Interference randomization of control channel elements
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsKarl Molnar, Jung-Fu Cheng, Stefan Parkvall
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Abstract
A method and a radio base station for interleaving control channel data to be transmitted in a telecommunications system are described. The method comprises grouping the control channel elements CCE1-CCEn into a first order of control channel symbol groups, determining a number of available symbol group positions of control channel transmission resources, adding symbol groups comprising “dummy” values or zeros to the first order of control channel symbol groups, interleaving the first order of the control channel symbol groups resulting in an a second order, cyclic shifting the second order and mapping the cyclic shifted second order of control channel symbol groups to the control channel transmission resources.
Claims32
A method for randomization of interference experienced by a shared control channel transmitted by using control channel transmission resources from a base station where said shared control channel comprises control channel elements CCE1-CCEn, said method comprising the steps of:
- grouping the control channel elements CCE1-CCEn into a first order of control channel symbol groups;
- determining a number of available symbol group positions of said control channel transmission resources;
- adding symbol groups comprising “dummy” values or zeros to the first order of control channel symbol groups so that said first order of symbol groups substantially equals said number of available symbol group positions;
- interleaving the first order of the control channel symbol groups resulting in a second order of said control channel symbol groups;
- cyclic shifting said second order;
- and
- mapping the cyclic shifted second order of control channel symbol groups to said control channel transmission symbol group positions.
A radio base station configured for randomization of interference experienced by a shared control channel transmitted by using control channel transmission resources from said base station, where said shared control channel comprises control channel elements CE1-CCEn, and where said base station comprises:
- a processing circuit configured for grouping the control channel elements CCE1-CCEn into a first order of control channel symbol groups;
- a processing circuit configured for determining a number of available symbol group positions of said control channel transmission resources;
- a processing circuit configured for adding symbol groups comprising “dummy” values or zeros to the first order of control channel symbol groups so that said first order of symbol groups substantially equals said number of available symbol group positions;
- a processing circuit configured for interleaving the first order of the control channel symbol groups resulting in an a second order for said control channel symbol groups;
- a processing circuit configured for cyclic shifting said second order;
- and
- a processing circuit configured for mapping the cyclic shifted second order of control channel symbol groups to said control channel transmission symbol group positions.
Dependencies are inferred from the claim text.