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Technology Stocks : Nokia Corp. (NOK)

NOK 5.935

+1.1%

Nov 21 9:30 AM EST

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To: 49thMIMOMander who wrote (1618)	10/28/2001 3:04:44 PM
From: Eric L	Read Replies (1) of 9255

re: 1xRTT Synch-Channel Issue in 3GPP2 Nokia problem of course solved but 3GPP2 TSG-C WG2 still bogged down trying to figure out how to get around the problem. Several other contributions in October but key document here. ftp://ftp.3gpp2.org/TSGC/Working/TSG-C_0110/TSG-C_0110_CheJu/Plenary/C00-20011015-102 (WGII MTG-Summary(October)).doc A good contribution by Nortel somewhat explains the root of the issue and some of the complications in resolving it: ftp://ftp.3gpp2.org/TSGC/Working/TSG-C_0110/TSG-C_0110_CheJu/Plenary/ C00-20011015-102A This contribution proposes a method to limit the length of the Sync Channel Message (SCHM) in an IS-2000-A system to 27 octets. This is to avoid problems that occur in some IS95 mobiles when the SCHM reaches 28 octets (the so-called “Sync Channel Issue”). In IS-95B, the length of the SCHM is 208 bits. In IS-2000 Release 0, an 11-bit EXT_CDMA_FREQ field was added that extends the Layer 3 PDU beyond 27 octets. In order to limit the length of the SCHM to 27 octets or less and also preserve backward compatibility with Release 0, any solution to the “Sync Channel Issue” requires that the IS-95B style SCHM be transmitted. However, this would result in the omission of Release-0 and Release-A fields that are needed for the mobile to eventually reach the CDMA Frequency where it is expected to idle and monitor the F-CCCH for page messages (henceforth called F-CCCH Frequency). ... Etc. Many of my fellow Quidiots think its a Motorola is dumb, like Nokia was dumb and Sony was dumb, and they should but Q chips, problem. Motorola is affected but it's more than a Motorola problem. It is a 1xRTT issue, and one that will no doubt only be totally resolved by (God forbid) adapting the standard. - Eric -

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