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ASN Paging Controller and Location Registry Overview
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OL-22938-01
Table 50.
MS Initiated Idle Mode Entry Procedure Flow Description
Step
Description
1
MS decides to enter Idle Mode and sends DREG_REQ formatted as described in IEEE 802.16e.The De-Registration
Request code is set to 0x01 indicating that the MS intends to enter Idle Mode.
Request code is set to 0x01 indicating that the MS intends to enter Idle Mode.
2
Based on the MS‘s request, the serving ASN BS (Paging Agent) in Serving ASN sends an R6
IM_Entry_State_Change_Req message to its ASN Gateway. Timer TR4_IM_Entry_Req is started to monitor R6
IM_Entry_State_Change_Rsp at the serving ASN BS(PA).
IM_Entry_State_Change_Req message to its ASN Gateway. Timer TR4_IM_Entry_Req is started to monitor R6
IM_Entry_State_Change_Rsp at the serving ASN BS(PA).
3
The local Relay PC in Serving ASN Gateway chooses an Anchor PC for the MS and sends inter-ASN R4
IM_Entry_State_Change_Req message to the Anchor ASN associated with the chosen Anchor PC.Timer
TR4_IM_Entry_Req_ASN is started to monitor the R4 IM_Entry_State_Change_Rsp.
IM_Entry_State_Change_Req message to the Anchor ASN associated with the chosen Anchor PC.Timer
TR4_IM_Entry_Req_ASN is started to monitor the R4 IM_Entry_State_Change_Rsp.
4
The Anchor PC/LR, sends R4 IM_Entry_State_Change_Req to Anchor Authenticator to verify whether MS is allowed to
go in to Idle mode. Timer TR4_IM_Entry_Req_APC is started at this time to monitor the R4
IM_Entry_State_Change_Rsp from the Anchor Authenticator.This step is optional if the Anchor Authenticator and Anchor
PC/LR are collocated in the same ASN Gateway.
go in to Idle mode. Timer TR4_IM_Entry_Req_APC is started at this time to monitor the R4
IM_Entry_State_Change_Rsp from the Anchor Authenticator.This step is optional if the Anchor Authenticator and Anchor
PC/LR are collocated in the same ASN Gateway.
5
Anchor Authenticator checks if the MS is allowed to enter Idle Mode and saves necessary information if allowed, then
sends back R4 IM_Entry_State_Change_Rsp to Anchor PC/LR including MSID, IDLE mode authorization indication. If
Anchor Authenticator rejects the Idle mode entry request, the Idle Mode Authorization TLV contains the rejection code.
When R4 IM_Entry_State_Change_Rsp for MS entering Idle Mode is send successfully, Anchor Authenticator stores
Anchor PC ID for this MS. Upon reception of this message at Anchor PC, TR4_IM_Entry_Req_APC is stopped.This step
is optional if the Anchor Authenticator and Anchor PC/LR are collocated in the same ASN Gateway.
sends back R4 IM_Entry_State_Change_Rsp to Anchor PC/LR including MSID, IDLE mode authorization indication. If
Anchor Authenticator rejects the Idle mode entry request, the Idle Mode Authorization TLV contains the rejection code.
When R4 IM_Entry_State_Change_Rsp for MS entering Idle Mode is send successfully, Anchor Authenticator stores
Anchor PC ID for this MS. Upon reception of this message at Anchor PC, TR4_IM_Entry_Req_APC is stopped.This step
is optional if the Anchor Authenticator and Anchor PC/LR are collocated in the same ASN Gateway.
6
According to the reported information in R4 IM_Entry_State_Change_Rsp, based on the content of Idle mode
authorization indication IE, Anchor PC updates the LR with current MS location information (PGID) and other parameters,
and sends back R4 IM_Entry_State_Change_Rsp message to the Serving ASN Gateway. When this message is received at
serving ASN Gateway timer TR4_IM_Entry_Req_ASN is stopped.
authorization indication IE, Anchor PC updates the LR with current MS location information (PGID) and other parameters,
and sends back R4 IM_Entry_State_Change_Rsp message to the Serving ASN Gateway. When this message is received at
serving ASN Gateway timer TR4_IM_Entry_Req_ASN is stopped.
7
Serving ASN Gateway forwards the R6 IM_Entry_State_Change_Rsp to serving BS (PA) including IDLE Mode
authorization indication and accepted Paging parameters.Upon reception of this message at the BS, timer
TR6_IM_Entry_Req is stopped.
authorization indication and accepted Paging parameters.Upon reception of this message at the BS, timer
TR6_IM_Entry_Req is stopped.
8
Serving ASN BS sends DREG_CMD to the MS. The DREG_CMD conveys ―PC ID‖ field pointing to Anchor PC for the
MS and allocated Idle mode parameters.
MS and allocated Idle mode parameters.
9
After sending the DREG_CMD to the MS, the serving ASN BS(PA) acknowledges the successful delivery of
DREG_CMD to the local Relay PC in serving ASN Gateway by sending R6 IM_Entry_State_Change_Ack.
DREG_CMD to the local Relay PC in serving ASN Gateway by sending R6 IM_Entry_State_Change_Ack.
10,
11
11
The local Relay PC in serving ASN Gateway forwards the successful entry of MS in to Idle mode to the Anchor PC in
Anchor ASN Gateway by sending R4 IM_Entry_State_Change_Ack. Upon reception of this message at Anchor PC, timer
TR4_IM_Entry_Rsp is stopped.
Anchor ASN Gateway by sending R4 IM_Entry_State_Change_Ack. Upon reception of this message at Anchor PC, timer
TR4_IM_Entry_Rsp is stopped.
12
Anchor ASN Gateway associated with Anchor PC/LR updates the information of MS into LR database and sends Anchor
PC Indication message to Anchor DPF/FA to reflect the success of MS entering Idle Mode. Timer TR4_APC_Ind is started
at this time when Anchor PC Indication is send, to monitor the response.
PC Indication message to Anchor DPF/FA to reflect the success of MS entering Idle Mode. Timer TR4_APC_Ind is started
at this time when Anchor PC Indication is send, to monitor the response.
13
The Anchor DPF/FA finally updates the information of MS including the Anchor PC ID of this MS and acknowledges to
the Anchor PC/LR by Anchor PC Ack message. When Anchor PC Ack is received at Anchor ASN Gateway timer
TR4_APC_Ind is stopped.
the Anchor PC/LR by Anchor PC Ack message. When Anchor PC Ack is received at Anchor ASN Gateway timer
TR4_APC_Ind is stopped.
14
After the expiration of the Management Resource Holding Timer (an 802.16e parameter), serving BS initiates the related
R6 data Path Dereg procedure by sending R6 Path_Dereg_Req to the Anchor ASN Gateway.
R6 data Path Dereg procedure by sending R6 Path_Dereg_Req to the Anchor ASN Gateway.