Relay Wireless Device RRC Connection Procedures
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting a broad range of wireless devices with varying capabilities and power consumption levels, particularly in establishing and maintaining radio resource control connections, especially for low-cost and low-power devices, due to limitations in link budget and power constraints.
Innovation Solution
The implementation of techniques that allow remote wireless devices to use an intermediate relay wireless device to establish and manage radio resource control connections with a cellular base station, including relaying RRC messages and detecting link failures, to enhance the utility of low-cost and low-power devices by providing improved connectivity and handling link failures effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low-cost and low-power wireless devices directly establish RRC connections with cellular base stations, then device complexity and power consumption are reduced, but connection reliability and coverage are limited due to link budget constraints
Solution Approach 1:
The patent introduces a relay wireless device as an intermediary node between the remote wireless device and the cellular base station. The relay device receives RRC messages from the remote device and forwards them to the base station, and vice versa. This intermediary approach extends the communication range and improves connection reliability for low-power devices that would otherwise be unable to maintain direct connections due to link budget limitations.
2Adaptability or versatility
If remote wireless devices use intermediate relay devices to establish RRC connections, then connection coverage and reliability are improved, but device complexity and protocol handling requirements increase
Solution Approach 1:
The relay wireless device serves as a protocol intermediary that handles the complexity of RRC message routing, relay RRC message generation, and link failure detection. This allows remote devices to benefit from extended coverage without bearing the full protocol complexity burden, as the relay device manages these functions.
Solution Approach 2:
The patent segments the RRC connection establishment process into distinct phases: direct communication between remote and relay devices, relay message forwarding to base stations, and separate link failure detection mechanisms. This segmentation allows each component to be optimized independently, managing overall system complexity while maintaining adaptability.
3Adaptability or versatility
If relay wireless devices are introduced to extend connectivity, then support for diverse device capabilities is improved, but system complexity and message routing requirements increase
Solution Approach 1:
The relay wireless device is designed with multi-functionality to handle various RRC message types (setup, reconfiguration, release, etc.) and support different remote device capabilities. It can act as a universal intermediary for multiple remote devices and different base stations, managing diverse protocol requirements through a unified relay mechanism.
Data Source
AI summary
This disclosure relates to techniques for performing radio resource control procedures for remote wireless devices in a wireless communication system. A remote wireless device may transmit a radio resource control message that includes information configured to be relayed to a cellular base station to a relay wireless device, which may relay the information to the cellular base station. The cellular base station may also transmit a radio resource control message that includes information configured to be relayed to the remote wireless device to the relay wireless device, which may relay the information to the remote wireless device.