Scrambling Timing Advance Values in Wireless Positioning

The patent applies parameter changes by modifying the timing advance value through addition of a scrambling code specific to each cell. This transforms the original timing advance parameter into a scrambled version that maintains functional utility for authorized users while becoming unusable for unauthorized positioning attempts, thereby resolving the contradiction between enabling positioning and preventing abuse

The patent extracts and identifies fake positioning accesses by detecting whether a mobile station is requesting timing advance information without proper authorization. By separating these fake accesses from legitimate ones, the system can apply different handling strategies - processing legitimate accesses normally while rejecting or minimizing resource allocation for fake accesses, thus resolving the contradiction between comprehensive access handling and resource conservation

The patent applies preliminary anti-action by implementing mechanisms that prevent fake positioning accesses from establishing hanging signalling channels in the first place. Through authentication checks and proper channel management protocols, the system anticipates and blocks unauthorized accesses before they can consume channel resources, thereby resolving the contradiction between maintaining communication reliability and preventing channel hanging

The patent applies preliminary action by scrambling the timing advance values with cell-specific codes before transmitting them to mobile stations. This preliminary transformation ensures that even if unauthorized stations intercept the values, they cannot use them for positioning without the proper scrambling code. Authorized users can still retrieve accurate positioning information through proper authentication, thus resolving the contradiction between providing positioning accuracy and preventing unauthorized usage