Radio Identity Transfer for Seamless Wireless Handovers
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Solution Overview
Problem
Current wireless communication networks face challenges in managing mobility and handovers, particularly at cell boundaries where signal quality is reduced, and the increasing complexity of device-specific radio identities leads to interference issues due to the finite number of DeModulation Reference Signals (DMRS) available.
Innovation Solution
The temporary transfer of radio identities from one service area to another, with temporal and geographic limitations, is implemented to maintain default associations and prevent conflicting uses, allowing seamless handovers and load balancing while avoiding interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover procedures are implemented at cell boundaries, then mobile node mobility is supported, but signal quality deteriorates due to reduced signal strength from both source and target radio nodes
Solution Approach 1:
The source radio node transfers radio identities to the target radio node before the mobile node actually moves to the target cell. This preliminary transfer allows the target node to have the radio identities ready, enabling seamless handover without interruption to the mobile node's connection, thus maintaining signal quality while supporting mobility.
2Productivity
If device-specific radio identities (DMRS) are assigned to multiple users in the same cell, then network capacity increases, but interference increases due to the finite number of available DMRS sequences
Solution Approach 1:
The set of radio identities is segmented and distributed across multiple service areas or cells in the network. Each cell has its own subset of radio identities, which are transferred between cells through the invention's mechanism. This segmentation allows more users to be served across the network while maintaining sufficient unique identities per cell, thereby increasing overall network capacity while controlling interference within each cell.
3Ease of operation
If radio identities are transferred between service areas, then seamless handover is enabled, but the risk of conflicting radio identity usage increases
Solution Approach 1:
The source radio node receives feedback from the target radio node regarding the status of radio identity availability before transferring identities. This feedback mechanism ensures that the target node has the necessary identities and can properly accommodate them, preventing conflicts. The coordinated transfer process with feedback ensures seamless handover while maintaining reliability by avoiding identity conflicts.
Data Source
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AI summary
One aspect of the teachings herein involves the temporary transfer of radio identities from one service area of a wireless communication network to another service area, where the individual radio identities are used to differentiate individual radio connections between the network and respective wireless nodes supported by the network. In particular, the temporary transfer of a given radio identity from its default service area for use in another service is limited temporally and/or geographically. Limiting the temporal and/or geographic scope of the radio identity transfer allows the network to substantially maintain default associations of radio identities and their respective service areas, which allows the network to prevent or reduce the use of conflicting radio identities in the same service area. Transfer signaling may be used transfer radio identities, and such signaling may include the temporal and/or geographic restrictions, to control the migration or spread of borrowed identities in the network.