Relay UE Identifier Mapping for Wireless Data Forwarding
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Solution Overview
Problem
The management of different IDs in a Relay UE within wireless communication systems poses challenges, particularly in ensuring efficient communication and data forwarding between Relay UEs and the network, especially when RAT-specific identifiers differ from network-allocated identifiers.
Innovation Solution
A method is proposed to manage the relationship between RAT-specific remote UE identifiers and network-allocated remote UE identifiers by configuring a mapping table in the relay UE, allowing for correct forwarding of data packets between the relay UE and the network, and reducing signaling overhead by limiting the transmission of network-allocated identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mapping table is configured in the relay UE to manage different identifiers, then communication reliability is improved, but device complexity increases
Solution Approach 1:
A mapping table is introduced as an intermediary data structure in the relay UE to bridge the gap between different identifier systems. The mapping table stores correspondence relationships between RAT-specific identifiers and network-allocated identifiers, enabling the relay UE to correctly forward packets between different network types without direct complexity in the network side.
2Reliability
If network-allocated identifiers are transmitted frequently, then communication reliability is improved, but energy consumption increases
Solution Approach 1:
The mapping table is pre-configured in the relay UE before actual data transmission occurs. By establishing the identifier correspondence relationships in advance, the relay UE can directly use the mapping table during packet forwarding without needing to repeatedly transmit or request network-allocated identifiers, thus reducing signaling overhead and energy consumption.
3Reliability
If identifier mapping is performed for all packet types, then communication reliability is improved, but processing time increases
Solution Approach 1:
The identifier mapping operation is applied selectively based on packet type characteristics. The relay UE determines whether a packet requires identifier mapping by examining its type (e.g., data packets versus control packets), and only performs the mapping operation for packets that need it, avoiding unnecessary processing for packets where the identifiers are already appropriate.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing management of different IDs in a Relay UE in wireless communication system, the method comprising: receiving information for mapping table between a set of first identifiers (IDs) and a set of second IDs from a network; receiving a UL packet, which is to be forwarded to the network, without a second ID from the remote UE identified by a first ID associated with the second ID according to the mapping table; adding the second ID associated with the first ID to the UL packet; and transmitting the UL packet with second ID to the network. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.