diff --git a/library/GSM_RR_Types.ttcn b/library/GSM_RR_Types.ttcn
index eed58df..2625a1f 100644
--- a/library/GSM_RR_Types.ttcn
+++ b/library/GSM_RR_Types.ttcn
@@ -139,6 +139,12 @@
 		RrMessageType	message_type
 	} with { variant "" };
 
+	template RrL3Header t_RrL3Header(RrMessageType msg_type) := {
+		skip_indicator := 0,
+		rr_protocol_discriminator := 6,
+		message_type := msg_type
+	}
+
 	type record MaioHsn {
 	} with { variant "" };
 
@@ -486,6 +492,31 @@
 		variant (hh) "PRESENCE(presence = '11'B)"
 	};
 
+	type record MeasurementResults {
+		BIT1		ba_used,
+		BIT1		dtx_used,
+		uint6_t		rxlev_full_srv_cell,
+		BIT1		threeg_ba_used,
+		BIT1		meas_valid,
+		uint6_t		rxlev_sub_srv_cell,
+		BIT1		si23_ba_used,
+		uint3_t		rxqual_full_srv_cell,
+		uint3_t		rxqual_sub_srv_cell,
+		uint3_t		no_ncell_m,
+		NcellReports	ncell_reports optional
+	} with { variant (no_ncell_m) "LENGTHTO(ncell_reports)"
+		 variant (no_ncell_m) "UNIT(elements)"
+		 variant "PADDING(yes)"
+		 variant "FIELDLENGTH(16)"
+	};
+
+	type record NcellReport {
+		uint6_t		rxlev,
+		uint5_t		bcch_freq,
+		uint6_t		bsic
+	} with { variant ""};
+	type record of NcellReport NcellReports;
+
 
 	/* 9.1.18 */
 	type record ImmediateAssignment {
@@ -497,7 +528,7 @@
 		TimingAdvance			timing_advance,
 		MobileAllocation		mobile_allocation,
 		/* TODO: starting time TLV */
-		IaRestOctets			rest_octets
+		IaRestOctets			rest_octets optional
 	} with { variant (chan_desc) "PRESENCE(ded_or_tbf.tbf = false)"
 		 variant (pkt_chan_desc) "PRESENCE(ded_or_tbf.tbf = true)" };
 
@@ -513,6 +544,11 @@
 		ReqRefWaitInd4			payload
 	} with { variant "" };
 
+	/* 9.1.21 */
+	type record MeasurementReport {
+		MeasurementResults		meas_res
+	} with { variant "" };
+
 	/* 9.1.22 */
 	type record PagingRequestType1 {
 		ChannelNeeded12			chan_needed,
@@ -607,6 +643,7 @@
 
 	type union RrL3Union {
 		PagingResponse	paging_response,
+		MeasurementReport meas_rep,
 		octetstring	other
 	};
 
@@ -615,8 +652,61 @@
 		RrL3Union	payload
 	} with { variant (payload) "CROSSTAG(
 				paging_response, header.message_type = PAGING_RESPONSE;
-
+				meas_rep, header.message_type = MEASUREMENT_REPORT;
 				other, OTHERWISE;
 		)" }
 
+	external function enc_GsmRrL3Message(in GsmRrL3Message msg) return octetstring
+		with { extension "prototype(convert) encode(RAW)" };
+	external function dec_GsmRrL3Message(in octetstring stream) return GsmRrL3Message
+		with { extension "prototype(convert) decode(RAW)" };
+
+
+	template GsmRrMessage ts_IMM_ASS(uint8_t ra, GsmFrameNumber fn, TimingAdvance ta,
+						ChannelDescription ch_desc, MobileAllocation ma) := {
+		header := t_RrHeader(IMMEDIATE_ASSIGNMENT, 0),
+		payload := {
+			imm_ass := {
+				ded_or_tbf := {
+					spare := '0'B,
+					tma := false,
+					downlink := false,
+					tbf := false
+				},
+				page_mode := PAGE_MODE_NORMAL,
+				chan_desc := ch_desc,
+				pkt_chan_desc := omit,
+				req_ref := f_compute_ReqRef(ra, fn),
+				timing_advance := ta,
+				mobile_allocation := ma,
+				rest_octets := omit
+			}
+		}
+	};
+
+	template (value) GsmRrL3Message ts_MEAS_REP(boolean valid, uint6_t rxl_f, uint6_t rxl_s,
+						  uint3_t rxq_f, uint3_t rxq_s,
+						  template (omit) NcellReports reps) := {
+		header := t_RrL3Header(MEASUREMENT_REPORT),
+		payload := {
+			meas_rep := {
+				meas_res := {
+					ba_used := '0'B,
+					dtx_used := '0'B,
+					rxlev_full_srv_cell := rxl_f,
+					threeg_ba_used := '0'B,
+					meas_valid := bool2bit(valid),
+					rxlev_sub_srv_cell := rxl_s,
+					si23_ba_used := '0'B,
+					rxqual_full_srv_cell := rxq_f,
+					rxqual_sub_srv_cell := rxq_s,
+					no_ncell_m := 0,
+					ncell_reports := reps
+				}
+			}
+		}
+	};
+
+
+
 } with { encode "RAW" ; variant "FIELDORDER(msb)" }