AETHER Project · routing artifact · v0.1

Adaptive Mesh Routing — Pseudocode

The AETHER routing layer consists of three concurrent loops: (i) the per-packet forwarding decision, (ii) the on-device PPO policy update, and (iii) the federated weight aggregation across the mesh.

1. Per-packet forwarding

function selectNextHop(packet, neighbors):
    candidates = []
    for n in neighbors:
        score = w1 * signalQuality(n)
              + w2 * batteryHeadroom(n)
              + w3 * trustScore(n)
              + w4 * bandwidthAvailable(n)
              + w5 * (1 / predictedLatency(n))
              + w6 * mobilityAlignment(n, packet.dst)
              - w7 * congestion(n)
              - w8 * sybilRisk(n)
        candidates.push({ n, score })

    // Top-K multi-path forwarding with softmax probabilities
    topK = candidates.sortByScore().take(K = 2)
    p    = softmax([c.score for c in topK])
    return weightedSample(topK, p)

2. PPO update loop (on-device)

function ppoUpdate(trajectory):
    advantages = computeGAE(trajectory.rewards, trajectory.values, gamma=0.99, lambda=0.95)
    for epoch in 1..K_epochs:
        for batch in trajectory.minibatches(size=64):
            ratio        = pi(batch.action | batch.state) / pi_old(batch.action | batch.state)
            clipped      = clip(ratio, 1 - epsilon, 1 + epsilon)
            policy_loss  = -min(ratio * advantages, clipped * advantages).mean()
            value_loss   = mse(V(batch.state), batch.return)
            entropy_bonus = beta * entropy(pi(batch.state))
            loss = policy_loss + 0.5 * value_loss - entropy_bonus
            optimizer.step(loss)
    pi_old <- pi

3. Federated weight aggregation

function federatedUpdate(localGradient, peers):
    // Each peer encrypts its gradient under a homomorphic threshold key
    encShare = encrypt(localGradient, thresholdKey.shares[selfId])
    publish(encShare to gossip topic "ppo-grads")

    // Aggregator collects encrypted shares, sums them, threshold-decrypts
    if isAggregator():
        agg = encryptedSum(collectShares(quorum = 2/3))
        global = thresholdDecrypt(agg)
        broadcast(global, topic = "ppo-weights")

    // Each node applies the global update with trust weighting
    if onMessage("ppo-weights", weights, sender):
        if verifySignature(weights, sender) and reputation(sender) > tau:
            pi.weights = (1 - alpha) * pi.weights + alpha * weights

4. Weight semantics

© AETHER Project · routing pseudocode · draft v0.1