First batch of Bluetooth EDR testing gear arrives; TEST & MEASUREMENT
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`Telecom Asia
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`March 1, 2006
`
`Copyright 2006 Gale Group, Inc.
`All Rights Reserved
`ASAP
`Copyright 2006 Questex Media Group, Inc.
`
`Section: Pg. 28(4); Vol. 17; No. 3; ISSN: 1681-181X
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`Length: 2134 words
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`Byline: Everett, Chris
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`Body
`
` With the "need for speed" the Bluetooth SIG developed version 2.0+EDR of the Bluetooth standard, with
`"EDR" signifying Extended Data Rate. For Bluetooth devices, EDR means an increase in the maximum data rate
`from 1 MHz to 3 MHz. To make that happen, two new modulation schemes were implemented in the Bluetooth
`standard. Consequently, Bluetooth test equipment needs to be updated to meet the additional
`testingrequirements.
`
` "The motivation behind 2.0+EDR was to improve existing usage scenarios that require increased data
`throughput, like streaming CD-quality audio, digital image transfer and laser printing," said Michael
`Foley, executive director of the Bluetooth SIG. Earlier versions of the Bluetooth Core Standard have a
`maximum data rate of 1 MHz. Version 2.0+EDR pushes that to 3 MHz by implementing two new modulation
`schemesin the payload section of the Bluetooth packet.
`
` Earlier versions of the standard use a Gaussian-frequency-shift-keying (GFSK) modulation scheme across
`the packet. The result is a peakdata rate of 1 Mbps. The trick in increasing the data rate in v2.0+EDR is
`to change the modulation scheme part way through when transmitting a packet. Specifically, v2.0+EDR
`changes from using GFSK at the beginning of the packet to a phase-shift-keying (PSK) technique when
`transmitting the payload section. The benefit is increased data rates while maintaining backward
`compatibility to earlier versions of the Bluetooth standard.
`
` Of the two new modulation schemes, the p/4-DQPSK modulation schemeis mandatory in any v2.0+EDR
`compliant device. This is the scheme that provides a peak data rate of 2 MHz. The 8DPSK modulation scheme
`isoptional. However, it is the scheme needed for a Bluetooth device toprovide 3 MHz.
`
` In either case, Bluetooth test equipment needs to be updated to test devices to the v2.0+EDR
`specifications. But currently there are not yet many test equipment options available.
`
` For example, Frontline touts its FTS4BT Bluetooth protocol analyzer and packet sniffer as the
`"World's only Bluetooth v2.0+EDR analyzer." The FTS4BT can be used throughout the design-to-qualification
`cycle by product developers and test engineers. The analyzer works in real time to capture, decode
`and display data, while detecting protocol errors.
` Protocol level testing
` The Bluetooth SIG has selected Frontline to provide worldwide technical support for the SIG's Profile
`Tuning System (PTS) test tool. The PTS is part of Bluetooth's new qualification program and serves as
`a reference test system for Bluetooth profiles and protocols. Ideally, PTS will help make it easier
`for members in debugging, testing and certifying their Bluetooth devices while in general improving the
`interoperability of Bluetooth devices in the market.
`
` For product developers and test engineers designing and testing Bluetooth v2.0+EDR hardware, there are
`now several new pieces of test gear available. Earlier this year Anritsu updated its MT8852 series
`ofBluetooth test equipment with the MT9952B--the first test instrumentwith both EDR and Adaptive Frequency
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`First batch of Bluetooth EDR testing gear arrives; TEST & MEASUREMENT
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`Hopping testing capability. (Adaptive Frequency Hopping was one of the major and mandatory changes
`implemented in v1.2 because of interference problems occurring betweenBluetooth and 802.11b/g WLAN. Both
`share some of the same frequency range, and Adaptive Frequency Hopping helps Bluetooth devices avoid those
`shared frequencies.)
`
` The MT8852B includes a p4-DQPSK and 8DPSK signal generator and modulation analyzer for directly
`handling six of the eight EDR transmitter and receiver test cases. Each measurement can be run exactly in
`accordance with the v2.0+EDR specification for product validation during the product design cycle, or
`the MT8852B's test program can be edited to reduce test time in production environments. The model has a
`typical test time of less than 10 seconds for new EDR devices. All measurements are performed in the test
`mode, including RF loopback.
` The loopback test mode is where a Bluetooth device--the slave--is asked to decode the packets sent by
`the test system and send back thepayload using the same packet type. The bit-error-rate test requiressuch
`loopback capability.
`
` Agilent Technologies is adding EDR loopback testing capabilities to its N4010A wireless connectivity
`test set. The N4010A with Option 105 could be used for EDR connectivity testing during the
`development,integration and manufacturing of chipsets and devices. The RF test cases called out in
`Bluetooth's test specifications (TSS/TP) allow provisional testing of Bluetooth devices under non-loop
`back operation. This may be useful during the early stages of radio development.
`
` Four of the new EDR test cases are specific to transmitters: relative transmit power, carrier frequency
`stability and modulation accuracy, differential phase encoding, and inband spurious emissions. Four other
`new test cases are specific to receivers: sensitivity, bit error rate (BER) floor performance, C/I
`performance and maximum input level. Now, with the addition of Option 107, the N4010A can support loopback
`testing with six EDR test cases built-in to the test set. The 107 option will be available to order in
`March.
`
` Actually, Rohde and Schwarz claims that its R&S CBT and CBT32 testers outfitted with their Bluetooth
`v2.0+EDR option are the first to successfully provide loopback testing. Fitted with the EDR option, theR&S
`CBT and CBT32 can perform seven of the eight test measurements without any external equipment or PCs. And
`they can be performed quickly. For example, it takes the R&S CBT only five seconds to measure four 2-DH5
`and four 3-DH5 packets on three RF channels. During this time the R&S CBT calculates all the
`measurement results for the "EDR Carrier Frequency Stability and Modulation Accuracy" test case and the
`"EDR Relative Transmit Power" test case--two of the four new transmitter tests.
`
` In addition to providing a loopback testing capability for EDR receiver measurements, the R&S CBT also
`includes a new "dirty transmitter" dealing out ERD packets for receiver sensitivity measurements.
`Thetransmitter sends dirty packets to the receiver. These dirty packetshave frequency offsets in the
`transmitted carrier as well as symbol timing errors. On top of that, the transmitter adds a frequency
`drifton its output signal, which varies by 180 degrees from packet to packet. After a minimum of 16
`million bits of data has been received, the BER is then calculated by comparing the received data to
`the transmitted data. The Bluetooth v2.0+EDR option can now be ordered.
` In 2005 there were a total of 864 Bluetooth devices qualified. This is a 45% increase over 2004.
`Foley from Bluetooth SIG said, "we expect 2006 to be an even bigger year than 2005 in terms of number of
`devices qualified." Certainly, having test equipment outfitted with EDRmeasurement capabilities available
`will help speed and ease the qualification process.
` Bluetooth UnPlugFest: Bangkok
` The Asian stop for this year's Bluetooth UnPlugFests is Bangkok from June 11-16, and just as the
`Bluetooth market continues to expand, so does UnPlugFest. The scope of this year's UnPlugFest is expanding
`beyond interoperability testing to include security testing, robustness testing, multi-profile testing and
`Profile Tuning Suite verification.
` "UnPlugFests are a key component of the Bluetooth qualification program, and with help from companies
`like Frontline [this year's sponsor of UnPlugFest] we've been able to enhance this year's program to
`include even more testing benefits for our members," said Michael Foley, executive director of the
`Bluetooth SIG. "Ensuring interoperability among all Bluetooth devices on the market is of the highest
`priority to our organization--and we expect 2006 to be an even bigger year than 2005 in terms of the
`number of devices qualified--so we hope as many members as possible participate in these critical events."
` There is good reason for Foley's optimism: Bluetooth wireless technology continues to surpass volume
`expectations and is currently shipping more than nine million products per week globally. At the end
`of2005, more than 272 million units were on the market, twice the number of units shipped in 2004,
`according to research firm Strategy Analytics.
` For more information on this year's UnPlugFests, visit http://programs.bluetooth,org/upf/
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`First batch of Bluetooth EDR testing gear arrives; TEST & MEASUREMENT
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` RELATED ARTICLE: Big bumps in the road toward interoperability with UWB.
` The Bluetooth SIG will soon publish an updated roadmap defining the development plans for Bluetooth
`out to the third quarter of 2007. One of the roadmap's objectives is to define the path for increasing
`Bluetooth's data rates from the current 3 Mbps up to 480 Mbps by using, or rather, by achieving
`interoperability with ultra wideband (UWB).But the two warring UWB alliances could make progress tough for
`Bluetooth to meet this objective.
`
` Early this year the Bluetooth SIG will issue the 2006 Bluetooth Core Specification release, code-named
`the Lisbon release. The Lisbon release is virtually complete and covers the Enhanced Data Rate 2.0 version
`of the specification. Prototyping of devices could be completedin Q2 with commercial products expected in
`late 2006.
` Then, it's expected that in early 2007 the SIG will issue the Seattle release, which will provide
`additional security features, advanced topologies and improved QoS. Other anticipated features are eSCO
`air-mode negotiation and multicast support. However, its main focus will be on providing faster data
`rates on Bluetooth devices through integration with UWB technology.
` But which technology: DS-UWB backed by the UWB Forum or MBO-FDM backed by the WiMedia Alliance? The two
`technologies are incompatible. Both cannot be incorporated into the same standard. Both are
`currently fighting it out in the marketplace.
` DS-UWB (Direct Sequencing-UWB) is backed by the UWB Forum with Freescale Semiconductor providing the
`silicon. DS-UWB is "first to market" as seen at this year's Consumers Electronics Show with Freescale and
`a group of manufacturers launching a wireless USB initiative--Cable-Free USB. (Cable-Free USB does as the
`name implies. A user can connect any two devices with 2.0 USB ports with a wireless connection.) Cable-
`Free USB products from Belkin and Gefen at CES are the first UWBproducts available to consumers.
` On the other hand, MB-OFDM (MultiBand Orthogonal Frequency Division Multiplexing) is backed by the
`WiMedia Alliance and 15 silicon vendors, including Intel.
` While UWB Forum's strategy is to quickly capture market share and establish a de facto standard--
`ironically, a strategy used successfully by Bluetooth--WiMedia's strategy is to gain credibility through
`the standards process of Ecma and ISO. With an approved standard and the weight of 15 silicon
`providers, the WiMedia Alliance members feel that they will win in the marketplace.
` However, the war cannot be a long one. Bluetooth needs a way to add higher data-rate capabilities if
`Bluetooth is to survive, and UWB probably provides the best option to add that. However, Bluetooth willbe
`faced with a real dilemma on how to move ahead with its Seattle release if neither of the two UWB
`technologies becomes a clear winner in the market soon.
`
` Bluetooth v2.0+EDR Test Capabilities
`
` Rhode & Schwarz
` Agilent Anritsu R&S CBT
`
` EDR-specific Test Cases N4010A MT8852B Bluetooth
`
`
` EDR relative transmit power test [check] [check] [check]
` (TP/TRM/CA/10/C)
`
`
` EDR carrier frequency stability [check] [check] [check]
` and modulation accuracy test
` (TP/TRM/CA/11/C)
`
`
` EDR differential phase encoding [check] [check] [check]
` test (TP/TRM/CA/12/C)
`
`
` EDR inband spurious emissions [check] [check] [check]
` test (TP/TRM/CA/13/C)
`
`
` EDR sensitivity test [check] [check] [check]
` (TP/RCV/CA/07/C)
`
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`First batch of Bluetooth EDR testing gear arrives; TEST & MEASUREMENT
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` EDR BER floor performance test [check] [check] [check]
` (TP/RCV/CA/08/C)
`
`
` EDR C/I performance test [check] [check] [check]
` (TP/RCV/CA/09/C)
`
`
` EDR maximum input level test case [check] [check] [check]
` (TP/RCV/CA/10/C)
`
` Note: The TSSITP specification uses the test purposes (TP) terminology
` that includes specific identifiers for the various types of test. TRM
` is the identifier for transmitter tests and RCV is the identifier for
` receiver tests. CA is a sub-group identifying the test of the major
` device capabilities. C is to describe a conformance test type. Also
` included is an integer number to identity the TP number.--"BIueTooth
`
` Enhanced Data Rage (EDR): The Wireles Evolution," Agilent Technologies,
` 5989-4204EN
`
`
`Load-Date: December 1, 2006
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`End of Document
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