US20140153395A1 - User equipment in a congestion controlled cdma system - Google Patents
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- US20140153395A1 US20140153395A1 US14/087,426 US201314087426A US2014153395A1 US 20140153395 A1 US20140153395 A1 US 20140153395A1 US 201314087426 A US201314087426 A US 201314087426A US 2014153395 A1 US2014153395 A1 US 2014153395A1
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- H04B17/005—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/04—Traffic adaptive resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/09—Management thereof
- H04W28/0925—Management thereof using policies
- H04W28/0942—Management thereof using policies based on measured or predicted load of entities- or links
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
- H04W48/06—Access restriction performed under specific conditions based on traffic conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
A system for controlling congestion in a code division multiple access system with multi-user detection capabilities is disclosed. The system includes at least one user equipment, a base station, and a radio network controller. Each user equipment includes a receiver having multi-user detection capabilities. The base station includes a receiver having multi-user detection capabilities, an intra-cell interference measuring device, and an inter-cell interference measuring device. The radio network controller includes a radio resource management device configured to control congestion based on measurements taken by the base station.
Description
- This application is a continuation of U.S. patent application Ser. No. 12/004,219, filed Dec. 20, 2007, issuing as U.S. Pat. No. 8,605,577 on Dec. 10, 2013, which is a continuation of U.S. patent application Ser. No. 10/265,046, filed on Oct. 4, 2002, now U.S. Pat. No. 7,313,091, issued Dec. 25, 2007, which claims priority from U.S. Provisional Patent Application No. 60/383,025, filed on May 24, 2002, which are incorporated by reference as if fully set forth herein.
- The present invention relates to code division multiple access (CDMA) systems with multi-user detection (MUD) capabilities, where the capacity of the system is limited by non-cancelled intra-cell interference, non-cancelled inter-cell interference and interference associated with the noise floor.
- In CDMA systems, one of the factors that limit the capacity of the system is interference. In general, these systems try to generate as little interference as possible. Power control is one approach that is commonly used in order to maintain the interference limits as low as possible. Nevertheless, when a CDMA system attempts to support many users, even if the transmission power is being controlled, the levels of interference may not be acceptable.
- The concept of CDMA uplink (UL) pole capacity has been widely used for evaluating when a system is becoming congested. This concept is based on the exponential growth of interference caused by a CDMA system, i.e. all interference above the noise floor. The interference caused by a CDMA system is made up of intra-cell interference and inter-cell interference. Intra-cell interference is interference generated in a cell that is occupied by a user. Inter-cell interference, in contrast, is interference generated from all sources outside of the cell in which the user is located. The pole capacity is the theoretical maximum capacity assuming the mobiles have infinite available transmitting power. The actual capacity is typically a fraction of the pole capacity. Although the concept generally applies to any point-to-multipoint CDMA system, the use of a MUD in the receiver that cancels some of the intra-cell interference varies the principle on which the concept is based thereby rendering the concept not applicable.
- A method is therefore needed for evaluating congestion in CDMA systems having MUD capabilities.
- A system for controlling congestion in a code division multiple access (CDMA) system with multi-user detection capabilities is disclosed. The system includes at least one user equipment, a base station, and a radio network controller. Each user equipment includes a receiver having multi-user detection capabilities. The base station includes a receiver having multi-user detection capabilities, an intra-cell interference measuring device, and an inter-cell interference measuring device. The radio network controller includes a radio resource management device configured to control congestion based on measurements taken by the base station.
- A system for controlling congestion in a CDMA system with multi-user detection capabilities includes at least one user equipment, a base station, and a radio network controller. Each user equipment includes a receiver having multi-user detection capabilities, an intra-cell interference measuring device, and an intra-cell interference signaling device configured to send a signal that is indicative of intra-cell interference to the base station. The base station includes a receiver having multi-user detection capabilities and an intra-cell interference signal receiver configured to receive the signal sent by the intra-cell interference signaling device. The radio network controller includes a radio resource management device configured to control congestion based on measurements taken by the at least one user equipment.
- A system for controlling congestion in a CDMA system with multi-user detection capabilities includes at least one user equipment, a base station, and a radio network controller. The base station includes a receiver having multi-user detection capabilities, an intra-cell interference measuring device, and an inter-cell interference measuring device. The radio network controller includes a radio resource management device configured to calculate a noise rise value that is indicative of interference in the CDMA system, monitor the noise rise value to detect congestion, and implement congestion relieving measures on a condition that congestion is detected, whereby the radio resource management device controls congestion.
- A system for controlling uplink congestion in a CDMA system with multi-user detection capabilities includes a base station, at least one user equipment, and a radio network controller. The base station includes a receiver having multi-user detection capabilities and an inter-cell interference measuring device. Each user equipment includes a receiver having multi-user detection capabilities, an intra-cell interference measuring device, and an intra-cell interference signaling device configured to send a signal that is indicative of intra-cell interference to the base station. The radio network controller includes a radio resource management device configured to control congestion based on the intra-cell interference signal from the at least one user equipment and the inter-cell interference measured by the base station.
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FIG. 1 is a flow diagram showing a method for monitoring congestion in the UL based on UE measurements for CDMA systems having MUD capabilities in accordance with an embodiment of the invention. -
FIG. 2 is a flow diagram showing a method for monitoring congestion in the UL based on RAN measurements for CDMA systems having MUD capabilities in accordance with an embodiment of the invention. -
FIG. 3 is a flow diagram showing a method for relieving congestion in accordance with an embodiment of the invention. -
FIG. 4 is a system for monitoring and controlling congestion in the UL based on UE measurements in accordance with an embodiment of the invention. -
FIG. 5 is a system for monitoring and controlling congestion in the UL based on RAN measurements in accordance with the invention. - For uplink (UL) congestion detection based on UE measurements, the pole capacity of regular CDMA systems, i.e., CDMA systems not having MUD capabilities, may be determined by measuring the noise rise, which is the ratio of the total perceived interference to noise floor:
-
- where the total perceived interference is all non-cancelled interference (both intra-cell and inter-cell) at the receiver, the noise floor is all noise that is unrelated to the system such as the thermal noise, and ηUL, is the UL load factor. In CDMA systems having MUD capabilities, however, the MUD reduces intra-cell interference (Ior) and amplifies inter-cell interference (Ioc). Therefore, to accurately measure noise rise in CDMA systems having MUD capabilities, the ηUL should account for the affect the MUD has on interference.
- To specifically account for the effect of the MUD, two parameters (one to account for the decrease in Ior and one to account for the increase in Ioc) are defined and incorporated into ηUL. The first parameter,
α UL represents the average ratio of the cancelled Ior to the total Ior and is used to account for the decrease in Ior. The second parameter,β UL, represents the average ratio of received extra Ioc to the total Ioc and is used to account for the increase in Ioc. The parametersα UL andβ UL may be measured, calculated or assumed, as desired. Using Ior, Ioc,α UL andβ UL, the total perceived interference as affected by the MUD is (1−α UL)Ior+(1+β UL)Ioc. - In a first embodiment of the invention, congestion detection is based on UE measurements. UE measurements, however, with respect to interference generated by the system, are limited to Ior. Therefore, to also account for Ior, ηUL is obtained according to:
-
- where i is a predetermined value representing a ratio of Ioc to Ior and the sum represents Ior. In the sum, N is the number of users in the cell; W is the carrier bandwidth; and ρj, Rj and vj are the signal-to-noise ratio (Eb/N0) bit rate, and activity factor of the jth user, respectively. Multiplying Ior by (1+i) gives [Ior+Ior(i)] where Ior(i)=Ioc thereby allowing both intra-cell and inter-cell interference to be accounted for in ηUL. As may be seen from Equation 1, when ηUL tends to one, noise rise tends to infinity.
- Once ηUL is calculated, noise rise is obtained according to:
-
- In
FIG. 1 , steps for monitoring congestion in the UL based on UE measurements in a CDMA system having MUD capabilities are shown and indicated generally withreference number 10. - The method begins with
step 12 by calculating the UL load factor (ηUL) preferably usingequation 2, as explained above. Instep 14,Equation 3 is preferably used to calculate the noise rise, as also explained above. The value of noise rise is proportional to congestion and is therefore evaluated instep 16 to determine whether congestion relieving measures should be implemented. If the value of noise rise is above a predetermined value, congestion relieving measures are implemented (step 18). The predetermined value of noise rise that is selected for triggering the congestion relieving measures may be any value. By way of example, in one embodiment, the predetermined value is between about 6dB and about 10dB. - If, in contrast, the value of noise rise is below the predetermined value, the method may start over at
step 12. The method may start over atstep 12 at a predetermined time interval. The predetermined time interval may be any amount of time, as desired. By way of example, in one embodiment, the time interval is between about 3 seconds to about 5 seconds. - In another embodiment of the invention, UL congestion detection may be based on RAN measurements. In this embodiment, both Ioc and Ior and both
α UL andβ UL may be defined by reading measurements available at the base station (BS). Therefore, in contrast to the first embodiment, ηUL and noise rise may be calculated without using a predetermined value to obtain Ioc. - More specifically, ηUL is obtained according to:
-
- where the noise floor is again all noise that is not related to the system and the total perceived interference comprises all non-cancelled interference at the receiver. Since the elements needed to calculate total perceived power are known, the total perceived power may be calculated according to (1−
α UL)Ior+(1+β UL)Ioc thereby allowing ηUL to be calculated according to: -
- Once ηUL is obtained, the effective noise rise is obtained according to:
-
- In
FIG. 2 , steps for measuring and avoiding congestion in the UL based on RAN measurements in a CDMA system having MUD capabilities are shown and indicated generally withreference number 50. - The
first step 52, is to measure the noise floor. Then, instep 54, to calculate ηUL preferably according toEquation 5, as explained above, where Ioc, Ior,α UL andβ UL are defined by reading measurements available at the BS. In an alternate embodiment, however, the ratioα UL may be calculated according to: -
- In that embodiment,
β UL is considered negligible thereby eliminating the need for it to be read from the BS receiver. The additional parameters shown in Equation 7 are identified and defined from measurements taken at the BS receiver. By way of explanation, the additional parameters included in Equation 7 are Received Code Power for User i (Rx_Code_Poweri), Spreading Factor for User i (SFi), and Number of Active Codes in the Timeslot (M). - Once ηUL is obtained, noise rise is calculated according to
Equation 6 instep 56. As with the embodiment shown inFIG. 1 , the value of noise rise is proportional to congestion. Therefore, the value of noise rise is evaluated instep 58 to determine whether congestion relieving measures should be implemented. If the value of noise rise is above a predetermined value, congestion relieving measures are implemented (step 60). Alternatively, if the value of noise rise is below the predetermined value, the method may start over atstep 52 at a predetermined time interval. As with the embodiment described in conjunction withFIG. 1 , the predetermined values of noise rise and time interval may be any values, as desired. - The implementation of congestion relieving measures may be accomplished in a variety of ways. For example, the signal-to-noise ratio (Eb/N0) target of certain users may be reduced thereby forcing those users to reduce their transmission power. A drawback of this approach, however, is that those users will experience errors in the information transmitted and the quality of the link is greatly reduced.
- A preferred method for relieving congestion is to reduce the data transmission rate of a particular user or users. Users determine their transmission power depending on the data transmission rate, spreading factor gain and maximum transmission power and path loss. Therefore, reducing the data transmission rate of a particular user, which implicitly reduces power, allows the same signal-to-noise ratio to be achieved with the same spreading gain, but with less power. Furthermore, in WCDMA TDD systems, reducing the data transmission rate implies that a certain user is not transmitting at all in a timeslot thereby providing the additional benefit of relieving congestion for that timeslot.
- The preferred method for relieving congestion limits data transmission rate at the source; therefore no retransmissions are required. The selection of the user or users to whom the rates will be reduced is made by considering the transmitted power, received power and class of service. Those factors are considered for each user and may be considered individually, collectively or as a particular combination thereof, as desired. The user or users that contribute the most to the interference and have the lowest service class priority are preferably chosen as candidates for data rate reduction.
- The preferred method for relieving congestion is shown in
FIG. 3 and indicated generally withreference numeral 100. To begin, transmission power, received power and class of service are determined for each user insteps step 108, each user's contribution to noise rise is calculated. As explained, noise rise may be calculated according toEquation 3 orEquation 6, as desired. - In
step 110, the user that collectively contributes the most to the noise rise and has the lowest service priority is selected. To determine the selected user, a predetermined weighting factor may be used for each parameter. It is important to note that any value may be used for the weighting factor so that the influence of priority and noise contribution in selecting a user may be adjusted as desired. Furthermore it may be desirable to use only one of those parameters or, alternatively, it may be desirable to use additional parameters which, like noise contribution and priority, may be weighted as desired. The criteria for selecting a user is completely flexible and may be any criteria which accurately identifies users having data transmission rates that may be reduced so as to reduce congestion. Therefore, the selected user may, for example, be determined according to: -
User_selected=W1(priority)+W2(noise contribution) Equation 8 - In
step 112, the data transmission rate of the selected user is reduced. Instep 113, the amount of congestion is evaluated to determine whether congestion has been relieved. If the corresponding reduction in the noise rise is sufficient to reduce the value of noise rise below the predetermined value at which congestion is detected, the method ends and congestion monitoring, as described in conjunction withFIGS. 1 and 2 , may continue (step 114). Alternatively, if the congestion has not been relieved so that the value of noise rise is below the predetermined value, congestion still exists and themethod 100 returns to step 110 or 102, as desired, and continues until the congestion is relieved. - Referring now to
FIG. 4 , asystem 200 is shown for controlling congestion in the UL based on UE measurements. Insystem 200, congestion in the UL is monitored and controlled using UE measurements. Thesystem 200 comprises at least oneUE 202, a BS or node-B 214 and aradio network controller 210. - The UE comprises a
receiver 203 having MUD capabilities, an Ior measuringdevice 204 and an Ior signaling device 206. The Ior measuringdevice 204 utilizes information available at theUE 202 to measure the amount of interference generated by the system within the cell in which theUE 202 is currently located. As previously explained, that type of interference is referred to as intra-cell interference (Ior). - The BS or node-
B 214 includes areceiver 205 having a MUD and an Ior signal receiver 208. The Ior measured by measuringdevice 204 is transmitted from the Ior signaling device 206 of theUE 202 to the Ior signal receiver 208 of the BS or node-B 214. The BS or node-B 214 communicates the Ior to a radio network controller (RNC) 210 comprising a radio resource management (RRM)device 212. TheRRM 212, in conjunction with the BS or node-B 214, if needed, processes Ior so that the total interference, as affected by the MUD(s) 203, 205, may be obtained. As explained above, the total interference may be obtained using Ior,α UL,β UL and i. - Once the total interference is obtained, ηUL and noise rise is also obtained. If the noise rise is above a predetermined value, each users' contribution to the noise rise is measured. Preferably, each users' transmission power, received power and class of service are also measured. The data transmission rate of the user currently having the highest contribution to noise rise and the lowest class of service is reduced as needed until the overall noise rise falls below the predetermined value. In other words, if reducing the data transmission rate of what was the highest contributor to noise rise is not sufficient to reduce noise rise to below the predetermined value, the method continues by recalculating each users' noise rise contribution and reducing the data transmission rate of the highest contributor. Alternatively, the method may continue by using the current user calculations and simply reduce the rate of the next highest contributor.
- In
FIG. 5 , another embodiment of a system for controlling congestion in the UL is shown and indicated generally withreference numeral 300. Insystem 300, congestion in the UL is monitored and controlled using RAN measurements. Thesystem 300 comprises at least oneUE 301, a BS or node-B 306 and aRNC 308. - The
UE 301 comprises areceiver 303 having MUD capabilities. The BS or node-B 306 includes areceiver 305 having MUD capabilities, an Ior measuringdevice 302 and an Ioc measuringdevice 304. The BS or node-B 306 communicates the Ior and Ioc to a radio network controller (RNC) 308 comprising a radio resource management (RRM)device 310. TheRRM 310, in conjunction with the BS or node-B 306, if needed, processes Ior and Ioc so that the total interference, as affected by the MUD(s) 303, 305, may be obtained. As explained above, the total interference may be obtained using Ior, Ioc,α UL, andβ UL. - Once the total interference is obtained, ηUL and noise rise is also obtained. If the noise rise is above a predetermined value, each users' contribution to the noise rise is measured. Preferably, each users' transmission power, received power and class of service is also measured. The data transmission rate of the user currently having the highest contribution to noise rise and the lowest class of service is reduced as needed until the overall noise rise falls below the predetermined value, as explained in connection with
FIG. 4 . - Although the present invention has been described in detail, it is to be understood that the invention is not limited thereto, and that various changes may be made therein without departing from the spirit and scope of the invention, which is defined by the attached claims.
Claims (8)
1. A system for controlling congestion in a code division multiple access (CDMA) system with multi-user detection capabilities, comprising:
at least one user equipment including:
a receiver having multi-user detection capabilities;
a base station including:
a receiver having multi-user detection capabilities;
an intra-cell interference measuring device; and
an inter-cell interference measuring device; and
a radio network controller including:
a radio resource management device configured to control congestion based on measurements taken by the base station.
2. The system of claim 1 , wherein the system is configured to:
calculate a noise rise value that is indicative of interference in the CDMA system;
monitor the noise rise value to detect congestion; and
implement congestion relieving measures on a condition that congestion is detected,
whereby the system controls congestion.
3. A system for controlling congestion in a code division multiple access (CDMA) system with multi-user detection capabilities, comprising:
at least one user equipment including:
a receiver having multi-user detection capabilities;
an intra-cell interference measuring device; and
an intra-cell interference signaling device configured to send a signal that is indicative of intra-cell interference to a base station;
the base station including:
a receiver having multi-user detection capabilities; and
an intra-cell interference signal receiver configured to receive the signal sent by the intra-cell interference signaling device; and
a radio network controller including:
a radio resource management device configured to control congestion based on measurements taken by the at least one user equipment.
4. The system of claim 3 , wherein the system is configured to:
calculate a noise rise value that is indicative of interference in the CDMA system;
monitor the noise rise value to detect congestion; and
implement congestion relieving measures on a condition that congestion is detected,
whereby the system controls congestion.
5. A system for controlling congestion in a code division multiple access (CDMA) system with multi-user detection capabilities, comprising:
at least one user equipment;
a base station including:
a receiver having multi-user detection capabilities;
an intra-cell interference measuring device; and
an inter-cell interference measuring device; and
a radio network controller including:
a radio resource management device configured to:
calculate a noise rise value that is indicative of interference in the CDMA system;
monitor the noise rise value to detect congestion; and
implement congestion relieving measures on a condition that congestion is detected,
whereby the radio resource management device controls congestion.
6. A system for controlling uplink congestion in a code division multiple access (CDMA) system with multi-user detection capabilities, comprising:
a base station including:
a receiver having multi-user detection capabilities; and
an inter-cell interference measuring device;
at least one user equipment including:
a receiver having multi-user detection capabilities;
an intra-cell interference measuring device; and
an intra-cell interference signaling device configured to send a signal that is indicative of intra-cell interference to the base station; and
a radio network controller (RNC) including:
a radio resource management device configured to control congestion based on the intra-cell interference signal from the at least one user equipment and the inter-cell interference measured by the base station.
7. The system of claim 6 , wherein the RNC is configured to:
determine a class of service for each user equipment;
calculate a contribution to noise rise for each user equipment;
select a user equipment that is currently contributing the most to noise rise and has a lowest class of service; and
reduce a data transmission rate of the selected user equipment,
whereby the RNC controls congestion.
8. The system of claim 6 , wherein the RNC is configured to calculate a noise rise value based on at least one user equipment's measurements of intra-cell interference, and wherein inter-cell interference is taken into account by a predetermined value for a ratio of inter-cell interference to intra-cell interference.
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US14/087,426 US20140153395A1 (en) | 2002-05-24 | 2013-11-22 | User equipment in a congestion controlled cdma system |
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US38302502P | 2002-05-24 | 2002-05-24 | |
US10/265,046 US7313091B2 (en) | 2002-05-24 | 2002-10-04 | Method and system for control of congestion in CDMA systems |
US12/004,219 US8605577B2 (en) | 2002-05-24 | 2007-12-20 | User equipment in a congestion controlled CDMA system |
US14/087,426 US20140153395A1 (en) | 2002-05-24 | 2013-11-22 | User equipment in a congestion controlled cdma system |
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US12/004,219 Continuation US8605577B2 (en) | 2002-05-24 | 2007-12-20 | User equipment in a congestion controlled CDMA system |
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US12/004,219 Expired - Fee Related US8605577B2 (en) | 2002-05-24 | 2007-12-20 | User equipment in a congestion controlled CDMA system |
US14/087,426 Abandoned US20140153395A1 (en) | 2002-05-24 | 2013-11-22 | User equipment in a congestion controlled cdma system |
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US12/004,219 Expired - Fee Related US8605577B2 (en) | 2002-05-24 | 2007-12-20 | User equipment in a congestion controlled CDMA system |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2003103183A1 (en) * | 2002-06-04 | 2003-12-11 | Nokia Corporation | Power based radio resource management |
ITTO20020824A1 (en) * | 2002-09-20 | 2004-03-21 | Telecom Italia Lab Spa | PROCEDURE FOR PROVIDING TELECOMMUNICATIONS SERVICES, IT SYSTEM AND IT PRODUCT |
US7010329B2 (en) * | 2003-03-11 | 2006-03-07 | Interdigital Technology Corp. | System and method for battery conservation with assistance from the network and radio resource management |
JP4662074B2 (en) * | 2004-07-27 | 2011-03-30 | 日本電気株式会社 | UL radio resource control method, base station apparatus, and radio network control apparatus |
US7724656B2 (en) * | 2005-01-14 | 2010-05-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Uplink congestion detection and control between nodes in a radio access network |
FI20055469A0 (en) * | 2005-09-02 | 2005-09-02 | Nokia Corp | Procedure and arrangements for controlling radio resources |
US9401843B2 (en) | 2006-01-27 | 2016-07-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for reverse link control in a wireless communication network as a function of reverse link load characteristic |
KR100770941B1 (en) | 2006-03-17 | 2007-10-26 | 에스케이 텔레콤주식회사 | System for controlling congestion of mobile communication network having base station and rado network controller, and method therefor |
KR100764482B1 (en) * | 2006-03-28 | 2007-10-09 | 대한민국 | Nematocides containing plant extracts and components isolated from Kaempferia galanga for the control of nematode |
US8358633B1 (en) | 2006-11-08 | 2013-01-22 | Sprint Spectrum L.P. | Dynamic determination of EV-DO control-channel bit rate based on forward-link timeslot utilization |
WO2009005420A1 (en) * | 2007-06-29 | 2009-01-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for noise floor and interference estimation |
EP2294877B1 (en) * | 2008-07-01 | 2015-10-21 | Telefonaktiebolaget L M Ericsson (PUBL) | Cellular congestion and admission control based on ringing tones in unanswered calls |
US8160034B1 (en) * | 2008-09-09 | 2012-04-17 | Sprint Spectrum L.P. | Dynamic determination of EV-DO control-channel bit rate based on forward-link-timeslot utilization, control-channel occupancy, and amount of buffered forward-link traffic data |
WO2010052551A2 (en) * | 2008-11-05 | 2010-05-14 | Nokia Corporation | Priority-based fairness and interference signalling technique in a flexible spectrum use wireless communication system |
BR112012005157A2 (en) * | 2009-09-08 | 2016-05-03 | Ericsson Telefon Ab L M | method and arrangement for estimating noise increase in a wireless communication system, and base station |
US9055500B2 (en) * | 2010-05-18 | 2015-06-09 | Telefonaktiebolaget L M Ericsson (Publ) | Load estimation in softer handover |
CN102934478B (en) * | 2010-06-10 | 2016-03-16 | 瑞典爱立信有限公司 | Load in Pre-FDE system is estimated |
US9020520B2 (en) | 2010-09-20 | 2015-04-28 | Telefonaktiebolaget L M Ericsson (Publ) | Reducing interference in a radio access network |
EP2622751B1 (en) * | 2010-10-01 | 2017-09-13 | Telefonaktiebolaget LM Ericsson (publ) | Load estimation in frequency domain pre-equalization systems |
US9544810B2 (en) | 2011-11-14 | 2017-01-10 | T-Mobile Usa, Inc. | Device-based architecture for self organizing networks |
CN102404829B (en) * | 2011-12-07 | 2016-08-10 | 华为技术有限公司 | The method and device that power controls |
US8737375B2 (en) | 2012-07-25 | 2014-05-27 | At&T Mobility Ii Llc | Code planning for wireless communications |
US8565771B1 (en) | 2012-08-23 | 2013-10-22 | At&T Mobility Ii Llc | Handover relation identification utilizing network events |
US9247548B2 (en) | 2012-09-24 | 2016-01-26 | Blackberry Limited | Data service level uplink data flow control |
US9301172B2 (en) | 2012-10-19 | 2016-03-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method, apparatus, and system for interference and noise estimation |
US8942128B2 (en) * | 2012-11-27 | 2015-01-27 | At&T Mobility Ii Llc | Detection and prevention of heavy congestion in a wireless network |
US9288716B2 (en) | 2012-11-30 | 2016-03-15 | At&T Mobility Ii Llc | Resource management in a wireless communications network |
US9001686B2 (en) * | 2013-03-29 | 2015-04-07 | Telefonaktiebolaget L M Ericsson (Publ) | Interference estimation with TDM |
EP2897400A1 (en) * | 2014-01-20 | 2015-07-22 | Vodafone IP Licensing limited | Congestion detection |
CN109302207B (en) * | 2018-11-30 | 2020-01-07 | 维沃移动通信有限公司 | Parameter setting method and mobile terminal |
US10834608B1 (en) | 2019-07-16 | 2020-11-10 | At&T Intellectual Property I, L.P. | Facilitating model-driven automated cell allocation in fifth generation (5G) or other advanced networks |
US11832294B2 (en) | 2021-12-02 | 2023-11-28 | At&T Intellectual Property I, L.P. | Facilitating assignment of root sequence indexes while minimizing network changes |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6128506A (en) * | 1997-09-24 | 2000-10-03 | Telefonaktiebolaget Lm Ericsson | Integrated power control and congestion control in a communication system |
US6850500B2 (en) * | 2001-05-15 | 2005-02-01 | Interdigital Technology Corporation | Transmission power level estimation |
US6985700B1 (en) * | 1999-09-17 | 2006-01-10 | Nokia Corporatiion | Power estimation method |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA946674B (en) * | 1993-09-08 | 1995-05-02 | Qualcomm Inc | Method and apparatus for determining the transmission data rate in a multi-user communication system |
US5481533A (en) * | 1994-05-12 | 1996-01-02 | Bell Communications Research, Inc. | Hybrid intra-cell TDMA/inter-cell CDMA for wireless networks |
FR2754123B1 (en) * | 1996-10-01 | 1999-01-08 | Alsthom Cge Alcatel | TRAFFIC MANAGEMENT AND CONGESTION CONTROL SYSTEM FOR PACKET-BASED NETWORKS |
FI964707A (en) | 1996-11-26 | 1998-05-27 | Nokia Telecommunications Oy | Method for load control and radio system |
US6069885A (en) * | 1996-12-30 | 2000-05-30 | At&T Corp | Method and apparatus for providing high speed services using a wireless communications system |
US5799243A (en) | 1996-12-30 | 1998-08-25 | Nokia Telecommunications Oy | Cellular radio system and a method for measuring the interference level |
US6396867B1 (en) | 1997-04-25 | 2002-05-28 | Qualcomm Incorporated | Method and apparatus for forward link power control |
US6044103A (en) | 1997-06-17 | 2000-03-28 | Qualcomm Inc. | Reduced peak-to-average amplitude dual channel link |
US6262980B1 (en) * | 1997-12-02 | 2001-07-17 | At&T Corp | Dynamic resource allocation method and apparatus for broadband services in a wireless communications system |
US6895245B2 (en) | 1998-03-06 | 2005-05-17 | Telefonaktiebolaget Lm Ericssion(Publ) | Telecommunications interexchange measurement transfer |
US6233222B1 (en) * | 1998-03-06 | 2001-05-15 | Telefonaktiebolaget Lm Ericsson | Telecommunications inter-exchange congestion control |
JP2000022628A (en) * | 1998-07-01 | 2000-01-21 | Matsushita Electric Ind Co Ltd | Communication method and communication system |
JP4358994B2 (en) * | 1998-12-18 | 2009-11-04 | ノキア コーポレイション | Traffic load control method for telecommunication network |
SE515986C2 (en) * | 1999-12-10 | 2001-11-05 | Ericsson Telefon Ab L M | Procedure in a telecommunications system |
JP2001174727A (en) | 1999-12-13 | 2001-06-29 | Ricoh Co Ltd | Optical scanner and image forming device |
US6393276B1 (en) | 2000-01-12 | 2002-05-21 | Telefonaktiebolaget Lm Ericsson | Mobile station assisted forward link open loop power and rate control in a CDMA system |
GB2358551B (en) * | 2000-01-19 | 2004-01-07 | Motorola Ltd | A packet scheduler and method therefor |
KR100465902B1 (en) | 2000-02-02 | 2005-01-13 | 엔티티 도꼬모 인코퍼레이티드 | Single-carrier/ds-cdma packet transmitting method |
GB2362785B (en) | 2000-05-27 | 2004-05-05 | Motorola Inc | Communication system and method of administering connections therein |
US20020187788A1 (en) * | 2001-06-07 | 2002-12-12 | Mckay Charles Laurence | Mobile communications system |
ATE387817T1 (en) * | 2002-01-15 | 2008-03-15 | Koninkl Kpn Nv | METHOD AND SYSTEM FOR PLANNING AND/OR ESTIMATING CELL CAPACITY IN CDMA RADIO NETWORKS |
US7406065B2 (en) * | 2002-03-14 | 2008-07-29 | Qualcomm, Incorporated | Method and apparatus for reducing inter-channel interference in a wireless communication system |
-
2002
- 2002-10-04 US US10/265,046 patent/US7313091B2/en not_active Expired - Fee Related
-
2003
- 2003-05-15 ES ES03731197T patent/ES2271589T3/en not_active Expired - Lifetime
- 2003-05-15 AU AU2003241461A patent/AU2003241461A1/en not_active Abandoned
- 2003-05-15 DE DE60308363T patent/DE60308363T2/en not_active Expired - Lifetime
- 2003-05-15 AT AT03731197T patent/ATE339864T1/en not_active IP Right Cessation
- 2003-05-15 EP EP09155047A patent/EP2063564A1/en not_active Withdrawn
- 2003-05-15 CN CNB038116634A patent/CN100521825C/en not_active Expired - Fee Related
- 2003-05-15 CA CA002486761A patent/CA2486761A1/en not_active Abandoned
- 2003-05-15 WO PCT/US2003/015305 patent/WO2003101126A1/en active IP Right Grant
- 2003-05-15 AT AT06120463T patent/ATE431021T1/en not_active IP Right Cessation
- 2003-05-15 DE DE60327566T patent/DE60327566D1/en not_active Expired - Fee Related
- 2003-05-15 KR KR10-2004-7018846A patent/KR20050007420A/en active IP Right Grant
- 2003-05-15 EP EP03731197A patent/EP1510082B1/en not_active Expired - Lifetime
- 2003-05-15 JP JP2004507267A patent/JP4282596B2/en not_active Expired - Fee Related
- 2003-05-15 KR KR1020057015808A patent/KR100919040B1/en not_active IP Right Cessation
- 2003-05-16 TW TW092113395A patent/TWI247501B/en not_active IP Right Cessation
- 2003-05-16 TW TW095117375A patent/TWI323100B/en not_active IP Right Cessation
- 2003-05-16 TW TW093104003A patent/TW200501644A/en unknown
-
2004
- 2004-12-09 NO NO20045389A patent/NO20045389L/en unknown
-
2007
- 2007-12-20 US US12/004,219 patent/US8605577B2/en not_active Expired - Fee Related
-
2013
- 2013-11-22 US US14/087,426 patent/US20140153395A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6128506A (en) * | 1997-09-24 | 2000-10-03 | Telefonaktiebolaget Lm Ericsson | Integrated power control and congestion control in a communication system |
US6985700B1 (en) * | 1999-09-17 | 2006-01-10 | Nokia Corporatiion | Power estimation method |
US6850500B2 (en) * | 2001-05-15 | 2005-02-01 | Interdigital Technology Corporation | Transmission power level estimation |
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CN1656825A (en) | 2005-08-17 |
US7313091B2 (en) | 2007-12-25 |
CA2486761A1 (en) | 2003-12-04 |
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