IN THIS ISSUE
September 2010
Vol 10 Issue 1

Feature Articles
IMPORTANT NOTICE:
Proposed Rule Changes in the Part 101 Microwave Bands

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Proposed Rule Changes
in the Part 101 Microwave Bands

Dear Licensee,

The Federal Communications Commission recently released a Notice of Proposed Rulemaking (NPRM) and Notice of Inquiry (NOI) in Docket No. WT 10-153 proposing certain rule changes in the Part 101 microwave bands. In the following article, we summarize the main points of the NPRM and NOI and potential impact but there are numerous issues with each of the items discussed. We urge you to read the FCC document and become involved in the Rulemaking proceeding.

The proposed rule changes are significant and one item on authorizing “auxiliary” stations represents the most radical change to the point-to-point fixed bands in the last 30 years. In sum, the NPRM and NOI have the potential to radically change the way that Part 101 point-to-point spectrum is allocated, coordinated and licensed.

Several of the items that are being proposed are complex—particularly the idea of allowing a point-to-multipoint TDD underlay in every fixed frequency band and frequency assignment. If you should have any questions about the proceeding, please do not hesitate to call your regular account representative or customer service at 1-703-726-5500.

Regards,
Chris Hardy
Vice President & General Manager, Comsearch

Important Notice
The FCC released a Notice of Proposed Rulemaking (NPRM) and Notice of Inquiry (NOI) on August 5, 2010 to amend Part 101 of the Commission’s rules dealing with the use of microwave. This item is captioned “Amendment of Part 101 of the Commission’s Rules to Facilitate the Use of Microwave for Wireless Backhaul and Other Uses and to Provide Additional Flexibility to Broadcast Auxiliary Service and Operational Fixed Microwave Licensees” and proposes significant changes to the rules that could impact your current and future microwave deployments. The following is a summary of the key elements found in the NPRM and NOI. We urge you to review the document and participate in the proceeding. Comments in WT Docket No. 10-153 are due October 25, 2010, and reply comments are due November 22, 2010.

NPRM—Permitting “Auxiliary” Fixed Stations
The Commission is seeking comment on a proposal to permit fixed service (FS) licensees to coordinate and deploy multiple links—a primary link and “auxiliary” links. Auxiliary stations would operate on the same frequencies and communicate with the endpoints of a licensed link, presumably using time-division duplexing (TDD). Auxiliary stations would be coordinated and added to the primary link license(s). Auxiliary stations would not be allowed to cause interference to other systems greater than the interference caused by the primary link and licensees with auxiliary stations would only be able to object to interference to the main link. Auxiliary stations would not have to comply with rules on antenna standards, loading, or path length.

Impact: Represents a significant and radical departure from the existing rules by allowing a point-to-multipoint underlay to Part 101 point-to-point licenses. Point-to-point licenses would serve as proxies to enable point-to-multipoint operation while avoiding the necessity of acquiring area-licensed spectrum. This proposal appears to invite predatory tactics such as licensing maximum power and minimally compliant antennas in order to crowd out subsequent users as much as possible. Communication over the main link, while theoretically required to meet the loading requirements, might not be a goal of the operator. Service rules designed to promote sharing among multiple licensees such as power limitations, capacity requirements, and antenna standards could thus be undermined by this concept. Promoting the introduction of TDD systems into bands with established FDD character would be bad spectrum management policy. While the vast majority of comments to a previous request for declaratory ruling (which the FCC dismisses in this item) opposed this concept, the FCC has altered the proposal to some extent and is again asking for public input.

Permitting Greater Sharing Between FS Operations in Certain BAS and CARS Frequencies
The FCC proposes allowing FS operations to share the 7 and 13 GHz spectrum currently allocated exclusively to the Broadcast Auxiliary Service (BAS) and the Cable TV Relay Service (CARS). Balancing this change, the FCC also proposes eliminating the “final link” rule that prohibits broadcasters from using Part 101 FS stations as the final radiofrequency (RF) link in the chain of distribution of program material to broadcast stations.

Impact: Increases the amount of spectrum available to both broadcasters and other FS users through co-equal sharing. Usefulness of 7 and 13 GHz bands under Part 101 for backhaul could be limited by one-way nature of present BAS and CARS usage and sharing with electronic newsgathering (ENG) operations. Broadcasters would face difficulty coordinating temporary mobile ENG operations with Part 101 fixed microwave links should they enter the band. On the other hand without the final link rule, broadcasters could be tempted to use other bands for studio- to-transmitter links (STLs) in order to preserve 7 and 13 GHz for ENG use.

Permitting Adaptive Modulation
Adaptive modulation, also called adaptive coding and modulation (ACM), allows a radio system to change modulation and thus system gain in response to propagation conditions and fading. The system would operate at highest capacity (lowest system gain) under normal conditions and would cycle down to lower capacity (higher system gain) under fading conditions. This approach allows the link to remain connected through deeper fades at the cost of reduced capacity. Because the link capacity changes over time, ACM is suited for IP radio links but not TDM links. The Part 101 rules contain a minimum payload capacity rule intended to ensure that FS links are operated efficiently. The proposal would allow temporary operations below the minimum capacity under certain circumstances (times of “anomalous signal fading”), which will enable FS links—particularly long links in rural areas—to maintain critical communications.

Impact: Outright abuse of the minimum payload rule is possible if a link is designed solely to operate at a sub-compliant modulation and without regard for the performance of higher-order compliant modulations. A more likely scenario is that ACM can potentially enable use of smaller and lower performance antennas. If this is permitted and becomes widespread it could lead to reduced spectral efficiency and re-use. A more specific limitation than times of “anomalous signal fading” may be required to guard against abuse and inefficiency.

NOI—Modification of Efficiency Standards in Rural Areas
The Commission seeks comment on whether lowering the current efficiency standards in rural areas would lower costs associated with providing backhaul service and whether this is a beneficial tradeoff. The suggested definition of “rural areas” is counties with 100 persons per square mile or less.

Impact: Reducing the bits-per-hertz efficiency of a radio system increases system gain potentially allowing greater path length, lower transmitter power, or smaller antennas. On the other hand less information is transmitted so the spectrum is not used as efficiently. A definition of rural areas based only on population or similar factors will not address the fact that some highly congested microwave sites are located in remote areas. It appears a proper definition must take into account existing microwave usage as well as population.

Review of Part 101 Antenna Standards
The Commission seeks comment on whether to review the antenna standards in any particular band to allow smaller antennas, to identify opportunities to facilitate increased deployment of FS facilities without subjecting other licensees to increased interference.

Impact: This is another tradeoff of size and cost versus spectrum efficiency. The rules were previously revised to allow 2' diameter antennas in the 10 GHz band and in the 11 GHz band under certain conditions. We have argued previously that the increased beamwidth is not a critical factor to interference as compared to sidelobe suppression and front-to-back ratio, particularly if use of smaller antennas is accompanied by corresponding reduction of station EIRP. We anticipate the same arguments can be applied to 18 GHz (reduce requirement to allow 1' diameter antennas), 23 GHz (reduce to sub 1' diameter) and possibly 6 GHz (reduce to 4' ultra high performance). It is not possible to go arbitrarily low on antenna size or sidelobe and backlobe performance would be degraded too severely. In addition the FCC needs to fix existing rule language on upgrade requirements for 2' antennas at 11 GHz. For the most part, the FCC’s Part 101 antenna standards (A&B) are decades old and may not accurately represent state-of-the-art technology. On the other hand, the antenna standards published by the European Telecommunications Standards Institute (ETSI) are updated based on recent advances. Adopting these or similar standards could bring the requirements in line with the state ot the art while also aiming towards harmonization with an international standard.

General Review of Rules
The Commission seeks comment on whether to examine any additional modifications to the Part 101 rules, or other policies or regulations, to promote flexible, efficient and cost-effective provisions of wireless backhaul service.

Impact: This is a broad opportunity to bring up any rule changes you would like to see without having to file a rulemaking petition. Don't miss out!


Return to top.

The AWS Band
—Four Years Later, Where Are We Now?

by Rhett Butler
Project Manager, Comsearch

In the summer of 2006, the Federal Communications Commission (FCC) auctioned off 90 MHz of spectrum in the 2.1 and 1.7 GHz bands for 3G and 4G services. The final stats go like this: 168 qualified bidders, 161 rounds, 13.9 billion dollars, 104 winners with a total of 1087 licenses.

Even with minimal FCC build-out requirements, some auction winners have gone full steam ahead and are deploying whole networks on the AWS spectrum. These licensees have put forth considerable resources to accomplish these network build-outs. All of these licensees faced a similar challenge—relocating incumbent Fixed Microwave and Broadband Radio Service (BRS) systems in the 2.1 GHz band and dealing with incumbent Federal Government systems in the 1.7 GHz band.

1.7 GHz Band
The 1710–1755 MHz band initially consisted of 2,240 frequency assignments used by close to a dozen different Federal Agencies to support fixed microwave, transportable (or temporary fixed) systems, and both land and aeronautical mobile systems.

As of October 2009 (the latest official NTIA report), there are 847 systems remaining. Four of the 12 agencies, HUD, Treasury, DOJ and USPS, have relocated all of their systems from the band. NTIA reports that 579 of the remaining 847 systems will be relocated by end of 2012, with the remaining 268 systems due for relocated by the end of 2013. All efforts to relocate these government systems are taken on by the respective agencies, and for the most part, are on a definitive time schedule for replacement.

It is important to note that the Department of Defense has a few protected sites that could remain indefinitely.

2.1 GHz Band
At the conclusion of the AWS auction, Common Carriers and Private Industry (including state and local governments) operated approximately 5,700 fixed microwave paths in the 2110–2150 MHz band. Today, that number is closer to 2,000.

In four years, 65% of fixed microwave paths have either been relocated to different frequency bands or have been decommissioned. This is no insignificant feat. Preparing to launch a mobile AWS market requires considerable planning, money and time from conception to launch. Relocation of incumbent systems is just one aspect but a critical one. The relocation process generally starts several months to years before the launch date and includes the following activities.

Spectrum Sharing Analysis
This is where 2.1 GHz victim links are identified. Analysis of potential interference is performed through specialized software tools that input parameters of a proposed network and predict any potential interference cases. Once potential victim links are identified, a licensee can adjust the input site parameters to reduce the potential number of victim links. Sometimes, adjustments to parameters of the network such as transmit power, antenna azimuth, antenna down-tilt, and site count can possibly eliminate some or all victims. This is a balancing act for the operator as there is a fine line between desired network performance and having to relocate multiple incumbent microwave links, which can be a large outlay of money and can take precious time to perform.

An analysis of known fixed 1.7 GHz microwave systems is generally performed at the same time. However, it is required to submit system parameters and interfernece analysis resuts to most government agencies so they may approve the operation of any network. For Classified DoD systems, licensees submit only system parameters, and the DoD conducts the analysis themselves and provides the results through an internet portal.



Incumbent Link Assessment
Once the market design is finalized and then analyzed, a list of potential victim links can be identified. Each of these links is normally assessed for actual operational parameters, which helps to determine an estimated replacement cost and time frame for system decommissioning. This may include contacting the incumbent directly to determine the operational status, traffic used on the microwave link, equipment used, and any additional information concerning site/tower conditions.

Once all victims have been assessed, a cost estimate can be prepared for each victim link. This will let the AWS operator know the potential overall costs to relocate all victim links. In many cases, AWS relocators perform site visits before proceeding with the negotiations to verify the incumbent links and information provided.

Incumbent Negotiations
A general rule in the negotiation process is that it will take anywhere from six months to one year to relocate a 2.1 GHz microwave system from start of negotiations to complete system relocation. This time period normally accounts for agreement on settlement cost/type, contract language revisions, new equipment procurement, installation/cutover, old system removal, and license updating. Negotiations with reluctant incumbent licensees can increase this time period significantly.

Cost Sharing
After signing a contract with an incumbent the AWS licensee will have 30 days to register the relocation with one of the AWS clearinghouses. If another AWS licensee builds in the area of the registered links they may cause a trigger, which would result in a cost-sharing obligation.

Prior Coordination Notification
Prior Coordination Notification (PCN) for AWS operators requires notifying operators in two separate bands. These notifications are performed separately and not necessarily at the same time.

1.7 GHz PCN is recommended to be started as soon as the design is pretty firm. The reason is there are many federal agencies that must be notified, and they have a 60 day response time. DoD has several classified systems and will not reveal any details. In these cases, DoD will need to give clearance to operate. Often the requested network is rejected and it may require re-submittal of multiple new designs in order to have one approved. 2.1 GHz PCN is very similar to the PCN process used for fixed microwave. Generally once incumbent victim links (identified in the analysis) have been relocated, there should be no issues. Exceptions are for the AWS A and F Blocks. AWS A block licensees must coordinate/notify BAS operators in the frequency band directly adjacent. AWS F Block licensees must coordinate/notify BRS operators in frequency band directly adjacent.

Conclusion
There are quite a bit of planning and resources required to clear spectrum in order to launch mobile market on AWS frequencies. While many incumbent 2.1 GHz links have been relocated, there still remain a considerable number of operating incumbents. Many more of these systems will have to be cleared before the intent of Auction #66, to provide Advance Wireless Services to a majority of the population in the United States, can be fully realized.

Comsearch has performed these spectrum clearing and relocation services for many AWS licensees and is recognized as an industry expert in all areas of the AWS relocation process.

Amendment of Part 101 Rules—Several proposed Part 101 rule changes by the FCC. These include expanding cross service sharing in the 13 GHz band, elimination of the “Final Link” rule for broadcasters, allowing adaptive modulation radios to operate paths for short periods of time below the minimum capacity requirements, and allowing point to multi-point operation in the Fixed Point-to-Point Microwave bands through the use of “auxiliary stations.” FCC-10-146A1.pdf

23 GHz Band—Two additional channels added to channel pairs that are allowed conditional authorization. FCC-10-109A1.pdf

6525–6875 MHz Band—30 MHz channels approved for conditional authorization. FCC-10-109A1.pdf

3650–3700 MHz Radio Service—Update July 31, 2010—1,421 Nationwide Licenses have been granted for this service. 373 companies with nationwide licenses have filed deployment details for a total of 6,414 sites. The FCC information site for this service can be found here: 3650-3700 Radio Service Details.

National Broadband Plan—Plan calls for actions to connect 100 million households, provide affordable access for all Americans, promote competition, enhance the safety network, and several other goals to reach over the next 10 years. The entire plan can be seen here: national-broadband-plan.pdf. The FCC also created a web site for additional information: www.broadband.gov.

Broadband Deployment Report—Report finds 14 to 24 million Americans do not have access to broadband (Dkt No 09-137 & 09-51, FCC No 10-129). DOC-299989A1.pdf FCC-10-129A1.pdf FCC-10-129A2.pdf FCC-10-129A3.pdf FCC-10-129A4.pdf FCC-10-129A5.pdf FCC-10-129A6.pdf

Legal Framework for Broadband Internet Access—FCC initiates a public process to consider the adequacy of the current legal framework used to promote investment and innovation in Broadband Internet Service (Dkt No 10-127, FCC No 10-114). FCC-10-114A1.pdf FCC-10-114A2.pdf FCC-10-114A3.pdf FCC-10-114A4.pdf FCC-10-114A5.pdf FCC-10-114A6.pdf

Public Safety Nationwide Interoperable Broadband Network—FCC white paper provides the capacity analysis behind the National Broadband Plan recommendations for the deployment and operation of a nationwide 4G wireless public safety network. DOC-298799A1.pdf

Digital Broadcast Television Field Strength—Proposed FCC rules to implement the Satellite Television Extension & Localism Act of 2010 (Dkt No 06-94 & 10-152, FCC No 10-133). FCC-10-133A1.pdf

Rural Health Care Broadband Support—New health care connectivity program proposed to expand investment in broadband for medically underserved communities (Dkt No 02-60, FCC No 10-125). FCC-10-125A1.pdf FCC-10-125A2.pdf FCC-10-125A3.pdf FCC-10-125A4.pdf FCC-10-125A5.pdf FCC-10-125A6.pdf DA-10-1454A1.pdf

2012 World Radiocommunication Conference—Recommendations of the advisory panel (DA No 10-1408, Dkt No 04-286). DA-10-1408A2.pdf DA-10-1408A3.pdf DA-10-1408A1.pdf

Consumer Help Web Site—Consumer help site launched to provide “One-Stop Shopping” for consumers with regard to FCC issues. DOC-300333A1.pdf

FCC Grants Extension to Globalstar for Suspending Certain Terrestrial Operations
The International Bureau of the FCC granted an extension to Globalstar Licensee LLC (Globalstar) on the deadline to suspend certain terrestrial operations authorized in the Globalstar WiMAX ATC Order to September 15, 2010. The Globalstar WiMAX ATC Order concluded that Globalstar’s proposed Ancillary Terrestrial Component (ATC), to be operated by Open Range Communications under a spectrum leasing arrangement, did not comply with ATC “gating criteria.” The Commission granted a waiver of the gating criteria, however, conditioned on Globalstar taking actions necessary to come into compliance by certain dates, or suspend operations. The first such date was July 1, 2010, by which Globalstar was to have launched new satellites necessary to meet certain of the gating criteria. On December 14, 2009, Globalstar filed a request seeking to extend compliance deadlines by 16 months. The application was placed on public notice on March 5, 2010, and is the subject of a Motion to Hold in Abeyance and Petition to Deny filed by Iridium Satellite LLC.
http://www.fcc.gov/Daily_Releases/Daily_Business/2010/db0729/DA-10-1418A1.doc

LightSquared Delay in Launch of Satellite
LightSquared (formerly SkyTerra Communications) is an integrated wireless broadband and satellite network provider, that plans to offer satellite-only, terrestrial-only, or integrated satellite-terrestrial services to their end users. LightSquared announced that the launch of the Company’s $400 million satellite has been delayed, due to a glitch of a technical nature. Boeing, the satellite manufacturer, notified LightSquared of this challenge for the SkyTerra 1 satellite’s launch date—formerly set for August 16th, this date has now been moved to either the end of this year or early next year.

LightSquared/SkyTerra Subsidiary LLC (“SkyTerra”) Application for Modification Authority for an Ancillary Terrestrial Component
FCC modifies licenses held by LightSquared/SkyTerra Subsidiary LLC (“SkyTerra”) to revise the terms and conditions applicable to operation of Ancillary Terrestrial Component (“ATC”) stations. The ATC stations will use L-Band spectrum that SkyTerra currently uses for provision of Mobile Satellite Service (“MSS”). This action will afford additional flexibility for the technical design of SkyTerra’s ATC network, enabling SkyTerra to operate with greater capacity and improved spectrum efficiency.

SkyTerra is the licensed operator of MSAT-2 (formerly known as AMSC-1), a geostationary satellite at the 101.3° W.L. orbital location. MSAT-2 has been used for provision of 1.5/1.6 GHz L-Band MSS in the United States since 1996. SkyTerra has a license to launch and operate a satellite, SkyTerra-1, at the same orbital location, to replace MSAT-2. SkyTerra also holds a blanket license for operation in the United States of MSS mobile terminals that communicate via MSAT-1, a Canadian-licensed geostationary satellite operated by SkyTerra’s affiliate, SkyTerra (Canada) Inc. “SkyTerra Canada”). SkyTerra has a license for fixed Ku-band earth stations in Virginia to provide feeder links and TT&C transmissions for MSAT-2. It also has licenses for new Ku-band earth stations in Texas and California that will provide feeder links and telemetry, telecommand, and control for SkyTerra-1 and the replacement satellite for MSAT-1.
http://hraunfoss.fcc.gov/edocs_public/attachmatch/DA-10-534A1.pdf

FCC Grants DISH Network’s application for authority to construct, launch, and operate a new Direct Broadcast Satellite Service satellite, EchoStar 14, at the 118.9 W.L. orbital location
FCC grants DISH Operating L.L.C.’s (DISH) application for authority to construct, launch, and operate a new Direct Broadcast Satellite (DBS) Service satellite, EchoStar 14 (Call Sign S2790), at the 118.9° W.L. orbital location. This will authorize DISH to operate the EchoStar 14 satellite using DBS channels 1-21. The EchoStar 14 satellite will be co-located with the EchoStar 7 satellite at the nominal 119° W.L. orbital location and will increase DISH’s capacity to provide high definition and local-into-local programming, thereby providing consumers with more programming choices.
http://www.fcc.gov/Daily_Releases/Daily_Business/2010/db0310/DA-10-407A1.doc

FCC Establishes procedures for issuing ALSAT licenses to earth stations operating in the Ka-band
FCC established procedures for issuing ALSAT licenses to earth stations operating in the Ka-band. This puts in place a procedure for placing non-U.S.-licensed space stations operating in the Ka-band on a “Permitted List.” This procedure is similar to the procedure used since 2003 to place non-U.S.-licensed space stations operating in the conventional C-band and Ku-band on a Permitted List for those frequency bands. The new procedure will allow earth stations with “routine” Ka-band antennas to communicate with all U.S.-licensed satellites and with those non-U.S.-licensed satellites on the Ka-band Permitted List without additional regulatory approval.
http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-20A1.doc

GreenPCN—What is it?
www.greenpcn.com
Where did all the mail go? The U.S. Postal Service predicts that mail volume is projected to fall from 177 billion in 2009 to 150 billion in 2020. While this may not be encouraging news for the Post Office, this trend represents an ongoing paradigm shift for consumers and business alike in the digital age as we focus more on environmental and economic considerations.

For those of you that receive their Prior Coordination Notices (PCNs) from Comsearch through the U.S. Postal Service, you may have noticed by now that we have taken a quantum leap in our delivery method. The days of delivering page after page of technical data via snail mail have been replaced with a simpler, more efficient method of sending a postcard. That’s right…a postcard!

The postcard contains critical information such as the job number, response due date and the nature of the PCN (New/Major, Minor or Renewal). Also, our new web site, www.GreenPCN.com, is shown on the postcard where you can view, download and print (if you choose to) the technical data.

Viewing your PCN data is as simple as going to the GreenPCN web site and typing in the eight character access code. PCN data can be retrieved for 45 days before the access code is deactivated. The web site also contains a short form for those recipients of PCNs that would like to receive the PCNs solely by email.

GreenPCN is just one of several “Green” initiatives that Comsearch has implemented over the past decade. We hope the recipients of GreenPCN (many of which are Comsearch customers) will view the dual benefit of conserving the environment and watching costs as a progressive move to the future for all involved.

Comsearch is very excited about GreenPCN and invites your feedback. You can send your comments at anytime to customersupport@comsearch.com.

WCAI’s 16th Annual International Symposium
—Co-Located with 4G World
Date: October 18–21, 2010
Location: McCormick Place, Chicago, IL
Panelist: Chris Hardy, Vice President & General Manager, Comsearch

Comsearch’s Chris Hardy will join a panel on Monday, October 18 at 10:00am about Operator Coordination Strategies in the “Restricted” Band. “Restricted” contention based protocols are capable of avoiding interference only to other co-frequency devices using the same protocol (e.g. WiMAX). Avoiding interference requires that both operators coordinate to employ synchronization and other interference mitigation techniques. Coordination with satellite earth station operators and across borders must also be considered. This session discusses best practices to avoid interference in the restricted portion of the 3.65 GHz band.

Comsearch Launches Suite of Services for Microwave Backhaul
As wireless operators upgrade their microwave backhaul networks to keep up with increasing demands for capacity, Comsearch has launched a new suite of support services aimed at reducing operators’ capital and operating expenditures and speeding network deployment.

Comsearch’s iQ·link® Services suite includes four offerings that provide network engineering analysis as well as software database and system maintenance to enable network planners to roll out high capacity backhaul networks quickly and efficiently. These services allow network planners to focus on their core expertise by off-loading other time-consuming tasks.

• Network Upgrade Analysis—Operators considering a capacity upgrade of their backhaul network can use this service to quickly determine the impact on spectrum requirements, equipment upgrades, and more.
• Equipment and Network Audit—Wireless network designers can utilize this service to increase planning efficiency and eliminate costly mistakes related to the use of outdated or incorrect equipment specifications and network data. Following the audit, Comsearch engineers evaluate the impact on entire network interference, spectrum usage, and more.
• Database Maintenance—All iQ·link users can now tap Comsearch engineers to manage tedious and time-consuming tasks such as importing radio and antenna data, verifying specifications with the manufacturers, checking network integrity, creating custom reports, managing bulk parameter changes, and more.
• Server Maintenance—All iQ·link users can now completely off-load a variety of essential tasks in managing the computer hardware such as installing iQ·link upgrades, applying operating system and security patches, managing critical data backups, making hardware upgrades, and more.

Comsearch is the Official Spectrum Manager
for CTIA Enterprise & Applications 2010
Date: October 5–8, 2010
Location: Moscone Center West, San Francisco, CA

CTIA has rebranded its fall show to CTIA Enterprise & Applications™ to reflect the evolution of the industry and growing use of mobile technology in business. Building on the success of the show’s legacy, the event will demonstrate the increasing benefits of wireless data in enterprise and the expanding market for applications and content.

CTIA launched its fall show fifteen years ago to drive wireless data deployment within the enterprise and consumer markets. Today, the mobile business evolution is well underway. Discover how the exhibit floor, educational sessions and partner events will equip you to learn, network and compete in this increasingly mobile marketplace.

Comsearch Software Now Offers Comprehensive Support For Adaptive Modulation in Microwave Backhaul Planning
Comsearch has evolved its iQ·link®XG microwave network planning software into Version 9.1, offering a more comprehensive solution for planning wireless networks using adaptive modulation microwave radios.

With iQ·linkXG 9.1, wireless network planners can easily design and deploy adaptive modulation radios, which are able to automatically adjust the capacity and modulation according to the quality and performance of the radio channel. This offers operators the ability to achieve maximum throughput during clear sky conditions, while maintaining a robust, high-priority voice channel during periods of fading.

The benefits of iQ·linkXG 9.1 include:

• Easy import of adaptive modulation radios and their numerous modulation-specific parameters through the use of a simple and flexible import format.
• Comprehensive calculation of link availability and performance for all modulations.
• Highly customizable link designs with voice and data analysis.
• Detailed interference analysis and the ability to automatically determine worst-case modulation combinations.
• Full implementation of adaptive modulation radios with Automatic Transmit Power Control (ATPC).
• Full consideration of adaptive modulation power adjust and power boost as well as modulation downshift and upshift offsets.

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