Flexible RLC PDU Size was interdicted in Release 7 in order to decrease RLC protocol overhead and to avoid sequence number stalling

Flexible RLC is used with MAC-ehs in Release 7. Mac-ehs is a new feature interdicted in Release 7 to increase the downlink throughput.

UMTS-RLCDecoder is small but powerful tool for decoding RLC header information both for Acknowledged Mode RLC PDUs and Unacknowledged Mode RLC PDUs.

It Can decode the following

• RLC AMD PDU Header and Length Indicator
• RLC Control PDUs including SUFIs
• RLC UMD PDU header and Length Indicator

The STATUS PDU is used to exchange status information between two RLC AM entities.

In this tutorial following topics are discussed:

• What is SUFI RLIST?
• Different fields in the SUFI RLIST
• Example with encoding details

This tutorial describes the UMTS RLC SUFI LIST.

In this tutorial following topics are discussed:

• What is SUFI LIST?
• Different fields in the SUFI
• Example with encoding details

The STATUS PDU is used to exchange status information between two RLC AM entities.

In this tutorial following topics are discussed:

• Why STATUS PDU is required?
• Status PDU Parameters
• Different type of SUFIs
• SUFI ACK described with an example

The Length Indicator is used to indicate, each time, the end of an SDU occurs in the PDU. The Length Indicator points out the number of octets between the end of the last Length Indicator field and up to and including the octet at the end of an SDU segment.

This tutorial gives detail description about RLC AM and UM data PDU encoding.

Logical channels define ‘WHAT’ type of information is being transferred and transport channel defines ‘HOW’ the information is being transferred.

In this tutorial different types of logical channels and transport channels and their mappings are described.

Radio Link Control Protocol (RLC) is a layer 2 protocol in the UMTS system. This tutorial is an overview of RLC functionalities and architecture.

• Radio Interface Architecture
• RLC main functionalities
• Data flow between layers
• Model of RLC Sublayer
• RLC Protocol Data Unit
• RLC State Model