Duplex Information Exchange in Wireless Networks
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Solution Overview
Problem
Existing wireless communications systems face challenges in efficiently managing duplex information exchange between network entities and user equipment (UE), particularly in distributed deployment scenarios where duplex modes, frequency, and time information need to be effectively communicated and coordinated.
Innovation Solution
The described techniques involve a distributed unit (DU) transmitting backhaul signaling to a central unit (CU) with duplex information, which can include active duplex modes, frequency or time information, and random access channel configurations. This information can be forwarded to other network entities or directly to the UE, enabling multiple duplex configurations to be indicated and activated as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If duplex information is transmitted through multiple network entities (DU to CU to UE), then the flexibility and coordination of duplex mode management is improved, but the signaling overhead and system complexity increases
Solution Approach 1:
The network is segmented into distributed units (DU) and central units (CU) with distinct responsibilities. The DU handles duplex mode determination and transmits information to the CU, which then forwards to the UE. This segmentation allows flexible duplex management while distributing complexity across multiple specialized components rather than concentrating it in a single entity.
Solution Approach 2:
The central unit (CU) acts as an intermediary between the distributed unit (DU) and the user equipment (UE). The CU receives duplex information from the DU, processes it, and forwards it to the UE. This intermediary role enables coordinated duplex mode management across the network while maintaining clear separation of functions between network entities.
2Adaptability or versatility
If multiple duplex configurations are indicated to the UE, then the adaptability to different communication scenarios is improved, but the information exchange overhead increases
Solution Approach 1:
The network entities pre-determine and prepare multiple duplex configurations before transmission. The DU identifies suitable duplex modes in advance and transmits this information to the CU, which then includes it in the message to the UE. This preliminary preparation allows the UE to have multiple configurations available without requiring extensive real-time signaling exchanges.
Solution Approach 2:
The duplex information message structure is designed to be universal and multi-functional. It can carry information about multiple duplex modes (full-duplex, half-duplex, subband full-duplex) and various configurations within a single standardized message format. This universality allows the system to support multiple duplex configurations without requiring separate specialized signaling for each type.
3Reliability
If the CU forwards duplex information to another network entity for handover, then the coordination during handover is improved, but the information exchange time increases
Solution Approach 1:
The central unit (CU) proactively forwards duplex information to target network entities before handover is actually executed. By preparing and transmitting this information in advance, the target entity is already equipped with the necessary duplex configuration data when the handover occurs, reducing the time required for information exchange during the critical handover transition.
Solution Approach 2:
The system establishes feedback channels between network entities for duplex information exchange. When the CU forwards duplex information to another network entity, acknowledgment and status information are transmitted back to confirm successful reception and processing. This feedback mechanism ensures reliable handover coordination while minimizing delays through efficient information confirmation protocols.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques may enable a distributed unit (DU) to transmit backhaul signaling to a central unit (CU) indicating duplex information. For example, the duplex information may indicate an active duplex mode (e.g., subband full-duplex, subband half-duplex, or full-duplex), frequency or time information related to one or more duplex modes, or a random access channel (RACH) configuration that is specific to one or more duplex modes. In some examples, the CU may forward the duplex information to another CU or DU. Additionally, or alternatively, one or more network entities may transmit the duplex information to a user equipment (UE). For example, the one or more network entities may indicate multiple duplex configurations to the UE, and may transmit signaling activating one of the multiple duplex configurations.