The Personal Handy Phone System in Japan’s
`Wireless Communication Market
`
`Application Note
`
`System and Market
`Overview
`
`The Personal Handy Phone System
`(PHS) offers a new, lower cost
`alternative for digital communica-
`tions. Developed for Japan’s
`booming cellular phone market,
`PHS is now being marketed out-
`side the country, particularly in
`Asian countries.
`
`This paper briefly surveys the
`Japanese wireless marketplace
`and positions PHS relative to other
`popular digital communication
`systems. This paper also intro-
`duces HP’s test products for PHS.
`
`Wireless communications in
`Japan today
`
`Japan’s wireless communication
`market has boomed since the gov-
`ernment deregulated the sale of
`cellular phones in April 1994 and of
`pagers in March 1995. The number
`of cellular phone subscribers
`reached about 8 million by
`December 1995, with 6 million new
`subscribers added since the open-
`ing of the market. The number of
`pager subscribers has grown to an
`estimated 10 million today.
`
`Table 1 on page 2 compares the
`current and emerging wireless sys-
`tems in Japan. The country’s
`Personal Digital Cellular (PDC)
`phone system is based on time
`division multiple access (TDMA)
`and frequency division multiple
`access (FDMA) technologies simi-
`lar to the TDMA-based North
`American Digital Cellular (NADC)
`system in the U.S., although PDC
`is not a dual-mode system as is
`NADC. Among the rapidly growing
`number of cellular subscribers,
`more than 30% now use PDC
`phone operating at both 800 MHz
`and 1.5 GHz.
`
`Japan has also recently adopted a
`new digital paging system to han-
`dle the large number of new users
`as well as new paging applications.
`The system is called FLEX-TD, and
`it is based on Motorola’s FLEX™
`protocols. Commercial FLEX-TD
`service is expected to begin in
`Spring 1996.
`
`To compete with established cellu-
`lar radio systems, three operators
`in Japan began offering PHS ser-
`vice in July 1995 in cities, railway
`stations, and shopping areas. One
`million subscribers are expected
`in the first year of service. The
`Personal Handy Phone System is
`described in greater detail below.
`
`This opening of the wireless com-
`munication market in Japan has
`led to more competition, lower
`prices for subscriber services, the
`introduction of new products and
`services, and a surge of investment
`in the communication infrastruc-
`ture. Now the critical business
`issues for wireless network opera-
`tors are time to market, cost
`reduction, and better customer
`service.
`
`This literature was published years prior to the establishment of Agilent Technologies as a company independent from Hewlett-Packard
`and describes products or services now available through Agilent. It may also refer to products/services no longer supported by Agilent. We
`regret any inconvenience caused by obsolete information. For the latest information on Agilent’s test and measurement products go to:
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`
`SAMSUNG ELECTRONICS CO., LTD., v. AFFINITY LABS OF TEXAS, LLC
`IPR2014-01181 EXHIBIT 2009 – 1
`
`

`
`However, in terms of mobility and
`cell coverage, the conventional
`cellular system has an advantage.
`So most industry observers expect
`that for voice applications today,
`the lower service cost but lower
`mobility of PHS will appeal pri-
`marily to customers for personal
`use, while the higher mobility of
`PDC will keep that system the first
`choice of businesses.
`
`For transmitting data, PHS has an
`advantage over PDC systems. PHS
`can transmit non-voice data at full
`rate (32 kb/s), three times the rate
`of PDC. This ability makes PHS an
`ideal candidate for data modem
`applications with laptop PCs and
`multimedia. In the future, PHS
`may be incorporated into Personal
`Digital Assistant (PDA) devices.
`
`Architecture of the Personal
`Handy Phone System
`
`PHS is a digital cordless phone
`system based on TDMA and TDD
`(time duplex) technologies. It
`operates in the 1.9 GHz frequency
`band. The PHS personal station
`(PS) handset can be used for resi-
`dential, business (office PBX), and
`public services. Like conventional
`transceivers, the system can estab-
`lish a direct communication link
`between two PS’s without requir-
`ing a cell site (see illustration). A
`similar system that uses TDMA
`and TDD technologies is the
`Digital European Cordless
`Telephone (DECT) system; howev-
`er, DECT is suited primarily for
`business use.
`
`PHS uses the existing analog tele-
`phone network and ISDN to offer
`services. The system therefore
`does not need the same kind of
`complex network that is required
`for a cellular radio system such as
`PDC. This fact enables PHS to
`offer services priced lower than
`those of the cellular phone system,
`and to expand the PHS service
`area in a very short time.
`
`Personal Handy Phone System
`
`Table 1. Japanese digital wireless systems
`
`System name
`Type of system
`Frequency band
`Channel spacing
`Duplex method
`Duplex number
`Bit rate
`Modulation
`Mobile Tx power
`TDMA frame
`Voice CODEC
`Air interface standard
`
`PHS
`Digital cordless
`1.9 GHz
`300 kHz
`TDMA, TDD
`4 (full rate)
`384 kb/s
`Pi/4 DQPSK
`10 mW avg
`5 ms
`32 kb/s, ADPCM
`RCR-STD-28
`
`PDC
`Public cellular
`800 MHz/1.5 GHz
`50 kHz
`TDMA, TDM
`3 (full), 6 (half)
`42 kb/s
`Pi/4 DQPSK
`3 to 0.3 W peak
`40 ms
`11.2, 5.6 kb/s
`RCR-STD-27C
`
`D-MCA
`Digital SMR
`1.5 GHz
`25 kHz
`TDMA
`6
`64 kb/s
`M-16 QAM
`< 2 W
`90 ms
`7.467 kb/s
`RCR-STD-32
`
`FLEX-TD
`Pager
`280 MHz
`N/A
`N/A
`N/A
`1.6, 3.2, 6.4 kb/s
`2 FSK, 4 FSK
`N/A
`N/A
`N/A
`RCR-STD-43
`
`SAMSUNG ELECTRONICS CO., LTD., v. AFFINITY LABS OF TEXAS, LLC
`IPR2014-01181 EXHIBIT 2009 – 2
`
`

`
`HP’s contribution to PHS RF
`performance testing
`
`The PHS standard includes
`required performance tests and
`test procedures for personal sta-
`tions and cell stations. HP has
`been working closely with PHS
`radio manufacturers to develop
`equipment and application soft-
`
`Table 2 points out key differences
`between the PHS and PDC sys-
`tems. Table 3 compares key speci-
`fications of the PHS and DECT air
`interfaces. The PHS standard air
`interface and air protocol for pub-
`lic use was developed in 1993 by
`ARIB (the Association of Radio
`Industries and Businesses, former-
`ly RCR, the Research and
`Development Center for Radio
`Systems) as RCR-STD-28.
`
`PHS Mou under the ARIB is pro-
`moting the use of the system out-
`side of Japan, particularly in Asia.
`Several licenses have been issued
`in Hong Kong, where PHS is being
`considered for use as a wireless
`local loop network as an alterna-
`tive to expensive wired telephone
`network infrastructure.
`
`ware needed for RCR-STD-28 tests
`and those required by other bodies
`as the Radio Equipment Inspection
`and Certification Institute (called
`the MKK in Japan) that give type
`approval and certification to radio
`communication systems.
`
`To optimize its responsiveness to
`the test requirements of new wire-
`less communication systems such
`as PHS, HP Japan has set up a
`local R&D team at its Kobe
`Instrument Division. The team has
`introduced a complete PHS test
`solution that includes a PHS radio
`communication test system and
`transmitter testers needed for
`measuring the performance of
`PHS handsets and base stations.
`HP Japan’s service engineering
`organization also builds special
`custom PHS test systems (see
`photo on previous page) and soft-
`ware for PHS base station manu-
`facturers and provides consulta-
`tion services as well.
`
`PHS custom test system
`
`Table 2. Key differences between PHS and PDC
`
`Table 3. Comparison of PHS and DECT air interface specifications
`
`Base station coverage
`Base station cost
`Service area
`Mobility
`Voice quality
`Data transmission
`Network structure
`Cost of service
`Cost of handset
`
`PHS
`Small (100-500 m)
`Low
`Major cities, spots
`Low
`High
`Highly suitable
`Public network
`Low
`Low
`
`PDC
`Large (1.5-10 km)
`High
`Major cities, area
`High
`Low
`Suitable
`Special network
`High
`High
`
`Frequency range
`Channel spacing
`Duplex method
`Duplex number
`Bit rate
`Modulation
`PS Tx power
`CS Tx power
`TDMA frame
`Voice CODEC
`
`PHS
`1895 to 1918.1 MHz
`300 kHz
`TDMA/TDD
`4
`384 kb/s
`Pi/4 DQPSK
`10 mW avg
`<500 mW avg
`5 ms
`32 kb/s, ADPCM
`
`DECT
`1880 to 1900 MHz
`1738 kHz
`TDMA/TDD
`12
`1152 kb/s
`GFSK
`10 mW avg
`10 mW avg
`10 ms
`32 kb/s, ADPCM
`
`SAMSUNG ELECTRONICS CO., LTD., v. AFFINITY LABS OF TEXAS, LLC
`IPR2014-01181 EXHIBIT 2009 – 3
`
`

`
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`or services, please call your local Hewlett-
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`able via Web through AccessHP at
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`
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`below and they will direct you to your nearest
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`
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`
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`Company
`
`5964-6753E
`
`HP 8920 DT digital RF communication test set
`
`The following paragraphs descibe
`some of HP’s PHS test products.
`
`HP 8920DT digital RF commu-
`nication test system
`This test system is designed for
`high volume production test of
`PHS (personal station and cell sta-
`tion) or PDC subscriber units,
`depending on system configura-
`tion. The system provides the nec-
`essary in-channel testing of the
`performance of PHS or PDC trans-
`mitters and receivers. It can be
`expanded with other HP test
`equipment such as the HP 8590
`series low cost spectrum analyzers
`for spurious and other testing.
`
`HP 85726B PHS measurement
`personality
`This measurement personality is a
`software program on a ROM card
`for the low cost HP 8590 series
`spectrum analyzers. The card adds
`dedicated measurement features
`for the testing of PHS transmitter
`performance as required by RCR-
`STD-28 and for the technical stan-
`dard conformity certification test
`procedure specified by the MKK.
`
`HP 89441A Option AYA vector
`modulation analyzer
`This analyzer is the ideal R&D tool
`for verifying PHS and PDC trans-
`mitter signal quality. It provides
`measurements such as error vec-
`tor magnitude (EVM) and EVM
`versus symbols, and operation
`from dc to 2.65 GHz.
`
`SAMSUNG ELECTRONICS CO., LTD., v. AFFINITY LABS OF TEXAS, LLC
`IPR2014-01181 EXHIBIT 2009 – 4