Qualcomm Moderated Thread - please read rules before posting Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : Qualcomm Moderated Thread - please read rules before posting

QCOM 151.59

-0.4%

Jan 30 9:30 AM EST

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: Dexter Lives On who wrote (43691)	12/11/2004 4:49:02 AM
From: Raymond	Read Replies (2) of 197444

About message #43692 Why does this happens so often when you read technical articles.The writers get their technical information from one side and don't care to check it up or don't want to because it doesn't fit with the picture they want to give "although pre-standard technologies such as Wi-Lan’s Mobilis support hand-off at over 100 miles per hour, so the indications are good that WiMAX will be as mobile as HSDPA" WCDMA disadvantage "its uplink peak is 384Kbps" Enhanced uplink HSUPA will be out in real networks with uplink speeds up around 3.8 Mbit/s within 2 years. How many thinks that Wimax will be as mobile as WCDMA ever.I don't. It doesn't stop there.After 3GPP Rel6 with HSUPA comes Rel7 and so on with more features. "W-CDMA operators are stuck with a compromised technology with lower real world performance and lower spectral efficiency than EV-DO" In what way are WCDMA HSDPA less spectral efficient than EV-DO? In what way are WCDMA compromised? Their is no backward compatible issues for WCDMA to the GSM air interface.So what is he talking about. WCDMA has one big advantage compared with EV-DO which is always forgotten.Their is no limit what you can do at the same time on the same physical channel.Talk in the phone or video at the same time as you are doing a packet transmission for example. Another thing that is as important as Downlink max speeds is the round trip delay where HSDPA lowering it considerable compared to older type of Radio access bearers(RABs).One of the reasons for this is that they created a new retransmissionprotocol in the RBS:s and changed how often you can send a package on the air to 2 ms from 10 ms on older RABs HSDPA is also much more spectral efficient then the older RABs.You can use more of the maximum power of the cell.If the old max speeds where 384 kbps for a user you could get in much less users on a cell the then with 384kbps on HSDPA. The turbo coding rate is also much higher (Less codingbits in addition to the data bits) with HSDPA which together with 16QAM in addition to QPSK gives a higher throughput. The reason why I write all this stuff is just to show that the standards don't stand still.Everything is improving for every releaese of the standard. This is just one of the articles in a long row that compares WCDMA out in the field today with what other technologies can do in the future. I just have to repeat masa:s question. "I just have to say this: if q has "only one claim", but a competitor, well, let's say 5 or e.g. 50, who is paying what?" When this 5 basics patents is not valid any more.Will QCOM get any income at all from the other big companies in the cellular area or will it be the other way around when other companies basic WCDMA,EDGE,OFDM patents are still valid? /R

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next