tailieunhanh - GSM and UMTS (P19)

The Permanent Nucleus in the CEPT Environment Bernard Mallinder 1 ´ During late 1985 the CEPT Groupe Special Mobile (GSM) decided that in the interest of maintaining speed and quality in the development of the technical recommendations, a central support function was required. The mandate for this unit was agreed in early 1986 and the ‘‘Permanent Nucleus’’ (PN) of the GSM was created. The approach and mandate of the unit built on the successful experience that the CEPT had had in the rapid development of specifications for both satellite and ISDN services | GSM and UMTS The Creation of Global Mobile Communication Edited by Friedhelm Hillebrand Copyright 2001 John Wiley Sons Ltd ISBNs 0-470-84322-5 Hardback 0-470-845546 Electronic Chapter 19 Professional Technical Support and its Evolution Section 1 The Permanent Nucleus in the CEPT Environment Bernard Mallinder1 During late 1985 the CEPT Groupe Special Mobile GSM decided that in the interest of maintaining speed and quality in the development of the technical recommendations a central support function was required. The mandate for this unit was agreed in early 1986 and the Permanent Nucleus PN of the GSM was created. The approach and mandate of the unit built on the successful experience that the CEPT had had in the rapid development of specifications for both satellite and ISDN services. The unit was established in Paris during the summer of 1986 and consisted of full-time technical managers and programme managers. The PN had expert full-time resources from France Germany Sweden Norway Finland Holland Switzerland and the UK. The initial tasks involved supporting the working group chairpersons ensuring technical consistency documentation release control consolidation of work-plans and reporting progress to the plenary of GSM. Within a year the role of the PN extended to the creation of the equipment specifications 11 Series and the formulation of the network management recommendations 12 Series . In addition the PN was charged with the co-ordination of the evaluation of the different candidate technologies for the radio interface. These tests were undertaken by CNET in Paris and involved the evaluation of TDMA and CDMA offerings. After the choice for TDMA with slow frequency hopping GSM entered into a review of the complexity of the complete system. Initial work undertaken by Televerket in Sweden indicated that the layer 3 protocol on the air interface resulted in an extensive acquisition time during the initial turn-on period. The Complexity Review commenced during .