Method for reducing signaling overhead in a multicarrier system with dynamic bit allocation and corresponding transmitter/receiver device
AssigneeSiemens Aktiengesellschaft
InventorsEdgar Bolinth, Wolfgang Gröting, Ralf Kern, Giancarlo Lombardi
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Abstract
A method for reducing signaling overhead in a multicarrier system with dynamic bit allocation per subcarrier and a corresponding transmitter/receiver device, are provided wherein an established bit allocation table (BAT) that is provided with an index (I) is stored in a BAT storage device (LUT). In order to reduce signaling overhead, only the corresponding index (I) of an existing bit allocation table is transmitted (S6).
Claims12
A method for reducing signaling overhead in a multicarrier system with dynamic bit allocation, the method comprising the steps of:
- establishing transmission characteristics of a transmission channel;
- establishing a bit allocation table based on the established transmission characteristics;
- comparing the established bit allocation table with bit allocation tables stored and indexed in a storage device;
- determining if the established bit allocation table corresponds to one of the stored bit allocation tables and, if so, transmitting only an index of the corresponding stored bit allocation table to implement a bit allocation table alignment during signaling;
- and
- determining if the established bit allocation table does not correspond to one of the stored bit allocation tables and, if not, performing the additional step of:
- verifying a number of bit allocation tables stored in the storage device and, if a maximum number of bit allocation tables stored in the storage device is exceeded, performing the additional steps of:
- determining a difference in respect of a subsequent stored bit allocation table;
- and
- transmitting both the difference and the index of the subsequent stored bit allocation table.
A receiver device for reducing signaling overhead in a multicarrier system with dynamic bit allocation, comprising:
- a bit loading device for generating bit allocation tables based on established channel characteristics;
- a receiver controlled unit for analyzing the generated bit allocation tables;
- and
- a storage device for storing a number of bit allocation tables as well as an index for each bit allocation table;
- wherein the receiver control unit only outputs an index for transmission to implement a bit allocation table alignment during signaling if the generated bit allocation table corresponds to a bit allocation table stored in the storage device, and adjustment to modified channel characteristics is carried out based on the generated bit allocation table, with the receiver control unit verifying a number of bit allocation tables stored in the storage device and, if a maximum number of bit allocation tables stored in the storage device is exceeded, determining a difference in respect of a subsequent stored bit allocation table and outputting the index of the subsequent bit allocation table and the difference in respect of the subsequent stored bit allocation table for transmission to implement a bit allocation table alignment during signaling.
Dependencies are inferred from the claim text.