LTE eNodeB

LTE eNodeB is partitioned into following categories:

  • Radio
  • Physical Layer (PHY)
  • Protocol Stack & Applications
  • Customizable Digital Frontend

SAI provides full end to end solution for eNodeB PHY and Protocol Stack in combination with any third party radio. The solution complies fully with 3GPP LTE Release 8 and Release 9. SAI is also developing a complete compliant solution for LTE Advanced (Release 10 & beyond) available by March, 2012.

eNodeB PHY

eNodeB PHY Highlights

  • OFDMA in DL and SC-FDMA in UL
  • Duplexing schemes; full/half duplex FDD, and TDD
  • Scalable channel bandwidth up to 20 MHz and higher bandwidths of 40 MHz to 100 MHz with LTE Advanced
  • MIMO processing with 2x2 UL and 4x4 DL antennas with layering and pre-coding options & higher MIMO configurations up to 8x8 in LTE Advanced
  • Adaptive modulation and coding, QPSK, 16QAM, and 64QAM for DL
  • Two frame structures: Type-1 shared by both full- and half-duplex FDD, Type-2 applicable to TDD Turbo code

eNodeB PHY Functional BLOCK DIAGRAM:

eNodeB PHY Deliverables

  • Matlab IP source code
  • C/ DSP IP source code
  • DSP based implementation
  • FPGA based implementation Verilog/VHDL
  • Test Bench/Test Vector
  • Software reference design document
  • Protocol test tool code
  • Complete reference design kit
  • User manual

eNodeB Protocol Stack

  • Conformance to 3GPP standards through integration and validation with different systems as well as inter-operability with leading infrastructure vendors
  • Adaptable future-proof design to support continuously evolving standards towards LTE-Advanced (LTE Release 10 and beyond)
  • Supports highest UE category (maximum LTE data rates)
  • Scalable and portable to integrate with different embedded hardware platforms and operating systems
  • Designed to meet optimum memory and performance requirements
  • Comprehensive set of debug trace and statistical logging tools supported
  • Supported OS are: Linux , Android, WinCE, VxWorks, Nucleus and also can be customized to customer’s specific RTOS

LTE Layer 2

Layer-2 software consists of the comprehensive implementation of the LTE MAC, RLC and PDCP protocol sub-layers. Key features are:

  • MAC – All LTE transport channels with optional MBMS
  • RLC – UM, TM, AM modes
  • PDCP – Ciphering, integrity protection and ROHC v1 and upgraded ROHC v2

LTE Layer 3

The LTE Layer 3 software comprises of the Radio Resource Control (RRC) protocol. The LTE RRC layer provides broadcast of system information; configures the RLC, MAC and PDCP layers; carries out mobility functions and QoS management functions. Key features are:

  • System information handling
  • Paging
  • Measurements and cell reselection
  • Handover
  • RRC security and integrity

Radio Resource Management (RRM)

Radio resource management (RRM) – This covers all functions related to the radio bearers, such as radio bearer control, radio admission control, radio mobility control, scheduling and dynamic allocation of resources to UEs in both uplink and downlink.

eNodeB Protocol Stack Deliverables

  • Binary or ANSI C source code for core protocol components
  • OS abstraction layer for target RTOS/platform
  • Fully documented APIs with user manuals
  • Continuous update of functionality based on the latest 3GPP LTE Standards
  • Product customization support services for both remote and on-site
  • Full solution on reference platforms based on PowerPC, MIPS, Arm and x86.