UCI Coordination for Distributed Carrier Aggregation Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current solutions for coordinating scheduling among distributed scheduler nodes in carrier aggregation (CA) systems face challenges due to backhaul delays and require high priority data transfer, which limits their effectiveness.
Innovation Solution
The proposed solution involves configuring a first scheduler node to communicate with a second scheduler node and performing scheduling for a wireless device across cells with carrier aggregation. This includes transferring data from the first scheduler node to the second scheduler node for scheduling, and receiving a scheduling decision to configure physical downlink channels. Additionally, orthogonal UCI resources and store/decode later techniques are used to coordinate uplink control information effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transferred between distributed scheduler nodes for CA scheduling coordination, then scheduling coordination is achieved, but backhaul delay increases
Solution Approach 1:
The system performs preliminary actions by having the first scheduler node receive and buffer data before transferring to the second scheduler node. This allows the second scheduler node to make scheduling decisions based on already-arriving data, reducing the critical impact of backhaul delay on scheduling timeliness
Solution Approach 2:
The first scheduler node acts as an intermediary by receiving data, buffering it, and forwarding it to the second scheduler node. This intermediary role allows for coordinated scheduling decisions while managing the backhaul delay through controlled data transfer timing
2Manufacturing precision
If high priority data transfer is used for scheduling coordination, then scheduling accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies local quality by implementing priority-based data transfer only where needed - specifically for scheduling-related data between distributed scheduler nodes - rather than elevating all data transfers to high priority. This localized approach maintains scheduling accuracy while avoiding unnecessary system-wide complexity
3Reliability
If orthogonal UCI resources are allocated for distributed CA scheduling, then UCI coordination is improved, but resource overhead increases
Solution Approach 1:
The system segments UCI resources into orthogonal allocations for different scheduler nodes and cells. By dividing the UCI resource space into distinct, non-overlapping portions for each node, the system achieves reliable UCI coordination while efficiently utilizing overall resources without excessive overhead
Data Source
AI summary
Apparatuses and methods for uplink control information (UCI) coordination for distributed carrier aggregation (CA) scheduling are provided. In some embodiments, a method in a first scheduler node of a first cell is provided that comprises receiving data for a wireless device (WD), the data to be scheduled for transmission to the WD in a second cell; transferring the data to a second scheduler node for scheduling transmission of the data in the second cell; and, as a result of the transfer of the data, receiving a scheduling decision from the second scheduler node, the received scheduling decision scheduling the transmission of at least a portion of the data to the WD in at least one physical downlink channel in the second cell.