SAN JOSE, Calif. An effort to create a standards group to define a Gbit/second version of Wi-Fi is getting significant push back from a separate group that sees conflict with its work in the 60-GHz space.
The IEEE 802.15 committee passed a motion Monday (July 14) asking management of the IEEE 802 group that oversees Ethernet standards to vote against a proposal to start a new effort to define a Gbit version of Wi-Fi.
The 802.15.3c subcommittee is drafting a standard for wireless links that could deliver multiple gigabits/second over 60 GHz. Members believe the so-called Very High Throughput (VHT) proposal to create a Gbit version of Wi-Fi running at 60 GHz is not significantly different from their work which is already in an early draft stage.
The .15 group asked the VHT group to revise its proposal for its review at a meeting Thursday night (July 17). Both groups are meeting as part of a regularly scheduled 802 plenary session in Denver this week.
The VHT group hopes to win support for a proposal this week so it can officially begin drafting a standard for a new version of Wi-Fi that would act as a follow on to the current .11n products shipping today. For its part, the .3c group is reviewing results on a first ballot on its initial draft for a spec that some companies hope could be used to send uncompressed video between wall-mounted displays and set-top boxes at rates up to 4 Gbits/second.
So far, the .15 group has raised several specific issues. The VHT backers have responded to each point, making concessions on a number of fronts in the latest draft of its proposal.
The .15 members have asked the Wi-Fi group to adopt its physical layer chip specification or at least provide a mechanism to detect and avoid .15 signals. The VHT group said it will study both using the .15 PHY and defining a coexistence mechanism for all 60 GHz networks. It also agreed to continue conference calls on the issue with 15.3c members that started in June.
The .15 proponents have also asked VHT members provide more specifics on how their approach is unique.
VHT backers said their spec would be different than .3c in two ways. It will let users quickly fallback from 60 GHz to 5 or 2.4 GHz 802.11n networks when needed. It will also support compatibility with the existing 802.11 services, access points and base stations as well as its management features such as association, authentication and security.
One 15.3c member asked the VHT group to admit in its proposal it has a similar scope to the .3c work. The VHT members refused that request stating, "VHT60 is proposing an amendment to 802.11 providing increased throughput to wireless LAN. This is a different scope," according to documents on discussions between the groups.
The 802 management is expected to vote late on Friday (July 18) on whether or not it will approve the VHT's proposal.