Uplink Device Aggregation via Primary UE Relay for Lower Latency
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing uplink data traffic for user equipment devices, particularly in scenarios where devices are beyond the coverage of the radio access network, leading to increased power consumption and latency in sidelink communications.
Innovation Solution
A method for user equipment devices to form aggregation groups, where a primary user equipment transmits uplink aggregation requests and grants to other devices, optimizing the use of uplink resources and reducing power consumption through coordinated beam management and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment devices transmit individual uplink requests separately, then each device can establish RRC connection independently, but power consumption increases and latency increases for devices beyond RAN coverage
Solution Approach 1:
The patent combines multiple individual uplink requests from different user equipment devices into a single aggregated uplink request. The primary user equipment collects uplink requests from multiple secondary devices and transmits them together in one message to the RAN node, reducing the number of transmissions and improving power efficiency while maintaining connection establishment reliability.
Solution Approach 2:
The primary user equipment acts as an intermediary between secondary user equipment devices and the RAN node. It receives uplink requests from secondary devices, aggregates them, and transmits the combined request to the RAN, eliminating the need for each secondary device to communicate directly with the RAN and reducing overall power consumption.
2Reliability
If user equipment devices transmit individual uplink requests separately, then each device can establish RRC connection independently, but latency increases for devices beyond RAN coverage
Solution Approach 1:
The patent combines multiple individual uplink requests from different user equipment devices into a single aggregated uplink request. The primary user equipment collects uplink requests from multiple secondary devices and transmits them together in one message to the RAN node, reducing the number of transmissions and improving power efficiency while maintaining connection establishment reliability.
Solution Approach 2:
The primary user equipment performs preliminary actions by collecting and aggregating uplink requests from secondary devices before transmitting to the RAN. This pre-aggregation reduces the total number of transmission rounds required, thereby reducing latency for devices beyond RAN coverage.
3Productivity
If uplink resources are allocated to each device individually, then each device can transmit independently, but resource utilization efficiency decreases
Solution Approach 1:
The patent merges individual uplink resource allocations into a single aggregated allocation. The RAN node allocates uplink resources to the primary user equipment for aggregated transmission, and the primary device distributes these resources to secondary devices, simplifying resource management while improving utilization efficiency.
Solution Approach 2:
The primary user equipment serves multiple functions: it acts as a secondary device for its own communication needs and simultaneously serves as a relay/aggregator for multiple other secondary devices. This multi-functionality enables efficient resource utilization by consolidating resource allocation through a single point of contact with the RAN.
Data Source
AI summary
A primary user equipment transmits an aggregated connection request message to a serving radio access network node requesting uplink connection information corresponding one or more user equipment of an aggregation group. The node determines and transmits to the primary user equipment uplink connection information for user equipment of the aggregation group to use in establishing a connection to the node. The primary user equipment transmits, individually, respective uplink connection information to the secondary user equipment devices. A primary user equipment may aggregate uplink traffic received from secondary user equipment along with multiple medium access control control elements into an aggregation payload message and transmit the aggregation payload message in a single transport block to the node.