Dynamic Transmission Configuration Group Activation via MAC CE
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing transmission configuration groups, particularly in activating and deactivating them dynamically to adapt to changing radio conditions and user equipment capabilities, which affects network performance and resource allocation.
Innovation Solution
The implementation of advanced radio access network architecture and protocol stacks that enable dynamic activation and deactivation of transmission configuration groups using MAC commands, incorporating features like CSI transmission, secondary cell activation, and Discontinuous Reception (DRX) timers, to optimize resource allocation and adapt to varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmission configuration groups are dynamically activated and deactivated to adapt to changing radio conditions, then network flexibility and resource allocation efficiency are improved, but system complexity and control overhead increase
Solution Approach 1:
The patent segments transmission configurations into separate Transmission Configuration Groups (TCGs), each containing a set of parameters (DMRS configuration, antenna ports, quasi-co-location indicators). This segmentation allows independent activation/deactivation of specific TCGs based on radio conditions, achieving adaptability while managing complexity through modular organization rather than monolithic reconfiguration.
Solution Approach 2:
The patent implements dynamic activation and deactivation of TCGs through MAC control elements that can be transmitted on downlink shared channels. The system transitions from static, pre-configured transmission parameters to dynamic, condition-based activation, allowing the network to adapt TCG availability in real-time based on radio conditions and user equipment capabilities.
2Productivity
If transmission configuration groups are dynamically activated and deactivated to optimize resource allocation, then network efficiency is improved, but control overhead and signaling complexity increase
Solution Approach 1:
The patent merges multiple transmission configuration parameters into unified TCG structures, combining DMRS configuration, antenna port assignments, and quasi-co-location indicators into a single activatable unit. This merging reduces the number of separate control signals needed compared to individually controlling each parameter, thereby reducing control overhead while maintaining allocation efficiency.
Solution Approach 2:
The TCG structure serves multiple functions simultaneously: it defines downlink reference signal configurations, antenna port mappings, and quasi-co-location relationships all within a single activatable group. This multi-functionality allows one control mechanism to achieve multiple optimization goals, reducing the cumulative overhead of separate control procedures.
3Adaptability or versatility
If dynamic activation and deactivation mechanisms are implemented, then resource allocation optimization is improved, but implementation complexity and protocol overhead increase
Solution Approach 1:
The patent configures multiple TCGs in advance during system setup or reconfiguration, preparing them for future activation. The network can then quickly activate or deactivate pre-configured TCGs based on changing conditions without needing to create and signal complete reconfiguration messages from scratch, reducing implementation complexity while maintaining optimization capability.
Data Source
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AI summary
A wireless device, being served by a plurality of TRPs comprising a first TRP and a second TRP, receives one or more messages comprising one or more configuration parameters. The one or more configuration parameters indicate a plurality of transmission configuration indication (TCI) states, and comprise at least one configuration parameter of a first downlink transmission group and a second downlink transmission group. The first downlink transmission group and the second downlink transmission group are corresponding to the first TRP and the second TRP. A medium access control control element (MAC CE) is received. The MAC CE comprises: a first field identifying one of the first downlink transmission group and the second downlink transmission group; and a second field activating one or more TCI states, of the plurality of TCI states, for a downlink transmission group identified by the first field. A downlink control information (DCI) scheduling a transport block is received. In response to receiving the DCI, the transport block based on a TCI state among the one or more TCI states of the downlink transmission group is received.