Semi-dynamic Rate Matching for Multi-TRP Wireless Systems
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Solution Overview
Problem
In wireless communications, when a user equipment (UE) communicates with multiple transceiver nodes, the first transceiver node conveys less data to the UE per slot due to reduced resource elements (REs) dedicated to downlink data, leading to inefficient data transmission.
Innovation Solution
The described techniques enable transceiver nodes to coordinate and switch between different rate matching states based on indications from other transceiver nodes, allowing for increased data transmission by adjusting the resource configuration of the physical downlink shared channel (PDSCH) accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE communicates with multiple transceiver nodes, then the system can provide diverse communication services, but the first transceiver node conveys less data to the UE per slot due to reduced resource elements dedicated to downlink data
Solution Approach 1:
The patent implements dynamic rate matching state switching where the transceiver node can transition between a first rate matching state (when operating alone) and a second rate matching state (when operating with multiple transceiver nodes). This dynamic adaptation allows the system to adjust resource element allocation based on the operational mode, resolving the contradiction between multi-node operation capability and data transmission efficiency
Solution Approach 2:
The patent changes the rate matching state parameter based on the transceiver node operation mode. When receiving an indication that another transceiver node is transmitting, the system switches from a first rate matching state to a second rate matching state, thereby adjusting the number of resource elements dedicated to downlink data and resolving the contradiction between adaptability and productivity
2Productivity
If the transceiver node switches rate matching state immediately upon receiving indication, then data transmission efficiency improves, but there is a delay between receiving the indication and switching states that must be managed
Solution Approach 1:
The patent implements preliminary action by switching the rate matching state in advance or in coordination with the indicated timing. The transceiver node receives an indication from another transceiver node to switch rate matching states and performs the switch accordingly, managing the transition delay to minimize impact on data transmission efficiency
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A UE may communicate with a set of transceiver nodes (e.g., transmission reception points (TRPs)) in a first transceiver node operation mode (e.g., a multi-TRP mode). A first transceiver node of the set of transceiver nodes may receive, from a second of the set of transceiver nodes, an indication to switch between rate matching states. The first transceiver node may switch from a first rate matching state to a second rate matching state and may transmit a downlink shared channel based on a resource configuration associated with the second rate matching state. The UE may receive the shared channel based on an antenna port configuration determined by the UE based on the first transceiver node operation and rate matching information. The rate matching information may be provided by the first transceiver node.