Signaling Methods for Communication Systems with Widely Spaced Downlink and Uplink Frequency Channels

Abstract

A method of wireless communication includes receiving a plurality of parameter values at a user equipment (UE) using a first local oscillator (LO) frequency value, where the plurality of parameter values includes indications of a downlink frequency channel and an uplink frequency channel. The method further includes determining a second LO frequency value at the UE, where the second LO frequency value is determined using the indications of downlink and uplink frequency channels. The method further includes receiving downlink signals from an associated base station using the second LO frequency value.

1 . A method of wireless communication, comprising:
 receiving a plurality of parameter values at a user equipment (UE), wherein the plurality of parameter values includes indications of an uplink frequency channel and a local oscillator (LO) frequency value;   determining a downlink frequency channel at the UE, wherein the downlink frequency channel is determined using the indications of the uplink frequency channel and the LO frequency value; and   receiving downlink signals on the downlink frequency channel from an associated base station.   
     
     
         2 . The method of  claim 1 , wherein at least one of the uplink and downlink frequency channels are unknown to the UE prior to receiving the indications. 
     
     
         3 . The method of  claim 1 , wherein the downlink frequency channel is in a millimeter wave band. 
     
     
         4 . The method of  claim 1 , wherein the uplink frequency channel is in a sub-7GHz band. 
     
     
         5 . A method of wireless communication, comprising:
 receiving a plurality of parameter values at a base station, wherein the plurality of parameter values includes channel properties and indications of an uplink frequency channel;   determining a downlink frequency channel using a predetermined channel mapping and the indications of an uplink frequency channel; and   transmitting at least the indication of the downlink frequency channel to an associated user equipment (UE).   
     
     
         6 . The method of  claim 5 , wherein the predetermined channel mapping maps the uplink channel to the downlink channel to optimize utilization of a spectrum. 
     
     
         7 . The method of  claim 5 , wherein the predetermined channel mapping maps the uplink frequency channel to the downlink frequency channel to reduce interference. 
     
     
         8 . The method of  claim 5 , wherein the channel properties include channel properties of neighboring base stations. 
     
     
         9 . The method of  claim 5 , wherein the downlink signal is in a millimeter wave band. 
     
     
         10 . The method of  claim 5 , wherein the uplink signal is in a sub-7GHz band. 
     
     
         11 . A method of wireless communication, comprising:
 receiving a plurality of parameter values at a user equipment (UE), wherein the plurality of parameter values includes indications of a downlink frequency channel and a local oscillator (LO) frequency value;   determining an uplink frequency channel at the UE, wherein the uplink frequency channel is determined using the indications of the downlink frequency channel and the LO frequency value;   receiving downlinks signals on the indicated downlink frequency channel; and   transmitting uplink signals on the uplink frequency channel to an associated base station.   
     
     
         12 . A method of wireless communication, comprising:
 receiving a plurality of parameter values at a user equipment (UE), wherein the plurality of parameter values includes indications of a downlink frequency channel and an uplink frequency channel;   estimating a carrier frequency offset at the UE;   determining a sampling frequency offset at the UE, wherein the sampling frequency offset is determined using the estimated carrier frequency offset and the indications of a downlink frequency channel;   receiving downlink signals on the indicated downlink frequency channel using the carrier frequency offset and the sampling frequency offset; and   transmitting uplink signals on the indicated uplink frequency channel.   
     
     
         13 . The method of  claim 12 , wherein the carrier frequency offset is estimated by self-correlation of digital sequences at the UE. 
     
     
         14 . The method of  claim 12 , further comprising using the estimated sampling frequency offset to reduce misalignment between a digital to analog converter and an analog to digital converter at the UE. 
     
     
         15 . A method of wireless communication, comprising:
 receiving a plurality of parameter values at a user equipment (UE), wherein the plurality of parameter values includes indications of a frequency channel and a relationship between a carrier frequency offset and a sampling frequency offset;   estimating the carrier frequency offset at the UE;   determining the sampling frequency offset at the UE, wherein the sampling frequency offset is determined using the estimated carrier frequency offset and the relationship between the carrier frequency offset and the sampling frequency offset; and   receiving downlink signals on the indicated frequency channel using the carrier frequency offset and the sampling frequency offset.   
     
     
         16 . The method of  claim 15 , further comprising using the sampling frequency offset to reduce misalignment between a digital to analog converter and an analog to digital converter at the UE.