Mobile communication system and a control unit of the system for efficient use of vacant channels in one-way communication
US6735446B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Aug 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a mobile communication system, a central control unit assigns pairs of upstream and downstream channels to mobile station units located in a radio zone of a base station unit to carry out a two-way communication between the mobile station units, and the central control unit assigns pairs of upstream and downstream channels to the mobile station units to carry out a one-to-multiple group communication between the mobile station units. A memory unit stores vacant channel data indicative of the presence of a vacant channel with respect to the group communication carried out by the channel assignment of the central control unit. A broadcast message unit transmits a broadcast message containing the vacant channel data, stored in the memory unit, to each of the mobile station units. A message receiving unit receives the broadcast message transmitted by the broadcast message unit. A call request transmission unit transmits, when the vacant channel data of the received message indicates the presence of the vacant channel, a call request for a one-way communication using the vacant channel, to the base station unit. The central control unit assigns the vacant channel to one of the mobile…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.