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Transport Layer (L4) of MIPI Unipro - An Introduction

The document provides an overview of the transport layer (L4) of the MIPI UniPro protocol. It discusses the functionality of the transport layer, including segmentation and reassembly, addressing, connections, error handling, and flow control. It also describes the structure of transport protocol data units and some of the protocol's features, such as address translation, segmentation, reassembly, and explicit flow control. The implementation of the transport layer in Arrow's layered building block framework is also briefly mentioned.

1 of 19
April 2014
Transport	
  Layer	
  (L4)	
  Of	
  MIPI	
  UniPro	
  
Chandra Bhushan Singh
An Introduction
 	
  Presenta)on	
  Outline	
  
•  Introduc)on	
  
•  Func)onality	
  
•  Structure	
  of	
  	
  T_PDU	
  	
  
•  Protocol	
  Features	
  	
  
•  Segment	
  Transmission	
  
•  Segment	
  Recep)on	
  
•  Arrow	
  L4	
  BFM	
  Implementa)on	
  	
  	
  
•  Benefits	
  
2	
  
MIPI	
  Unipro	
  Transport	
  Layer	
  (L4)	
  
•  Top	
  Layer	
  of	
  MIPI	
  UniPro	
  (Unified	
  Protocol)	
  
•  Connects	
  the	
  Applica)on	
  to	
  MIPI	
  UniPro	
  
Stack	
  
3	
  
 	
  Applica)on	
  
4	
  
 	
  Transport	
  Layer	
  Model	
  
5	
  
 	
  Func)onality	
  
•  Segmenta)on	
  and	
  Reassembly	
  
•  Addressing	
  
•  Segment	
  format	
  recogni)on	
  
•  Connec)ons	
  
•  End-­‐to-­‐End	
  flow-­‐control	
  
•  Error	
  handling	
  
6	
  

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Transport Layer (L4) of MIPI Unipro - An Introduction

  • 1. April 2014 Transport  Layer  (L4)  Of  MIPI  UniPro   Chandra Bhushan Singh An Introduction
  • 2.    Presenta)on  Outline   •  Introduc)on   •  Func)onality   •  Structure  of    T_PDU     •  Protocol  Features     •  Segment  Transmission   •  Segment  Recep)on   •  Arrow  L4  BFM  Implementa)on       •  Benefits   2  
  • 3. MIPI  Unipro  Transport  Layer  (L4)   •  Top  Layer  of  MIPI  UniPro  (Unified  Protocol)   •  Connects  the  Applica)on  to  MIPI  UniPro   Stack   3  
  • 5.    Transport  Layer  Model   5  
  • 6.    Func)onality   •  Segmenta)on  and  Reassembly   •  Addressing   •  Segment  format  recogni)on   •  Connec)ons   •  End-­‐to-­‐End  flow-­‐control   •  Error  handling   6  
  • 7.    Structure  of  T_PDU   7  
  • 8.    Cport  ASributes   8   •  T_PeerDeviceID   •  T_PeerCPortID   •  T_Connec)onState   •  T_TrafficClass     •  T_CPortFlags     •  T_TxTokenValue     •  T_RxTokenValue   •  T_LocalBufferSpace     •  T_PeerBufferSpace   •  T_CreditsToSend     •  T_CPortMode  
  • 9.    Protocol  Features   •  Connec)on  Management  Feature   •  Address  Transla)on  Feature   •  Segmenta)on  Feature   •  Reassembly  Feature   •  T_PDU  Composi)on  Feature   •  T_PDU  Decomposi)on  Feature   •  Header  Format  Analysis  Feature   •  Explicit  Flow  Control  Features   9  
  • 10.    Address  Transla)on  Feature   •  CPortIDs   •  T_PeerCPortID   •  DeviceIDOffset   •  DestCPortID_Enc   10  
  • 13.    T_PDU  Composi)on  Feature   13  
  • 14.    T_PDU  Decomposi)on  Feature   14  
  • 15.    Explicit  Flow  Control  Features   •  End-­‐to-­‐End  Flow  Control  Feature   •  Controlled  Segment  Dropping  Feature   •  CPort  Safety  Valve   15  
  • 16.    MIPI  UniPro  Test  Feature   16  
  • 17.    Arrow  L4  BFM  Implementa)on   17  
  • 18.    Benefits   •  Generic  -­‐  Can  be  used  for  a  wide  range  of  applica)ons  and   data  traffic  types   •  Scalable  -­‐  From  individual  links  to  a  network  with  up  to   128  UniPro  devices   •  Bandwidth  U)liza)on  -­‐  Provides  features  to  manage   conges)on  and  control  arbitra)on   •  Shareable  -­‐  Different  traffic  types  and  UniPro  devices  can   share  pins  and  wires   •  Testable  -­‐    UniPro  mandates  features  to  facilitate   automated  conformance  tes)ng   18