Sidelink Resource Allocation for 5G Wearable Devices
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR Things networks, there is a challenge in enabling efficient data exchange and synchronization among a large number of mobile and wearable devices operating in close proximity, especially when some devices are not connected to a network, requiring effective methods for sidelink communication and resource allocation.
Innovation Solution
The implementation of a method where network User Equipment (nUE) and wearable User Equipment (wUE) use Orthogonal Frequency Division Multiplexing (OFDM) communication signals over a multicarrier channel, with a time-frequency grid for resource allocation, allowing for sidelink communication through transmitter and receiver resource acquisition and sounding channels, and dynamic allocation of subframes as either downlink or uplink for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices communicate using traditional network connection methods, then network coverage and centralized control are improved, but device complexity and energy consumption increase for devices operating in close proximity
Solution Approach 1:
The patent segments the communication system into two distinct modes: network-connected communication (Xu-d interface) and direct sidelink communication (Xu-s interface). This segmentation allows devices to operate in close proximity using simplified direct communication protocols when network connection is unnecessary, reducing device complexity while maintaining reliable network coverage for devices that require centralized control
Solution Approach 2:
The patent creates a universal communication framework where User Equipment can perform both traditional network communication and direct sidelink communication. The UE is designed with multi-functionality to support both Xu-d and Xu-s interfaces, allowing seamless operation in different scenarios without requiring separate device types
2Productivity
If a large number of devices communicate in close proximity using sidelink, then communication efficiency is improved, but resource allocation and synchronization complexity increase
Solution Approach 1:
The patent introduces a control channel as an intermediary mechanism in sidelink communication. This control channel carries resource allocation information, synchronization signals, and coordination data between devices. By using this intermediary, devices can efficiently manage resources and maintain synchronization without requiring complex peer-to-peer negotiation protocols
Solution Approach 2:
The patent implements preliminary action by having devices perform resource acquisition and sounding channel operations before actual data transmission. This preliminary phase establishes resource allocations, synchronizes timing, and identifies available channels in advance, enabling efficient sidelink communication without real-time coordination complexity during data transfer
3Use of energy by moving object
If devices operate independently without network connection, then autonomy and energy consumption are improved, but coordination and synchronization capability deteriorate
Solution Approach 1:
The patent enables self-service operation through sidelink communication where devices autonomously manage their own communication resources, perform local resource allocation, and maintain synchronization without network assistance. This self-service capability allows devices to operate independently with reduced energy consumption while maintaining basic coordination functions
Solution Approach 2:
The patent implements feedback mechanisms in sidelink communication through acknowledgment channels and resource allocation responses. Devices provide feedback about received signals, resource availability, and synchronization status to peers, enabling autonomous coordination and maintaining synchronization capability without network connection
Data Source
AI summary
Embodiments of a network User Equipment (nUE), wearable User Equipment (wUE), and methods for sidelink communication are generally described herein. The nUE may transmit a control channel that allocates a subframe as either a downlink subframe or an uplink subframe for a sidelink communication between the nUE and a wearable User Equipment (wUE). When the control channel allocates the subframe as a downlink subframe, the nUE may contend for access to channel resources. The contention may include transmission of a transmitter resources acquisition and sounding (TAS) channel in a physical resource block (PRB) and an attempted detection of a receiver resources acquisition and sounding (RAS) channel from the wUE in the PRB. When the control channel allocates the subframe as an uplink subframe, the wUE may contend for access to the channel resources.