Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2008-05-27
2008-05-27
Jagannathan, Melanie (Department: 2619)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S412000, C370S420000, C370S429000, C711S101000, C711S129000, C711S147000
Reexamination Certificate
active
10491347
ABSTRACT:
So-called LCH packets are defined in the Hiperlan Type 2 System for wire-free transmission of video and audio data streams. These LCH packets have a length of 54 data bytes. Furthermore, the Hiperlan/2 Standard provides for so-called ARQ messages to be sent back to the transmitter in an SCH packet in a QOS mode (Quality Of Service), in which all the LCH data packets must be confirmed by the receiver. Space for the LCH and SCH data packets must be provided in a buffer store in the Hiperlan/2 interface for each connection that is set up. When there is a possibility of several hundred connections having been set up, separate reservation of memory areas for LCH and SCH packets would involve considerable complexity for the memory organization. The invention proposes that only one common area be reserved for LCH and SCH packets in the buffer store. The section which is provided for each LCH package is of such a size that it corresponds to a value 2nwhere nε[0, 1, 2, 3, . . . ], and this results in the hardware unit for the address calculation of these data section starts being greatly simplified. However, the area is chosen to be larger than actually required for the buffer storage of one LCH packet. The SCH packets, which likewise need to be buffer-stored, are entered in the unused part of such a section for an LCH packet. This considerably reduces the complexity for memory organization without having to leave a major proportion of the memory unused.
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Borsum Malte
Brune Thomas
Gaedke Klaus
Jagannathan Melanie
Kiel Paul P.
Laks Joseph J.
Thomson Licensing
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