A method, performed by a wireless communication device , for managing a location request relating to estimation of a location of the wireless communication device by means of multi-lateration in a cellular network , comprising cells, wherein the method comprises: receiving (A030), from a location node , the location request, including information indicating a first set of cells usable by the wireless communication device when establishing timing advance values, characterised by : wherein the first set of cells comprises sub-sets of cells, wherein one sub-set comprises cells that are co-located with the serving cell and all other sub-sets comprise cells that are not co-located with the serving cell but are co-located with other cells in that set, and wherein the information comprises a device specific identification to be used in access requests sent by the wireless communication device to a network node, wherein the access request is used by the network node for timing advance estimation, and wherein each sub-set comprises an indication about whether or not the identification is allowed to be used for the cells of said each sub-set, determining (A040) a second set of cells based on the information, wherein determining a second set of cells based on the information comprises selecting cells that are not co-located, and establishing (A050) the timing advance values for the second set of cells. receiving (A030), from a location node , the location request, including information indicating a first set of cells usable by the wireless communication device when establishing timing advance values, characterised by : wherein the first set of cells comprises sub-sets of cells, wherein one sub-set comprises cells that are co-located with the serving cell and all other sub-sets comprise cells that are not co-located with the serving cell but are co-located with other cells in that set, and wherein the information comprises a device specific identification to be used in access requests sent by the wireless communication device to a network node, wherein the access request is used by the network node for timing advance estimation, and wherein each sub-set comprises an indication about whether or not the identification is allowed to be used for the cells of said each sub-set, wherein the first set of cells comprises sub-sets of cells, wherein one sub-set comprises cells that are co-located with the serving cell and all other sub-sets comprise cells that are not co-located with the serving cell but are co-located with other cells in that set, and wherein the information comprises a device specific identification to be used in access requests sent by the wireless communication device to a network node, wherein the access request is used by the network node for timing advance estimation, and wherein each sub-set comprises an indication about whether or not the identification is allowed to be used for the cells of said each sub-set, determining (A040) a second set of cells based on the information, wherein determining a second set of cells based on the information comprises selecting cells that are not co-located, and establishing (A050) the timing advance values for the second set of cells. <EOS>