本文關(guān)鍵詞： 動態(tài)TDD 混合自動重傳 過渡無線幀 時序沖突　出處：《電信科學(xué)》2017年05期 　論文類型：期刊論文

【摘要】：動態(tài)TDD技術(shù)的引入不僅能夠很好地解決突發(fā)性業(yè)務(wù)需求增長較快的問題,還能提升小區(qū)通信系統(tǒng)的服務(wù)質(zhì)量。在動態(tài)TDD系統(tǒng)中,無線幀配置可以通過系統(tǒng)中的負(fù)載量來改變。但是一些子幀可能會在重配后改變傳輸方向,導(dǎo)致一些HARQ進(jìn)程出現(xiàn)時序沖突,影響系統(tǒng)性能。為了解決動態(tài)TDD系統(tǒng)中的HARQ時序沖突問題,提出了一種基于過渡無線幀的混合自動重傳方案。當(dāng)重配周期到來時,在重配點(diǎn)后增加一個過渡無線幀,使得HARQ時序以一種較簡單、時序沖突較少的方式過渡到重配后的無線幀。在LTE系統(tǒng)仿真平臺上建立HARQ模型進(jìn)行性能驗證,仿真結(jié)果表明,所提方案能有效地提升系統(tǒng)資源利用率,并給系統(tǒng)平均吞吐量帶來增益。
[Abstract]:The introduction of dynamic TDD technology can not only solve the problem of rapid growth of sudden business demand, but also improve the quality of service of residential communication system. Wireless frame configuration can be changed by the amount of load in the system, but some subframes may change the direction of transmission after rematching, resulting in timing conflicts in some HARQ processes. In order to solve the problem of HARQ timing conflict in dynamic TDD system, a hybrid automatic retransmission scheme based on transition wireless frame is proposed. When the rematch period comes, a transitional wireless frame is added after the rematch point. The HARQ timing is transferred to the rematched wireless frame in a simple manner with less timing conflicts. The HARQ model is built on the LTE system simulation platform to verify the performance. The simulation results show that, The proposed scheme can effectively improve the system resource utilization and bring gains to the average throughput of the system.
【作者單位】： 重慶郵電大學(xué)通信與信息工程學(xué)院;
【分類號】：TN929.5

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本文編號：1510066