Downlink Control Signal Decoding via Parameter Sets
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently receiving and transmitting downlink control information, particularly in multi-node systems where coordinated communication schemes are complex and require improved methods for decoding data channels.
Innovation Solution
A method for receiving downlink signals in a wireless communication system that involves decoding semi-persistently-scheduled downlink data channels using parameter sets received through higher layer signaling, with specific formats for different DCI formats, and includes configuration for receiving signals from multiple eNBs and handling MBSFN subframes, ensuring efficient resource allocation and interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-node coordinated communication is implemented to increase data throughput and capacity, then system productivity and communication performance are improved, but device complexity and signal reception complexity increase due to multiple parameter sets and interference management requirements
Solution Approach 1:
The patent applies parameter changes by dynamically selecting different parameter sets (first parameter set for DCI format 1, second parameter set for DCI format 2) based on the received DCI format type. This allows the system to adapt parameters such as resource allocation, modulation schemes, and antenna ports according to specific transmission conditions, thereby optimizing data throughput while managing reception complexity through structured parameter selection.
2Reliability
If dispersed nodes are used to reduce pathloss and improve SINR, then transmission capacity and power efficiency are improved, but device complexity increases due to coordinated scheduling and parameter management across multiple nodes
Solution Approach 1:
The patent applies segmentation by dividing the parameter management into distinct sets corresponding to different DCI formats. Each parameter set is specifically configured for dispersed node transmissions, allowing the UE to independently manage parameters for each node without requiring complex integrated scheduling across all nodes simultaneously. This segmented approach reduces coordinated scheduling complexity while maintaining high SINR through optimized per-node parameter selection.
3Productivity
If multiple DCI formats with different parameter sets are used to optimize downlink control information transmission, then communication performance is improved, but manufacturing precision and decoding accuracy requirements increase
Solution Approach 1:
The patent applies local quality by assigning specific parameter sets tailored to each DCI format type. The first parameter set is optimized for DCI format 1 transmissions while the second parameter set is optimized for DCI format 2 transmissions. This localized optimization ensures that each decoding operation uses parameters specifically suited to its format, thereby maintaining high decoding accuracy despite the presence of multiple DCI formats with different characteristics.
Data Source
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AI summary
The method for receiving a downlink signal by a user device in a wireless communication system according to one embodiment of the present disclosure comprises: a step of receiving control information relating to semi persistent scheduling via an upper layer signaling or a downlink control channel; and a step of decoding a semi persistent scheduled downlink data channel based on the control information relating to semi persistent scheduling. The method may comprise: a step of using, if the downlink control information receive via the downlink control channel has a first downlink control information (DCI) format, a predetermined first parameter group from among the candidate parameter groups received via the upper layer signaling so as to decode the downlink data channel; and a step of using, if the downlink control information received via the downlink control channel has a second DCI format, a second parameter group indicated by the downlink control information from among the candidate parameter groups received via the upper layer signaling so as to decode the downlink data channel.