UE-to-UE Forwarding Routing Tables for Sidelink Range Extension
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Solution Overview
Problem
The existing wireless communication systems face limitations in implementing sidelink (SL) communication between user equipment (UEs) due to hardware capability constraints, communication distance limitations, and external interference.
Innovation Solution
A UE-to-UE forwarding system is introduced, where at least one forwarding UE is added between the sending UE and the receiving UE to facilitate communication. This system constructs routing tables for data transmission between the sending UE and forwarding UE, between forwarding UEs, and between the forwarding UE and the receiving UE to ensure effective data routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If SL communication is performed directly between UEs, then communication delay is reduced, but communication distance is limited due to hardware capability and external interference
Solution Approach 1:
The patent introduces forwarding UEs as intermediary nodes between sending and receiving UEs. These forwarding UEs relay data packets when direct SL communication is not feasible, thereby extending communication distance while maintaining the low-latency benefits of direct SL communication where possible. The network device coordinates these forwarding operations to ensure efficient data transmission.
2Length of stationary object
If forwarding UEs are introduced to extend communication distance, then communication range is improved, but system complexity increases due to routing table construction and management
Solution Approach 1:
The patent implements feedback mechanisms where forwarding UEs report their status, routing information, and channel conditions to the network device. The network device uses this feedback to optimize routing table construction, dynamically adjust forwarding paths, and manage the complexity of multi-hop SL communication. This feedback loop enables intelligent routing decisions without overwhelming system complexity.
3Reliability
If routing tables are constructed for UE-to-UE forwarding, then data transmission reliability is improved, but information overhead increases due to routing table exchange and maintenance
Solution Approach 1:
The patent designs routing tables with a universal structure that can serve multiple functions: path identification, forwarding decision making, and network management. The same routing table framework is used for both direct and indirect SL communication, reducing the need for separate information structures. This multi-functionality reduces information overhead while maintaining transmission reliability across different communication scenarios.
Data Source
AI summary
A communication method includes receiving a first packet from a second node, where the first packet includes an identifier of the second node, a first identifier, and an identifier of a receiving node; determining, based on the first packet, whether the first node is the receiving node; and determining a first routing table based on the first packet in response to a determination being made that the first node is not the receiving node, where the first routing table is used for data routing to the receiving node.