diff --git a/src/game_cache.rs b/src/game_cache.rs
index fcb0c53..a61c365 100644
--- a/src/game_cache.rs
+++ b/src/game_cache.rs
@@ -1,5 +1,7 @@
 use std::collections::{HashMap, VecDeque};
 use std::fmt::Debug;
+use std::sync::Arc;
+use tokio::sync::Mutex;
 
 const CACHE_SIZE: usize = 256;
 
@@ -96,10 +98,10 @@ pub struct FrameResult {
 }
 
 /// Represents the game data processor for handling inputs and outputs.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct GameDataProcessor {
     /// Map of connected clients.
-    clients: HashMap<u32, Box<dyn ClientTrait>>,
+    clients: HashMap<u32, Arc<Mutex<dyn ClientTrait>>>,
     /// Global cache for aggregated game data.
     aggregated_cache: GameCache,
     /// Current frame index.
@@ -122,34 +124,41 @@ impl GameDataProcessor {
 
     #[allow(dead_code)]
     /// Adds a new client to the processor.
-    fn add_client(&mut self, client_id: u32, client: Box<dyn ClientTrait>) {
+    pub fn add_client(&mut self, client_id: u32, client: Arc<Mutex<dyn ClientTrait>>) {
         self.clients.insert(client_id, client);
     }
 
-    #[allow(dead_code)]
     /// Processes incoming game data from a client.
     /// Stores the data in the client's pending inputs.
-    fn process_incoming(&mut self, client_id: u32, data: Vec<u8>) {
-        let client = self.clients.get_mut(&client_id).expect("Client not found");
+    pub async fn process_incoming(&mut self, client_id: u32, data: Vec<u8>) {
+        let client = self.clients.get(&client_id).expect("Client not found");
+        let mut client = client.lock().await;
         client.handle_incoming(data);
     }
 
-    #[allow(dead_code)]
     /// Processes a frame if inputs from all clients are available.
     /// Returns Some(FrameResult) if the frame was processed.
-    pub fn process_frame(&mut self) -> Option<FrameResult> {
+    pub async fn process_frame(&mut self) -> Option<FrameResult> {
         let mut frame_data = Vec::new();
 
-        let all_clients_have_input = self
-            .clients
-            .values()
-            .all(|client| client.has_pending_input());
+        let all_clients_have_input = {
+            let mut all_have_input = true;
+            for client in self.clients.values() {
+                let client = client.lock().await;
+                if !client.has_pending_input() {
+                    all_have_input = false;
+                    break;
+                }
+            }
+            all_have_input
+        };
 
         if !all_clients_have_input {
             return None;
         }
 
-        for (&client_id, client) in &mut self.clients {
+        for (&client_id, client) in &self.clients {
+            let mut client = client.lock().await;
             let input = client.get_next_input().expect("Input should be available");
             frame_data.extend(input.clone());
             self.frame_inputs
@@ -228,13 +237,13 @@ mod tests {
         }
     }
 
-    #[test]
-    fn test_game_data_processing_async() {
+    #[tokio::test]
+    async fn test_game_data_processing_async() {
         let mut processor = GameDataProcessor::new();
 
         // Simulate two clients connecting.
-        processor.add_client(1, Box::new(MockClient::new(1))); // Client ID 1
-        processor.add_client(2, Box::new(MockClient::new(2))); // Client ID 2
+        processor.add_client(1, Arc::new(Mutex::new(MockClient::new(1))));
+        processor.add_client(2, Arc::new(Mutex::new(MockClient::new(2))));
 
         // Expected cache usage and positions per frame.
         let expected_results = [
@@ -265,10 +274,10 @@ mod tests {
         let mut frame_results = Vec::new();
 
         for (client_id, input) in inputs {
-            processor.process_incoming(client_id, input);
+            processor.process_incoming(client_id, input).await;
 
             // Attempt to process frames as inputs become available.
-            while let Some(frame_result) = processor.process_frame() {
+            while let Some(frame_result) = processor.process_frame().await {
                 frames_processed += 1;
                 frame_results.push(frame_result);
             }
@@ -282,6 +291,10 @@ mod tests {
         // Perform assertions on the frame results.
         for (i, frame_result) in frame_results.iter().enumerate() {
             let (exp_use_cache, exp_cache_pos) = expected_results[i];
+            println!(
+                "send to bytes: {}: {:?}",
+                frame_result.use_cache, frame_result.data_to_send
+            );
             assert_eq!(
                 frame_result.use_cache,
                 exp_use_cache,
diff --git a/src/handlers/create_game.rs b/src/handlers/create_game.rs
index 5cdce89..cf8ca48 100644
--- a/src/handlers/create_game.rs
+++ b/src/handlers/create_game.rs
@@ -55,6 +55,7 @@ pub async fn handle_create_game(
         max_players: 4,
         game_status: 0, // Waiting
         players,
+        processor: game_cache::GameDataProcessor::new(),
     };
 
     // Add game to games list
diff --git a/src/handlers/data.rs b/src/handlers/data.rs
index cdced45..0723ac7 100644
--- a/src/handlers/data.rs
+++ b/src/handlers/data.rs
@@ -60,7 +60,7 @@ impl crate::game_cache::ClientTrait for ClientInfo {
     }
 }
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct GameInfo {
     pub game_id: u32,
     pub game_name: String,
@@ -70,4 +70,5 @@ pub struct GameInfo {
     pub max_players: u8,
     pub game_status: u8,                        // 0=Waiting, 1=Playing, 2=Netsync
     pub players: HashSet<std::net::SocketAddr>, // 이 필드 추가
+    pub processor: crate::game_cache::GameDataProcessor, // GameDataProcessor 추가
 }
diff --git a/src/handlers/handlerf.rs b/src/handlers/handlerf.rs
index beb49c7..a57ee4d 100644
--- a/src/handlers/handlerf.rs
+++ b/src/handlers/handlerf.rs
@@ -6,6 +6,8 @@ use std::sync::Arc;
 use std::time::Instant;
 use tokio::sync::{mpsc, Mutex};
 
+use crate::game_cache::ClientTrait;
+use crate::game_cache::GameDataProcessor;
 use crate::packet_history::PacketHistory;
 use crate::*;
 
@@ -287,52 +289,45 @@ pub async fn handle_game_data(
 ) -> Result<(), Box<dyn Error>> {
     let mut buf = BytesMut::from(&message.data[..]);
     let _ = buf.get_u8(); // Empty String
-    let length_of_game_data = buf.get_u16_le();
-    let game_data = buf.split_to(length_of_game_data as usize).to_vec();
+    let data_length = buf.get_u16_le() as usize;
+    let game_data = buf.split_to(data_length).to_vec();
 
-    let (client_info_clone, game_info_clone) = {
-        let mut clients_lock = clients.lock().await;
-        let client_info = match clients_lock.get_mut(src) {
-            Some(client_info) => client_info,
-            None => {
-                eprintln!("Client not found during ready to play signal: addr={}", src);
-                return Ok(());
-            }
-        };
-        let client_info_clone = client_info.clone();
+    let game_id = {
+        let clients_lock = clients.lock().await;
+        let client_info = clients_lock.get(src).ok_or("Client not found")?;
+        client_info.game_id.ok_or("Game ID not found")?
+    };
 
-        let mut games_lock = games.lock().await;
-        let game_id = match client_info.game_id {
-            Some(game_id) => game_id,
-            None => {
-                eprintln!(
-                    "Game ID not found during ready to play signal: addr={}",
-                    src
-                );
-                return Ok(());
-            }
-        };
-        let game_info = match games_lock.get_mut(&game_id) {
-            Some(game_info) => game_info,
-            None => {
-                eprintln!(
-                    "Game not found during ready to play signal: game_id={}",
-                    game_id,
-                );
-                return Ok(());
-            }
-        };
-        let game_info_clone = game_info.clone();
+    let mut games_lock = games.lock().await;
+    let game_info = games_lock.get_mut(&game_id).ok_or("Game not found")?;
 
-        (client_info_clone, game_info_clone)
+    let user_id = {
+        let clients_lock = clients.lock().await;
+        let client_info = clients_lock.get(src).expect("Client not found");
+        client_info.user_id
     };
-    for player_addr in game_info_clone.players.iter() {
-        let mut data = BytesMut::new();
-        data.put_u8(0);
-        data.put_u16_le(length_of_game_data);
-        data.put(&game_data[..]);
-        util::send_packet(&tx, &packet_history, player_addr, 0x12, data.to_vec()).await?;
+    game_info
+        .processor
+        .process_incoming(user_id as u32, game_data.clone())
+        .await;
+
+    if let Some(frame_result) = game_info.processor.process_frame().await {
+        let data_to_send = if frame_result.use_cache {
+            vec![frame_result.cache_pos]
+        } else {
+            frame_result.data_to_send.clone()
+        };
+
+        util::send_packet(
+            &tx,
+            &packet_history,
+            src,
+            if frame_result.use_cache { 0x13 } else { 0x12 },
+            data_to_send,
+        )
+        .await?;
     }
+
     Ok(())
 }
 
@@ -340,6 +335,59 @@ pub async fn handle_game_cache(
     message: kaillera::protocol::ParsedMessage,
     src: &std::net::SocketAddr,
     tx: mpsc::Sender<Message>,
+    clients: Arc<Mutex<HashMap<std::net::SocketAddr, ClientInfo>>>,
+    games: Arc<Mutex<HashMap<u32, GameInfo>>>,
+    packet_history: Arc<PacketHistory>,
 ) -> Result<(), Box<dyn Error>> {
+    let mut buf = BytesMut::from(&message.data[..]);
+    let _ = buf.get_u8(); // Empty String
+    let cache_position = buf.get_u8();
+
+    let game_id = {
+        let clients_lock = clients.lock().await;
+        let client_info = clients_lock.get(src).ok_or("Client not found")?;
+        client_info.game_id.ok_or("Game ID not found")?
+    };
+
+    let mut games_lock = games.lock().await;
+    let game_info = games_lock.get_mut(&game_id).ok_or("Game not found")?;
+
+    let client_id = {
+        let clients_lock = clients.lock().await;
+        let client = clients_lock.get(src).expect("Client not found");
+        client.id()
+    };
+    let cached_data = {
+        let mut clients_lock = clients.lock().await;
+        let client = clients_lock.get_mut(src).expect("Client not found");
+        // client.id()
+        let receive_cache = client.get_receive_cache();
+        receive_cache.get(cache_position).cloned()
+    };
+
+    if let Some(data) = cached_data {
+        game_info
+            .processor
+            .process_incoming(client_id, data.clone())
+            .await;
+
+        if let Some(frame_result) = game_info.processor.process_frame().await {
+            let data_to_send = if frame_result.use_cache {
+                vec![frame_result.cache_pos]
+            } else {
+                frame_result.data_to_send.clone()
+            };
+
+            util::send_packet(
+                &tx,
+                &packet_history,
+                src,
+                if frame_result.use_cache { 0x13 } else { 0x12 },
+                data_to_send,
+            )
+            .await?;
+        }
+    }
+
     Ok(())
 }