Preamble based uplink power control for LTE
First Claim
1. A method that facilitates generating a power control preamble for utilization in a wireless communication environment, comprising:
- receiving an uplink grant from a base station, the uplink grant being a first uplink grant after uplink inactivity;
transmitting a power control preamble to the base station with a power setting based on open loop power control;
receiving a power control command from the base station, the power control command adjusts the power setting; and
transmitting data to the base station with the adjusted power setting.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methodologies are described that facilitate utilizing power control preambles with closed loop power control techniques in a wireless communication environment. An uplink grant can be transferred over a downlink (e.g., a first uplink grant after uplink inactivity), and a power control preamble can be sent over an uplink in response to the uplink grant. According to an example, transmission of the power control preamble can be explicitly scheduled and/or implicitly scheduled. The power control preamble can be transmitted at a power level determined by an access terminal utilizing an open loop power control mechanism. A base station can analyze the power control preamble and generate a power control command based thereupon to correct the power level employed by the access terminal. The access terminal can thereafter utilize the power control command to adjust the power level for uplink data transmission.
-
Citations
33 Claims
-
1. A method that facilitates generating a power control preamble for utilization in a wireless communication environment, comprising:
-
receiving an uplink grant from a base station, the uplink grant being a first uplink grant after uplink inactivity; transmitting a power control preamble to the base station with a power setting based on open loop power control; receiving a power control command from the base station, the power control command adjusts the power setting; and transmitting data to the base station with the adjusted power setting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A wireless communications apparatus, comprising:
-
a memory that retains instructions related to obtaining an uplink grant from a base station, the uplink grant being a first uplink grant after uplink inactivity, determining a power level for power control preamble transmission based upon an open loop evaluation, sending a power control preamble to the base station at the power level, receiving a power control command from the base station, altering the power level based upon the power control command, and sending an uplink data transmission to the base station at a power level that has been altered in accordance to the power control command; and a processor, coupled to the memory, configured to execute the instructions retained in the memory. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A wireless communications apparatus that enables utilizing power control preambles in a wireless communication environment, comprising:
-
means for obtaining an uplink grant, the uplink grant being a first uplink subsequent to uplink inactivity; means for transferring an uplink power control preamble at a power level selected as a function of an open loop power control estimate; means for obtaining a power control command that alters the power level; and means for transmitting uplink data at the altered power level. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
-
26. A machine-readable medium having stored thereon machine-executable instructions for:
-
obtaining an uplink grant, the uplink grant being a first uplink grant after uplink inactivity; transferring an uplink power control preamble at a power level selected as a function of an open loop power control estimate; obtaining a power control command that alters the power level; and transmitting uplink data at the altered power level. - View Dependent Claims (27, 28, 29, 30, 31, 32)
-
-
33. In a wireless communications system, an apparatus comprising:
a processor configured to; obtain an uplink grant from a base station, the uplink grant being a first uplink grant subsequent to uplink inactivity; determine a power level for power control preamble transmission based upon an open loop evaluation; send a power control preamble to the base station at the power level; receive a power control command from the base station; alter the power level based upon the power control command; and send an uplink data transmission to the base station at the altered power level.
Specification