EP0680159A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for controlling the transmission power of different types of wireless devices in a CDMA system
Assignee: AT&T Inc
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Filing: 1995-04-19
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Granted: —
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Expires: 2015-04-19
Abstract
Abstract The invention relates to the use of CDMA techniques. Data signals to be transmitted from a plurality of wireless devices (172,174,176,178,180) are spread across a common bandwidth. The data signals are received (via 114) by a base station (110) as a composite spread signal. The base station partially despreads (in 136) 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 (in 144) a power factor and a control signal is sent (via 152) 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.
Inventors
- 👤 Chih-Lin I
- 👤 Krishan Kumar Sabnani
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:20
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/26; H04W52/265; H04W52/267; H04W52/28; H04W52/288
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
67 words
A base station for controlling the power transmitted by wireless devices of mixed types comprising: a transmitting antenna; a receiving antenna; and a processor for receiving signals from the receiving antenna and for producing a control signal which is sent to the transmitting antenna, the control signal controlling the power transmitted to the base station by a particular wireless device based on the type of wireless device.
Claim 2
Dependent Claim
28 words
The base station of claim 1 wherein the type of the particular wireless device is at least partially defined by the data rate of the particular wireless device.
Claim 3
Dependent Claim
30 words
The base station of claim 1 wherein the type of the particular wireless device is at least partially defined by the quality of service requirement of the particular wireless device.
Claim 4
Dependent Claim
30 words
The base station of claim 2 wherein the type of the particular wireless device is at least partially defined by the quality of service requirement of the particular wireless device.
Claim 5
Dependent Claim
39 words
The base station of claim 2 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher data rates produce proportionately higher power levels at the base station receiving antenna.
Claim 6
Dependent Claim
41 words
The base station of claim 3 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher quality of service requirements produce proportionately higher power levels at the base station receiving antenna.
Claim 7
Dependent Claim
54 words
The base station of claim 4 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher quality of service requirements produce proportionately higher power levels and wireless devices with proportionately higher data rates produce proportionately higher power levels at the base station receiving antenna.
Claim 8
Independent Claim
55 words
A method for controlling the power transmitted by wireless devices of mixed types comprising: receiving a data signal from a particular wireless device; determining the type of the particular wireless device; and sending a control signal to control the power transmitted by the particular wireless device based on the type of the particular wireless device.
Claim 9
Dependent Claim
27 words
The method of claim 8 wherein the type of the particular wireless device is at least partially defined by the data rate of the particular wireless device.
Claim 10
Dependent Claim
29 words
The method of claim 8 wherein the type of the particular wireless device is at least partially defined by the quality of service requirement of the particular wireless device.
Claim 11
Dependent Claim
27 words
The method of claim 10 wherein the type of the particular wireless device is at least partially defined by the data rate of the particular wireless device.
Claim 12
Dependent Claim
39 words
The method of claim 9 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher data rates produce proportionately higher power levels as received at the base station antenna.
Claim 13
Dependent Claim
41 words
The method of claim 10 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher quality of service requirements produce proportionately higher power levels as received at the base station antenna.
Claim 14
Dependent Claim
61 words
The method of claim 11 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher quality of service requirements produce proportionately higher power levels as received at the base station antenna and wireless devices with proportionately higher data rates produce proportionately higher power levels as received at the base station antenna.
Claim 15
Dependent Claim
131 words
A base station for controlling the power transmitted by wireless devices of mixed types comprising: a transmitting antenna; a receiving antenna for receiving a composite spread signal; a memory for storing a unique code for each wireless device; a despreader which retrieves one of the unique codes from the memory and uses the unique code, which corresponds to a particular wireless device, to partially despread the composite spread signal to form a partially despread signal; and a processor for determining the power received at the base station receiving antenna from the particular wireless device, and for producing a control signal based on the type of the particular wireless device for controlling the power transmitted by the particular wireless device, wherein the control signal is sent to the transmitting antenna and transmitted.
Claim 16
Dependent Claim
29 words
The base station of claim 15 wherein the type of the particular wireless device is defined at least in part by the data rate of the particular wireless device.
Claim 17
Dependent Claim
31 words
The base station of claim 15 wherein the type of the particular wireless device is defined at least in part by the quality of service requirement for the particular wireless device.
Claim 18
Dependent Claim
29 words
The base station of claim 17 wherein the type of the particular wireless device is defined at least in part by the data rate of the particular wireless device.
Claim 19
Dependent Claim
41 words
The base station of claim 16 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher data rates produce proportionately higher power levels at the receiving antenna of the base station.
Claim 20
Dependent Claim
43 words
The base station of claim 17 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher quality of service requirements produce proportionately higher power levels at the receiving antenna of the base station.
Claim 21
Dependent Claim
41 words
The base station of claim 20 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher data rates produce proportionately higher power levels at the receiving antenna of the base station.
Claim 22
Independent Claim
92 words
A method for controlling the power transmitted by wireless devices of mixed types comprising: receiving a composite spread signal of the signals transmitted by a plurality of wireless devices; retrieving a unique code from memory corresponding to a particular wireless device and using the unique code to partially despread the composite spread signal; determining the current power received from the particular wireless device; and producing a control signal based on the type of the particular wireless device for controlling the power transmitted from the particular wireless device, and transmitting the control signal.
Claim 23
Dependent Claim
28 words
The method of claim 22 wherein the type of the particular wireless device is defined at least in part by the data rate of the particular wireless device.
Claim 24
Dependent Claim
30 words
The method of claim 22 wherein the type of the particular wireless device is defined at least in part by the quality of service requirement of the particular wireless device.
Claim 25
Dependent Claim
30 words
The method of claim 23 wherein the type of the particular wireless device is defined at least in part by the quality of service requirement of the particular wireless device.
Claim 26
Dependent Claim
38 words
The method of claim 23 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher data rates produce proportionately higher power levels as received by the base station.
Claim 27
Dependent Claim
40 words
The method of claim 24 wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher quality of service requirements produce proportionately higher power levels as received by the base station.
Claim 28
Dependent Claim
40 words
The method of claim 27 and further wherein the control signal controls the power transmitted by the particular wireless device such that wireless devices with proportionately higher data rates produce proportionately higher power levels as received by the base station.
Claim 29
Dependent Claim
204 words
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 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.
Claim 30
Dependent Claim
92 words
The base station of claim 29 wherein the type of wireless device is defined at least in part by the data rate; the current load share of each type of wireless device is proportional to current load value multiplied by the ratio of the data rate of that type of wireless device to a minimum data rate; and the population share of each type of wireless device is proportional to its population value multiplied by the ratio of the data rate of that type of wireless device to a minimum data rate.
Claim 31
Dependent Claim
103 words
The base station of claim 29 wherein the type of wireless device is defined at least in part by the quality of service requirement; the current load share of each type of wireless device is proportional to its current load value multiplied by the ratio of the quality of service requirement of that type of wireless device to a minimum quality of service requirement; and the population share of each type of wireless device is proportional to its population value multiplied by the ratio of the quality of service requirement of that type of wireless device to a minimum quality of service requirement.
Claim 32
Dependent Claim
103 words
The base station of claim 30 wherein the type of wireless device is defined at least in part by the quality of service requirement; the current load share of each type of wireless device is proportional to its current load value multiplied by the ratio of the quality of service requirement of that type of wireless device to a minimum quality of service requirement; and the population share of each type of wireless device is proportional to its population value multiplied by the ratio of the quality of service requirement of that type of wireless device to a minimum quality of service requirement.
Claim 33
Dependent Claim
52 words
The base station of claim 29 further comprising: a processor for determining a probability of transmission value based on the equivalent population value and the equivalent current load value, wherein the probability of transmission value is transmitted to wireless devices as indicia of the equivalent current load value and equivalent population value.
Claim 34
Independent Claim
180 words
A method for controlling access to an uplink frequency channel of a base station by wireless devices of mixed types comprising: 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.
Claim 35
Dependent Claim
79 words
The method of claim 34 wherein the type of wireless device is defined at least in part by the data rate; each current load share is proportional to the current load value for that type of wireless device multiplied by the ratio of its data rate to a minimum data rate; and each population share is proportional to the population of that type of wireless device multiplied by the ratio of its data rate to a minimum data rate.
Claim 36
Dependent Claim
89 words
The method of claim 34 wherein the type of wireless device is defined at least in part by the quality of service requirement; each current load share is proportional to the current load value for that type of wireless device multiplied by the ratio of its quality of service requirement to a minimum quality of service requirement; and each population share is proportional to the population of that type of wireless device multiplied by the ratio of its quality of service requirement to a minimum quality of service requirement.
Claim 37
Dependent Claim
90 words
The method of claim 35 wherein the type of the wireless device is defined at least in part by the quality of service requirement; each current load share is proportional to the current load value for that type of wireless device multiplied by the ratio of its quality of service requirement to a minimum quality of service requirement; and each population share is proportional to the population of that type of wireless device multiplied by the ratio of its quality of service requirement to a minimum quality of service requirement.
Claim 38
Dependent Claim
52 words
The method of claim 37 further comprising determining probability of transmission values for particular types of wireless devices based on the equivalent population value and the equivalent current load value; and transmitting the probability of transmission values as indicia of the equivalent population value and equivalent current load value to wireless devices.
Claim 39
Dependent Claim
118 words
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; 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 a base station.
Claim 40
Dependent Claim
46 words
The wireless device of claim 39 wherein the control signal contains an equivalent current load value and an equivalent population value for the base station; and the processor determines the probability of transmission value based on the equivalent current load value and the equivalent population value.
Claim 41
Dependent Claim
26 words
The wireless device of claim 39 wherein the processor determines the probability of transmission value by extracting the probability of transmission value from the control signal.
Claim 42
Dependent Claim
38 words
The wireless device of claim 40 wherein the processor further comprises a random number generator, the random number generator using the probability of transmission value to determine if the wireless device transmits data signals to the base station.
Claim 43
Dependent Claim
38 words
The wireless device of claim 41 wherein the processor further comprises a random number generator, the random number generator using the probability of transmission value to determine if the wireless device transmits data signals to the base station.
References Cited (Backward Citations)
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