Relay Link Duplication for UE Network Access Reliability
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Solution Overview
Problem
Data transmission reliability is low when a User Equipment (UE) accesses a network through a relay due to the lack of a Packet Data Convergence Protocol (PDCP) retransmission mechanism in existing single-carrier links.
Innovation Solution
Transmitting duplicated data through multiple relays or a Uu interface with multiple relays to improve data transmission reliability by reducing transmission delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-carrier link is provided between the UE and the relay, then the device complexity is reduced, but the data transmission reliability deteriorates due to the inability to use PDCP retransmission mechanism
Solution Approach 1:
The patent segments the data transmission path into multiple independent relay links. Instead of using a single-carrier link, the UE establishes connections through multiple relays (first relay and second relay), creating separate transmission paths. This segmentation allows the system to maintain lower device complexity while improving reliability through path diversity, enabling PDCP retransmission mechanisms to function across multiple links.
Solution Approach 2:
The patent changes the transmission parameter from a single-carrier link to multi-carrier links through multiple relays. By modifying the link structure parameter from single-path to multi-path transmission, the system enables PDCP retransmission mechanisms while maintaining manageable device complexity through standardized protocol implementation.
2Reliability
If duplicated data is transmitted through multiple relays, then the data transmission reliability is improved, but the device complexity increases due to multiple connection management
Solution Approach 1:
The patent applies universality by making each relay node perform identical functions in the data transmission process. Both the first relay and second relay execute the same packet forwarding and PDCP operations, allowing the system to manage multiple connections through standardized procedures rather than complex individual configurations, thus improving reliability while controlling complexity.
3Reliability
If multiple relays are used for data transmission, then the data transmission reliability is improved, but the transmission delay increases due to additional routing hops
Solution Approach 1:
The patent applies preliminary action by pre-establishing multiple relay connections and configuring PDCP entities before data transmission begins. The UE and relays prepare the multi-path infrastructure in advance, including setting up bearers and routing configurations, so that when data needs to be transmitted, it can immediately utilize the pre-configured reliable paths without incurring additional setup delays.
Data Source
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AI summary
The present disclosure provides an information transmission method, a UE and a network device, so as to solve the problem that the data transmission reliability is low when the UE accesses a network through a relay. The information transmission method includes transmitting duplicated data to a network device through one of: N relays, where N is a positive integer greater than or equal to 2; or an air interface between the UE and the network device as well as M relays, where M is a positive integer greater than or equal to 1.