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Leaked: iPhone firmware confirms GPS

Don't you just love the weekend before a Stevenote? It's the time when the finger comes out of the dyke and leaks become a flood, then a monsoon. This time Engadget has the skinny. They got a peek inside the iPhone 3G firmware and it shares a...

Tags: Apple iPhone, UMTS, HSDPA, Firmware, GPS, Cellular Phones, Consumer Electronics, Personal Technology, Jason D. O\'Grady

Blog posts 2008-06-07

Today's Debate: Ban cell phones from hospitals?

I was wondering why Dr. Sanjay Gupta was waving his phone in my face this morning as I sweated to the oldies at my local YMCA.Here's why. A Dutch study shows radiation from data-enabled cell phones can interfere with critical hospital equipment from as far away as 3 meters -- that's...

Tags: Cellular phones, U.S. Here, Dana Blankenhorn, data phone, phone, GPRS, UMTS, cell phone, hospital

Blog posts 2007-09-06

Cisco Offers IP RAN Optimization Congestion Management for GSM and UMTS

The Cisco IP RAN Optimization solution introduces IP to the RAN network that has traditionally been TDM. Cellular providers have been using TDM based networks to backhaul the traffic from the cell site to the Mobile Telephone Switching Office MTSO since deploying their networks for the first time. The first...

Tags: UMTS, IP, Cisco Systems Inc., GSM, Cisco IP RAN Optimization Solution

White papers 2007-07-01

Cross-Layer Interaction Between TCP and UMTS RRM Scheduling Strategies

In the third generation wireless system UMTS, Radio Resource Management RRM functions should encompass scheduling algorithms. In particular, scheduling mechanisms play a key role in resource allocation for UMTS shared channels. These shared channels are mostly used in UMTS to support services such as web browsing and e-mail that work...

Tags: Strategy, UMTS, Radio, TCP, Tcp/Ip, Cellular Phones, Networking, Consumer Electronics, Personal Technology

White papers 2007-06-03

UMTS Femtocell as Wireless Residential Gateway

Mobile operators today are trying hard to overcome the challenges posed by intense competition in the wireless communication space. There is an ever-increasing demand from operators to increase ARPU while decreasing cost. New competitors entering the market are posing a big threat to existing players apart from the alternative technologies...

Tags: UMTS, Gateway Inc., Mobile, Advertising & Promotion, 3G, Cellular Phones, Wi-Fi, Wireless, Marketing, Consumer Electronics, Personal Technology

White papers 2007-06-01

UMTS/HSDPA Backhaul Bandwidth Dimensioning

This paper presents a simulation-aided approach for the dimensioning of the ATM-based iub interface in UMTS/HSDPA networks. Besides considering different user applications, as well as the peculiarities of the radio protocols above and within the backhaul transport infrastructure to estimate Iub utilization, this paper also provides insights in to the...

Tags: UMTS, HSDPA, Bandwidth, Radio, Cellular Phones, Advertising & Promotion, Consumer Electronics, Personal Technology, Marketing

White papers 2007-05-18

What may sink the iPhone

What may sink the iPhoneIt does not.The current, first gen iPhone doesn not support UMTS. Not even where available.3G and EDGECorrect me if I'm wring, but isn't edge just a cheap upgrade to GPRS until UMTS can be deployed. I think that AT&T/Cingular have been upgrading their networks...

Tags: Cellular phones, Telecom & Utilities, phone, 3G, Cingular Wireless, Apple iPhone, SIM card, UMTS, cell phone user, cell phone

Discussion threads 2007-01-10

Performance of TCP and HTTP Proxies in UMTS Networks

It is well known that the large round trip time and the highly variable delay in a cellular network may degrade the performance of TCP. Many concepts have been proposed to improve this situation, including Performance Enhancing Proxies PEP. One important class of PEPs are split connection proxies, which terminate...

Tags: UMTS, HTTP, Performance, TCP, Tcp/Ip, Performance Management, Networking, Human Resources, Workforce Management

White papers 2007-01-01

Performance of Different Proxy Concepts in UMTS Networks

It is well known that the large round trip time and the highly variable delay in a cellular network may degrade the performance of TCP. Many concepts have been proposed to improve this situation, including Performance Enhancing Proxies PEPs. One important class of PEPs are split connection proxies, which terminate...

Tags: UMTS, Performance, TCP, Connection, Performance Management, Tcp/Ip, Networking, Human Resources, Workforce Management

White papers 2007-01-01

A Simulation Study of TCP Performance Over UMTS Downlink

Data transfer on the UMTS downlink can be done either through Dedicated Channels DCH or shared channel FACH. The data transfers on the DCHs can receive very high throughputs. However, a setup time of the order of 250ms is required before data transfer can begin on the DCH. For very...

Tags: Channel, UMTS, France Telecom, TCP, Cellular Phones, Tcp/Ip, Consumer Electronics, Personal Technology, Networking

White papers 2007-01-01

Testing a Radio Network Controller in UMTS Infrastructure

The company wanted to test a Radio Network Controller RNC in a UMTS infrastructure using Catapult DCT-2000 and quick ramp-up of the geographically diversified Aricent team on the customer's test bed/configuration and Catapult DCT-2000. The challenge was to set up an extensive testing laboratory at the customer's location. With its...

Tags: UMTS, Network, Radio, Cellular Phones, Networking, Consumer Electronics, Personal Technology

Case studies 2006-10-26

UMTS Radio Network Controller Node Development

The company wanted to quickly ramp up the Aricent team on the customer's products to study and migrate the project from the customer's multiple international locations and develop a Radio Network Controller RNC node and testing tools to test its various components. The challenge was to develop the Traffic Processing...

Tags: UMTS, Radio, Advertising & Promotion, Marketing

Case studies 2006-10-25

The Time Division Duplex: Mode in the UMTS

The 3rd Generation Partnership Project (3GPP) is a standardization body for 3G mobile radio systems, also known as the Universal Mobile Telecommunication System UMTS. Established in December 1998, the 3GPP is a collaborative agreement, bringing together several telecommunication standards bodies. The UMTS, as defined by the 3GPP, is based on...

Tags: UMTS, 3GPP, Radio, RNS, Advertising & Promotion, Cellular Phones, Wireless, Marketing, Consumer Electronics, Personal Technology

White papers 2006-10-01

Palm, Microsoft, and Vodafone announce UMTS Treo is coming in 2006

Palm, Microsoft, and Vodafone announce UMTS Treo is coming in 2006GSM -- Not switching!Hi there, I wanted to follow up on your question about what data-speed hungry GSM users are doing. I looked into EVDO but I had to face the cold hard truth that, like you, I am...

Tags: Cellular phones, GSM Phones, Microsoft Corp., GSM, UMTS Treo, dotMobi, UMTS, phone, Palm Inc., Vodafone Group Plc.

Discussion threads 2006-07-14

Palm, Microsoft, and Vodafone announce UMTS Treo is coming in 2006

Palm, Microsoft, and Vodafone announced an upcoming Windows Mobile Treo for release in Europe before the end of 2006. GSM subscribers in the U.S. have been waiting patiently for Verizon Wireless' exclusive deal for the Treo 700w to end so they can get their hands on a Windows Mobile...

Tags: palmOne Inc., Lennon, UMTS

Blog posts 2006-07-14

Impact of UMTS Load Control Mechanisms on TCP

Radio Resource Management RRM algorithms are responsible for efficient utilisation of the air interface resources in UMTS networks. Network load control is one important task of the RRM functionality aimed at ensuring system stability around the targeted network load defined by the radio network planning. A common load control action...

Tags: UMTS, Network, Radio, TCP, Tcp/Ip, Cellular Phones, Networking, Consumer Electronics, Personal Technology

White papers 2006-06-01

Nonlinear Complex Behaviour of TCP in UMTS Networks and Performance Analysis

This paper presents a study of nonlinear complex behaviour in UMTS networks. Using the fundamentals of chaos theory the paper explores the chaotic nature of the TCP protocol when used in 3G UMTS mobile networks. Furthermore the paper evaluates the impact of nonlinear dynamic behaviour on the UMTS network performance....

Tags: UMTS, Performance, Network, TCP, Cellular Phones, Tcp/Ip, Networking, Consumer Electronics, Personal Technology

White papers 2006-05-12

Coexistence Analysis of Bluetooth and Cellular UMTS in the 2500-2690 MHz Band

The 2500-2690 MHz band has been identified as extension band for IMT-2000 systems such as UMTS Universal Mobile Telecommunications System. The 2.4 GHz ISM (Industrial, Scientific, and Medical) band is available for all kinds of unlicensed technologies such as BlueTooth BT and Wireless LAN WLAN. The combination of BT and...

Tags: UMTS, British Telecommunications, Bluetooth, Analysis, Cellular Phones, Consumer Electronics, Personal Technology

White papers 2006-05-02

Performance Evaluation of TCP Congestion Control Algorithms Over UMTS

TCP congestion control was designed and optimized for wired networks. During recent years, however, the popularity of wireless network infrastructures enabling ubiquitous Internet access, such as Universal Mobile Telecommunication System UMTS, has grown considerably. As a consequence, many improved TCP congestion control algorithms, able to effectively operate over hybrid wired/wireless...

Tags: Algorithm, UMTS, Performance, Network, Congestion, Performance Evaluation, TCP, Tcp/Ip, Networking, Wireless

White papers 2006-03-02

TCP Performance Enhancement Over UMTS Network With RNC Feedback

TCP optimization for wireless networks to deal with packet losses due to fading, shadowing and contention should preferably maintain TCP end-to-end semantics with minimal dependence on intermediate nodes. The development of advanced 3G networks and services makes it necessary to find a way of improving TCP's efficiency and resource utilization....

Tags: UMTS, Network, TCP, Tcp/Ip, Networking

White papers 2006-02-15