Index: lams_central/src/java/org/lamsfoundation/lams/web/qb/QbCollectionController.java
===================================================================
diff -u -rba4cb0681d080596444ca44c644a8ea0fdd8e743 -rfe0a5324254ef622171304b5a01341d99e7b991a
--- lams_central/src/java/org/lamsfoundation/lams/web/qb/QbCollectionController.java	(.../QbCollectionController.java)	(revision ba4cb0681d080596444ca44c644a8ea0fdd8e743)
+++ lams_central/src/java/org/lamsfoundation/lams/web/qb/QbCollectionController.java	(.../QbCollectionController.java)	(revision fe0a5324254ef622171304b5a01341d99e7b991a)
@@ -178,6 +178,20 @@
 	qbService.addCollection(getUserId(), name);
     }
 
+    @RequestMapping("/changeCollectionName")
+    @ResponseBody
+    public String changeCollectionName(@RequestParam long collectionUid, @RequestParam String name) {
+	Collection<QbCollection> collections = qbService.getUserCollections(getUserId());
+	name = name.trim();
+	for (QbCollection collection : collections) {
+	    if (!collection.getUid().equals(collectionUid) && name.equalsIgnoreCase(collection.getName())) {
+		return "false";
+	    }
+	}
+	qbService.changeCollectionName(collectionUid, name);
+	return "true";
+    }
+
     @RequestMapping("/removeCollection")
     @ResponseBody
     public void removeCollection(@RequestParam long collectionUid) {
Index: lams_common/src/java/org/lamsfoundation/lams/qb/service/IQbService.java
===================================================================
diff -u -rba4cb0681d080596444ca44c644a8ea0fdd8e743 -rfe0a5324254ef622171304b5a01341d99e7b991a
--- lams_common/src/java/org/lamsfoundation/lams/qb/service/IQbService.java	(.../IQbService.java)	(revision ba4cb0681d080596444ca44c644a8ea0fdd8e743)
+++ lams_common/src/java/org/lamsfoundation/lams/qb/service/IQbService.java	(.../IQbService.java)	(revision fe0a5324254ef622171304b5a01341d99e7b991a)
@@ -96,4 +96,6 @@
     QbCollection getCollection(long collectionUid);
 
     int getCountQuestionActivities(long qbQuestionUid);
+
+    void changeCollectionName(long collectionUid, String name);
 }
\ No newline at end of file
Index: lams_common/src/java/org/lamsfoundation/lams/qb/service/QbService.java
===================================================================
diff -u -rba4cb0681d080596444ca44c644a8ea0fdd8e743 -rfe0a5324254ef622171304b5a01341d99e7b991a
--- lams_common/src/java/org/lamsfoundation/lams/qb/service/QbService.java	(.../QbService.java)	(revision ba4cb0681d080596444ca44c644a8ea0fdd8e743)
+++ lams_common/src/java/org/lamsfoundation/lams/qb/service/QbService.java	(.../QbService.java)	(revision fe0a5324254ef622171304b5a01341d99e7b991a)
@@ -457,10 +457,18 @@
 	return qbDAO.find(QbCollection.class, collectionUid);
     }
 
+    @Override
     public int getCountQuestionActivities(long qbQuestionUid) {
 	return qbDAO.getCountQuestionActivities(qbQuestionUid);
     }
 
+    @Override
+    public void changeCollectionName(long collectionUid, String name) {
+	QbCollection collection = getCollection(collectionUid);
+	collection.setName(name);
+	qbDAO.update(collection);
+    }
+
     public void setQbDAO(IQbDAO qbDAO) {
 	this.qbDAO = qbDAO;
     }