Uplink Grant Multiplexing for Delay Reduction
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Solution Overview
Problem
In LTE systems, the existing methods for multiplexing uplink grants lead to increased transmission delays for high-priority data due to random sequencing, causing inefficiencies in data transmission timing.
Innovation Solution
The proposed method groups uplink grants based on their sending moments to determine multiplexing resources, allowing the UE to adjust the multiplexing order and prioritize data transmission to avoid delays, ensuring timely delivery of high-priority data by categorizing and scheduling uplink grants according to their respective delays and priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE processes the received UL Grants within one same TTI according to a random sequence, then all uplink grants can be multiplexed in a unified manner, but high priority data may be multiplexed onto transport blocks with relatively long delays, increasing transmission delay of high priority data
Solution Approach 1:
The patent segments the multiplexing process into multiple rounds (first round resource allocation without partition, second round resource allocation with partition) and separates handling of different uplink grant types. High priority grants (PDCCH C-RNTI, SPS C-RNTI) are processed separately from low priority grants (RAR) in different multiplexing rounds, ensuring high priority data is not delayed by low priority traffic while maintaining organized unified multiplexing.
2Device complexity
If the UE multiplexes data onto transport blocks without considering sending moments, then the multiplexing process is simple, but the UE cannot judge delays of different uplink resources and adjust multiplexing order, causing delay increase for high priority data
Solution Approach 1:
The patent applies preliminary action by determining and recording the sending moments of transport blocks corresponding to each uplink grant before the multiplexing process. The UE calculates and stores the sending moment for each UL Grant in advance, then uses this pre-determined information to judge delays and adjust multiplexing order appropriately, avoiding delay increase for high priority data while keeping the multiplexing process manageable.
Data Source
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AI summary
The present invention discloses a data sending method and a user equipment, and relates to the field of mobile communications. The method includes: receiving at least two uplink grants allocated by a base station; grouping uplink grants received at different moments in the at least two uplink grants to obtain multiplexing resources; and multiplexing data to be sent onto transport blocks corresponding to the multiplexing resources and sending the transport blocks. The user equipment includes a receiving module, a processing module and a sending module. In embodiments of the present invention, uplink grants are grouped according to sending moments of transport blocks corresponding to the uplink grants so as to determine multiplexing resources, and data is multiplexed onto transport blocks corresponding to the grouped uplink grants and the transport blocks are sent, so that a UE can judge delays of different uplink resources according to the sending moments, and adjust a multiplexing order according to possible delays, so as to avoid an increase of delay when high priority data is transmitted.