>>10
次世代通信にはオープンアーキテクチャを使う点ではアメリカも日本も変わらないようです。
まだ全体像の把握が不十分なのでこれ以上の断言は避けますが、これまでの常識に縛られる
事もまた事実を見失う事につながりますよ。

Northrop to prototype communications gateway for fifth-generation fighters
By Greg Waldron4 May 2020
https://www.flightglobal.com/fixed-wing/northrop-to-prototype-communications-gateway-for-fifth-generation-fighters/138198.article

Northrop Grumman will develop the prototype of a new system that enables improved
communications among diverse platforms.

The company labels the system gatewayOne, and is undertaking the work under
the US Air Force’s (USAF’s) Advanced Battle Management System (ABMS)
effort, following a contract with the service’s Life Cycle Management Center.

“Northrop Grumman is providing engineering, management and technical assistance
for the air force’s integration of net-centric 5th-to-5th generation aircraft communications
capabilities and other platforms into a modular, open-architecture gateway,” says the company.