US 9,813,209 B2
Transmission of probing pilots in a shared radio cell
Sairamesh Nammi, Kista (SE); and Per Skillermark, Årsta (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 14/903,668
Filed by Telefonaktiebolaget L M Ericsson (publ), Stockholm (SE)
PCT Filed Nov. 15, 2013, PCT No. PCT/SE2013/051343
§ 371(c)(1), (2) Date Jan. 8, 2016,
PCT Pub. No. WO2015/012751, PCT Pub. Date Jan. 29, 2015.
Claims priority of provisional application 61/857,409, filed on Jul. 23, 2013.
Prior Publication US 2016/0173251 A1, Jun. 16, 2016
Int. Cl. H04L 5/00 (2006.01); H04W 48/12 (2009.01); H04W 8/22 (2009.01); H04W 72/08 (2009.01); H04W 88/02 (2009.01)
CPC H04L 5/0048 (2013.01) [H04W 8/22 (2013.01); H04W 48/12 (2013.01); H04W 72/085 (2013.01); H04W 88/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a radio network node, the radio network node operating in a shared radio cell deployment where several radio units are controlled by the radio network node and where each of the several radio units is serving a respective radio cell sector of a shared radio cell, the method comprising:
collecting information on User Equipment (UE) capabilities of UEs that are present in the shared radio cell;
based on the collected information, determining whether there exists at least one UE that is capable of utilizing probing pilots for checking which one of several radio cell sectors is a best available radio cell sector for the at least one UE;
transmitting the probing pilots to the at least one UE when it has been determined that the at least one UE that is capable of utilizing the probing pilots exists;
determining a traffic load of the shared radio cell;
comparing the determined traffic load of the shared radio cell with a second threshold value;
determining that the probing pilots are to be utilized and thus continuing to utilize the probing pilots in response to the determined traffic load of the shared radio cell being equal to or above the second threshold value; and
determining that the probing pilots are not to be utilized and thus disabling the utilization of the probing pilots in response to the determined traffic load of the shared radio cell being below the second threshold value.