PUSCH Transmission in LTE TDD Special Subframe UpPTS
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Solution Overview
Problem
The existing LTE TDD system does not support transmission of a Physical Uplink Shared Channel (PUSCH) in the UpPTS of a special sub-frame, lacking a defined scheduling timing for PUSCH transmission in this context.
Innovation Solution
A method and apparatus are introduced to enable PUSCH transmission in the UpPTS by having a base station transmit a downlink control channel with an uplink DCI format and/or a PHICH in a sub-frame n to schedule the UE to transmit a PUSCH in a special sub-frame n+k, where k is a predefined value, allowing the UE to adjust its transmission accordingly based on the received downlink control channel and PHICH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUSCH transmission is not supported in UpPTS of special sub-frame, then the system maintains existing simple scheduling structure, but uplink transmission capability is limited
Solution Approach 1:
The patent extends the functionality of special sub-frames by enabling PUSCH transmission in UpPTS, allowing the same time resource to serve both traditional UpPTS functions and new data transmission purposes. This multi-functionality increases adaptability without requiring separate dedicated resources.
Solution Approach 2:
The patent modifies the scheduling timing parameters by defining specific k values that relate downlink sub-frame n to special uplink sub-frame n+k. This parameter-based approach allows flexible configuration of scheduling timing while maintaining system structure.
2Adaptability or versatility
If scheduling timing for PUSCH in special sub-frame is not defined, then the existing scheduling mechanism remains simple, but PUSCH transmission cannot be scheduled in UpPTS
Solution Approach 1:
The patent pre-defines the scheduling timing relationship between downlink control channels and PUSCH transmissions in special sub-frames by specifying k values. This preliminary definition of timing parameters enables PUSCH scheduling in UpPTS without requiring complex runtime decisions.
3Adaptability or versatility
If downlink control channel is transmitted in sub-frame n to schedule PUSCH in special sub-frame n+k, then scheduling flexibility is improved, but timing coordination complexity increases
Solution Approach 1:
The patent uses parameter k to represent the timing offset between downlink sub-frame n and special uplink sub-frame n+k. By defining specific k values for different configurations, the system achieves scheduling flexibility while managing timing coordination through parameterization rather than complex logic.
Data Source
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AI summary
The application discloses a physical uplink shared channel data transmission method and device. The method comprises: a terminal adjusts or schedules, according to detected downlink control channel data utilizing an uplink DCI format and/or PHICH data in a subframe n, PUSCH data to be transmitted in a special subframe (n+k), wherein k is a predefined value. A base station transmits the downlink control channel data utilizing the uplink DCI format and/or the PHICH data in the subframe n, to adjust or schedule the terminal to transmit the PUSCH data in the special subframe (n+k), wherein k is a predefined value. The application provides a schedule timing definition for transmitting PUSCH data in a special subframe, thereby ensuring normal transmission of the PUSCH data in the special subframe.