PDSCH Puncturing Notification via Collision Type Signaling
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Solution Overview
Problem
In wireless communication systems, collisions between data transmissions and other channels/signals on shared resource elements can occur, leading to interference and diminished performance due to lack of knowledge about collision types (spatial separation or puncturing) at the user equipment (UE).
Innovation Solution
The base station transmits control information to the UE indicating the type of collision, allowing the UE to adjust its reception accordingly, either by spatially separating or puncturing data transmissions based on the indicated procedure, which may include rate matching or dropping specific symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station transmits control information indicating collision type to the UE, then the UE can optimize signal reception by identifying and mitigating interference, but the device complexity and signaling overhead increase
Solution Approach 1:
The collision handling mechanism is segmented into distinct types (spatial separation and puncturing), each with specific indication methods. The base station transmits different control information formats depending on the collision type, allowing the UE to process only the relevant reception adjustments rather than handling all possible scenarios uniformly.
Solution Approach 2:
The base station performs preliminary evaluation to determine whether spatial separation or puncturing will be used before transmitting the data transmission. This evaluation includes assessing available reference signals and channel state information, and the control information indicating the chosen method is transmitted in advance, allowing the UE to prepare appropriate reception processing.
2Productivity
If the base station performs evaluation in time for transmission and uses spatial separation, then communication throughput is improved, but the processing time and complexity at the base station increase
Solution Approach 1:
The base station performs the evaluation of spatial separation feasibility in advance, before the actual data transmission. This allows the determination of the collision handling method to be completed with sufficient time, enabling timely transmission of control information and maintaining high throughput without compromising processing deadlines.
Solution Approach 2:
The base station utilizes already-available reference signals and channel state information for the evaluation process, rather than requiring additional dedicated measurement resources. This self-service approach leverages existing system resources to perform the evaluation without adding significant processing overhead or time delays.
3Adaptability or versatility
If the base station transmits data without rate matching due to insufficient information, then transmission flexibility is improved, but signal quality and reliability deteriorate
Solution Approach 1:
The system dynamically adapts the transmission approach based on available information. When sufficient reference signals and channel state information are available, rate matching is applied to ensure signal quality. When information is insufficient, the system flexibly switches to transmission without rate matching, notifying the UE of the puncturing to maintain adaptability while managing the trade-off in signal quality.
Data Source
AI summary
Methods, systems, and devices for notifying puncturing of a physical downlink shared channel (PDSCH) are described. In some examples, a user equipment (UE) may receive, from a base station, a first control message identifying a set of resources used for transmissions by the base station. The UE may receive a second control message that includes an indication of a procedure used by the base station for a collision between the set of resources and a downlink channel transmitted to the first UE by the base station. In some examples, the UE may receive and decode signals on the downlink channel according to the indicated procedure.