ETSI - EN 301 213-1
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 1: Basic Parameters
| Organization: | ETSI |
| Publication Date: | 1 October 2001 |
| Status: | inactive |
| Page Count: | 23 |
scope:
The present document specifies the minimum requirements for
system parameters of Point-to-Multipoint (P-MP) Radio and
Multipoint-to-multip
Multipoint (MP) Radio-Relay Systems use in principle three different access methods, taking into account the basic physical parameters of the frequency, the code and the time. This leads to the three basic access methods of:
- Frequency Division Multiple Access (FDMA);
- Code Division Multiple Access (CDMA);
- Time Division Multiple Access (TDMA).
In addition, in particular for wide-band applications, a multi-carrier transmission implementation may be applied, where each sub-carrier uses one of the above access methodologies.
It should be noted that MP-MP systems differ from P-MP systems in that Terminal Stations may be connected directly to one another in a series of short links and generally act as repeaters for traffic carried on to other stations. The arrangement of links varies over time to accommodate changes in propagation characteristics and changes in the subscriber base.
The MP system in the band 24,5 GHz to 29,5 GHz (ERC/REC T/R 13-02 [i]) will provide access to both public and private networks (PSTN, PDN, etc.) by means of the various standardized network interfaces (e.g. 2-wire loop and ISDN ranging from basic rate to n x 2 Mbit/s as well as local area to wide area data networks interfaces).
The system may be applied to build new access networks by means of a multi cellular architecture, covering urban and suburban areas.
MP systems are generally configured as Pre-Assigned Multiple Access (PAMA) or as Demand Assigned Multiple Access (DAMA) Radio Systems.
The present document covers the following MP applications:
- voice;
- fax;
- voice band data;
- telex;
related to analogue interfaces; and
- 64 kbit/s;
- ISDN;
- digital video;
- digital audio;
- Internet access;
related to digital interfaces;
- further applications like ATM, Frame Relay, LAN, WAN may also be provided.
The equipment covered by EN 301 213 should be designed to be able to meet the network performance requirements foreseen by ITU-R Recommendations F.696-2 [9] and F.697-2 [lo], for medium and local grade portion or ITU-R Recommendation F. 11 89 [i i] for the national portion (access or short haul) of the digital connection following the criteria defiied in ITU-T Recommendation(s) G.821 [12] andor G.826 [13].
The availability requirements are under further study by the relevant bodies.
Network operators may choose different performance and availability requirements in order to extend the possible area of application thus fitting to their network needs.
Radio terminals from different manufacturers are not intended to interwork at radio frequency (i.e. no common air interface).
Regulatory bodies should take into account the inband coexistence between MP systems using differing access methods.
The present document defines the requirements of radio terminal and radio-relay equipment including the interfaces. The requirements for multiplex, network management and antenna/feeder equipment may be addressed elsewhere.
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