Uplink MIMO Transport Block Generation Under No-Data Retransmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring the availability of two transport blocks for uplink spatial multiplexing, especially when no data is available for transmission, leading to inefficiencies in data communication.
Innovation Solution
A method is introduced where a wireless communication system generates and transmits two transport blocks, one for new transmission and the other for retransmission, even when no data is available, by utilizing parameters indicating MIMO layers and UL skipping, ensuring efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the system skips UL transmission when no data is available, then energy consumption is reduced, but the availability of transport blocks for uplink spatial multiplexing deteriorates
Solution Approach 1:
The system performs preliminary preparation by generating a transport block even when no data is available in the buffer. This preliminary action ensures that the transport block is ready for transmission when the UL grant is received, resolving the contradiction between energy saving (by skipping transmission only when truly necessary) and reliability (by having transport blocks ready when needed).
Solution Approach 2:
The system dynamically adjusts its behavior based on the presence of UL grants. When UL grants are received, the system generates and transmits transport blocks even without data. When no UL grants are received, the system skips transmission to save energy. This dynamic adaptation resolves the contradiction between energy consumption and transport block availability.
2Reliability
If the system generates transport blocks even when no data is available, then uplink spatial multiplexing reliability is improved, but resource waste increases
Solution Approach 1:
The system performs partial action by generating transport blocks only when UL grants are received, not continuously. This partial generation avoids excessive resource consumption while ensuring transport blocks are available when needed for uplink spatial multiplexing, resolving the contradiction between reliability and resource waste.
Solution Approach 2:
The system serves itself by using the received UL grant as the trigger condition for generating transport blocks. The UL grant itself provides the necessary indication to generate the transport block, making the system self-regulating and avoiding unnecessary resource consumption while maintaining reliability.
3Productivity
If the system transmits two transport blocks for spatial multiplexing, then data throughput is improved, but device complexity increases
Solution Approach 1:
The system changes the triggering parameter from continuous data availability to UL grant reception. This parameter change simplifies the decision logic for generating transport blocks - the system simply checks if a UL grant is received and generates blocks accordingly, reducing management complexity while maintaining the capability to transmit two transport blocks for high throughput.
Data Source
AI summary
Methods, systems, and apparatuses are provided for transport block generation with retransmission of Multi-Input Multi-Output (MIMO) in a wireless communication system, wherein a method comprises receiving, from a network node, a first parameter indicating MIMO layers with a value above four and a second parameter indicating Uplink (UL) skipping, receiving a first UL grant and a second UL grant on a first Physical Downlink Control Channel (PDCCH), wherein the first UL grant is for a retransmission of a first Medium Access Control (MAC) Protocol Data Unit (PDU) and the second UL grant is for a first new transmission, generating a second MAC PDU corresponding to the second UL grant indicated by the first PDCCH if the first MAC PDU is to be retransmitted for the first PDCCH, wherein there is no data available for transmission or for any Logical Channel Group (LCG), and performing the retransmission for the first MAC PDU using the first UL grant, and the first new transmission for the second MAC PDU using the second UL grant.