1

Emphasizing 5G System Measurements

Ingrid Moerman, Pieter Becue (iMinds)

2

Emphasizing Wireless System Measurements

Ingrid Moerman, Pieter Becue (iMinds)

3

Wired vs Wireless Measurements

• Connection to database server

Wired Wireless

High available bandwidth Limited available bandwidth

Connection is always available Connection might be unstable (e.g. mobile units moving out of reach of AP)

No interference (Unpredictable) wireless interference

Lots of wireless measurement traffic might destroy other wireless networks

4

Control over “When” & “What”

• “When” : Control the time• Ability to cache measurements

• If connection is unavailable• If measurements generate too much traffic &

interfere with solution under test

• “What” : Prioritize• Critical measurements are sent in real-time

• Small reports (e.g. alerts)• Non-critical measurements

• Periodic summary reports can be sent to server• Detailed measurements can be off-loaded to server

later

5

Enabling tools: OML

Central database server

Client applications

6

Enabling tools: OML Proxy server

Central database server

Client applications

7

OML Proxy Server states

Measurements are cached by local OML server

8

OML Proxy Server states

Measurements are forwarded to central server

9

Mobile experimentation @ w-iLab.t

10

Mobile experimentation @ w-iLab.t

1. Start of experiment: applications are started (robot is in docking station)

2. OML-proxy-server is paused: caching of measurements on robot

3. Robot is undocked and drives a path (defined by the user)

4. Robot returns to docking station and measurements are dumped to central OML server

11

Measurements in portable testbed

DUT

Wired Backbone

Wireless Experiment

DUT DUT DUT

Continuous measurents over Ethernet backbone

12

DUT

Wireless Backbone

Wireless Experiment

DUT DUT DUT

Measurements can saturate the backbone

Measurements in portable testbed

13

DUT

Wireless Backbone

Wireless Experiment

DUT DUT DUT

Backbone Control

Measurements in portable testbed

14

• Start/Stop dumping of measurements to server

• Traffic shaping• Critical measurements are sent instantaneously• Non-critical measurements can be cached

• Unless e.g. temperature measurements exceed a certain treshold

• Periodic reports can be sent to database server• Contain aggregated data (Min/Max/Avg/ or other…)• Used as status update for experimenter/administrator

• Shut down DUT if misbehaving• E.g. when Wireless experiment interferes heavily with

backbone

Backbone Control

15

Conclusion

• Wireless measurements (in testbed)• need extra control• need traffic shaping

• caching• prioritisation• data aggregation

• wireless backbone: out of band

• Similar concept can be applied in 5G networks

• traffic shaping integrated in DUT• CHALLENGE: inband versus out-of-band control

THANK YOU FOR YOUR TIME

?Questions