GPRS and 3G Services: Connectivity Options - O2

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Contents Page No. 3-4 5-7 5 6 7 7 8-10 8 10 11-12 11 12 13 14 15 15 15 16 17 Chapter No. 1. Executive Summary 2. Bearer Service 2.1. Overview 2.2. DataLink 2.3. Resilient DataLink 2.4. Application Support 3. Mobile Web 3.1. Overview 3.2. Application Support 4. Mobile Web VPN 4.1. Overview 4.2. Application Support 5. Service Comparison 6. Appendix 1: IP Addresses used by the O2 services 7. Private IP Addresses used by O2’s Mobile Web Service 7.1. No Optimisation 7.2. Full Optimisation 7.3. Web Optimisation 8. Glossary of Terms
1. Executive Summary O2’s General Packet Radio Service (GPRS) and Third Generation (3G) services offer high speed wireless packet data capabilities to mobile devices connected to the network. These services enable devices to attach to the network and then establish data connections via both public and private domains. These domains are defined by use of an Access Point Name (APN), which is similar in structure and function to an Internet domain name. In the context of this paper O2’s GPRS and 3G connectivity portfolio consists of three service offerings: • O2 Bearer Service: O2 provides private circuit(s) to connect the customer network to O2’s network. The customer can select between 2 Bearer Service products: a. DataLink – consists of a single leased line and a router installed on the customer premises. b. Resilient DataLink – resilience is provided via the use of two leased lines and two routers. • O2 Mobile Web service: full Internet access is provided. • O2 Mobile Web Virtual Private Network (VPN) service: this service was specifically introduced to allow customers to access their Local Area Network (LAN) environment via VPN technology. When determining which service is most appropriate to a particular customers needs it is envisaged a number of factors will be considered including the following: • Cost of the service: - The Bearer Service options require that a leased line(s) and router(s) be provided by O2 and there is a yearly rental cost associated with the link(s) and router(s). - If a company does not already have a method for allowing people to access the corporate LAN via the Internet, via a VPN gateway for instance, they may find it preferable to use O2’s Bearer Service and choose an authentication approach which meets their requirements. This approach may prove a cheaper option than deploying new Internet facing gateways and using O2’s Mobile Web or Mobile Web VPN services. - End users are only charged for the data they send and receive and O2’s standard charges are the same regardless of which service is utilised (i.e. Bearer Service, Mobile Web or Mobile Web VPN). • What applications and services are going to be used? - Is there a requirement to limit what Internet resources people can access via GPRS/3G? Users can access any Internet server via O2’s Mobile Web service – although it is noted that personal firewalls can be used as a way of “policing” what Internet resources people can use. - Is there a requirement to interact with the mobile device from a server – perhaps to poll the remote client for instance? This may not be possible if O2’s Mobile Web and Mobile Web VPN services are used. - Do the applications work if Port Address Translation (PAT) is being used – O2’s Mobile Web service utilises PAT. 3
Page 1: GPRS and 3G Services: Connectivity
Page 5 and 6: 2. Bearer Service 2.1. Overview O2
Page 7 and 8: 2.3. Resilient DataLink 2.4. Applic
Page 9 and 10: O2 Data Network GRE Tunnel Leased L
Page 11 and 12: 4. Mobile Web VPN 4.1. Overview O2
Page 13 and 14: 5. Service Comparison 5. Service Co
Page 15 and 16: 7. Private IP Addresses used by O2
Page 17: Glossary of Terms 8. Glossary of Te

GPRS and 3G Services: Connectivity Options - O2

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