The final test

E1 What is TSG RAN made of?

• One plenary that writes everything itself
• A plenary and six working groups, five of which still meet
• Six working groups with a rotating chair and no plenary

E2 Which group owns TS 38.300, the overall description this course reads?

• RAN3
• The RAN plenary
• RAN2

E3 An NG-RAN node is connected to the 5G core by which two interfaces?

• NG-C to the AMF and NG-U to the UPF
• Xn-C and Xn-U
• F1-C and F1-U

E4 Which sublayer ciphers and integrity-protects data on the radio?

• MAC
• RLC
• PDCP

E5 What is the practical difference between RRC_IDLE and RRC_INACTIVE?

• None; they are two names for the same state
• In inactive the last serving base station still holds the context and the connection to the core
• In inactive the device cannot be reached at all

E6 Once a specification is published, what is the only route to changing it?

• A liaison statement
• A change request
• A new study item description

E7 RAN4 has more active documents than any other group. What does that mostly consist of?

• Study reports — 352 of its 427
• Test cases
• Specifications, since it sets the radio limits

E8 A colleague explains why the plenary rejected a proposal last quarter. What is wrong with that?

• Only the chair may explain it
• Nothing — the reason is in the meeting report
• The data carries a status and never a reason, so any why is invented

E9 How many working groups sit under the RAN plenary, and how many of them still meet?

• Five working groups, all five still meeting
• Six working groups, five of them still meeting
• Six working groups, all six still meeting

E10 Which group owns the four documents that describe the 5G air interface — 38.211, 38.212, 38.213 and 38.214?

• RAN1
• RAN2
• RAN4

E11 By active documents, which group is largest? And by people in the room?

• RAN1 by both
• RAN4 by both
• RAN4 by documents, RAN1 by people

E12 What are the two kinds of node an NG-RAN can be built from?

• A base station and a router
• A gNB and an ng-eNB
• A gNB and an AMF

E13 Which four sublayers is layer 2 of NR split into?

• MAC, RRC, IP and TCP
• PHY, MAC, RLC and RRC
• MAC, RLC, PDCP and SDAP

E14 What is the first document in the life of a new piece of RAN work?

• A study item description put to the plenary
• A liaison statement
• A change request

E15 How often does the RAN plenary meet, and for how long?

• Twice a year, for two days
• Four times a year, usually four days
• Once a month, for a week