diff --git a/TSCP/src/MSCP/Arb/Arb.c b/TSCP/src/MSCP/Arb/Arb.c
index 2baeea3..a68311a 100644
--- a/TSCP/src/MSCP/Arb/Arb.c
+++ b/TSCP/src/MSCP/Arb/Arb.c
@@ -43,7 +43,7 @@ static void s_Area_State_Req_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK
  * @brief 处理校验通过的状态ACK帧
  */
 static void s_Area_State_Ack_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK_T* state_pack,
-    IN CM_UINT32 local_sn, IN CM_UINT8 time_sync_flag);
+    IN CM_UINT32 local_sn);
 /**
  * @brief 仲裁处理
  */
@@ -279,7 +279,6 @@ static void s_Area_State_Multi_Process(void)
     else
     {
         /**非主地主接收组播状态数据 */
-        CM_Sleep(10u); /**等待10ms后接收组播数据 */
         s_Area_State_Multi_Recv_Process();
     }
 
@@ -428,8 +427,9 @@ static void s_Area_State_Ack_Process(void)
     CM_UINT8 timeSyncFlag = AREA_FLAGS_CTRL_PTR->Time_Sync_Flag;
     CM_BOOL ack_flags[5] = {CM_FALSE, CM_FALSE, CM_FALSE, CM_FALSE, CM_FALSE};
 
+    CM_UINT32 i = 0u;
     /**持续30ms */
-    do
+    for(i = 0u;i<10;i++)
     {
         /**REQ与ACK共用一个FIFO，每条报文只读取一次并按类型分发。 */
         do
@@ -446,9 +446,7 @@ static void s_Area_State_Ack_Process(void)
 
                 if((crc1 == state_pack.CRC1) && (crc2 == state_pack.CRC2) &&
                     ((AREA_ARB_STATE_PACK_LEN - 1u) == state_pack.Len) &&
-                    (state_pack.DstID == AREA_BASIC_CFG_PTR->BoardID) &&
-                    (srcID >= MSCP_AREA_A_BOARD_ID_A) &&
-                    (srcID <= MSCP_AREA_B_BOARD_ID_B))
+                    (state_pack.DstID == AREA_BASIC_CFG_PTR->BoardID))
                 {
                     if(ENUM_AREA_MSG_STATE_REQ == state_pack.MsgType)
                     {
@@ -456,7 +454,7 @@ static void s_Area_State_Ack_Process(void)
                     }
                     else if(ENUM_AREA_MSG_STATE_ACK == state_pack.MsgType)
                     {
-                        s_Area_State_Ack_Recv_Process(&state_pack, localsn, timeSyncFlag);
+                        s_Area_State_Ack_Recv_Process(&state_pack, localsn);
                     }
                     else
                     {
@@ -468,17 +466,12 @@ static void s_Area_State_Ack_Process(void)
 
         /**同步接收状态和本周期ACK目标，再统一回复。 */
         s_Area_2oo2Sync_AfterStateRecv(ack_flags);
-        if((partner_id <= MSCP_AREA_B_BOARD_ID_B) &&
-            (area_a_id <= MSCP_AREA_B_BOARD_ID_B) &&
-            (area_b_id <= MSCP_AREA_B_BOARD_ID_B))
-        {
-            s_Area_SendACK_After2oo2(ack_flags[partner_id], ack_flags[area_a_id], ack_flags[area_b_id]);
-        }
+        s_Area_SendACK_After2oo2(ack_flags[partner_id], ack_flags[area_a_id], ack_flags[area_b_id]);
         CM_Memset(ack_flags, 0, sizeof(ack_flags), sizeof(ack_flags));
 
         CM_Sleep(2u);
         used_time = (CM_UINT32)(CM_GetTick() / CM_UNSIGNED_MILLION) - start_tick;
-    } while(used_time < 30u);
+    }
 }
 
 static void s_Area_State_Req_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK_T* state_pack,
@@ -492,7 +485,7 @@ static void s_Area_State_Req_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK
     }
 
     s_Area_GetCommStatus_byID(state_pack->SrcID, &last_sn, NULL);
-    if(state_pack->SN > last_sn)
+    if(state_pack->SN >= last_sn)
     {
         ack_flags[state_pack->SrcID] = CM_TRUE;
         s_Area_SetCommStatus_byID(state_pack->SrcID, state_pack->SN, CM_TRUE);
@@ -504,7 +497,7 @@ static void s_Area_State_Req_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK
 }
 
 static void s_Area_State_Ack_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK_T* state_pack,
-    IN CM_UINT32 local_sn, IN CM_UINT8 time_sync_flag)
+    IN CM_UINT32 local_sn)
 {
     CM_UINT32 sn_diff = 0u;
 
@@ -513,6 +506,8 @@ static void s_Area_State_Ack_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK
         return;
     }
 
+    CM_UINT8 time_sync_flag = state_pack->TimeSyncFlag;
+
     sn_diff = (local_sn >= state_pack->SN) ?
         (local_sn - state_pack->SN) : (state_pack->SN - local_sn);
     if(((1u == time_sync_flag) && (state_pack->SN == local_sn)) ||
@@ -524,6 +519,11 @@ static void s_Area_State_Ack_Recv_Process(IN const STRU_AREA_WITH_ARB_STATE_PACK
         AREA_LOG_MSG("AREA_ARB:State ACK received, SrcID:%d SN:%u State:%d 2x2:%d\n",
             state_pack->SrcID, state_pack->SN, state_pack->StateArea, state_pack->State2x);
     }
+    else
+    {
+        AREA_LOG_MSG("AREA_ARB:State ACK recv failed, SrcID:%d SN:%u State:%d 2x2:%d\n",
+            state_pack->SrcID, state_pack->SN, state_pack->StateArea, state_pack->State2x);        
+    }
 }
 
 /**
@@ -565,17 +565,18 @@ static void s_Area_Arb_Send_Process(void)
     CM_UINT8 id_sm = AreaArb_GetID_byState(ENUM_AREA_SLAVE, ENUM_2x2_MASTER); /**备地主的板卡ID */
     CM_UINT8 id_mm = AreaArb_GetID_byState(ENUM_AREA_MASTER, ENUM_2x2_MASTER); /**主地主的板卡ID */
     /**获取通信中断标志 */
-    CM_UINT8 flag_comm_all_down = AREA_COMM_STATUS_PTR->Patner_RcvFlag | AREA_COMM_STATUS_PTR->Area_A_RcvFlag | AREA_COMM_STATUS_PTR->Area_B_RcvFlag;
+    CM_BOOL flag_comm_all_down = AREA_COMM_STATUS_PTR->Area_A_RcvFlag | AREA_COMM_STATUS_PTR->Area_B_RcvFlag;  /**用于判断通信是否完全中断 */
+    CM_BOOL flag_comm_all_up   = AREA_COMM_STATUS_PTR->Area_A_RcvFlag & AREA_COMM_STATUS_PTR->Area_B_RcvFlag;  /**用于判断通信是否完全正常 */
     /**重置仲裁请求发送标志 */
-     AREA_ARB_CTRL_PTR->Arb_Send_Flag = 0u;
+    AREA_ARB_CTRL_PTR->Arb_Send_Flag = 0u;
 
     /**判断是否发送仲裁请求 */
     if(ENUM_2x2_MASTER == AREA_STATE_CTRL_PTR->State2x.LocalState)
     {
         /**主系判断是否发送仲裁请求 */
-        if(ENUM_AREA_MASTER == local_area_state && 0u == id_sm)
+        if(ENUM_AREA_MASTER == local_area_state && 0u == id_sm && CM_FALSE == flag_comm_all_up)
         {
-            /**本地主地主，与备地主通信中断，发送仲裁请求 */
+            /**本地主地主，与备地通信存在异常，发送仲裁请求 */
             AREA_ARB_CTRL_PTR->Arb_Send_Flag = 1u;
             send_rt = Area_Arb_Req_Send(tmp_buf, tmp_len);
             AREA_LOG_MSG("AREA_ARB:Request arbitration, master lost slave, BoardID:%d SN:%u Result:0x%x\n",
@@ -599,7 +600,7 @@ static void s_Area_Arb_Send_Process(void)
         }
         else if(ENUM_AREA_UNKNOW == local_area_state && CM_FALSE == flag_comm_all_down)
         {
-            /**未知地主系，与其他三系通信持续中断10周期，发送仲裁请求 */
+            /**未知地主系，与另一地通信持续中断10周期，发送仲裁请求 */
             if(tolerate_arb >= 10u)
             {
                 AREA_ARB_CTRL_PTR->Arb_Send_Flag = 1u;
@@ -745,32 +746,45 @@ static void s_Area_State_Multi_Recv_Process(void)
     CM_INT32 rcv_len = 0;
     STRU_AREA_WITH_ARB_STATE_MULTI_PACK_T multi_pack = {0}; /**状态组播帧数据结构体 */
     CM_UINT32 tickNow = (CM_UINT32)(CM_GetTick() / CM_UNSIGNED_MILLION);
+    CM_UINT32 tickStart = tickNow, usedTime = 0u;
     CM_UINT32 tickRcv = 0u;
     /*组播接收*/
-    rcv_len = Area_State_Multi_Recv(wire_buf, sizeof(wire_buf), &tickRcv);
 
     /*双CRC校验*/
-    if(AREA_ARB_STATE_MULTI_PACK_LEN == rcv_len &&
-        ((tickNow - tickRcv) < g_PFM_Cfg.CYC_TIME))
+    do
     {
-        Area_Arb_State_Multi_UnPack(&multi_pack, wire_buf, (CM_UINT32)rcv_len);
-        crc1 = CM_Crc32_1(&wire_buf[1], (CM_UINT32)rcv_len - 9u);
-        crc2 = CM_Crc32_2(&wire_buf[1], (CM_UINT32)rcv_len - 9u);
-        if(crc1 == multi_pack.CRC1 && crc2 == multi_pack.CRC2 &&
-            ((AREA_ARB_STATE_MULTI_PACK_LEN - 1u) == multi_pack.Len) &&
-            ENUM_AREA_MSG_STATE_MULTI == multi_pack.MsgType)
+        rcv_len = Area_State_Multi_Recv(wire_buf, sizeof(wire_buf), &tickRcv);
+        tickNow = (CM_UINT32)(CM_GetTick() / CM_UNSIGNED_MILLION);
+        if(AREA_ARB_STATE_MULTI_PACK_LEN == rcv_len &&
+            ((tickNow - tickRcv) < g_PFM_Cfg.CYC_TIME))
         {
-            s_Area_SetCommStatus_byID(multi_pack.SrcID, multi_pack.SN, CM_TRUE);
-            AreaArb_SetState_byID(multi_pack.SrcID, multi_pack.StateArea);
-            AreaArb_Set2xState_byID(multi_pack.SrcID, multi_pack.State2x);
-            AREA_LOG_MSG("AREA_ARB:Multicast state received, SrcID:%d SN:%u State:%d 2x2:%d\n",
-                multi_pack.SrcID, multi_pack.SN, multi_pack.StateArea, multi_pack.State2x);
+            Area_Arb_State_Multi_UnPack(&multi_pack, wire_buf, (CM_UINT32)rcv_len);
+            crc1 = CM_Crc32_1(&wire_buf[1], (CM_UINT32)rcv_len - 9u);
+            crc2 = CM_Crc32_2(&wire_buf[1], (CM_UINT32)rcv_len - 9u);
+            if(crc1 == multi_pack.CRC1 && crc2 == multi_pack.CRC2 &&
+                ((AREA_ARB_STATE_MULTI_PACK_LEN - 1u) == multi_pack.Len) &&
+                ENUM_AREA_MSG_STATE_MULTI == multi_pack.MsgType)
+            {
+                s_Area_SetCommStatus_byID(multi_pack.SrcID, multi_pack.SN, CM_TRUE);
+                AreaArb_SetState_byID(multi_pack.SrcID, multi_pack.StateArea);
+                AreaArb_Set2xState_byID(multi_pack.SrcID, multi_pack.State2x);
+                AREA_LOG_MSG("AREA_ARB:Multicast state received, SrcID:%d SN:%u State:%d 2x2:%d\n",
+                    multi_pack.SrcID, multi_pack.SN, multi_pack.StateArea, multi_pack.State2x);
+            }
+            else
+            {
+                AREA_LOG_MSG("Multi Recv Crc Fail %08x-%08x, %08x-%08x\n",crc1, multi_pack.CRC1, crc2, multi_pack.CRC2);
+            }
         }
         else
         {
-            AREA_LOG_MSG("Multi Recv Crc Fail %08x-%08x, %08x-%08x\n",crc1, multi_pack.CRC1, crc2, multi_pack.CRC2);
-        }
-    }
+            AREA_LOG_MSG("AREA_ARB:Multicast state received, tickNow - tickRcv = %llums\n", tickNow - tickRcv);        
+        }     
+        usedTime = tickNow - tickStart;   
+        CM_Sleep(1u);
+    } while (usedTime < 10u);
+    
+
 
 }
 /**
diff --git a/TSCP/src/MSCP/Arb/Arb_Net.c b/TSCP/src/MSCP/Arb/Arb_Net.c
index afd1dcb..89bc2f1 100644
--- a/TSCP/src/MSCP/Arb/Arb_Net.c
+++ b/TSCP/src/MSCP/Arb/Arb_Net.c
@@ -273,7 +273,7 @@ ENUM_CM_RETURN Area_State_Multi_Send(IN const CM_UINT8* pBuf, IN CM_INT32 BufLen
     if(NULL != pBuf)
     {
 		/*- 组播发送 */
-    	rt = CM_UDP_Send_Msg(AREA_MULTI_COMM_CFG_PTR->Socket_Send, pBuf, BufLen, inet_addr(AREA_MULTI_COMM_CFG_PTR->IP_Multicast),AREA_MULTI_COMM_CFG_PTR->Port_Send);
+    	rt = CM_UDP_Send_Msg(AREA_MULTI_COMM_CFG_PTR->Socket_Send, pBuf, BufLen, inet_addr(AREA_MULTI_COMM_CFG_PTR->IP_Multicast),AREA_MULTI_COMM_CFG_PTR->Port_Recv);
     }
     else
     {