What MIB table would you use to measure the QoS of service flow in a fixed wirel

Question

What MIB table would you use to measure the QoS of service flow in a fixed wireless system between the base station and the subscriber station.                                                    [1 mark].

Question No. 2

Define Latency and Jitter of service flow in a fixed wireless system. [2 marks]

Question No. 3

Give three differences between Multichannel Multipoint Distribution Service (MMDS) and Local Multipoint Distribution Service (LMDS). [3 marks]

Question No. 4

Answer these questions shortly:

What is a splitter for ADSL ?

What is a configuration profile for an ADSL interface?

What are the possible modes of configuration profile?

[3 marks]

Explanation / Answer

MIB means Management Information Base. It is used to organized data hierarchically.
•   The base station and the subscriber stations are managed nodes that act as an agent
•   QoS (Quality of Service) allows a single cable modem for multiple service flows to the help of data
•   ‘Tabular object’ MIB table is support to the QoS of service flow in a fixed wireless system between the base station and the subscriber station
•   This table between the base station and the subscriber station will be carried over secondary management CID
•   Best example of tabular object is interface table( ifTable)

Q2

Latency represents the network's speed. It shows the delays that occur in data communication over a network
•   To travel from source to destination and vice versa by using the network channel. This latency depends on date taken
•   The high-latency network connection produces long delay times
•   The low-latency network connective produces small delay times
•   The fixed wireless system contains a low latency.

Jitter represents the time variation of arrival to the destination. It is used in packet networks
•   Communication problems are not come in jitter, but packet loss or information loss occurred in the heavy jitter process
•   Jitter depends upon the latency
•   When the latency is high, the variation (jitter) also results high and vice-versa
•   The fixed wireless system contains a low jitter.
The guaranteed high speeds in fixed wireless network enable in video conferencing without any pixilation and makes it perfect for telepresence

Q3

LMDS
•   Local Multipoint Distribution Service
•   The LMDS architecture consists of NOC (Network Operation Center), BS, CPE and Fiber backbone. It has cellular like architecture.
•   Frequency of operation   28 GHz, 36 GHz
•   CPE cost and deployment cost is medium to high
•   Data rate   1 to 10 Mbps
•   Network Topology is P2MP (Point to Multi-point)

MMDS

•   Multichannel Multipoint Distribution Service
•   The MMDS architecture consists of tall antenna tower, backbone internet connectivity using router and network management system. It has microwave link like architecture
•   Frequency of operation 2.5 GHz, 3.5 GHz
•   CPE cost and deployment cost is low compare to LMDS.
•   Data rate is up to 2Mbps
•   Network topology is P2P (point to point)

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