UMTS900 - Guideline

UMTS 900 – Guidelines 29-11-2011

Radio Design Team

Content ¾U900 – Initial Strategy ¾U900 – Design Options ¾U900 – Guidelines 3 stages ¾Neighbouring strategy ¾U900 Optimization for Coverage, Performance, Capacity.

U900 – Initial Strategy ¾ U900 layer used to provide additional coverage and capacity. ¾ Proposal is to use U900 for coverage first, then capacity. ¾ Where there is U900/U2100 coverage, UEs are directed to idle and access the network via the U2100 layer (qOffsets or HCS). ¾ Normal load situations: ¾ Traffic will be distributed evenly between U2100 co-sectored cells.

¾ High load situations: ¾ U900 cells will be used to relieve traffic from the co-sectored U2100 cells.

¾ The strategy will reserve capacity on the U900 layer for: ¾ UEs with ONLY U900 coverage (e.g. indoor/rural coverage provided by the extra penetration/pathloss of U900) to reduce the risk of overloading the cell. ¾ Any free capacity is the available when the load increases on the U2100 cells.

C3- Company Confidential Technical Options

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U900 – Idle Mode Initial Strategy


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U900 – Initial Inter frequency Load Sharing (IFLS) Coverage Relations


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Design Options


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Guidelines UMTS 900 – Stage One ¾ Stage One - Initial Neighbour Planning: 1. Plan initial neighbour lists for UMTS900 and surrounding area. 2. Using visual inspection, planning tools and existing statistics. 3. Includes: ¾ ¾ ¾ ¾ ¾ ¾

Clean 2G BA lists. Clean 3G inter-frequency neighbours. Plan 3G UMTS900 <> UMTS900 neighbours. Plan 3G UMTS900 <> UMTS2100 neighbours. Plan 2G IRAT neighbours. Audit and Plan idle mode parameters to meet design.


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Guidelines UMTS 900 – Stage two ¾ Stage Two – Bringing Cluster Live 1. Bringing Cluster Live and Initial Performance Monitoring/Optimisation. 2. Powering up Cluster. ¾ Low power starting point, steadily increasing while maintaining performance.

3. Updating neighbour lists based on W-NCS and GW-NCS. ¾ DCR is the main concern. ¾ Increase traffic on 3G with correct 2G to 3G relations for idle mode reselection.


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Guidelines UMTS 900 – Stage three ¾Stage Three – Optimisation ¾ Depending on U900 traffic, site can be further optimised for: ¾ Coverage ¾New traffic, extending macro range or indoor coverage. ¾This is the default design. ¾ Capacity ¾Treat as a new carrier to relieve congestion. ¾ Performance. ¾Low traffic sites allow traffic to be pushed to UMTS900 and benefit from greater HS performance, throughput


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Guidelines UMTS 900 – New Site/ Clusters


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Neighbouring Strategy


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Idle and Handover Strategy – Summary (I) ¾Currently in VF-UK Inter frequency handover is de-activated, the Design has to take into consideration that it will be turned back on.

¾Devices are capable of monitoring three 3G frequencies plus IRAT according to 3GPP specs. This applies to the SIB11 block rather than what the UE is actually measuring at the time.

¾UEs cannot be predicted: ¾ Reports of UEs continuously restarting when entering a cell with greater than 3 frequencies. ¾ Some UEs will filter out forth frequencies or ignore those that they do not support. ¾ For handover Ericsson RNCs will filter out in the measurement reports frequencies not supported by the UE.


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Idle and Handover Strategy – Summary (II) ¾Clear strategy to maximise the possibility of a inter frequency handover. ¾ Define inter frequency cells of the same sector in a neighbouring site it is reducing how many tiers of neighbours you can define, and thus increasing DCR. ¾ Define more than three frequencies then it is wasting space in the neighbour list as these may be ignored and thus DCR will increase. ¾ Chose F1 as the one target frequency for inter frequency handover outside of the co-site for U900 and U2100. F1 has U900 as the target frequency for inter frequency handover.

¾All frequencies have to have relations to Femto cells. ¾ Thus as this is on F3, then for F1, F2, and U900 Femtos represent one of the allowed frequencies.

¾Coverage relations are defined between all cells on a sector. ¾ A coverage relation can exist without a UTRAN relation.


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UMTS 2100 2 carries- Camping in Idle Mode (I) Intra-Freq cell reselection Inter-Freq cell reselection Inter-RAT cell reselection

FEMTO / F3

Femto Cells Edge of the cell

F1_HSPA/R99

CellA_GSM

F2_HSPA/R99

F2_HSPA/R99

F1_HSPA/R99

F1_HSPA_R99

CellB_GSM


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CellD_GSM

UMTS 2100 2 carries - Camping in Idle Mode (II) 1. UE can camp ALL carriers equally. 2. Intra Frequency F1ÅÆF1, F2ÅÆF2. 3. Inter Frequency re-selection: ¾ ¾ ¾ ¾

F1ÅÆ F2 on the co-sector cells F1Æ Femto F2ÆF1 on non co-sectors cells F2Æ Femto

4. Inter frequency reselection base on coverage take place at the edge of each carrier. 5. Inter RAT reselection: – – –

GSM ÅÆF1 GSMÆFemto F2 ÆGSM

.


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UMTS 2100 2 carries in Connected Mode (I) Intra-Freq Handover Inter-Freq Handover Inter-RAT Handover Inter-Freq Load Share HO

Edge of the cell

F1_HSPA/R99

CellA_GSM

F2_HSPA/R99

F2_HSPA/R99

F1_HSPA/R99

F1_HSPA_R99

CellB_GSM


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CellD_GSM

UMTS 2100 2 carries in Connected Mode (II) 1. Intra Frequency handover F1ÅÆF1, F2ÅÆF2. 2. Inter Frequency Load Share handover, except inter frequency handover base on coverage, is enabled between the co-sector cells (F1&F2). 3. Inter Frequency : ¾ F1ÅÆ F2 on the co-sector cells ¾ F2ÆF1 on non co-sectors cells

4. Inter frequency handover base on coverage take place at the edge of each carrier. 5. All UMTS carries can handover to GSM, but GSM to UMTS handover is not allowed to avoid ping pong inter RAT handover ¾ F1ÆGSM ¾ F2 Æ GSM

Note: ¾ Currently E/// is set to GSM prefer, inter frequency disable. ¾ NSN and Huawei can measure simultaneously inter frequency and GSM.


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UMTS 2100 3 carriers - Camping in Idle Mode (I) Intra-Freq cell reselection Inter-Freq cell reselection Inter-RAT cell reselection Femto Cells

F3_HSPA/R99

F3_HSPA/R99

FEMTO/ F3

Edge of the cell F2_HSPA/R99

F1_HSPA/R99

CellA_GSM

F2_HSPA/R99

F2_HSPA/R99

F1_HSPA/R99

F1_HSPA_R99

CellB_GSM

Radio Design Team

C3- Company Confidential

Technical Options

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CellD_GSM

19/08/2011

UMTS 2100 3 carriers- Camping in Idle Mode (II) 1. All UMTS Carriers can support R99 and HSPA. 2. Intra Frequency F1ÅÆF1, F2ÅÆF2, F3ÅÆF3&Femto. 3. UE can camp ALL carriers equally. – – – – – – –

F1ÅÆ F2 on the co-sector cells F1ÅÆ F3 on the co-sector cells F1Æ Femto F2ÆF1 on non co-sectors cells F2Æ Femto F3Æ F1 on non co-sectot cells F3Æ Femto

4. Inter RAT reselection: – – – –

GSMÅÆF1 GSMÆFemto F2 Æ GSM F3 Æ GSM

Radio Design Team


Technical Options

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19/08/2011

UMTS 2100 3 carriers- Camping in Connected Mode (I) Intra-Freq HO Inter-Freq HO Inter-RAT HO Inter-Freq Load Share HO

F3_HSPA/R99

F3_HSPA/R99


F1_HSPA/R99

CellA_GSM

F2_HSPA/R99

F2_HSPA/R99

F1_HSPA/R99

F1_HSPA_R99

CellB_GSM

Radio Design Team


Technical Options

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CellD_GSM

19/08/2011

UMTS 2100 3 carriers in Connected Mode (II) 1. Intra Frequency handover F1ÅÆF1, F2ÅÆF2, F3ÅÆF3. 2. Inter Frequency Load Share handover is enabled between the co-sector cells (F1&F2&F3). 3. Inter Frequency: 1. 2. 3. 4. 5.

F1ÅÆ F2 on the co-sector cells F1ÅÆ F3 on the co-sector cells F2ÅÆ F3 on the co-sector cells F2ÆF1 on non co-sectors cells F3 ÆF1 on non co-sectors cells

4. Inter frequency handover base on the coverage only take place at the edge of each carrier. 5. All UMTS carries can handover to GSM, but GSM to UMTS handover is not allowed to avoid ping pong inter RAT handover – – –

F1ÆGSM F2 Æ GSM F3 Æ GSM

Note: ¾ Currently E/// is set to GSM prefer, inter frequency disable. ¾ NSN and Huawei can measure simultaneously inter frequency and GSM.

Radio Design Team


Technical Options

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19/08/2011

UMTS 2100 2 carries + U900 1 carrier Camping in Idle Mode (I) Intra-Freq Neighbor Inter-Freq Neighbor

FEMTO

Inter-RAT Neighbor F2_HSPA/R99

F1_HSPA/R99

F2_HSPA/R99

F1_HSPA/R99

F1_HSPA_R99

U900

CellA_GSM

Femto Cells

F2_HSPA/R99

U900

CellB_GSM

CellD_GSM

Note: According 3GPP specs devices are capable of monitoring only three 3G frequencies plus GSM. . Radio Design Team


Technical Options

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19/08/2011

UMTS 2100 2 carries + U900 1 carrier Camping in Idle Mode (II) 1. All UMTS Carriers can support R99 and HSPA. 2. At the moment UE bias towards 2100. 3. Intra Frequency F1ÅÆF1, F2ÅÆF2, U900ÅÆU900. 4. Inter-Freq reselection: ¾ According 3GPP specs devices are capable of monitoring only three 3G frequencies plus GSM. ¾ F1ÅÆU900 ¾ F1Æ Femto ¾ F2 ÆF1, Femto ¾ U900 Æ Femto

5. Inter RAT reselection: ¾ ¾ ¾ ¾

GSM ÅÆF1 GSMÅÆU900 GSM ÆFemto F2Æ GSM

Radio Design Team


Technical Options

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19/08/2011

UMTS 2100 2 carries + U900 1 carrier Mobility in Connected Mode (I)

Inter-Freq Load Share HO Intra-Freq handover Inter-RAT handover

Edge of the cell Inter-Freq HO F2_HSPA/R99

F2_HSPA/R99

F2_HSPA/R99


F1_HSPA/R99

F1_HSPA_R99

U900

CellA_GSM

U900

CellB_GSM

Radio Design Team


Technical Options

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CellD_GSM

19/08/2011

UMTS 2100 2 carries + U900 1 carrier Mobility in Connected Mode (II) 1.

All UMTS Carriers can support R99 and HSPA.

2.

Intra Frequency F1ÅÆF1, F2ÅÆF2, U900ÅÆU900.

3.

Inter-Freq: ¾ ¾ ¾

According 3GPP specs devices are capable of monitoring only three 3G frequencies plus GSM. F1ÅÆU900 F2 ÆF1

4.

Inter-Freq Load Share handover is defined in the co-sector cells.

5.

All UMTS carries can handover to GSM, but GSM to UMTS handover is not allowed to avoid ping pong inter RAT handover – –

F1ÆGSM F2 Æ GSM

Note: ¾

Currently E/// is set to GSM prefer, inter frequency disable.

¾

NSN and Huawei can measure simultaneously inter frequency and GSM.

Radio Design Team


Technical Options

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19/08/2011

UMTS 2100 3 carries + U900 1 carrier Camping in Idle Mode (I) Intra-Freq Neighbor Inter-Freq Neighbor

FEMTO / F3

F3_HSPA/R99

F3_HSPA/R99

Inter-RAT Neighbor F2_HSPA/R99

F1_HSPA/R99

F2_HSPA/R99

F1_HSPA/R99

F1_HSPA_R99

U900

CellA_GSM

Femto Cells

F2_HSPA/R99

U900

CellB_GSM

Radio Design Team


Technical Options

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CellD_GSM

19/08/2011

UMTS 2100 3 carries + U900 1 carrier Camping in Idle Mode (II) 1. All UMTS Carriers can support R99 and HSPA. 2. At the moment UE bias towards 2100. 3. Intra Frequency F1ÅÆF1, F2ÅÆF2, F3ÅÆF3&Femto, U900ÅÆU900. 4. Inter-Freq reselection: ¾ According 3GPP specs devices are capable of monitoring only three 3G frequencies plus GSM. ¾ F1ÅÆU900 ¾ F1ÅÆF3 on the co-sectors cells ¾ F1Æ Femto ¾ F2 ÆF1,F3, Femto ¾ F3ÆF1 on non co-sector cells ¾ F3ÆF2 ¾ U900 Æ Femto

5. Inter RAT reselection: ¾ ¾ ¾ ¾ ¾

GSM ÅÆF1 GSMÅÆU900 GSM Æ Femto F2Æ GSM F3ÆGSM

Radio Design Team


Technical Options

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19/08/2011

UMTS 2100 3 carries + U900 1 carrier Mobility in Connected Mode (I)

Inter-Freq Load Share HO Intra-Freq handover Inter-RAT handover

F3_HSPA/R99

F3_HSPA/R99

Inter-Freq HO F2_HSPA/R99

F2_HSPA/R99

F2_HSPA/R99


F1_HSPA/R99

F1_HSPA_R99

U900

CellA_GSM

U900

CellB_GSM

Radio Design Team


Technical Options

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CellD_GSM

19/08/2011

UMTS 2100 3 carries + U900 1 carrier Mobility in Connected Mode (II) 1.

Intra Frequency F1ÅÆF1, F2ÅÆF2, F3ÅÆF3, U900ÅÆU900.

2.

Inter-Freq: ¾ ¾ ¾ ¾ ¾

According 3GPP specs devices are capable of monitoring only three 3G frequencies plus GSM. F1ÅÆF3 on the co-sectors cells F2 ÆF1,F3 F3ÆF1 on non co-sector cells F3ÆF2

3.

Inter-Freq Load Share handover is defined in the co-sector cells.

4.

All UMTS carries can handover to GSM, but GSM to UMTS handover is not allowed to avoid ping pong inter RAT handover – – –

F1ÆGSM F2 Æ GSM F3 Æ GSM

Note: ¾

Currently E/// is set to GSM prefer, inter frequency disable.

¾

NSN and Huawei can measure simultaneously inter frequency and GSM.

Radio Design Team


Technical Options

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19/08/2011

U900 - Optimization


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Optimization - Idle Mode Parameters ¾ Define qOffsets correctly for Inter/Intra-frequency neighbour relations on the site: ¾ All Intra-Frequency qOffset2sn=0. ¾ Inter-Frequency UMTS2100 ÅÆ UMTS2100 qOffset2sn = 0. ¾ Inter-Frequency UMTS2100 Æ UMTS900 qOffset2sn = +50. ¾ Inter-Frequency UMTS900 Æ UMTS2100 qOffset2sn = -50. ¾ Inter-Frequency UMTS2100 Æ FEMTO qOffset2sn = -40. ¾ Inter-Frequency UMTS900 Æ FEMTO qOffset2sn = -40


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U900 – Optimization (I) 1. New Coverage/New Traffic: ¾ Base rollout design. ¾ Existing traffic is kept on U2100 layers, keeping U900 layer free for new traffic (e.g. New Indoor coverage). ¾ Stops new U900 layer soaking up traffic from surrounding areas and going into congestion during rollout and initial tuning.

2. Increased Coverage: ¾ Areas of high mobility where traffic would be served better if on the U900 layer. (e.g. coverage holes on Motorways, main roads).

3. Capacity: ¾ Sites where U2100 layers are more highly loaded than U900. ¾ Traffic is distributed evenly over all cells on the site.

4. Performance: ¾ Low traffic sites. ¾ Traffic is pushed to U900 to benefit from better HS performance due to better CQI, RSCP etc for a given location over U2100.


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U900 – Optimization (II)


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U900 – Optimization (III) – Recommended starting values Capacity Settings U2100:

New Coverage/New Traffic Settings U2100: dchIflsMarginCode = 0 dchIflsMarginPower = 0 hsIflsMarginUsers = 0

dchIflsMarginCode = 0 dchIflsMarginPower = 0 hsIflsMarginUsers = 0

Settings U900:

Settings U900:



Increased Coverage Settings U2100:

Performance (HS) Settings U2100:



Settings U900:

Settings U900:


dchIflsMarginCode = 50 dchIflsMarginPower = 50 hsIflsMarginUsers = 0 C3- Company Confidential

Technical Options

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U900 – Coverage Relation – Initial Rollout Design

All co-sectored cells have two way coverage relations between all other cells in the sector.


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U900 – Optimization - Coverage



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U900 – Optimization – Performance (HS)

All co-sectored cells have two way coverage relations between all other cells in the sector. C3- Company Confidential Technical Options

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U900 – Optimization - Capacity



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U900 – Optimization – Increased Coverage



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Thank you


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UMTS900 - Guideline

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