4G Mobile core and Access n/w planning Flashcards
__________ is the maximum data rate that a single cell can handle
1) spectral efficiency
2) channel capacity
channel capacity
Motivations for LTE
1) move everything to packet-switched domain
2) reduce latency
3) UMTS and GSM has become complex
4) all the above
all the above
3G networks introduce delays of the order of ___ milliseconds for data
applications.
1) 10 milliseconds
2) 100 milliseconds
3) 500 milliseconds
100 milliseconds
EPC stands for
Evolved Packet Core
- is a direct replacement for the packet
switched domain of UMTS and GSM.
It distributes all types of information to the user, voice as well as data, using the packet switching technologies
UTRAN stands for
UMTS Terrestrial Radio Access Network
3GPP work item for core network
1) SAE (system architecture evolution)
2) LTE (long term evolution )
SAE (system architecture evolution)
- LTE is for radio access network
- the whole system with LTE is known as the evolved packet system (EPS)
GPP work item for radio access network, air interface and mobile
1) SAE (system architecture evolution)
2) LTE (long term evolution )
LTE (long term evolution )
- SAE is for core network
- the whole system with SAE is known as the evolved packet system (EPS)
Officially LTE refers only to the evolution of the
1) radio access network
2) air interface
3) mobile
air interface
Despite this official usage, LTE has become a colloquial name for the whole system, and is regularly used in this way by 3GPP.
parameter which expresses the typical capacity of one cell per unit bandwidth
1) spectral efficiency
2) channel capacity
spectral efficiency
the time taken for data to travel between the mobile phone and the fixed network should be less than ___ milliseconds
1) 1 milliseconds
2) 5 milliseconds
3) 10 milliseconds
5 milliseconds
phone should switch from standby to the active state, after an intervention from the user, in less than __ milliseconds
1) 10 milliseconds
2) 50 milliseconds
3) 100 milliseconds
100
milliseconds
LTE is optimized for cell sizes up to ___ km, works with degraded performance up to ___ km and supports cell sizes of up to ____ km
1) 5, 20, 50
2) 5, 30, 80
3) 5, 30, 100
4) 5, 50, 100
5, 30, 100
LTE is optimized for mobile speeds up to ___ km/hr, works with high performance up to ___ km/hr and supports speeds of up to ___ km/hr.
1) 10, 100, 300
2) 15, 120, 350
3) 20, 150, 300
4) 15, 150, 350
15, 120, 350
LTE is designed to work with a variety of different bandwidths, which range from _____ to ______
1) 1 MHz to 10 MHz
2) 1 MHz to 20 MHz
3) 1.5 MHz to 25 MHz
4) 1.4 MHz to 20 MHz
1.4 MHz to 20 MHz
the maximum time required for data to travel across the EPC
1) 10 milliseconds
2) 50 milliseconds
3) 100 milliseconds
4) no requirement
no requirement.
but relevant specification suggests a user plane latency of 10 milliseconds for a non-roaming mobile, increasing to 50 milliseconds in a typical roaming
scenario. adding delay across the air
interface, giving a typical delay in a non-roaming scenario of around 20 milliseconds.
EPC is also required to support inter-system handovers between
1) LTE and earlier 2G and
3G technologies
2) cdma2000
3) WiMAX
4) all the above
all the above
The EPC is designed as a data pipe that simply transports information to and from the user: it is not concerned with the information content or with the application (T/F)
T
The EPC simply transports the voice packets in the same way as any other data stream.
EPC user plane latency in a non-roaming scenario is around
1) 10 milliseconds
2) 20 milliseconds
3) 50 milliseconds
20 milliseconds.
UMTS Handovers
1) Soft
2) Hard
3) Both
Both
LTE Handovers
1) Soft
2) Hard
3) Both
Hard only
Neighbour lists ________ for UMTS and ________ for LTE
1) always required, always required
2) always required, not required
3) not required, always required
4) not required, not required
Always required for UMTS and not required for LTE
IP connectivity is ________ for UMTS and ________ for LTE
1) after registration, after registration
2) after registration, during registration
3) during registration after registration
4) during registration during registration
after registration for UMTS and during registration for LTE
_______ replaces the old Node B / RNC combination from 3G
1) eNodeB
2) gNodeB
3) ngNodeB
Evolved Node B (eNB)
It is the only network element defined as part of EUTRAN
_______ is/are the only network element(s) defined as part of EUTRAN
1) eNB
2) RRH
3) EPC
4) All the above
Evolved Node B (eNB) is the only network element defined as part of EUTRAN
inter-eNB handovers are possible without direct involvement of EPC during this process (T/F)
True.
inter-eNB interface X2 helps this.
