diff --git a/packages/constants/README.md b/packages/constants/README.md
index 128e1d41ec1439906250c4e91127fd5b57fec3b7..1e6ac25d7cadbeb8c7403765d9b101afc9caa8f8 100755
--- a/packages/constants/README.md
+++ b/packages/constants/README.md
@@ -93,6 +93,8 @@ non-javascript to develop your tool. You can also use the included `constants.js
 - LOGIN_EVENT_NAME
 - LOGOUT_EVENT_NAME
 - DISCONNECT_EVENT_NAME
+- INTER_COM_EVENT_NAME
+- INTER_COM_EVENT_NAMES
 - WS_REPLY_TYPE
 - WS_EVT_NAME
 - WS_DATA_NAME
diff --git a/packages/constants/constants.json b/packages/constants/constants.json
index af74d2e49e0347dff68e41a446276a7066bdd5f8..8dbe86cf8787fd147c07a7014be5b9ad8db7308d 100644
--- a/packages/constants/constants.json
+++ b/packages/constants/constants.json
@@ -120,6 +120,11 @@
   "LOGIN_EVENT_NAME": "__login__",
   "LOGOUT_EVENT_NAME": "__logout__",
   "DISCONNECT_EVENT_NAME": "__disconnect__",
+  "INTER_COM_EVENT_NAME": "__inter_com__",
+  "INTER_COM_EVENT_NAMES": [
+    "__switch__",
+    "__disconnect__"
+  ],
   "WS_REPLY_TYPE": "__reply__",
   "WS_EVT_NAME": "__event__",
   "WS_DATA_NAME": "__data__",
diff --git a/packages/constants/main.js b/packages/constants/main.js
index e40da32bf3ccf929da062203bbe766db8b4b77d7..f9dfa41c834ffa8bc49ac4ca9975d75a0ac9b4a4 100644
--- a/packages/constants/main.js
+++ b/packages/constants/main.js
@@ -120,6 +120,11 @@ module.exports = {
     "LOGIN_EVENT_NAME": "__login__",
     "LOGOUT_EVENT_NAME": "__logout__",
     "DISCONNECT_EVENT_NAME": "__disconnect__",
+    "INTER_COM_EVENT_NAME": "__inter_com__",
+    "INTER_COM_EVENT_NAMES": [
+        "__switch__",
+        "__disconnect__"
+    ],
     "WS_REPLY_TYPE": "__reply__",
     "WS_EVT_NAME": "__event__",
     "WS_DATA_NAME": "__data__",
diff --git a/packages/constants/module.js b/packages/constants/module.js
index 8a4e7699bb1a559ce591087602f45380a0d878ed..fec52a9d401d660020fd5720f947cc0ecb286124 100644
--- a/packages/constants/module.js
+++ b/packages/constants/module.js
@@ -130,6 +130,13 @@ export const LOGOUT_EVENT_NAME = '__logout__'
 // although it should never happens, but in some edge case might want to 
 // disconnect from the current server, then re-establish connection later
 export const DISCONNECT_EVENT_NAME = '__disconnect__'
+// group the inter communcation event name in one then for the server 
+// to create a handler to handle this kind of event
+export const INTER_COM_EVENT_NAME = '__inter_com__'
+export const INTER_COM_EVENT_NAMES = [
+  SWITCH_USER_EVENT_NAME, 
+  DISCONNECT_EVENT_NAME
+] 
 // for ws servers
 export const WS_REPLY_TYPE = '__reply__'
 export const WS_EVT_NAME = '__event__'
diff --git a/packages/constants/package.json b/packages/constants/package.json
index 4e0f0a758bbf80e4e2e2136c455eb131030a44e6..455b05e2723f932a0c501ba5ec58083e86f1e75e 100755
--- a/packages/constants/package.json
+++ b/packages/constants/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jsonql-constants",
-  "version": "1.9.3",
+  "version": "1.9.4",
   "description": "All the share constants for json:ql tools",
   "main": "main.js",
   "module": "module.js",
diff --git a/packages/ws-client-core/package.json b/packages/ws-client-core/package.json
index 08b7a98c643c6317b801dfb6d09e42ab62739226..473230977f3701854d25468127e3f311589f3dc2 100644
--- a/packages/ws-client-core/package.json
+++ b/packages/ws-client-core/package.json
@@ -53,7 +53,7 @@
     "node": ">=8"
   },
   "dependencies": {
-    "jsonql-constants": "^1.9.2",
+    "jsonql-constants": "^1.9.3",
     "jsonql-errors": "^1.1.10",
     "jsonql-params-validator": "^1.5.2",
     "jsonql-utils": "^1.0.0",