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Archive for the ‘WiMAX’ Category

Smart RAN for 4G – Compact-BTS, Metro-Femto & ORI

August 31, 2010 Leave a comment

As we race towards 4G there has been a trend in the radio access network (RAN) architecture of simplifying it, making it more compact and flat. The primary motive has been to enable mobile operators to maintain control on their network costs, while they deal with improving coverage and capacity. However, the explosion in data traffic  volumes, due to smart phones like the iPhone, have thrown a spanner in the works for operators to keep tabs on CAPEX/OPEX costs while they try and keep up with incessantly exploding mobile data demand from burgeoning smart devices, applications, and changing user behavior. This calls for a new architectural paradigm that optimizes existing cell site infrastructure, most of which is macro layer enabled, but at the same time introduces new network layers at the micro-, pico- and femtocell level, that can effectively complement the macro layer.

A new type of base station – the compact BTS along with Femto in the outdoor implementation has also entered the market, further reducing footprint and power consumption, while retaining the performance of macro BTSs. Let us explore these concepts and value proposition that we see for 4G deployment –

  • Compact BTS
  • Metro-Femto
  • ORI – Open Radio Equipment Interface
  • Read more…

Categories: Broadband, Femtocell, LTE, WiMAX Tags: ,

Femtocells – A turning tide!

August 22, 2010 3 comments

Femtocells tide finally seems to be turning – Sprint has announced last week that they will be giving away a new Airvana femtocell product that supports EV-DO, to customers based on the need and eligibility.  The initial version of Sprint’s Airave device, which was made by Samsung, was released in the summer of 2008 and supports only CDMA 1x service. Earlier this spring, AT&T Mobility launched a nationwide femtocell offering, the 3G MicroCell, which it developed with Cisco. Verizon Wireless also has a femtocell that supports CDMA 1x service, called the Network Extender. Only the fourth largest carrier T-Mobile doesn’t to have a Femtocell strategy in place, but they have had UMA (Unlicensed Mobile Access) which did not take off as expected because of lack of Handset vendors commitment.
Read more…

Categories: Broadband, Femtocell, LTE, WiMAX Tags:

Femtocells meet the Enterprise

August 17, 2010 Leave a comment

Femtocells have always intrigued me, why don’t we have more of them? They provide indoor coverage to customers like me, and many advantages to the operator. So why are operators not giving them out for free with a DSL connection like Softbank in Japan? This is the ‘new’ paradigm for indoor coverage, last frontier not conquered by the wireless providers. In the US we have so much fiber underground that most operators can run fiber-to-home (FTH) and put up a Pico cell, albeit the Capex costs. I would think the only thing that is preventing the deluge of femtocells is the pricing, operator initiative and certain other factors like Interference mitigation, etc. Let us explore what they are, how they can be overcome and a balance between performance and efficiency. Read more…

Net neutrality and 4G Networks

August 11, 2010 2 comments

The media is on fire talking about how Google has surrendered the net-neutrality pledge and gone with the carriers, but there are technical reasons how it is the carrier-way or the highway. FCC last year set forth three rules – Providers can’t favor their own content, Providers need to explain variable speeds and Providers cannot limit access to lawful content, which Comcast had it overturned in court. Though FCC might posses the power to make rules on net-neutrality, albeit it is the technologies that control the flow of traffic which will decide how much of content delivery is neutral after all! Read more…

Telecom Space Redefined

August 8, 2010 1 comment

Broadband is re-defining the way technology is being deployed and who is playing a major role. The operators of the yore like – AT&T, Verizon are slowly giving way to spectrum holding partnerships like – Clearwire, Harbinger, etc. Cellular services are getting commoditized and networks of the future will become dumb pipes, through which services instead of just voice and data will be optimally delivered based on tiered pricing and Quality of service. Pay per minute and pay per megabyte will become a delivery mechanism for many operators, as user habits keep changing. Subscribers have become content generators from content consumers with social networking and micro blogging; and with smart phones making a plethora of applications that make use of data pipes similar to PCs, the trend will only keep increasing. Read more…

Categories: 3GPP, Broadband, FCC, IEEE, LTE, WiMAX Tags: , ,

Clearwire Announces New 4G LTE Technology Trials

Clearwire a leading provider of wireless broadband services and operator of the largest 4G network in the country, today announced plans to conduct 4G LTE technology trials expected to yield unmatched wireless speeds in the U.S., and to test multiple coexistence scenarios between LTE and WiMAX radio technologies. The new tests are designed to showcase the unique capability of Clearwire’s unmatched spectrum holdings and examine a variety of potential future technology combinations that could yield additional benefits to consumers and shareholders. Read more…

Categories: 3GPP, FCC, LTE, WiMAX Tags: ,

QOS over 4G Networks

Cellular network operators across the world have seen an explosive growth of mobile broadband usage. Traffic volume per subscriber is increasing daily; in particular, with the introduction of flat-rate tariffs and more advanced mobile devices. Operators are moving from a single-service offering in the packet-switched domain to a multi-service offering by adding Value added services (VAS) that are also provided across the mobile broadband access. Examples of such services are multimedia telephony and mobile-TV. These services have different performance requirements, for example, in terms of required bit rates and packet delays. Solving these performance issues through over-provisioning typically is uneconomical due to the relatively high cost for transmission capacity in cellular access networks which includes radio spectrum and backhaul from the base stations. Read more…

Categories: LTE, WiMAX Tags: ,