To: Clarksterh who wrote (19428 ) 12/9/1998 1:43:00 PM From: DaveMG Read Replies (2) | Respond to of 152472
Clark, After looking again at Q's White Paper:Message 6207324 From my lay perspective it looks like convergence needs to take place at the air interface level so that the handsets are compatible and then again where wireless meets the "core" networks. "Principle # 2 - Existing cdmaOne service and signaling for ANSI-41 must be accommodated, allowing for phones both with and without SIM cards In accordance with the International Telecommunications Union's (ITU) "Family of Systems" concept, QUALCOMM believes that any true third generation standard must support both existing cdmaOne services (supported through ANSI-41) and GSM services (supported through the GSM MAP protocol) without 'interworking' (i.e., without dependence on switch-external 'hardware and software box' implementations that inadequately adapt services of cdmaOne systems to services of GSM and vice-versa). Dependence on interworking removes the responsibility of accommodating existing services of either system from the Mobile Switching Center (MSC) of the other. Current experience with such interworking implementations has generally not been positive. For the support of cdmaOne services, this would include the IS-127 (EVRC) speech codec, IS-733 (13 kbps) speech codec, IS-707 data services, IS-637 short messaging, and IS-683 over-the-air service provisioning. Appropriate air interface signaling to support ANSI-41 features and services must be efficiently supported. The ITU has defined a User Identity Module (UIM) function that is associated with subscriber information and authentication in the network. The need for UIM support is a functional requirement and is not tied to a specific physical implementation of the function. The UIM function should be allowed to be implemented with or without Subscriber Identity Module (SIM) cards, also known as 'chip cards.' SIM cards have been predominantly used by GSM systems. Elsewhere, non-card based methods for subscriber management are widely in use, and new methods continue to be developed for future implementation. Neither of the two physical approaches, card-based or non-card based, should be mandated in the converged standard to the exclusion of the other. The operator should have the flexibility to choose and third generation systems should accommodate both. Conclusion: QUALCOMM understands and fully accepts that GSM operators and manufacturers require compatibility with GSM services and GSM-MAP in the same way that cdmaOne operators and manufacturers require compatibility with cdmaOne services and ANSI-41. QUALCOMM believes that third generation standards should support both cdmaOne and GSM services and networks equally. QUALCOMM also supports the evolutionary development of new services and the convergence of cdmaOne and GSM services and networks, and recognizes that most high burst rate traffic will be destined for the Internet using internationally accepted Internet protocols." I would hazard a guess that Q's desire to avoid "'interworking' (i.e., without dependence on switch-external 'hardware and software box' implementations that inadequately adapt services of cdmaOne systems to services of GSM and vice-versa)" might cost GSM carriers some extra dough... Dave