Method for handoff in mobile communication system
US7542765B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2006 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Nov 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a handoff method connected with resource allocation in order to prevent QoS degradation, which may occur during or before/after a handoff on account of channel state change resulting from the mobility of a radio communication apparatus. To this end, a serving base station currently-connected to the radio communication apparatus and a target base station to be connected after a handoff periodically or non-periodically measure uplink/downlink channel states in relation to the radio communication apparatus, and the target base station allocates resources (e.g., time slot, specific subcarrier, or specific frequency band) most suitable for the service requested from the radio communication apparatus during a handoff, thereby preventing QoS degradation due to the handoff. In addition, in the case of a radio communication apparatus using multiple antennas, the serving base station notifies the target base station of a multi-antenna operation mode in relation to the radio communication apparatus before finishing a handoff procedure, thereby minimizing QoS degradation due to the handoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.