Method for contention free traffic detection
DCFirst Claim
1. A method for detecting priority of data frames in a network comprising the steps ofextracting a bit pattern from a predetermined position in a frame,comparing said extracted bit pattern with a search pattern, andidentifying a received frame as a priority frame in case said extracted bit pattern matches with said search pattern, wherein said predetermined position in said frame is defined by the offset of said bit pattern in said frame.
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Abstract
The invention discloses a method for detecting priority of data frames comprising the steps of extracting (S1) a bit pattern from a predetermined position in a frame, comparing (S2, S3) the extracted bit pattern with a search pattern, and identifying (S4) the received frame as a priority frame in case the extracted bit pattern (BP) matches with the first search pattern (SP). By this method, the priority of a data frame can easily be detected. The invention also proposes a corresponding device for detecting priority of data frames.
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Citations
18 Claims
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1. A method for detecting priority of data frames in a network comprising the steps of
extracting a bit pattern from a predetermined position in a frame, comparing said extracted bit pattern with a search pattern, and identifying a received frame as a priority frame in case said extracted bit pattern matches with said search pattern, wherein said predetermined position in said frame is defined by the offset of said bit pattern in said frame.
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6. A method for detecting priority of data frames in a network comprising the steps of
extracting a bit pattern from a predetermined position in a frame, comparing said extracted bit pattern with a search pattern, and identifying a received frame as a priority frame in case said extracted bit pattern matches with said search pattern, wherein a plurality of different bit patterns, search patterns and offsets are used to detect priority of said frames.
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7. A method for detecting priority of data frames in a network comprising the steps of
extracting a bit pattern from a predetermined position in a frame, comparing said extracted bit pattern with a search pattern, identifying a received frame as a priority frame in case said extracted bit pattern matches with said search pattern, and forwarding said received frame to a high priority queue in case said frame is detected to be a high priority frame during a special period for sending priority traffic.
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10. A device for detecting priority of data frames comprising
a receiving means for receiving data frames; -
an extracting means for extracting a bit pattern from a predetermined position of a data frame; a comparing means for comparing said extracted bit pattern with a predetermined search pattern; and an identifying means for identifying said received frame as a priority frame in case said extracted bit pattern matches with said first search pattern, wherein said predetermined position is defined by an offset, and wherein said offset and said search pattern are included in an information element. - View Dependent Claims (11, 12, 13)
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14. A device for detecting priority of data frames comprising
a receiving means for receiving data frames; -
an extracting means for extracting a bit pattern from a predetermined position of a data frame; a comparing means for comparing said extracted bit pattern with a predetermined search pattern; and an identifying means for identifying said received frame as a priority frame in case said extracted bit pattern matches with said first search pattern, wherein a plurality of different bit patterns, search patterns and offsets are used to detect priority of said frames.
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15. A device for detecting priority of data frames comprising
a receiving means for receiving data frames; -
an extracting means for extracting a bit pattern from a predetermined position of a data frame; a comparing means for comparing said extracted bit pattern with a predetermined search pattern; and an identifying means for identifying said received frame as a priority frame in case said extracted bit pattern matches with said first search pattern, wherein a controlling means forwards said received frame to a high priority queue in case said frame is detected to be a high priority frame during a special period for sending priority traffic. - View Dependent Claims (16, 17)
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18. Method for generating priority detecting information, comprising the steps of:
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identifying a bit pattern indicating a priority state in a data frame, defining said identified bit pattern as a search pattern, locating said bit pattern within said data frame, determining the offset of the location of said bit pattern, and producing an information element including said offset and said search pattern.
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Specification