Channel structures for a quasi-orthogonal multiple-access communication system
First Claim
1. A method of assigning system resources in a communication system, comprising:
- scheduling a L quantity of terminals for data transmission;
assigning the L quantity of terminals with channels in at least two channel sets, wherein each channel set comprises a plurality of channels and is associated with a specific mapping of the plurality of channels to system resources available for data transmission, wherein the mapping for each channel set is pseudo-random with respect to the mapping for each remaining one of the at least two channel sets for at least a subset of the plurality of channels, and the mapping of the subset of the plurality of channels uses a different overlapping scheme than a mapping of at least one other subset of the plurality of channels in the same channel set, wherein each channel set is defined based on a channel tree and wherein each channel in the channel tree that is assigned to a terminal of the L quantity of terminals restricts at least on other channel in the same channel tree from being assigned; and
transmitting the plurality of channels to multiple users in each time-frequency block using a T quantity of antennas, wherein the L quantity is less than or equal to the T quantity.
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Abstract
A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.
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Citations
40 Claims
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1. A method of assigning system resources in a communication system, comprising:
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scheduling a L quantity of terminals for data transmission; assigning the L quantity of terminals with channels in at least two channel sets, wherein each channel set comprises a plurality of channels and is associated with a specific mapping of the plurality of channels to system resources available for data transmission, wherein the mapping for each channel set is pseudo-random with respect to the mapping for each remaining one of the at least two channel sets for at least a subset of the plurality of channels, and the mapping of the subset of the plurality of channels uses a different overlapping scheme than a mapping of at least one other subset of the plurality of channels in the same channel set, wherein each channel set is defined based on a channel tree and wherein each channel in the channel tree that is assigned to a terminal of the L quantity of terminals restricts at least on other channel in the same channel tree from being assigned; and transmitting the plurality of channels to multiple users in each time-frequency block using a T quantity of antennas, wherein the L quantity is less than or equal to the T quantity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus of assigning system resources in a communication system, comprising:
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a scheduler for scheduling a L quantity of terminals for data transmission; a controller for assigning the L quantity of terminals with channels in at least two channel sets, wherein each channel set comprises a plurality of channels and is associated with a specific mapping of the plurality of channels to system resources available for data transmission, wherein the mapping for each channel set is pseudo-random with respect to the mapping for each remaining one of the at least two channel sets for at least a subset of the plurality of channels, and the mapping of the subset of the plurality of channels uses a different overlapping scheme than a mapping of at least one other subset of the plurality of channels in the same channel set, wherein each channel set is defined based on a channel tree and wherein each channel in the channel tree that is assigned to a terminal of the L quantity of terminals restricts at least on other channel in the same channel tree from being assigned; and a transmitter for transmitting the plurality of channels to multiple users in each time-frequency block using a T quantity of antennas, wherein the L quantity is less than or equal to the T quantity. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus of assigning system resources in a communication system, comprising:
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means for scheduling a L quantity of terminals for data transmission; means for assigning the L quantity of terminals with channels in at least two channel sets, wherein each channel set comprises a plurality of channels and is associated with a specific mapping of the plurality of channels to system resources available for data transmission, wherein the mapping for each channel set is pseudo-random with respect to the mapping for each remaining one of the at least two channel sets for at least a subset of the plurality of channels, and the mapping of the subset of the plurality of channels uses a different overlapping scheme than a mapping of at least one other subset of the plurality of channels in the same channel set, wherein each channel set is defined based on a channel tree and wherein each channel in the channel tree that is assigned to a terminal of the L quantity of terminals restricts at least on other channel in the same channel tree from being assigned; and means for transmitting the plurality of channels to multiple users in each time-frequency block using a T quantity of antennas, wherein the L quantity is less than or equal to the T quantity. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A non-transitory computer-readable medium storing a computer program, wherein execution of the computer program is for:
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scheduling a L quantity of terminals for data transmission; assigning the L quantity of terminals with channels in at least two channel sets, wherein each channel set comprises a plurality of channels and is associated with a specific mapping of the plurality of channels to system resources available for data transmission, wherein the mapping for each channel set is pseudo-random with respect to the mapping for each remaining one of the at least two channel sets for at least a subset of the plurality of channels, and the mapping of the subset of the plurality of channels uses a different overlapping scheme than a mapping of at least one other subset of the plurality of channels in the same channel set, wherein each channel set is defined based on a channel tree and wherein each channel in the channel tree that is assigned to a terminal of the L quantity of terminals restricts at least on other channel in the same channel tree from being assigned; and transmitting the plurality of channels to multiple users in each time-frequency block using a T quantity of antennas, wherein the L quantity is less than or equal to the T quantity. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification