ABI Research believes that until the advent of 802.16e mobile WiMAX systems, the wireless broadband standard will be more or less confined to the great outdoors. It postulates that some "near-outdoor" systems involving window-mounted receivers may be feasible, but for practical purposes WiMAX is considered an outdoor last-mile replacement technology.

However, ABI Research analysts say that there are optional specifications built into the 802.16 standard which can boost the sensitivity of receiving equipment to the extent of making WiMAX PC cards and built-in receivers a practical proposition for laptops, PDAs and other portable devices. According to ABI, these optional specifications have not been implemented by the largest vendors of WiMAX equipment.

However, at least two smaller companies, TeleCIS and Sequans, have been designing their chipsets to implement these under-utilized options in the standard.

According to senior analyst Philip Solis, "There may be WiMAX PC cards on the market earlier than many observers have expected. These will result from superior chipsets permitting the use of WiMAX in laptops and similar devices in homes and offices within the reach of fixed WiMAX transmissions. You will not have full mobility as you will with 802.16e, but you will have some portability."

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