Group-Specific Shared-Channel Configuration for Reliable Multicast Downlinks
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Solution Overview
Problem
Existing wireless communications systems face inefficiencies and data loss when transmitting multicast data to groups of UEs using cell-specific or UE-specific configurations, leading to suboptimal communication between base stations and UEs.
Innovation Solution
Implementing a group-specific multicast/broadcast communication configuration that is independently configured from unicast and cell-specific configurations, allowing UEs to determine communication parameters such as time, frequency, and resource allocations for receiving multicast/broadcast signals, using group-specific RNTIs and default values when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell-specific or UE-specific configurations are used for multicast data transmission, then existing wireless communication protocols can be maintained, but data loss occurs and communication efficiency deteriorates
Solution Approach 1:
The patent segments the configuration approach by introducing a group-specific configuration that is distinct from both cell-specific and UE-specific configurations. This segmentation allows tailored parameter settings for multicast groups, improving reliability without compromising efficiency. The group-specific configuration enables independent optimization of multicast parameters such as time resource allocation, frequency resource allocation, and slot configuration.
Solution Approach 2:
The patent applies local quality by allowing different configuration parameters to be optimized specifically for multicast groups rather than using universal cell-specific or individual UE-specific settings. Each multicast group can have customized time, frequency, and resource allocations suited to their specific communication needs, thereby preventing data loss while maintaining high communication efficiency.
2Productivity
If group-specific multicast configuration is implemented, then communication efficiency and reliability improve, but system complexity increases
Solution Approach 1:
The patent achieves universality by designing a group-specific configuration framework that can serve multiple multicast groups with similar characteristics. The configuration structure is standardized and can be reused across different groups, reducing overall system complexity despite the added functionality. The same configuration parameters and procedures are applied universally to all multicast groups, making the system manageable.
Solution Approach 2:
The patent manages complexity through parameter changes by introducing configurable parameters that can be adjusted based on multicast group requirements. Key parameters include time resource allocation, frequency resource allocation, slot configuration, and resource mapping configuration. These parameters can be modified to suit different scenarios without fundamentally changing the system architecture, thereby improving efficiency while controlling complexity.
3Reliability
If independently configured multicast parameters are used, then data transmission reliability improves, but configuration overhead increases
Solution Approach 1:
The patent reduces configuration overhead by merging common parameters across multicast groups. Instead of configuring each parameter individually for every group, the system identifies and merges identical or similar parameters that apply to multiple groups. This consolidation maintains transmission reliability through proper configuration while significantly reducing the total quantity of configuration data that needs to be managed and transmitted.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine a group-specific multicast/broadcast communication configuration. The group-specific multicast/broadcast communication configuration may be independently configured from a unicast communication configuration and a cell-specific communication configuration. The UE may determine one or more multicast/broadcast communication parameters according to the group-specific multicast/broadcast communication configuration. The communication parameters may include a time resource allocation, a frequency resource allocation, a slot configuration, a downlink reference signal configuration and a resource mapping configuration for receiving multicast/broadcast downlink signals. The UE may receive multicast/broadcast downlink signals from the base station based on the one or more multicast/broadcast communication parameters.