System Information (36.331 Rel 15) SIB
Description Downlink channel bandwidth, PHICH MIB config PLMN, TAC, Cell Id, access restrictions, q1 RxLevMin, frequency band, MFBI 1 Bandwidth Reduced, limited channel BR bandwidth of 6 PRBs Common radio resource config, access 2 class barring, MBSFN config 3 Cell re-selection common information Cell re-selection information for intra4 frequency neighbouring cells Cell re-selection information for inter5 frequency neighbouring cells 6 Cell re-selection information for UTRA 7 Cell re-selection information for GERAN Cell re-selection information for 8 CDMA2000 9 Home eNodeB name ETWS (Earthquake and Tsunami Warning 10 System) 11 ETWS CMAS (Commercial Mobile Alert Service) 12 notification MBMS control information associated 13 with one or more MBSFN areas EAB (Extended access class barring) 14 parameters MBMS Service Area Identities (SAI), 15 neighbouring carrier frequencies GPS time and Coordinated Universal Time 16 (UTC) Traffic steering between E-UTRAN and 17 WLAN Sidelink UE information, sidelink direct 18 communication related resource
Comment
SFN Scheduling of other SIBs eMTC (enhanced Machine Type Communications) UL frequency and bandwidth
Black cell list
Primary notification Secondary notification
SIB
19 20 21
Description Sidelink UE information, sidelink direct discovery related resource Control information associated transmission of MBMS using SC-PTM V2X
Comment
Standardized QoS Class Identifier (23.203 Rel 13) Policy and charging control architecture
QCI
Traffic Class
1
Conversational
2
100 ms
Packet error loss rate 10-2
2
Conversational
4
150 ms
10-3
3
Streaming
3
50 ms
10-3
4
Streaming
5
300 ms
10-6
65
0.7
75 ms
10-2
66
2
100 ms
10-2
Packet Priority delay budget
5
Interactive
1
100 ms
10-6
6
Interactive
6
300 ms
10-6
Resource type GBR
Example Services
Conversational Voice Conversational Video GBR (Live Streaming) GBR Real Time Gaming Non-Conversational GBR Video (Buffered Streaming) Mission Critical user plane Push To Talk GBR voice (e.g., MC-PTT) Non-Mission-Critical GBR user plane Push To Talk voice Non-GBR IMS Signalling Video (Buffered Streaming) TCP-based (e.g., www, e-mail, chat, Non-GBR ftp, p2p file sharing, progressive video, etc.)
QCI
Traffic Class
Packet Priority delay budget
Packet error loss rate
Resource type
7
Interactive
7
100 ms
10-3
Non-GBR
8
Interactive
8
300 ms
10-6
Non-GBR
9
Background
9
300 ms
10-6
Non-GBR
69
0.5
60 ms
10-6
Non-GBR
70
5.5
200 ms
10-6
Non-GBR
Example Services Voice, Video (Live Streaming) Interactive Gaming Video (Buffered Streaming) TCP-based (e.g., www, e-mail, chat, ftp, p2p file sharing, progressive video, etc.) Mission Critical delay sensitive signalling (e.g., MC-PTT signalling) Mission Critical Data (e.g. example services are the same as QCI 6/8/9)
GBR
Guaranteed Bitrate Resources QCI
QoS Class Identifier MC-PTT Mission Critical - Push To Talk
Timing Advance Command A device receives a timing advance command from the network and adjusts uplink timing for PUCCH / PUSCH / SRS transmission 36.211 Frame structure
Basic time unit : T s = 1 / (15000 x 2048) seconds Radio frame duration : T f = (150 x 2048) x T s = 307200 x T s = 10 ms NTA = timing offset between uplink and downlink radio frames at the UE, expressed in units of T s 36.321 MAC Timing Advance Command Distance between a device and the network antenna : A timing advance of one Ts is equivalent to a distance of (3 x 108 x 1 / (15000 x 2048)) / 2 = 4.89 m Distance = propagation speed (light speed) x one Ts delay / 2 (downlink path + uplink path) 36.213 Transmission timing adjustments Initial absolute Random Access Response MAC payload (11 bits) T A range = 0, 1, 2,..., 1282
Random Access Response NTA = T A x 16 . Timing adjustment is always positive Example : T A = 1 then NTA = 1 x 16 T s. Distance equals 16 x 4.89 m = 78.12 m Distance maximum between a device and the network antenna = 1282 x 78.12 m = 100.156 km (62.23 mi) Random Access ResponseTA Periodic relative Timing Advance Command MAC Control Element (6 bits) T A range = 0, 1, 2,..., 63
Timing Advance Command NTA,new = NTA,old + (T A - 31) x 16 . Timing adjustment can be negative, null or positive Example : T A = 30 then NTA,new = NTA,old + (30 - 31) x 16 T s = NTA,old - 1 x 16 T s. Distance variation equals -1 x 16 x 4.89 m = - 78.12 m Distance variation maximum = - 31 x 16 x 4.89 m = - 2.42 km or + 32 x 16 x 4.89 m = + 2.5 km (1.55 mi) 36.214 Timing advance (TADV) TAdvType1 = eNB Rx–Tx time difference + UE Rx –Tx time difference TAdvType2 = eNB Rx–Tx time difference eNB Rx–Tx time difference = eNb processing delay UE Rx–Tx time difference = DL propagation delay + UE processing delay + UL propagation delay TAdvType1 = eNb processing delay + (DL+UL) propagation delay + UE processing delay TAdvType2 = eNb processing delay
36.455 LPPa TAdvType1 index range = 0..7690 (36.133 §10.3 value range = 0..49232 Ts) 36.355 LPP ue-RxTxTimeDiff index range = 0..4095 (36.133 §10.3 value range = 0..20472 Ts) 36.455 LPPa TAdvType2 index range = 0..7690 (36.133 §10.3 value range = 0..49232 Ts)
