Cisco ASR 5000 series Product Overview page 187

ASN Gateway Overview
Figure 51.
MN
4
Table 36.
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.
OL-22938-02
BS initiated Uncontrolled Intra-ASN Gateway Handover Preparation Phase
Serving
ASN BS
Data Path Established
HO-Req
R8_HO_Req_Timer
Mob_Bsho-Req
HO-Ack
BS initiated Uncontrolled Intra-ASN Gateway Handover Preparation Phase Description
Target
ASN BS
1
2
HO-Rsp
3
5
ASN Call Procedure Flows ▀
Anchor ASN-GW/
Authenticator
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