2.6 ‘Session Statistics’ Worksheet

2 Description of ‘VoLTE Report’ Template > 2.6 ‘Session Statistics’ Worksheet

2.6.1 Session Attempts

• Bar chart showing session attempts per hour.

A session attempt is triggered on SIP Request INVITE (SIP INVITE). Note that a retry (resend) of INVITE will not trigger a new Session Attempt event.

2.6.2 Session Setup Success Ratio

For the KPI definition, see section 2.5.1.

• Statistics tabulated as follows:

	All	MO	MT
Success	53	21	32
Failure	4	2	2
Success Rate (%)	93.0%	91.3%	94.1%

Percentages also displayed in bar chart.

2.6.3 Session Setup Delay

For the KPI definition, see section 2.5.1.

• Statistics tabulated as follows (‘All’ = MO + MT):

	Mean	Max	Min	Std Dev	Samples	% > 5 s
All	1.68	16.636	0.118	2.94	57	3.51
Mobile Originated (MO)	3.75	16.636	1.19	3.78	23	8.7
Mobile Terminated (MT)	0.28	0.748	0.118	0.1	34	0

• These statistics are also displayed in a bar chart with grouping into bins according to this legend:

	All	MO	MT
Range	PDF %	PDF %	PDF %
< 1	59.7	0.0	100.0
1 to 2	7.0	17.4	0.0
2 to 4	29.8	73.9	0.0
4 to 6	0.0	0.0	0.0
6 to 10	0.0	0.0	0.0
> 10	3.5	8.7	0.0

• Additional table with MO and MT each broken down by initial RRC state:

	RRC State	Mean	Max	Min	Std Dev	Samples	% > 5 s
MO	Idle	3.97	16.636	1.659	3.88	21	9.52
MO	Connected	1.41	1.625	1.19	0.22	2	0
MT	Idle	0.28	0.748	0.118	0.11	29	0
MT	Connected	0.29	0.315	0.265	0.02	5	0

2.6.4 Session Setup Failure Cause

• Pie chart detailing failure causes as percentages of the total.

2.6.5 Conversation Start Delay

For the KPI definition, see section 2.5.1.

• Bar chart with grouping into bins according to this legend:

	All	MO	MT
Range	PDF %	PDF %	PDF %
< 100	30.2	69.6	0.0
100. 200	5.7	13.0	0.0
200. 300	3.8	8.7	0.0
300. 500	3.8	8.7	0.0
500. 1000	17.0	0.0	30.0
1000. 2000	39.6	0.0	70.0
> 2000	0.0	0.0	0.0

2.6.6 Session Completion Success Ratio

For the KPI definition, see section 2.5.1.

• Statistics tabulated as follows:

	All	MO	MT
Success	40	20	20
Failure	12	1	11
Success Rate (%)	76.9%	95.2%	64.5%

Percentages also visualized in bar chart.

2.6.7 Session Duration Time

KPI definition: Time from 200 OK Response to BYE Request.

(No table in this section.)

• Bar chart binned according to this legend:

	Count
Range	Value
< 30 sec	2.0
30 - 60 sec	40.0
60 - 90 sec	0.0
90 - 120 sec	0.0
2 - 3 min	0.0
3 - 5 min	0.0
5 - 10 min	0.0
10 - 30 min	0.0
30 - 60 min	0.0
1 - 2 h	0.0
> 2 h	0.0

2.6.8 Session Disconnect Delay

For the KPI definition, see section 2.5.1.

• Statistics tabulated as follows:

	Mean	Max	Min	Std Dev	Samples
Disconnect Delay	160.3	179	140	8.96	20

• Same statistics also displayed in bar chart binned according to this legend:

	% of Total
Range	Value
< 100	0.0
100, 150	15.0
150, 200	85.0
200, 500	0.0
500, 1000	0.0
> 1000	0.0

2.6.9 Session Completion Failure Cause

• Pie chart detailing failure causes as percentages of the total.

2.6.10 SIP Handshake Time

For the KPI definition, see section 2.5.1.

• Statistics tabulated as follows:

	Mean	Max	Min	Std Dev	Samples
SIP Handshake Time	249.83	1774	139	321.13	24

• Same statistics also displayed in bar chart binned according to this legend:

	% of Total
Range	Value
< 100	0.0
100, 150	20.8
150, 200	37.5
200, 500	37.5
500, 1000	0.0
> 1000	4.2

2.6.11 IMS Latency

For the KPI definition. see section 2.5.1.

• Statistics tabulated as follows:

	Mean	Max	Min	Std Dev	Samples
IMS Latency	3600.05	16519	1010	3968.12	21

• Same statistics also displayed in bar chart binned according to this legend:

	% of Total
Range	Value
< 500	0.0
500, 1000	0.0
1000, 1500	9.5
1500, 2000	14.3
2000, 2500	28.6
> 2500	47.6