EVDO coverage modification based on backhaul capacity
First Claim
1. In a base station communicatively coupled with a wireless communication system by way of a backhaul connection, a method comprising:
- determining a capacity of the backhaul connection for transport of data communications; and
adjusting a transmission power level on a first forward link of an air interface to a first access terminal based on the determined capacity,wherein the base station and the first access terminal are configured to operate according to a CDMA family of protocols, including at least 1 times radio transmission technology (1×
-RTT) and evolution data optimized (EVDO),and wherein adjusting the transmission power level on the first forward link of an air interface to the first access terminal based on the determined capacity comprises;
determining a supportable data rate to the base station over the backhaul connection based on the determined capacity; and
setting the transmission power on the first forward link to a tuned level that supports a forward-link data rate to the first access terminal commensurate with the supportable data rate by adjusting the transmission power level on the first forward link of the air interface until forward-link data rate control (DRC) messages received from the first access terminal correspond to a requested data rate that is within a predefined range about the supportable data rate.
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Accused Products
Abstract
A method and system is disclosed for adjusting wireless access coverage based on backhaul capacity. A base station, such as a femtocell, will determine the capacity of its backhaul connection in the downlink direction. The base station will then adjust the power level of it forward link to help ensure that the forward-link data rate to an access terminal is approximately matched to the determined capacity of its backhaul connection. In an example embodiment, the base station will adjust the power level of its pilot until the access terminal is requesting a forward-link data rate commensurate with the downlink rate on the backhaul connection.
161 Citations
19 Claims
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1. In a base station communicatively coupled with a wireless communication system by way of a backhaul connection, a method comprising:
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determining a capacity of the backhaul connection for transport of data communications; and adjusting a transmission power level on a first forward link of an air interface to a first access terminal based on the determined capacity, wherein the base station and the first access terminal are configured to operate according to a CDMA family of protocols, including at least 1 times radio transmission technology (1×
-RTT) and evolution data optimized (EVDO),and wherein adjusting the transmission power level on the first forward link of an air interface to the first access terminal based on the determined capacity comprises; determining a supportable data rate to the base station over the backhaul connection based on the determined capacity; and setting the transmission power on the first forward link to a tuned level that supports a forward-link data rate to the first access terminal commensurate with the supportable data rate by adjusting the transmission power level on the first forward link of the air interface until forward-link data rate control (DRC) messages received from the first access terminal correspond to a requested data rate that is within a predefined range about the supportable data rate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A base station configured to be communicatively coupled with a wireless communication system by way of a backhaul connection, the base station comprising:
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one or more processors; memory accessible by the one or more processors; and machine-language instructions stored in the memory that, upon execution by the one or more processors, cause the base station to carry out functions including; determining a capacity of the backhaul connection for transport of data communications, and adjusting a transmission power level on a first forward link of an air interface to a first access terminal based on the determined capacity, wherein the base station is further configured to communicate with the first access terminal according to a CDMA family of protocols, including at least 1 times radio transmission technology (1×
-RTT) and evolution data optimized (EVDO),and wherein adjusting the transmission power level on the first forward link of an air interface to the first access terminal based on the determined capacity comprises; determining a supportable data rate to the base station over the backhaul connection based on the determined capacity; and setting the transmission power on the first forward link to a tuned level that supports a forward-link data rate to the first access terminal commensurate with the supportable data rate by adjusting the transmission power level on the first forward link of the air interface until forward-link data rate control (DRC) messages received from the first access terminal correspond to a requested data rate that is within a predefined range about the supportable data rate. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A tangible non-transitory computer-readable medium having instructions stored thereon that, upon execution by one or more processors of a base station, cause the base station to carry out functions comprising:
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determining a capacity of a backhaul connection by which the base station is configured to be communicatively connected with a wireless communication system; and adjusting a transmission power level on a first forward link of an air interface to a first access terminal based on the determined capacity, wherein the base station is further configured to communicate with the first access terminal according to a CDMA family of protocols, including at least 1 times radio transmission technology (1×
-RTT) and evolution data optimized (EVDO),and wherein adjusting the transmission power level on the first forward link of an air interface to the first access terminal based on the determined capacity comprises; determining a supportable data rate to the base station over the backhaul connection based on the determined capacity; and setting the transmission power on the first forward link to a tuned level that supports a forward-link data rate to the first access terminal commensurate with the supportable data rate by adjusting the transmission power level on the first forward link of the air interface until forward-link data rate control (DRC) messages received from the first access terminal correspond to a requested data rate that is within a predefined range about the supportable data rate. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification