User's Manual

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

4-9

If an error occurs during the procedure of changing the MS-initiated Idle Mode or network-

initiated Idle Mode, the RAS can start the BS-initiated network exit procedure. Below are

the cases in which the RAS starts the network exit procedure.

y Time out has occurred due to no response from the ACR or the fail indication is

notified from the ACR when the MS asked for the Idle Mode transition.

y Time out has occurred due to no response from the ACR or the fail indication is

notified from the ACR when the RAS asked for the Idle Mode transition.

Awake Mode Q Sleep Mode

Only the RAS can recognize whether the MS is in Awake or Sleep mode. The ACR

recognizes both states as Awake mode regardless of which mode the MS is actually in.

Figure 4.6 Awake Mode Q Sleep Mode State Transition Procedure

Category Description

(1)~(2) If there is no data transmission for a specific period of time (set by the MS/RAS using

a parameter) in the MS, its timer is timed out, and the MS transits from Awake mode

to Sleep mode. At this time, the MS sends the MOB_SLP-REQ message to the RAS.

The RAS sends the MS the MOB_SLP-RSP message as a response, and then the

MS transits to Sleep mode.

(3)~(4) If incoming traffic occurs for the MS in Sleep mode, the RAS sends the MS the

MOB_TRF-IND message at the listening cycle of the MS. When receiving this

message, the MS sends the RAS the UL BW Request message in which the BW

value is set to 0. When receiving this message, the RAS recognizes that the MS has

transited to Awake mode and sends traffic to the MS.

MS RAS ACR

2) MOB_SLP-RSP

1) MOB_SLP-REQ

Awake

Sleep

3) MOB_TRF-IND

4) BW Request Header

Awake

DL Traffic