Method and apparatus used to manage links

Abstract

Provided in embodiments of the present application are a method and a device for managing a link. The method includes: receiving, by a first network device, a first link quality parameter sent by a second network device, wherein the first link quality parameter is used to indicate a link quality between a terminal device and the second network device, and the first network device provides a current service for the terminal device; and determining, by the first network device, whether a connection between the terminal device and the second network device is needed according to the first link quality parameter.

What is claimed is: 
     
         1 . A method for managing a link, comprising:
 receiving, by a first network device, a first link quality parameter sent by a second network device, wherein the first link quality parameter is used to indicate a link quality between a terminal device and the second network device, and the first network device provides a current service for the terminal device; and   determining, by the first network device, whether a connection between the terminal device and the second network device is needed according to the first link quality parameter.   
     
     
         2 . The method according to  claim 1 , wherein before determining, by the first network device, whether the connection between the terminal device and the second network device is needed according to the first link quality parameter, the method further comprises:
 obtaining, by the first network device, a second link quality parameter, wherein the second link quality parameter is used to indicate a link quality between the terminal device and the first network device;   determining, by the first network device, whether a connection between the terminal device and the second network device is needed according to the first link quality parameter, comprises:   determining, by the first network device, whether the connection between the terminal device and the second network device is needed according to the first link quality parameter and the second link quality parameter.   
     
     
         3 . The method according to  claim 2 , wherein determining, by the first network device, whether the connection between the terminal device and the second network device is needed according to the first link quality parameter and the second link quality parameter, comprises:
 if the first link quality parameter is greater than a first threshold value, and the second link quality parameter is smaller than a second threshold value, determining, by the first network device, that the connection between the terminal device and the second network device is needed; or   wherein determining, by the first network device, whether the connection between the terminal device and the second network device is needed according to the first link quality parameter and the second link quality parameter, comprises:   if the first link quality parameter is greater than a sum of the second link quality parameter and a third threshold value, determining, by the first network device, that the connection between the terminal device and the second network device is needed; or   wherein determining, by the first network device, whether the connection between the terminal device and the second network device is needed according to the first link quality parameter and the second link quality parameter, comprises:   if the first link quality parameter is smaller than a fourth threshold value, and the second link quality parameter is greater than a fifth threshold value, determining, by the first network device, that the connection between the terminal device and the second network device is not needed.   
     
     
         4 . The method according to  claim 1 , wherein after determining whether the connection between the terminal device and the second network device is needed, the method further comprises:
 if it is determined that the connection between the terminal device and the second network device is needed, and there is no connection between the terminal device and the second network device, establishing, by the first network device, the connection between the terminal device and the second network device.   
     
     
         5 . The method according to  claim 4 , wherein establishing, by the first network device, the connection between the terminal device and the second network device, comprises:
 adding, by the first network device, the connection between the terminal device and the second network device as an auxiliary connection of a link of the terminal device according to the first link quality parameter.   
     
     
         6 . The method according to  claim 4 , wherein establishing, by the first network device, the connection between the terminal device and the second network device, comprises:
 switching, by the first network device, a link of the terminal device to the second network device according to the first link quality parameter.   
     
     
         7 . The method according to  claim 1 , wherein after determining whether the connection between the terminal device and the second network device is needed, the method further comprises:
 if it is determined that the connection between the terminal device and the second network device is not needed, and there exists a connection between the terminal device and the second network device, deleting, by the first network device, the connection between the terminal device and the second network device.   
     
     
         8 . The method according to  claim 1 , wherein the first link quality parameter is at least one of the following parameters between the terminal device and the second network device:
 a signal reception strength, a signal reception quality or a link loss.   
     
     
         9 . The method according to  claim 1 , wherein before receiving, by the first network device, the first link quality parameter sent by the second network device, the method further comprises:
 sending, by the first network device, measurement configuration information to the second network device, wherein the measurement configuration information is used to instruct the second network device to measure the link quality between the terminal device and the second network device;   wherein receiving, by the first network device, the first link quality parameter sent by the second network device, comprises:   receiving, by the first network device, a measurement result that is sent by the second network device according to the measurement configuration information, wherein the measurement result carries at least one of:   at least one first link quality parameter of a measured beam, a cell, a network transmission point, and frequency point information, and uplink transmission time reference information of the terminal device.   
     
     
         10 . The method according to  claim 9 , wherein the measurement configuration information comprises at least one of:
 the measured beam, the network transmission point, the cell, the frequency point information, measurement quantity information, a measurement result reporting condition, a measurement time trigger quantity, a measurement result reporting quantity, a measurement result reporting time interval, and request indication information for instructing the terminal device to send the transmission time reference information, wherein the transmission time reference information is used to indicate time for the terminal device to send data.   
     
     
         11 . The method according to  claim 1 , wherein before receiving, by the first network device, the first link quality parameter sent by the second network device, the method further comprises:
 sending, by the first network device, a request message to the second network device, wherein the request message is used to request the second network device to configure a reference signal for the terminal device;   receiving, by the first network device, a configuration parameter of the reference signal sent by the second network device; and   sending, by the first network device, the configuration parameter to the terminal device; or   wherein before receiving, by the first network device, the first link quality parameter sent by the second network device, the method further includes:   sending, by the first network device, a configuration parameter of a reference signal of the terminal device to the second network device.   
     
     
         12 . The method according to  claim 11 , wherein the configuration parameter comprises at least one of:
 a resource location occupied by transmitted reference signal, a signal codeword, beam information, a network transmission point, and a transmission power for transmitting the reference signal.   
     
     
         13 . A method for managing a link, comprising:
 determining, by a second network device, a first link quality parameter, wherein the first link quality parameter is used to indicate a link quality between a terminal device and the second network device; and   sending, by the second network device, the first link quality parameter to a first network device, wherein the first network device provides a current service for the terminal device.   
     
     
         14 . The method according to  claim 13 , wherein sending, by the second network device, the first link quality parameter to the first network device, comprises:
 periodically sending, by the second network device, the first link quality parameter to the first network device.   
     
     
         15 . The method according to  claim 13 , wherein before sending, by the second network device, the first link quality parameter to the first network device, the method further comprises:
 determining, by the second network device, whether there is a connection between the terminal device and the second network device;   wherein sending, by the second network device, the first link quality parameter to the first network device, comprises:   if there is no connection between the terminal device and the second network device and the first link quality parameter is greater than a sixth threshold value, sending, by the second network device, the first link quality parameter to the first network device.   
     
     
         16 . The method according to  claim 15 , wherein sending, by the second network device, the first link quality parameter to the first network device, comprises:
 if the first link quality parameter continues to be greater than the sixth threshold value in a first time period, sending, by the second network device, the first link quality parameter to the first network device.   
     
     
         17 . The method according to  claim 15 , wherein the method further comprises:
 if there is a connection between the terminal device and the second network device, and the first link quality parameter is smaller than a seventh threshold value, sending, by the second network device, the first link quality parameter to the first network device.   
     
     
         18 . The method according to  claim 17 , wherein sending, by the second network device, the first link quality parameter to the first network device, comprises:
 if the first link quality parameter continues to be smaller than the seventh threshold value in a second time period, sending, by the second network device, the first link quality parameter to the first network device.   
     
     
         19 . The method according to  claim 13 , wherein before sending, by the second network device, the first link quality parameter to the first network device, the method further comprises:
 receiving, by the second network device, measurement configuration information sent by the first network device, wherein the measurement configuration information is used to instruct the second network device to measure the link quality between the terminal device and the second network device;   sending, by the second network device, the first link quality parameter to the first network device, comprises:   sending, by the second network device, a measurement result to the first network device according to the measurement configuration information, wherein the measurement result carries at least one of:   at least one first link quality parameter of a measured beam, a cell, a network transmission point, and frequency point information, and uplink transmission time reference information of the terminal device.   
     
     
         20 . A device for managing a link, comprising:
 a processor;   a memory storing instructions executable by the processor;   wherein the processor is configured to:   receive a first link quality parameter sent by a second network device, wherein the first link quality parameter is used to indicate a link quality between a terminal device and the second network device, and the device provides a current service for the terminal device; and   determine whether a connection between the terminal device and the second network device is needed according to the first link quality parameter.