RF carrier spacing (kHz) 12.5 for 8K10F1E (C4FM) 6.25 for 5K76G1E 25 25 25 12.5-10 6.25 evolution 25/12.5 25 1 250 25, minimum 1 230 (800 MHz) 1 250 (else) Maximum base station e.r.p. (W): – peak – average 500 500 Not specified. Typically 10100 W Not specified Typically 40-300 Not specified 250 25 200 200 Max. 10 W at antenna, with antenna gain below level required by regulation; average: 10 W(3) Not specified. Typically ERP (dBW) = 22 As 1 Peak : 105 (800 MHz band) Typical: 63 (800 MHz band) Peak: 60 (other bands) Typical: 36 (other bands) Nominal mobile station transmit power (W) Peak/average: – mobile – handheld from 10/10 to 110/110 from 1/1 to 5/5 Typically 3/5 to 10/25 Typically 1/2.5 to 1.8/4 –/2 Not specified 10.4/0.5 3.5/0.17 10/10 2/2 10/10-110/110 1/1-6/6 4/1.33(4) 0.6/0.2 0.2 Similar to TETRA 1 0.2-1 Cell radius (km): – handheld/ – suburban – 7.6-35 7.6 35 3.8-17.5 3.8 17.5 Not yet determined Not yet determined 20-40 5-40 (design dependent) 5 40 8-28 8 28 Design dependent Design dependent 7-13  50 Design dependent Maximum cell radius as in TETRA1 Design and deployment dependent Typically: 1.5, Maximum: 100 Area coverage technique Cellular channel reuse Simulcast Voting receivers Cellular channel reuse Quasi synchronous (Simulcast) Time-sharing transmission Diversity receivers Cellular channel reuse Diversity receivers (base) Cellular channel reuse Diversity receivers Cellular channel reuse Simulcast Diversity receiver (Time-sharing transmission) Cellular channel reuse Simulcast Voting receivers Diversity receivers Cellular channel and sectorization(5) Diversity receivers, time synchronous Cellular channel reuse of 1 and sectorization Diversity receivers Cellular channel reuse and sectorization Diversity receivers (base station) Cellular channel of 1and sectorization Diversity receivers
TABLE 1 Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL EDACS FHMA CDMA-PAMR TETRA enhanced data service GoTa Access method FDMA TDMA in development TDMA TDMA TDMA FDMA FDMA FHMA (TDMA/FHM) CDMA modulation (MCM) TDMA CDMA Traffic channels/RF carrier: – initial – design capability Integrated voice and data modes FDMA: 1 TDMA: 2 @ 12.5 kHz TDMA: 4 @ 25 kHz FDMA: 1 TDMA: 2 or 4 4 6 6. 3, 12 6 6, 4, 3, 8, 12, etc. 1 1 1 1 3 Not specified See specifications and published standards As in TETRA1 See specifications and published standards 61 253 Transmission rate (kbit/s) Integrated voice and data modes FDMA: 9.6 TDMA 2-slot: TBD, ranging from 9.6-12 TDMA 4-slot: TBD, ranging from 22-24 700 MHz data only modes 50 kHz: 76.8-230.4 kbit/s 100 kHz: 153.6-460.8 kbit/s 150 kHz: 230.4-691.2 kbit/s 36 64 64 8 9.6 36.9 cdma2000-1x: 9.6 or 14.4 Support up to 1.8 Mbit/s uplink and 3.1 Mbit/s downlink cdma2000 HRPD: Support up to 1.8 Mbit/s per 1.25 MHz channel uplink and 4.9 Mbit/s per 1.25 MHz channel downlink 690 Maximum 9.6~153.6 Support up to 1.8 Mbit/s on the reverse link and up to 4.9 Mbit/s on the forward link
TABLE 1 Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL FHMA CDMA-PAMR enhanced data service GoTa Traffic channel structure (continued): – Alternative rate speech codec: – Bit rate (kbit/s) – Error protection – Coding algorithm – Circuit mode data (kbit/s) – Protected – – Packet mode data N/A 6.1 9.6 IP – Internet protocol Rate tbd Up to 19.2 Up to 28.8 IP (Internet Protocol) N/A Up to 4.8/slot 7.467/slot (option) connectionless 8.0 6.7 VSELP (3:1) 7.2 None connectionless Supports IP and other network protocols Half rate codec tbd 4.8 7.2 Yes N/A N/A IP – Internet protocol Defined 4.8 9.6 connectionless oriented, standard TCP/IP N/A As in TETRA1 14.4,7.2,3.6,1.8 CRC Messaging X.400 Yes Yes Control channel structure (number of channel types): – Common control channel – Associated control channel – Broadcast control channel 2 3 2 2 3 2 1 2 1 (Option: 5) – Slot information channel: 1 – Primary control channel: 3 – Temporary control channel: 1 – Dedicated control channel: 1 – Associated control channel: 1 5 2 1 1 1 1 5 1 TDMA slot downlink control, 3 slot uplink access Slow associated, 450 bit/s; fast associated cycle stealing Provided See specifications As in TETRA1 As in TETRA1 As in TETRA1 See specifications 3 (for Common control channels) 1-7 (for Associated control channels) 1-7 (for Broadcast control channels) Q oriented,
TABLE 1 Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL EDACS FHMA CDMA-PAMR enhanced data service GoTa spread equalization capability (s)(6) A – 50 Class – 50 Class A – no equalization Class B – 55.5 Class Q – 111.1 Class A – no equalization Class B – no equalization Class Q – N/A Class A – 39.8 without equalizer Class B – 65.5 without equalizer Class Q – N/A No equalization needed Class A – 52 Class Q – 52 Class A – no equalization Class B – no equalization Class Q – no equalization See specifications Use of channels eliminates the need for equalization in QAM channels. PSK channels same as TETRA1 See specifications Channel coding Integrated voice and data for FDMA. BCH code for network ID. Trellis codes for data. Golay & Hamming codes for voice. Reed-Solomon codes for embedded signals. Integrated voice and data for TDMA. TBD for network ID. TBD for data. TBD codes for voice. TBD codes for embedded signals Convolutional with interleaving plus error detection Multirate trellis coding with interleaving plus detection and bit Prioritization/ convolutional codes with interleaving plus error detection Multirate trellis coding with interleaving plus error detection and bit prioritization Convolutional codes with interleaving plus error detection Control BCH/repeat. Digital voice custom with repeat. Data repeat Variable rate convolutional with long interleaving, selective priority protection for encoded voice bits, partial repetition, and channel state enhanced Viterbi algorithm; error detection (cyclic redundancy check (CRC)) Convolutional with interleaving. Turbo codes PCCC codes for the payload. Partitioned block codes for the header Convolution codes and Turbo codes with interleaving. TABLE 1 Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL EDACS FHMA CDMA-PAMR TETRA enhanced data service GoTa
Encipherment – security levels – – multikey – encipherment control – over the air rekeying 1, 2, 3 and 4 Yes Yes Yes Yes Air interface is exportable plus authentification. Plus end-to-end encryption user definable up to the highest level of security Yes Yes Yes Yes Not specified Allowed for Yes Yes Yes Yes Yes Type 1, 3, 4 Yes Yes No Yes Not specified, designed on a “provisions for” concept Yes See specifications As in TETRA1 Yes Yes Yes Yes Yes Handover Yes Yes Option Yes Yes Yes Yes Hand-off (Yes) Yes Yes Intersystem roaming capability Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Design capability for multiple operators (systems) in same area Yes Yes Yes Yes Yes Yes Allowed for Yes Yes Yes Direct mode Channel scan(7). Repeater. Trunking node gateway Dual watch(8). Repeater. Trunking mode gateway Not yet determined Allowed for Dual watch gateway Portable-mobile. Mobile-mobile. Mobile-base Not determined Yes As in TETRA1 since TEDS is integrated with TETRA1 Yes (Design dependent) 1 Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL EDACS FHMA CDMA-PAMR TETRA enhanced data service GoTa Repeater mode Yes Yes Yes Yes Yes As in TETRA1 Yes (Design dependent) mobile.
Appendix 2 to Annex 1 General description of the Project 25 system 1 Services supported Services will be available on Project 25 systems in accordance with system type and other specifications within this Appendix. Where a service is mandatory for a Project 25 system type, such a system must provide that service. Where a service is a standard option, and a Project 25 system provides that service, it shall be provided in compliance to the standard. Technological limitations may preclude some systems from supporting certain services. 1.1 Types of systems Two types of systems are defined: non-trunked (conventional) and trunked. All Project 25 trunked radios shall be capable of operation in both types of systems. 1.1.1 Non-trunked (conventional) Non-trunked (conventional) systems possess no centralized management of subscriber operation or capability. All aspects of system operation are control of the system users. Operating modes within non-trunked systems include both direct (i.e. radio-to-radio) and repeated (i.e. through an RF repeater) operation. 1.1.2 Trunked Trunked systems provide for management of virtually all aspects of radio system operation, including channel access and call routing. Most aspects of system operation are under automatic control, relieving system users of the need to directly control the operation of system elements. 1.2 Availability The following table of telecommunication services (Table 2) shows service availability by system type. The services are further denoted as either mandatory or as a standard option, by system type. TABLE 2 Telecommunication services Bearer services Non-trunked Trunked Circuit switched unreliable data Standard option Standard option Circuit switched reliable data Standard option Standard option Packet switched confirmed delivery data Standard option Standard option Packet switched unconfirmed delivery data Standard option Standard option Teleservices Non-trunked Trunked Broadcast voice call Not available Mandatory Unaddressed voice call Mandatory Not available voice call Standard option Mandatory Individual voice call Standard option Mandatory Circuit switched data network access Standard option Standard option
The link adaptation algorithms will adjust the bit rate to adapt the packet data throughput to the distance from the base station and the prevailing propagation conditions at different locations in the cell. 3.1.8 TEDS throughput Not all combinations of channel bandwidth, modulation type and coding rate are permitted in TEDS channels. The combinations have been limited to those shown in the second column of Table 5. This table also provides an estimate of the throughput, after allowance is made for the pilot symbols, channel coding and lower layer protocol headers and functions. These are technically the “TL-SDU” bit rates, but are close to the true bit rates available to user IP packets in good channel conditions. TABLE 5 Permissible modulation type/coding rate pair and expected throughput in each channel bandwidth Channel width Modulation type and coding rate TEDS channel throughput (kbit/s) 25 kHz /4-DQPSK r = 2/3 14.8 r = 2/3 24.3 4-QAM r = ½ 11 16-QAM r = ½ 22 64-QAM r = ½ 33 64-QAM r = 2/3 44 64-QAM r = 1 66 50 kHz 4-QAM r = ½ 27 16-QAM r = ½ 54 64-QAM r = ½ 80 64-QAM r = 2/3 107 64-QAM r = 1 160 100 kHz 4-QAM r = ½ 58 16-QAM r = ½ 116 64-QAM r = ½ 175 64-QAM r = 2/3 233 64-QAM r = 1 349 150 kHz 4-QAM r = ½ 90 16-QAM r = ½ 179 64-QAM r = ½ 269 64-QAM r = 2/3 359 64-QAM r = 1 538 3.2 TEDS higher protocol layers Figure 30 shows the TEDS air interface protocol stack and its relation to IP applications. Note that TEDS services are IP based. TETRA voice channels and circuit mode data (at speeds up to 28.8 kbit/s) are only available in an integrated TETRA1 part. These services share the enhanced MAC layer of Fig. 30. For ease of compatibility TEDS uses the same control channel as the existing TETRA standard. The details of the TEDS standard are in [ETSI].