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Technology Stocks : Nokia (NOK)

NOK 6.970

+2.0%

3:59 PM EST

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To: mightylakers who wrote (6894)	8/6/2000 4:28:41 AM
From: Raymond	Read Replies (2) of 34857

Mighty! You are totally confused when it comes to WCDMA.It is correct that new basestations will be used for WCDMA.They can handle data(including IP communication) and voice.In the GSM world(including WCDMA!!!) the IP traffic is routed from the radio accesss network to the SGSN and onto GGSN.The GGSN is sort of a router that is connected to the internet.The SGSN:s and GGSN:s are adding security features and other things that is useful in the mobile environment but basically they are just a pipe onto the IP network.Of course it should be possible to connect directly to the internet without using the SGSN and GGSN in the same way as it is done in CDMA2000.Probably a cheaper way to do it.But you will get a Ford Fiesta instead of a Mercedes. Another thing Japan Telecom and Docomo will go in service in 2001.A lot of europeans "Thanks for reminding, tell me how that network gonna route its data via your SGSN, GPRS networks then connect to Internet via GGSN." You are explaining it perfectly.Japan Telecom will buy SGSN,GGSN and WCDMA RAN and connect the IP traffic to internet via this nodes.The voicetraffic will in the beginning go via WCDMA RAN and GSM MSC:s.Later on when the QUOS issues has been resolved voicetraffic could go via the SGSN and GGSN nodes as well. About speeds.384 kbps will be used from the beginning in the downlink to the mobile.In the uplink it depends on the mobile manufacturers how high speed they will be willing to implement.But the minimum speed to use will be 64kbps and max 384.The 2Mbps is not used in the mobile environment(wide area) The problem with the higher speed is that you need more basestations.Lower spreading factors in a CDMA system means less coverage.(There is a advantage with GSM EDGE they have the same coverage with higher speeds).You can do 384kbps in different ways either with multiple codes with a higher spreading factor or single code with a lower spreading code both are allowed in the standard. But if Docomo and the rest decides to put enough basestations and I am sure they will we will se 384kbps in service in Japan next year. /R

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