PDCCH Reception via Short CCE Indexing and RNTI Multiplexing
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Solution Overview
Problem
In next-generation 5G wireless communication systems, efficiently configuring a resource block set for receiving a downlink control channel is challenging, particularly with the introduction of short transmission time intervals (TTIs), which affects the transmission efficiency and battery consumption of user equipment (UE).
Innovation Solution
The method involves configuring a resource block set for transmitting downlink control information in units of a short CCE (sCCE) with a starting index determined through higher layer signaling or physical layer signaling, using additional RNTI values to optimize resource allocation and multiplexing between control channels and data channels, thereby enhancing resource use efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resource block set is configured for downlink control channel in short TTI environment, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The resource block set is divided into multiple control channel elements (CCEs), which are further segmented into resource element groups (REGs). This segmentation allows flexible allocation and mapping of control channels to resource blocks, improving transmission efficiency while managing device complexity through modular structure.
Solution Approach 2:
The configuration of resource block sets is made dynamic through higher layer signaling and physical layer signaling, allowing the system to adapt resource allocation to varying channel conditions and traffic requirements. This dynamic configuration optimizes transmission efficiency without requiring permanent complex hardware structures.
2Productivity
If additional RNTI values are used for resource allocation, then resource use efficiency is improved, but device complexity increases
Solution Approach 1:
Multiple RNTI (Radio Network Temporary Identifier) values are configured to serve different purposes: some for downlink control information, others for uplink control information, and additional ones for interference randomization. This multi-functional use of RNTIs improves resource use efficiency by enabling diverse control channel functions without requiring separate dedicated identifiers for each function.
Solution Approach 2:
The system changes the parameter of RNTI values dynamically through higher layer signaling, allowing flexible assignment of different RNTI values based on channel conditions, user requirements, and interference patterns. This parameter flexibility improves resource efficiency while managing complexity through software-based configuration rather than hardwired structures.
3Reliability
If interference randomization is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
Specific RNTI values are designated as intermediaries for interference randomization purposes. These RNTIs mediate between the control channel transmission and the interference environment, applying randomization patterns that improve reliability by reducing persistent interference without requiring complex adaptive interference cancellation algorithms.
Data Source
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AI summary
The present invention may provide a method for receiving a physical downlink control channel (PDCCH) by a terminal in a wireless communication system, the method comprising: receiving at least one piece of parameter information for acquisition of a control channel element (CCE) index corresponding to a candidate PDCCH, and period information on at least one period during which a configuration related to each of the at least one piece of parameter information is maintained; acquiring the CCE index, using an identical parameter based on each of the at least one piece of parameter information, for each of the at least one period; and receiving the PDCCH by monitoring the candidate PDCCH on the basis of the CCE index.