Hardware LCCH Steal Receiving Circuit for TDMA Control Processor Load
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Solution Overview
Problem
The existing receiving circuit for TDMA-based radio communication systems overloads the control processor when setting and clearing the LCCH steal counter is done by software, affecting primary sending and receiving control processes.
Innovation Solution
A receiving apparatus with hardware circuits including a demodulating unit, UW detecting unit, frame-timing unit, control channel timing unit, and channel control unit, which automatically switches synchronous patterns and clears the LCCH steal counter, reducing the software processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the receiving frequency and UW expected value are switched and the LCCH steal counter is cleared by software, then LCCH steal receiving can be implemented, but the control processor becomes overloaded
Solution Approach 1:
The patent replaces software-based control with hardware-based control by implementing dedicated hardware circuits for frequency switching and counter management. The hardware circuit automatically manages the LCCH steal counter and frequency transitions, eliminating the need for software intervention and thereby preventing control processor overload while maintaining LCCH steal receiving capability.
2Adaptability or versatility
If software is used to manage LCCH steal counter, then flexibility in counter control is maintained, but processing time increases and control processor is overloaded
Solution Approach 1:
The hardware circuit is designed to automatically manage the LCCH steal counter without requiring software control. The circuit self-regulates frequency switching and counter clearing based on predetermined conditions, eliminating software processing time while maintaining the flexibility needed for proper counter management during LCCH steal receiving operations.
3Measurement precision
If frequency switching is performed manually by software, then control precision is maintained, but system response time increases
Solution Approach 1:
The patent implements hardware-based frequency switching that operates independently of software processing. The hardware circuit directly controls frequency transitions based on timing signals and counter states, achieving both precise frequency switching and rapid response time simultaneously, thereby resolving the contradiction between precision and speed.
Data Source
AI summary
LCCH steal receiving is done by a receiving unit which uses TDMA method without overloading to the control processor. A UW detecting unit 10 for detecting a UW by setting a UW expected value for control channel according to a timing signal TM3 from a LCCH timing unit 30, a frame timing unit 20 for outputting a frame timing signal TM1 of the frame according to a UW detecting signal DET, the LCCH timing unit 30 for outputting a timing signal TM3 for the UW detecting unit 10 and a timing signal TM5 for a PLL control unit 40 by counting the timing signal TM1, and the PLL control unit 40 for selecting and outputting a channel setting signal CH for a PLL2 according to the timing signal TM5 are all configured by hardware circuits. By the above configuration, the LCCH steal receiving becomes possible without software operations of the receiving units.