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| LTE UE Terminal Protocol Stack |
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The 4M Wireless PS100 LTE Protocol Stack is a 3GPP Release 8 compliant implementation of the LTE protocol stack for User Equipment (UE) terminals. It consists of a fully optimized Layer 2, Layer 3 and NAS LTE protocol software enabling the highest uplink and downlink data rates.
The PS100 architecture is designed for flexibility and ease of integration on different hardware platforms and operating systems. The protocol stack implementation enables optimal power consumption and processor utilization.
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| Commercial LTE chip sets and terminals |
The 4M Wireless LTE stack caters to the ultra low power and low cost consumer devices market for LTE including multi-mode wireless handsets, data cards and USB wireless modems as well as embedded devices for laptops, Ultra Mobile PCs and desktops. |
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Companies new to the LTE space will be able to integrate the 4M Wireless LTE terminal stack solution with their existing physical layer to provide a quick entry to the LTE and UMTS spaces. Such companies will quickly see the benefits of the PS100's low power consumption and small memory footprint. The unique multi-target architecture of the LTE software also provides them with a flexible and bespoke solution that can be tailored to fit a wide variety of baseband chipsets.
The LTE protocol stack is fully supported by a suite of advanced development, test and verification tools to enable rapid product development. 4M Wireless 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. |
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| Product and Customer Benefits |
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Guaranteed conformance to 3GPP standards through rigorous module, integration and system testing as well as inter-operability testing with leading infrastructure vendors
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Adaptable future-proof design to support continuously evolving standards
- Supports highest UE category (maximum LTE data rates)
- Flexible and easy 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
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| Product deliverables |
- Complete ANSI C source code for core protocol components
- OS abstraction layer for target RTOS/platform
- Fully documented APIs with user manuals and examples
- Optional ASN.1 encoder-decoder library
- Continuous update of functionality based on the latest 3GPP LTE Standards
- Product customization support services including remote and on-site support
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| Product functionality |
LTE Layer 2  |
The LTE Layer 2 software consists of the comprehensive implementation of the LTE MAC, RLC and PDCP protocol sub-layers. Features include:
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MAC – All LTE transport channels with optional MBMS ...details
- Mapping between logical channels and transport channels
- Multiplexing/demultiplexing of SDUs
- Traffic volume measurement reporting
- Error correction through HARQ
- Priority handling between logical channels of one UE and a number of UEs by means of dynamic scheduling
- Transport format selection and padding
RLC – UM, TM, AM modes ...details
- Transfer of upper layer PDUs supporting acknowledged mode (AM) or unacknowledged mode (UM) and transparent mode (TM) data transfer
- Error Correction through ARQ
- Segmentation of SDUs and Re-segmentation of PDUs
- Concatenation of SDUs for the same radio bearer
- In-sequence delivery of upper layer PDUs
- Duplicate Detection, SDU discard as well as protocol error detection and recovery
PDCP – Ciphering, integrity protection and ROHC v1 (With an upgrade path to ROHC v2) ...details
- Transfer of user data from NAS to RLC and vice versa
- In-sequence delivery of upper layer PDUs at handover for RLC AM
- Duplicate detection of lower layer SDUs at handover for RLC AM
- Retransmission of PDCP SDUs at handover for RLC AM
- Header compression and decompression to improve transmission for latency sensitive data eg. VoIP and video conferencing
- Ciphering functionality for security
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| 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 include:
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System information handling
Paging
Measurements and cell reselection
Handover
RRC security and integrity
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| LTE Non Access Stratum (NAS) |
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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 include:
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Security
LTE SIM
AT command handling
Call control
Mobility management |
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| More details
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Contact our sales team directly or via email at sales@4mwireless.com for further information, product demonstrations or to discuss of how we could assist you. |
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