bsspar 1 radio resource admin
DESCRIPTION
NSN Parameter for RRTRANSCRIPT
BSSPAR: Chapter 1Radio Resource Administration
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TDMA frameTDMA frame33
4455
7766
0011
2233
4455
Physical channel Physical channel e.g. allocated to onee.g. allocated to one
subscriber with FR voicesubscriber with FR voiceand and no frequency hoppingno frequency hopping
Basic TDMA Structure
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= 8 timeslots= 8 timeslots
(( 0.577ms * 8 = 4.615 ms)0.577ms * 8 = 4.615 ms)
0011
3344
55
7766
0011
2233
200 kHz200 kHzfrequencyfrequency
TDMA frameTDMA frame22
22 22 22
00 20472047
00 11 22 4848 4949 5050
2048 super frames = 2048 super frames = hyper framehyper frame
Super frameSuper frame = 26 x (51 multi frame)= 26 x (51 multi frame)
TDMA frame TDMA frame numberingnumbering
Multi, Super & Hyper Frames
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00 11 22 4949 505000 11 22 2424 2525
00 11 22 4848 4949 505000 11 2424 2525
00 77
Super frameSuper frame = 26 x (51 multi frame)= 26 x (51 multi frame)or 51 x (26 multi frame)or 51 x (26 multi frame)
26 multi frame26 multi frame = 120 ms= 120 ms 51 multi frame 51 multi frame = 235 ms= 235 ms
TDMA frame TDMA frame = 4.615 ms= 4.615 ms
00 11 22 4949 5050
(Traffic and associated signalling)(Traffic and associated signalling) (Signalling and Control channels)(Signalling and Control channels)
Logical ChannelsLogical Channelsfor transport of specific contentfor transport of specific content
GSM Channel Organization
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Base StationBase StationSubsystemSubsystem
Physical ChannelsPhysical Channelstransport mediumtransport medium
MSMS
mappingmapping
Physical channel parametersPhysical channel parametersARFCNARFCN
Time slot numberTime slot numberFrequency hopping algorithmFrequency hopping algorithm
SCHSCH
FCCHFCCH
PCHPCH
BCCHBCCH
AGCHAGCH
RACHRACH
Frequency Correction ChannelFrequency Correction Channel
Synchronisation ChannelSynchronisation Channel
Broadcast Control ChannelBroadcast Control Channel
Paging ChannelPaging ChannelPaging ChannelPaging Channel
Random Access ChannelRandom Access Channel
Access Grant ChannelAccess Grant Channel
BCHBCH
CCCHCCCH
DLDL
DLDL
DLDL
ULUL
CommonCommonChannelsChannels
CBCHCBCH Cell Broadcast ChannelCell Broadcast Channel
Logical Channels
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AGCHAGCH
SDCCHSDCCH
SACCHSACCH
FACCHFACCH
Stand alone Dedicated Control ChannelStand alone Dedicated Control Channel
Slow Associated Control ChannelSlow Associated Control Channel
Fast Associated Control ChannelFast Associated Control Channel
Access Grant ChannelAccess Grant Channel
DCCHDCCH
TCHTCH
DedicatedDedicatedChannelsChannels
UL/DLUL/DL
UL/DLUL/DL
FR/HRFR/HR Full rate / Halft rate TCHFull rate / Halft rate TCH
EFREFR Enhanced Full rate TCHEnhanced Full rate TCH
AMR FR/HRAMR FR/HR Adaptive multirate TCH (FR/HR)Adaptive multirate TCH (FR/HR)
26 TDMA frames = 120 ms26 TDMA frames = 120 ms
11 2626
tt tt tttt tt tt tt fftt tttt tt tt tttt tt tt tttt fftt tt tt ttttttss ii
Full Rate Traffic Channel Configuration (UL & DL)Full Rate Traffic Channel Configuration (UL & DL)
Traffic Channel Mapping
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......
11 2626
Half Rate Traffic Channel Configuration (UL & DL)Half Rate Traffic Channel Configuration (UL & DL)
26 TDMA frames = 120 ms26 TDMA frames = 120 ms
11 2626
tt
TT TT
tt tt
TT
ttff
tt tt
TT TT TT TT
tt tt
TT
tt
TTff
TT
tt
TT
tttt
TT
ss
SS
tt = full rate TCH, = full rate TCH, ss = SACCH= SACCH/T/T, , ii = idle TDMA frame= idle TDMA frame
tt = half rate TCH, = half rate TCH, ss = SACCH= SACCH/T/T (first user)(first user)TT = half rate TCH, = half rate TCH, SS = SACCH= SACCH/T/T (second user) TDMA frame(second user) TDMA frame
Signaling Channel Mapping Combined Configuration: (BCCH + SDCCH/4+ CCCH/3)
Time Slot 0Time Slot 0DownlinkDownlink 51 TDMA frames = 235 ms51 TDMA frames = 235 ms
ff ss bbbb bbbbcc ffcc ffcc sscccc cccc cccc cccc ffcc ffss tt tt tt tt tttt tt tt ff fftt tt tt tt tttt tt tt ffss ffssss ssss ssss sss s ss
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tt tt tttt rr rr ss ffss ssss ssssss rr rr rrrr rr rr rrss ffrr rr rr rr rr rrrr rr rr rr ffrr rr rr rr ttrr tt tt ttrr fftt tt tt rr ttrr tt tttt
UplinkUplink
tt
00 5050
1.1. 2.2. 3.3. 4.4.
CHANNELS f = FCCH b = BCCH r = RACH CHANNELS f = FCCH b = BCCH r = RACH
s = SCH/SACCH c = CCCH t = SDCCH/4s = SCH/SACCH c = CCCH t = SDCCH/4
Signaling Channel Mapping Separated Channel Configuration: (BCCH +CCCH/9)
Time Slot 0Time Slot 0
ff ss bbbb bbbb cc ffcc ffcc ss cc cc cc cc cccc cc cc ffcc ffss cc cc cc cc cccc cc cc ff ffcc cc cc cc cccc cc cc ffss ffcc cc cc cc cccc cc ccss
DownlinkDownlink 51 TDMA frames = 235ms51 TDMA frames = 235ms
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CHANNELS f = FCCH b = BCCH r = RACH CHANNELS f = FCCH b = BCCH r = RACH
s = SCH/SACCH c = CCCH t = SDCCH/4s = SCH/SACCH c = CCCH t = SDCCH/4
rr rr rrrr rr rr rr ffrr rrrr rr rr rr rr rr rrrr rr rr rrrr ffrr rr rr rr rr rrrr rr rr rr ffrr rr rr rr rrrr rr rr rrrr ffrr rr rr rr rrrr rr rrrr
UplinkUplink
rr
tt tt tttt tt tt tt fftt tttt tt tt tt tt tt tttt tt tt tttt fftt tt tt tt tt tttt tt tt tt ffssss ssss ssss ss ssss ffssss ssssssss
DownlinkDownlink
tt
51 TDMA frames = 235 ms51 TDMA frames = 235 ms
ss
Other than Time Other than Time Slot Slot 00
Signaling Channel Mapping Separated/Hybrid Channel Configuration: (SDCCH/8 +SACCH/4)
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CHANNELS t = SDCCH/8 s = SACCH/8CHANNELS t = SDCCH/8 s = SACCH/8
ssss ssss ssssss ffss ssss ss tt tttt tt tt ttss fftt tt tt tt tt tttt tt tt tt fftt tt tt tt tttt tt tt tttt fftt tt tt tt tttt tt tttt
UplinkUplink
tt
1.1. 2.2. 3.3. 5.5. 6.6. 7.7. 8.8.4.4.
Signaling Channel MappingComparison of number of CCCH Blocks : Separated and Combined Configuration
Separated BCCH/CCCH and SDCCHSeparated BCCH/CCCH and SDCCH51 TDMA frames = 235 ms51 TDMA frames = 235 ms
11 22 33 44 55 66 77 88 99
ff ss bbbb bbbb cc ffcc ffcc ss cc cc cc cc cccc cc cc ffcc ffss cc cc cc cc cccc cc cc ff ffcc cc cc cc cccc cc cc ffss ffcc cc cc cc cccc cc ccss
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f = FCCHf = FCCH b b = BCCH= BCCH t = SDCCHt = SDCCHii=idle=idle
s = SCH/SACCHs = SCH/SACCH c = CCCH = PCH/AGCHc = CCCH = PCH/AGCH
11 22 33Combined BCCH/CCCH/SDCCHCombined BCCH/CCCH/SDCCH
ff ss bbbb bbbbcc ffcc ffcc sscccc cccc cccc cccc ffcc ffss tt tt tt tt tttt tt tt ff fftt tt tt tt tttt tt tt ffss ffssss ssss ssss ss ssss
Channel configuration defined by parameter channel TypeChannel configuration defined by parameter channel Type
TCHF (0)TCHF (0) = full rate traffic channel= full rate traffic channelTCHH (1)TCHH (1) = half rate traffic channel (Note OSC = half rate traffic channel (Note OSC ––double HR)double HR)TCHD (2)TCHD (2) = dual rate traffic channel= dual rate traffic channelSDCCH (3)SDCCH (3) = standalone (SDCCH/8)= standalone (SDCCH/8)MBCCHMBCCH (4)(4) = broadcast control channel= broadcast control channel
Channel MappingParameter Setting
MO Class TR/RTSLMO Class TR/RTSLParameter Parameter channelxTypechannelxType ((CHxCHx) where x = 0…7) where x = 0…7
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MBCCHMBCCH (4)(4) = broadcast control channel= broadcast control channelMBCCHC (5)MBCCHC (5) = = BCCH + SDCCH/4BCCH + SDCCH/4MBCCBMBCCB (7)(7) = = BCCH + SDCCH/3 with CBCHBCCH + SDCCH/3 with CBCHSDCCBSDCCB (8)(8) = SDCCH/7 with CBCH= SDCCH/7 with CBCHNOTUSED (9)NOTUSED (9) = timeslot has no radio definition or = timeslot has no radio definition or AbisAbis allocationallocationERACHERACH (10)(10) = random access channel of extended area= random access channel of extended areaEGTCH (14)EGTCH (14) = EGPRS packed data traffic channel for extended area= EGPRS packed data traffic channel for extended areaLRTCH (15) LRTCH (15) = long reach traffic channel= long reach traffic channel
Note: Note: •• Some values not allowed in certain Some values not allowed in certain tsltsl (e.g. TSL0 can’t (e.g. TSL0 can’t
have value 8)have value 8)•• PBCCH is not supported in S13 and onwardsPBCCH is not supported in S13 and onwards
When static SDCCHs overbooked When static SDCCHs overbooked �������� Free TCHs used for SDCCH trafficFree TCHs used for SDCCH traffic
Rules for dynamic SDCCH allocation:Rules for dynamic SDCCH allocation:
•• SDCCH is configured to TRX with least number of SDCCHs or no SDCCHs yet at allSDCCH is configured to TRX with least number of SDCCHs or no SDCCHs yet at all•• SDCCH is configured to TRX with least number of occupied channelsSDCCH is configured to TRX with least number of occupied channels
•• If between different types of TCHs must be selected, the preference order is: HR, FR, DR If between different types of TCHs must be selected, the preference order is: HR, FR, DR TCHTCH
•• DFCA: SDCCH and Dynamic SDCCH not supported on DFCA TRXs (only on regular TRX)DFCA: SDCCH and Dynamic SDCCH not supported on DFCA TRXs (only on regular TRX)
Dynamic SDCCH Allocation
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Exceptions:Exceptions:
•• Configuration of any dynamic SDCCH resource in the BTS not possibleConfiguration of any dynamic SDCCH resource in the BTS not possible•• Only one TCH of the BTS is availableOnly one TCH of the BTS is available
Dynamic SDCCH allocation + FACCH call set up enable d simultaneouslyDynamic SDCCH allocation + FACCH call set up enable d simultaneously�������� dynamic SDCCH allocation has higher prioritydynamic SDCCH allocation has higher priority
Alternative to dynamic SDCCH allocation (for call s etup case)Alternative to dynamic SDCCH allocation (for call s etup case)
•• Assignment of TCH to MS from CCCH instead of SDCCHAssignment of TCH to MS from CCCH instead of SDCCH•• Call set up on FACCH instead on SDCCHCall set up on FACCH instead on SDCCH
Parameters (SEG Level)Parameters (SEG Level)
newEstabCausesSupport (NECI)newEstabCausesSupport (NECI) Y/NY/N Enables feature is generalEnables feature is general
FACCH Call Set Up
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Parameters (BSC level)Parameters (BSC level)
ordinaryCallOnFacch (EOF)ordinaryCallOnFacch (EOF) Y/NY/N Enables ordinary call set up on FACCHEnables ordinary call set up on FACCHemerCallOnFacch (EEF)emerCallOnFacch (EEF) Y/NY/N Enables emergency call set up on FACCHEnables emergency call set up on FACCHreestablishOnFacch (ERF)reestablishOnFacch (ERF) Y/NY/N Enables call reestablishment on FACCHEnables call reestablishment on FACCH
pagingAnsOnFacch (EPF)pagingAnsOnFacch (EPF) Y/NY/N Enables answer to paging call setup on FACCHEnables answer to paging call setup on FACCH
Example - Signaling capacity
Chs 1% 2% 3% 5%
1 0.01 0.02 0.03 0.05
2 0.15 0.22 0.28 0.38
3 0.46 0.60 0.72 0.90
4 0.87 1.09 1.26 1.52
5 1.36 1.66 1.88 2.22
6 1.91 2.28 2.54 2.96
7 2.50 2.94 3.25 3.75
8 3.13 3.63 3.99 4.54
9 3.78 4.34 4.75 5.37
10 4.46 5.08 5.53 6.22
11 5.16 5.84 6.33 7.08
12 5.88 6.61 7.14 7.95
13 6.61 7.40 7.97 8.83
14 7.35 8.20 8.80 9.73
15 8.11 9.01 9.65 10.60
Traffic profileTraffic profileCall establishmentCall establishmentnumber of cellsnumber of cells 100100number of subscribernumber of subscriber 5000050000authentication and ciphering (sec)authentication and ciphering (sec) 77
subs/cell subs/cell 500500authentication and ciphering sec => Erlauthentication and ciphering sec => Erl 0.0019440.001944SDCCH traffic (Erl/cell)SDCCH traffic (Erl/cell) 0.9722220.972222
SMSSMSSMS/ subs/hourSMS/ subs/hour 55MHT for SMS (sec)MHT for SMS (sec) 66
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13 SDCCH channels needed13 SDCCH channels needed
=>BCCH + SDCCH/8 (not combined)=>BCCH + SDCCH/8 (not combined)
=>BCCH + 2 SDCCH=>BCCH + 2 SDCCH
7.35 8.20 8.80 9.73
15 8.11 9.01 9.65 10.60
16 8.88 9.83 10.50 11.50
17 9.65 10.70 11.40 12.50
18 10.40 11.50 12.20 13.40
19 11.20 12.30 13.10 14.30
20 12.00 13.20 14.00 15.20
MHT for SMS (sec)MHT for SMS (sec) 66SMS traffic (sec => Erl)SMS traffic (sec => Erl) 0.0016670.001667SDCCH traffic (Erl/cell)SDCCH traffic (Erl/cell) 4.1666674.166667
Location updateLocation updateLU / CallLU / Call 11authentication and ciphering (sec)authentication and ciphering (sec) 77authentication and ciphering sec => Erlauthentication and ciphering sec => Erl 0.0019440.001944SDCCH traffic (Erl/cell)SDCCH traffic (Erl/cell) 0.9722220.972222
Total SDCCHTotal SDCCH 6.1111116.111111Check from Erlang B Tabl, Check from Erlang B Tabl,
Chs 1% 2% 3% 5% Chs 1% 2% 3% 5%1 0.01 0.02 0.03 0.05 21 12.80 14.00 14.90 16.20
2 0.15 0.22 0.28 0.38 22 13.70 14.90 15.80 17.10
3 0.46 0.60 0.72 0.90 23 14.50 15.80 16.70 18.10
4 0.87 1.09 1.26 1.52 24 15.30 16.60 17.60 19.00
5 1.36 1.66 1.88 2.22 25 16.10 17.50 18.50 20.00
6 1.91 2.28 2.54 2.96 26 17.00 18.40 19.40 20.90
7 2.50 2.94 3.25 3.75 27 17.80 19.30 20.30 21.90
8 3.13 3.63 3.99 4.54 28 18.60 20.20 21.20 22.90
9 3.78 4.34 4.75 5.37 29 19.50 21.00 22.10 23.80
Erlang B TableFor reference in upcoming calculations
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9 3.78 4.34 4.75 5.37 29 19.50 21.00 22.10 23.80
10 4.46 5.08 5.53 6.22 30 20.30 21.90 23.10 24.80
11 5.16 5.84 6.33 7.08 31 21.20 22.80 24.00 25.80
12 5.88 6.61 7.14 7.95 32 22.00 23.70 24.90 26.70
13 6.61 7.40 7.97 8.83 33 22.90 24.60 25.80 27.70
14 7.35 8.20 8.80 9.73 34 23.80 25.50 26.80 28.70
15 8.11 9.01 9.65 10.60 35 24.60 26.40 27.70 29.70
16 8.88 9.83 10.50 11.50 36 25.50 27.30 28.60 30.70
17 9.65 10.70 11.40 12.50 37 26.40 28.30 29.60 31.60
18 10.40 11.50 12.20 13.40 38 27.30 29.20 30.50 32.60
19 11.20 12.30 13.10 14.30 39 28.10 30.10 31.50 33.60
20 12.00 13.20 14.00 15.20 40 29.00 31.00 32.40 34.60
Combined CCCH / SDCCH configuration
noOfBlocksForAccessGrant = 1 ���� 2 CCCH blocks for PCH
3 MSs paged per paging message ���� 3 pages per block2 blocks per multi frame ���� 3 * 2 = 6 pages per multiframe
BTSBTS 3 MS 3 MS
Paging_RequestPaging_Request
BTSBTS 3 MS3 MS
Paging CapacityExample
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Number of pages per hour ���� 3600 s / 0.235 s * 6 = 91915
Avg of 2 pages required per MS ���� 91915 / 2 = 45957 MSs per hour
BTSBTS 3 MS3 MS
Paging_RequestPaging_Request
Cell with 325 subscribers1 call per subscriber once in a hour1 location update (LU) per subscriber once in 2 hou rs
Duration of call assignment = 4 s ���� 4 s / 3600 s = 1.11 mErl on SDCCH per subscriber325 subscribers ���� 325 * 1.11 mErl = 0.3607 Erl on SDCCH
SDCCH Signalling CapacityExample with call Establishment & Location Update
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Reservation time for LU = 5s ���� 5 s / 7200 s = 0.69 mErl on SDCCH per subscriber325 subscribers ���� 0.2242 Erl on SDCCH
Total SDCCH traffic ���� 0.3607 Erl + 0.2242 Erl = 0.5849 ErlBlocking probability = 1% ���� 4 SDCCHs required ���� SDCCH combined with
CCCH can be used (MBCCHC)
Same cell with 325 subscribersAdditional SMS traffic of 1 mErl per subscriber
325 subscribers ���� 325 * 1 mErl = 0.325 Erl on SDCCH
Total SDCCH traffic ���� 0.5849 + 0.325 Erl = 0.9099 Erl
SDCCH Signalling CapacityExample including SMS
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Blocking probability = 1% ���� 5 SDCCHs required ���� not combined with CCCH (MBCCH)
Base Station Identity Code BSIC = Network Colour Co de NCC + Base Station Colour Code BCCBase Station Identity Code BSIC = Network Colour Co de NCC + Base Station Colour Code BCC
bsIdentityCodebsIdentityCode Setting of BSIC Setting of BSIC
NCCNCC 0..7, distinguishes between PLMNs0..7, distinguishes between PLMNsBCCBCC 0..7, distinguishes between clusters0..7, distinguishes between clusters
BSIC + frequency channel BSIC + frequency channel �������� unique identity of adjacent cellunique identity of adjacent cell
Base Station Identity CodeBase Station Identity Code
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f1f1f2f2
f3f3
f1f1
f1f1
bcc = 1bcc = 1
bcc = 2bcc = 2
bcc = 3bcc = 3
Frequency to be used by TRX (must be unique within a BTS)Frequency to be used by TRX (must be unique within a BTS)
initialFrequencyinitialFrequency (FREQ)(FREQ) 1…10231…1023 Setting of ARFCNsSetting of ARFCNs
GSM 800: GSM 800: 128 .. 251 128 .. 251 GSM 900: GSM 900: 1..124 and 975..1023, 0 1..124 and 975..1023, 0 GSM 1800: GSM 1800: 512..885 512..885 GSM 1900: GSM 1900: 512..810512..810
f2f2
Frequency ReuseFrequency Reuse
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f1f1f2f2
f3f3f4f4
f5f5f6f6
f7f7
f1f1f2f2
f3f3f4f4
f5f5f6f6
f7f7
f1f1f2f2
f3f3f4f4
f5f5f6f6
f7f7
Idle mode Idle mode �������� MS listens on BCCHMS listens on BCCH
idleStateBCCHAllocationidleStateBCCHAllocation (IDLE)(IDLE) 0,1…20000,1…2000 0 = MS gets frequency information from0 = MS gets frequency information fromadjacent cells defined for the BTSadjacent cells defined for the BTS1..2000 = MS gets frequency information from1..2000 = MS gets frequency information fromthe defined BCCH allocation listthe defined BCCH allocation list
Dedicated mode Dedicated mode �������� MS listens on SACCHMS listens on SACCH
Frequency Information for MSFrequency Information for MS
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Defining BA listDefining BA list
bCCHAllocationListbCCHAllocationList IDID 1…20001…2000 Indicates ARFCN values given by BCCHIndicates ARFCN values given by BCCHallocation listallocation list
frequencyBandinUsefrequencyBandinUse 800, 900, 1800, 1900, Multi800, 900, 1800, 1900, Multi
FrequencyFrequency list of ARFCN in the BALlist of ARFCN in the BAL
measurementBCCHAllocationmeasurementBCCHAllocation (ACT)(ACT) ADJ = ADJ = MS gets frequency information fromMS gets frequency information fromadjacent cells defined for the BTSadjacent cells defined for the BTSIDLE = active MS uses same BCCH freq list IDLE = active MS uses same BCCH freq list as as idle MSidle MS
Frequency hopping techniquesFrequency hopping techniques
hoppingModehoppingMode (HOP)(HOP) BB,RF,NBB,RF,NBB = base band hopping (1)BB = base band hopping (1)RF = RF hopping (2)RF = RF hopping (2)N = no frequency hopping at all (0)N = no frequency hopping at all (0)
Principle of Frequency Hopping
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FrequencyFrequency
TimeTime
FF11
FF22
FF33
Call is transmitted through several frequencies toCall is transmitted through several frequencies to•• average the interference (interference diversity)average the interference (interference diversity)•• minimise the impact of fading (frequency diversity)minimise the impact of fading (frequency diversity)
TRXs do not hopTRXs do not hopPhysical channels moved from one TRX to anotherPhysical channels moved from one TRX to another
Hopping sequenceHopping sequencehoppingSequenceNumber (HSN)hoppingSequenceNumber (HSN) 0..630..63
0 = cyclic hopping0 = cyclic hopping1..63 = pseudorandom hopping1..63 = pseudorandom hopping
Base Band Hopping
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Baseband HoppingBaseband Hopping
TRX 1TRX 1
TRX 2TRX 2
TRX 3TRX 3
00 11 7722 TimeslotTimeslot
TRX 4TRX 4
BCBCCHCH
f 1f 1
f 2f 2
f 3f 3
f 4f 4
HSN1HSN1 (BB hopping group 1 and RF hopping)(BB hopping group 1 and RF hopping)Timeslot 0 hops over TRXs 2Timeslot 0 hops over TRXs 2--4 only4 only
BCCH does not hopBCCH does not hop
HSN2HSN2 (BB hopping group 2)(BB hopping group 2)Timeslots 1Timeslots 1--7 hop over all TRXs7 hop over all TRXs
RF HoppingStandard technique
All TRXs hop except TRX1 (provides BCCH)All TRXs hop except TRX1 (provides BCCH)Up to 63 frequencies available defined by mobile al location list Up to 63 frequencies available defined by mobile al location list --> better hopping gain> better hopping gain
mobileAllocationListmobileAllocationList Setting of ARFCN values Setting of ARFCN values usedMobileAllocationusedMobileAllocation (MAL)(MAL) 0,1...20000,1...2000 0 = BTS detached from any list0 = BTS detached from any list
1..2000 = indicates list which shall be used1..2000 = indicates list which shall be used
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TRX 1TRX 1
TRX 2TRX 2
TRX 3TRX 3
00 11 7722 TimeslotTimeslot
TRX 4TRX 4
BCBCCHCH f1 f1 –– no hoppingno hopping
f2,f3..fn f2,f3..fn –– hopping accordinghopping accordingmobile allocation list mobile allocation list
One hopping sequenceOne hopping sequencenumber onlynumber only
Standard techniqueStandard technique
9 hopping 9 hopping hoppinghopping frequencies MAI = 0..8frequencies MAI = 0..8But 3 frequencies available for every TRX onlyBut 3 frequencies available for every TRX only
Freeform hoppingFreeform hopping
For every sector For every sector samesamemobile allocation listmobile allocation listhopping sequence numberhopping sequence numberframe number (frame synchronization)frame number (frame synchronization)
RF HoppingFreeform Hopping
MAIO Offset MAI
TRX-1 (BCCH) -
TRX-2 0
TRX-3 1
TRX-4 2
TRX-5 (BCCH) -
TRX-6 3
Sector-1 0
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frame number (frame synchronization)frame number (frame synchronization)
For every sector For every sector differentdifferentstarting points for hopping sequencestarting points for hopping sequencepossible by mobile allocation index offsetpossible by mobile allocation index offset
maioOffsetmaioOffset (MO)(MO) 0..620..62
setting of MAIOsetting of MAIO
9 hopping 9 hopping hoppinghopping frequencies MAI = 0..8frequencies MAI = 0..89 frequencies available for every TRX9 frequencies available for every TRX
TRX-6 3
TRX-7 4
TRX-8 5
TRX-9 (BCCH) -
TRX-10 6
TRX-11 7
TRX-12 8
Sector-3 6
Sector-2 3
Freeform hoppingFreeform hopping
•• Not adequate for MA list with consecutive ARFCN Not adequate for MA list with consecutive ARFCN valuesvalues•• Avoids coAvoids co--channel interference but not adjacent channel interference but not adjacent channel interferencechannel interference
Flexible MAIO managementFlexible MAIO management
RF HoppingFlexible MAIO Management
MAIO Offset
MAIO Step MAI
TRX-1 (BCCH) -
TRX-2 0
TRX-3 2
TRX-4 4
TRX-5 (BCCH) -
TRX-6 6
0Sector-1 2
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Flexible MAIO managementFlexible MAIO management
MAIO increases with constant step size from one TRX MAIO increases with constant step size from one TRX to the next oneto the next one
maioStepmaioStep (MS)(MS) 1..621..62
maioOffsetmaioOffset = 0, 6, 12 for sector 1, 2, 3= 0, 6, 12 for sector 1, 2, 3maioStepmaioStep = 2= 218 frequencies required (2 * number of hopping TRXs )18 frequencies required (2 * number of hopping TRXs )
TRX-6 6
TRX-7 8
TRX-8 10
TRX-9 (BCCH) -
TRX-10 12
TRX-11 14
TRX-12 16
Sector-3 2
6
12
Sector-2 2
BCCHBCCH
Band allocation:Band allocation:
Flexible MAIO managementFlexible MAIO managementMAIO Offset + MAIO StepMAIO Offset + MAIO Step
BCCHBCCH
Band allocation:Band allocation:
Freeform hoppingFreeform hoppingMAIO OffsetMAIO Offset
RF Hopping (Tight Frequency Reuse)
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MA listMA listConsecutive ARFCNConsecutive ARFCN
Only BCCH frequency planning requiredOnly BCCH frequency planning requiredOnly BCCH frequency planning requiredOnly BCCH frequency planning required
MA listMA listNonNon--adjacent ARFCNadjacent ARFCN
MA list and BCCH frequency planning requiredMA list and BCCH frequency planning requiredMA list and BCCH frequency planning requiredMA list and BCCH frequency planning required