Method, device, and system for inter-frequency cell measurement

Abstract

An inter-frequency cell measurement operation in described. The operation includes: performing, by a terminal, when receiving a measurement command of a network side device, inter-frequency cell measurement, in different cases, based on the time specified in different measurement time parameters or based on measurement time parameters corresponding to the information about an inter-frequency band. As different measurement time parameters specify different time actually used for measurement. Not only can an inter-frequency cell that meets a measurement event be measured, but also the time for measurement by the terminal can be reduced, thereby reducing the power consumption of the terminal and enhancing the performance of the terminal.

What is claimed is: 
     
         1 . A method for inter-frequency cell measurement, comprising:
 receiving, by a terminal, a measurement command carrying information about an inter-frequency band sent by a network side device;   detecting whether a candidate cell is present within a certain range of a current position;   if no, performing, based on preset second measurement time parameters, inter-frequency cell measurement, wherein the second measurement time parameters comprise a second gap duration, a second gap repetition cycle, and a second minimum available measurement time.   
     
     
         2 . The method according to  claim 1 , wherein the detecting whether a candidate cell is present within a certain range of a current position comprises:
 adjusting a receiving frequency into the inter-frequency band;   measuring the signal quality or strength of a common channel of the inter-frequency band; and   determining, according to whether the signal quality or strength of the common channel of the inter-frequency band is higher than a first preset value, whether a candidate cell is present within a certain range of the current position, wherein the first preset value is carried in the measurement command or prestored in the terminal.   
     
     
         3 . The method according to  claim 2 , wherein the common channel is a primary synchronization channel and/or a secondary synchronization channel. 
     
     
         4 . The method according to  claim 1 , wherein the detecting whether an inter-frequency cell is present within a certain range of a current position is specifically:
 detecting whether a candidate cell is present at a certain distance away from the current position through a satellite positioning system.   
     
     
         5 . The method according to  claim 1 , wherein the method further comprises:
 if yes, performing, based on preset first measurement time parameters, inter-frequency cell measurement;   wherein the first measurement time parameters comprise a first gap duration, a first gap repetition cycle, and a first minimum available measurement time, the first gap duration is longer than the second gap duration, and/or the first gap repetition cycle is shorter than the second gap repetition cycle, and/or the first minimum available measurement time is longer than the second minimum available measurement time.   
     
     
         6 . The method according to  claim 5 , wherein the performing, based on preset first measurement time parameters, inter-frequency cell measurement comprises:
 performing a search after the receiving frequency is adjusted into the inter-frequency band, and determining an inter-frequency cell located at the inter-frequency band; and   performing, based on time specifications of the preset first measurement time parameters, inter-frequency cell signal measurement.   
     
     
         7 . The method according to  claim 1 , wherein the performing, based on preset second measurement time parameters, inter-frequency cell measurement comprises:
 performing a search after the receiving frequency is adjusted into the inter-frequency band, and determining an inter-frequency cell located at the inter-frequency band; and   performing, based on time specifications of the preset second measurement time parameters, inter-frequency cell signal measurement.   
     
     
         8 . The method according to  claim 1 , wherein the second measurement time parameters are specifically carried in the measurement command, and the method further comprises:
 feeding back, to the network side device, identifiers of measurement time parameters to be adopted and/or an application moment of the measurement time parameters.   
     
     
         9 . The method according to  claim 1 , wherein the second measurement time parameters are prestored in the terminal, and the method further comprises:
 determining whether a measurement identifier is carried in the measurement command, and if yes, performing the step of detecting whether a candidate cell is present within a certain range of a current position.   
     
     
         10 . A device for inter-frequency cell measurement, comprising:
 a receiver, configured to receive a measurement command carrying information about an inter-frequency band sent by a network side device;   a processor, configured to detect whether a candidate cell is present within a certain range of a current position; perform, when the detection result of the detection module is no, based on preset second measurement time parameters, inter-frequency cell measurement, wherein the second measurement time parameters comprise a second gap duration, a second gap repetition cycle, and a second minimum available measurement time.   
     
     
         11 . The device according to  claim 10 , wherein the processor is configured to:
 adjust a receiving frequency into the inter-frequency band;   measure the signal quality or strength of a common channel of the inter-frequency band; and   determine whether the signal quality or strength of the common channel of the inter-frequency band is higher than a first preset value, wherein the first preset value is carried in the measurement command or prestored.   
     
     
         12 . The device according to  claim 11 , wherein the common channel is a primary synchronization channel and/or a secondary synchronization channel. 
     
     
         13 . The device according to  claim 10 , wherein the processor is specifically configured to detect whether a candidate cell is present at a certain distance away from the current position through a satellite positioning system. 
     
     
         14 . The device according to  claim 10 , wherein the processor is further configured to:
 if yes, perform, based on preset first measurement time parameters, inter-frequency cell measurement;   wherein the first measurement time parameters comprise a first gap duration, a first gap repetition cycle, and a first minimum available measurement time, the first gap duration is longer than the second gap duration, and/or the first gap repetition cycle is shorter than the second gap repetition cycle, and/or the first minimum available measurement time is longer than the second minimum available measurement time.   
     
     
         15 . The device according to  claim 14 , wherein the processor is configured to:
 perform a search after the receiving frequency is adjusted into the inter-frequency band, and determining an inter-frequency cell located at the inter-frequency band; and   perform, based on time specifications of the preset first measurement time parameters, inter-frequency cell signal measurement.   
     
     
         16 . The device according to  claim 10 , wherein the processor is configured to:
 perform a search after the receiving frequency is adjusted into the inter-frequency band, and determining an inter-frequency cell located at the inter-frequency band; and   perform, based on time specifications of the preset second measurement time parameters, inter-frequency cell signal measurement.   
     
     
         17 . The device according to  claim 10 , wherein the second measurement time parameters are specifically carried in the measurement command, and the device further comprises:
 a transmitter, configured to feed back to the network side device identifiers of measurement time parameters to be adopted, and/or an application moment of the measurement time parameters.   
     
     
         18 . The device according to  claim 10 , wherein the second measurement time parameters are prestored, and the processor is further configured to:
 determine whether a measurement identifier is carried in the measurement command.   
     
     
         19 . A system for inter-frequency cell measurement, comprising:
 a network side device, configured to send to a terminal a measurement command carrying information about an inter-frequency band; and   a terminal, configured to detect, after receiving the measurement command, whether a candidate cell is present within a certain range of a current position; if no, perform, based on preset second measurement time parameters, inter-frequency cell measurement, wherein the second measurement time parameters comprise a second gap duration, a second gap repetition cycle, and a second minimum available measurement time.   
     
     
         20 . The system according to  claim 19 , wherein the terminal is further configured to: if yes, perform, based on preset first measurement time parameters, inter-frequency cell measurement;
 wherein the first measurement time parameters comprise a first gap duration, a first gap repetition cycle, and a first minimum available measurement time, the first gap duration is longer than the second gap duration, and/or the first gap repetition cycle is shorter than the second gap repetition cycle, and/or the first minimum available measurement time is longer than the second minimum available measurement time.