Patent ID: 6104728
Filing Date: 2000-08-15
Classification: H04L,Y10S

Abstract:
A device for the selection of address words, each having n bit locations and serving for addressing m different receiving locations of a digital communications means, in at least one of the receiving locations, comprising a digital acceptance means via which address words can be selected which are acceptable for the particular receiving location in consideration, with said acceptance means comprising:a) an address word segmenting means through which each address word received by the receiving location can be subdivided into s address word segments with b segment bit locations each, wherein b=n/s and n is an integral multiple of s;b) a decoder having a decoder input adapted to be fed with the segment bit pattern of the respective address word segment of the particular address word to be examined for acceptance, for decoding thereof in accordance with a predetermined decoding algorithm, and having a decoder output at which, for each of the possible segment bit patterns, a decoder output bit pattern representing only this segment bit pattern is available;c) s filter registers associated with one of the address word segments each, for storing filter register bit patterns each corresponding at least to one of all those decoder output bit patterns that are created in decoding of all those segment bit patterns that may occur in the respectively associated address word segment of all address words that are acceptable for the receiving location in consideration;d) a comparison means through which the decoder output bit pattern resulting from decoding of the segment bit pattern of the respective address word segment can be compared with the contents of the respectively associated filter register, to the effect whether or not the decoder output bit pattern resulting from the respective decoding operation is in conformity with one of the filter register bit patterns stored in this filter register, and at the output of which an examination result signal is available which, in accordance with the particular examination result, is either a conformity signal ""1"" or a non-conformity signal ""0""; ande) an evaluation means which, upon decoding of all address word segments belonging to the respective address word received, delivers an acceptance signal only when a conformity signal has been present at the output of the comparison means for each address word segment of this address word.