Obviousness

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

To establish obviousness under 35 U.S.C. § 103, it must be shown that "the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains." This analysis requires identifying a motivation to combine prior art references, which can come from the knowledge of those skilled in the art, from the prior art references themselves, or from the nature of the problem to be solved. Conclusory statements are insufficient; the rationale must explain why a skilled artisan would have combined specific elements from specific references in the way the claimed invention does.

Prior Art References:

1. Patent Document 1: Japanese Unexamined Patent Application Publication No. 2005-51314 (JP 2005-51314A). [cite: Patent Document 1, Patent Document 1: Japanese Unexamined Patent Application Publication No. 2005-51314, The above-described wireless LAN communication system has a problem in terms of a balance between convenience and security.]
   • Disclosure: This document describes a wireless LAN system where a client terminal connects to a wireless LAN access point. It addresses security by setting a time period during which the client terminal is allowed to connect to the access point, thereby controlling access based on time restrictions. [cite: Patent Document 1 describes that, in a wireless LAN system where a client terminal of a user and a communication device, which is a wireless LAN access point, wirelessly connect to each other, a time period in which the client terminal is allowed to connect to the access point is set, and security is ensured by a control based on this time restriction.]
   • Problem Addressed: The problem addressed by JP 2005-51314A is ensuring security in a wireless LAN system by controlling the connection time of client terminals.

Motivation to Combine and Obviousness:

The '088 patent aims to solve the problem of balancing convenience and security in a wireless LAN communication system, particularly when an external user's terminal temporarily connects to an internal organization's communication device. The goal is to allow temporary external use while preventing unauthorized, independent use after the temporary period. [cite: An object of the present invention is to provide a technology pertaining to a wireless LAN communication system, a communication device in the system, and the like, which can achieve convenience for a terminal of a user who is external to an organization to temporarily use the system and ensure security in such a case.]

A person having ordinary skill in the art (POSITA) in wireless LAN communication systems, prior to the filing date of US11026088 (August 29, 2014), would have been motivated to combine the teachings of JP 2005-51314A with common knowledge in the field to achieve the claimed invention.

Combination Rationale:

JP 2005-51314A teaches a wireless LAN system with a client terminal and an access point, where access is controlled by a time restriction to ensure security. [cite: Patent Document 1 describes that, in a wireless LAN system where a client terminal of a user and a communication device, which is a wireless LAN access point, wirelessly connect to each other, a time period in which the client terminal is allowed to connect to the access point is set, and security is ensured by a control based on this time restriction.] The '088 patent builds upon this by introducing a "first communication terminal device" (internal user) and a "second communication terminal device" (external user), where the second terminal's connection to the communication device (access point with display function) is granted under permission from the first communication terminal device. This permission is then periodically confirmed between the first terminal and the communication device, and if terminated, the second terminal's connection is likewise terminated.

A POSITA would have been motivated to enhance the security and manageability of wireless LAN access, especially for temporary external users, by integrating an explicit permission and ongoing confirmation mechanism. The problem of balancing convenience for temporary external use with security to prevent independent continued use is explicitly stated as a problem in the background of US11026088, indicating a known need in the field. [cite: The above-described wireless LAN communication system is assumed to encounter not only a situation where a terminal of a user who is internal to an organization connects to and uses a communication device which has an access point function, but also a situation where a terminal of a user who is external to the organization connects to and uses the same communication device., However, such a system has a possibility that a terminal of a user who is external to an organization can independently use the wireless LAN communication system inside the organization after a temporary use.]

The concept of a "first terminal" (e.g., an internal employee's device) granting and managing access for a "second terminal" (e.g., an external guest's device) is a logical extension of managing access control. Rather than relying solely on pre-set time limits as in JP 2005-51314A, a POSITA would recognize the benefit of dynamic, user-controlled permission, particularly in a corporate meeting setting where an internal host might grant temporary access to a guest. This provides immediate control and enhances security by tying the external user's access directly to the presence and explicit approval of an internal user.

Specifically, the following elements of US11026088 would be obvious in light of JP 2005-51314A and common knowledge:

• First and Second Communication Terminal Devices: It is a common scenario in organizational settings for both internal and external users to require network access. Designing a system that differentiates between these users and assigns different roles (e.g., internal user as a "sponsor" for external access) would be an obvious architectural decision for a POSITA seeking to manage network resources and security.
• Permission from the First Terminal: The idea of a trusted internal device granting permission to an untrusted external device is a well-understood security principle (e.g., a "host" grants access). This improves upon simple time-based restrictions by allowing for flexible, on-demand access that can be initiated and overseen by an authorized internal party.
• Confirmation of Permission: Periodically confirming the permission for the second terminal to connect and use the communication device (e.g., a projector with an access point function) directly addresses the problem of preventing independent use by the external user after temporary use. JP 2005-51314A already teaches time-based security. A POSITA would readily implement a mechanism to check if the permission remains active, rather than just a pre-defined time limit, especially if the internal user's device (the "first terminal") is the source of the permission. This would ensure that the external user's access is contingent on the ongoing approval or presence of the internal user.
• Termination of Connection upon Termination of Permission: This is a direct consequence of the confirmation step and a fundamental security measure. If permission is revoked or not renewed, the connection should be terminated. This is an obvious extension of the security control taught in JP 2005-51314A, which terminates connections based on time restrictions.

The motivation to combine these elements arises from the desire to create a more flexible, user-friendly, and secure wireless LAN system for mixed-user environments, directly addressing the "balance between convenience and security" problem outlined in US11026088. [cite: The above-described wireless LAN communication system has a problem in terms of a balance between convenience and security., An object of the present invention is to provide a technology pertaining to a wireless LAN communication system, a communication device in the system, and the like, which can achieve convenience for a terminal of a user who is external to an organization to temporarily use the system and ensure security in such a case.] A POSITA would have considered the need for dynamic control over temporary access, moving beyond static time limits to a system where an authorized internal user can directly influence the connection status of an external user's device.

Therefore, the combination of JP 2005-51314A with the common knowledge of a POSITA regarding network access control, user roles, and the need for dynamic security in mixed internal/external user environments would render the claims of US11026088 obvious.