IAB Node Dual Connectivity Configuration via Capability Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively managing dual connectivity between communication nodes in an integrated access and backhaul (IAB) network, particularly due to resource collisions between different parent nodes.
Innovation Solution
A dual connectivity management method where a first communication node in an IAB network receives capability reports from lower nodes, identifies support for multi-TRP and intra-carrier DC functions, and configures dual connectivity schemes based on identified capabilities to avoid resource collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intra-band DC or intra-carrier DC is configured with different parent nodes to maintain multiple parent nodes for improving reliability, then reliability is improved, but resource collision occurs between different parent nodes
Solution Approach 1:
The patent applies preliminary action by having the first IAB node report its DC-related capability information (including intra-carrier DC support and multi-TRP function support) to the second communication node before dual connectivity configuration. This allows the network to pre-plan and configure appropriate DC schemes that avoid resource collisions while maintaining multiple parent nodes for reliability.
Solution Approach 2:
The patent utilizes parameter changes by configuring different DC schemes based on the capability parameters of the IAB node. When the IAB node supports intra-carrier DC and multi-TRP functions, the network can configure parameters to enable advanced DC modes that avoid resource collisions through coordinated resource allocation, thereby resolving the contradiction between reliability improvement and resource collision avoidance.
2Object-affected harmful factors
If capability reporting and configuration procedures are implemented to manage dual connectivity, then resource collision is avoided, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the IAB node to autonomously report its capability information regarding DC support (intra-carrier DC capability and multi-TRP function capability) to the network. This self-reporting mechanism reduces the need for complex network-side capability discovery procedures, thereby managing complexity while effectively preventing resource collisions through informed configuration.
3Productivity
If advanced DC schemes are configured based on multi-TRP and intra-carrier DC support, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by enabling flexible and adaptive DC configuration based on the reported capability parameters of the IAB node. The network can dynamically select appropriate DC schemes (such as utilizing intra-carrier DC with multi-TRP functions) according to the actual capabilities of each IAB node, thereby optimizing communication efficiency without imposing unnecessary complexity on nodes that do not support advanced features.
Data Source
AI summary
A DC management method, performed by a first communication node constituting an IAB network in a communication system, may comprise: receiving, from a first IAB node that is a lower node of the first communication node, a first capability report including information of DC-related capability of the first IAB node; based on the first capability report, identifying whether the first IAB node supports a multi-TRP function; based on the first capability report, identifying whether the first IAB node supports an intra-carrier DC; and based on the identified whether the first IAB node supports the multi-TRP function and whether the first IAB node supports the intra-carrier DC, configuring a DC for the first IAB node together with a second communication node that is an upper node of the first IAB node.