Multi-TRP Scheduling with Mixed DCI for Wireless Reliability
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing multiple transmit receive points (TRPs) for reliable and diverse codeword scheduling, leading to limitations in network availability and reliability due to reliance on a single codeword configuration.
Innovation Solution
Implementing a method where user equipment (UE) receives multiple downlink control information (DCI) communications from multiple TRPs, allowing for mixed multi-TRP scheduling modes, enabling codeword diversity and increased reliability by scheduling codewords for multiple TRPs, thereby enhancing communication reliability and availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system relies on a single codeword configuration for scheduling, then the device complexity is reduced, but the network availability and reliability deteriorate
Solution Approach 1:
The patent segments the codeword configuration into multiple independent codewords (first codeword and second codeword), each associated with different TRPs. This segmentation allows the system to maintain multiple scheduling paths independently, improving reliability without requiring the UE to manage a single complex unified configuration.
Solution Approach 2:
The UE is designed to universally handle multiple codeword configurations from multiple TRPs simultaneously. The receiving device can process DCI communications and PDSCH transmissions from different TRPs using different codewords, making the system multi-functional in terms of TRP coordination and codeword management.
2Reliability
If the system schedules codewords for multiple TRPs, then the reliability increases, but the device complexity increases
Solution Approach 1:
The patent implements dynamic switching between different codeword configurations based on TRP availability. The UE can dynamically select between the first codeword from the first TRP and the second codeword from the second TRP depending on which TRP is currently available, reducing the effective complexity at any given moment while maintaining high reliability.
Solution Approach 2:
The system changes the operational parameters by switching between different codeword configurations and TRP combinations. When one TRP becomes unavailable, the system changes parameters to use the alternative TRP and its associated codeword, maintaining communication reliability without requiring complex simultaneous processing of all possible configurations.
3Adaptability or versatility
If the system uses mixed multi-TRP scheduling modes, then the adaptability increases, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent segments the detection process by associating each DCI communication with a specific TRP and codeword configuration. The UE detects DCI messages from different TRPs independently, with each detection instance tied to a specific codeword configuration, reducing the overall difficulty by breaking down the complex multi-TRP detection into simpler independent detection tasks.
4Reliability
If the system allows switching between multiple sets of downlink transmission layers, then the reliability increases, but the loss of time increases
Solution Approach 1:
The patent implements preliminary configuration of multiple codewords and their associated TRPs before switching is needed. The UE is pre-configured with the first codeword from the first TRP and the second codeword from the second TRP, so when switching is required, the alternative configuration is already in place and can be activated immediately, minimizing switching time while maintaining reliability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first downlink control information (DCI) communication for scheduling a first physical downlink shared channel (PDSCH). The first PDSCH may be associated with at least a first transmit receive point (TRP). The UE may receive a second DCI communication for scheduling a second PDSCH. The second PDSCH may be associated with a second TRP and at least one of the first TRP or a third TRP. The UE may receive downlink communications based at least in part on the first DCI communication and the second DCI communication. Numerous other aspects are provided.