Approach 2:
The patent introduces dynamic capability reporting where the UE can indicate support for sSCell scheduling SpCell based on its specific capabilities. The network can dynamically configure cross-carrier scheduling relationships based on UE capability reports, allowing the system to adapt scheduling flexibility to actual UE capabilities, thereby balancing flexibility requirements with UE implementation complexity.
2Productivity
If 5G NR and LTE transmissions coexist in the same spectrum using DSS, then spectrum utilization is improved, but control channel interference occurs
Solution Approach 1:
The patent uses capability reporting as an intermediary mechanism between the UE and network. The UE reports its support for sSCell scheduling SpCell, enabling the network to configure appropriate cross-carrier scheduling relationships that avoid interference between NR control channels and LTE CRS. This intermediary capability indication allows the system to coordinate resource allocation and prevent harmful interference while maintaining DSS operation.
Solution Approach 2:
The patent changes the parameter of control channel configuration by introducing cross-carrier scheduling capability indicators. By modifying how scheduling information is reported and configured (adding new capability fields and configuration parameters), the system enables flexible control channel allocation that avoids interference between 5G NR and LTE transmissions in dynamic spectrum sharing scenarios.
3Reliability
If NR control channel rate matching is implemented around LTE CRS, then control channel reliability is improved, but scheduling flexibility is reduced
Solution Approach 1:
The patent introduces dynamic capability reporting and configuration for cross-carrier scheduling. The UE reports its capability to support sSCell scheduling SpCell, and the network dynamically configures scheduling relationships based on these reports. This dynamic approach allows the system to adapt rate matching and scheduling configurations to specific UE capabilities and network conditions, maintaining reliability while preserving scheduling flexibility.
Solution Approach 2:
The patent changes the scheduling configuration parameters by introducing new capability indicators and configuration fields for cross-carrier scheduling. This allows the system to modify control channel parameters (such as CORESET configuration, rate matching patterns) based on UE capability reports, enabling flexible adaptation of rate matching behavior to maintain both reliability and scheduling versatility.
Data Source
AI summary
A user equipment (UE) is configured to determine whether the UE supports a scheduling secondary cell (sSCell) scheduling a special cell (SpCell) and transmit a UE capability message indicating the UE supports an sSCell scheduling an SpCell, wherein the UE capability message comprises one of per band combination support, per feature set support or per UE support.