System and method for detecting active user equipments
First Claim
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1. A method of detecting active user equipments in a random access transmission system, the method comprising:
- receiving an aggregate signal containing a sum of active pilots transmitted over active resource units among a plurality of potential resource units via random access transmissions by the active user equipments;
detecting the active pilots from the received aggregate signal; and
respectively associating the active pilots with the active user equipments according to a pilot-to-user equipment mapping.
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Abstract
Disclosed herein are an active resource unit detector and a method of use thereof. An embodiment method of detecting active resource units among a plurality of potential resource units includes receiving an aggregate signal containing active pilots transmitted over the active resource units via random access transmissions. The active pilots are then detected and respectively associated with the active resource units according to a pilot-to-resource unit mapping.
12 Citations
37 Claims
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1. A method of detecting active user equipments in a random access transmission system, the method comprising:
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receiving an aggregate signal containing a sum of active pilots transmitted over active resource units among a plurality of potential resource units via random access transmissions by the active user equipments; detecting the active pilots from the received aggregate signal; and respectively associating the active pilots with the active user equipments according to a pilot-to-user equipment mapping. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An active user equipment detector, comprising:
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a memory configured to store a plurality of potential pilots respectively corresponding to at least one potential user equipment of a plurality of potential user equipments; and a pilot detector having a processor coupled to the memory and configured to; receive an aggregate signal over a plurality of active resource units among a plurality of potential resource units, wherein the aggregate signal contains a sum of active pilots of the plurality of potential pilots, for respective random access transmissions by active user equipments, and respectively associate the active pilots from the received aggregate signal to at least one corresponding active user equipment of the active user equipments. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A receiver for random access transmissions, comprising:
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a memory configured to store; a plurality of potential pilots that respectively correspond to at least one user equipment of a plurality of potential user equipments, a pilot list of potentially active pilots, wherein the pilot list contains a subset of the plurality of potential pilots, and a user equipment list of potentially active user equipments, wherein the user equipment list contains a subset of the plurality of potential user equipments; and a processor coupled to the memory and configured to; receive an aggregate signal containing a sum of active pilot signals for respective random access transmissions from active user equipments, detect the active pilot signals from the received aggregate signal, match the active pilot signals with the potentially active pilots in the pilot list, associate the potentially active pilots with a narrowed set of respectively corresponding user equipments to identify potentially active user equipments, estimate channels corresponding to the potentially active user equipments, and receive and decode the aggregate signal according to the potentially active user equipments and respective corresponding channel estimations. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification