Appeal No. 2006-0697
Reexamination 90/006,402
internally for control, scheduling and network management, also is an unscheduled datagram
service and can be used for datagram services.
“Datagram” and “datagram service” are not defined in Chan. However, the examiner
cited to numerous literature in the art and thus has established that the term “datagram” is a well
known term of art which refers to individual portions of an entire message for transmission, each
of which is a data packet containing within it sufficient routing or address information for that
packet to be routed from source to destination independently of all other data packets. The
examiner has also established that “datagram service” is a well known term of art meaning that
an entire message is divided into multiple datagrams which are transmitted independently of
each other and routed respectively based on destination address information contained within
them.
The examiner cited to “8th Newton’s Telecom Dictionary, The Official Dictionary of
Computer Telephony, Telecommunications, Networking, Data Communications, Voice
Processing and the Internet” by Harry Newton, as defining “datagram” as follows (Answer pp.
19-20):
A transmission method in which sections of a message are transmitted in scattered
order and the correct order is re-established by the receiving workstation . . . “A
single unacknowledged packet of information that is sent over a network as an
individual packet without regard to previous or subsequent packets.” . . . A
finite-length packet with sufficient information to be independently routed
from source to destination. In packet switching, a self-contained packet,
independent of other packets, that [carries] information sufficient for routing
from the original data terminal equipment to the destination data terminal
equipment, without relying on earlier exchanges between the equipment and
the network. . . . Datagram transmission typically does not involve end-to-end
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