WiMAX 16e Frequency Planning

7/28/2019 WiMAX 16e Frequency Planning

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HUAWEI TECHNOLOGIES Co., Ltd.

www.huawei.com

HUAWEI Confidential

Security Level:

WiMAX Frequency planning


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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 2

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


4/18HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 4

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


5/18HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 5

TOPIC





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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





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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


20MHz

25202500

Frequency options


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.


We recommend FFR 1*3*1 10MHz 2 carriers base on the analysis above


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Case 3


30MHz

25302500

Frequency options


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.


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

Documents

WiMAX 16e Frequency Planning