LTE UE

SAI provides full end to end solution for UE 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) with expected delivery in March, 2012.

UE PHY

UE 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
• Adaptive modulation and coding, QPSK, 16QAM, and 64QAM for DL. QPSK and 16QAM for UL
• Two frame structures: Type-1 shared by both full- and half-duplex FDD, Type-2 applicable to TDD
• Turbo code

UE PHY Functional BLOCK DIAGRAM:

UE 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

UE Protocol Stack

LTE Protocol Stack is implemented for User Equipment (UE) terminals compliant to the 3GPP Release 8 as well as Release 9 specifications. It consists of a fully optimized Layer 2, Layer 3 and NAS LTE protocol software enabling the highest uplink and downlink data rates. This module has been integrated & validated with IOT in multiple third party commercial processors and solutions.

The architecture is designed to be scalable and portable to different hardware platforms and operating systems with optimum processor utilization & low memory footprint. The LTE protocol stack is fully supported by a suite of advanced development, test and verification tools to enable rapid product development. SAI also provides dedicated support and customization services to assist with porting, integration and end-to-end LTE system verification from lab tests to field trials.

UE Protocol Stack Highlights

• Conformance to 3GPP standards through integration and validation with different systems as well as inter-operability with various infrastructure vendors
• Adaptable future-proof design to support continuously evolving standards towards LTE advanced (LTE Release 10 and beyond)
• Supports 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 can be customized to customer’s specific RTOS

LTE Layer 2

Layer-2 software consists 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

LTE Non Access Stratum (NAS)

The LTE NAS protocol software enables communication with the MME in the LTE core network and handles functions of mobility management and session management. Key features are:

• Security
• LTE SIM
• AT command handling
• Call control
• Mobility management

UE 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 (towards LTE Advanced , Release 10 and beyond)
• Product customization support for both remote and on-site
• Complete solution in reference platform