Apollo was an advanced missile system developed by the Star Kingdom of Manticore in the early 20th Century PD.
In this revolutionary system, the salvo from a single missile pod contained two types of missiles; eight of the missiles were standard Mark 23 three-stage MDMs with a variety of warheads and ECM. The second type was a single larger Mark 23-E missile fitted with a faster-than-light telemetry link instead of a warhead; this missile acted as a control node for the other eight missiles in the pod and allowed a Keyhole II equipped ship to provide effectively real-time control to the missiles across their range envelope, resulting in exceptional accuracy and ECM resistance. If the Apollo missile were destroyed, the rest of the cluster could continue on with whatever their last telemetry had given them.
The Apollo control missile could also analyze the readings from the sensors on its clutch of missiles, and report back via FTL to the Keyhole II platforms, essentially allowing it to act as a high-speed recon platform as well. A tactic developed by Battlecruiser Squadron 106 was to fire two extra pods, one ahead of the salvo, and one behind the salvo. The initial clutch would act as the recon platform, allowing them to both confirm their targets, and refine targeting data (since most ship-based sensors would be far out of range for precise targeting), while the follow-up clutch would be in position to observe the actions of the main salvo, allowing a ship commander real-time analysis of the enemy's battle-damage.
A system-defense Apollo variant, the Mark 23-F, was developed for the new four-stage Mark 25. (HH11, SI2)
Okay. An idea to increase the number of control links by a geometric factor, through propagation. Let's turn the Apollo system on its ear.
For sake of argument, let's say that our Keyhole II equipped ship only has control links to manage 10 pods of launched missiles. (10x9 = 90 missiles). That is a limitation of 10 control missiles. But the 10 Apollo control missiles(that are receiving FTL input) are each in turn communicating with and controlling eight other dumb missiles.
But after the ACM receives FTL updated info from a Keyhole II ship, it is relegated to a dumb conversation across the board. At no point does an ACM get to communicate with another ACM. It never gets a chance to communicate with a peer. This is where I perceive of an easily aquired measure of improvement. All launches could be staggered, whereas a single ACM, let's call it a PACM(propogation ACM) is launched very close to a our regular maximum control link salvo of 8 pods(than the normal 10). Yet this single ACM is the only ACM that communicates with the ship, and it, in turn, communicates to eight other ACMs (rather than eight dumb missiles) which then propogates the signal down to their eight dumb missiles. This increases the maximum number of control links by a factor of eight, simply by altering the paradigm. No additional tech is needed beyond reprogramming of the PACM, perhaps, and I say perhaps because an individual ACM wouldn't care if it was acting as an ACM or a PACM, therefore wouldn't care whether it was communicating with eight other ACMs or eight dumb missiles.
And real time control of all missiles would remain in effect, because the PACM(Propagation ACM) remains negligibly close to the other ACMs).
Effective control link multiplication via propagation.
A potential problem is the maximum communication range between the ACM and other dumb missiles, which would translate to ACM to ACM. If that is a weak point, then a signal boosting missile can be used in place of a an attack missile. Still a significant threat multiplier.
There may be inherent problems with this approach, but I think it sound enough to merit R&D.
Rebuttal?
Note:
This all hinges on my limited understanding of what's going on.
