Apparatus and method for allocating resources for switching between macro cell and small cell in wireless communication system

Abstract

The objective of the present invention is to provide services by effectively switching, by a terminal, a macro cell and a small cell on the basis of time in a communication system in which the macro cell and the small cell coexist. A method for operating a terminal in a wireless communication system comprises the steps of: transmitting, to a first base station and/or a second base station, information on a switching delay time required for the terminal to perform cell switching; and communicating through a resource of the first base station and a resource of the second base station which are allocated by considering the switching delay time.

What is claimed is: 
     
         1 . A method performed by a terminal in a wireless communication system, the method comprising:
 establishing dual connectivity for a first cell and a second cell;   transmitting, capability information of the terminal, wherein the capability information includes information on a switching delay time required for uplink switching between the first cell and the second cell;   receiving information on an uplink resource allocation shared by the first cell and the second cell; and   performing an uplink communication with the at least one of the first cell or the second cell based on the information on the uplink resource allocation,   wherein the uplink resource allocation is based on the information on the switching delay time, resources of the first cell and resources of the second cell, and   wherein the resources of the first cell and the resources of the second cell are multiplexed in time axis.   
     
     
         2 . The method of  claim 1 ,
 wherein the first cell is provided by a first base station (BS) supporting a first radio access technology (RAT), and the second cell is provided by a second BS supporting a second RAT that is different from the first RAT.   
     
     
         3 . The method of  claim 1 , further comprising:
 if a conflict between the resources of the first cell and the resources of the second cell occurs, reporting an occurrence of the conflict,   wherein the uplink resource allocation information comprises monitoring information indicating whether the uplink switching is needed for a resource allocation.   
     
     
         4 . The method of  claim 2 , wherein the performing the uplink communication comprises:
 transmitting, to the first BS, a first uplink signal including a cyclic prefix (CP);   performing the uplink switching from the first cell to the second cell;   transmitting, to the second BS, a second uplink signal including the CP; and   if a timing advance (TA) for the first cell or a TA for the second cell is changed, transmitting the changed TA.   
     
     
         5 . The method of  claim 1 , wherein the performing the uplink communication comprises:
 performing the uplink communication with the at least one of the first cell or the second cell by using a signal including a cyclic prefix (CP), and   wherein the length of the CP is determined based on the capability information of the terminal and is longer than a length of an uplink switching time.   
     
     
         6 . A method performed by a base station (BS) in a wireless communication system, the method comprising:
 establishing dual connectivity with a terminal;   receiving, from the terminal, capability information of the terminal, wherein the capability information includes information on a switching delay time required for uplink switching between a first cell of the BS and a second cell;   identifying an uplink resource allocation shared by the first cell and the second cell based on the switching delay time, resources of the first cell and resources of the second cell;   transmitting, to the terminal, information on the uplink resource allocation shared by the first cell and the second cell; and   performing an uplink communication with the terminal based on the information on the uplink resource allocation,   wherein the resources of the first cell and the resources of the second cell are multiplexed in time axis.   
     
     
         7 . The method of  claim 6 ,
 wherein the first cell is provided by the BS supporting a first radio access technology (RAT), and the second cell is provided by another BS supporting a second RAT that is different from the first RAT.   
     
     
         8 . The method of  claim 6 , further comprising:
 receiving, from the terminal, information on a timing advance (TA) of the terminal;   determining an uplink switching time of the terminal based on at least one of the switching delay time or the TA of the terminal; and   determining a resource to make empty such that a length of the empty resource is equal to or greater than the uplink switching time between the first cell and the second cell.   
     
     
         9 . The method of  claim 6 , wherein the performing the uplink communication comprises:
 transmitting, to the terminal, information indicating a type of scheduling for the terminal,   wherein the type of scheduling indicates whether a resource of the second cell is allocated by the first cell.   
     
     
         10 . The method of  claim 6 , wherein the performing the uplink communication comprises:
 performing the uplink communication with the terminal by using a signal including a cyclic prefix (CP), and   wherein the length of the CP is determined based on the capability information of the terminal and is longer than a length of an uplink switching time.   
     
     
         11 . A terminal in a wireless communication system, the terminal comprising:
 a transceiver; and   a controller coupled with the transceiver, and configured to:
 establish dual connectivity for a first cell and a second cell, 
 transmit capability information of the terminal, wherein the capability information includes information on a switching delay time required for uplink switching between the first cell and the second cell, 
 receive information on an uplink resource allocation information shared by the first cell and the second cell, and 
 perform an uplink communication with the at least one of the first cell or the second cell based on the information on the uplink resource allocation information, 
   wherein the uplink resource allocation is based on the information on the switching delay time, resources of the first cell and resources of the second cell, and   wherein the resources of the first cell and the resources of the second cell are multiplexed in time axis.   
     
     
         12 . The terminal of  claim 11 ,
 wherein the first cell is provided by a first base station (BS) supporting a first radio access technology (RAT), and the second cell is provided by a second BS supporting a second RAT that is different from the first RAT.   
     
     
         13 . The terminal of  claim 11 , wherein the controller is further configured to:
 if a conflict between the resources of the first cell and the resources of the second cell occurs, report an occurrence of the conflict,   wherein the uplink resource allocation information comprises monitoring information indicating whether the uplink switching is needed for a resource allocation.   
     
     
         14 . The terminal of  claim 12 , wherein the controller is further configured to:
 transmit, to the first BS, a first uplink signal including a cyclic prefix (CP);   perform the uplink switching from the first cell to the second cell;   transmit, to the second BS, a second uplink signal including the CP; and   if a timing advance (TA) for the first cell or a TA for the second cell is changed,   transmitting the changed TA.   
     
     
         15 . The terminal of  claim 11 , wherein the controller is further configured to:
 perform the uplink communication with the at least one of the first cell or the second cell by using a signal including a cyclic prefix (CP), and   wherein the length of the CP is determined based on the capability information of the terminal and is longer than a length of an uplink switching time.   
     
     
         16 . A base station (BS) in a wireless communication system, the BS comprising:
 a transceiver; and   a controller coupled with the transceiver, and configured to:
 establish dual connectivity with a terminal, 
 receive, from the terminal, capability information of the terminal, wherein the capability information includes information on a switching delay time required for uplink switching between a first cell of the BS and a second cell, 
 identify an uplink resource allocation shared by the first cell and the second cell based on the switching delay time, resources of the first cell and resources of the second cell, 
 transmit, to the terminal, information on the uplink resource allocation shared by the first cell and the second cell, and 
 perform an uplink communication with the terminal based on the information on the uplink resource allocation, 
   wherein the resources of the first cell and the resources of the second cell are multiplexed in time axis.   
     
     
         17 . The BS of  claim 16 ,
 wherein the first cell is provided by the BS supporting a first radio access technology (RAT), and the second cell is provided by another BS supporting a second RAT that is different from the first RAT.   
     
     
         18 . The BS of  claim 16 , wherein the controller is further configured to:
 receive, from the terminal, information on a timing advance (TA) of the terminal,   determine an uplink switching time of the terminal based on at least one of the switching delay time or the TA of the terminal, and   determine a resource to make empty such that a length of the empty resource is equal to or greater than the uplink switching time between the first cell and the second cell.   
     
     
         19 . The BS of  claim 16 ,
 wherein, in order to perform the uplink communication, the controller is configured to transmit, to the terminal, information indicating a type of scheduling for the terminal,   wherein the type of scheduling indicates whether a resource of the second cell is allocated by the first cell.   
     
     
         20 . The BS of  claim 16 , wherein, in order to perform the uplink communication, the controller is configured to:
 perform the uplink communication with the terminal by using a signal including a cyclic prefix (CP), and   wherein the length of the CP is determined based on the capability information of the terminal and is longer than a length of an uplink switching time.