RIS SSB Forwarding for Blind-Spot Network Access
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Solution Overview
Problem
User equipment (UE) in blind spots or edge areas of a cell cannot access the network due to the lack of sidelink synchronization with the base station, as existing solutions do not effectively utilize dynamic reconfigurable intelligent meta-surfaces (RIS) to forward synchronization signal blocks (SSBs).
Innovation Solution
Implement a method where a dynamic RIS forwards SSBs with specific indexes corresponding to distinct node states, enabling multiple beams to scan and transmit SSBs to UEs in non-RRC-connected states, ensuring they can detect and access the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a dynamic RIS is used to forward broadcast signals, then coverage in blind spots and edge areas is improved, but the ability to detect SSB and access the network deteriorates due to lack of sidelink synchronization
Solution Approach 1:
The patent introduces an auxiliary node (RIS) as an intermediary to forward SSB between the base station and UE. The auxiliary node receives SSB from the base station, determines corresponding node states, and forwards them to the UE, enabling coverage extension while maintaining synchronization capability.
Solution Approach 2:
The patent changes the parameter of SSB indexing by introducing a target index that corresponds to node states of the auxiliary node. This allows the UE to identify and select the appropriate SSB that matches the current node state, ensuring reliable detection and network access.
2Measurement precision
If multiple SSBs are forwarded through RIS with different node states, then detection capability is improved, but system complexity increases
Solution Approach 1:
The patent segments the SSB forwarding process by associating different node states with different SSB indices. Each node state corresponds to a specific SSB index, allowing the system to handle multiple states through indexed segmentation rather than complex simultaneous management.
Solution Approach 2:
The patent uses indexing as a copy mechanism where the target index serves as a reference copy that maps UE reception to auxiliary node states. This simplifies the system by using index copying rather than direct state transmission, reducing complexity while maintaining detection precision.
Data Source
AI summary
Embodiments of the present disclosure provide an SSB transmission method and apparatus, and a storage medium. The method comprises: a terminal receives a target index SSB forwarded by a first secondary node, the target index SSB comprising one or more SSBs having a same index in a plurality of SSBs forwarded by the first secondary node, wherein in the plurality of SSBs forwarded by the first secondary node, the SSB indicated by each index corresponds to a node status of the first secondary node. According to the SSB transmission method and apparatus, and the storage medium provided in the embodiments of the present disclosure, status switching is performed by means of a secondary node, and an SSB indicated by each index corresponds to a node status of the secondary node, so that SSBs sent by a network device can be forwarded to a terminal by the secondary node in a scanning manner by using a plurality of beams, thereby ensuring that a terminal in a non-RRC connected state located in an area such as a cell blind area or a cell edge can detect the SSBs sent by the network device and then access a network normally.