Optimized time synchronization for a ue

Abstract

According to certain embodiments, a method in a network node for delivering a time synchronization service comprises obtaining a timing accuracy threshold for a time synchronization service provided to a wireless device; determining, based on a first timing accuracy error at the network node and a second timing accuracy error between the network node and the wireless device, that a timing accuracy of the time synchronization service is equal or superior to the timing accuracy threshold, and transmitting the time synchronization service to the wireless device with a timing accuracy equal or superior to the timing accuracy threshold. The method further comprises, in response to determining that the timing accuracy of the time synchronization service is inferior to the timing accuracy threshold, reconfiguring the network node to improve the timing accuracy of the time synchronization service.

1 - 17 . (canceled) 
     
     
         18 . A network node operable to deliver a time synchronization service, the network node comprising processing circuitry operable to:
 obtain a timing accuracy threshold for a time synchronization service provided to a wireless device;   determine, based on the first timing accuracy error at the network node and the second timing accuracy error between the network node and the wireless device, that the timing accuracy of the time synchronization service is inferior to the timing accuracy threshold; and   in response to determining that the timing accuracy of the time synchronization service is inferior to the timing accuracy threshold, reconfigure the network node to improve the timing accuracy of the time synchronization service.   
     
     
         19 . The network node of  claim 18 , the processing circuitry further operable to:
 determine, based on a first timing accuracy error at the network node and a second timing accuracy error between the network node and the wireless device, that a timing accuracy of the time synchronization service is equal or superior to the timing accuracy threshold; and   in response to determining that the timing accuracy of the time synchronization service is equal or superior to the timing accuracy threshold, transmit the time synchronization service to the wireless device with a timing accuracy equal or superior to the timing accuracy threshold.   
     
     
         20 . The network node of  claim 18 , wherein the processing circuitry is operable to reconfigure the network node by configuring the network node to use beamforming towards the wireless device. 
     
     
         21 . The network node of  claim 18 , wherein the processing circuitry is operable to reconfigure the network node by configuring the network node to increase the power for transmission to the wireless device. 
     
     
         22 . The network node of  claim 18 , wherein the processing circuitry is operable to reconfigure the network node by configuring the network node to increase the bandwidth for transmission to the wireless device. 
     
     
         23 . The network node of  claim 18 , wherein the processing circuitry is operable to reconfigure the network node by configuring the network node to send a timing advance (TA) value to the wireless device that is more accurate than a TA value previously used with the wireless device. 
     
     
         24 . The network node of  claim 18 , wherein the processing circuitry is operable to reconfigure the network node by configuring the network node to estimate a round trip time (RTT) of a transmission with the wireless device based on a reference signal transmitted from the network node to the wireless device and from the wireless device to the network node. 
     
     
         25 . The network node of  claim 18 , wherein the processing circuitry is operable to reconfigure the network node by configuring the network node to increase the periodicity of reference signals transmitted to the wireless device. 
     
     
         26 . The network node of  claim 18 , wherein reconfiguring the network node comprises configuring the network node to reduce interference from communication with other wireless devices. 
     
     
         27 . The network node of  claim 19 , the processing circuitry further operable to:
 in response to determining that the timing accuracy of the time synchronization service is equal or superior to the timing accuracy threshold, reconfigure the network node to conserve network resources while providing the time synchronization service to the wireless device with the timing accuracy equal or superior to the timing accuracy threshold.   
     
     
         28 . (canceled) 
     
     
         29 . The network node of  claim 18 , the processing circuitry further operable to receive a timing accuracy error of the wireless device in receiving the time synchronization service, and wherein the processing circuitry is operable to determine that the timing accuracy of the time synchronization service is equal or superior to the timing accuracy threshold further based on the timing accuracy error of the wireless device. 
     
     
         30 . The network node of  claim 18 , wherein the timing accuracy threshold includes timing traceability information and timing precision information for the time synchronization service. 
     
     
         31 . The network node of  claim 18 , wherein the processing circuitry is operable to obtain the timing accuracy threshold by obtaining subscription information associated with the wireless device. 
     
     
         32 . The network node of  claim 18 , wherein the processing circuitry is operable to obtain the timing accuracy threshold by receiving signaling from the wireless device. 
     
     
         33 . (canceled) 
     
     
         34 . (canceled) 
     
     
         35 . A method for use in a wireless device for receiving a time synchronization service, the method comprising:
 obtaining a timing accuracy threshold for a time synchronization service;   transmitting the timing accuracy threshold to a network node; and   receiving a time synchronization service with a timing accuracy equal or superior to the timing accuracy threshold.   
     
     
         36 .- 39 . (canceled) 
     
     
         40 . A wireless device operable to receive a time synchronization service, the wireless device comprising processing circuitry operable to:
 obtain a timing accuracy threshold for a time synchronization service;   transmit the timing accuracy threshold to a network node; and   receive a time synchronization service with a timing accuracy equal or superior to the timing accuracy threshold.   
     
     
         41 . The wireless device of  claim 40 , the processing circuitry further operable to:
 determine a timing accuracy error of the wireless device in receiving the time synchronization service; and   transmit the determined timing accuracy error of the wireless device to the network node.   
     
     
         42 . The wireless device of  claim 40 , the processing circuitry further operable to receive an indication from the network node that the network node can no longer provide the time synchronization service with a timing accuracy equal or superior to the timing accuracy threshold. 
     
     
         43 . The wireless device of  claim 42 , the processing circuitry further operable to perform a handover to a different network node. 
     
     
         44 . The wireless device of  claim 40 , wherein the timing accuracy threshold includes timing traceability information and timing precision information for the time synchronization service. 
     
     
         45 .- 46 . (canceled)