The LTE RACH Analysis will show differently as RACH only or RACH with VoLTE.

RACH analysis only

RRC State: “Idle” or “Connected”, “Camped”, “Suspended”, “Connecting”, “IRAT To LTE Started”, “Closing”

Reason: Reason for RACH signaling. This is indicated for each RACH attempt. One of: {Connection Request, Radio Link Failure, UL

Data Arrival, DL Data Arrival, Handover}.

Tx Power Ord/Cur.: transmit power of first RACH preamble (dBm).Current means Transmit power of current RACH preamble (dBm).

Max Preambles: Maximum number of preambles in one preamble ramping cycle. Taken from LTE Layer 3 message System Information Block 2.

Preamble Step: Power ramping step size, power increase between consecutive preambles (dB). Taken from LTE Layer 3 message system Information Block 2.

Retry Counter: retried counters of RACH attempts

Type: RACH procedure type: “Contention Free” or “Contention Based”.

Result: RACH procedure result. One of: {Success, Failure at MSG2, Failure at MSG4 due to CT timer expired, Failure at MSG4 due to CT resolution not passed, Aborted}

Resolution Timer: MAC contention resolution timer expressed as a number of subframes. Taken from LTE Layer 3 message System Information Block 2.

When VOLTE call is made, the fragment shown like the second picture

Call Type: Voice or Video

AMR RATE DL/UL: AMR Rate of downlink and uplink

Codec DL/UL: differently used AMR codec, WB or NB

SSRC DL/UL: Source of the destined IMS sources for downlink and uplink.

Payload Size: the average Payload size of total transmitted IMS packets.

RTP Jitter: Inter-Packet Delay Variation. The difference between the one-way-delay of two packets, calculated according to RFC 3393.

IPDV: The variance in the inter-arrival time of the RTP packets calculated according to RFC 3550 (Section 6.4.1)

Packet Loss: percent of RTP packets are lost, calculated by looking for discontinuity in the RTP Sequence Number