Intelligence in handover assessment for LTE/VoLTE calls to improve retainability
US9253704B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2014 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | Sep 25, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/305
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method to sustain an on-going voice call or other service during a handover, HO, by preventing the handover to a target cell that fails to admit all the mandatory Radio Access Bearers, RABs, as part of supporting one or more Quality of Service Class Identifiers, QCIs, associated with the ongoing service. When the source evolved Node B, eNB, prevents the HO to the best target cell, it may attempt the HO to the next best target cell. If the next best cell fails to admit all the mandatory RABs and if there are no other intra-LTE or inter-LTE cells available for HO, the source eNB may perform an inter-Radio Access Technology, RAT, HO using the Single Radio Voice Call Continuity, SRVCC, procedure. By preventing “partial” handovers, the retainability of an ongoing service is significantly improved. The target cells causing failure of particular RABs can be tracked using new counters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.