Dedicated Searching Space Merging for LTE Blind Decoding
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Solution Overview
Problem
In the LTE wireless communication system, user equipment (UE) needs to perform blind decoding operations in two different dedicated searching spaces (DSS) for common and semi-persistent scheduling grants, leading to increased loading and power consumption.
Innovation Solution
A method and communication device that allows the UE to determine a single dedicated searching space (DSS) based on the cell radio network temporary identifier (C-RNTI) for monitoring both semi-persistent scheduling and common dynamic grants, reducing the need for dual blind decoding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE monitors both SPS C-RNTI and C-RNTI in PDCCH to receive both semi-persistent scheduling grant and common dynamic grant, then the UE can receive both types of grants, but the UE needs to perform blind decoding operations in two different DSSs, causing increased blind decoding loading
Solution Approach 1:
The patent merges the monitoring of SPS C-RNTI and C-RNTI into a single dedicated searching space (DSS) by determining the DSS location based on C-RNTI. This allows the UE to perform blind decoding in one unified DSS rather than two separate DSSs, thereby reducing blind decoding loading while maintaining the capability to receive both SPS grants and common dynamic grants.
2Reliability
If the UE determines separate DSS locations for SPS C-RNTI and C-RNTI, then the UE can monitor both identifiers, but the UE needs to perform blind decoding in two different DSSs, leading to increased power consumption
Solution Approach 1:
The patent combines the monitoring functions for SPS C-RNTI and C-RNTI into a single DSS determined by C-RNTI. This consolidation reduces the number of blind decoding operations from two separate DSSs to one unified DSS, thereby reducing power consumption while ensuring reliable monitoring of both grant types.
Data Source
AI summary
A method for determining a dedicate searching space (DSS) in a physical downlink control channel (PDCCH) for a user equipment (UE) of a wireless communication system is disclosed. The method includes steps of indicating the UE to monitor a semi-persistent scheduling cell radio network temporary identifier (SPS C-RNTI) in the PDCCH for receiving a semi-persistent scheduling grant, and determining the DSS utilized for monitoring the SPS C-RNTI according to a cell radio network temporary identifier (C-RNTI) of the UE.