Interference management for soft handoff and broadcast services in a wireless frequency hopping communication system
First Claim
1. A method of managing interference in a wireless frequency hopping (FH) communication system, comprising:
- obtaining a first FH function;
obtaining an identifier for a first traffic channel defined with the first FH function;
modifying a second FH function based on the first FH function and the identifier for the first traffic channel to obtain a modified second FH function, wherein the second FH function is modified such that a second traffic channel defined with the modified second FH function and the first traffic channel are orthogonal or have low correlation; and
using the second traffic channel for data transmission.
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Abstract
Techniques are provided to manage interference for soft handoff and broadcast services in a wireless frequency hopping communication system (e.g., an OFDMA system). These techniques may be used for the forward and reverse links. In a first scheme, an FH function ƒsho(r,T) is used for soft-handoff users, an FH function ƒs
46 Citations
30 Claims
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1. A method of managing interference in a wireless frequency hopping (FH) communication system, comprising:
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obtaining a first FH function;
obtaining an identifier for a first traffic channel defined with the first FH function;
modifying a second FH function based on the first FH function and the identifier for the first traffic channel to obtain a modified second FH function, wherein the second FH function is modified such that a second traffic channel defined with the modified second FH function and the first traffic channel are orthogonal or have low correlation; and
using the second traffic channel for data transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus in a wireless frequency hopping (FH) communication system, comprising:
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means for obtaining a first FH function;
means for obtaining an identifier for a first traffic channel defined with the first FH function;
means for modifying a second FH function based on the first FH function and the identifier for the first traffic channel to obtain a modified second FH function, wherein the second FH function is modified such that a second traffic channel defined with the modified second FH function and the first traffic channel are orthogonal or have low correlation; and
means for using the second traffic channel for data transmission.
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14. An apparatus in a wireless frequency hopping (FH) communication system, comprising:
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a processor operative to obtain a first FH function and an identifier for a first traffic channel defined with the first FH function, modify a second FH function based on the first FH function and the identifier for the first traffic channel to obtain a modified second FH function, an provide an FH sequence for a second traffic channel defined with the modified second FH function, wherein the second FH function is modified such that the second traffic channel and the first traffic channel are orthogonal or have low correlation; and
a switch operative to determine a particular one of a plurality of frequency subbands to use in each of a plurality of frequency hop periods based on the FH sequence for the second traffic channel. - View Dependent Claims (15, 16, 17, 18)
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19. A processor readable media for storing instructions operable to:
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obtain a first frequency hopping (FH) function;
obtain an identifier for a first traffic channel defined with the first FH function; and
modify a second FH function based on the first FH function and the identifier for the first traffic channel to obtain a modified second FH function, wherein the second FH function is modified such that a second traffic channel defined with the modified second FH function and the first traffic channel are orthogonal or have low correlation, and wherein the second traffic channel is used for data transmission on a forward link or reverse link.
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20. A method of managing interference in a wireless frequency hopping (FH) communication system, comprising:
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receiving an assignment of a first traffic channel defined with a first FH function;
using the first traffic channel for communication with a first base station;
receiving an assignment of a second traffic channel defined with a second FH function, wherein the first and second FH functions are orthogonal or have low correlation; and
using the second traffic channel for communication with the first base station and a second base station. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An apparatus in a wireless frequency hopping (FH) communication system, comprising:
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means for receiving an assignment of a first traffic channel defined with a first FH function;
means for using the first traffic channel for communication with a first base station;
means for receiving an assignment of a second traffic channel defined with a second FH function, wherein the first and second FH functions are orthogonal or have low correlation; and
means for using the second traffic channel for communication with the first base station and a second base station.
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27. An apparatus in a wireless frequency hopping (FH) communication system, comprising:
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a processor operative to receive an assignment of a first traffic channel defined with a first FH function and provide a first FH sequence for the first traffic channel, wherein the first traffic channel is used for communication with a first base station; and
a switch operative to determine a particular one of a plurality of frequency subbands to use in each of a first plurality of frequency hop periods based on the first FH sequence for the first traffic channel, and wherein the processor is further operative to receive an assignment of a second traffic channel defined with a second FH function and provide a second FH sequence for the second traffic channel, wherein the second traffic channel is used for communication with the first base station and a second base station, and wherein the switch is further operative to determine a particular one of a plurality of frequency subbands to use in each of a second plurality of frequency hop periods based on the second FH sequence for the second traffic channel.
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28. A method of managing interference in a wireless frequency hopping (FH) communication system, comprising:
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receiving a first transmission on a first traffic channel from a first base station, wherein the first traffic channel is defined with a first FH function associated with the first base station; and
receiving a second transmission on a second traffic channel from the first base station and a second base station, wherein the second traffic channel is defined with a second FH function, wherein a third FH function is associated with the second base station, wherein the second FH function is orthogonal to or has low correlation with both the first and third FH functions, and wherein the first FH function is pseudo-random with respect to the third FH function. - View Dependent Claims (29)
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30. An apparatus in a wireless frequency hopping (FH) communication system, comprising:
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means for receiving a first transmission on a first traffic channel from a first base station, wherein the first traffic channel is defined with a first FI function associated with the first base station; and
means for receiving a second transmission on a second traffic channel from the first base station and a second base station, wherein the second traffic channel is defined with a second FH function, wherein a third FI function is associated with the second base station, wherein the second FH function is orthogonal to or has low correlation with both the first and third FI functions, and wherein the first FI function is pseudo-random with respect to the third FH function.
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Specification