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| Press Release |
October 18, 2006 |
WILLCOM Launches W-OAM-compatible Communications Module W-SIM
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WILLCOM, Inc. and WILLCOM Okinawa are pleased to announce the launch of W-SIM, a super compact communications module that is compatible with the high-speed PHS communications standard W-OAM, tentatively scheduled for mid-December 2006.
W-SIM will be displayed at WPC Tokyo 2006, in the WILLCOM-sponsored Mobile X Style! pavilion at Tokyo Big Site.
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| To provide its various services more promptly and to a wider range of customers, WILLCOM has gradually introduced base stations that are compatible with its high-speed PHS communications standard W-OAM, which automatically selects optimal modulation methods based on electromagnetic conditions. The Company plans to W-SIM, a W-OAM-compatible super compact communications module, in mid-December 2006. Using W-SIM in areas that support W-OAM will bring the following benefits for data transmission: |
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Maximum speed of 204 kbps |
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When electromagnetic conditions are unstable, stable modulation will automatically be selected, thus improving electromagnetic achievability. |
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In addition, for audio transmissions, stable communications over a wider area possible as the standard selects optimal modulation methods based on changes in the electromagnetic conditions. Please refer to the attached Reference for more information regarding W-OAM. |
No changes will be made to current monthly fees or price structure, allowing users with WILLCOM SIM STYLE-compliant terminals to take advantage of W-OAM's stable, high-speed communication services at no additional charge.
W-SIM, which is manufactured by Altel Inc., will be sold together with that company's WILLCOM SIM STYLE-compatible audio terminal '9 (nine)' (product codes RX420AL and WS009KE, respectively), beginning in mid-December 2006. It will also be sold individually beginning in mid-December 2006 (dates are tentative).
Speeds while using W-OAM for each communication method are as shown below.
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| Communication method |
Speed in current area(max.) |
Speed in areas that support
W-OAM (max.) |
| 4x packet method |
128kbps |
204kbps |
| 2x packet method |
64kbps |
102kbps |
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| 2. RX420AL Specifications |
W-OAM, WILLCOM's high-speed PHS communications standard, is an abbreviation of 'WILLCOM Optimized Adaptive Modulation'.
W-OAM automatically selects faster modulation methods depending on electromagnetic conditions. In addition to the current QPSK (Quadrature Phase Shift Keying), this communications standard automatically switches to modulation by faster 8PSK (8-Phase Shift Keying) when electromagnetic conditions are favorable and to more stable BPSK (Binary Phase Shift Keying) when electromagnetic conditions are unstable.
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W-OAM Communication (Images) |
| Data Transmission Process |
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| Audio Communication Process |
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The frequency for audio
transmission is 32 kbps within the QPSK
area and 16 kbps within the BPSK area.
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The area supporting W-OAM is centered on large urban areas and gradually expanding outward. |
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