Resource Management And QoS Enhancement For Next Generation Wireless Communication System

With the arriving of global network era, more and more peoples want to use broadband access service at anytime, anywhere. Mobile communication technology is the only way to achieve this aim. It's been expected that the total number of worldwide broadband subscribers will exceed 1.8 billion, and most of them will use wireless mobile network. It's been required that the future of mobile communications network must have a higher peak rates, better coverage, higher spectrum efficiency and system capacity.The research aim in the paper is improve the performance of existing scheduling algorithms at the conclusion based on the results of study radio resource management techniques of the LTE system comprehensively and in-depthly, and simulate and disscuss the parameters of the algorithm of key technical. Innovation of this paper is listed in the following:(1) Put forward an Uplink Resource Scheduling Algorithm compatible with the premise of the existing system.The key algorithm of LTE uplink scheduling based on the BSR reporting mechanism is studied and analysised. And then a more accurate added BSR report program based on happy bits is purposed to improve the performance of the uplink resource scheduling. The program reflect a more accurate cache state information of UE uplink by use the reserved sub-frame header bits on the UE side and some mapping rules to help eNB more rational allocation of time/frequency resources. Simulation shows that the algrithom can improve the efficiency of radio resource scheduling and the whole system resource utilization(2) Put forward a key Scheduling Algorithm Mechanism to improve TCP performance effectively compatible with the existing system.Firstly the issues of the existing TCP congestion control mechanisms applied in the mobile environment are studied. Meanwhile, it's pointed out that the TCP protocol is designed for the wired environment. And the conditions in the mobile environment will reduce the TCP transmission efficiency.It is valuable to research and design a efficient resource scheduling algorithm to improve the performance of data services and end-user experience.By drawing on the semi-continuous scheduling algorithm for the VoIP data packets, we present a improvement on radio resource scheduling algorithm. By map the TCP ACK packets to a higher priority logical channel to reducing the ACK packets discarded and congestion probability in the wireless channels, program avoid frequently open of TCP congestion control mechanisms. Simulation shows that the proposed program can enhance the RTT packet delay, throughput, etc, have some applicability.(3) Propose an effective TCP/IP header compression mechanism for LTE systemLTE system is a higher data rates and capacity network than ever before wireless systems. ROHC (robust header compression) header compression protocol has been used in LTE system for wireless packet compression to effectively wireless utilization. But ROHC algorithm complexity is too high to achieve the difficulties and the poor adaptability of high-speed data services and so on. With the consistency of TCP connection tracking table, we proposed a link layer adaption mechanism TCP header compression algorithm. Simulation results show that, compared to ROHC protocol, the proposed algorithm has higher compression efficiency, and improve the utilization of wireless resources, while also better adapt to high-bandwidth environment in the LTE system, with lower computational complexity and better robustness and applicability.(4) QoS Guarantee for Typeâ… Relay Un Interface in LTE-A systemExisting Typeâ… Relay technology has a higher delay in a variety of real-time data services, especially for the VoIP. In this paper, a multi-TB transmission scheme for Typeâ… RelayUn interface is purposed to improve the user QoS experience. By the use of multiple virtual UE's node at the Relay Un interface, the RN can significantly reduce the retransmission delay and improve the QoS for Relay uplink interface. Meanwhile, the interface is also implemented on a multi-service Qos assurance in the Un interface. Mechanism can significantly improve the VoIP and other real-time business performance in condition of multi-service environment.In summary, this paper has highly relevant and cutting-edge for improve the system performance of radio resource scheduling algorithms of next generation wireless system. The proposed radio resource scheduling algorithms and simulation results have; certain reference values for increase resource scheduling efficiency and QoS performance. Particularly, the algorithm in the paper has more applicability.