Uplink Resource Allocation Across Carriers Without SINR Loss
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Solution Overview
Problem
Uplink transmission for ultra-reliable and low latency communication (URLLC) services faces a transmit power constraint issue due to duplicate transmissions across different carriers, which reduces the Signal to Interference plus Noise Ratio (SINR) and increases Peak to Average Power Ratio (PAPR), limiting the maximum total transmit power of terminal devices.
Innovation Solution
A method and device that allocate resource regions across multiple carriers for consecutive transmission time intervals, enabling frequency hopping patterns to define positions and sizes of resource regions, allowing terminal devices to transmit data packets without power division between carriers, thereby increasing SINR without affecting frequency diversity and avoiding PAPR increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicate transmissions are performed across different carriers concurrently, then reliability is improved, but transmit power is divided among carriers reducing SINR
Solution Approach 1:
The transmission resource is segmented across multiple carriers in the frequency domain and multiple time slots in the time domain. By dividing the data packet into multiple segments transmitted on different carriers at different times, the system achieves diversity gain without requiring simultaneous power division across carriers, thus maintaining higher SINR on each individual carrier while improving overall reliability
Solution Approach 2:
The system performs preliminary allocation of resource regions across multiple carriers before actual transmission. By pre-configuring frequency hopping patterns and resource region distributions, the terminal device can sequentially transmit data packets on different carriers without real-time power division, ensuring each transmission maintains adequate power level and SINR while achieving redundant transmission for reliability
2Reliability
If duplicate transmissions are performed across different carriers concurrently, then reliability is improved, but PAPR increases limiting maximum total transmit power
Solution Approach 1:
The transmission is segmented into sequential transmissions across different carriers rather than simultaneous transmissions. This segmentation in time-frequency space avoids the constructive interference that causes high PAPR in concurrent multi-carrier transmissions, allowing the terminal device to operate within its maximum power constraints while still achieving reliability through redundant transmissions
Solution Approach 2:
The system employs periodic frequency hopping across carriers with defined patterns. By transmitting the same data packet on different carriers at periodic time intervals according to predetermined frequency hopping patterns, the system achieves diversity gain without the PAPR penalties associated with simultaneous multi-carrier transmission, as each transmission occurs at lower instantaneous power levels
Data Source
AI summary
Embodiments of the disclosure generally relate to uplink transmission. A network device allocates resource regions for uplink transmission of a data packet of a terminal device. The resource regions are distributed across a plurality of carriers and correspond to consecutive transmission time intervals for transmitting the data packet. The network device transmits information about the resource regions to the terminal device to enable the terminal device to perform uplink transmission of the data packet based on the information.