CA2437724A1 - Reverse rate control - Google Patents

Reverse rate control Download PDF

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Publication number
CA2437724A1
CA2437724A1 CA002437724A CA2437724A CA2437724A1 CA 2437724 A1 CA2437724 A1 CA 2437724A1 CA 002437724 A CA002437724 A CA 002437724A CA 2437724 A CA2437724 A CA 2437724A CA 2437724 A1 CA2437724 A1 CA 2437724A1
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CA
Canada
Prior art keywords
rate
mobile device
reverse
interference
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002437724A
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French (fr)
Other versions
CA2437724C (en
Inventor
Sae-Young Chung
Dae-Young Kim
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Ericsson EVDO Inc
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Individual
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Filing date
Publication date
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Publication of CA2437724A1 publication Critical patent/CA2437724A1/en
Application granted granted Critical
Publication of CA2437724C publication Critical patent/CA2437724C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • H04L1/0022—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy in which mode-switching is influenced by the user
    • 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
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70703—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference
    • 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
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link

Abstract

By controlling reverse rates among mobile stations to reduce reverse-link interference, reverse-link throughput can be increased

Claims (31)

1. A method comprising at a mobile wireless communication device operating in a cell, transmitting data to the sectors, and at the base station controlling the reverse data rate of the mobile device based on an estimated amount of interference the mobile device is causing to other sectors.
2. The method of claim 1 in which the estimated amount of interference is based on a forward-link SIR for the mobile device.
3. The method of claim 2 in which the forward-link SIR is averaged over a period of time.
4. The method of claim 1 in which the estimated amount of interference is based on pilot power from the mobile device received at the base station.
5. The method of claim 1 in which the estimated amount of interference is based on total power received from the mobile device at the base station.
6. The method of claim 1 in which the estimated amount of interference is based on the mobile device's request forward-link data rate.
7. The method of claim 6 in which the request data rate is averaged over a certain period of time
8. The method of claim 1 in which the reverse rate of the mobile device is set by the base station.
9. The method of claim 8 in which the reverse rate is set as a target rate based on the queue status of the mobile device.
10. The method of claim 8 in which the reverse rate is set as a target rate based on the status of the sector in which the mobile device is operating.
11. The method of claim 10 in which the status of the sector comprises a number of mobile devices.
12. The method of claim 10 in which the status of the sector comprises a reverse rate of other devices operating in the sector.
13. The method of claim 1 in which the reverse rate of the mobile device is set by the mobile device.
14. The method of claim 13 in which the reverse rate is set based on a determined rate limit.
15. The method of claim 14 in which the rate limit is communicated to the mobile device from the base station.
16. The method of claim 14 in which the reverse rate is limited by sending rate control bits from the base station to the mobile device.
17. The method of claim 13 in which the mobile device sets a value of MaxRate according to a message from the base station, the MaxRate being dependent on the current rate of the mobile device and given transition probabilities.
18. The method of claim 13 in which the mobile device sets a MaxRate deterministically.
19. The method of claim 1 in which the aggregate rate from all mobile devices in all sectors is maximized.
20. The method of claim 19 in which the rate of each mobile device is restricted by a condition.
21 The method of claim 20 in which the condition includes fairness among the mobile devices.
22. The method of claim 1 in which the aggregate rate from all mobile devices in the sector is maximized
23. The method of claim 22 in which the rate of each mobile device is restricted by a condition.
24. The method of claim 23 in which the condition includes fairness among the mobile devices.
25. A method comprising generating one or more reverse rate control bit or bits for each of several mobile devices operating in a sector of a cell, and controlling the reverse rates of the respective mobile devices based on the reveres rate control bits.
26. A method comprising at a mobile wireless communication device operating in a sector of a cell, transmitting data to the base station in the sector, and controlling its reverse data rate based on an estimated amount of interference the mobile device is causing to base stations in other sectors.
27. The method of claim 26 in which the estimated amount of interference is based on its forward-link SIR.
28. The method of claim 26 in which the estimated amount of interference is based on its forward-link rate.
29. The method of claim 26 in which the estimated amount of interference is based on its request forward-link data rate.
30. The method of claim 26 in which the estimated amount of interference is based on the received power from the base station.
31. The method of claim 26 in which the reverse rate is limited by a command from the base station.
CA2437724A 2001-02-07 2002-02-07 Reverse rate control Expired - Lifetime CA2437724C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/778,668 US6741862B2 (en) 2001-02-07 2001-02-07 Enhanced reverse-link rate control in wireless communication
US09/778,668 2001-02-07
PCT/US2002/003823 WO2002063781A2 (en) 2001-02-07 2002-02-07 Reverse rate control

Publications (2)

Publication Number Publication Date
CA2437724A1 true CA2437724A1 (en) 2002-08-15
CA2437724C CA2437724C (en) 2010-04-13

Family

ID=25114076

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2437724A Expired - Lifetime CA2437724C (en) 2001-02-07 2002-02-07 Reverse rate control

Country Status (3)

Country Link
US (1) US6741862B2 (en)
CA (1) CA2437724C (en)
WO (1) WO2002063781A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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