Synchronization Signal Sequence Generation for Node Identification
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Solution Overview
Problem
In multi-node wireless communication systems, existing methods fail to efficiently transmit node identifiers to user equipment without increasing system overhead, which is necessary for effective signal synchronization and resource management.
Innovation Solution
A method and apparatus for transmitting a synchronization signal that includes generating a synchronization signal sequence based on a node identifier and mapping it to a resource element, allowing the signal to be transmitted through multiple nodes, with the sequence being generated using seed numbers related to the node or base station identifier, and allocated to specific subcarriers in the frequency domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If node identifiers are transmitted using existing methods, then system overhead increases, but node identification capability is insufficient
Solution Approach 1:
The patent combines node identification information with the synchronization signal by generating the synchronization signal sequence using node-specific seed numbers (NID1, NID2). This merging allows the synchronization signal to simultaneously perform its original function of time/frequency synchronization and the additional function of conveying node identity, thereby improving node identification capability without increasing system overhead
Solution Approach 2:
The synchronization signal is designed to serve multiple functions: it provides time synchronization, frequency synchronization, and node identification all through a single signal transmission. By making the synchronization signal multi-functional, the system avoids the need for separate dedicated identification signals, thus preventing overhead increase while enhancing identification capability
2Loss of information
If synchronization signal sequence is generated using node-specific seed numbers, then node identification is enabled, but sequence generation complexity increases
Solution Approach 1:
The patent changes the parameter used for sequence generation from cell-specific identifiers to node-specific seed numbers (NID1, NID2). By modifying this fundamental parameter, the system enables node identification through the synchronization signal while maintaining the existing sequence generation framework, thus avoiding significant increases in generation complexity
Data Source
AI summary
A method of transmitting a synchronization signal in a multi-node system having a plurality of nodes and a base station for controlling the plurality of node is provided. The method includes: generating a synchronization signal sequence; and mapping the generated synchronization signal sequence to a resource element, and thereafter transmitting the mapped synchronization signal sequence to a user equipment via at least one node among the plurality of nodes, wherein the synchronization signal sequence is generated based on an identifier (ID) of a transmission node for transmitting the synchronization signal sequence.