diff --git a/src/decoder/gb28181/sip/SipServer.cpp b/src/decoder/gb28181/sip/SipServer.cpp
index 8220292..cf86dd1 100644
--- a/src/decoder/gb28181/sip/SipServer.cpp
+++ b/src/decoder/gb28181/sip/SipServer.cpp
@@ -124,7 +124,7 @@ int SipServer::sip_event_handle(eXosip_event_t *evtp) {
             this->clearClientMap();
             break;
         case EXOSIP_MESSAGE_NEW://23
-            LOG_INFO("EXOSIP_MESSAGE_NEW type={}",evtp->type);
+            // LOG_INFO("EXOSIP_MESSAGE_NEW type={}",evtp->type);
 
             if (MSG_IS_REGISTER(evtp->request)) {
                 this->response_register(evtp);
@@ -300,9 +300,18 @@ void SipServer::response_register(eXosip_event_t *evtp) {
 
             LOG_INFO("Camera registration succee,ip={},port={},device={}",client->getIp(),client->getPort(),client->getDevice());
 
+            std::lock_guard<std::mutex> l(m_client_map_mtx);
+
+            auto it_client = mClientMap.find(client->getDevice());
+            if (it_client != mClientMap.end()) {
+                Client* c = it_client->second;
+                delete c;
+                c = nullptr;
+                mClientMap.erase(it_client);
+            }
+            
             mClientMap.insert(std::make_pair(client->getDevice(),client));
 
-            //this->request_invite(client);
             // NVR注册成功，立即请求设备目录
             RequestCatalog(client);
 
@@ -370,14 +379,14 @@ void SipServer::response_message(eXosip_event_t *evtp) {
         parse_xml(body->body, "<DeviceID>", false, "</DeviceID>", false, DeviceID);
     }
 
-    // LOG_INFO("CmdType={},DeviceID={}", CmdType, DeviceID);
-
     if(!strcmp(CmdType, "Catalog")) {
         this->response_message_answer(evtp,200);
         // 需要根据对方的Catelog请求，做一些相应的应答请求
         CCatalogParser catPaser;
         std::vector<DeviceInfo>  vec_device = catPaser.Decode_Catlog(body->body);
         printDevice(vec_device);
+
+        std::lock_guard<std::mutex> l(m_device_map_mtx);
         for (size_t i = 0; i < vec_device.size(); i++) {
             DeviceInfo info = vec_device[i];
             m_device_map[info.id] = info;
@@ -385,12 +394,19 @@ void SipServer::response_message(eXosip_event_t *evtp) {
     }
     else if(!strcmp(CmdType, "Keepalive")){
         this->response_message_answer(evtp,200);
+        // LOG_INFO("CmdType={},DeviceID={}", CmdType, DeviceID);
+        std::lock_guard<std::mutex> l_c(m_client_map_mtx);
+        Client* client = mClientMap[DeviceID];
+        if (client != nullptr) {
+            client->updateHeartBeat(UtilTools::get_cur_time_ms());
+        }
     }else{
         this->response_message_answer(evtp,200);
     }
 }
 
 bool SipServer::check_device_status(string id) {
+    std::lock_guard<std::mutex> l(m_device_map_mtx);
     auto it_info = m_device_map.find(id);
     if (it_info == m_device_map.end()) {
         return false;
@@ -407,11 +423,14 @@ bool SipServer::check_device_status(string id) {
 }
 
 Client* SipServer::get_parent_by_id(string id) {
+    std::lock_guard<std::mutex> l(m_device_map_mtx);
     auto it_info = m_device_map.find(id);
     if (it_info == m_device_map.end()) {
         return nullptr;
     }
     string parent_id = it_info->second.parentid;
+
+    std::lock_guard<std::mutex> l_c(m_client_map_mtx);
     auto it_client = mClientMap.find(parent_id);
     if (it_client == mClientMap.end()) {
         return nullptr;
@@ -564,6 +583,9 @@ int SipServer::RequestInvite_TCP_a(const char* dst_channel, int rtpPort) {
 }
 
 void SipServer::cacheCatalog() {
+
+    std::lock_guard<std::mutex> l(m_client_map_mtx);
+
     if (mClientMap.size() <= 0){
         cout << "no IPC" << endl;
         return ;
@@ -608,6 +630,7 @@ void SipServer::RequestCatalog(Client* client) {
 }
 
 int SipServer::clearClientMap(){
+    std::lock_guard<std::mutex> l(m_client_map_mtx);
     for (auto iter=mClientMap.begin(); iter!=mClientMap.end(); iter++) {
         delete iter->second;
         iter->second = nullptr;
@@ -618,6 +641,7 @@ int SipServer::clearClientMap(){
 }
 
 void SipServer::deleteClientByDevice(string device) {
+    std::lock_guard<std::mutex> l(m_client_map_mtx);
     auto it = mClientMap.find(device);
     if (it == mClientMap.end()) {
         return ;
diff --git a/src/decoder/gb28181/sip/SipServer.h b/src/decoder/gb28181/sip/SipServer.h
index 71a0daf..1332fb5 100644
--- a/src/decoder/gb28181/sip/SipServer.h
+++ b/src/decoder/gb28181/sip/SipServer.h
@@ -14,6 +14,7 @@ extern "C" {
 #include <string>
 #include <thread>
 #include <chrono>
+#include <mutex>
 
 #include "./Message/CatalogParser.h"
 
@@ -101,15 +102,21 @@ public:
         return mPort;
     }
 
+    unsigned long getHeartBeat() {
+        return mHeartBeatTime;
+    }
+
+    void updateHeartBeat(unsigned long ts) {
+        mHeartBeatTime = ts;
+    }
+
 private:
-    // step1
     string mIp; // client ip
     int mPort; // client port
     string mDevice;// 340200000013200000024
-    // step2
     bool mIsReg;
-    // step3
-    int mRtpPort{};
+    int mRtpPort;
+    unsigned long mHeartBeatTime{0};
 
 };
 
@@ -169,7 +176,9 @@ private:
     ServerInfo mInfo;
 
     std::map<std::string, Client *> mClientMap;// <DeviceID,SipClient>
+    mutex m_client_map_mtx;
     std::map<std::string, DeviceInfo> m_device_map;
+    mutex m_device_map_mtx;
 
     thread* m_event_loop_thread;
 };