Multi-Carrier Scheduling via Segmented PDCCH Search Spaces
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently scheduling downlink and uplink communications across multiple carriers, leading to increased complexity and resource utilization in decoding control channels.
Innovation Solution
A method and apparatus for wireless communication that configures user equipment (UE) to monitor physical downlink control channels (PDCCHs) for control information scheduling physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) communications across a set of carriers, allowing for multi-carrier scheduling without increasing the size of downlink control information (DCI) or blind decoding complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-carrier scheduling is implemented for both downlink and uplink, then scheduling efficiency and network resource utilization are improved, but control channel monitoring complexity and processing overhead increase
Solution Approach 1:
The patent segments the control channel monitoring process by introducing separate search spaces for multi-carrier and single-carrier scheduling DCIs. The UE monitors a first search space for multi-carrier DCIs and a second search space for single-carrier DCIs, dividing the monitoring task into distinct segments that reduce processing complexity while maintaining scheduling efficiency.
Solution Approach 2:
The patent applies local quality by configuring different search spaces with specific qualities or characteristics. The first search space is configured for multi-carrier scheduling with specific DCI formats, while the second search space is configured for single-carrier scheduling, allowing the UE to adapt its monitoring behavior based on the specific requirements of each search space.
2Adaptability or versatility
If DCI size is increased to include both downlink and uplink scheduling information, then scheduling flexibility is improved, but blind decoding complexity increases
Solution Approach 1:
The patent segments the DCI types into separate categories: multi-carrier DCIs for downlink scheduling and single-carrier DCIs for uplink scheduling. By separating these into different search spaces, the UE can decode each type independently, maintaining scheduling flexibility while avoiding the increased complexity of decoding a single enlarged DCI format for both downlink and uplink.
Solution Approach 2:
The patent makes the search space configuration universal by allowing the network to flexibly configure which search spaces monitor for multi-carrier or single-carrier scheduling based on network conditions. This multi-functionality allows the system to adapt to different scheduling requirements without increasing the inherent complexity of the DCI decoding process.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a configuration for monitoring one or more physical downlink control channels (PDCCHs) for downlink control information (DCI) that schedules physical downlink shared channel (PDSCH) communications on each carrier included in a set of carriers and for DCI that schedules physical uplink shared channel (PUSCH) communications on one or more carriers. The UE may monitor the one or more PDCCHs for DCI in accordance with the configuration. The UE may receive DCI that schedules a PUSCH communication on the one or more carriers based at least in part on the monitoring. Numerous other aspects are provided.