User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.02

Classification Description

(1)~(2) At this time, the procedure is different depending on whether the MIP-based

CMIP/PMIP method or the simple IP method is used. When the paging group is

changed, the MS sends the new T-RAS (Target RAS) an RNG-REQ message

including the MAC address, Location Update Request and Paging Controller ID

in order to request a location update. The T-RAS sends its default ACR a

Location Update Request message including the Paging Controller ID.

(3)~(5) If the received Paging Controller ID does not belong to the T-ACR (Target ACR),

it sends a Location Update Request message to the S-ACR (Serving ACR)

through the R4 interface in order to change the paging controller. At this point,

the APC Relocation Destination of the Location Update Request message is set

to the Paging Controller ID of the T-ACR. The S-ACR responds with a Location

Update Response message including confirmation of whether the paging

controller relocation is allowed or not and the Context information for the MS.

(6) When the T-RAS receives the Location Update Response message, it sends the

MS an RNG-RSP message with 'LU Response' set to 'Fail'.

(7)~(8) The LU Confirm message is sent to notify that the paging controller is maintained

in the S-ACR.

(9)~(14) The MS performs idle mode exit with the S-ACR, and the S-ACR induces full

network re-entry in the MS.

(15)~(31)

The MS performs network re-entry with the T-ACR

(32)~(39) This is the procedure that allocates an IP address to the MS that uses the simple

IP method. When the DHCP procedure is requested to allocate an IP address to

the MS, the ACR receives a simple IP address from the DHCP server and sends

it to the MS (DHCP Relay Agent mode).

(40)~(41) The T-ACR notifies the AAA server that accounting has begun for the service

flow newly generated in the network entry. When the Diameter protocol is used, it

is notified that accounting has begun for the service flow using the ACR/ACA

message. When the RADIUS protocol is used, the Accounting

Request/Accounting Response message is used.

Inter-ASN Location Update

The Inter-ASN location update procedure is the same with the Inter-ACR location update

procedure.