Configured Grant Uplink Transmission with Transport Block Segmentation
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Solution Overview
Problem
The 5G wireless communication system faces challenges in maintaining adequate uplink coverage due to higher carrier frequencies, leading to coverage loss and requiring improved mechanisms for transport block processing and aperiodic channel state information multiplexing over multiple slots.
Innovation Solution
The implementation of configured grant-based transport block processing and aperiodic channel state information multiplexing mechanisms, including specific rules for termination of repetitions and resource allocation across multiple slots, to enhance uplink coverage and efficiency in 5G NR systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher carrier frequencies are used in 5G wireless communication, then data transmission capacity is improved, but uplink coverage is degraded
Solution Approach 1:
The transport block is segmented into multiple codeblock groups (CBGs) that can be transmitted separately across multiple slots. This segmentation allows the system to maintain higher data rates while improving coverage through repeated transmissions of critical data portions, resolving the contradiction between capacity and coverage.
Solution Approach 2:
The system performs preliminary encoding and segmentation of transport blocks into codeblock groups before transmission. This preliminary action enables flexible repetition strategies where critical CBGs can be repeated across slots to ensure coverage, while non-critical CBGs can be transmitted once at higher rates, balancing capacity and coverage requirements.
2Reliability
If transport block processing is extended over multiple slots, then uplink coverage is improved, but transmission latency is increased
Solution Approach 1:
The system dynamically determines the number of slots required for TB processing and the repetition factor based on channel conditions, coverage requirements, and latency constraints. This dynamic adaptation allows the system to extend processing over multiple slots when coverage is critical while minimizing latency when conditions permit faster transmission.
Solution Approach 2:
Different codeblock groups within the same transport block can have different repetition factors and slot allocations based on their importance and error probability. Critical CBGs receive more repetitions across slots for reliable delivery, while less critical CBGs are transmitted with fewer repetitions, optimizing the balance between coverage and latency for different data portions.
3Productivity
If aperiodic channel state information is multiplexed with transport block, then resource utilization is improved, but processing complexity is increased
Solution Approach 1:
Aperiodic channel state information (CSI) is merged with the transport block data in the same uplink transmission resources. This combining allows simultaneous transmission of both data and channel feedback, improving resource utilization by eliminating separate feedback transmissions while the structured multiplexing approach manages processing complexity through standardized encoding procedures.
Data Source
AI summary
Various embodiments herein provide techniques related to identifying, when a user equipment (UE) is in a fifth generation (5G) or new radio (NR) cellular network, a data that is to be transmitted in a transport block over multiple slots (TBoMS) in a configured grant (CG) physical uplink shared channel (PUSCH); identifying, based on an indication received from a base station, a number of repetitions for transmission of the PUSCH; and transmitting, based on the indication, the TBoMS in the PUSCH over the multiple slots. Other embodiments may be described and/or claimed.