User's Manual

Mobile WiMAX RAS SPI-2L10 System Description/Ed.00

4-7

4.1.3 State Transition

Awake Mode Æ Idle Mode (MS-Initiated)

If there is no traffic transmission for a specific period of time, the MS transits from Awake

mode to Idle mode.

Sleep Mode Æ Idle Mode Transition

The MS in Sleep mode does not directly transit to Idle mode. This is because,

before the MS transits from Sleep mode to Idle mode, it first transits to Awake

mode and requests DREG before transiting to Idle mode.

The deregistration procedure for transiting to Idle mode is divided into MS-initiated Idle

mode transition and Network-initiated Idle mode transition. The figure below shows the

MS-initiated idle mode transition procedure.

Figure 4.4 Awake Mode Æ Idle Mode State Transition Procedure (MS-Initiated)

Category Description

(1)

When the MS transits to Idle mode, it creates the DREG-REQ message and sends it

to the RAS. The De-Registration Request Code field value is set to 0x01.

(2)~(5)

The RAS creates the IM_Entry_State_Change_Req message containing the context

information of the MS and sends it to the ACR (paging controller). The ACR creates

the IM_Entry_State_Change_Rsp message containing Action Code (0 × 05), paging

information(PAGING_CYCLE, PAGING_OFFSET), and Idle Mode Retain flag and

sends it to the RAS. The RAS sends the MS the DREG-CMD message containing

the information received.

(6)~(8) If no network reentry request is received from the MS until the Idle Resource Retain

timer expires, the RAS performs the Data Path (DP) Release procedure with the ACR.

MS RAS ACR

4) DREG-CMD

1) DREG-REQ

(Code=0x01, Paging Cycle Request)

2) IM_Entry_State_Change_Req

3) IM_Entry_State_Change_Rsp

(ActionCode, Paging Controller ID,

Paging Information)

6) Path_Dereg_Req

7) Path_Dereg_Rsp

8) Path_Dereg_Ack

AAA

5) IM_Entry_State_Change_Ack

‘Idle Mode Noti On’ Case

9) Diameter: ACR/RADIUS: Accounting Request

10) Diameter: ACA/RADIUS: Accounting