Methods, network nodes and user equipments in a wireless network for communicating an EPDCCH
First Claim
1. A method, performed by a network node of a wireless communication network, for communicating an enhanced Physical Downlink Control Channel (ePDCCH) to a user equipment (UE), the method comprisingtransmitting a configuration message to the UE, the configuration message comprising:
- an indication of a first mapping of the ePDCCH to resource elements belonging to a first ePDCCH set, where the resource elements of the first ePDCCH set are different from resource elements used for a first type of signal,an indication of an ePDCCH start symbol for the first ePDCCH set,an indication of a second mapping of the ePDCCH to resource elements belonging to a second ePDCCH set, where the resource elements of the second ePDCCH set are different from resource elements used for a second type of signal, andan indication of an ePDCCH start symbol for the second ePDCCH set;
selecting one of the first ePDCCH set or the second ePDCCH set for transmission of the ePDCCH to the UE according to a selection criterion;
allocating the ePDCCH to resource elements according to the selected set; and
transmitting the allocated ePDCCH to the UE.
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Abstract
A network node in a wireless communication network communicates an enhanced Physical Downlink Control Channel (ePDCCH) to a user equipment (UE). This begins with the transmission, to the UE, of a configuration message that indicates the mappings of eDPCCH onto resource elements for both a first eDPCCH set and a second eDPCCH set. The mapping for the first eDPCCH set avoids the use of resource elements already in use by a first type of signal (e.g., a Cell-Specific Reference Signal or CRS), whereas the mapping for the second eDPCCH set avoids the use of resource elements in use by a second type of signal. The choice of an eDPCCH set for transmitting data to a UE may then be dynamically made in order to avoid interference caused by the first or second types of signal.
7 Citations
24 Claims
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1. A method, performed by a network node of a wireless communication network, for communicating an enhanced Physical Downlink Control Channel (ePDCCH) to a user equipment (UE), the method comprising
transmitting a configuration message to the UE, the configuration message comprising: -
an indication of a first mapping of the ePDCCH to resource elements belonging to a first ePDCCH set, where the resource elements of the first ePDCCH set are different from resource elements used for a first type of signal, an indication of an ePDCCH start symbol for the first ePDCCH set, an indication of a second mapping of the ePDCCH to resource elements belonging to a second ePDCCH set, where the resource elements of the second ePDCCH set are different from resource elements used for a second type of signal, and an indication of an ePDCCH start symbol for the second ePDCCH set; selecting one of the first ePDCCH set or the second ePDCCH set for transmission of the ePDCCH to the UE according to a selection criterion; allocating the ePDCCH to resource elements according to the selected set; and transmitting the allocated ePDCCH to the UE. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A network node of a wireless communication network, configured for communicating an enhanced Physical Downlink Control Channel (ePDCCH) to a user equipment (UE), the network node comprising
a transmitting circuit adapted to transmit a configuration message to the UE, the configuration message comprising: -
an indication of a first mapping of the ePDCCH to resource elements belonging to a first ePDCCH set, where the resource elements of the first ePDCCH set are different from resource elements used for a first type of signal; an indication of an ePDCCH start symbol for the first ePDCCH set; an indication of a second mapping of the ePDCCH to resource elements belonging to a second ePDCCH set, where the resource elements of the second ePDCCH set are different from resource elements used for a second type of signal; and an indication of an ePDCCH start symbol for the second ePDCCH set; a selecting circuit adapted to select one of the first ePDCCH set or the second ePDCCH set for transmission of the ePDCCH to the UE according to a selection criterion; and an allocating circuit adapted to allocate the ePDCCH to resource elements according to the selected set, wherein the transmitting circuit is further arranged to transmit the allocated ePDCCH to the UE. - View Dependent Claims (11, 12, 13, 14)
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15. A method, performed by a user equipment (UE) in a wireless communication network, for communicating an enhanced Physical Downlink Control Channel (ePDCCH) with a network node, the method comprising:
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receiving a configuration message from the network node, the configuration message comprising; an indication of a first mapping of the ePDCCH to resource elements belonging to a first ePDCCH set, where the resource elements of the first ePDCCH set are different from resource elements used for a first type of signal, an indication of an ePDCCH start symbol for the first ePDCCH set, an indication of a second mapping of the ePDCCH to resource elements belonging to a second ePDCCH set, where the resource elements of the second ePDCCH set are different from resource elements used for a second type of signal, and an indication of an ePDCCH start symbol for the second ePDCCH set; receiving a message from the network node comprising an ePDCCH allocated to a selected one of the first ePDCCH set and the second ePDCCH set; decoding ePDCCH candidates according to the first mapping and decoding ePDCCH candidates according to the second mapping; detecting whether the ePDCCH was allocated to the first ePDCCH set or the second ePDCCH set. - View Dependent Claims (16, 17, 18, 19)
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20. A user equipment (UE) in a wireless communication network, configured for communicating an enhanced Physical Downlink Control Channel (ePDCCH) with a network node, the UE comprising:
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a receiving circuit adapted to receive; a configuration message from the network node, the configuration message comprising an indication of a first mapping of the ePDCCH to resource elements belonging to a first ePDCCH set, where the resource elements of the first ePDCCH set are different from resource elements used for a first type of signal, and an indication of a second mapping of the ePDCCH to resource elements belonging to a second ePDCCH set, where the resource elements of the second ePDCCH set are different from resource elements used for a second type of signal, and wherein the configuration message comprises an indication of an ePDCCH start symbol for the first ePDCCH set and an indication of an ePDCCH start symbol for the second ePDCCH set, and a message from the network node comprising an ePDCCH allocated to a selected one of the first ePDCCH set and the second ePDCCH set; a decoding circuit adapted to decode ePDCCH candidates according to the first mapping and to decode ePDCCH candidates according to the second mapping; and a detecting circuit adapted to detect whether the ePDCCH was allocated to the first ePDCCH set or to the second ePDCCH set. - View Dependent Claims (21, 22, 23, 24)
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Specification