Network Node Access Information Broadcast via Demodulation Reference Signal
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Solution Overview
Problem
Current radio networks face challenges in achieving flexible use of different access parameters based on traffic situations, leading to suboptimal performance and increased energy consumption due to the need for broadcasting the same access information across large areas.
Innovation Solution
Implementing a method where network nodes broadcast access information using a demodulation reference signal from a set of predefined signals, accompanied by a synchronization signal with a predefined mapping to multiple candidate demodulation reference signals, allowing wireless devices to demodulate and derive valid access parameters based on the received synchronization signal, enabling dynamic adaptation of access parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same access information is broadcasted across large areas to ensure coverage, then reliability of access information delivery is improved, but energy consumption increases significantly
Solution Approach 1:
The patent applies local quality by allowing different network nodes to use different demodulation reference signals (DMRS) within the same geographic area. Each DMRS is associated with specific access parameters, enabling network nodes to broadcast locally optimized access information tailored to their specific traffic conditions and coverage areas, rather than forcing a uniform broadcast across the entire large area.
Solution Approach 2:
The patent segments the broadcast information by associating different DMRS with different access parameter sets. This segmentation allows the network to divide the access information into multiple versions, each optimized for specific conditions, and enables wireless devices to selectively receive only the relevant segment corresponding to their needs, reducing overall broadcasting energy requirements.
2Adaptability or versatility
If access parameters are fixed for large area coverage, then device compatibility is improved, but adaptability to different traffic situations deteriorates
Solution Approach 1:
The patent introduces demodulation reference signals (DMRS) as intermediaries between the network nodes and wireless devices. Each DMRS serves as a marker that indicates which set of access parameters should be used. This intermediary mechanism allows wireless devices to automatically identify and apply the correct parameter set without complex manual configuration, thereby maintaining device compatibility while enabling adaptability to different traffic situations.
Solution Approach 2:
The patent enables parameter changes by associating different DMRS with different access parameter sets. When traffic conditions change, network nodes can switch between different DMRS, which in turn changes the access parameters broadcast to wireless devices. This allows dynamic adaptation to varying traffic situations while keeping the implementation relatively simple through the DMRS parameter indication mechanism.
Data Source
AI summary
A radio network (600) comprising at least one network node (604) broadcasts access information (AIT) comprising a range of access parameters, using a demodulation reference signal (RS4) out of a set of predefined demodulation reference signals. The radio network (600) also transmits a synchronization signal (SSI 7) associated with a predefined mapping to at least two candidate demodulation reference signals including the demodulation reference signal used for broadcasting the access information. Thereby, a wireless device (602) receiving the synchronization signal is able to demodulate the broadcasted access information and derive valid access related parameters therefrom, based on the synchronization signal (SSI 7).