diff --git a/src/vcm.c b/src/vcm.c
index 1921c97..3301140 100644
--- a/src/vcm.c
+++ b/src/vcm.c
@@ -1,6 +1,7 @@
 #include "vcm.h"
 #include "facilities.h"
 
+#include <it2s-gnss.h>
 #include <it2s-tender/epv.h>
 #include <it2s-tender/space.h>
 #include <it2s-tender/geodesy.h>
@@ -8,7 +9,6 @@
 #include <it2s-tender/packet.h>
 #include <it2s-asn/etsi-its-sdu/itss-networking/EIS_NetworkingRequest.h>
 #include <it2s-asn/etsi-its-sdu/itss-facilities/EIS_FacilitiesIndication.h>
-#include <it2s-asn/etsi-its-sdu/itss-management/EIS_ManagementRequest.h>
 #include <it2s-asn/etsi-its-v1/vcm/EI1_VCM.h>
 
 #include <tgmath.h>
@@ -479,24 +479,12 @@ static int vcm_check_handle_request(EI1_VCM_t* vcm, mc_neighbour_s* neighbour) {
             );
     free(trj);
 
-    EIS_ManagementRequest_t* mreq = calloc(1, sizeof(EIS_ManagementRequest_t));
-    mreq->present = EIS_ManagementRequest_PR_attributes;
-    mreq->choice.attributes.present = EIS_ManagementRequestAttributes_PR_set;
-    mreq->choice.attributes.choice.set.speed = calloc(1, sizeof(EIS_ManagementSpeedSet_t));
-    EIS_ManagementSpeedSet_t* mgss = mreq->choice.attributes.choice.set.speed;
-    mgss->rate = 5; /* km/h/s */
-    mgss->temporary = true; /* go back to original speed after a while */
-    mgss->type.present = EIS_ManagementSpeedSetType_PR_diff; /* differential change set */
-    mgss->type.choice.diff = (dreq > dego) ? 10 : -10; /* % */
-    asn_enc_rval_t enc = asn_encode_to_buffer(NULL, ATS_CANONICAL_OER, &asn_DEF_EIS_ManagementRequest, mreq, buf1, buf_len);
-    if (enc.encoded == -1) {
-        log_error("[vc] failed to encode MReq.speedSet (%s)", enc.failed_type->name);
-    }
-    itss_0send(coordination->mgmt_socket, buf1, enc.encoded);
-    if (itss_0recv_rt(&coordination->mgmt_socket, buf2, buf_len, buf1, enc.encoded, 500) == -1) {
-        log_error("[vc]-> MReq.speedSet ->[management] <TIMEOUT>");
-    }
-    ASN_STRUCT_FREE(asn_DEF_EIS_ManagementRequest, mreq);
+    itss_space_lock();
+    it2s_gnss_reqset_t reqset = {0};
+    reqset.speed.value = epv.space.data.speed.value + (dreq > dego ? 360 : -360) ; /* +- 10 km/h */
+    reqset.speed.present = 1;
+    itss_space_set(&reqset);
+    itss_space_unlock();
 
     // Respond
     EI1_VCM_t* vcm_rep = NULL;