Performing power control in a mobile communications system
First Claim
1. A method of performing power control in a mobile communications system having a base station and a mobile unit, comprising:
- detecting an error in control signaling transmitted over a reverse link between the base station and the mobile unit when traffic channels are not being communicated in the reverse link; and
adjusting a power control element based on the detected error, wherein adjusting the power control element comprises adjusting a target ratio of energy per bit to noise spectral density based on the detected error in the control signaling.
1 Assignment
0 Petitions
Accused Products
Abstract
A mobile communications system includes base stations and mobile units. A power control scheme is provided in which a mobile unit can enter into a discontinuous transmission (DTX) mode. During DTX mode, the mobile unit is not transmitting traffic channels that can be monitored to determine frame errors so that the target ratio of energy per bit to noise spectral density (target Eb/No) can be adjusted. Instead, the base station monitors bit errors of bits in a pilot channel communicated by the mobile unit during DTX mode. Using this technique, the target Eb/No can be adjusted even when the mobile unit is not transmitting traffic channels, so that outer-loop power control can be performed. A number of mechanisms can also be used to detect when a mobile unit has entered DTX mode.
-
Citations
19 Claims
-
1. A method of performing power control in a mobile communications system having a base station and a mobile unit, comprising:
-
detecting an error in control signaling transmitted over a reverse link between the base station and the mobile unit when traffic channels are not being communicated in the reverse link; and
adjusting a power control element based on the detected error, wherein adjusting the power control element comprises adjusting a target ratio of energy per bit to noise spectral density based on the detected error in the control signaling. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An article comprising at least one storage medium containing instructions that when executed cause a system to:
-
detect an error in control signaling transmitted over a reverse link from a mobile unit when traffic is not being communicated in the reverse link; and
adjust a target ratio of energy per bit to noise spectral density based on the detected error in the control signaling. - View Dependent Claims (15, 16, 17)
-
-
18. A system for use in a communications system, comprising:
-
a receiver to receive control signaling from a mobile unit; and
a controller to;
detect an error in the control signaling received from the mobile unit in the reverse link when traffic is not being communicated from the mobile unit; and
adjust a target ratio of energy per bit to noise spectral density based on the detected error in the control signaling. - View Dependent Claims (19)
-
Specification