Method and apparatus for providing high speed data communications in a cellular environment
First Claim
1. A method of providing a signal transmitted over the air from an infrastructure element to a remote unit in a wireless communication system, comprising:
- receiving, at the infrastructure element, information indicative of a quality measure of a wireless channel for communications between the infrastructure element and the remote unit, wherein the information indicative of the quality measure is at least partially based on information received from the remote unit of physical location of the remote unit; and
determining a transmission rate representing a rate of signal bits transmitted over the air from the infrastructure element to the remote unit and a separate information rate representing a rate of user generated information bits by;
establishing the information rate by selecting, at the infrastructure element, based on the received information indicative of the quality measure, a channel encoding rate at which to encode the signal for subsequent transmission at the transmission rate at a fixed power level;
transmitting the signal at the transmission rate at said fixed power level; and
selectively altering the channel encoding rate at which the infrastructure element encodes the signal upon encountering changes in the information received from the remote unit of physical location of the remote unit.
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Accused Products
Abstract
A method and apparatus for transmitting digital data in a cellular environment. Adjacent cells of the cellular system are prevented from simultaneously transmitting data. Because the noise from transmissions of adjacent cells is a primary source of interference, the transmission rate of power limited base stations can be dramatically increased when the noise from adjacent cells is eliminated. The transmissions to each subscriber station are made at a fixed transmission power level. However, the data rate of transmitted signals differs from one subscriber station to another depending the path loss differences. In a first exemplary embodiment, the data rate of transmissions to a subscriber station is determined by selecting an encoding rate for the transmitted signal while holding the symbol rate constant. In a second exemplary embodiment, the data rate of transmissions to a subscriber station is determined by selection a modulation format for the transmitted signal which directly changes the symbol rate of transmission to a subscriber station.
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Citations
18 Claims
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1. A method of providing a signal transmitted over the air from an infrastructure element to a remote unit in a wireless communication system, comprising:
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receiving, at the infrastructure element, information indicative of a quality measure of a wireless channel for communications between the infrastructure element and the remote unit, wherein the information indicative of the quality measure is at least partially based on information received from the remote unit of physical location of the remote unit; and determining a transmission rate representing a rate of signal bits transmitted over the air from the infrastructure element to the remote unit and a separate information rate representing a rate of user generated information bits by; establishing the information rate by selecting, at the infrastructure element, based on the received information indicative of the quality measure, a channel encoding rate at which to encode the signal for subsequent transmission at the transmission rate at a fixed power level; transmitting the signal at the transmission rate at said fixed power level; and selectively altering the channel encoding rate at which the infrastructure element encodes the signal upon encountering changes in the information received from the remote unit of physical location of the remote unit. - View Dependent Claims (2, 3)
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4. An infrastructure element configured to provide a signal to be transmitted over the air to a remote unit in a wireless communication system, the infrastructure element comprising:
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means for receiving information indicative of a quality measure of a wireless channel for communications between the infrastructure element and the remote unit, wherein the information indicative of the quality measure is at least partially based on information received from the remote unit of physical location of the remote unit; and means for determining a transmission rate representing a rate of signal bits transmitted over the air from the infrastructure element to the remote unit and a separate information rate representing a rate of user generated information bits, including; means for establishing the information rate by selecting, based on the received information indicative of the quality measure, a channel coding rate at which to encode the signal for transmission at the transmission rate at a fixed power level; means for transmitting the signal at the transmission rate at said fixed power level; whererin said means for determining is configured to selectively alter the channel coding rate at which the infrastructure element encodes the signal upon encountering changes in the information received from the remote unit of physical location of the remote unit. - View Dependent Claims (5, 6)
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7. An infrastructure element configured to provide a signal transmitted over the air to a remote unit in a wireless communication system, comprising:
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a receiver configured to receive information indicative of a quality measure of a wireless channel for communications between the infrastructure element and the remote unit, wherein the information indicative of the quality measure is at least partially based on information received from the remote unit of physical location of the remote unit; a controller coupled to the receiver and configured to determine a transmission rate representing a rate of signal bits transmitted over the air from the infrastructure element to the remote unit and a separate information rate representing a rate of user generated information bits by establishing the information rate by selecting, based on the received information indicative of the quality measure, a channel coding rate at which to encode the signal for transmission at the transmission rate at a fixed power level; and a transmitter coupled to the controller and configured to transmit the signal at the transmission rate at said fixed power level; wherein the controller is configured to selectively alter the channel coding rate at which the infrastructure element encodes the signal upon encountering changes in the information received from the remote unit of physical location of the remote unit. - View Dependent Claims (8, 9)
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10. A method of providing a signal from an infrastructure element to a remote unit over a wireless channel, comprising:
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determining a transmission rate representing a rate of signal bits transmitted over the air from the infrastructure element and a separate information rate representing a rate of user generated information bits by; transmitting to the infrastructure element information indicative of a quality measure of the wireless channel, wherein the information indicative of the quality measure is at least partially based on information received from the remote unit of physical location of the remote unit; and establishing the information rate by selecting, based on the information indicative of the quality measure of the wireless channel, a channel coding rate at which to encode the signal for subsequent transmission at the transmission rate at a fixed power level; and receiving at the remote unit the signal encoded at the channel coding rate, wherein the signal is transmitted by the infrastructure element to the remote unit at the transmission rate at said fixed power level, and further wherein the channel coding rate is selectively altered based on changes in information received from the remote unit of physical location of the remote unit. - View Dependent Claims (11, 12)
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13. A remote unit configured to receive a signal transmitted by an infrastructure element over a wireless channel, the remote unit comprising:
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means for determining a transmission rate representing a rate of signal bits transmitted over the air from the infrastructure element and a separate information rate representing a rate of user generated information bits including; means for transmitting to the infrastructure element information indicative of a quality measure of the wireless channel, wherein the information indicative of the quality measure is at least partially based on location of the remote unit, wherein the infrastructure element comprises means for establishing the information rate by selecting, based on the information indicative of the quality measure of the wireless channel, a channel coding rate at which to encode the signal for subsequent transmission at the transmission rate at the fixed power level; and means for receiving at the remote unit the signal encoded at the channel coding rate, wherein the signal is transmitted by the infrastructure element to the remote unit at the transmission rate at said fixed power level, and further wherein the channel coding rate is selectively altered based on changes in the location of the remote unit. - View Dependent Claims (14, 15)
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16. A remote unit configured to receive a signal transmitted by an infrastructure element over a wireless channel, the remote unit comprising:
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a transmitter configured to transmit to the infrastructure element information indicative of a quality measure of the wireless channel, wherein the information indicative of the quality measure is at least partially based on information received from the remote unit of location of the remote unit; and a receiver configured to receive the signal encoded at an information rate that is based on the information indicative of the quality measure of the wireless channel, wherein the information rate is a rate of user generated information bits representing a maximum available data rate for data transmission at a transmission rate at a fixed power from the infrastructure element to the remote unit, and wherein the signal is transmitted by the infrastructure element to the remote unit at the transmission rate at said fixed power and further wherein the information rate is selectively altered based on changes in the information received from the remote unit of physical location of the remote unit. - View Dependent Claims (17, 18)
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Specification