A novel method for the efficient reduction of TDD based Electromagnetic Asymmetry with Demand based slot allocation scheme incorporating TD-SCDMA
Chandrasekhar Paidimarri, Deepthi Kvbl · 2013
Most mobile communications services such as high multimedia are Asymmetric. There is a great difference in their downlink & uplink requirement both in transmitted amount and transmitted rate.This paper discuss asymmetry between uplink and downlink in view of EM radiation, termed as electro-magnetic Asymmetry.The influence of surrounding environment caused by EM radiation is always a serious problem.Also in view of the fact that the wireless resource is limited and to mainly minimise the asymmetry in TDD and to effectively mitigate cross-slot interference an efficient scheme called Demand based slot allocation (DBSA) with reference to TD-SCDMA is proposed. Finally,the simulation result shows that DBSA strategy markedly minimize the Asymmetry leading to human safety and also improves the system performance leading to higher resource utilization. n view of the effects of electromagnetic radiation to human body,this paper discusses asymmetry between uplink and downlink in mobile communications system in a new aspect which is termed as Electromagnetic Asymmetry (EA). In the future, most mobile communications services will be asymmetric, such as high multimedia (1, 3). The downlink of service requirement is much greater than the uplink both in transmission total amount and transmission rate. In this paper, we consider the asymmetric characteristic of uplink and downlink caused by electromagnetic radiation, which is termed as Electromagnetic Asymmetry (EA) between uplink and downlink. The influence on surrounding environment caused by electromagnetic radiation is always a controversial problem. With the large-scale application of mobile communications, the total amount of electromagnetic radiation will increase and people will have to re-evaluate the social effect of mobile communications (5). The influence of electromagnetic radiation will be one of the most important elements which should be considered in the research and design of mobile communications system. This paper analyzes the asymmetric characteristics of mobile communications system influenced by electromagnetic radiation. And also because of the need of rich mobile communication services and the difference of the traffic volume requirement between uplink and downlink, the asymmetric traffic services now becomes an important feature for the mobile communication system. However ,the wireless resources is finite and the asymmetric traffic services varies from cell to cell. Demand based slot allocation (DBSA) is the most effective method proposed to settle these issues, and it plays an important role in TD-SCDMA network. DBSA can govern the overall service quality and offer flexible downlink and uplink capacity & if the technology of DBSA is applied to the mobile communication system in TD- SCDMA network, it will also raise the system capacity and get better the resource utilization.