Communication terminal, control device, communication system, and communication method

Abstract

To provide a communication terminal that ensures the coincidence of Paging timing between a UE and a control device when an eDRX parameter is updated in a control device, a communication terminal (10) according to the present disclosure includes a receiving unit (11) for receiving a Tracking Area Registration Accept message or a Location Registration Accept message sent from a control device (30), and a sending unit (12) for sending a Tracking Area Registration Complete message or a Location Registration Complete message to the control device (30) when a first eDRX (Extended Idle Mode DRX) parameter is contained in the Tracking Area Registration Accept message or the Location Registration Accept message.

1 . A terminal comprising:
 at least one processor; and   at least one memory coupled to the at least one processor, the at least one memory storing instructions that when executed by the at least one processor cause the at least one processor to:   send a Registration Request message including a first eDRX (Extended Idle Mode DRX) parameter to a control device in a network; and   receive a Registration Accept message sent from the control device, the Registration Accept message including a second eDRX parameter and a new GUTI (Globally Unique Temporary UE Identity) for the terminal if the network provides the second eDRX parameter which is different from the first eDRX parameter, wherein   the first eDRX parameter and the second eDRX parameter include a paging time window length value or an eDRX cycle value.   
     
     
         2 . The terminal according to  claim 1 , wherein the Registration Request is Attach Request. 
     
     
         3 . A control device in a network having a UE (User Equipment), the control device comprising:
 at least one processor; and   at least one memory coupled to the at least one processor, the at least one memory storing instructions that when executed by the at least one processor cause the at least one processor to:   receive, from the UE, a Registration Request message including a first eDRX (Extended Idle Mode DRX) parameter;   update the first eDRX parameter to a second eDRX parameter if the network provides the second eDRX parameter which is different from the first eDRX parameter;   assign a new GUTI (Globally Unique Temporary UE Identity) for the UE; and   send, to the UE, a Registration Accept message including the second eDRX parameter and the new GUTI, wherein   the first eDRX parameter and the second eDRX parameter include a paging time window length value or an eDRX cycle value.   
     
     
         4 . The control device according to  claim 3 , wherein the Registration Request is Attach Request. 
     
     
         5 . A method performed by a terminal, the method comprising:
 sending a Registration Request message including a first eDRX (Extended Idle Mode DRX) parameter to a control device in a network; and   receiving a Registration Accept message sent from the control device, the Registration Accept message including a second eDRX parameter and a new GUTI (Globally Unique Temporary UE Identity) for the terminal if the network provides the second eDRX parameter which is different from the first eDRX parameter, wherein   the first eDRX parameter and the second eDRX parameter include a paging time window length value or an eDRX cycle value.   
     
     
         6 . The method according to  claim 5 , wherein the Registration Request is Attach Request. 
     
     
         7 . A method performed by a control device in a network having a UE (User Equipment), the method comprising:
 receiving, from the UE, a Registration Request message including a first eDRX (Extended Idle Mode DRX) parameter;   updating the first eDRX parameter to a second eDRX parameter if the network provides the second eDRX parameter which is different from the first eDRX parameter;   assigning a new GUTI (Globally Unique Temporary UE Identity) for the UE; and   sending, to the UE, a Registration Accept message including the second eDRX parameter and the new GUTI, wherein   the first eDRX parameter and the second eDRX parameter include a paging time window length value or an eDRX cycle value.   
     
     
         8 . The method according to  claim 7 , wherein the Registration Request is Attach Request.