Inter-UE Resource Pool Signaling With Low Coordination Overhead
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Solution Overview
Problem
Existing methods for inter-UE coordination in wireless communication systems require large payloads to indicate resource pools, leading to excessive overhead, as different UEs may have varying configurations for resource pools.
Innovation Solution
The method involves determining preferred or non-preferred resources based on a first resource pool and transmitting inter-UE coordination information using a medium access control-control element (MAC-CE), with the transmission triggered by predefined conditions or requests, and specifying resources for physical sidelink shared channel (PSSCH) selection based on a pre-defined number of slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource pool information is separately indicated via inter-UE coordination information, then inter-UE coordination capability is improved, but overhead excessively increases
Solution Approach 1:
The patent extracts only the essential resource pool identification information (resource pool ID or index) from the full resource pool configuration, transmitting only this extracted identifier in the inter-UE coordination information. This allows UEs to reference resource pools without transferring complete configuration data, significantly reducing overhead while maintaining coordination capability.
Solution Approach 2:
The patent establishes a universal resource pool identification mechanism where a single resource pool ID or index can refer to different actual resource pool configurations depending on UE-specific settings. This allows one coordination information element to serve multiple purposes and adapt to different UE configurations without requiring separate detailed indications for each UE.
2Measurement precision
If resource pool information is indicated for all configurations, then accuracy of resource pool identification is improved, but payload size increases
Solution Approach 1:
The patent applies local quality by tailoring the level of detail in resource pool indication to the specific UE context. Instead of uniformly providing complete resource pool configurations for all UEs, the system provides sufficient identification information (ID/index) localized to each UE's configuration context, achieving accurate identification without unnecessary payload expansion.
Solution Approach 2:
The patent performs preliminary action by pre-configuring resource pools with unique identifiers (IDs or indices) that are stored in UE memory. When inter-UE coordination is needed, the UE simply references these pre-established identifiers rather than transmitting complete configuration data, enabling accurate identification with minimal payload.
Data Source
AI summary
A method of a first user equipment (UE) for transmitting Inter-UE Coordination Information in a wireless communication system comprises determining preferred resources or non-preferred resources related to transmission of a second UE, and transmitting the Inter-UE Coordination Information to the second UE. The Inter-UE Coordination Information includes information representing a set of the preferred resources or a set of the non-preferred resources. The preferred resources or the non-preferred resources are determined based on a first resource pool, and a resource pool for the transmission of the Inter-UE Coordination Information is based on the first resource pool.