Multicast Scheduling Across Non-Contiguous Frequency Resources
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communications systems, particularly in MBSFN deployments, do not efficiently utilize non-contiguous frequency resources for broadcast and multicast services, leading to unutilized resources, increased latency, and decreased throughput.
Innovation Solution
Implementing a method and apparatus for wireless communications that allow configuration of broadcast and multicast services across multiple sets of frequency resources, including non-contiguous segments, through the transmission of multicast scheduling information indicating frequency resources and semi-persistent scheduling, enabling carrier aggregation and channel bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If MBSFN deployments are limited to a single contiguous segment of frequency resources, then system configuration is simplified, but frequency resource utilization efficiency deteriorates
Solution Approach 1:
The patent divides frequency resources into multiple separate segments (first frequency resources and second frequency resources) that can be independently configured and scheduled. This allows the system to utilize non-contiguous frequency segments without requiring a single large contiguous block, thereby improving resource utilization efficiency while maintaining manageable configuration complexity through separate scheduling mechanisms.
2Loss of energy
If multiple sets of frequency resources are configured for broadcast and multicast services, then frequency resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The patent employs semi-persistent scheduling where multicast scheduling information is transmitted in advance to configure UEs with multiple frequency resource sets before actual service delivery. This preliminary configuration allows the UE to store and manage multiple frequency resources without requiring complex real-time processing, thus improving resource utilization while controlling system complexity through advance scheduling decisions.
3Productivity
If carrier aggregation and channel bonding are enabled for MBSFN, then throughput is improved, but backward compatibility deteriorates
Solution Approach 1:
The patent implements a dynamic scheduling mechanism where the base station can flexibly select between single-frequency transmission and multi-frequency carrier aggregation based on network conditions and UE capabilities. The semi-persistent scheduling allows the system to adaptively enable or disable carrier aggregation features without requiring permanent configuration changes, thus improving throughput when beneficial while maintaining backward compatibility with legacy single-frequency deployments.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, a base station may transmit system information indicating multiple multicast-broadcast network areas, and may further provide configuration information for each multicast-broadcast network area indicating a location of multicast scheduling information (MSI). The MSI may include an indication of frequency resources on which to receive broadcast or multicast services. The MSI may indicate specific services for an multicast-broadcast network area that are provided via the different frequency resources (for example, different cells, carriers, channels, among other examples). In some examples, the base station may schedule broadcast or multicast services across frequency resources via semi-persistent scheduling. The MSI may indicate a redundancy version configuration (for example, time and frequency patterns for combined redundancy version broadcast transmissions).