Patent ID: 8717993
Filing Date: 2014-05-06
Classification: H04W

Abstract:
1. A method for defining transmission parameters of user equipment (UE) reference signals (RS), comprising: estimating channel delay spreads of a plurality of UEs scheduled for transmission at a particular transmission time period or sub-frame in an uplink for communication with a NodeB; allocating transmission parameters to each scheduled UE of the plurality of UEs in accordance to the delay spreads of the plurality of UEs scheduled for transmission in the particular time period or sub-frame, wherein the parameters comprises a cyclic shift allocated to each m-th UE equal to the sum of a delay spread and a timing uncertainty of each of the previous m-1 UEs, wherein m is equal or greater than 1; and utilizing at the UE the updated allocated cyclic shift to form a later transmitted RS by applying the updated cyclic shift to the CAZAC sequence.