Physical downlink control channel for fifth-generation networks
View Patent ↗Disclosed herein are apparatuses, systems, and methods using or implementing a control channel (PDCCH) design. The PDCCH can occupy an initial number of OFDM symbols of a downlink subframe, while occupying less than the full system bandwidth. The PDCCH can be time division multiplexed (TDM) with a shared channel (PDSCH) or frequency division multiplexed (FDM) with a PDSCH. The PDCCH can further be multiplexed with another PDCCH in a contiguous or non-contiguous region. Resources allocated to the PDCCH can overlap or partially overlap resources allocated to the PDSCH. An Evolved Node-B (eNB) can provide configuration information for the PDCCH design in Radio Resource Control (RRC) signaling to a user equipment (UE), or through use of a Master Information Block (MIB) or System Information Block (SIB).
1. An apparatus for a User Equipment (UE), the apparatus comprising: processing circuitry; and memory,
wherein the processing circuitry is configured to:
receive, from an Evolved Node-B (eNB), configuration information indicating a number of first K orthogonal frequency division multiplexing (OFDM) symbols of a downlink subframe that are to include a physical downlink control channel (PDCCH), the PDCCH having a maximum duration of three OFDM symbols and is to start at a symbol of a slot of the downlink subframe based on a physical resource block (PRB) starting index;
receive information from the eNB indicating at least a value for K;
detect the PDCCH in subsequent downlink transmissions from the eNB, starting at an initial OFDM symbol for the downlink subframe;
detect a downlink shared channel at a subsequent OFDM symbol of the downlink subframe, the subsequent OFDM symbol having been determined based on the configuration information; and
process the PDCCH and the downlink shared channel, wherein the PDCCH is time-division multiplexed (TDM) with the downlink shared channel, and
wherein the downlink shared channel is detected in a same downlink subframe as the PDCCH, and
wherein the PDCCH occupies fewer physical resource blocks (PRBs) than a system bandwidth and is locatable at predetermined off-center locations of the system bandwidth, the predetermined off-center locations being a same location in each downlink subframe and configured by the configuration information.
2. A non-transitory machine readable medium that stores instructions for execution by one or more processors to perform operations for communication by a User Equipment (UE), the operations to configure the one or more processors to:
receive, from an Evolved Node-B (eNB), configuration information indicating a number of first K orthogonal frequency division multiplexing (OFDM) symbols of a downlink subframe that are to include a physical downlink control channel (PDCCH), the PDCCH having a maximum duration of three OFDM symbols and is to start at a symbol of a slot of the downlink subframe based on a physical resource block (PRB) starting index;
receive information from the eNB indicating at least a value for K;
detect the PDCCH in subsequent downlink transmissions from the eNB, starting at an initial OFDM symbol for the downlink subframe;
detect a downlink shared channel at a subsequent OFDM symbol of the downlink subframe, the subsequent OFDM symbol having been determined based on the configuration information; and
process the PDCCH and the downlink shared channel, wherein the PDCCH is time-division multiplexed (TDM) with the downlink shared channel, and
wherein the downlink shared channel is detected in a same downlink subframe as the PDCCH, and
wherein the PDCCH occupies fewer physical resource blocks (PRBs) than a system bandwidth and is locatable at predetermined off-center locations of the system bandwidth, the predetermined off-center locations being a same location in each downlink subframe and configured by the configuration information.
3. An apparatus for an evolved Node B (eNB), the apparatus comprising: processing circuitry; and memory,
wherein the processing circuitry is configured to:
encode for transmission to a user equipment (UE) configuration information indicating a number of first K orthogonal frequency division multiplexing (OFDM) symbols of a downlink subframe that are to include a physical downlink control channel (PDCCH), the PDCCH having a maximum duration of three OFDM symbols and is to start at a symbol of a slot of the downlink subframe based on a physical resource block (PRB) starting index;
encode for transmission to the UE information indicating at least a value for K;
encode the PDCCH for transmission in subsequent downlink transmissions to the UE, starting at an initial OFDM symbol for the downlink subframe; and
encode for transmission to the UE a downlink shared channel at a subsequent OFDM symbol of the downlink subframe, a location of the subsequent OFDM symbol based on the configuration information; and
wherein the PDCCH is time-division multiplexed (TDM) with the downlink shared channel,
wherein the downlink shared channel is encoded for transmission to the UE in a same downlink subframe as the PDCCH, and
wherein the PDCCH occupies fewer physical resource blocks (PRBs) than a system bandwidth and is locatable at predetermined off-center locations of the system bandwidth, the predetermined off-center locations being a same location in each downlink subframe and configured by the configuration information.