Method and apparatus for group calls in a wireless CDMA communication system
US6178166A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for group calls in wireless CDMA communication systems, addressing the need for reliable and efficient reverse power control in CDMA group calls. A communication infrastructure (108-110) upon receiving a group call request from a communication unit (e.g., 103), allocates a single voice channel (e.g., 120-121) in each cell that provides service to one or more communication units of the group (101). The communication infrastructure further allocates a reverse power control channel (e.g., 125-127) to each communication unit of the group. Thus, each communication unit of the group receives voice information for the group call via the voice channel in that communication unit's site or cell, and each communication unit receives inbound (i.e., reverse) power control information via the reverse power control channel allocated to that communication unit. In this manner, the present invention efficiently provides reverse power control information to multiple communication units and, therefore, facilitates the establishment of group calls in CDMA systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.