Fixed Radio Systems; Point-To-Multipoint Equipment; Point-To-Multipoint Digital Radio Systems in Frequency Bands in the Range 24@25 GHz to 29@5 GHz Using Different Access Methods; Part 3: Time Division Multiple Access (TDMA) Methods (V1.2.1)
Point-to-Multipoint Radio Relay Systems (P-MP) may use different access methods. As some technical parameters are different for the various access methods@ the standard is divided in four parts. A basic description of the different access methods and a comparison among them is provided in TR 101 274 [2]. The present document (Time Division Multiple Access Methods@ TDMA) is to be used in conjunction with Part 1@ describing the basic parameters common to all access methods. The present document specifies the minimum requirements for system parameters of Time Division Multiple Access (TDMA) Point-to-Multipoint (P-MP) Radio Systems in the terrestrial fixed services operating in the band 24@5 GHz to 29@5 GHz (see CEPT Recommendation T/R 13-02 [3]). Only sections specific to TDMA are described in respect to the paragraphs stated in EN 301 213-1 [1]. Time Division Multiple Access (TDMA) is an alternative to FDMA and CDMA covered in other parts of the present document. In TDMA point to Multipoint (P-MP) systems@ a central station broadcasts information to terminal stations in a continuous Time Division Multiplex (TDM) or in a burst TDMA mode. The Terminal stations transmit in TDMA mode. The users may have access to the spectrum by sharing it through time multiplexing. The present version V.1.2.1 mod 1 contains a revision from version V 1.1.1 mod 1in the areas of: - introduction of System types codes for regulatory unique reference to the various system types detailed in the present document@ refer to new annex A (normative) and related categorization into equipment classes of spectral efficiency; - introduction of an additional system type C; - introduction of an additional set of spectrum masks applicable to systems radiating more than one carrier per channel; - introduction of specifications for discrete CW components which exceed the spectrum masks.