Design And Research On Inter-cell Interference Coordination In LTE System

3GPP had initiated the long term evolution (LTE) as the develop direction of the next-generationwireless mobile communication at the end of2004. In order to satisfy the increasing demand forhigher data rates, Multimedia Broadcast Multicast Service (MBMS) was proposed to meet therequirements of point-to-multipoint multimedia transmission services. It serves a larger number ofusers who have the same requirements with fewer resources. But some problems come: how toselect the transmission rate for the multicast group, how to allocate the resource block and whichmulticast group can get the resource block. These problems make the scheduling of multicastservices more challenging. This thesis mainly discusses the wireless resource scheduling of MBMSin LTE system and analyzes the performance of the scheduling scheme from the view of the systemlevel simulation.As a broadcast system requires uplink feedback, MBMS’s performance is limited by UEs in poorconnections. To this end, this thesis proposes two Frequency Domain Packet Scheduling (FDPS)schemes for the transmission of multimedia streaming in MBMS of LTE networks, TLSMS schemeand TLSMS-BOE scheme. The proposed schemes divide the multimedia streaming into two layerswhich are characterized by two different flows: the basic layer and the enhancement layer. To serveall users and increase the throughput at the same time, the two layers use different schedulingmethods base on the channel quality of UEs.In TLSMS scenario, each multicast group will firstly get two RB blocks for its service, one forthe transmission of basic layer, and the other for enhancement layer. Then the reminding RB blockswill be allocated for the transmission of enhancement layer to the multicast group who has thelowest throughput.In TLSMS-BOE scenario, all the RB blocks are firstly allocated to the multicast groups for thetransmission of enhancement layer. Then each multicast group will select an allocated RB block inwhich the enhancement service will be replaced by the basic service. The rule of selection is tominimize the loss of throughput.Theoretical analysis and simulation show that in practical application, the suggested schemes areof practically valuable as they have better system performance in comparison with the existingapproaches. TLSMS scenario has better performance on fairness, and TLSMS-BOE scenario hasadvantage in higher system throughput and user spectral efficiency.