AT&T ended the year hoping its 3G network users will ease up on wireless data use while it upgrades the network. Even if the problem is technically with the Apple iPhone, AT&T took the heat. Carriers are pinning their hopes on three emerging 4G wireless business models for Long-Term Evolution (LTE) and WiMAX broadband. Many wireless operators with 3G networks lined up behind LTE this year. Find out why LTE is the preferred 4G wireless solution. But to make LTE work, the LTE handsets and operations software and systems (OSS) have to be in sync. Then there's 4G LTE voice. (Does anyone even talk anymore?) It seems that voice-over-LTE standards are still necessary, which may put IMS back in the spotlight. NEXT: Service layer architecture -- Rethinking network layers for profit |
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