White Paper V600

Multiple sessions

With regard to simultaneous connectivity, multiple sessions, Sony Ericsson supports the 3GPP™ (3rd Generation Partnership Project) specification 3GPP TS 22.101 which states that 3GPP specifications shall enable the user of a single terminal to establish and maintain several connections simultane- ously. It shall efficiently cater for applications which have variable requirements relating to specific QoS (Quality of Service) parameters (for example throughput) whilst meeting other targets.

Examples of use cases in 3G mode

• One voice and one packet data session:

Photo: A voice call is connected, a photo is taken with the integrated camera and sent, either via MMS or via email.

• Two simultaneous packet data sessions:

Streaming: A WAP browsing session is ongoing, an audio or video clip streaming session is started, for example, from a hyperlink.

Gradual change and development of 3G

The third-generation is a technology shift taking mobile telephony to a higher level. The term describes a new generation of wireless systems that offer services and functions far beyond the era when mobile phones were used for voice calls only.

When taking GSM customers into the world of 3G, operators will not have to switch their networks from one system to another. The move from 2G to 3G optimizes the existing infrastructure, enabling it to co-exist with the new WCDMA system.

GSM equipment – enhanced with GPRS – and its functions will continue to exist within the 3G sys- tem. Old and new technology will complement each other and form a highly flexible network sys- tem, with a capacity that gives new meaning to mobility.

Even when WCDMA is fully expanded, GSM-based parts of the network will continue to play a crucial role in serving the operators’ needs for capacity. All spectrum assets will be valuable, as there will be a substantial increase in both the number of subscribers and the volume of traffic in the networks. With a seamless solution, operators will have a flexible network where the systems interact according to current demand.

User experience

For the consumers, using a network consisting of GSM, GPRS and WCDMA parts will be a seamless experience. GPRS allows qualified mobile Internet applications, while the introduction of WCDMA brings a whole new set of user services, using the full potential of wideband data transport.

GSM and WCDMA development

Building the network

The combining of GSM with GPRS, and the introduction of WCDMA technology in a new spectrum, can be done gradually. The new wideband technology can be deployed in parallel with the enhancement of the existing spectrum, re-using parts of the GSM infrastructure.

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August 2005