Systems and methods for reduced forward link power control delay
AssigneeEricsson Inc.
InventorEssam Sourour
Life of this patent
Estimating the term…
Abstract
A communication system includes a mobile terminal and a base station. The mobile terminal estimates signal quality of a forward link during a first power control group period and determines a power control bit based on the estimated signal quality. The mobile terminal further transmits the power control bit on a reverse link during the first power control group period. The base station receives the power control bit on the reverse link and modifies forward link power based on the power control bit at commencement of a second power control group period.
Claims17
A method for controlling transmission power of signals transmitted between first and second radio communication devices, comprising:
- estimating a quality of signals transmitted from the first radio communication device to the second radio communication device during a first power control group period (T1);
- determining at least one power control bit based on the estimated signal quality;
- transmitting the at least one power control bit from the second radio communication device to the first radio communication device during the first power control group period (T1);
- receiving the at least one power control bit at the first radio communication device;
- and
- modifying transmission power of signals transmitted from the first radio communication device to the second radio communication device based on the at least one power control bit at commencement of a second power control group period (T2).
A method of facilitating forward link power control, comprising:
- estimating a propagation channel Doppler frequency;
- selecting either a first process or a second process based on the estimated Doppler frequency;
- determining a power control bit for controlling forward link power using the selected process;
- estimating signal quality of a forward link during a first power control group, the first power control group associated with a first power control group period (T1), wherein the signal quality of the forward link is estimated over a first time period (test1) and wherein the first time period (test1) is less than (T1);
- determining the power control bit based on the estimated signal quality;
- and
- wherein the first time period test1≦T1−Δt, where Δt comprises at least a reverse link propagation delay.
A method of controlling forward link power, comprising:
- estimating signal quality of a forward link during a first power control group period (T1);
- determining at least one power control bit based on the estimated signal quality;
- transmitting the at least one power control bit on a reverse link during the first power control group period (T1);
- receiving the at least one power control bit on the reverse link;
- and
- modifying forward link power based on the at least one power control bit at commencement of a second power control group period (T2).
A communication system, comprising:
- a mobile terminal that:
- estimates signal quality of a forward link during a first power control group period (T1),
- determines at least one power control bit based on the estimated signal quality,
- transmits the at least one power control bit on a reverse link during the first power control group period (T1);
- and
- a base station that:
- receives the at least one power control bit on the reverse link, and
- modifies forward link power based on the at least one power control bit at commencement of a second power control group period (T2).
Dependencies are inferred from the claim text.