wimax 16e frequency planning
TRANSCRIPT
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HUAWEI TECHNOLOGIES Co., Ltd.
www.huawei.com
HUAWEI Confidential
Security Level:
WiMAX Frequency planning
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TOPIC
WiMAX Frequency Allocation
WiMAX Sub-carrier permutations
WiMAX typical frequency reuse pattern
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Canada2.3/2.5GHz3.5/5GHz
USA1.5/2.3GHz2.5/5GHz
C & SA2.5/3.5GHz
5GHz
ME & A
3.5GHz5GHz
Europe3.5GHz5GHz
Russia2.3/2.5/3.5GHz
5GHz
Asia Pacific2.3/3.3/3.5GHz
5GHz
Each geographical region defines and regulates its own set of licensed and license-exempt bands, as shown above.
The main WiMAX application in the world is 2.3, 2.5GHz and 3.5GHz
Spectrum by Region
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Data
400 chips
Scalable of Channel Bandwidth
CDMA 1.2288MHz
WCDMA 3.84MHz
GSM 200KHz
WiMAX 1MHz ~ 20MHz
WiMAX channel band is flexible
WIMAX Forum defined 5 types channel bands:3.5, 5, 7, 8.75 and 10MHz
Now the industry mainly support 3 types channel bands: 5, 7, and 10MHz
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TOPIC
WiMAX Frequency Allocation
WiMAX Sub-carrier permutations
WiMAX typical frequency reuse pattern
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OFDMA PermutationsDifferent ways of grouping into channels in 802.16
are called Permutations/ Sub-carrier allocation
Two types of Permutation Schemes are defined:Full and partial sub channel usage modes
Distributed and adjacent permutations
Three main permutations:
FUSC Full Usage of Subchannels (downlink only )
Achieves best frequency diversity by spreading tones over entire band
Distributed permutations
PUSC Partial Usage of Subchannels (uplink & downlink) / Distributed permutations
Groups tones into tiles/clusters to enable fractional frequency re -useStill has distribution of tones across band for each subchannel
AMC (or Band AMC) Adaptive Modulation and Coding (UL & DL) /
Adjacent Subcarrier Permutation
Uses adjacent tones for each subchannel for use with beamforming
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Allocation of Sub-carrier
Pilot sub-carrier Data sub-carrier
Guard sub-carrier
DC sub-carrier
10MHz*(28/25)=10.94KHz*1024
Calculation Method :channel Bandwidth10MHz
10*(28/25)=11.2FFT Size:102430 sub-channel for DL PUSC11.2MHz/1024=10.94KHz1/10.94KHz=91.4 microseconds91.4*1/8=11.4(Cyclic Prefix is 1/8)5millisecond/102.9 microseconds=48
Overview MIMO & AAS AMC & Other
DL-PUSC
Parameters Values
System Bandwidth(MHz) 1.25 2.5 5 10 20
FFT Size(Nfft) 128 N/A 512 1024 2048
Number of Guard Subcarriers 43 N/A 91 183 367
Number of Cluster/Subchannels 6/3 N/A 30/15 30 120/60
Number of Used Subcarriers 85 N/A 420 840 1680
Number of Data Subcarriers 72 N/A 360 720 1440
Number of Pilot Subcarriers 12 N/A 60 120 240
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TOPIC
WiMAX Frequency Allocation
WiMAX Sub-carrier permutations
WiMAX typical frequency reuse pattern
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Definition of frequency reuse pattern
The network is divided into clusters with N cells, S sector per cell, and K different frequency allocations per cell
The red markings correspond to sectors deployment in the same frequency allocation.
N S K
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There is one frequency point F1. Eachsector per site with 3 sectors has 1/3 sub-channels of the one frequency point. DLand UL both use PUSC permutation model
Typical frequency reuse PUSC 1 3 1
Application scenario Fit for the initial phase for coverage without high
capacity requirement.
Cooperate with FFR.
Advantage Only one frequency point for whole network.
Easy to deploy.
Disadvantage The lowest throughput per site.
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Typical frequency reuse PUSC with all SC 1 3 3
There are 3 frequency points F1, F2, F3. Each sector of site with 3 sectors uses onefrequency respectively. DL and UL both use PUSC with all sub-channel permutation models.
Application scenario Recommended to satisfy higher capacity requirement.
Advantage High throughput per site. Easy to deploy. Interference is lower than PUSC 1*3*1 at the cell edge.
Disadvantage Need much frequency resource.
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Typical frequency reuse FFR 1 3 1
The area beyond cell and core area of the cell all use same one frequency point; the PUSCwill be used in the area beyond cell, each sector of per site with 3 sectors has 1/3 sub-channelsof the one frequency point; and the core area of the cell will use the PUSC with all SCpermutation, all sub-channel of the same one frequency will be used;
Application scenario Recommended for PUSC 1*3*1 network expansion in future.
Cooperate with FFR.
Advantage Only one frequency point for whole network. Higher frequency efficiency per sector compare with PUSC1*3*1 Larger throughput per sector compare with PUSC1*3*1
Disadvantage More interference consideration. DL interference margin is3.5 dB, UL interference margin is 1dB. Lower throughput per sector compare with PUSC 1*3*3.
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Case 1
Assume there are only 15MHz frequency resource
15MHz
25152500
Frequency options
1. PUSC with all SC 1*3*3 5MHz;
2. PUSC 1*3*1 10MHz;
3. FFR 1*3*1 10MHz;
Analysis Capacity: The site capacity of PUSC 1*3*1 is lowest, and the capacity of PUSC with all SC 1*3*35MHz is similar as FFR 1*3*1 10MHz.
Coverage: The interference of FFR 1*3*1 is higher, and the interference of the other two methodsare similar.
The configuration and optimization of PUSC with all SC 1*3*3 5MHz is easier than FFR.
We recommend PUSC with all SC 1*3*3 5MHz base on the analysis above
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Case 2
Assume there are only 20MHz frequency resource
20MHz
25202500
Frequency options
1. PUSC with all SC 1*3*4 5MHz;
2. FFR 1*3*2 10MHz;
3. FFR 1*3*1 10MHz 2 carriers;
Analysis Capacity: The capacity of PUSC with all SC 1*3*4 5MHz is similar as FFR 1*3*2 10MHz, and thesite capacity of FFR 1*3*1 10MHz 2 carriers is nearly twice of the other two.
Coverage: The interference of FFR 1*3*1 is the highest, and the interference of FFR 1*3*2 is thelowest.
The configuration and optimization of PUSC with all SC 1*3*3 5MHz is easier than FFR.
We recommend FFR 1*3*1 10MHz 2 carriers base on the analysis above
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Case 3
Assume there are only 30MHz frequency resource
30MHz
25302500
Frequency options
1. PUSC with all SC 1*3*3 10MHz;
2. FFR 1*3*3 10MHz;
3. FFR 1*3*1 10MHz 3 carriers;
Analysis Capacity: The capacity of FFR 1*3*3 10MHz is about 90% of PUSC with all SC 1*3*3 10MHz,and the site capacity of FFR 1*3*1 10MHz 3 carriers is 60% more than PUSC with all SC 1*3*310MHz.
Coverage: The interference of FFR 1*3*1 is the highest, and the interference of FFR 1*3*3 is thelowest.
The configuration and optimization of PUSC with all SC 1*3*3 10MHz is easier than FFR.
We recommend PUSC with all SC 1*3*3 10MHz base on the analysis above.
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Summary
1. FFR or PUSC with all SC 5MHz is better when the frequency band < 30MHz
2. We recommend PUSC with all SC 10MHz when the frequency band >= 30MHz
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HUAWEI TECHNOLOGIES Co., Ltd.
www.huawei.com
HUAWEI Confidential
Security Level:
Thank You
www.huawei.com
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Some Frequency planning pictures
F1
F4F3
F4
F1F2
F2
F3 F4
F3
F2 F1
F3
F2F1
F2
F3F4
F4
F1F2