MBMS Uplink Feedback Resource Allocation With Segmented Feedback Windows
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating uplink resources for multimedia broadcast multicast (MBMS) uplink feedback information, particularly in managing hybrid automatic repeat request acknowledgement/negative-acknowledgment (HARQ-ACK) and channel state information (CSI) feedback, leading to difficulties in retransmitting multimedia data when errors occur.
Innovation Solution
The proposed solution involves allocating uplink feedback channel resources, such as physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH), for user equipment (UE) to transmit MBMS-related feedback information, using configuration messages like SC-MCCH and RRC to manage resources efficiently, and configuring feedback windows for UE to determine resource units for transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink feedback channel resources are shared among multiple UEs for MBMS feedback, then resource utilization efficiency is improved, but resource contention and interference increase
Solution Approach 1:
The feedback window is divided into multiple resource units, and each UE is allocated specific resource units within the feedback window based on their feedback timing requirements. This segmentation allows multiple UEs to transmit feedback simultaneously without contention, as each UE occupies dedicated resource units within the shared feedback window.
Solution Approach 2:
The patent introduces a time-dimensional structure by defining feedback windows and resource units in the time domain. Instead of allocating resources only in frequency domain, the solution adds time dimension with structured feedback windows containing multiple resource units, enabling orthogonal resource allocation across time to reduce interference while maintaining high utilization.
2Object-affected harmful factors
If dedicated uplink feedback resources are allocated to each UE for MBMS feedback, then resource contention is reduced, but resource allocation complexity and overhead increase
Solution Approach 1:
The feedback window structure serves multiple functions: it provides dedicated resource allocation for each UE, enables efficient resource utilization through shared time resources, and simplifies scheduling by using a standardized template approach. The same feedback window structure can be reused for multiple UEs with different resource unit allocations, reducing overall system complexity.
Solution Approach 2:
The feedback window configuration, including resource unit definitions and allocations, is predetermined and configured in advance through RRC signaling. This preliminary configuration eliminates the need for dynamic resource allocation decisions during feedback transmission, reducing real-time scheduling complexity while ensuring dedicated resources for each UE.
3Adaptability or versatility
If feedback windows with multiple resource units are configured for UE, then uplink feedback transmission flexibility is improved, but configuration and management complexity increases
Solution Approach 1:
The patent enables flexible configuration of feedback window parameters such as window size, resource unit duration, and allocation patterns through RRC signaling. By changing these parameters adaptively based on traffic conditions and UE requirements, the system achieves high flexibility while managing complexity through standardized parameter sets and configuration templates.
Data Source
AI summary
The present disclosure describes methods, system, and devices for allocating uplink resource for multimedia broadcast multicast (MBMS) uplink feedback information. The method includes sending, by a radio access network (RAN) to at least one user equipment (UE), at least one multicast traffic channel (MTCH) transmission in a MBMS service. The method also includes allocating, by the RAN for the at least one UE, at least one resource for transmitting MBMS-related uplink feedback information corresponding to the at least one MTCH transmission.