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AssigneeNokia Mobile Phones (U.K.) Limited
InventorAndrew Cooper
Estimating the term…
A method of receiving data transmitted in a burst-mode radio communications such as GSM. Prior to transmission a set of first data elements (bits) relating to a first message which may be associated with a first channel type (e.g. a traffic channel (TCH) in GSM) has selected bits substituted or "stolen" by data elements (bits) relating to a second message which may be associated with a second channel type (e.g. a fast associated channel FACCH in GSM). The data elements relating to the first and second messages are interleaved over the same or a different number of bursts. In a normal GSM traffic burst two single-bit flags are set to `1` to indicate respectively when the even bits or the odd bits of the burst have been stolen for FACCH data. A detector (5) is used to monitor the flags from the same number of bursts over which the FACCH is interleaved. In order to improve the chance of detecting a FACCH in noisy conditions a majority-vote circuit (9) is employed whereby a FACCH decode is initiated if the number of detected flags set to `1` exceeds a threshold value. Specifically, in the case of FACCH, the threshold value may be 5-8, i.e more than half the number of bursts over which the FACCH data is interleaved.
A receiver for receiving data transmitted in a burst-mode radio communications system, wherein first data elements relating to a first message are interleaved over a first plurality of bursts, and selected data elements relating to said first message are substituted by second data elements relating to a second message and interleaved over a second plurality of bursts, each burst including flag means which can be set to indicate if data elements relating to the first message have been substituted by data elements of the second message, the receiver comprising:
A method of receiving data transmitted in a burst-mode radio communications system, wherein first data elements relating to a first message are interleaved over a first plurality of bursts, and selected first data elements relating to said first message are substituted by second data elements relating to a second message and interleaved over a second plurality of bursts, each burst including flag means which can be set to indicate if first data elements relating to the first message have been substituted by second data elements of the second message, which method includes the steps of:
Dependencies are inferred from the claim text.