Searching space and operation for enhanced PDCCH in LTE systems
First Claim
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1. A method of operating an enhanced node B (eNB) in a wireless communication network, the method comprising:
- partitioning a physical resource block (PRB) pair comprising a plurality of resource elements into at least a first resource unit partition and a second resource unit partition, wherein the first and second resource unit partitions are used to convey respective first and second portions of information for an enhanced physical downlink control channel (E-PDCCH), and wherein the first and second resource unit partitions exclude resource elements used for transmission of channel state information reference signals (CSI-RS) within the PRB pair;
transmitting, within the first resource unit partition, the first portion of E-PDCCH information and an associated demodulation reference signals (DMRS) using a first antenna port; and
transmitting, within the second resource unit partition, the second portion of E-PDCCH information and an associated DMRS using a second antenna port.
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Abstract
A method is provided for operating an eNB in a wireless communication network. The method comprises allocating, by the eNB, one or more resource units within one or more physical resource block pairs to a user equipment for transmitting enhanced control information.
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Citations
33 Claims
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1. A method of operating an enhanced node B (eNB) in a wireless communication network, the method comprising:
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partitioning a physical resource block (PRB) pair comprising a plurality of resource elements into at least a first resource unit partition and a second resource unit partition, wherein the first and second resource unit partitions are used to convey respective first and second portions of information for an enhanced physical downlink control channel (E-PDCCH), and wherein the first and second resource unit partitions exclude resource elements used for transmission of channel state information reference signals (CSI-RS) within the PRB pair; transmitting, within the first resource unit partition, the first portion of E-PDCCH information and an associated demodulation reference signals (DMRS) using a first antenna port; and transmitting, within the second resource unit partition, the second portion of E-PDCCH information and an associated DMRS using a second antenna port. - View Dependent Claims (2, 3, 4)
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5. A method of operating a network element in a wireless communication network, the method comprising:
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semi-statically providing, by the network element, a configuration of at least one resource region usable for transmission of an enhanced physical downlink control channel (E-PDCCH) to a user equipment (UE); dynamically allocating, by the network element, one or more enhanced control channel elements (eCCEs) in the at least one E-PDCCH resource region for transmitting the E-PDCCH to the UE; transmitting, by the network element, the E-PDCCH to the UE over the allocated eCCEs , and assigning, by the network element, two or more demodulation reference signal (DMRS) ports to each of the one or more eCCEs for E-PDCCH demodulation by the UE. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of operating a user equipment (UE) in a wireless communication network, the method comprising:
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receiving, by the UE, a configuration of at least one resource region usable for transmission of an enhanced physical downlink control channel (E-PDCCH); and detecting, by the UE, in each of a plurality of subframes, one or more E-PDCCHs for the UE over the configured at least one E-PDCCH resource region, wherein at least one of the E-PDCCHs is transmitted to the UE from a plurality of demodulation reference signal (DMRS) ports, wherein symbols of the at least one E-PDCCH are mapped to resource elements in the at least one E-PDCCH resource region that are not used for transmission of channel state information reference signals (CSI-RS) within a resource block over which E-PDCCH detection is performed by the UE. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of operating an enhanced node B (eNB) in a wireless communication network, the method comprising:
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partitioning a plurality of resource elements within a physical resource block (PRB) pair into a first resource unit partition associated with a first antenna port and a second resource unit partition associated with a second antenna port mapping symbols of an encoded Enhanced Physical Downlink Control Channel (E-PDCCH) to resource elements within either the first resource unit partition or the second resource unit partition, wherein the resource elements to which the E-PDCCH symbols are mapped exclude resource elements used for transmission of channel state information reference signals (CSI-RS) within the PRB pair; transmitting symbols associated with the first resource unit partition and a first demodulation reference signal (DMRS) on the first antenna port; and transmitting symbols associated with the second resource unit partition and a second DMRS on the second antenna port.
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33. A method of receiving an Enhanced Physical Downlink Control Channel (E-PDCCH), the method comprising:
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partitioning a plurality of resource elements within a received physical resource block (PRB) pair into a first resource unit partition associated with a first received demodulation reference signal (DMRS) and a second resource unit partition associated with a second received DMRS, wherein the first and the second resource unit partition exclude resource elements used for transmission of channel state reference signals (CSI-RS) within the PRB pair; performing first and second channel estimations based on the respective first and second received DMRS within the first and second resource unit partitions; demodulating symbols associated with the first and second resource unit partitions using the respective first and second channel estimations; and decoding the E-PDCCH using the demodulated symbols.
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Specification