diff --git a/test/case46/src/testcase46.c b/test/case46/src/testcase46.c
index f15c33c..a7a0572 100644
--- a/test/case46/src/testcase46.c
+++ b/test/case46/src/testcase46.c
@@ -189,6 +189,7 @@ void *handleUdpTransmission(void *arg)
     // while 
     uint8_t block_n = 0;
     uint8_t cut_i = 0;
+    printf("[udp.sendto] send to 172.29.118.76:28864 ...\n");
     while (1)
     {   
         if (1 == slot_ind_flag)
@@ -202,14 +203,14 @@ void *handleUdpTransmission(void *arg)
             );
             block_n = 0;
             if (w_idx == r_idx){
-                printf("[while(p)]: w_idx = %hhu, r_idx = %hhu\n", w_idx, r_idx);
-                printf("[while(p)]: pass\n"); 
+                // printf("[while(p)]: w_idx = %hhu, r_idx = %hhu\n", w_idx, r_idx);
+                // printf("[while(p)]: pass\n"); 
             } 
             else 
             {
                 if (r_idx < w_idx) {
-                    printf("[while(r)]: w_idx = %hhu, r_idx = %hhu\n", w_idx, r_idx);
-                    printf("[while(r)]: r_idx < w_idx\n");
+                    // printf("[while(r)]: w_idx = %hhu, r_idx = %hhu\n", w_idx, r_idx);
+                    // printf("[while(r)]: r_idx < w_idx\n");
                     block_n = w_idx - r_idx;
                     for (cut_i = 0; cut_i < block_n; cut_i++)
                     {
@@ -234,8 +235,8 @@ void *handleUdpTransmission(void *arg)
                 } 
                 else //r_idx > w_idx
                 { 
-                    printf("[while(w)]: w_idx = %hhu, r_idx = %hhu\n", w_idx, r_idx);
-                    printf("[while(w)]: w_idx < r_idx\n"); 
+                    // printf("[while(w)]: w_idx = %hhu, r_idx = %hhu\n", w_idx, r_idx);
+                    // printf("[while(w)]: w_idx < r_idx\n"); 
                     for (cut_i = 0; cut_i < (8-r_idx); cut_i++)
                     {
                         memcpy(udp_data_buffer,