diff --git a/datalink814_ge/src/linklayer/node_list.c b/datalink814_ge/src/linklayer/node_list.c
index f0f9151..6c5f2c5 100644
--- a/datalink814_ge/src/linklayer/node_list.c
+++ b/datalink814_ge/src/linklayer/node_list.c
@@ -45,11 +45,23 @@ static void entry_free(void* val){
 /**
  * @brief	helper function to match node entries by nodeIds
  */
-static bool entry_match(void* a, void* b){
+static int8_t entry_compare(void* a, void* b){
 	ASSERT(a != NULL);
 	ASSERT(b != NULL);
-	return (((NODE_ENTRY*)a)->nodeInfo.nodeId 
-			== ((NODE_ENTRY*)b)->nodeInfo.nodeId);
+	register uint8_t idA, idB;
+	idA = ((NODE_ENTRY*)a)->nodeInfo.nodeId;
+	idB = ((NODE_ENTRY*)b)->nodeInfo.nodeId;
+	if (idA == idB)
+	{
+		return 0;
+	}
+	else if(idA < idB) {
+		return -1;
+	}
+	else {
+		return 1;
+	}
+	
 }
 /*****************************************************************************/
 /**
@@ -67,7 +79,7 @@ int32_t L2_NodeList_Init(NODE_LIST **list) {
 		return ENOMEM;
 	}
 	(*list)->free = entry_free;
-	(*list)->match = entry_match;
+	(*list)->compare = entry_compare;
 	return SUCCESS;
 }
 
@@ -98,7 +110,7 @@ void L2_NodeList_Destroy(NODE_LIST *list){
 }
 /*****************************************************************************/
 /**
- * @brief   Get node entry frome node list base on node id.
+ * @brief   Get node entry from node list base on node id.
  *
  * @param   list
  * @param   nodeId
@@ -334,7 +346,7 @@ int32_t L2_GetNodeSpeed(NODE_LIST *list, uint8_t nodeId, COORD *speed) {
  *
  * @param   list
  * @param   nodeId
- * @param   defl
+ * @param   devi
  *
  * @return  SUCCESS update successfully.
  *          FAILURE Node not exist.
diff --git a/datalink814_ge/src/linklayer/schdevent.c b/datalink814_ge/src/linklayer/schdevent.c
index 1fe68af..d114907 100644
--- a/datalink814_ge/src/linklayer/schdevent.c
+++ b/datalink814_ge/src/linklayer/schdevent.c
@@ -40,11 +40,21 @@ static void schdevent_free(void* val){
 /**
  * @brief   helper function to match events by ids.
  */
-static bool schdevent_match(void* a, void* b){
+static int8_t schdevent_compare(void* a, void* b){
 	ASSERT(a == NULL);
 	ASSERT(b != NULL);
-	return (((L2_SCHD_EVENT*)a)->eventId 
-			== ((L2_SCHD_EVENT*)b)->eventId);
+	register uint32_t idA, idB;
+	idA = ((L2_SCHD_EVENT*)a)->eventId;
+	idB = ((L2_SCHD_EVENT*)b)->eventId;
+	if( idA== idB) {
+		return 0;
+	}
+	else if (idA < idB) {
+		return -1;
+	}
+	else {
+		return 1;
+	}
 }
 
 /*****************************************************************************/
@@ -69,7 +79,7 @@ int32_t L2_CreateSchedEventPool(L2_SCHD_POOL** schdPool) {
 		return EALLOC;
 	}
 	(*schdPool)->schdList->free = schdevent_free;
-	(*schdPool)->schdList->match = schdevent_match;
+	(*schdPool)->schdList->compare = schdevent_compare;
 	(*schdPool)->envCnt = 0;
 	return SUCCESS;
 }