Podcast
Questions and Answers
The Physical Hybrid Indicator Channel transmits user data.
The Physical Hybrid Indicator Channel transmits user data.
False
The MME is responsible for managing and storing UE contexts in EPC.
The MME is responsible for managing and storing UE contexts in EPC.
True
The Life Cycle of a UE includes the step of Radio Access bearer before Authentication.
The Life Cycle of a UE includes the step of Radio Access bearer before Authentication.
False
The S1-AP protocol uses TCP as a tunneling protocol between eNodeB and MME.
The S1-AP protocol uses TCP as a tunneling protocol between eNodeB and MME.
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In LTE-EPC, the MME is responsible for distributing Paging messages.
In LTE-EPC, the MME is responsible for distributing Paging messages.
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The Physical Control Format Indicator Channel indicates the number of OFDM symbols used for control information.
The Physical Control Format Indicator Channel indicates the number of OFDM symbols used for control information.
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In LTE-EPC, the MME is responsible for selecting the S-GW and MME.
In LTE-EPC, the MME is responsible for selecting the S-GW and MME.
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The Physical Uplink Control Channel transmits carrier information and acknowledgements.
The Physical Uplink Control Channel transmits carrier information and acknowledgements.
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In LTE, E-UTRAN consists of Evolved NodeB (eNodeB) and Mobility Management Entity (MME).
In LTE, E-UTRAN consists of Evolved NodeB (eNodeB) and Mobility Management Entity (MME).
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The primary function of the Home Subscription Server (HSS) is to manage roaming and authentication.
The primary function of the Home Subscription Server (HSS) is to manage roaming and authentication.
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The Evolved Packet Core (EPC) is responsible for radio resource management.
The Evolved Packet Core (EPC) is responsible for radio resource management.
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The Mobility Management Entity (MME) is responsible for tracking areas list management.
The Mobility Management Entity (MME) is responsible for tracking areas list management.
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The Evolved NodeB (eNodeB) is responsible for NAS signaling and its security.
The Evolved NodeB (eNodeB) is responsible for NAS signaling and its security.
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The Evolved Packet Core (EPC) is composed of the Mobility Management Entity (MME) and the Home Subscription Server (HSS).
The Evolved Packet Core (EPC) is composed of the Mobility Management Entity (MME) and the Home Subscription Server (HSS).
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The Evolved NodeB (eNodeB) is responsible for routing of user plane data from/to S-GW.
The Evolved NodeB (eNodeB) is responsible for routing of user plane data from/to S-GW.
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The Home Subscription Server (HSS) is responsible for EPS bearer management.
The Home Subscription Server (HSS) is responsible for EPS bearer management.
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LTE Rel-10 introduced carrier aggregation to support system bandwidths of up to 20 MHz.
LTE Rel-10 introduced carrier aggregation to support system bandwidths of up to 20 MHz.
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Carrier aggregation enables operators to use different chunks of spectrum in the same frequency band.
Carrier aggregation enables operators to use different chunks of spectrum in the same frequency band.
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In LTE-Advanced, the enhancements to UE categories include carrier aggregation and Coordinated Multi-point operation.
In LTE-Advanced, the enhancements to UE categories include carrier aggregation and Coordinated Multi-point operation.
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LTE Rel-8/9 supports peak data rates in excess of 1 Gbps for low mobility scenarios.
LTE Rel-8/9 supports peak data rates in excess of 1 Gbps for low mobility scenarios.
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Carrier aggregation enables operators to use up to 50 MHz of combined bandwidth.
Carrier aggregation enables operators to use up to 50 MHz of combined bandwidth.
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Intra-band contiguous carrier aggregation and intra-band non-contiguous carrier aggregation are two possible deployment scenarios.
Intra-band contiguous carrier aggregation and intra-band non-contiguous carrier aggregation are two possible deployment scenarios.
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Each component carrier in carrier aggregation can have a bandwidth of 1.4, 3, 5, 10, 15, or 20 MHz.
Each component carrier in carrier aggregation can have a bandwidth of 1.4, 3, 5, 10, 15, or 20 MHz.
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LTE-Advanced introduces enhanced multi-antenna techniques, including SU-MIMO and MU-MIMO.
LTE-Advanced introduces enhanced multi-antenna techniques, including SU-MIMO and MU-MIMO.
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Study Notes
Physical Channels in LTE
- Transmits user data
- Physical Uplink Control Channel (PUCCH)
- Physical Control Format Indicator Channel (PCFICH) indicates carrier information, channel number, OFDM symbols used for control information, quality, and acknowledgements
- Physical Hybrid Indicator Channel (PHICH) transmits ACK/NACK for scheduling requests and uplink data
Protocol Stack in LTE
- MME (Mobility Management Entity) is present in the protocol stack
LTE-EPC Overview
- Life cycle of a UE involves: • Network Acquisition • Signaling connection • Attach • Authentication • IP Connectivity • Service Request • Radio Access bearer • Scheduling requests and grants • Handover • Release
Mobility Management Entity (MME)
- MME is responsible for: • Managing and storing UE contexts • Generating temporary UE identifiers • Managing idle state mobility • Distributing paging messages • Controlling security functions like authentication • Controlling EPS bearers • Selecting S-GW and P-GW
- MME uses SCTP (Stream Control Transmission Protocol) tunneling protocol between eNodeB and MME
Network Architecture in LTE
- LTE architecture consists of: • Radio Access Network: Evolved UTRA Network (E-UTRAN) • Core Network Architecture: Evolved Packet Core (EPC)
Network Architecture in E-UTRAN
- Evolved NodeB (eNodeB) is responsible for: • Radio Resource management • Synchronization and interference control • MME selection among MME pool • Routing of user plane data from/to S-GW • Encryption/Integrity protection of user data • IP Header Compression
Network Architecture in EPC
- MME is responsible for: • NAS (Non-Access Stratum) signaling and its security • Tracking Areas List management • PDN GW and SGW selection • Roaming and authentication • EPS bearer management • Signaling for mobility management between 3GPP RANs
Network Architecture in EPC (Contd.)
- Home Subscription Server (HSS) is responsible for: • User authentication • Subscription/Profile management (roaming, speed/throughput limits)
LTE Advanced
- LTE-Advanced (LTE Rel 10/11) introduced new features: • Carrier Aggregation • Enhanced Multi-Antenna techniques (SU-MIMO and MU-MIMO) • Coordinated Multi-point operation (COMP) • Enhancements to UE Categories
Carrier Aggregation
- Carrier Aggregation enables: • Wider transmission bandwidths up to 100 MHz • Operators to use different chunks of spectrum in combination to deliver greater throughputs to UEs • Operators to use fragmented pieces of spectrum
- Deployment scenarios: • Intra-band contiguous carrier aggregation • Intra-band non-contiguous carrier aggregation • Inter-band non-contiguous carrier aggregation
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Description
This quiz covers the different physical channels in 5G, including the Physical Uplink Control Channel, Physical Control Format Indicator Channel, and Physical Hybrid Indicator Channel.
