Physical uplink shared channel demodulation reference signal design for uplink coordinated transmission in type II relay using a punctured demodulation reference signal
AssigneeBlackBerry Limited
InventorsYi Song, Yi Yu, Zhijun Cai, Dongsheng Yu, Chandra S. Bontu, Mo-Han Fong
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Abstract
A method is provided for providing an access node with a demodulation reference signal (DMRS). The method includes, when the UE and at least one relay node are present in a cell, the relay node transmitting the DMRS on a subset of a set of resource elements in which the UE transmits the DMRS.
Claims30
A method for providing an access node with a demodulation reference signal (DMRS), comprising:
- when a user equipment (UE) and at least one relay node are present in a cell, the relay node transmitting the DMRS on a subset of a set of resource elements in which the UE transmits the DMRS.
A relay node comprising:
- a processor configured such that, when a user equipment (UE) is present in a cell with the relay node, the relay node transmits a demodulation reference signal (DMRS) on a subset of a set of resource elements in which the UE transmits the DMRS.
A user equipment (UE) comprising:
- a processor configured such that, when a plurality of relay nodes are present in a cell with the UE, the UE transmits a demodulation reference signal (DMRS) on a first subset of a set of resource elements available to the UE and the relay nodes.
A method for providing an access node with a demodulation reference signal (DMRS) that was transmitted only by a user equipment (UE), comprising:
- when a plurality of relay nodes is present in a cell with the UE, the UE transmitting a demodulation reference signal (DMRS) on a first subset of a set of resource elements available to the UE and the relay nodes, wherein the UE transmit the DMRS on different subsets of the set of resource elements than the relay nodes, and wherein resource blocks containing the different subsets are transmitted synchronously.
An access node comprising:
- a processor configured such that when a user equipment (UE) and at least one relay node are present in a cell with the access node, the access node receives a demodulation reference signal (DMRS) that was transmitted only by the UE, the access node receives a combined DMRS that was transmitted by the UE and by the at least one relay node, each DMRS transmitted synchronously, and the access node derives channel estimates from each of the DMRS and the combined DMRS and uses the channel estimates to demodulate data and control information.
A method for providing an access node with a demodulation reference signal (DMRS), comprising:
- when a user equipment (UE) and at least one relay node are present in a cell with the access node, the access node receiving a demodulation reference signal (DMRS) that was transmitted only by the UE and receiving a combined DMRS that was transmitted by the UE and by the at least one relay node, each DMRS transmitted synchronously, and the access node deriving channel estimates from each of the DMRS and the combined DMRS and using the channel estimates to demodulate data and control information.
Dependencies are inferred from the claim text.