Base Station Cell Reselection Parameters for Public Safety Terminals
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Solution Overview
Problem
PS-LTE terminals in idle mode experience buffering and frequent cell reselection when moved between cells, leading to delayed data decoding and increased buffering, especially in public safety network services.
Innovation Solution
The base station adjusts cell reselection configuration parameters, such as hysteresis and offset information, to minimize frequent cell reselections and optimize cell reselection for PS-LTE terminals, allowing them to remain in the serving cell longer without affecting paging performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PS-LTE terminals perform frequent cell reselection in idle mode, then they can maintain optimal connection quality, but buffering increases and data decoding is delayed
Solution Approach 1:
The patent applies parameter changes by introducing a dedicated hysteresis parameter (q-Hyst-PS) and offset parameter (q-OffsetCell-PS) specifically for PS-LTE terminals. These parameters modify the cell reselection criteria to reduce frequent reselections, thereby decreasing buffering and data decoding delay while maintaining connection quality reliability
2Loss of time
If cell reselection parameters are adjusted to reduce frequent reselections, then buffering is reduced, but paging performance may be affected
Solution Approach 1:
The patent applies local quality by providing separate cell reselection parameters specifically for PS-LTE terminals (q-Hyst-PS and q-OffsetCell-PS) rather than using uniform parameters for all terminals. This localized parameter configuration reduces buffering for PS-LTE terminals while maintaining appropriate paging performance through terminal-type specific optimization
Data Source
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AI summary
An embodiment of the present invention relates to a method for transmitting, by a base station, information in a wireless communication system, and a base station performing the same, the method comprising the steps of: generating a system information block comprising first hysteresis information about a first type terminal, and second hysteresis information about a second type terminal; and broadcasting the generated system information block, wherein the first type terminal includes a terminal which does not provide a public safety network service, and wherein the second type terminal includes a terminal which provides a public safety network service. In addition, the present invention relates to a terminal which operates with the base station, and a method for operating the terminal.