Wireless Terminal Candidate Link Search with Dynamic Offset
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, especially in beam-based systems like New Radio (NR), wireless terminals face inefficiencies in locating candidate links due to static signaling and unsynchronized network deployments, leading to increased resource usage, power consumption, and potential handover failures.
Innovation Solution
A method for a wireless terminal to locate candidate links by obtaining search limitation data, setting search limitations based on this data, and searching for links starting with a current link setting, gradually expanding the search with time and frequency offsets until the limitations are met, thereby reducing unnecessary synchronization efforts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless terminal performs continuous reference signal search over a predefined time/frequency search window to detect candidate beams/cells, then the terminal can detect all audible beams/cells, but the synchronization effort and resource usage increase significantly
Solution Approach 1:
The network node performs preliminary actions by determining and signaling a reduced search window configuration to the terminal before the terminal executes the search. This pre-provided information allows the terminal to limit its search to only necessary time-frequency resources, avoiding exhaustive search while still detecting all relevant candidate beams/cells
Solution Approach 2:
Instead of applying a uniform search strategy across the entire time-frequency space, the patent applies local quality by configuring a reduced search window specifically in the time-frequency regions where candidate signals are likely to be found. The search window is tailored to local conditions (network deployment pattern, synchronization status) rather than covering all possible regions
2Use of energy by moving object
If the network provides detailed candidate beam information to the terminal, then the terminal can focus its search and reduce effort, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent changes the parameter of search window configuration from a fixed predefined size to a dynamically adjusted reduced size. The network node determines appropriate search window parameters based on deployment patterns and signals these parameters to the terminal, allowing the terminal to adapt its search effort to actual network conditions without requiring complex candidate beam lists
3Measurement precision
If static CRS signaling is used in legacy systems, then the reference signals are easy to measure and yield consistent results, but resource usage, power consumption and inter-cell interference increase
Solution Approach 1:
The patent introduces dynamics by replacing static CRS signaling with dynamic reduced search window configuration. Instead of continuously transmitting reference signals across the entire bandwidth, the network dynamically configures terminals to search only in specific time-frequency regions where signals are present, enabling measurement consistency while reducing overall resource usage and power consumption
Solution Approach 2:
The patent segments the continuous reference signal transmission into discrete, localized segments within reduced search windows. Rather than broadcasting CRS across the entire bandwidth continuously, reference signals are transmitted in specific segments, and terminals are configured to search only in corresponding segmented regions, reducing total resource consumption while maintaining measurement capability
Data Source
AI summary
A link locating assisting device in a wireless communication network (10) obtains search limitation data concerning the wireless communication network and sends the search limitation data (SLD) to the wireless terminal (12) via a serving network node (14) and a serving link (SLK) for use in obtaining limitations for limiting a search for a set of candidate links (CLK1, CLK2, CLK3). The wireless terminal (12) obtains the search limitation data (SLD), sets limitations for a link search based on the search limitation data, search for candidate links starting with a current link search setting used with the serving link (SLK), and continues searching for candidate links with an offset from the current link search setting that grows with every search until the search limitations have been met.