Long term evolution (LTE) based multicast single frequency network splitting method

Abstract

The invention relates to a long term evolution (LTE) based multicast single frequency network, which is characterized on that on the basis of the maximum transmission time delay difference of a base station or the effective base station proportion, a single frequency network with the obviously reduced transmission performance because of too large regions is split into a plurality of sub single frequency networks for reducing the interference among signs in the single frequency network, and the integral transmission performance of the single frequency network is ensured. The large number of the split sub single frequency networks indicates the requirement of more frequency spectrum resources, so when the single frequency network is split, the number of the split sub single frequency networks is possibly reduced on the premise of ensuring the transmission performance, the reasonable eclecticism between the sub single frequency network number and the multicast transmission performance is realized for using possibly fewer sub single frequency networks as the cost, and the coverage rate and the throughput of the single frequency network are improved.

Description

technical field [0001] The invention relates to a method for splitting a multicast single frequency network based on Long Term Evolution (LTE). Intersymbol interference, to achieve a reasonable compromise between the number of SFNs and multicast performance, at the expense of increasing the number of SFNs, improve the coverage and throughput of SFNs; it belongs to the technical field of wireless communication. Background technique [0002] Multimedia Broadcast Multicast Service MBMS (Multimedia Broadcast Multicast Service) is a point-to-multipoint service in which a data source sends information to multiple users, such as mobile TV, wireless broadcasting, etc., because it can realize the sharing of spectrum resources and the flexibility of wireless resources Scheduling is also an important business of the next generation communication system. [0003] At present, the research on MBMS is mostly focused on single-cell MBMS. Because the signal-to-interference-noise ratio of ce...

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Problems solved by technology

[0009] It can be seen from the above analysis that the performance of the MBMS system is closely related to the topological structure of the single frequency network: when the area of ​​the single frequency network becomes larger, for a user in the single frequency network, the base station far away from the user The transmitted signal will enhance its interference signal due to its large delay, so that the user's signal-to-interference-noise ratio is significantly reduced

Moreover, when the inter-symbol interference in the SFN exceeds a certain level, the performance of the SFN will drop significantly

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