Wireless Device Search Space Adaptation for Energy Efficiency
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Solution Overview
Problem
Current wireless communication networks face inefficiencies in energy consumption and resource usage due to the reliance on always-on reference signals for synchronization, which is undesirable for energy efficiency and interference reasons, and the need for wireless devices to perform numerous decoding attempts in future systems like 5G, leading to significant resource consumption.
Innovation Solution
A method where a wireless device determines a search space for a physical control channel based on the success of receiving a synchronization signal, only configuring the first search space if the signal is successfully received, thereby reducing complexity and resource consumption by avoiding unnecessary decoding attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless devices perform numerous decoding attempts in future systems like 5G, then the capability to receive control messages from multiple network nodes is improved, but resource consumption and device complexity increase significantly
Solution Approach 1:
The patent applies dynamics by making the search space determination adaptive rather than static. The wireless device dynamically determines whether to use a first search space or a second search space based on whether a synchronization signal is detected. This dynamic adaptation allows the device to handle multiple network nodes when needed while avoiding unnecessary complexity when not needed, resolving the contradiction between versatility and device complexity.
2Adaptability or versatility
If wireless devices perform numerous decoding attempts in future systems like 5G, then the capability to receive control messages from multiple network nodes is improved, but resource consumption increases
Solution Approach 1:
The patent applies dynamics by making the search space determination adaptive rather than static. The wireless device dynamically determines whether to use a first search space or a second search space based on whether a synchronization signal is detected. This dynamic adaptation allows the device to handle multiple network nodes when needed while avoiding unnecessary complexity when not needed, resolving the contradiction between versatility and device complexity.
3Reliability
If always-on reference signals are used for synchronization, then synchronization accuracy is maintained, but energy efficiency deteriorates and interference increases
Solution Approach 1:
The patent applies periodic action by using synchronization signals that are transmitted periodically rather than continuously. The network node transmits synchronization signals at specific intervals, and the wireless device attempts to detect these periodic signals. This approach maintains synchronization accuracy when signals are present while significantly improving energy efficiency by eliminating the need for always-on reference signals.
4Reliability
If always-on reference signals are used for synchronization, then synchronization accuracy is maintained, but interference increases
Solution Approach 1:
The patent applies periodic action by using synchronization signals that are transmitted periodically rather than continuously. The network node transmits synchronization signals at specific intervals, and the wireless device attempts to detect these periodic signals. This approach maintains synchronization accuracy when signals are present while significantly improving energy efficiency by eliminating the need for always-on reference signals.
Data Source
AI summary
A method performed by a wireless device for determining a search space for a physical control channel in a wireless communications network is provided. The wireless device is configured with a first search space of a physical control channel which first search space is associated with a first synchronization signal. The wireless device attempts to receive the first synchronization signal from a first network node. The wireless device then determines a search space for a physical control channel based on whether or not the attempt to receive said first synchronization signal was successful. When the attempt to receive said first synchronization signal was successful determining a first search space for the physical control channel, and when the attempt to receive said first synchronization signal was not successful determining a second search space for any one or more out of: the physical control channel and a second physical control channel.