5G NR Channel Monitoring CCE Limit Configuration
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Solution Overview
Problem
Existing methods for channel monitoring in 5G NR networks face challenges in managing complexity constraints, leading to increased blocking probability due to the high number of Control Channel Elements (CCEs) that wireless devices need to process, which can result in inefficiencies and performance degradation.
Innovation Solution
The proposed solution configures search spaces for wireless devices based on their CCE processing limits, using hashing functions to determine and prioritize CCEs, and partitions channel estimation limits across CORESETS to reduce the number of CCEs processed, thereby minimizing blocking probability and accommodating complexity constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices monitor all PDCCH candidates in all search spaces mapped to multiple CORESETs, then comprehensive control information reception is achieved, but device complexity and blocking probability increase significantly
Solution Approach 1:
The patent segments the monitoring process by dividing search spaces into different types (common search space and dedicated search space) and applying different monitoring strategies to each. The common search space monitors all PDCCH candidates while the dedicated search space applies hashing-based filtering to select a subset of candidates, thereby reducing overall complexity while maintaining reliable control information reception.
2Productivity
If wireless devices process a large number of CCEs across multiple CORESETs, then complete channel monitoring is achieved, but blocking probability increases due to complexity constraints
Solution Approach 1:
The patent applies preliminary action by performing hashing function calculations before actual PDCCH candidate monitoring. The hashing function pre-determines which CCEs need to be monitored based on RNTI and other parameters, allowing the device to filter out unnecessary CCEs in advance and avoid processing blocks that would otherwise be encountered during exhaustive monitoring.
3Reliability
If the search space is configured to include all PDCCH candidates across multiple CORESETs, then no control information is missed, but the number of CCEs to be processed exceeds device capabilities
Solution Approach 1:
The patent applies local quality by differentiating the monitoring approach between common search space and dedicated search space. In the common search space, all PDCCH candidates are monitored to ensure no critical system information is missed. In the dedicated search space, hashing-based selective monitoring is applied to reduce processing load, optimizing the balance between reliability and ease of operation for different types of control information.
Data Source
AI summary
Methods and apparatuses are disclosed for configuring a search space to the WD based on a Control Channel Element (CCE) limit of the WD. According to one or more embodiments, a network node configured to communicate with a wireless device is provided. The network node includes processing circuitry configured to receive a Control Channel Element, CCE, limit of the wireless device and configure a search space for the wireless device to monitor based at least in part on the CCE limit of the wireless device.