Page 1
Ruckus Wireless™
SmartCell Gateway™ 200
S2a Interface Reference Guide
for SmartZone 3.4
Part Number 800-71172-001 Rev A
Published July 2016
www.ruckuswireless.com
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SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 2
Copyright Notice and Proprietary Information
Copyright 2016 Ruckus Wireless, Inc. All rights reserved.
No part of this documentation may be used, reproduced, transmitted, or translated, in any form or by any means,
electronic, mechanical, manual, optical, or otherwise, without prior written permission of Ruckus Wireless, Inc.
(“Ruckus”), or as expressly provided by under license from Ruckus.
Destination Control Statement
Technical data contained in this publication may be subject to the export control laws of the United States of America.
Disclosure to nationals of other countries contrary to United States law is prohibited. It is the reader’s responsibility to
determine the applicable regulations and to comply with them.
Disclaimer
THIS DOCUMENTATION AND ALL INFORMATION CONTAINED HEREIN (“MATERIAL”) IS PROVIDED FOR GENERAL
INFORMATION PURPOSES ONLY. RUCKUS AND ITS LICENSORS MAKE NO WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, WITH REGARD TO THE MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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MATERIAL IS ERROR-FREE, ACCURATE OR RELIABLE. RUCKUS RESERVES THE RIGHT TO MAKE CHANGES OR
UPDATES TO THE MATERIAL AT ANY TIME.
Limitation of Liability
IN NO EVENT SHALL RUCKUS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES, OR DAMAGES FOR LOSS OF PROFITS, REVENUE, DATA OR USE, INCURRED BY YOU OR ANY
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Trademarks
Ruckus Wireless, Ruckus, the bark logo, ZoneFlex, FlexMaster, ZoneDirector, SmartMesh, Channelfly, Smartcell,
Dynamic PSK, and Simply Better Wireless are trademarks of Ruckus Wireless, Inc. in the United States and other
countries. All other product or company names may be trademarks of their respective owners
Page 3
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 3
Contents
About This Guide
Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Online Training Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Documentation Feedback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1 Data Session and Path Management Messages
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Data Session Establishment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Path Management Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2 Tunnel Management Messages
Create Session Process Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Create Session Request Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Bearer Context - Create Session Request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Create Session Response Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Bearer Context - Create Session Response Messages . . . . . . . . . . . . . . . . . . . . . . . 20
Modify Bearer Command Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Bearer Context - Modify Bearer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Modify Bearer Request Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Modify Bearer Request Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Bearer Context - Modify Bearer Request Messages . . . . . . . . . . . . . . . . . . . . . . . . . 22
Modify Bearer Response Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Bearer Context - Modify Bearer Response Messages . . . . . . . . . . . . . . . . . . . . . . . . 23
Update Bearer Process Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Update Bearer Request Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bearer Context - Update Bearer Request Messages . . . . . . . . . . . . . . . . . . . . . . . . . 25
Update Bearer Response Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Bearer Context - Update Bearer Response Message . . . . . . . . . . . . . . . . . . . . . . . . 25
Delete Bearer Process Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Page 4
Contents
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 4
Delete Bearer Request Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Delete Bearer Response Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Bearer Context - Delete bearer response messages . . . . . . . . . . . . . . . . . . . . . . . . . 27
Delete Session Process Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Delete Session Request Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Delete Session Response Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Index
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SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 5
About This Guide
This SmartCell Gateway™ (SCG) 200 S2a Interface Reference Guide describes the
interface between the SCG and the Packet Data Network Gateway (PDN-GW). It
also describes the control plane GPRS (General Packet Radio Service) tunneling
protocol messages.
This guide is written for service operators and system administrators who are
responsible for managing, configuring, and troubleshooting Ruckus Wireless
devices. Consequently, it assumes a basic working knowledge of local area
networks, wireless networking, and wireless devices.
NOTE If release notes are shipped with your product and the information there
differs from the information in this guide, follow the instructions in the release notes.
Most user guides and release notes are available in Adobe Acrobat Reader Portable
Document Format (PDF) or HTML on the Ruckus Wireless Support Web site at
https://support.ruckuswireless.com/contact-us.
Page 6
About This Guide
Document Conventions
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 6
Document Conventions
Tab le 1 and Tab le 2 list the text and notice conventions that are used throughout
this guide.
Terminology
Tab le 3 lists the terms used in this guide.
Table 1. Text c onv ent ions
Convention Description Example
monospace
Represents information as it
appears on screen
[Device name]>
monospace bold Represents information that
you enter
[Device name]> set
ipaddr 10.0.0.12
default font bold Keyboard keys, software
buttons, and field names
On the Start menu, click All
Programs.
italics Screen or page names Click Advanced Settings.
The Advanced Settings page
appears.
Table 2. Notice conventions
Notice Type Description
NOTE
Information that describes important features or instructions
CAUTION!
Information that alerts you to potential loss of data or potential
damage to an application, system, or device
WARNING!
Information that alerts you to potential personal injury
Table 3. Terms used in this guide
Terminology Description
AAA Authentication, Authorization, and Accounting
AMBR Aggregate Maximum Bit Rate
APN Access Point Name
DNS Domain Name System
EBI EPS Bearer ID
Page 7
About This Guide
Ter minology
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 7
EPC Evolved Packet Core
EPS Evolved Packet System
F-TEID Fully Qualified Tunnel Endpoint Identifier
GPDU GTP Packet Data Unit
GPRS General Packet Radio Service
GSN APN GPRS serving node, is application module in the SCG handling
GTP messages
GTP GPRS Tunneling Protocol
GTPv1-U GTP version 1, user plane
GTPv2-C GTP version 2, control plane
IE Information Element
IMSI International Mobile Subscriber Identity
IP Internet Protocol
MCC Mobile Country Code
MNC Mobile Network Code
MSISDN Mobile Subscriber ISDN Number
PAA PDN Address Allocation
PCO Protocol Configuration Options
PDN Packet Data Network
PGW PDN Gateway
SGW Serving Gateway
ULI User Location Information
UMTS Universal Mobile Telecommunications Systems
UTRAN UMTS Terrestrial Radio Access Network
Table 3. Terms used in this guide
Terminology Description
Page 8
About This Guide
References
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 8
References
Tab le 4 lists the references used in this guide.
Legend
Tab le 5 lists the legend/presence used in this guide.
Related Documentation
For a complete list of documents that accompany this release, refer to the Release
Notes.
Online Training Resources
To access a variety of online Ruckus Wireless training modules, including free
introductory courses to wireless networking essentials, site surveys, and Ruckus
Wireless products, visit the Ruckus Wireless Training Portal at:
https://training.ruckuswireless.com
Table 4. References used
Serial
Number
Reference Description
1 29274-b20.docx • 3GPP TS 29.274 V11.2.0 (2012-03) 3GPP
Evolved Packet System (EPS)
• Evolved General Packet Radio Service (GPRS)
• Tunneling Protocol for Control plane (GTPv2-C)
• Stage 3 (Release 11)
Table 5. Legend/presence used in this guide
Legend/Presence/
Value
Description
C Conditional
Instance Value The Instance Value column indicates the instance number of the
IE, which is used in differentiating between two instances of same
IE, i.e., IE with the same type in the same message.
M Mandatory
O Optional
Page 9
About This Guide
Documentation Feedback
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 9
Documentation Feedback
Ruckus Wireless is interested in improving its documentation and welcomes your
comments and suggestions. You can email your comments to Ruckus Wireless at:
docs@ruckuswireless.com
When contacting us, please include the following information:
• Document title
• Document part number (on the cover page)
• Page number (if appropriate)
For example:
• Ruckus Wireless Administrator Guide for SmartZone 3.4
• Part number: 800-71105-001
• Page 400
Page 10
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 10
1
Data Session and Path
Management Messages
In this chapter:
• Overview
• Data Session Establishment
• Path Management Messages
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Data Session and Path Management Messages
Overview
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 11
Overview
This reference guide describes the interface between the SmartCell Gateway (SCG)
with Packet Data Network Gateway (PDN-GW). It describes the control plane GPRS
(General Packet Radio Service) tunneling protocol messages v2 for EPS (Evolved
Packet System) interfaces (GTPv2-C) from the SCG and PGW. This guide lists all
the interface messages and GPRS Tunneling Protocol (GTP-C) information element
used between the SCG and PGW.
The S2a interface is used in control signaling between the SCG and PDN-GW
(Packet Data Network Gateway) as well as for tunneling end user data payload within
the backbone network between both the nodes in EPC (Evolved Packet Core)
network.
The GPRS Tunneling Protocol (GTP) transmits user data packets and signaling
messages between the SCG and PDN-GW. GTP encapsulates traffic and creates
GTP tunnels, which acts as virtual data channels for transmission of packet data
between the SCG and PDN-GW. A GTP tunnel is established between the SCG
and PDN-GW through Create Session Request procedure for a data session
initiated from UE.
The SCG acts as trusted non-3GPP access network (TWAN) towards PDN-GW
with S2a (GTPv2) interface. In case the operator EPC network does not support the
S2a interface, the SCG can be statically configured to support S5 (GTPv2) interface,
in which case the SCG acts as Serving Gateway (SGW).
A GTP tunnel is identified by a pair of IP addresses and a pair of GTP Tunnel End
Point Identifiers (TEIDs), where one IP address and TEID is for the SCG (TWAN) and
the other is for the PGW. The TEID is a session identifier used by GTP protocol
entities in the SCG and in the PGW. GTP separates signaling from payload. Traffic
is sorted onto a control plane (GTP-C) for signaling and a user plane (GTP-U) for
user data. GTP-C is a tunnel control and management protocol and is used to
create, modify and delete tunnels. GTP-U is a tunneling mechanism, which provides
a service for carrying user data packets. On both planes, a GTP header encapsulates the data packet, called GTP Packet Data Unit (GPDU), and a path implemented
by UDP/IP is used as bearer of the GTP traffic. Figure 1 shows the deployment of
the SCG in operator networks with 3G and EPC.
Page 12
Data Session and Path Management Messages
Overview
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 12
Figure 1. Deployment of SCG with 3G and EPC
The SCG supports the following categories of GTP signaling traffic:
• Path Management Messages: The main purpose of these messages is to
supervise an UDP/IP path to ensure that connectivity failure can be detected on
time. This is managed by frequently sending GTP Echo or Echo response
packets between SCG and PGW.
• Tunnel Management Messages: These contain messages that establish, modify
and release GTP tunnels.
NOTE: The SCG support for STA interface is being considered for the future release.
NOTE: Refer to About This Guide for the conventions used in this guide.
Page 13
Data Session and Path Management Messages
Data Session Establishment
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 13
Data Session Establishment
Figure 2 depicts session establishment based on the session such as create, modify,
update and so on.
Figure 2. Data session establishment
Page 14
Data Session and Path Management Messages
Path Management Messages
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 14
Path Management Messages
Path management messages, monitors the health of the transport between GTPC peers, which is the SCG and PGW. Figure 3 shows the path management
messages process flow and Ta bl e 6 lists the attribute.
NOTE: GSN APP is GPRS serving node which is an application module in the SCG
for handling GTP messages.
Figure 3. Path management messages
Table 6. Echo request message
Attribute Presence Comment
Recovery M SCG/PGW updates the local restart counter in this
IE
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SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 15
2
Tunnel Management Messages
In this chapter:
• Create Session Process Flow
• Modify Bearer Command Flow
• Modify Bearer Request Flow
• Update Bearer Process Flow
• Delete Bearer Process Flow
• Delete Session Process Flow
Page 16
Tunnel Management Messages
Create Session Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 16
Tunnel management messages, manages the tunnel between GTP-C peers, which
includes create, update, modify and delete procedures.
Create Session Process Flow
Figure 4 shows the process flow for create session. This section covers:
• Create Session Request Messages
• Create Session Response Messages
Figure 4. Create session
Create Session Request Messages
Tab le 7 lists the create session request messages attributes. This section covers:
• Bearer Context - Modify Bearer
NOTE: The Instance Value column indicates the instance number of the IE, which
is used in differentiating between two instances of same IE, i.e., IE with the same
type in the same message.
Table 7. Create session - request messages
Attribute Instance
Value
Presence Interface (S2a,
S5 Both)
Description
IMSI 0 C Both IMSI of the subscriber.
MSISDN 0 C Both MSISDN received from HLR or AAA server
during authentication.
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Tunnel Management Messages
Create Session Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 17
Serving
Network
0 C Both MCC and MNC as configured in the SCG
web interface. This attribute will not be
present if it is not configured in the SCG
web interface.
RAT Type 0 M Both For S5 interface value is 6 (EUTRAN) and
for S2a interface the value is 3 (WLAN).
Indication 0 C Both Value is set to zero.
F-TEID 0 M S2a Sender F-TEID for control plane, SCG
generated TEID
F-TEID 1 M S5 Sender F-TEID for control plane, SCG
generated TEID
APN 0 M Both Access Point Name (APN), APN NI+OI
Selection
Mode
0 C Both The value shall be set to “MS or network
provided APN, subscription verified”
PDN Type 0 C S5 Set to IPV4
PAA 0 C Both PDN Address allocation, set to 0.0.0.0
AMBR 0 C Both Aggregate Maximum Bit Rate (APN-
AMBR), configurable in ttg_pdg.cfg
Bearer Context M Both Bearer context is created
Recovery 0 C Both This attribute is included if its contacting the
peer node for the first time
Charging
Characteristics
0 C Both Mandatory in case of SCG, CC received
form HLR/HSS or default value in SCG if
not received form external entity
Maximum APN
Restriction
0 C S5 Value is set to zero, this value is set to the
least restrictive type
User Location
Information
(ULI)
0 C S5 User Location Information (ULI), MCC MNC
from UE realm
Table 7. Create session - request messages (Continued)
Attribute Instance
Value
Presence Interface (S2a,
S5 Both)
Description
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Tunnel Management Messages
Create Session Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 18
Bearer Context - Create Session Request
Tab le 8 lists the attributes of bearer context for create session request messages.
Create Session Response Messages
Tab le 9 lists the attribute for create session response messages. This section covers:
• Bearer Context - Create Session Response Messages
Table 8. Bearer context - request messages
Attribute Instance
Value
Presence Interface Description
EBI 0 M Both EPS Bearer ID
Bearer QoS 0 M Both Bearer Level QoS
F-TEID 2 C S5 S5-U SGW F-TEID
F-TEID 6 C S2a S2a-U TWAN F-TEID
Table 9. Create session response message
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Cause 0 M Both Cause in response message.
Change Reporting
Action
0C S5
F-TEID 1 C Both Includes the TEID in the GTP based
interfaces
PAA 0 C Both PDN Address Allocation
APN Restriction 0 C S5 APN restriction
AMBR 0 C Both Aggregate Maximum Bit Rate (APN-
AMBR), is included only if the received
APN-AMBR is modified by the PCRF.
Charging Gateway
Address
0 O S5 PGW may include CGF IP address
provided the CGF server IP address
is configured in the user interface. The
SCG sets this server with highest
priority, for sending generated CDR's.
Bearer Context 0 M Both Includes the QoS, Charging ID along
with other attributes
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Tunnel Management Messages
Create Session Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 19
Recovery 0 C Both Included only if the peer node is
contacted for the first time.
FQDN 0 C S5 Charging gateway name
IP Address 0 C S5 Charging gateway address
Protocol
Configuration
Options (PCO)
0 O S2a PGW could include this IE on the S2a
interface to provide TWAN with
additional IP configuration
parameters (example, DNS server).
This IE is included provided a
corresponding request is received in
the Create Session - request
message.
EPC Timer 0 O S5 PGW Back-Off Time, PDN-GW
rejects the Create Session Request
with the cause “APN congestion”. It
indicates the time during which the
peer should refrain from sending
subsequent PDN connection
establishment requests to the PGW
for the congested APN for services
other than Service Users/emergency
services.
Note: Not supported in this release
IPv4 Configuration
Parameters
(IP4CP)
0 CO S2a Trusted WLAN IPv4 Parameters
Note: Not supported in this release
Private Extension 0 O Both Private Extension
Note: Not supported in this release
Table 9. Create session response message (Continued)
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Page 20
Tunnel Management Messages
Modify Bearer Command Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 20
Bearer Context - Create Session Response Messages
Tab le 10 lists the bearer context attributes for create session response messages.
Modify Bearer Command Flow
Figure 5 shows the modify bearer process flow. Tab le 11 lists the modify bearer
attributes. This section covers:
• Bearer Context - Modify Bearer
Figure 5. Modify bearer
Table 10. Bearer context for create session response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Cause 0 M Both Cause in response message.
EBI 0 M Both EPS Bearer ID
Bearer QoS 0 C Both Bearer Level QoS
TFT 0 O Both Bearer modification and TFT
change
F-TEID 2 C S5 S5-U PGW F-TEID
F-TEID 5 C S2a S2a-U PGWF-TEID
Charging ID 0 O Both Charging ID
Bearer Flag 0 O S5 Bearer flag
Page 21
Tunnel Management Messages
Modify Bearer Request Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 21
Bearer Context - Modify Bearer
Tab le 12 lists the attributes of bearer context.
Modify Bearer Request Flow
Figure 6 shows the bearer process flow of request and response messages, when
modified. This section covers:
• Modify Bearer Request Messages
• Modify Bearer Response Message
Figure 6. Modify bearer request and response messages
Table 11. Modify bearer
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Bearer Context 0 M Both Modified bearer context
AMBR 0 M Both Aggregate Maximum Bit Rate (APN-
AMBR)
Table 12. Bearer context - Modify bearer
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 M Both EPS Bearer ID
Bearer QoS 0 C Both Bearer Level QoS
Page 22
Tunnel Management Messages
Modify Bearer Request Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 22
Modify Bearer Request Messages
Tab le 13 lists the attributes of modified bearer request messages. This section
covers:
• Modify Bearer Request Messages
NOTE: In release 11 specifications, Modify Bearer Request is not supported in an
S2a interface. To support roaming scenarios Ruckus Wireless assumes that this
message is required for S2a interface. Ruckus Wireless will continue with this
implementation until 3GPP specification has proper roaming scenarios for S2a
interface.
Bearer Context - Modify Bearer Request Messages
Tab le 14 lists the attributes of bearer context request messages for modify bearer.
Table 13. Modify bearer request messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
ULI 0 C S5 User Location Information
Serving Network 0 C S5 Serving network
RAT Type 0 C Both For S5 the interface value is 6
(EUTRAN) and for S2a interface the
value is 3 (WLAN).
Indication 0 Both Indication flags
F-TEID 0 Both Sender F-TEID for control plane
Bearer Context 0 C Both Bearer Contexts to be modified
Recovery 0 C Both Included only if the peer node is
contacted for the first time.
Table 14. Bearer context - Modify bearer request messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 M Both EPS Bearer ID
TEID 1 C Both Data Plane TEID
Page 23
Tunnel Management Messages
Modify Bearer Request Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 23
Modify Bearer Response Message
Tab le 15 lists the modified bearer response messages. This section covers:
• Bearer Context - Modify Bearer Response Messages
Bearer Context - Modify Bearer Response Messages
Tab le 16 lists the attributes of bearer context response messages for modify bearer.
Table 15. Modify bearer response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Cause 0 M Both Possible causes could be:
• Request accepted
• Request accepted partially
• Context not found
• Service not supported
MSISDN 0 C Both MSISDN
EBI 0 C Both Linked EPS Bearer ID
AMBR 0 C Both Aggregate Maximum Bit Rate (APN-
AMBR), is included only if the
received APN-AMBR is modified by
the PCRF
Bearer Context 0 M Both Bearer contexts modified
Change
Reporting Action
0C Both
Recovery 0 C Both Included only if the peer node is
contacted for the first time.
Table 16. Bearer context - Modify bearer response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 M Both EPS Bearer ID
Cause 0 M Both Cause
Charging ID 0 O S5 Charging ID
Page 24
Tunnel Management Messages
Update Bearer Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 24
Update Bearer Process Flow
Figure 7 shows the bearer process flow, when updated. This section covers:
• Update Bearer Request Messages
• Update Bearer Response Message
Figure 7. Update Bearer
Update Bearer Request Messages
Tab le 17 lists the update bearer request messages. This section covers:
• Bearer Context - Update Bearer Request Messages
Table 17. Update bearer request messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Bearer Context 0 M Both Modified bearer context
PCO 0 C S5 Protocol Configuration Option
AMBR 0 C Both Aggregate Maximum Bit Rate (APN-
AMBR)
Private
Extension
0 O Both Private extension
Page 25
Tunnel Management Messages
Update Bearer Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 25
Bearer Context - Update Bearer Request Messages
Tab le 18 lists the attributes of bearer context for update bearer request messages.
Update Bearer Response Message
Tab le 19 lists the update bearer response messages. This section covers:
• Bearer Context - Update Bearer Response Message
Bearer Context - Update Bearer Response Message
Tab le 20 lists the attributes of bearer context for update bearer response message.
Table 18. Bearer context - Update bearer request messages
Attribute Presence Interface
(S2a, S5, Both)
Description
EBI M Both EPS Bearer ID
Bearer QoS C Both Bearer level QoS
TFT C Both Bearer modification and change
PCO CO S5 Protocol Configuration Option
Table 19. Update bearer response messages
Attribute Presence Interface
(S2a, S5, Both)
Description
Cause M Both Cause value
Bearer Context O Both Failed bearer context
Recovery C Both Included only if the peer node is contacted for
the first time.
PCO C/O S5 Protocol Configuration Options (PCO) contains
PCO from HLR or PCO received from PDN-GW
in Create Session Response
Table 20. Bearer context - Update bearer response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 M Both EPS Bearer ID
Cause 0 M Both Indicates if the bearer handling was
successful and if not successful,
displays the reasons
Page 26
Tunnel Management Messages
Delete Bearer Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 26
Delete Bearer Process Flow
Figure 8 shows the bearer process flow, when updated. This section covers:
• Delete Bearer Request Messages
• Delete Bearer Response Messages
Figure 8. Delete bearer
Delete Bearer Request Messages
Tab le 21 lists the delete bearer request messages.
PCO 0 CO S5 Protocol Configuration Options (PCO)
contains PCO from HLR or PCO
received from PDN-GW in Create
Session Response
Table 21. Delete bearer request messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 C Both Linked EPS Bearer ID (LBI)
EBI 1 C Both EPS Bearer IDs
Bearer Context 0 O S5 Failed bearer context
PCO 0 C S5 Protocol Configuration Options (PCO)
Table 20. Bearer context - Update bearer response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Page 27
Tunnel Management Messages
Delete Session Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 27
Delete Bearer Response Messages
Tab le 22 lists the delete bearer response message attributes. This section covers:
• Bearer Context - Delete bearer response messages
Bearer Context - Delete bearer response messages
Tab le 23 lists the attributes of delete bearer context.
Delete Session Process Flow
This section covers:
• Delete Session Request Message
• Delete Session Response Message
Table 22. Delete bearer response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Cause 0 M Both Cause value
EBI 0 C Both Linked EPS Bearer ID (LBI)
Bearer Context 0 O Both Considers it as a failed bearer context
when SCG fails to delete the bearer
Recovery 0 C Both Included only if the peer node is
contacted for the first time.
Table 23. Bearer context - Delete bearer response messages
Attributes Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 M Both EPS Bearer ID (LBI)
Cause 0 M Both Indicates if the bearer handling was
successful. If it is not successful, the
reason is displayed.
Page 28
Tunnel Management Messages
Delete Session Process Flow
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 28
Delete Session Request Message
Tab le 24 lists the attribute for delete session request message.
Delete Session Response Message
Tab le 25 lists the delete session response message attributes.
Table 24. Delete session request messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
EBI 0 C Both Linked EPS Bearer ID (LBI)
Table 25. Delete session response messages
Attribute Instance
Value
Presence Interface
(S2a, S5, Both)
Description
Cause 0 M Both Cause value
Recovery 0 C Both Included only if the peer node is
contacted for the first time.
Private
Extension
0 O Both Private extension
Page 29
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 29
Index
A
AMBR 17, 18, 21, 23, 24
APN 17
APN restriction 18
B
bearer context 17, 18, 21, 22, 23, 24,
26, 27
bearer context - create session request
18
bearer context - create session response
messages
20
bearer context - delete bearer response
messages
27
bearer context - modify bearer 21
bearer context - modify bearer response
messages
23
bearer context - update bearer response
message
25
bearer context update bearer request
message
25
bearer flag 20
bearer QoS 18, 20, 21, 25
C
cause 18, 20, 23, 25, 27, 28
change reporting action 18, 23
charging characteristics 17
charging gateway address 18
charging ID 20, 23
create session 16
create session request messages 16
create session response messages 18
D
data session establishment 13
delete bearer 26
delete bearer request messages 26
delete bearer response messages 27
delete session 27
delete session response message 28
E
EBI 18, 20, 21, 22, 23, 25, 26, 27, 28
EPC 11
EPC Timer 19
EPS 11
F
FQDN 19
F-TEID 17, 18, 20, 22
G
GPDU 11
GPRS 11
GTP-C 11
GTP-U 11
GTPv2-C 11
I
IMSI 16
indication 17, 22
IP Address 19
IP4CP 19
M
maximum APN restriction 17
modify bearer 21
modify bearer process flow 20
modify bearer request 22
modify bearer request messages 22
modify bearer response message 23
MSISDN 16, 23
P
PAA 17, 18
packet data network gateway 11
path management messages 12
PCO 19, 24, 25, 26
PDN Type 17
private extension 19, 24, 28
Page 30
Index
SCG™ 200 S2a Interface Reference Guide for SmartZone 3.4, 800-71172-001 Rev A 30
R
RAT Type 17, 22
recovery 14, 17, 19, 22, 23, 27, 28
S
S2a interface 11
selection mode 17
Serving Gateway 11
serving network 17, 22
T
TEID 11, 22
TFT 20, 25
tunnel management messages 12
TWAN 11
U
ULI 17, 22
update bearer 24
update bearer request message 24
update bearer response message 25
Page 31
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