Control channel configuration in partial and full subframes

1. A method comprising:

receiving, by a wireless device, at least one radio resource control (RRC) message comprising a field indicating a starting symbol for an enhanced physical downlink control channel (ePDCCH); and

receiving, via an ePDCCH, a signal, wherein:

the ePDCCH starts from the starting symbol for a full subframe; and

based on the RRC message, the ePDCCH starts from the starting symbol plus a non-zero offset symbol value for a partial subframe.

2. The method of claim 1 , wherein:

the at least one RRC message further comprises configuration parameters comprising one or more parameters indicating resource blocks (RBs) for the ePDCCH;

the one or more parameters indicate one or two sets of RB pairs; and

the field indicating the starting symbol applies to the one or two sets of RB pairs.

3. The method of claim 1 , wherein the at least one RRC message comprises a parameter indicating one or more possible starting positions of transmission in a subframe, and further comprising determining, based on the parameter, the non-zero offset symbol value.

4. The method of claim 1 , further comprising:

receiving a physical downlink shared channel (PDSCH);

determining, based on the starting symbol, a PDSCH starting symbol, wherein:

the PDSCH starts from the starting symbol for a full subframe; and

the PDSCH starts from the starting symbol plus the non-zero offset symbol value for a partial subframe.

5. The method of claim 1 , further comprising determining, based on a reference signal, whether a subframe is a full subframe or a partial subframe.

6. The method of claim 1 , wherein the at least one RRC message further comprises a parameter indicating an ePDCCH subframe pattern comprising one or more subframes.

7. A wireless device comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the wireless device to:

receive at least one radio resource control (RRC) message comprising a field indicating a starting symbol for an enhanced physical downlink control channel (ePDCCH); and

receive, via the ePDCCH, a signal, wherein:

the ePDCCH starts from the starting symbol for a full subframe; and

based on the RRC message, the ePDCCH starts from the starting symbol plus a non-zero offset symbol value for a partial subframe.

8. The wireless device of claim 7 , wherein:

the at least one RRC message further comprises configuration parameters comprising one or more parameters indicating resource blocks (RBs) for the ePDCCH;

the one or more parameters indicate one or two sets of RB pairs; and

the field indicating the starting symbol applies to the one or two sets of RB pairs.

9. The wireless device of claim 7 , wherein:

the at least one RRC message comprises a parameter indicating one or more possible starting positions of transmission in a subframe; and

the instructions, when executed by the one or more processors, further cause the wireless device to determine the non-zero offset symbol value based on the parameter.

10. The wireless device of claim 7 , wherein the instructions, when executed, further cause the wireless device to:

receive a physical downlink shared channel (PDSCH); and

determine a PDSCH starting symbol based on the starting symbol, wherein:

the PDSCH starts from the starting symbol for a full subframe; and

the PDSCH starts from the starting symbol plus the non-zero offset symbol value for a partial subframe.

11. The wireless device of claim 7 , wherein the instructions, when executed, further cause the wireless device to detect, based on a reference signal, whether a subframe is a full subframe or a partial subframe.

12. The wireless device of claim 7 , wherein the at least one RRC message further comprises a parameter indicating an ePDCCH subframe pattern comprising one or more subframes.

13. A method comprising:

transmitting, by a base station, at least one radio resource control (RRC) message comprising a field indicating a starting symbol for an enhanced physical downlink control channel (ePDCCH); and

transmitting, by the base stationer and via the ePDCCH a signal, wherein:

the ePDCCH starts from the starting symbol for a full subframe; and

based on the RRC message, the ePDCCH starts from the starting symbol plus a non-zero offset symbol value for a partial subframe.

14. The method of claim 13 , wherein:

the at least one RRC message further comprises configuration parameters comprising one or more parameters indicating resource blocks (RBs) for the ePDCCH;

the one or more parameters indicate one or two sets of RB pairs; and

the field indicating the starting symbol applies to the one or two sets of RB pairs.

15. The method of claim 13 , wherein the at least one RRC message comprises a parameter indicating one or more possible starting positions of transmission in a subframe and for determining the non-zero offset symbol value.

16. The method of claim 13 , further comprising transmitting, by the base station, a physical downlink shared channel (PDSCH), wherein:

the starting symbol is for determining a PDSCH starting symbol;

the PDSCH starts from the starting symbol for a full subframe; and

the PDSCH starts from the starting symbol plus the non-zero offset symbol value for a partial subframe.

17. The method of claim 13 , wherein the at least one RRC message further comprises a parameter indicating an ePDCCH subframe pattern comprising one or more subframes.

18. A base station comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the base station to:

transmit at least one radio resource control (RRC) message comprising a field indicating a starting symbol for an enhanced physical downlink control channel (ePDCCH); and

transmit, via the ePDCCH, a signal, wherein:

the ePDCCH starts from the starting symbol for a full subframe; and

based on the RRC message, the ePDCCH starts from the starting symbol plus a non-zero offset symbol value for a partial subframe.

19. The base station of claim 18 , wherein:

the at least one RRC message further comprises configuration parameters comprising one or more parameters indicating resource blocks (RBs) for the ePDCCH;

the one or more parameters indicate one or two sets of RB pairs; and

the field indicating the starting symbol applies to the one or two sets of RB pairs.

20. The base station of claim 18 , wherein the at least one RRC message comprises a parameter indicating one or more possible starting positions of transmission in a subframe and for determining the non-zero offset symbol value.

21. The base station of claim 18 , wherein the instructions, when executed, further cause the base station to transmit a physical downlink shared channel (PDSCH), wherein:

the starting symbol is usable to determine a PDSCH starting symbol;

the PDSCH starts from the starting symbol for a full subframe; and

the PDSCH starts from the starting symbol plus the non-zero offset symbol value for a partial subframe.

22. The base station of claim 18 , wherein the at least one RRC message further comprises a parameter indicating an ePDCCH subframe pattern comprising one or more subframes.

23. A system comprising:

a base station; and

a wireless device,

wherein the base station is configured to:

transmit at least one radio resource control (RRC) message comprising a field indicating a starting symbol for an enhanced physical downlink control channel (ePDCCH); and

wherein the wireless device is configured to:

receive the at least one RRC message; and

receive, based on the field indicating the starting symbol and via the ePDCCH a signal, wherein:

the ePDCCH starts from the starting symbol for a full subframe; and

based on the RRC message, the ePDCCH starts from the starting symbol plus a non-zero offset symbol value for a partial subframe.

24. The system of claim 23 , wherein:

the at least one RRC message further comprises configuration parameters comprising one or more parameters indicating resource blocks (RBs) for the ePDCCH;

the one or more parameters indicate one or two sets of RB pairs; and

the field indicating the starting symbol applies to the one or two sets of RB pairs.

25. The system of claim 23 , wherein:

the at least one RRC message comprises a parameter indicating one or more possible starting positions of transmission in a subframe; and

the wireless device is further configured to determine the non-zero offset symbol value based on the parameter.

26. The system of claim 23 , wherein:

the base station is further configured to transmit a physical downlink shared channel (PDSCH);

the wireless device is further configured to determine a PDSCH starting symbol based on the starting symbol;

the PDSCH starts from the starting symbol for a full subframe; and

the PDSCH starts from the starting symbol plus the non-zero offset symbol value for a partial subframe.

27. The system of claim 23 , wherein the wireless device is further configured to detect, based on a reference signal, whether a subframe is a full subframe or a partial subframe.

28. The system of claim 23 , wherein the at least one RRC message further comprises a parameter indicating an ePDCCH subframe pattern comprising one or more subframes.