Multi-Cell PDSCH Scheduling Using Unified PDCCH Control
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Solution Overview
Problem
The increasing number of terminals in a network leads to insufficient scheduling capacity in wireless communication systems, particularly for physical downlink shared channels (PDSCHs), necessitating a method to efficiently allocate radio resources across multiple cells.
Innovation Solution
A method involving a scheduling cell that transmits downlink control information via a physical downlink control channel (PDCCH) of one cell, allowing for the allocation of frequency domain resources to multiple cells, enabling efficient scheduling of PDSCHs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of terminals in the network increases, then the network capacity and data traffic demand increase, but the scheduling capacity becomes insufficient
Solution Approach 1:
The PDCCH of a single cell is designed to perform multiple scheduling functions, simultaneously allocating resources for PDSCHs across multiple cells. This multi-functional approach allows one control channel to serve multiple data channels, effectively increasing scheduling capacity without proportionally increasing the number of control channels.
Solution Approach 2:
The patent combines multiple scheduling functions into a unified PDCCH structure. By merging the control functions for multiple cells into a single PDCCH transmission, the system reduces overhead and improves scheduling efficiency while handling increased terminal density.
2Adaptability or versatility
If separate scheduling is performed for each cell, then resource allocation flexibility is maintained, but scheduling overhead and complexity increase
Solution Approach 1:
The PDCCH structure is designed to provide universal scheduling capability across multiple cells through a single transmission. The downlink control information includes fields that can indicate resource allocations for multiple PDSCHs, maintaining flexibility while reducing the number of separate control transmissions needed.
Solution Approach 2:
The downlink control information is segmented into multiple fields that can independently specify resource allocations for different cells. This segmentation allows flexible resource allocation across multiple cells while keeping the overall control structure unified and efficient.
Data Source
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AI summary
The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate than a 4th generation (4G) communication system such as long term evolution (LTE). The present disclosure is for transmitting and receiving data and control information in a wireless or communication system. A method for operating a terminal comprises the steps of: receiving a radio resource control (RRC) message; identifying, from the received RRC message, information on a scheduling cell and information on a format for downlink control information to be received; receiving, from the scheduling cell, the downlink control information according to the identified format; and receiving, on the basis of the downlink control information, data through a plurality of cells, wherein the downlink control information may comprise frequency domain resource allocation information for a physical downlink shared channel (PDSCH) of the plurality of cells. Various other embodiments are also possible.