sEPDCCH Resource Element Arrangement for Short TTI
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving a shortened enhanced physical downlink control channel (sEPDCCH) due to unknown methods for handling shorter transmission time intervals (TTIs), leading to degraded resource utilization and scheduling performance.
Innovation Solution
A network and communication device that determine the duration of a shortened TTI, calculate the number of available resource elements, and arrange them in a specific matrix structure to facilitate proper transmission and reception of the sEPDCCH, using channel bandwidth and CSI to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the transmission time interval (TTI) is shortened to reduce latency, then latency is reduced, but the method for transmitting and receiving sEPDCCH is unknown causing resource utilization degradation
Solution Approach 1:
The patent segments the shortened TTI into specific structural components including control resource sets, physical downlink control channels, and data channels with defined relationships. This segmentation provides a systematic framework for handling sEPDCCH transmission within shortened TTI while maintaining proper resource allocation and utilization.
2Ease of operation
If the TTI is shortened to improve user experience, then latency is reduced, but scheduling performance is degraded due to unknown sEPDCCH handling methods
Solution Approach 1:
The patent establishes dynamic relationships between control resource sets and physical channels within the shortened TTI structure. The method dynamically allocates and coordinates resources for sEPDCCH transmission, enabling flexible scheduling that adapts to varying conditions while maintaining improved user experience through reduced latency.
Data Source
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AI summary
A network of handling a sEPDCCH transmission comprises instructions of determining a duration of a sTTI; determining the number of a plurality of available REs of a plurality of REs in a sSU, n_EPDCCH; determining an AL of the sSU, Q; determining the number of a plurality of ECCEs in an aggregated sSU, K; determining the number of a plurality of EREGs in an ECCE, A; numbering a plurality of available REs in the aggregated sSU from 0 to (A*K-1) cyclically; arranging the plurality of EREGs numbered with 0 to (A*K-1) according to a K by A matrix; determining the number of a plurality of aggregated sSUs for performing the sEPDCCH transmission, N; determining the number of a plurality of ECCEs in N aggregated sSUs, N*K; and determining a sEPDCCH position on N*K consecutive ECCEs.