Patent US2252565A successfully refreshed from Google Patents.
EP1043908A2
Expired / Lapsed
EP
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Intelligent burst control functions for wireless communication systems
Assignee: Nokia of America Corp
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Filing: 2000-03-28
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Granted: —
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Expires: 2020-03-28
Abstract
Abstract The invention provides a novel methodology for increasing the performance of CDMA systems with packet data services by accommodating a variety of users with different rates. The invention operates to increase the spectrum efficiency of a wireless system by using an optimal transmission set of base transceiver stations and assigning proper data rates to efficiently utilize the radio resources. In particular, the invention operates to decrease interference so that the quality of data transmission in CDMA systems is advantageously maintained. Moreover, the invention operates to increase the allocation of bandwidth, particularly for high-speed data services. The invention provides a methodology to evaluate the data rates of different combinations of BTSs that may be in connection with a particular mobile station (MS), allocate an appropriate data rate for the MS and make allocation of system resources more efficient in a multi-user environment.
Inventors
- 👤 Tsao-Tsen Chen
- 👤 Wen-Yi Kuo
- 👤 Martin Howard Meyers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 05:33
CPC Classifications
H; H04; H04W; H04W28/00; H04W28/16; H04W28/18; H04W28/22; H04B; H04B17/00; H04B17/30; H04B17/309; H04B17/318; H04W36/00; H04W36/16; H04W36/18; H04W52/00; H04W52/04; H04W52/30; H04W52/34; H04W52/343; H04W36/0005; H04W36/0055; H04W36/0069; H04W36/00692; H04W72/00; H04W72/04; H04W72/044; H04W72/0453
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A resource allocation method for a wireless communication system having a
plurality of base transceiver stations operative to serve a plurality of mobile stations and
wherein an active set of base transceiver stations is determined with respect to a mobile
station, the method comprising the steps of: creating at least one reduced active set from combinations of base transceiver
stations in the active set; determining an affordable data rate for each of the at least one reduced active set;
and selecting a data rate from the affordable data rate of each of the at least one
reduced active set.
Claim 2
Dependent Claim
38 words
The method in Claim 1, further comprising the step of calculating a geometry for
each of the at least one reduced active set of base transceiver stations, wherein the
geometry is a metric that approximates a signal-to-interference ratio.
Claim 3
Dependent Claim
26 words
The method in Claim 1, further comprising the step of evaluating a power
parameter of base transceiver stations in the at least one reduced active set.
Claim 4
Dependent Claim
76 words
The method in Claim 2 wherein the geometry of the at least one reduced active
set is calculated based on: geometry = (sum of power of the reduced active set) / (other) wherein sum of power of the reduced active set is total power of all base
transceiver stations in the at least one reduced active set received by the mobile station,
and other is a sum of all other power received by the mobile station.
Claim 5
Dependent Claim
86 words
The method in Claim 2 wherein the geometry of a reduced active set is calculated
based on: geometry = (reduced active set) / (other BTSs in the active set + other) wherein reduced active set is total power of all base transceiver stations in the
reduced active set received by the mobile station, other BTSs in the active set is the
power of all other base transceiver stations in the active set, and other is a sum of all
other power received by the mobile station.
Claim 6
Dependent Claim
112 words
The method in Claim 1, further comprising the step of detecting a relative signal
strength received at the mobile station from a reduced active set of base transceiver
stations, wherein the reduced active set is selected from the group consisting of: a strongest set only; a second strongest set only; the strongest set and the second strongest set only; the strongest set and a third strongest set only; the second strongest set and the third strongest set only; and the strongest set, the second strongest set and the third strongest set wherein the strongest set, the second strongest set and the third strongest set
comprises base transceiver stations from the active set.
Claim 7
Dependent Claim
42 words
The method in Claim 1, further comprising the step of calculating a power
adjustment for the at least one reduced active set, wherein the affordable data rate of the
at least one reduced active set is calculated based on the power adjustment.
Claim 8
Dependent Claim
56 words
The method in Claim 7, wherein the power adjustment is calculated based on: wherein Active set geometry is a geometry for the active set of base transceiver
stations corresponding to the mobile station, Reduced active set geometry is the
geometry of a reduced active set of base transceiver stations, and slope_t and OFFSET_FP are predetermined parameters.
Claim 9
Dependent Claim
77 words
The method in Claim 8, wherein the affordable data rate is determined based on: wherein P data is a data channel power mean, and P DCCH = DCCH power mean + Fw_scal_std DDCH power var iance wherein DCCH power mean is a specific power mean, Fw_scal_std is a scaling
parameter, loading is power loading, √ DDCH power var iance is a standard deviation of
power, adjustment is the calculated power adjustment, and headroom is a predetermined
parameter.
Claim 10
Dependent Claim
35 words
The method in Claim 1, wherein the affordable data rate of a reduced active set is
a minimum data rate of all of the data rates of base transceiver stations in the reduced
active set.
Claim 11
Dependent Claim
23 words
The method in Claim 1, wherein the selected data rate is a maximum affordable
data rate of all of the affordable data rates.
Claim 12
Dependent Claim
43 words
The method in Claim 1, further comprising the step of creating at least one
lookup table established to receive input parameters of geometry, frame error rate and
coding structure, wherein the affordable data rate is determined from the at least one
lookup table.
Claim 13
Dependent Claim
33 words
The method in Claim 2, further comprising the step of creating at least one
lookup table established to receive input parameters, wherein the geometry is determined
from the at least one lookup table.
Claim 14
Dependent Claim
42 words
The method in Claim 7, further comprising the step of creating at
least one lookup table established to receive input parameters of geometry, frame error
rate and coding structure, wherein the power adjustment is determined from the at least
one lookup table.
Claim 15
Dependent Claim
26 words
The method in Claim 1 wherein the system is a CDMA system
having a forward link and a reverse link, the system having burst transmission
capability.
Claim 16
Dependent Claim
57 words
A wireless communication system having a plurality of base
transceiver stations operative to serve a plurality of mobile stations and wherein an
active set of base transceiver stations is determined with respect to a mobile station, the
system comprising means adapted to carry out each step of a method as claimed in any
of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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