Obviousness

Obviousness Analysis under 35 U.S.C. § 103

This analysis identifies combinations of prior art references that would render the claims of US patent 8934922 obvious to a person having ordinary skill in the art (POSA). The primary prior art references considered are WO 00/27152 and US20020094801, both discussed in the background of US8934922.

Claim 1 of US8934922

Claim 1 describes a method for monitoring the presence of a mobile station in a special area. The method involves:

• A radio communication defining device transmitting a distinctive defining signal.
• The mobile station observing and processing signals to determine if it's a defining signal and a distinctive one for the special area.
• The mobile station sending an updating signal to a mobile telephone network about its presence.
• The mobile telephone network routing the updating signal to special operating means that adapt operating parameters based on the mobile station's presence.

The key characterizing feature, as stated in the claim, is: "the special area is associated to the mobile station by transmitting to the mobile station a checking data, this checking data being used by the mobile station for determining whether or not the defining signal received is a distinctive defining signal that defines, alone or with other distinctive defining signals, the special area associated to the mobile station and the same checking data being sent to any mobile station whose presence in this special area is monitored."

Combination of Prior Art: WO 00/27152 with General Knowledge of Mobile Network Provisioning

Primary Reference: WO 00/27152

WO 00/27152 discloses a system for locating a mobile station in a "home area" defined by a short-range radio signal broadcast from a "guide unit." The short-range radio signal contains the identity code of said mobile station, and the mobile station identifies its own identity code to determine its location in the home area. Upon identification, the mobile station transmits a "home message" to the mobile network, which can be used for defining price/service (i.e., adapting operating parameters).

WO 00/27152 provides several elements of Claim 1:

• Radio communication defining device transmits distinctive defining signal: The "guide unit" broadcasts a "short range radio signal which defines a home area."
• Mobile station observes and processes signals: The mobile station "has to identify its own identity code in order to notice to a mobile switching centre that it is located in its home area." This requires observing and processing the received signals.
• Mobile station sends an updating signal: The mobile station "transmits then a home message to the mobile network."
• Mobile telephone network routes updating signal to special operating means that adapt operating parameters: The home message is "possibly used notably for defining the price/service connected to telephone calls" by the "mobile switching centre" (part of the mobile network's operating means).

Motivation to Combine and Modify:

US8934922 itself explicitly highlights the drawback of WO 00/27152, stating that "the guide unit has to know the identity of the mobile station" and that this solution "does not allow the mobile network, to add for a mobile station one or more special areas... without having to at least modify one or more guide units broadcasting in such areas. It lacks therefore of flexibility." The patent further notes that for environments like airports or business centers with many mobile stations, storing and transmitting all mobile station identity codes from a single radio communication defining device would be "difficult or even impossible considering that the radio spectrum is a limited resource."

A person having ordinary skill in the art (POSA) would be motivated to overcome this identified problem of inflexibility and scalability in WO 00/27152. The core challenge is that the guide unit needs to maintain knowledge of individual mobile station identities. A common design principle in distributed systems, especially in mobile telecommunications, involves shifting intelligence and data storage to optimize resource usage and enhance flexibility.

Given the widespread knowledge of mobile networks' capabilities for over-the-air (OTA) provisioning and configuration management of mobile stations (e.g., via SMS, USSD, or SIM toolkit applications) at the priority date (March 28, 2006), a POSA would consider an alternative approach to identification.

Applying General Knowledge to Modify WO 00/27152:

To enhance the flexibility and scalability of WO 00/27152, a POSA would modify the identification mechanism as follows:

1. Broadcast a generic area identifier: Instead of the guide unit broadcasting individual mobile station identity codes, it would broadcast a generic identifier that represents the "special area" itself. This identifier would be common to all mobile stations authorized for that special area.
2. Provision mobile stations with "checking data": The mobile telephone network, using its existing provisioning capabilities, would transmit this "checking data" (the special area identifier) to the authorized mobile stations. The mobile station would then store this data in its internal memory.
3. Mobile station performs comparison: When a mobile station receives the broadcast signal from a guide unit, it would extract the generic area identifier from the signal and compare it with the "checking data" stored in its internal database. If a match occurs, the mobile station determines it is within the special area.
4. Same checking data for multiple users: By having the guide unit broadcast a single special area identifier and provisioning all authorized mobile stations with this same checking data, the system directly addresses the scalability issue where guide units would otherwise need to be updated with every mobile station's ID.

This modification directly leads to the characterizing feature of Claim 1 of US8934922: "transmitting to the mobile station a checking data, this checking data being used by the mobile station for determining whether or not the defining signal received is a distinctive defining signal that defines, alone or with other distinctive defining signals, the special area associated to the mobile station and the same checking data being sent to any mobile station whose presence in this special area is monitored." The motivation is clearly articulated as resolving the inflexibility and scalability limitations of WO 00/27152.

Conclusion on Obviousness:

Claim 1 of US8934922 would have been obvious in view of WO 00/27152 combined with general knowledge of mobile network provisioning and the explicit motivation to overcome the known scalability and flexibility issues of WO 00/27152. A POSA, recognizing the problems outlined in the background of US8934922 regarding WO 00/27152, would readily conceive of shifting the identification burden from the fixed radio device (guide unit) to the mobile station (by provisioning it with area identifiers) and the central mobile network, thus arriving at the claimed solution.