Aggressive Subchannel Allocation Algorithm For Efficient Dynamic Channel Allocation In Multi User...

Aggressive sub-channel allocation algorithm for efficient dynamic channel allocation in muti-user OFDMA system

報告人 : J.SHOW指導教授 : H.H.Liu

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References

SangJun Ko, Joo Heo and KyungHi Chang, "Aggressive sub-channel allocation algorithm for efficient dynamic channel allocation in muti-user OFDMA system,"

17ht Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications(PIMRC'06),

Sept. 2006, page(s):1-5

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Outline

• Introduction – BABS (Bandwidth Based on SNR)– ACG (Amplitude Craving Greedy)

• Algorithm– ASA (Aggressive Sub-channel Allocation)

• Performance Validation• Conclusion

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Introduction

• Round Robin• Proportional fairness– Chosen the highest Rk(t)/Tk(t) to transmission

• Bandwidth Based on SNR• Amplitude Craving Greedy

Tk(t) : average throughputRk(t) : kth user’s channel achievable rate tc : control latency parameterK* : chosen user

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Algorithm

Step 1determines user to scheduled

Step 2chose maximum rate sub-channel to the user

Step 3evaluate date rate

Step 4 chose sub-channel for user

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Algorithm(cont.)

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Algorithm(cont.)

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Performance Validation

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Performance Validation(cont.)

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Performance Validation(throughput)

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Sub-band && users allocation

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Conclusion

• Not consider fairness

• ASA (Aggressive Sub-channel Allocation)• Simple

• Sub-channel && User which is first !

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