Wireless Resource Configuration for Sub-1ms Transmission Delay
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Solution Overview
Problem
The Long Term Evolution (LTE) protocol experiences significant transmission delays due to a round trip time (RTT) of at least 8 ms, which affects user experience and network performance, particularly in TDD systems where uplink and downlink transmissions occupy different subframes, leading to delays of 13 ms or 16 ms.
Innovation Solution
The implementation of resource configuration information to indicate a first transmission resource with a duration of less than 1 ms, allowing for shortened transmission delays, and the use of demodulation reference signals (DMRS) and uplink control channels to facilitate efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the minimum time unit for data transmission is set to 1 ms subframe as per LTE protocol, then the system maintains compatibility with existing LTE standards and ensures reliable processing, but the transmission delay increases to at least 8 ms round trip time
Solution Approach 1:
The patent segments the 1 ms subframe into smaller time units, introducing a shortened transmission time unit that occupies less than 1 ms. This segmentation allows data to be transmitted in smaller time intervals, reducing the round trip time from 8 ms to shorter durations while maintaining LTE compatibility through proper resource configuration.
Solution Approach 2:
The patent introduces dynamic resource configuration where the network device can flexibly allocate shortened transmission time units based on service requirements. The resource configuration information dynamically adjusts the time unit duration and allocation, enabling the system to adapt between standard 1 ms subframes and shortened time units to balance reliability and delay requirements.
2Adaptability or versatility
If TDD frame structure is used where uplink and downlink transmissions occupy different subframes, then the system achieves flexible resource allocation, but the round trip time increases to 13 ms or 16 ms
Solution Approach 1:
The patent segments the TDD frame structure by introducing shortened transmission time units within the existing uplink and downlink subframes. This allows the system to maintain the flexible resource allocation benefits of TDD while reducing the effective transmission time within each direction, thereby decreasing the overall round trip time from 13-16 ms to shorter durations.
Solution Approach 2:
The patent introduces a new time dimension by overlaying shortened transmission time units on top of the existing TDD subframe structure. This creates a multi-level time organization where the coarse-grained TDD subframes provide flexibility while the fine-grained shortened time units reduce delay, effectively adding a temporal dimension to the resource allocation hierarchy.
3Reliability
If multiple signaling interactions are performed in service transmission process, then the system ensures reliable communication protocols, but the delay from service initiation to transmission begins at least 8M ms where M is the number of interactions
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource allocation information and establishing shortened transmission time units before service initiation. This allows the system to have ready-to-use transmission resources prepared in advance, reducing the number of sequential signaling interactions needed during service setup and thereby decreasing the 8M ms delay to shorter durations.
Solution Approach 2:
The patent enables skipping of certain intermediate signaling steps by directly allocating shortened transmission time units through streamlined resource configuration. This rushes through the traditional multi-stage signaling process by consolidating resource allocation into fewer, more efficient steps, reducing the overall service initiation delay while maintaining protocol reliability.
Data Source
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AI summary
Embodiments of the present invention provide a wireless communications method and system, a network device, and user equipment. The method includes: sending, by a network device, resource configuration information to user equipment, where the resource configuration information is used to indicate a first transmission resource corresponding to first transmission, and duration of occupying a transmission resource by one transmission of the first transmission is less than 1 ms; and communicating, by the network device, with the user equipment based on the first transmission resource. In this way, a transmission delay can be shortened, user experience can be greatly improved, and performance of a wireless network can be greatly enhanced.