User's Manual

CHAPTER 4. Message Flow

4-18

4.1.5 Paging

Paging can be divided into the following two types:

y By periodically broadcasting the MOB_PAG-ADV message, the RAS notifies the MS

of the corresponding paging group. Based on the paging information (Paging Cycle,

Paging Offset, and PGID) received from the system when the MS transits to Idle mode,

the MS checks whether its paging group has changed by periodically checking the

MOB_PAG-ADV message.

y When the ACR has traffic to send to the MS in Idle mode, it triggers the MOB_PAG-

ADV to the RAS to transit the MS to Awake mode.

The figure below shows the procedure for performing paging to the MS in Idle mode.

Figure 4.11 Paging Procedure

Category Description

(1)~(2) If the MS is in Idle mode when receiving a packet that will be sent to a specific MS,

the ACR sends the RAS the MS Paging Announce message containing the MAC

address and paging group ID, and Paging Cause (0x02) of the MS to the RAS.

The RAS sends the MS the MOB_PAG-ADV message containing the information

received from the ACR.

Then, the MS performs the QCS procedure with the network. For more information on the

QCS procedure, see to Idle Mode Æ Awake Mode of ‘State Transition’.

MS RAS ACR

1) MS Paging Announcement

2) MOB PAG-ADV

QCS

Incoming traffic