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Wireless

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HSC offers Turnkey offerings for design, development and maintenance of carrier grade core network (macro, micro, pico, femto) and terminal infrastructure components for LTE, WiMAX, WiFi, CDMA/UMTS, GSM/EDGE, WCDMA and CDMA 2000. Proven data/control path design patterns ensure highly available, distributed and high through put driven solutions for ATCA and Bladeserver platforms.

White Paper/Open Sources related to Wireless

Transition from IPv4 to IPv6 Abstract: This paper explains and discusses the current transition mechanisms to IPv6 and their applicability to different network scenario. Also discussed is the evolutionary work being done in different IETF working groups to address new realities in the IPv6 deployment. Read more...
Making Agile Work on Offshore Development Abstract: HSC recently participated in the prestigious Project Management Leadership (PML) 2011 event where we presented our experiences in successfully applying Agile methodologies to large projects executed offshore from the customer site.The paper was selected as a runner up in the abovementioned event. Abstract: Other than understanding the organizational and cultural aspects related to application of Agile methods, modification and adaptation of Agile practices to suit the organization’s business context and existing systems and processes is imperative for making Agile work. Read more...
A unique project management model for end-end delivery Abstract: In the today’s market scenario of intense competition, the organizations face the challenges of low price and high quality. The traditional model of separate teams for delivery puts additional burden on these factors adding to additional pressure. The key to success is knowledge re-use wherever possible and spreading the roles and responsibilities across the different delivery phases. The intent of the paper is to highlight one such practice for handling these challenges. Read more...
H(e)NodeB Security Abstract: Femtocell access points (H(e)NBs) are close-range, limited-capacity base stations that utilize residential broadband connections to connect to carrier networks. The use of such distributed base station architecture improves reception and allows the operators to deliver fast, seamless, high-bandwidth cellular coverage into the homes and offices of their end customers. The deployment of Femtocell solutions is attractive to mobile network operators as they successfully address coverage and mobile data bandwidth requirements by leveraging widely available broadband connections without the additional cost associated with the alternative macro-cell deployment. Security is the most challenging area and critical aspect to prevent unauthorized access to important resources in any wireless communication network. Read more...
Using SIP over 6Lowpan devices for the Smart Grid Abstract: This document is an Internet-Draft The Smart Grid initiative is an effort in modernization of the electricity grid using communication technology with the primary goals of reducing energy consumption, reducing cost (utilities and consumers), increasing reliability and the creation of new services for all participants in the value chain. Read more...
Generic Design Framework for a Wireless MAC Data Path Abstract: Recent years have seen a phenomenal growth in demand for residential broadband. With the advent of small form-factor high performance integrated SoCs (see, for example, the TI) and short area broadband wireless technologies (Wi-Fi and the upcoming WiMAX/LTE), the broadband access point or Base Station Router (BSR) is becoming a mass-market item. Read more...
Automotive Telematics Abstract: At its core, automotive telematics deals with services provided to vehicles over a telecommunications device. Some of the key services presently available in the domain of automotive telematics include: Automatic Crash Notification Roadside Assistance Services Vehicle Tracking Remote Door Services Navigation Assistance Traffic Assistance Concierge Services Infotainment Services Fleet Management Diagnostics The future of the Telematics would be affected by the increased availability of bandwidth and the penetration of the wireless network infrastructure. Read more...
Downlink Link Budget Analysis for a DVB-SH System Abstract: The DVB-SH (Digital Video Broadcasting – Satellite to Handheld) system is the latest of a series of specifications that enables broadcast quality video to be relayed directly from a broadcast network, and displayed on a handheld/portable/mobile device. Read more...
ALSD : Adaptive Local Surface Deconstruction Abstract: An algorithm for noise erasure and structural information recovery for surfaces with structural discontinuaties Read more...
Engineering QoS Abstract: Given the limiting nature of the communication channel in a communication system, the end user applications (such as browsers, FTP clients, media clients) experience certain effects of the communication channel. These effects, such as delay, throughput, error rates, variation in delay etc. Read more...
TCP revisited Abstract: TCP is transmission Control Protocol, the Layer4 protocol for communication over both wireline as well as wireless links. It is one of the most widespread of protocols in usage today. All key applications defining the web today, http, email transfer, file transfer, etc. Read more...
GNU Radio Abstract: GNU Radio is a collection of software that when combined with minimal hardware, allows the construction of radios where the actual waveforms transmitted and received are defined by software. What this means is that it turns the digital modulation schemes used in today's high performance wireless devices into software problems. Read more...

Case studies related to Wireless

UMTS Femtocell product architecture Abstract: An OEM wanted to do a product analysis and architecture specification for UMTS Femtocell for emerging markets. HSC consultants delivered detailed analysis reports including: Use Cases Regulatory environment compliance cost and performance target comparisons recommendation for hardware and software Recommended architecture specification Read more...
802.20 (iBurst) network design Abstract: A service provider was looking to setup a multi-city cellular network based on iBurst. HSC consultants helped this customer in the following areas: Analysis of the 802.20 iBurst air interface proposal Link analysis for coverage/capacity Design of base-stations Capacity and coverage area for different consumer types (residential/enterprise) Deployment configurations for different demographic areas Proposed network architecture using blend of macro and micro base-stations Projected cost per subscriber Options for core network integration Read more...
End-End IMS R7 based network design for hyrbid network Abstract: HSC worked with a greenfield operator which wanted to deploy an all IP IMS R7 based architecture for enabling next generation services. HSC consultants led the design and specification of this network. Some of the areas involved: Create network design Create RFI based on network design and invite different vendors to respond Evaluate RFI responses and interview vendors on technology fitment Create gap analysis of areas which were not technically ready for all IP rollout Read more...
Analysis of WiMAX over Satellite Abstract: HSC did an exact estimation of Wimax over a satellite link. A quantitative and qualitative analysis was done for performance, capacity (in terms of voice calls per MHz), setup time of voice calls and various overheads viz. spectral over heads, protocol overheads etc. Read more...
WiMax Base Station Development Abstract: HSC designed and developed WiMax MAC SW for a leading WiMax chipset OEM. MAC Layer based on 802.16e standard was designed to support 10Mbps in Downlink and 4Mbps in Uplink per MS. Customer Benefits: Modular design with rich, defined interfaces Easy extensibility for features Independence of design and testing Development of Simulators to aid feature testing Development of generic Data Path Framework which can be reused by Customer Salient features of the project were: Read more...
eNodeB Data Path Prototype Abstract: HSC has developed an in-house framework for high speed data path implementation using Linux IP Stack. The module is extensible and can be coupled with a standalone control plane with minimal effort. This framework was used to exhibit LTE Layer 2 functionality (RLC/MAC). Read more...
Satellite Terminal Access Stratum Abstract: HSC has been involved in Design, development and integration of Satellite Access Stratum (AS). based on 3GPP Release 6 Specifications. HSC was responsible for complete AS Design/development as well as integration with multiple interfaces viz. Non-Access Stratum (NAS), Physical Layer, Network and Platform. Read more...
WiMAX Base Station Emulator Abstract: HSC was involved in development of Test Framework to test WiMAX Subscriber Station. HSC developed MAC Layer and Test Engine for this purpose. Additionally HSC was also responsible to developing Test Specifications based on 802.16e and executing those test cases. Read more...
Design and Implementation of multi gigabit ASN GW Fast Path Abstract: The ASN GW Fast Path solution was a performance oriented architecture in a multi-card configuration hosting an AMCC network processor. The salient implementation aspects include initialization of 24 tasks as active and background tasks, usage of AMCC instruction set is used to program the multi-threaded NP core, i/f with multiple co-processors present in NP , microcode interfaces with on-chip TCAM and NSC over LA-1 interface for deep packet inspection, microcode interfaces for Linux based Host (Control plane). Customer Benefits: The solution has differentiating features as compared to other commercially available features. Read more...
CPE Agent Development Abstract: The need was to develop a CPE agent compliant to TR-069 and TR-098 specifications for management by ACS. CPE agent was required to facilitate management of TR-069 based accessible parameters (TR-106) and support data model for provisioning of a voice-over-IP (VoIP) CPE device (TR-104). A CPE agent was developed in compliance to TR 069, TR 104 and TR 106 specifications. Salient features of the CPE Agent are follows: Initial CPE configuration, Re-provisioning at any subsequent time, Vendor-specific configurations. Status and performance monitoring of the CPE. File download initiation, dynamic notifications. The solution supports: All mandatory Events Notifications. All mandatory SOAP based RPC support. HTTP message exchange between CPE and ACS Server using Secured Transport (SSL 3.0 /TLS 1.0) and X.509 certificate verifications. Customer Benefits: Specification based agent allows for extensible and flexible design. Many companies and operators have adopted TR-069. Read more...
RTL implementation of L1 datapath as per 3GPP LTE Rel 8 specifications Abstract: HSC developed a Layer 1 processing solution targeted on FPGA. The RTL code was developed to meet the throughput and latency requirements of 3GPP LTE. The RTL blocks for layer 1 processing were developed to be used as a coprocessor which can be easily integrated with a processor to schedule layer 1 processing. Read more...
DVB-s2 satellite modem Abstract: The architecture below comprises of a Broadband VSAT system consisting of FPGAs having interface with DSP & custom SoC. The Adaptive coding and modulation (ACM) feature means that the coding (FEC rate) and modulation DVB-S2 outbound carrier can be dynamically modified to optimize the performance per terminal. Read more...
RTL verification of OBSAI RP3 Interface Abstract: Open Base Station Architecture Initiative (OBSAI) is an industry standard baseband and RF unit interface. HSC developed a top level verification plan and identified test cases to verify the interface and functionality of OBSAI RP-3 core targeted on the Xilinx Virtex 5 device. Customer Benefits: Experience in developing automated verification environment Identified possible test cases based on system requirement definition Worked in offshore model Read more...
3G Layer 1 development Abstract: This project was to develop a baseband receiver using TI C64X DSP and Xilinx FPGA. HSC developed the front end receiver algorithms including rake receiver. To test this HSC developed the UT simulator apart from test vectors generated through MATLAB. Finally to meet the requirement of number of users and throughput HSC also incorporated optimizations in FPGA and DSP. Customer Benefits: Provided reusable components for FPGA. System engineers helped with smooth integration HSC provided DSP, FPGA, System, Algorithms so that the customer could treat HSC as a one stop shop and not have to mediate between multiple customers. Read more...
Design and Development of application stack over ARM based vehicle Telematics Control Unit (TCU) for supporting various PASS-6 subscriber, management and diagnostics services Abstract: HSC Designed and Developed the complete of Configuration and Provisioning Unit for next generation TCU Architecture (Gen 2). Since HSC has already worked on the Gen 1 architecture it was also instrumental in effectively porting of software module catering to PASS-6 and management services from TCU Gen 1 to TCU Gen 2. Read more...
Design and development of TOC for Telematics service providers. Abstract: HSC Designed and Developed the features on the existing TOC to facilitate subscriber services and TCU management. The management support was enhanced for Safety and Security Services, Navigation Services, Location Based Services, Remote Diagnostics - Modules Scan and Diagnostics Reporting, TCU Provisioning and Configuration Download, TCU SW Download. Read more...
Design and Design and Development of a Generic TOC which could support for both Legacy TCUs (CDMA Based) and new TCUs (GSM/GPRS Based) Abstract: HSC did a Generic implementation ( including design) of a Transport Protocol Layer at the TOC which would hide technology (CDMA or GSM) specific details and hence enable management of TCUs interfaced to the TOC through varied wireless network interfaces like GSM or CDMA. Read more...
Enhancing IPv4 VSAT to a Dual Mode VSAT (IPv4/IPv6) Abstract: Typically a VSAT has two major interfaces, the LAN side on which it has subtended user networks and the RF Network side. Implementation includes IPv6 Neighbor Discovery and translation algorithms for IPv6-IPv4-IPv6 traffic terminating on the VSAT. This enabled an IPv6 host to access application on VSAT supporting only IPv4. Customer Benefits: Flexibility of subtending IPv4 or IPv6 networks on the LAN side Enable IPv6 interface with minimal changes on the existing software on the VSAT. Read more...
GMR-1 Mobile Satellite System Abstract: The intent was to develop a Gen 2 gateway on a different hardware and a different platform. For this, some parts of the Gen 2 gateway were designed and developed afresh while some were ported on the new platform and some were just modified to support Gen 2 gateway. Read more...
GMR-3G Satellite Terminal Abstract: HSC developed the access stratum including L2/L3 protocols, stack mgmt and PDCP which involved complete system architecture and design. HSC also participated in the integration testing of the Access stratum as well as the NAS-AS integration. Specific handling was done for the voice streams. Read more...
Satellite and Terrestrial Hybrid Network Abstract: HSC developed various key functionalities of the SBSS node viz. Control channel mgmt, control plane and user plane components, RRM/RRC development, inter RAT/inter system handover etc. Various optimizations were done at RRC procedures to minimize the protocol delays. Read more...