Patent ID: 9118369
Filing Date: 2015-08-25
Classification: H04B,H04L,H04W

Abstract:
1. A method implemented by a wireless device for initializing a pseudo-random sequence generator on which to base generation of an uplink reference signal, comprising: selectively deriving one of the initialization sequences within a subset of possible initialization sequences for the sequence generator, according to one or more rules that define different initialization sequences in the subset as a function of a single parameter, wherein the single parameter is received from a base station and the derived initialization sequence is a device-specific sequence, wherein said deriving comprises deriving the initialization sequence based on a defined one-to-one mapping of the possible initialization sequences in the subset to possible values for the single parameter, wherein the range of the single parameter is smaller than the range of the subset, wherein said deriving comprises deriving the initialization sequence c wherein z is the single parameter and └x┘ denotes a floor function that rounds x to the nearest integer less than or equal to x; generating the uplink reference signal with the sequence generator initialized to the derived initialization sequence, by determining a cyclic shift hopping pattern from the derived initialization sequence and applying the cyclic shift hopping pattern to a cyclic shift; and transmitting the generated uplink reference signal.