Wireless Transmission Point Change for Low Latency Handover
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency and fast transmission point changes due to long packet retransmission delays and radio link failures, especially in ultra-high frequency bands like mmWave, which affect data integrity and system performance for ultra-reliable and low-latency applications.
Innovation Solution
The method involves a wireless communication system that allows for dynamic transmission point changes and path switches by receiving transmission point change information from a gateway, enabling seamless data retransmission through alternative eNBs, thereby minimizing latency and data interruption during handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedures are used in wireless communication systems, then transmission reliability is maintained through established protocols, but handover interruption time increases and latency is elevated
Solution Approach 1:
The patent applies preliminary action by pre-configuring transmission point change information in the UE before handover is needed. The UE stores alternative transmission point information and can immediately switch to a pre-identified alternative transmission point when failure is detected, eliminating the need for lengthy handover decision and execution procedures. This resolves the contradiction by preparing the system in advance, reducing handover interruption time while maintaining reliability through pre-validated alternative paths.
Solution Approach 2:
The patent implements skipping by enabling the UE to directly switch transmission points without completing traditional handover procedures. When transmission failure is detected, the UE bypasses conventional handover steps (measurement reporting, handover command reception, random access) and immediately activates a pre-configured alternative transmission point. This rushes through the handover process, dramatically reducing interruption time while maintaining connection reliability.
2Loss of time
If fast transmission point change is implemented to reduce latency, then handover interruption time decreases, but system complexity increases due to additional path management requirements
Solution Approach 1:
The patent uses the network side (eNB/gateway) as an intermediary to manage the complexity of multiple transmission paths. The network pre-configures alternative transmission point information and maintains the path validity, offloading the complexity burden from the UE. The UE simply follows network-provided instructions, reducing its processing complexity while enabling fast transmission point changes. This resolves the contradiction by centralizing path management complexity in the network infrastructure.
Solution Approach 2:
The patent applies copying by creating redundant copies of transmission point information and path configurations in the UE. Instead of the UE performing complex real-time path analysis, it stores copied configuration data from the network and activates pre-copied alternative paths when needed. This copying approach simplifies UE complexity while enabling rapid transmission point switching, resolving the contradiction between fast handover and device complexity.
3Reliability
If data retransmission is performed through alternative eNBs, then data integrity is maintained during handover, but transmission overhead increases due to additional routing operations
Solution Approach 1:
The patent applies preliminary action by pre-establishing alternative transmission paths and configuring routing information before data transmission failures occur. When failure is detected, data can be immediately retransmitted through pre-configured alternative eNBs without requiring real-time path discovery or routing calculations. This reduces transmission overhead by eliminating redundant signaling and processing, while maintaining data integrity through pre-validated alternative paths.
Data Source
AI summary
Disclosed is a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G communication system, such as LTE. Disclosed is a method for receiving data in a wireless communication system, comprising the steps of: receiving, by a terminal, transmission point change information from a first base station connected to a gateway; receiving, by the terminal, the data transmitted from the gateway to the first base station through a second base station serving the terminal; and re-receiving, by the terminal, data, of which the transmission has failed, through a third base station according to a change of a transmission point from the second base station to the third base station on the basis of the transmission point change information, when data transmission from the second base station to the terminal has failed.