Blockage detection in millimeter wave radio communications

Abstract

Blockage detection in a wireless transmit receive unit includes performing a radio link measurement on one or more reference signals. The radio link measurement is compared to a comparing threshold and a blockage condition is indicated in response to the comparing of the radio link measurement meeting a threshold criterion on the comparing threshold.

1 . A method of blockage detection in a wireless transmit receive unit (WTRU), the method comprising:
 performing buffer status monitoring on one or more receiving data buffer and transmission data buffer;   comparing a buffer status measurement to a comparing threshold; and   determining whether the buffer status measurement indicates a blockage condition.   
     
     
         2 . The method of  claim 1 , wherein the comparing threshold is determined by a latest buffer status measurement and a historical buffer status measurement. 
     
     
         3 . The method of  claim 1 , wherein the buffer status measurement is to measure the statistical data of buffer occupancy, round trip time, retransmission time, failure delivery rate, etc. 
     
     
         4 . The method of  claim 1  wherein the blockage condition is met when either the buffer status measurement is above the comparing threshold or the buffer status measurement is above the comparing threshold for a time period. 
     
     
         5 . The method of  claim 4  further comprising:
 starting a timer when a first blockage condition is satisfied; and 
 determining the blockage if the blockage condition is still satisfied after timer expiry.