IAB Sidelink Control via Central Unit Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink communications within integrated access and backhaul (IAB) networks, particularly in selecting the appropriate distributed unit (DU) for UE to control sidelink communications effectively.
Innovation Solution
The described techniques involve a central unit (CU) selecting a DU of an IAB node to control sidelink communications for user equipment (UE), determining a configuration of sidelink parameters that includes identification information for the selected DU, and transmitting this configuration to the IAB node. The DU then identifies the selected DU and provides an indication to the UE, which uses that DU for sidelink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the CU selects a DU to control sidelink communications, then the control reliability of sidelink communications is improved, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent introduces an intermediary mechanism where the CU selects a specific DU to control sidelink communications. The CU transmits configuration information including the selected DU's identification to the IAB node, which then forwards this information to the UE. This intermediary selection process ensures that the UE connects to the appropriate DU for sidelink communications, improving control reliability while managing system complexity through structured information flow.
2Measurement precision
If the CU transmits configuration information including DU identification to the IAB node, then the UE can use the appropriate DU for timing synchronization, but the signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by having the CU determine and transmit the configuration information including the selected DU's identification to the IAB node before the UE establishes sidelink communications. This advance configuration ensures that the UE receives accurate timing synchronization information from the correct DU, improving measurement precision while managing signaling overhead through efficient information transmission.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A base station (e.g., a central unit (CU) function of the base station) may select, from a set of distributed units (DUs) associated with the CU, a DU of an integrated access and backhaul (IAB) node to control sidelink communications for a user equipment (UE). The base station may determine a configuration of sidelink parameters for the sidelink communications with the UE, the sidelink parameters comprising an identification of the selected DU. The base station may transmit, to the TAB node performing sidelink communications with the UE, an indication of the configuration of sidelink parameters for the sidelink communications.