// Wait for send credit
        if (!rdmaConnection.canSend()) {
            waitForSendCredit();
        }
        
        // Serialize request
        ByteBuffer requestBuffer = serializeRequest(request);
        
        // Register buffer if needed
        RdmaMemoryRegion sendRegion = bufferManager.getSendRegion(requestBuffer.remaining());
        sendRegion.getBuffer().put(requestBuffer);