Cisco ASR 5000 Series User Manual

ASN Gateway Overview
ASN Call Procedure Flows ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Figure 51. BS initiated Uncontrolled Intra-ASN Gateway Handover Preparation Phase
Serving
ASN BS
Anchor ASN-GW/
Authenticator
MN
Data Path Established
1
3
Target
ASN BS
5
4
2
R8_HO_Req_Timer
HO-Req
HO-Rsp
Mob_Bsho-Req
HO-Ack
Table 36. BS initiated Uncontrolled Intra-ASN Gateway Handover Preparation Phase Description
Step
Description
1
In BS initiated HO scenario, the serving BS sends HO_Req messages to target BS from its peer list and starts R8_HO_Req
timer.
2
Targeted BS tests the acceptability of the requested HO by comparing the amount of available resources and required
bandwidth/QoS parameters in the HO request received from serving BS.
3
Once a target BS accepts the request it sends the HO_Rsp message to the serving BS.
4
Serving BS sends MOB_MSHO_RSP response t o MS.
5
Serving BS sends HO_Ack message to the target BS and HO preparation phase is completed.
HO Action Phase
The following figure and table describe the call flow for the steps involved in an uncontrolled intra-ASN Gateway
handover action phase between two BSs.

Cisco ASR 5000 Series Specifications

General

Brand	Cisco
Model	ASR 5000 Series
Category	Network Router
Language	English