DL-MAP Chronological Arrangement for OFDMA Processing
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Solution Overview
Problem
Current OFDM and OFDMA wireless communication systems face processing time constraints due to the need for parsing and decoding downlink MAP information elements before data bursts can be decoded, which delays overall frame processing.
Innovation Solution
Arranging DL-MAP information elements to correspond chronologically with the data bursts in the OFDM or OFDMA frame, allowing user terminals to start decoding data bursts while parsing the remaining DL-MAP, thereby reducing processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If DL-MAP information elements are arranged in arbitrary order, then the DL-MAP structure is flexible, but user terminals must wait for complete DL-MAP parsing before decoding data bursts, increasing processing time
Solution Approach 1:
The patent applies preliminary action by arranging DL-MAP information elements in chronological order corresponding to data burst transmission times before transmission. This allows user terminals to begin decoding data bursts as soon as the corresponding DL-MAP IE is parsed, without waiting for complete DL-MAP decoding. The chronological arrangement is established in advance at the base station, enabling parallel processing and reducing overall frame processing time.
2Productivity
If DL-MAP IEs are arranged in chronological order matching data bursts, then processing speed increases, but the DL-MAP structure becomes more constrained
Solution Approach 1:
The base station performs preliminary arrangement of DL-MAP IEs in chronological order before transmission, matching the data burst sequence. This pre-arranged structure enables user terminals to process data bursts in real-time as DL-MAP IEs are decoded sequentially, improving processing speed while maintaining systematic organization.
3Reliability
If user terminals wait for complete DL-MAP decoding before decoding data bursts, then parsing accuracy is ensured, but time constraints are tightened and overall frame processing is delayed
Solution Approach 1:
The chronological arrangement of DL-MAP IEs is established in advance, allowing user terminals to parse and decode IEs sequentially in the same order that data bursts are transmitted. This preliminary structuring ensures that each data burst's location information is available before the burst itself, maintaining parsing reliability while enabling immediate decoding without waiting for complete DL-MAP processing.
Solution Approach 2:
The patent enables continuous useful action by allowing parallel processing of DL-MAP parsing and data burst decoding. As DL-MAP IEs are decoded in chronological order, corresponding data bursts are decoded immediately without interruption or waiting periods, maintaining continuous processing flow and maximizing resource utilization.
Data Source
AI summary
Methods and apparatus for processing a downlink (DL) subframe of an orthogonal frequency-division multiplexing (OFDM) or an orthogonal frequency division multiple access (OFDMA) frame are provided. By arranging the DL-MAP information elements (IEs) in a DL-MAP of the DL subframe to correspond chronologically to the arrangement of their associated data bursts in the OFDM or OFDMA frame at a base station (BS), a user terminal receiving that frame may be able to start decoding the data bursts in the DL subframe without having to wait until all of the DL-MAP IEs have been parsed and decoded. In this manner, the user terminal may decode the data bursts while simultaneously parsing a remaining portion of the DL-MAP, and the time for processing the entire frame may be reduced, thereby increasing the processing speed.