Controlling mobile station response to a common rate control command
AssigneeAlcatel Lucent
InventorJung Ah Lee
Life of this patent
Estimating the term…
Abstract
A wireless communication system (20) includes an overload control technique that comprises selectively controlling whether a mobile station (30-40) will respond to a common rate control command. In a disclosed example, a statistical rate control is used such that each mobile station responds to the relative grant based upon a probability that the mobile station should respond. A disclosed example includes selecting two control parameters that influence the probability that a mobile station will respond. The probability in one example is dependent on the data rate currently being used by the mobile station when receiving the relative grant.
Claims11
A method of communicating, comprising:
- selectively controlling whether a mobile station will respond to a common rate control command that is transmitted to a plurality of mobile stations;
- and
- controlling a probability that the mobile station will respond to the common rate control command wherein the probability comprises
- P(r)=Kexp(−r/μ)−Kexp(−Rmax/μ),
- where
- r is an uplink data rate of the mobile station;
- Rmax corresponds to at least one uplink data rate associated with a response to the common rate control command;
- μ corresponds to a rate of controlling mobile stations using the common rate control command;
- and
- K=1/(1−exp(−Rmax/μ)).
A method of communicating, comprising:
- selectively controlling whether a mobile station will respond to a common rate control command that is transmitted to a plurality of mobile stations, wherein the common rate control command comprises a non-serving relative grant;
- and
- controlling a probability that the mobile station will respond to the common rate control command using the relationship
- P(r)=Kexp (−r/μ)+1−K
- where
- r is a data rate of the mobile station;
- μ is selected to control a rate at which mobile stations will respond;
- and
- K=1/(1−exp(−Rmax/μ)) where
- Rmax is indicative of at least one acceptance mobile station data rate.
A method of communicating, comprising:
- selectively responding to a common rate control command received at a mobile station;
- and
- determining a probability P for responding to the received common rate control command using the relationship:
- P(r)=Kexp(−r/μ)−Kexp(−Rmax/μ),
- where
- r is an uplink data rate of the mobile station;
- Rmax corresponds to at least one uplink data rate associated with a response to the common rate control command;
- μ corresponds to a rate of controlling mobile stations using the common rate control command;
- and
- K=1/(1−exp(−Rmax/μ)).
A method of communicating, comprising
- selecting a value for at least one parameter used for determining a probability that a mobile station will respond to a common rate control command;
- transmitting the selected value as part of the common rate control command;
- and
- the selected parameter comprises at least one of μ or Rmax and a probability P that a mobile station will respond to the common rate control command is determined by
- P(r)=Kexp(−r/μ)−Kexp(−Rmax/μ),
- where
- r is an uplink data rate of the mobile station;
- Rmax corresponds to at least one uplink data rate associated with a response to the common rate control command;
- μ corresponds to a rate of controlling mobile stations using the common rate control command;
- and
- K=1/(1−exp(−Rmax/μ)).
Dependencies are inferred from the claim text.