Effectively, the
10G EPON Study Group was officially transformed into 10G EPON task force (TF),
identified as IEEE 802.3av, which is chartered with development and standardization
of 10G EPON systems, providing increased channel capacity for both upstream and
downstream channels, while maintaining the logical layer intact, taking advantage of
the already existing specification of MPCP and DBA agent, which will remain compatible
with legacy 1 Gbps EPONs.
The following system architecture evaluation process revealed that the future 10G
EPON equipment must provide a gradual evolution path from the currently deployed
1 Gbps equipment, thus both symmetric and asymmetric data rates must be supported
for both downstream and upstream channels. Since this evolution inherently assumes
coexistence with legacy IEEE 802.3ah compliant equipment on the same PON plant,
the 10G EPON TF must therefore resolve a number of technical issues, including the
wavelength allocation issues for both data channels in a satisfactory manner, providing
feasible technical solutions, especially in the upstream channel, as indicated below. As
for this moment, no motions regarding the coexistence issues are officially approved by
the TF.
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