Mobile communication system, transmission mode switching method, and recording medium having transmission mode switching method recorded thereon
US7050761B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2002 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Nov 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To provide a mobile communication system capable of easily performing selection of an optimal transmission mode. Upon receiving a receiving error notice from a mobile station, a transmission mode switching selecting portion of a base station forwards an instruction to switch a transmission mode to a mode slower than a current transmission mode to a modulation/coding portion. After receiving the receiving error notice, if the receiving error notice is not continuously received for a predetermined number of blocks Ns, the transmission mode switching selecting portion forwards an instruction to switch a transmission mode to a mode faster than the current transmission mode to the modulation/coding portion. The modulation/coding portion switches the modulation/coding code to any one of a QPSK modulation/coding circuit, a 16QAM modulation/coding circuit and a 64QAM modulation/coding circuit in response to the switching instruction and performs modulation/coding in the circuit switched to.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.