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US 11,388,664 B2Granted
Searching for control channels in a wireless network
AssigneeWireless Future Technologies Inc.
InventorsFrank Frederiksen, Troels Emil Kolding
Life of this patent
Estimating the term…
Abstract
A user equipment (UE) may receive an OFDM signal having control channel elements (CCEs). The CCEs may be arranged in levels where a first level aggregates less CCEs than a second level. A processor may search for a control channel from control channel candidates that is comprised of the CCEs. A limited number of CCEs may be searched on the first level.
Claims19
A method of operating a base station the method comprising:
- allocating control channel information to a user equipment (UE), the control channel information including control channels represented by nodes of a tree structure, the control channels decodable by the UE using an identifier, the tree structure having three or more levels, the nodes of the tree structure at a highest level of the tree structure comprising a single control channel element and nodes of the tree structure at lower levels of the tree structure comprising a plurality of consecutive control channel elements, wherein allocations of control channels at the highest level of the tree structure are limited and allocations of control channels increase more the lower the level of the three or more levels of the tree structure;
- and
- transmitting the control channel information to the UE.
A base station comprising:
- a processor operable to allocate control channel information for a user equipment (UE), the control channel information including control channels represented by nodes of a tree structure, the control channels decodable by the UE using an identifier, the tree structure having three or more levels, the nodes of the tree structure at a highest level of the tree structure comprising a single control channel element and nodes of the tree structure at lower levels of the tree structure comprising a plurality of consecutive control channel elements, wherein allocations of control channels at the highest level of the tree structure are limited and allocations of control channels increase more the lower the level of the three or more levels of the tree structure;
- and
- a transmitter operable to transmit the control channel information to the UE.
A user equipment (UE) comprising:
- a receiver operable to receive control channel information;
- and
- circuitry operable to search for a control channel in the control channel information by decoding control channels represented by nodes of a tree structure using an identifier, the tree structure having three or more levels, the nodes of the tree structure at a highest level of the tree structure comprising a single control channel element and nodes of the tree structure at lower levels of the tree structure comprising a plurality of consecutive control channel elements, wherein control channel allocations at the highest level of the tree structure are limited and control channel allocations increase more the lower the level of the three or more levels of the tree structure.
Dependencies are inferred from the claim text.