E-UTRA

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E-UTRA ( acronym for evolved UMTS Terrestrial Radio Access ) is the air interface for the LTE cellular standard . It was initially published by the standardization organization 3rd Generation Partnership Project (3GPP) under the name Evolved Universal Terrestrial Radio Access (E-UTRA) .

E-UTRA is the continuation of the UMTS specification with extensions and changes in the eNodeB and UE area. The LTE air interface is not backwards compatible with UMTS / HSPA . Using OFDM in the downlink and SC-FDMA in the uplink reduces latencies and increases data rates. The first tests took place in 2008.

properties

E-UTRA has the following properties:

  • Maximum download speeds of 299.6 Mbit / s with 4 × 4 MIMO and 150 Mbit / s with 2 × 2 antenna configuration (20 MHz bandwidth). LTE-Advanced supports up to 8 × 8 MIMO and peak data rates of 2998.6 Mbit / s at 100 MHz bandwidth .
  • Maximum upload speed of 75.4 Mbit / s at 20 MHz (channel) bandwidth, with peak data rates of 1497.8 Mbit / s with LTE Advanced and 100 MHz bandwidth.
  • Lower latencies of less than 5 ms for small data packets and optimal conditions. Shorter latencies for handover and connection establishment
  • Depending on the frequency band, relative speeds between mobile participants and the base station of up to 350 km / h or 500 km / h are supported.
  • Possibility of FDD , TDD and half-duplex FDD.
  • All frequency bands from IMT systems (defined by ITU-R )
  • Flexible bandwidths of 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz and 20 MHz. For comparison: UMTS uses a fixed bandwidth of 5 MHz.
  • The spectral efficiency was improved by a factor of two to five, compared to HSPA release 6.
  • Cell radii of a few meters ( femto cell and pico cell ) up to 100 km macro cell .
  • Simplified core architecture. The network side consists only of enodeBs .
  • Interoperability with older mobile radio standards such as GSM / EDGE , UMTS , CDMA2000 , WiMAX .
  • The network is generally packet-switching and no longer circuit-switching .

architecture

On the network side, E-UTRA only consists of eNodeBs. These play a bigger role than in the UMTS radio access network . An eNodeB combines the technologies of the NodeB and the radio network controller . This simplification reduces the latencies in the entire RAN. The connection to the core takes place via a packet-switching S1 link. eNodeBs can talk to each other via X2.

Calculation of the E-UTRA cell identifier

The cell identifier is used to uniquely identify the cell. It is calculated (in decimal form):

An example: The eNodeB ID is 100, the local cell has the ID 1, which results in the cell identifier:

E-UTRA terminal categories

Since 3GPP Release 8, five LTE device categories are supported. With 3GPP Release 10, which is referred to as LTE-Advanced , three new device categories were introduced and two more with 3GPP Release 11.

Terminal
categories 		Maximum L1 data rate Maximum number of
DL-MIMO data streams 		3GPP
release
downlink uplink
Categories 00 1.0 Mbit / s 1.0 Mbit / s 1 Release 12
Categories 01 10.3 Mbit / s 5.2 Mbit / s 1 Release 08
Categories 02 51.0 Mbit / s 25.5 Mbit / s 2 Release 08
Categories 03 102.0 Mbit / s 51.0 Mbit / s 2 Release 08
Categories 04 150.8 Mbit / s 51.0 Mbit / s 2 Release 08
Categories 05 299.6 Mbit / s 75.4 Mbit / s 4th Release 08
Categories 06 301.5 Mbit / s 51.0 Mbit / s 2 or 4 Release 10
Categories 07 301.5 Mbit / s 102.0 Mbit / s 2 or 4 Release 10
Categories 08 2998.6 Mbit / s 1.497.8 Mbit / s 8th Release 10
Categories 09 452.2 Mbit / s 51.0 Mbit / s 2 or 4 Release 11
Categories 10 452.2 Mbit / s 102.0 Mbit / s 2 or 4 Release 11

Note: The above data rates refer to a channel bandwidth of 20 MHz. If the bandwidth is lower, the L1 data rates also decrease accordingly.

E-UTRA versions (releases)

Like all 3GPP standards, the E-UTRA versions are structured:

  • Release 8, frozen in 2008, first LTE specification
  • Release 9, frozen in 2009, some enhancements on the physical level; Introduction of MIMO beam forming
  • Release 10, frozen in 2011, introduction of some LTE-Advanced options, such as carrier aggregation, uplink SU-MIMO, forwarding via relays and an increase in the L1 peak data rate

All versions are backwards compatible, i. H. Release 8 devices work in Release 10 networks and Release 10 devices can work in Release 8 networks.

E-UTRA tapes

E-UTRA
tape 		Uplink (UL)
BS receive
UE send (MHz) 		Downlink (DL)
BS send
UE receive (MHz) 		Duplex
mode 		Channel
bandwidth
(MHz) 		common names Frequency
band
(MHz) 		Duplex spacing (MHz)
1 1920-1980 2110-2170 FDD 5, 10, 15, 20 IMT 2100 190
2 1850-1910 1930-1990 FDD 1.4, 3, 5, 10, 15, 20 PCS 1900 80
3 1710-1785 1805-1880 FDD 1.4, 3, 5, 10, 15, 20 DCS 1800 95
4th 1710-1755 2110-2155 FDD 1.4, 3, 5, 10, 15, 20 AWS (AWS-1) 1700 400
5 824-849 869-894 FDD 1.4, 3, 5, 10 CLR 850 45
6th 830-840 875-885 FDD 5, 10 UMTS 800 (replaced by Volume 19) 850 45
7th 2500-2570 2620-2690 FDD 5, 10, 15, 20 IMT-E 2600 120
8th 880-915 925-960 FDD 1.4, 3, 5, 10 E- GSM 900 45
9 1749.9 - 1784.9 1844.9 - 1879.9 FDD 5, 10, 15, 20 UMTS 1700 / Japan DCS
(subset of Volume 3) 		1800 95
10 1710-1770 2110-2170 FDD 5, 10, 15, 20 Extended AWS band
(superset of band 4) 		1700 400
11 1427.9 - 1447.9 1475.9 - 1495.9 FDD 5, 10 Lower PDC area 1500 48
12 699-716 729-746 FDD 1.4, 3, 5, 10 Lower SMH blocks A / B / C 700 30th
13 777-787 746-756 FDD 5, 10 Upper SMH block C 700 −31
14th 788-798 758-768 FDD 5, 10 Upper SMH block D 700 −30
15th 1900-1920 2600-2620 FDD 5, 10 Reserved 700
16 2010-2025 2585-2600 FDD 5, 10, 15 Reserved 575
17th 704-716 734-746 FDD 5, 10 Lower SMH blocks B / C
(subset of volume 12) 		700 30th
18th 815-830 860-875 FDD 5, 10, 15 Japan lower 800 band 850 45
19th 830-845 875-890 FDD 5, 10, 15 Japan upper 800 band
(superset of volume 6) 		850 45
20th 832-862 791-821 FDD 5, 10, 15, 20 Digital dividend 800 −41
21st 1447.9 - 1462.9 1495.9-1510.9 FDD 5, 10, 15 Upper PDC band 1500 48
22nd 3410-3490 3510-3590 FDD 5, 10, 15, 20 3500 100
23 2000-2020 2180-2200 FDD 1.4, 3, 5, 10, 15, 20 S-band (AWS-4) 2000 180
24 1626.5 - 1660.5 1525-1559 FDD 5, 10 L-band (US) 1600 −101.5
25th 1850-1915 1930-1995 FDD 1.4, 3, 5, 10, 15, 20 Extended PCS Band
(Superset of Volume 2) 		1900 80
26th 814-849 859-894 FDD 1.4, 3, 5, 10, 15 Extended CLR band
(superset of bands 5, 6, 18 and 19) 		850 45
27 807-824 852-869 FDD 1.4, 3, 5, 10 SMR
(adjacent to Volume 5) 		850 45
28 703-748 758-803 FDD 3, 5, 10, 15, 20 Digital dividend II 700 55
29 N / A 717-728 FDD 3, 5, 10 Lower SMH blocks D / E
(carrier aggregation only with bands 2/4/23/30) 		700 N / A
30th 2305-2315 2350-2360 FDD 5, 10 WCS blocks A / B 2300 45
31 452.5 - 457.5 462.5 - 467.5 FDD 1.4, 3, 5 450 10
32 N / A 1452-1496 FDD 5, 10, 15, 20 L-band
(carrier aggregation only with band 20) 		1500 N / A
unallocated 1915-1920 1995-2000 FDD AWS-2 (EPCS Block H)
(adjacent to Volume 25) 		1900 80
unallocated 1755-1780 2155-2180 FDD AWS-3 (adjacent to band 4) 1700 400
Development tape 1980-2010 2170-2200 FDD MSS (adjacent to Volume 1) 2100 190
33 1900-1920 TDD 5, 10, 15, 20 Pre-IMT
(subset of Volume 39) 		2100
34 2010-2025 TDD 5, 10, 15 IMT 2100
35 1850-1910 TDD 1.4, 3, 5, 10, 15, 20 PCS (uplink) 1900
36 1930-1990 TDD 1.4, 3, 5, 10, 15, 20 PCS (downlink) 1900
37 1910-1930 TDD 5, 10, 15, 20 PCS (duplex spacing) 1900
38 2570-2620 TDD 5, 10, 15, 20 IMT-E (duplex spacing)
(subset of volume 41) 		2600
39 1880-1920 TDD 5, 10, 15, 20 DCS-IMT gap 1900
40 2300-2400 TDD 5, 10, 15, 20 2300
41 2496-2690 TDD 5, 10, 15, 20 BRS / EBS 2500
42 3400-3600 TDD 5, 10, 15, 20 3500
43 3600-3800 TDD 5, 10, 15, 20 3700
44 703-803 TDD 3, 5, 10, 15, 20 APT 700
E-UTRA
tape 		Uplink (UL)
BS receive
UE send (MHz) 		Downlink (DL)
BS send
UE receive (MHz) 		Duplex
mode 		Channel
bandwidth
(MHz) 		common names Frequency
band
(MHz) 		Duplex spacing (MHz)

Web links

Individual evidence

  1. ↑ a b c 3GPP TS 36.306 E-UTRA User Equipment radio access capabilities