Compact DCI with Preconfigured Scheduling Parameters
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Solution Overview
Problem
Wireless communication systems face challenges in managing and optimizing finite wireless channel resources due to signal attenuation and blocking in complex environments, particularly in reducing the size of downlink control information (DCI) while maintaining flexibility and avoiding latency.
Innovation Solution
The use of compact DCI formats with preconfigured rules for interpreting DCI fields, allowing for a greater range of parameter selection without adding latency, by indicating preconfigured options for interpreting absent or reduced fields, enabling efficient scheduling and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DCI size is reduced to improve resource utilization, then signaling efficiency is improved, but flexibility in scheduling parameters deteriorates
Solution Approach 1:
The patent applies preliminary action by preconfiguring scheduling parameter sets (first set, second set, third set) with different parameter configurations before actual scheduling occurs. The DCI message includes a preconfigured field that indicates which preconfigured set to use, allowing the system to switch between different parameter flexibilities without transmitting complete parameter sets each time. This resolves the contradiction by maintaining scheduling flexibility through preconfigured options while reducing actual DCI size by only transmitting a compact indicator.
Solution Approach 2:
The patent implements parameter changes by dynamically selecting between multiple preconfigured parameter sets based on the indicated field value. Different parameter sets contain different configurations (e.g., different time domain resource allocation parameters, frequency domain resource allocation parameters, modulation and coding schemes). By changing which parameter set is activated rather than transmitting all parameters, the system achieves both reduced signaling size and maintained flexibility.
2Quantity of substance
If DCI fields are reduced or made absent to decrease DCI size, then signaling overhead is reduced, but interpretation accuracy deteriorates
Solution Approach 1:
The patent introduces an intermediary mechanism - the preconfigured field in the DCI message - that indirectly specifies parameter interpretations without transmitting complete parameter definitions. This intermediary field acts as a reference key that points to preconfigured parameter sets, both at the transmitting side (network entity) and receiving side (UE). The intermediary resolves the contradiction by maintaining interpretation accuracy through the reference mechanism while significantly reducing the quantity of data that must be transmitted.
Solution Approach 2:
The patent applies copying by having the UE store multiple preconfigured parameter sets locally in memory before receiving DCI messages. When a DCI message with a preconfigured field is received, the UE copies the appropriate parameter set from its stored configurations based on the field value. This copying mechanism ensures accurate interpretation (using the exact preconfigured parameters) while keeping the transmitted DCI size small (only the indicator field needs to be transmitted).
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communications by a user equipment (UE). The method generally includes receiving, from a network entity, downlink control information (DCI) that includes a first field that indicates a preconfigured option for interpreting at least a second field associated with the DCI, interpreting at least the second field in accordance with the preconfigured option indicated by the first field, and communicating with the network entity in accordance with the interpretation of the second field.