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Criterion 3: Format for data transmission over 802.16 airlink (with 802.3/Eth CS) With 802.3 CS, the 802.3 frame is carried in the 802.16 airlink payload Transparent support for 802 broadcast network data and for PPPoE Performance enhancements for wireless environment Use of 802.16 Payload Header Suppression (shrink the 802.3 header overhead to a single byte) ROHC (802.16e) can potentially eliminate the entire 802.3 overhead Also: Proxy ARP and broadcast filtering to reduce broadcasts Consequently: any repetitive headers are compressed away, but not truncated Truncation of the 802.3 header would cause loss of the ability to specify address multiple gateways, FAs, endpoints; loss of ability to transport ARP for IPv4 or 802.1x for authorization of multiple clients. |