US6356531B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring of CDMA load and frequency reuse based on reverse link signal-to-noise ratio
Assignee: Qualcomm Inc
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Filing: 1999-06-07
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Granted: 2002-03-12
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Expires: 2019-06-07
Abstract
Abstract A system and method for monitoring the load on a CDMA communication system having a base station and a plurality of users. A measure of voice activity in the communication system is determined, and a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency is provided. A power determination is made according to the measured voice activity and the current value of frequency reuse efficiency. The current value of frequency reuse efficiency is updated using the power determination to provide a new current value of frequency reuse efficiency. The power determination and the update of the frequency reuse efficiency are iteratively repeated until convergence to provide a converged value of frequency reuse efficiency. The load on the communication system is then determined according to the converged frequency reuse efficiency value.
Inventors
- 👤 Samir S. Soliman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:45
CPC Classifications
H; H04; H04W; H04W24/00; H04W16/00; H04W16/02; H04W16/04; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
121 words
A method for monitoring the load on a CDMA communication system, comprising the steps of: (a) determining a measure of voice activity in the communication system; (b) providing a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency; (c) making a power determination according to the determined voice activity and the current value of frequency reuse efficiency; (d) using the power determination to update the current value of frequency reuse efficiency to provide a new current value of frequency reuse efficiency; (e) repeating steps (c) and (d) until convergence to provide a converged frequency reuse efficiency value; and (f) determining the load on the communication system in accordance with the converged frequency reuse efficiency value.
Claim 2
Independent Claim
121 words
A method for monitoring the load on a CDMA communication system, comprising the steps of: (a) determining a measure of voice activity in the communication system; (b) providing a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency; (c) making a power determination according to the determined voice activity and the current value of frequency reuse efficiency; (d) using the power determination to update the current value of frequency reuse efficiency to provide a new current value of frequency reuse efficiency; (e) repeating steps (c) and (d) until convergence to provide a converged frequency reuse efficiency value; and (f) determining the load on the communication system in accordance with the converged frequency reuse efficiency value.
Claim 3
Dependent Claim
21 words
The method of claim 1 , wherein the communication system comprises a base station that services a plurality of mobile stations.
Claim 4
Dependent Claim
71 words
The method of claim 2 , wherein step (c) comprises the steps of: (i) determining a total received power (P t ) associated with a kth sector; and (ii) calculating a power value (P cdma (n)) in accordance with the total received power (P t ) associated with the kth sector, the determined voice activity and a current value of frequency reuse efficiency associated with the kth sector (F k (n)).
Claim 5
Dependent Claim
50 words
The method of claim 3 , wherein step (d) comprises the step of calculating a new current value of frequency reuse efficiency associated with the kth sector F k (n+1) using the power value (P cdma (n)) and the total received power (P t ) associated with the kth sector.
Claim 6
Dependent Claim
62 words
The method of claim 4 , wherein the new current value of frequency reuse efficiency F k (n+1) is determined in step (d) in accordance with the following equation: F k ( n + 1 ) = P ( n ) P t - N o W wherein N o W represents background noise received at the base station.
Claim 7
Dependent Claim
50 words
The method of claim 5 , wherein step (e) comprises the step of repeating steps (c) and (d) until a difference between the new current value of frequency reuse efficiency F k (n+1) and the current value of frequency reuse efficiency F k (n) is less than a predetermined threshold.
Claim 8
Dependent Claim
43 words
The method of claim 6 , wherein step (e) comprises the step of repeating steps (c) and (d) until the new current value of frequency reuse efficiency F k (n+1) and the current value of frequency reuse efficiency F k (n) are equal.
Claim 9
Dependent Claim
112 words
The method of claim 6 , wherein step (f) comprises determining a load (L) on the communication system in accordance with the following equation: L = 1 F k ∑ i = 1 N v i x i W / R i + 1 F k v i x i where F k is the converged frequency reuse efficiency value, v i corresponds to the voice activity measured in step (a), R i is the data rate of a user of the communication system, and x i is the energy per bit to noise power spectral density of a reverse traffic channel in the communication system.
Claim 10
Dependent Claim
31 words
The method of claim 1 , wherein the communication system includes a sector, and step (f) comprises determining the load of the sector according to the converged frequency reuse efficiency value.
Claim 11
Dependent Claim
20 words
The method of claim 9 , further comprising the step of controlling the communication system according to the sector loading.
Claim 12
Dependent Claim
29 words
The method of claim 1 , further comprising the step of controlling the admission of new users to the communication system according to the load determined in step (f).
Claim 13
Dependent Claim
24 words
The method of claim 1 , further comprising the step of collecting peak hour activities according to the load value determined in step (f).
Claim 14
Dependent Claim
17 words
The method of claim 1 , wherein the initial value of frequency reuse efficiency is approximately 0.66.
Claim 15
Independent Claim
132 words
A system for monitoring the load on a CDMA communication system, comprising: (a) a value representing voice activity in the communication system; (b) a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency; (c) a value representing system power determined according to the voice activity and the current value of frequency reuse efficiency; (d) a new current value of frequency reuse efficiency provided by updating the current value of the frequency reuse efficiency in accordance with the value representing system power; (e) a converged frequency reuse efficiency value determined by performing iterative operations on the determined system power and the current value of frequency reuse efficiency; and (f) a controller that determines the load on the communication system according to the converged frequency reuse efficiency value.
Claim 16
Independent Claim
132 words
A system for monitoring the load on a CDMA communication system, comprising: (a) a value representing voice activity in the communication system; (b) a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency; (c) a value representing system power determined according to the voice activity and the current value of frequency reuse efficiency; (d) a new current value of frequency reuse efficiency provided by updating the current value of the frequency reuse efficiency in accordance with the value representing system power; (e) a converged frequency reuse efficiency value determined by performing iterative operations on the determined system power and the current value of frequency reuse efficiency; and (f) a controller that determines the load on the communication system according to the converged frequency reuse efficiency value.
Claim 17
Independent Claim
138 words
A system for monitoring the load on a CDMA communication system, comprising: (a) means for determining a measure of voice activity in the communication system; (b) means for providing a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency; (c) means for making a power determination according to the determined voice activity and the current value of frequency reuse efficiency; (d) means for using the power determination to update the current value of frequency reuse efficiency to provide a new current value of the frequency reuse efficiency; (e) means for providing a converged frequency reuse efficiency value by performing iterative operations on the determined system power and the current value of frequency reuse efficiency; and (f) means for determining the load on the communication system according to the converged frequency reuse value.
Claim 18
Independent Claim
138 words
A system for monitoring the load on a CDMA communication system, comprising: (a) means for determining a measure of voice activity in the communication system; (b) means for providing a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency; (c) means for making a power determination according to the determined voice activity and the current value of frequency reuse efficiency; (d) means for using the power determination to update the current value of frequency reuse efficiency to provide a new current value of the frequency reuse efficiency; (e) means for providing a converged frequency reuse efficiency value by performing iterative operations on the determined system power and the current value of frequency reuse efficiency; and (f) means for determining the load on the communication system according to the converged frequency reuse value.
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| 3.5 Years (Year 4) | 2005-03-11 | 2005-09-10 | 2006-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-03-11 | 2009-09-10 | 2010-03-12 | $3760.00 | Window Closed / Lapsed |
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