Broadcast Receiver Sub-Block Masking for Power Reduction
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Solution Overview
Problem
In mobile communication systems using CDMA2000 1x Rev. D standards, the current broadcast data transmission method with outer-coding results in subscribers receiving unnecessary data, increasing complexity and power consumption due to the need to decode multiple broadcast service frames, even for a single desired service.
Innovation Solution
The method involves generating a broadcast parameter message indicating the sub-buffer location of desired frames and selectively receiving only those frames, using a sub-block based mask to ensure each sub-buffer contains only one broadcast service, thereby minimizing unnecessary decoding and data bits to be processed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Reed-Solomon coding is used to prevent burst transmission errors, then reliability is improved, but device complexity increases due to the need to decode multiple broadcast service frames
Solution Approach 1:
The patent segments the sub-buffer into multiple sub-blocks, where each sub-block corresponds to a specific broadcast service. This segmentation allows the receiver to identify and decode only the relevant sub-block containing the desired service, rather than decoding all broadcast service frames. The sub-block structure enables selective reception while maintaining the error prevention benefits of Reed-Solomon coding.
2Reliability
If all broadcast service frames are received to ensure complete data, then reliability is improved, but use of energy increases due to decoding unnecessary data
Solution Approach 1:
The patent extracts only the necessary sub-block containing the desired broadcast service from the entire sub-buffer. By identifying the specific sub-block through the sub-block indicator and extracting only that portion for decoding, the system ensures data completeness for the desired service while avoiding the energy consumption associated with decoding other broadcast service frames.
3Productivity
If multiple broadcast services are multiplexed in the same sub-buffer, then productivity is improved, but device complexity increases due to difficulty in identifying desired frames
Solution Approach 1:
The patent divides the sub-buffer into distinct sub-blocks, with each sub-block dedicated to a specific broadcast service. This segmentation maintains high channel efficiency by allowing multiple services to share the sub-buffer while simplifying frame identification through the sub-block indicator, which directly points to the relevant sub-block without requiring complex search or identification mechanisms.
Data Source
AI summary
A method and apparatus for transmitting and receiving a broadcast service in a mobile communication system which outer-codes frames for a plurality of broadcast services and Time Domain Multiplex (TDM)-transmits the outer-coded frames. A transmitter transmits a broadcast parameter message comprising information indicating a specific sub-buffer in which respective broadcast services are stored. A receiver for receiving the broadcast parameter message from the transmitter, and maps the sub-buffer to a corresponding sub-block mask based on the broadcast parameter message. The transmitter TDM-transmits the frames for the plurality of broadcast services per sub-block. The receiver selectively receives frames for a desired broadcast service using the sub-block mask and decodes the selectively received frames.