PDCCH DCI Signaling for Fast Multi-Cell Operation State Switching
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Solution Overview
Problem
Existing wireless communication systems lack the capability for fast and efficient adaptation of network operation states in time, frequency, spatial, and power domains, leading to inefficient energy consumption and limited flexibility in responding to varying traffic loads, with current methods requiring substantial signaling overhead and being impractical for quick transitions between operational states.
Innovation Solution
Implementing a method and apparatus for monitoring operation states in wireless communication systems by using DCI formats transmitted via PDCCH to indicate network operation states, allowing for fast adaptation across multiple cells, including the use of search space sets and physical layer signaling to minimize signaling overhead and enable quick transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional signaling methods are used to adapt network operation states, then reliability of state indication is maintained, but signaling overhead increases and adaptation speed decreases
Solution Approach 1:
The patent extracts the operation state indication from traditional higher-layer signaling and implements it through physical layer DCI formats. This separation allows the indication to be transmitted efficiently through the physical layer without burdening higher-layer protocols, thereby reducing overall signaling overhead while maintaining adaptation speed.
Solution Approach 2:
The patent introduces DCI formats as an intermediary mechanism between the network and UE for transmitting operation state indications. This intermediary allows compact encoding of state information that can be efficiently processed at the physical layer, reducing the signaling overhead compared to traditional RRC signaling while maintaining reliable delivery.
2Adaptability or versatility
If DCI formats with operation state indications are transmitted frequently, then adaptability of network operation states improves, but signaling overhead increases
Solution Approach 1:
The patent makes DCI formats multi-functional by embedding operation state indications within existing physical layer control structures. This allows the same DCI mechanism to serve both traditional scheduling functions and new operation state indication functions, improving adaptability without proportionally increasing signaling overhead.
Solution Approach 2:
The patent changes the encoding parameters of DCI formats to include operation state indication fields. By modifying the parameter structure of existing physical layer messages rather than creating entirely new signaling mechanisms, the system achieves improved adaptability with minimal increase in signaling overhead.
3Speed
If operation state transitions are made rapid, then responsiveness to traffic variations improves, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring of DCI formats by UEs for operation state indications. This periodic action allows the network to transition states rapidly when needed while UEs can enter low-power states between monitoring periods, improving responsiveness to traffic variations while managing energy consumption through structured periodic wake-up and monitoring cycles.
Data Source
AI summary
Methods and apparatuses for monitoring an indication of an operation state on a cell in a wireless communication system. A method for a user equipment (UE) includes receiving first information related to a list of parameters in one or more domains; receiving second information for a search space set for reception of physical downlink control channel (PDCCHs); and receiving a PDCCH from the PDCCHs. The list includes a number of sets of parameters corresponding to a first number of cells. The PDCCH provides a downlink control information (DCI) format that indicates a number of indexes. An index from the number of indexes is associated with a second number of cells from the first number of cells. The method further includes determining parameters on a cell from the second number of cells based on the index and receiving a channel or signal on the cell based on the parameters.