Patent ID: 6061366
Filing Date: 2000-05-09
Classification: H04L

Abstract:
A transmitting device comprising:a first storing circuit which stores a control field of a post-transmission packet signal;a comparing circuit which compares the control field of a pre-transmission packet signal with the control field stored in said first storing circuit; anda control field substituting circuit which transmits a packet signal by substituting identical information for at least a part of the control field of said pre-transmission packet signal on the basis of the result of comparison by said comparing circuit,wherein said first storing circuit includes a plurality of cache memories which store a plurality of control fields, and further comprises a cache memory renewing circuit which, upon input of a new control field, moves the contents stored in said plurality of cache memories from one cache to the next one after another, and stores said new control field in the very front entry of said plurality of cache memories.