Multi-RAT UE Signal Switching via Beacon Capability Detection
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Solution Overview
Problem
Conventional multi-RAT wireless communication systems cannot simultaneously transmit and receive data through multiple radio access technologies, leading to inefficient network performance due to lack of interworking between wireless LAN and cellular networks, and limited control over radio access technologies, resulting in suboptimal data switching between communication systems.
Innovation Solution
A method for a user equipment (UE) to receive and transmit signals by switching between communication systems based on signal quality and availability, using information from adjacent base stations to determine the capability of each system for downlink or uplink transmission, allowing the UE to associate with the appropriate system for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-RAT UE accesses multiple RATs simultaneously, then network efficiency and data transfer capability are improved, but device complexity and control mechanism requirements increase
Solution Approach 1:
The patent introduces a network controller as an intermediary entity that centrally manages and coordinates multiple RATs. The controller receives capability information from the UE and makes intelligent decisions about which RAT to use for data transmission, thereby simplifying the overall system control while enabling simultaneous access to multiple RATs. This mediator approach resolves the contradiction by centralizing control complexity in a dedicated network entity rather than distributing it across the UE and multiple RAT interfaces.
2Productivity
If the UE switches between communication systems based on signal quality, then network efficiency is improved, but the complexity of signal quality monitoring and system switching increases
Solution Approach 1:
The patent implements preliminary action by having the network controller pre-establish capability information about the UE's supported RATs and their respective signal quality characteristics. This pre-configured information allows the controller to make proactive switching decisions based on predicted network conditions rather than reactive responses to degraded signal quality. The UE and network entities exchange capability information in advance, enabling efficient system switching without requiring complex real-time monitoring and decision-making mechanisms at the UE side.
Data Source
AI summary
A user equipment in a communication environment in which a plural communication systems interwork comprises: a processor for searching a base station of a first communication system, the base station having a signal intensity higher than a threshold; and a receiver for receiving information of a base station list of a second communication system adjacent to the terminal through a first communication system link from the searched base station of the first communication system, wherein the processor turns on a second communication system mode in the case of failing in random access channel (RACH) transmissions a predetermined number of times to the searched base station of the first communication system, wherein the receiver receives a beacon signal including an indicator which indicates support of an uplink transmission of the first communication system from base stations included in the information of the base station list of the second communication system; the processor recognizes that an uplink transmission is disabled or only a downlink transmission is enabled through the first communication system link based on the beacon signal; and the information of the base station list of the second communication system may include an indicator which indicates whether the base station of the second communication system supports a downlink (DL) or uplink (UL) transmission through the first communication system link.