Controlling power and access of wireless device to base stations which use code division multiple access
First Claim
1. A base station for controlling access by wireless devices of mixed types to an uplink frequency channel comprising:
- a transmitting antenna;
a receiving antenna;
a despreader which receives a composite spread signal from the receiving antenna and uses unique codes to partially despread the composite spread signal, each unique code corresponding to a particular wireless device;
a first processor for determining the type of each particular wireless device; and
a second processor for updating a current load value and a population value for each type of wireless device, the second processorstoring the current load values and population values for each type of wireless device;
determining a current load share for each type of wireless device;
determining a population share for each type of wireless device; and
determining an equivalent current load value and an equivalent population value for all types of wireless devices admitted by the base station, wherein the equivalent current load value is proportional to the sum of the current load shares and the equivalent population value is proportional to the sum of the population shares, andwherein indicia of the equivalent current load value and the equivalent population value are sent to the transmitting antenna for transmission to wireless devices.
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Accused Products
Abstract
The invention relates to the use of CDMA techniques. Data signals to be transmitted from a plurality of wireless devices are spread across a common bandwidth. The data signals are received by a base station as a composite spread signal. The base station partially despreads the composite spread signal with unique codes to extract data signals from individual wireless devices. The data rate and quality of service requirements for each wireless device are used to calculate a power factor and a control signal is sent to control the power from a particular wireless device. In addition, a probability of transmission value is calculated based on an equivalent current load value and an equivalent population value. The probability of transmission value determines whether a particular wireless device is allowed access to an uplink frequency channel.
27 Citations
15 Claims
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1. A base station for controlling access by wireless devices of mixed types to an uplink frequency channel comprising:
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a transmitting antenna; a receiving antenna; a despreader which receives a composite spread signal from the receiving antenna and uses unique codes to partially despread the composite spread signal, each unique code corresponding to a particular wireless device; a first processor for determining the type of each particular wireless device; and a second processor for updating a current load value and a population value for each type of wireless device, the second processor storing the current load values and population values for each type of wireless device; determining a current load share for each type of wireless device; determining a population share for each type of wireless device; and determining an equivalent current load value and an equivalent population value for all types of wireless devices admitted by the base station, wherein the equivalent current load value is proportional to the sum of the current load shares and the equivalent population value is proportional to the sum of the population shares, and wherein indicia of the equivalent current load value and the equivalent population value are sent to the transmitting antenna for transmission to wireless devices. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling access to an uplink frequency channel of a base station by wireless devices of mixed types comprising:
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receiving a composite spread signal corresponding to a plurality of wireless devices; partially despreading by the use of unique codes the composite spread signal, each unique code corresponding to a particular wireless device; determining the type of each particular wireless device; updating and storing a current load value and a population value for each type of wireless device; determining a current load share for each type of wireless device; determining an equivalent current load value for all wireless devices admitted at a base station, the equivalent current load value being proportional to the sum of the current load shares of each type of wireless device; determining a population share for each type of wireless device; determining an equivalent population value for all wireless devices admitted at the base station, the equivalent population value being proportional to the sum of the population shares; and transmitting indicia of the equivalent current load value and the equivalent population value to wireless devices. - View Dependent Claims (7, 8, 9, 10)
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11. A wireless device comprising
a receiving antenna to receive a data signal transmitted from a base station for prioritizing access to the base station, the receiving antenna producing an output signal on an output; -
a transmitting antenna having an input; a bandpass filter having an input and an output, the input connected to the output of the receiving antenna; a demodulator having an input and an output, the input connected to the output of the bandpass filter; and a processor having an input connected to the output of the demodulator and an output connected to the input of the transmitting antenna, the processor receiving a control signal from the demodulator, said control signal derived from the data signal transmitted from the base station for prioritizing access; determining a probability of transmission value from the control signal; and using the probability of transmission value to determine whether data signals are transmitted from the transmitting antenna to the base station.
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12. A wireless device comprising
a receiving antenna having an output; -
a transmitting antenna having an input; a bandpass filter having an input and an output, the input connected to the output of the receiving antenna; a demodulator having an input and an output, the input connected to the output of the bandpass filter; and a processor having an input connected to the output of the demodulator and an output connected to the input of the transmitting antenna, the processor receiving a control signal from the demodulator, the control signal containing an equivalent load value and an equivalent population value for the base station; determining a probability of transmission value form the control signal based on the equivalent current load value and the equivalent population value; and using the probability of transmission value to determine whether data signals are transmitted from the transmitting antenna to a base station. - View Dependent Claims (13)
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14. A wireless device comprising
a receiving antenna having an output; -
a transmitting antenna having an input; a bandpass filter having an input and an output, the input connected to the output of the receiving antenna; a demodulator having an input and an output, the input connected to the output of the bandpass filter; and a processor having an input connected to the output of the demodulator and an output connected to the input of the transmitting antenna, the processor receiving a control signal from the demodulator; and determining a probability of transmission value from the control signal by extracting the probability of transmission value from the control signal. - View Dependent Claims (15)
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Specification