Linear Cellular Node Space-Time Block Coding for High-Speed Handover

The patent applies asymmetry by making each node transmit different block code representations (first and second representations) of the same data through its two antennas, rather than identical signals. This asymmetric transmission pattern allows the receiver to distinguish between signals from different nodes, reducing interference at cell boundaries while maintaining comprehensive coverage.

The patent changes the signal parameter by applying space-time or space-frequency block coding to generate different physical representations of the same data. This parameter transformation enables the system to maintain signal distinguishability across overlapping coverage areas, improving signal-to-noise ratio at cell boundaries while preserving coverage versatility.

The patent implements multi-functionality by enabling each node to serve dual purposes: transmitting data to user terminals within its own coverage area while simultaneously providing signal diversity to user terminals at cell boundaries. The block coding scheme allows the same transmitted data to benefit both local users and boundary users, maximizing channel resource utilization across the entire network.

The patent uses copying by transmitting different block code representations of the same data content through multiple antennas. This creates redundant yet distinguishable signal copies that can be independently decoded, thereby improving signal-to-noise ratio without wasting channel resources, as the same data payload is efficiently delivered through multiple paths.

The patent applies preliminary action by pre-synchronizing the transmission of the same data content from multiple nodes using block coding. This preliminary coordination ensures that user terminals receiving signals from multiple nodes can continuously decode data without interruption during handover, as the data representations are already prepared and synchronized across nodes before the handover event occurs.

The patent maintains continuity of useful action by enabling user terminals to receive and decode data from multiple nodes simultaneously through block-coded transmissions. This continuous reception capability eliminates handover interruptions, as the terminal can seamlessly switch between node signals without losing data, thereby maintaining uninterrupted communication during high-speed mobility.