PDCCH Blind Decoding Budgeting for Cross-Carrier Scheduling
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Solution Overview
Problem
The challenge in 5G wireless communication systems is maintaining the PDCCH blind decoding budget when a cell can be scheduled by another cell and by itself, which can lead to increased complexity and resource constraints.
Innovation Solution
Implement methods to manage PDCCH blind decoding budgets by configuring search spaces, ordering blind decoding processes, and counting candidates for self-scheduling and cross-carrier scheduling, ensuring that the total PDCCH blind decoding budget is not exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cell is scheduled by another cell and by itself (cross-carrier scheduling enabled), then scheduling flexibility and resource utilization are improved, but PDCCH blind decoding budget and system complexity increase
Solution Approach 1:
The patent segments the blind decoding process by introducing separate search space sets for self-scheduling and cross-carrier scheduling. This segmentation allows the terminal to independently manage and control the blind decoding resources allocated to each scheduling type, preventing the exponential increase in blind decoding attempts that would occur without such separation.
Solution Approach 2:
The patent implements dynamic control of search space configuration through higher-layer signaling (RRC configuration). The network can dynamically adjust the number of search space sets, their sizes, and associations with specific cells based on current scheduling requirements. This dynamic adaptation allows the system to optimize blind decoding budget allocation in real-time, maintaining scheduling flexibility while controlling complexity.
2Productivity
If multiple search space sets are configured for cross-carrier scheduling, then scheduling capability is improved, but terminal processing complexity and resource consumption increase
Solution Approach 1:
The patent applies local quality by configuring different search space sets with specific properties tailored to their purpose. Each search space set can have customized parameters including monitoring occasions, aggregation levels, and DCI format associations. This localized optimization allows the network to allocate processing resources efficiently, ensuring that terminals only process relevant scheduling information for each cell without unnecessary overhead.
Solution Approach 2:
The patent creates universal search space structures that can serve multiple functions. The same search space set configuration framework can handle both self-scheduling and cross-carrier scheduling scenarios, and can be applied across different carrier aggregation configurations. This multi-functionality reduces the need for separate specialized processing paths, thereby controlling terminal complexity while maintaining comprehensive scheduling capability.
3Reliability
If blind decoding is performed for both self-scheduling and cross-carrier scheduling without restrictions, then scheduling coverage is improved, but resource consumption and energy usage increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring search space sets through higher-layer signaling before actual scheduling occurs. The network provides terminals with advance knowledge of where to find scheduling information, what DCI formats to expect, and how many blind decoding attempts are allocated. This preliminary configuration prevents terminals from performing exhaustive blind decoding across all possible locations, significantly reducing energy consumption while maintaining complete scheduling coverage.
Solution Approach 2:
The patent enables self-service by allowing terminals to autonomously manage their blind decoding processes within the configured search space sets. Once configured, terminals can independently identify and process scheduling assignments without requiring network-assisted blind decoding optimization. This self-service capability reduces the signaling overhead and energy expenditure associated with network-controlled blind decoding adjustments.
Data Source
AI summary
The present application relates to methods, systems, and devices related to digital wireless communication, and more specifically, to techniques related to digital wireless communication, and more specifically, to techniques related to maintaining a PDCCH blind decoding budget in the case that a cell can be scheduled by another cell and by itself. In one exemplary aspect, a method for wireless communication is disclosed. The method includes receiving, by a terminal on a scheduling cell, control information for a first cell according to a rule that an amount of blind decoding resources for the first cell does not exceed a budget, wherein the first cell is scheduled by the scheduling cell and the first cell is also scheduled by itself.