Direct UE-to-UE Sidelink Links for Delay and Interference Control
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Solution Overview
Problem
In wireless communication systems like 5G, direct communications between nearby user equipment (UEs) can consume significant network resources and incur undesirable delays due to reliance on base station traversal.
Innovation Solution
UEs form groups for sidelink communications, utilizing conflict avoidance strategies to mitigate interference and optimize resource usage by transmitting conflict avoidance signals and feedback to manage sidelink and uplink/downlink resource conflicts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs communicate through base station traversal, then network resource usage increases and communication delays increase, but communication reliability is maintained
Solution Approach 1:
The patent extracts the communication path from the base station traversal route and establishes a direct UE-to-UE sidelink. By taking out the intermediate base station nodes from the communication path, the system achieves direct peer-to-peer communication, eliminating the delays and resource consumption associated with base station traversal while maintaining communication reliability through direct link establishment.
Solution Approach 2:
The patent introduces group establishment as an intermediary mechanism to enable direct sidelink communication. UEs form communication groups and establish direct links within these groups, using the group structure as a mediator to organize and manage direct communications. This intermediary group structure allows UEs to communicate directly without base station traversal while maintaining network-managed reliability.
2Loss of energy
If direct sidelink communication is established, then network resource consumption decreases and communication delay decreases, but interference management complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where UEs report channel conditions, interference levels, and communication quality metrics to the network. This feedback enables the base station to monitor and manage sidelink communications, adjust resource allocations, and coordinate interference mitigation strategies, thereby managing the complexity of direct communications through network-based control loops.
Solution Approach 2:
The patent employs dynamic resource allocation and adaptive modulation for sidelink communications. Resource allocations, power levels, and communication parameters are adjusted dynamically based on channel conditions, interference levels, and communication requirements. This dynamic approach allows the system to optimize performance and manage interference adaptively rather than through static complex configurations.
3Productivity
If group formation for sidelink communication is implemented, then communication efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent merges group establishment signaling with existing uplink communication procedures. By combining sidelink group setup messages with regular uplink data or control transmissions, the system reduces the need for separate dedicated signaling channels. This merging approach enables group formation and management to occur using already-allocated uplink resources, thereby reducing overall signaling overhead while maintaining communication efficiency.
Data Source
AI summary
Some aspects described herein relate to receiving, from a base station, a configuration to transmit uplink signaling to the base station, determining, based on the configuration, to setup a group for sidelink communication with one or more other user equipments (UEs), transmitting, based on determining to setup the group, a first uplink message based on the configuration from the base station, and receiving, from the one or more other UEs, a second uplink message based on the configuration to indicate setup of the group. Some aspects described herein also relate to conflict avoidance between sidelink and uplink/downlink communications.