Source: http://www.google.nl/patents/US20050111407
Timestamp: 2017-12-14 04:27:40
Document Index: 372106460

Matched Legal Cases: ['art 2002', 'art 2008', 'art 2014', 'art 2006', 'art 2006', 'art 2010']

Patent US20050111407 - Common rate control method for reverse link channels in CDMA networks - Google Patenten
A radio base station transmits periodic load indications based on the measured reverse link load to a plurality of mobile stations transmitting on a reverse link channel. If the measure reverse link load is within a first predetermined range, the radio base stations transmits a load indication instructing...http://www.google.nl/patents/US20050111407?utm_source=gb-gplus-sharePatent US20050111407 - Common rate control method for reverse link channels in CDMA networks
Publicatienummer US20050111407 A1
Aanvraagnummer US 10/876,979
Prioriteitsdatum 21 nov 2003
Ook gepubliceerd als CN1977485A, CN1977485B, EP1759474A1, EP1759474B1, US7616660, WO2006007058A1
Publicatienummer 10876979, 876979, US 2005/0111407 A1, US 2005/111407 A1, US 20050111407 A1, US 20050111407A1, US 2005111407 A1, US 2005111407A1, US-A1-20050111407, US-A1-2005111407, US2005/0111407A1, US2005/111407A1, US20050111407 A1, US20050111407A1, US2005111407 A1, US2005111407A1
Uitvinders Patrick Hosein, Tao Wu
Oorspronkelijke patenteigenaar Hosein Patrick A., Tao Wu
Patentcitaties (14), Verwijzingen naar dit patent (31), Classificaties (5), Juridische gebeurtenissen (5)
US 20050111407 A1
For the embodiment shown in FIG. 5, the RBS 36 determines the load indication b(n) as follows: if ( L ( n ) > L MAX ) { set b ( n ) = 111 } elseif ( L MAX >= L ( n ) > L 1 ) { set b ( n ) = 110 } elseif ( L 1 >= L ( n ) > L 2 ) { set b ( n ) = 101 } elseif ( L 2 >= L ( n ) > L MIN ) { set b ( n ) = 010 } else { set b ( n ) = 000 } Eq . 2
For the embodiment shown in FIG. 6, the RBS 36 determines the load indication b(n) as follows: if ( L ( n ) > L MAX ) { set b ( n ) = 111 } elseif ( L MAX >= L ( n ) > L 1 ) { set b ( n ) = 110 } elseif ( L 1 >= L ( n ) > L T ) { set b ( n ) = 101 } elseif ( L T >= L ( n ) > L 2 ) { set b ( n ) = 100 } elseif ( L 2 >= L ( n ) > L MIN ) { set b ( n ) = 010 } else { set b ( n ) = 000 } Eq . 3
In the embodiment shown in FIG. 4, the mobile stations 100 assign a numeric value to each load indication b(n) as follows: b ( n ) = 11 = 2 b ( n ) = 10 = 1 b ( n ) = 01 = - 1 b ( n ) = 00 = - 2 Eq . 4
In preferred embodiments of the invention, the probability P(n) of changing rate is dependent upon the distance of the load tracking value y(n) from a target load tracking value. Since the load tracking value of Eq. 5 varies between −2 and 2, the target load tracking value may be set equal to 0 and the mapping of the load tracking value to a rate change probability may be according to: P ( n ) =  y ( n )  2 Eq . 6
Those skilled in the art will appreciate that mapping from y(n) to a rate change probability P(n) can be a general mapping and need not be restricted to the linear mappings. Eqs. 8 and 9 below are mapping functions that illustrate one approach to calculating rate change probabilities based on an expected load value. In this example and all examples to follow, it is assumed that the load tracking value y(n) varies between −1 and 1, or is scaled to yield a value between −1 and 1. When y(n)>0, the load tracking value y(n) can be mapped non-linearly to a downward rate change probability Pd (n) according to: P d ( n ) = 2 y ( n ) ( β - 1 ) 1 + y ( n ) ( β - 1 ) Eq . 8
When y(n)<0, the load tracking value can be mapped non-linearly to an upward rate change probability Pu(n) according to: P u ( n ) = - y ( n ) ( β - 1 ) 1 + y ( n ) ( β - 1 ) Eq . 9
In some embodiments of the invention, the mapping of the load tracking value to a rate change probability can be made mobile dependent, QoS dependent, or user class dependent. As an example of user class dependent rate change probabilities, assume that the mobile stations 100 are classified into three classes: gold, silver and bronze. Also assume that the load tracking value varies between −1 and 1, or is scaled to yield a value between −1 and 1. If γi represents a class dependent adjustment factor, a mobile station 100 in class i computes the rate change probability as follows: if y ( n ) > γ i { set P ( n ) = min ( 1 , ( y ( n ) - γ i ) / ( 1 - γ i ) } if y ( n ) < γ i { set P ( n ) = min ( 1 , ( γ i - y ( n ) ) / ( γ i + 1 ) } else if { set P ( n ) = 0 } Eq . 10
Note that values of γi are selected such that ∑ i γ i = 0
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Internationale classificatie H04L1/00, H04W28/22
Coöperatieve classificatie H04W28/22
Europese classificatie H04W28/22
25 juni 2004 AS Assignment
9 maart 2010 CC Certificate of correction
19 okt 2010 CC Certificate of correction