Downlink control channel design for beamforming systems

1. A base station apparatus operable to communicate with a User Equipment (UE) on a wireless network, comprising:

one or more processors to:

establish a parameter set defining 5G Physical Downlink Control Channel (xPDCCH) transmission to the UE, wherein the parameter set includes:

first one or more parameters to identify a size of a Resource Block Group (RBG) within individual subframes, the RBG being associated with the xPDCCH transmission, wherein the size of the RBG is measured in terms of a first number of consecutive symbols and a second number of consecutive Physical Resource Blocks (PRBs); and

second one or more parameters that map the Resource Block Group (RBG) to a set of contiguous physical Resource Elements (REs) comprising Demodulation Reference Signals (DMRSes) and control channel data; and

generate, for transmission to the UE, one or more messages including the parameter set; and

an interface to output the one or more messages including the parameter set to a transceiver circuitry, for transmission to the UE.

2. The base station apparatus of claim 1 , wherein the one or more processors are to:

generate, for transmission to the UE, the xPDCCH in accordance with the parameter set.

3. The base station apparatus of claim 1 , wherein the one or more messages comprise a first message including a first parameter of the parameter set and a second message including a second parameter of the parameter set, and wherein to generate the one or more messages, the one or more processors are to:

generate the first message for transmission via broadcast signaling to a plurality of UEs, including the UE; and

generate the second message for transmission via unicast signaling specifically to the UE.

4. The base station apparatus of claim 1 , wherein the RBG is a first RBG, the size is a first size, and wherein the first and second one or more parameters are to identify:

the first size of the first RBG, a second size of a second RBG, and locations of the first RBG of the first size and the second RBG of the second size within a subframe,

wherein the first RBG and the second RBG are to be located in a single subframe, and

wherein the second size is different from the first size.

5. The base station apparatus of claim 1 , wherein to establish the parameter set, the one or more processors are to:

establish one or more parameters that identify a logical-to-physical mapping for a set of Resource Block Groups (RBGs) of one or more xPDCCH transmissions; and

include, within the parameter set, the one or more parameters for transmission to the UE.

6. The base station apparatus of claim 5 , wherein the logical-to-physical mapping for the set of Resource Block Groups (RBGs) is in accordance with at least one of: a time-first mapping, a frequency-first mapping, or a combination of time-first and frequency-first mapping.

7. The base station apparatus of claim 1 , wherein to establish the parameter set, the one or more processors are to:

establish one or more parameters that identify a mapping between 5G Control Channel Elements (xCCEs) and Resource Block Groups (RBGs) of one or more xPDCCH transmissions; and

include, within the parameter set, the one or more parameters.

8. The base station apparatus of claim 1 , wherein to establish the parameter set, the one or more processors are to:

establish one or more parameters that identify one or more types of search spaces for Resource Block Groups (RBGs) of one or more xPDCCH transmissions; and

include, within the parameter set, the one or more parameters.

9. The base station apparatus of claim 1 , wherein to establish the parameter set, the one or more processors are to:

establish one or more parameters that identify a mapping between Demodulation Reference Signals (DMRSes) of one or more xPDCCH transmissions and one or more antenna ports of the apparatus; and

include, within the parameter set, the one or more parameters.

10. The base station apparatus of claim 9 , wherein the one or more antenna ports comprise two antenna ports, and the one or more processors are to:

initiate one or more xPDCCH transmissions to the UE in accordance with a Space Frequency Block Code (SFBC) transmission scheme.

11. The base station apparatus of claim 9 , wherein the one or more antenna ports comprise a first antenna port, and the one or more processors are to:

initiate one or more xPDCCH transmissions to the UE in accordance with single layer beamforming.

12. The base station apparatus of claim 1 , wherein to establish the parameter set, the one or more processors are to:

establish one or more parameters that map a Resource Block Group (RBG) to a set of contiguous physical Resource Elements (REs) comprising Demodulation Reference Signals (DMRS) and control channel data; and

include, within the parameter set, the one or more parameters.

13. Machine readable storage media having machine executable instructions that, when executed, cause one or more processors of a base station to perform an operation comprising:

establishing a parameter set defining 5G Physical Downlink Control Channel (xPDCCH) transmission to a User Equipment (UE), wherein the parameter set includes:

first one or more parameters to identify a size of a Resource Block Group (RBG) within individual subframes, the RBG being associated with the xPDCCH transmission, wherein the size of the RBG is measured in terms of a first number of consecutive symbols and a second number of consecutive Physical Resource Blocks (PRBs); and

second one or more parameters that map the Resource Block Group (RBG) to a set of contiguous physical Resource Elements (REs) comprising Demodulation Reference Signals (DMRSes) and control channel data; and

generating, for transmission to the UE, one or more messages including the parameter set.

14. The machine readable storage media of claim 13 , wherein the one or more messages comprise a first message including a first parameter of the parameter set and a second message including a second parameter of the parameter set, and wherein to generate the one or more messages, the operation comprises:

generating the first message for transmission via broadcast signaling to a plurality of UEs, including the UE;

generating the second message for transmission via unicast signaling specifically to the UE; and

generating, for transmission to the UE, an xPDCCH in accordance with the parameter set.

15. A User Equipment (UE) operable to communicate with a base station on a wireless network, comprising:

one or more processors to:

process a parameter set received from a base station (BS), the parameter set defining 5G Physical Downlink Control Channel (xPDCCH) transmission from the base station, wherein the parameter set includes:

first one or more parameters to identify a size of a Resource Block Group (RBG) within individual subframes, the RBG being associated with the xPDCCH transmission, wherein the size of the RBG is measured in terms of a first number of consecutive symbols and a second number of consecutive Physical Resource Blocks (PRBs); and

second one or more parameters that map the Resource Block Group (RBG) to a set of contiguous physical Resource Elements (REs) comprising Demodulation Reference Signals (DMRSes) and control channel data; and

process one or more xPDCCH messages in accordance with the parameter set; and

a memory to store at least a part of the parameter set.

16. The UE of claim 15 , wherein the parameter set comprises at least a first parameter received via a first message and a second parameter received via a second message, and wherein to process the parameter set, the one or more processors are to:

process the first message that is received via broadcast signaling to a plurality of UEs, including the UE; and

process the second message that is received via unicast signaling specifically to the UE.

17. The UE of claim 15 , wherein to process the parameter set, the one or more processors are to:

process the first one or more parameters that identify the size of a Resource Block Group (RBG) within individual subframes, the RBG being associated with the xPDCCH transmission.