Sub-Frame Transmission Alignment for WiMax LTE Interference
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Solution Overview
Problem
The coexistence of WiMax and LTE wireless communication systems leads to interference due to overlapping channels, necessitating a method to effectively reduce interference between these standards.
Innovation Solution
A method is introduced where one communication standard is defined as the reference, and the other as the subsidiary, with sub-frames and transition gaps adjusted to align with the subsidiary standard, allowing for interference-free coexistence by performing sub-frame operations according to the subsidiary standard in blank sub-frames of the reference standard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If WiMax and LTE systems operate simultaneously on overlapping bandwidths, then both systems can provide wireless communication services, but interference occurs between the two standards
Solution Approach 1:
The patent segments the time domain by dividing the frame structure into different communication periods (first, second, and third communication periods). During each period, one standard transmits while the other pauses, creating time-division multiplexing that eliminates interference while maintaining both standards' operational capabilities
Solution Approach 2:
The patent implements periodic transmission pausing where the first standard transmits during its communication periods and pauses during the second standard's periods, and vice versa. This periodic alternating transmission pattern ensures both systems can operate regularly without continuous interference
2Productivity
If sub-frame transmission is performed according to both standards simultaneously, then communication services are provided, but uplink and downlink operations interfere with each other
Solution Approach 1:
The patent segments the frame structure into distinct communication periods where uplink and downlink operations are separated in time. The first standard performs downlink during the first period, the second standard performs uplink during the second period, and the first standard performs uplink during the third period, preventing simultaneous conflicting operations
Solution Approach 2:
The patent applies preliminary action by having the first standard complete its downlink transmission before the second standard begins its uplink operation. This sequential arrangement ensures that transmission and reception operations are properly timed and do not interfere with each other
Data Source
AI summary
A method for communication transmission includes the steps of: performing sub-frame transmission in accordance with a first communication standard and pausing sub-frame transmission in accordance with a second communication standard in a first communication period; performing a sub-frame uplink operation in accordance with the second communication standard and pausing a sub-frame uplink operation in accordance with the first communication standard in a second communication period; and performing a sub-frame downlink operation in accordance with the second communication standard and pausing a sub-frame downlink operation in accordance with the first communication standard in a third communication period. The transmission band of the first communication standard overlaps, at least partially, the transmission band of the second communication standard.