Call setup procedure in an evolved third generation radio access network

Abstract

A method and system for call setup in an evolved third generation (3G) radio access network are disclosed. A wireless transmit/receive unit (WTRU) sends its identity to a core network (CN) for call setup when the WTRU is in an RRC_disconnected state. The CN verifies the identity and sends an authentication vector to the WTRU. The WTRU sends a service access request message including an authentication response to the CN via a Node-B. The Node-B performs an admission control. The CN attaches the WTRU if the authentication response is same to an expected response. The Node-B then allocates radio resources to the WTRU. The Node-Bs may be directly connected, or may be connected to a control plane server which performs admission control. When the WTRU is transitioning from an RRC_idle state to an RRC_connected state, the WTRU may or may not need to re-authenticate again.

1 . In a wireless communication system including a wireless transmit/receive unit (WTRU), a Node-B and a CN, a method for call setup, the method comprising: 
 the WTRU sending an initial access request message including an identity of the WTRU to the CN via the Node-B;    the CN verifying the identity of the WTRU and sending an authentication vector to the Node-B;    the Node-B sending an initial access response message to the WTRU, the initial access response message including an authentication request;    the WTRU sending a service access request message to the Node-B, the service access request message including an authentication response;    the Node-B performing an admission control procedure;    the Node-B forwarding the service access request message to the CN;    the CN performing an attachment procedure for the WTRU if the authentication response is same to an expected response; and    the Node-B allocating radio resources to the WTRU.    
   
   
       2 . The method of  claim 1  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       3 . The method of  claim 2  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       4 . The method of  claim 1  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       5 . The method of  claim 1  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       6 . The method of  claim 1  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       7 . The method of  claim 1  wherein the Node-B sends the initial access response message via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       8 . The method of  claim 7  wherein configuration for the DL SCH for transmission of the initial access response message is preconfigured.  
   
   
       9 . The method of  claim 1  further comprising: 
 if it is decided not to accept the WTRU, the Node-B selecting an alternate Node-B among a plurality of neighboring Node-Bs for handover; and    the Node-B informing the alternate Node-B, the WTRU and the CN about the handover.    
   
   
       10 . The method of  claim 1  further comprising: 
 the WTRU and the Node-B agreeing upon a time table for measurements after the call setup.    
   
   
       11 . The method of  claim 1  wherein the WTRU is in a radio resource control (RRC) disconnected state when sending the initial access request.  
   
   
       12 . The method of  claim 1  wherein the WTRU is in a radio resource control (RRC) idle state when sending the initial access request.  
   
   
       13 . In a wireless communication system including a wireless transmit/receive unit (WTRU), a Node-B, a control plane server and a CN, a method for call setup, the method comprising: 
 the WTRU sending an initial access request message including an identity of the WTRU to the CN via the Node-B and the control plane server;    the CN verifying the identity of the WTRU and sending an authentication vector to the control plane server;    the control plane server sending an authentication request for the WTRU to the Node-B;    the Node-B sending an initial access response message to the WTRU, the initial access response message including the authentication request;    the WTRU sending a service access request message to the Node-B, the service access request message including an authentication response;    the Node-B forwarding the service access request message to the control plane server;    the control plane server performing an admission control procedure;    the control plane server forwarding the service access request message to the CN;    the CN performing an attachment procedure for the WTRU if the authentication response is same to an expected response; and    the control plane server allocating radio resources to the WTRU.    
   
   
       14 . The method of  claim 13  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       15 . The method of  claim 14  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       16 . The method of  claim 13  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       17 . The method of  claim 13  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       18 . The method of  claim 13  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       19 . The method of  claim 13  wherein the Node-B sends the initial access response via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       20 . The method of  claim 19  wherein configuration for the DL SCH for transmission of the initial access response is preconfigured.  
   
   
       21 . The method of  claim 13  further comprising: 
 if it is decided not to accept the WTRU, the control plane server selecting an alternate Node-B among a plurality of neighboring Node-Bs for a handover; and    the control plane server informing the alternate Node-B, the WTRU and the CN about the handover.    
   
   
       22 . The method of  claim 13  further comprising: 
 the WTRU and the Node-B agreeing upon a time table for measurements after the call setup.    
   
   
       23 . The method of  claim 13  wherein the WTRU is in a radio resource control (RRC) disconnected state when sending the initial access request.  
   
   
       24 . The method of  claim 13  wherein the WTRU is in a radio resource control (RRC) idle state when sending the initial access request.  
   
   
       25 . In a wireless communication system including a wireless transmit/receive unit (WTRU), a Node-B and a CN, a method for call setup when the WTRU is in a radio resource control (RRC) idle state, the method comprising: 
 the WTRU sending a service access request message to the Node-B;    the Node-B performing an admission control procedure;    the Node-B sending the service access request message to the CN;    the CN sending a service access response message to the Node-B; and    the Node-B allocating radio resources to the WTRU.    
   
   
       26 . The method of  claim 25  wherein the WTRU sends the service access request message in response to a paging message for the WTRU.  
   
   
       27 . The method of  claim 26  wherein the paging message includes configuration for at least one of a random access channel (RACH), a downlink shared channel (DL SCH) and an uplink shared channel (UL SCH).  
   
   
       28 . The method of  claim 27  wherein the paging message indicates that the WTRU should be re-authenticated.  
   
   
       29 . The method of  claim 25  further comprising: 
 the WTRU sending an initial access request message to the Node-B, the initial access request message including an identity of the WTRU; and    the Node-B sending an initial access response message to the WTRU.    
   
   
       30 . The method of  claim 29  wherein the initial access response message indicates that the WTRU should be re-authenticated.  
   
   
       31 . The method of  claim 30  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       32 . The method of  claim 31  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       33 . The method of  claim 29  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       34 . The method of  claim 25  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       35 . The method of  claim 29  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       36 . The method of  claim 29  wherein the Node-B sends the initial access response message via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       37 . The method of  claim 36  wherein configuration for the DL SCH for transmission of the initial access response message is preconfigured.  
   
   
       38 . The method of  claim 25  further comprising: 
 if it is decided not to accept the WTRU, the Node-B selecting an alternate Node-B among a plurality of neighboring Node-Bs for handover; and    the Node-B informing the alternate Node-B, the WTRU and the CN about the handover.    
   
   
       39 . The method of  claim 25  further comprising: 
 the WTRU and the Node-B agreeing upon a time table for measurements after the call setup.    
   
   
       40 . In a wireless communication system including a wireless transmit/receive unit (WTRU), a Node-B, a control plane server and a CN, a method for call setup when the WTRU is in a radio resource control (RRC) idle state, the method comprising: 
 the WTRU sending a service access request message to the Node-B;    the Node-B sending the service access request message to the control plane server;    the control plane server performing an admission control procedure;    the control plane server sending the service access request message to the CN;    the CN sending a service access response message to the WTRU; and    the control plane server allocating radio resources to the WTRU.    
   
   
       41 . The method of  claim 40  wherein the WTRU sends the service access request message in response to a paging message for the WTRU.  
   
   
       42 . The method of  claim 41  wherein the paging message includes configuration for at least one of a random access channel (RACH), a downlink shared channel (DL SCH) and an uplink shared channel (UL SCH).  
   
   
       43 . The method of  claim 41  wherein the paging message indicates that the WTRU should be re-authenticated.  
   
   
       44 . The method of  claim 40  further comprising: 
 the WTRU sending an initial access request message to the Node-B, the initial access request message including an identity of the WTRU; and    the Node-B sending an initial access response message to the WTRU.    
   
   
       45 . The method of  claim 44  wherein the initial access response message indicates that the WTRU should be re-authenticated.  
   
   
       46 . The method of  claim 44  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       47 . The method of  claim 46  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       48 . The method of  claim 44  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       49 . The method of  claim 40  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       50 . The method of  claim 40  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       51 . The method of  claim 44  wherein the Node-B sends the initial access response message via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       52 . The method of  claim 51  wherein configuration for the DL SCH for transmission of the initial access response message is preconfigured.  
   
   
       53 . The method of  claim 40  further comprising: 
 if it is decided not to accept the WTRU, the control plane server selecting an alternate Node-B among a plurality of neighboring Node-Bs for handover; and    the control plane server informing the alternate Node-B, the WTRU and the CN about the handover.    
   
   
       54 . The method of  claim 40  further comprising: 
 the WTRU and the Node-B agreeing upon a time table for measurements after the call setup.    
   
   
       55 . A wireless communication system for call setup, the system comprising: 
 a wireless transmit/receive unit (WTRU) configured to send an initial access request message including an identity of the WTRU to a CN and send a service access request message to a Node-B, the service access request message including an authentication response which is computed in response to an authentication request sent by the CN;    the CN configured to verify the identity of the WTRU, send the authentication vector to the Node-B and perform an attachment procedure for the WTRU if the authentication response is same to an expected response; and    the Node-B configured to send an initial access response message to the WTRU, the initial access response message including the authentication request, perform an admission control procedure, forward the service access request message to the CN, and allocate radio resources to the WTRU.    
   
   
       56 . The system of  claim 55  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       57 . The system of  claim 56  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       58 . The system of  claim 55  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       59 . The system of  claim 55  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       60 . The system of  claim 55  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       61 . The system of  claim 55  wherein the Node-B sends the initial access response message via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       62 . The system of  claim 61  wherein configuration for the DL SCH for transmission of the initial access response message is preconfigured.  
   
   
       63 . The system of  claim 55  wherein the Node-B selects an alternate Node-B among a plurality of neighboring Node-Bs for handover if it is decided not to accept the WTRU, and informs the alternate Node-B, the WTRU and the CN about the handover.  
   
   
       64 . The system of  claim 55  wherein the WTRU and the Node-B are configured to agree upon a time table for measurements after the call setup.  
   
   
       65 . The system of  claim 55  wherein the WTRU is in a radio resource control (RRC) disconnected state when sending the initial access request.  
   
   
       66 . The system of  claim 55  wherein the WTRU is in a radio resource control (RRC) idle state when sending the initial access request.  
   
   
       67 . A wireless communication system for call setup, the system comprising: 
 a wireless transmit/receive unit (WTRU) configured to send an initial access request message including an identity of the WTRU to a CN via a Node-B and a control plane server and send a service access request message to the Node-B, the service access request message including an authentication response;    the CN configured to verify the identity of the WTRU and send an authentication vector to the control plane server and perform an attachment procedure for the WTRU if the authentication response is same to an expected response;    the control plane server configured to send an authentication request for the WTRU to the Node-B, perform an admission control procedure, forward the service access request message to the CN, and allocate radio resources to the WTRU; and    the Node-B configured to send an initial access response message to the WTRU, the initial access response message including the authentication request, and forward the service access request message to the control plane server.    
   
   
       68 . The system of  claim 67  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       69 . The system of  claim 68  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       70 . The system of  claim 67  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       71 . The system of  claim 67  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       72 . The system of  claim 67  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       73 . The system of  claim 67  wherein the Node-B sends the initial access response via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       74 . The system of  claim 73  wherein configuration for the DL SCH for transmission of the initial access response is preconfigured.  
   
   
       75 . The system of  claim 73  wherein the control plane server selects an alternate Node-B among a plurality of neighboring Node-Bs for a handover if it is decided not to accept the WTRU and informs the alternate Node-B, the WTRU and the CN about the handover.  
   
   
       76 . The system of  claim 67  wherein the WTRU and the Node-B are configured to agree upon a time table for measurements after the call setup.  
   
   
       77 . The system of  claim 67  wherein the WTRU is in a radio resource control (RRC) disconnected state when sending the initial access request.  
   
   
       78 . The system of  claim 67  wherein the WTRU is in a radio resource control (RRC) idle state when sending the initial access request.  
   
   
       79 . A wireless communication system for call setup when a wireless transmit/receive unit (WTRU) is in an idle state, the system comprising: 
 a WTRU configured to send a service access request message to a Node-B;    the Node-B configured to perform an admission control procedure, send the service access request message to a CN, and allocate radio resources to the WTRU; and    the CN configured to send a service access response message to the Node-B.    
   
   
       80 . The system of  claim 79  wherein the WTRU sends the service access request message in response to a paging message for the WTRU.  
   
   
       81 . The system of  claim 80  wherein the paging message includes configuration for at least one of a random access channel (RACH), a downlink shared channel (DL SCH) and an uplink shared channel (UL SCH).  
   
   
       82 . The system of  claim 80  wherein the paging message indicates that the WTRU should be re-authenticated.  
   
   
       83 . The system of  claim 79  wherein the WTRU is configured to send an initial access request message to the Node-B, the initial access request message including an identity of the WTRU and the Node-B is configured to send an initial access response message to the WTRU.  
   
   
       84 . The system of  claim 83  wherein the initial access response message indicates that the WTRU should be re-authenticated.  
   
   
       85 . The system of  claim 84  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       86 . The system of  claim 84  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       87 . The system of  claim 83  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       88 . The system of  claim 79  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       89 . The system of  claim 83  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       90 . The system of  claim 83  wherein the Node-B sends the initial access response message via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       91 . The system of  claim 90  wherein configuration for the DL SCH for transmission of the initial access response message is preconfigured.  
   
   
       92 . The system of  claim 79  wherein the Node-B selects an alternate Node-B among a plurality of neighboring Node-Bs for handover if it is decided not to accept the WTRU, and informs the alternate Node-B, the WTRU and the CN about the handover.  
   
   
       93 . The system of  claim 79  wherein the WTRU and the Node-B are configured to agree upon a time table for measurements after the call setup.  
   
   
       94 . A wireless communication system for call setup when a wireless transmit/receive unit (WTRU) is in an idle state, the system comprising: 
 a WTRU configured to send a service access request message to a Node-B;    the Node-B configured to send the service access request message to a control plane server;    a CN configured to send a service access response message; and    the control plane server configured to perform an admission control procedure, send the service access request message to the CN, send the service access response message to the WTRU, and allocate radio resources to the WTRU.    
   
   
       95 . The system of  claim 94  wherein the WTRU sends the service access request message in response to a paging message for the WTRU.  
   
   
       96 . The system of  claim 95  wherein the paging message includes configuration for at least one of a random access channel (RACH), a downlink shared channel (DL SCH) and an uplink shared channel (UL SCH).  
   
   
       97 . The system of  claim 95  wherein the paging message indicates that the WTRU should be re-authenticated.  
   
   
       98 . The system of  claim 94  wherein the WTRU is configured to send an initial access request message to the Node-B, the initial access request message including an identity of the WTRU, and the Node-B is configured to send an initial access response message to the WTRU.  
   
   
       99 . The system of  claim 98  wherein the initial access response message indicates that the WTRU should be re-authenticated.  
   
   
       100 . The system of  claim 98  wherein the WTRU sends the initial access request message via a random access channel (RACH).  
   
   
       101 . The system of  claim 100  wherein configuration for the RACH is included in system information broadcast by the Node-B.  
   
   
       102 . The system of  claim 98  wherein the initial access response message includes configuration for an uplink shared channel (UL SCH), whereby the WTRU sends the service access request message via the UL SCH.  
   
   
       103 . The system of  claim 98  wherein the service access request message includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       104 . The system of  claim 98  wherein the initial access request includes at least one of a reason for connection, a desired quality of service (QoS) and measurement information.  
   
   
       105 . The system of  claim 98  wherein the Node-B sends the initial access response message via one of a forward access channel (FACH) and a downlink shared channel (DL SCH).  
   
   
       106 . The system of  claim 105  wherein configuration for the DL SCH for transmission of the initial access response message is preconfigured.  
   
   
       107 . The system of  claim 98  wherein the control plane server is configured to select an alternate Node-B among a plurality of neighboring Node-Bs for handover if it is decided not to accept the WTRU, and inform the alternate Node-B, the WTRU and the CN about the handover.  
   
   
       108 . The system of  claim 98  wherein the WTRU and the Node-B are configured to agree upon a time table for measurements after the call setup.