Virtual Component Carrier Search Space for Multi-Carrier Scheduling
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Solution Overview
Problem
Current wireless communication systems face challenges in multi-component carrier scheduling, particularly in achieving reliable and efficient data transmission across multiple component carriers, leading to reduced network reliability and spectral efficiency due to increased signaling overhead and the inability of devices to achieve peak throughput.
Innovation Solution
The implementation of a method where a user equipment (UE) establishes connections over multiple component carriers, with a virtual component carrier configured to share a search space, allowing simultaneous scheduling of data transmissions on both primary and secondary cells using a single DCI format, thereby reducing signaling overhead and improving spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate search spaces are allocated for each component carrier, then scheduling flexibility is improved, but signaling overhead increases and device complexity increases
Solution Approach 1:
The patent combines multiple component carrier scheduling functions into a single shared search space. Instead of allocating separate search spaces for each component carrier, the base station configures a unified search space that handles scheduling for multiple component carriers simultaneously, reducing the overall number of search spaces the UE must monitor.
Solution Approach 2:
The shared search space is designed to serve multiple component carriers universally. A single DCI message received in the shared search space can schedule resources across multiple component carriers, making the search space multi-functional rather than dedicated to a single carrier.
2Measurement precision
If multiple DCI formats are used for scheduling each component carrier, then scheduling precision is improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple DCI messages into a single consolidated DCI format that schedules multiple component carriers simultaneously. This single DCI message contains scheduling information for multiple carriers, reducing the total number of DCI messages transmitted while maintaining comprehensive scheduling control.
Solution Approach 2:
The unified DCI format is designed to perform multiple scheduling functions across different component carriers. A single DCI message can allocate resources on multiple carriers with different numerologies and bandwidths, making it a universal scheduling instrument that replaces multiple carrier-specific DCI messages.
3Adaptability or versatility
If separate search spaces are configured for each component carrier, then carrier-specific optimization is improved, but network reliability decreases
Solution Approach 1:
The patent combines search space resources into a shared pool that serves multiple component carriers. This consolidation ensures that scheduling decisions for multiple carriers are coordinated through a unified mechanism, improving reliability by avoiding conflicting scheduling decisions while maintaining carrier-specific optimization capabilities.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may establish a connection, with base station, over a first and second component carrier and may monitor a search space configured for scheduling multiple component carriers. In some cases, the UE may be configured to monitor a search space allocated for a virtual component carrier associated with scheduling multiple component carriers, or the UE may be configured to monitor for a subset of physical downlink control channel (PDCCH) candidates in search spaces associated with the first and second component carriers, where the subset of PDCCH candidates may be allocated for multi-component carrier scheduling. The UE may receive downlink control information (DCI) that schedules a set of data transmissions over the first and second component carriers and the UE may perform or receive the set of data transmissions over the first and second component carrier.