LTE Multicast Feedback via Correlated Uplink Resource Segmentation
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Solution Overview
Problem
Conventional wireless communication systems, particularly LTE networks, face challenges in providing effective feedback for un-received or indecipherable blocks of transmission data, leading to limited reliability and increased interference due to lack of efficient channel information feedback mechanisms.
Innovation Solution
The method involves correlating blocks of downlink transmission resources with blocks of uplink transmission resources during scheduling, allowing terminal devices to transmit feedback messages, such as negative acknowledgments, to indicate data loss, and employing probability factors to limit simultaneous responses and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback messages are transmitted by terminal devices to indicate un-received data blocks, then data transmission reliability is improved, but interference increases due to simultaneous responses from multiple devices
Solution Approach 1:
The patent segments the feedback transmission by correlating specific downlink resource blocks with specific uplink resource blocks. Terminal devices transmit feedback only on their assigned uplink resource blocks, dividing the feedback channel into multiple segments that reduce simultaneous transmissions and interference.
Solution Approach 2:
The network device performs preliminary scheduling by pre-establishing correlations between downlink and uplink resource blocks before data transmission. This preliminary action assigns specific feedback channels to terminal devices, preventing random simultaneous transmissions and reducing interference.
2Reliability
If channel information feedback mechanisms are implemented, then transmission reliability is improved, but system complexity increases due to scheduling and correlation management
Solution Approach 1:
The patent implements self-service through automatic correlation between downlink and uplink resource blocks. The system automatically schedules feedback channels based on pre-established correlations, reducing manual configuration complexity while maintaining reliable feedback transmission.
3Loss of information
If multiple terminal devices transmit feedback simultaneously, then comprehensive data loss reporting is improved, but interference increases reducing feedback quality
Solution Approach 1:
The patent segments the feedback transmission medium by assigning different uplink resource blocks to different terminal devices or device groups. This segmentation allows multiple devices to report data loss simultaneously without interference, as each device transmits on its dedicated segmented channel.
Solution Approach 2:
The patent introduces an additional dimension for feedback transmission by using multiple uplink resource blocks across different time-frequency resources. This dimensional expansion allows parallel feedback transmissions from multiple devices without mutual interference.
Data Source
AI summary
Facilitating feedback to a third generation partnership project (3GPP) long term evolution (LTE) or subsequent network is described herein. By way of example one or more blocks of downlink transmission resources (e.g., downlink channel) can be correlated to one or more blocks of uplink transmission resources (e.g., uplink channel) during scheduling of a transmission allocation period. For instance, the correlation can identify to terminal devices a particular uplink channel that can be used to transmit, among other things, a negative acknowledgement (NACK) related to a particular downlink channel. Additionally, multiple uplink resources can be employed to facilitate a quantitative and/or qualitative determination of severity of data loss. Furthermore, a limiting factor can reduce a number of terminal devices responding to lost data simultaneously, reducing feedback interference. As described, the subject innovation can provide for dynamic and/or static feedback in LTE networks to ensure robust service transmissions for such networks.