Method for establishing D2D multicast communication and allocating wireless source thereof in IMT-A system

Abstract

A method for establishing D2D multicast communication and allocating wireless source thereof in the IMT-A system is used for the data communicating service based on local sharing in the system. The multimedia multicast technology is introduced into the D2D technology for solving the high-speed data sharing request of one mobile terminal on multiple mobile terminals to realize the eNB-assisted D2MD communication under the IMT-A honeycomb network. The method comprises a control signaling interactive progress of the eNB and the D2MD group in the communication establishing process and a wireless source allocating progress of the eNB for the D2MD group. The method for establishing the D2D multicast communication and allocating wireless source thereof in the IMT-A system has the advantages of reducing the eNB load under the IMT-A, and greatly improving the spectral efficiency and throughput capacity of a cell as the D2MD can reuse the spectral source under the premise of not affecting the communication of honeycomb users. The wireless source allocating progress of the eNB for the D2MD comprises three steps of mode selecting, spectrum allocating and power controlling. The method aims at the applying requests of the D2MD users, ensures the QOS (quality of service) of all users as much as possible, is simple in operation, clear in algorithmic logic and low in complexity, and has better promoting and applying prospects.

Description

technical field [0001] The present invention relates to a communication establishment and wireless resource allocation method involving a D2D multicast scene in an IMT-A system. The method needs to be based on the traditional fourth-generation mobile communication system 4G cellular network, and requires terminal support, including terminals and base stations. The process of establishing communication between terminals and the process of allocating wireless resources for communication by a base station belong to the technical field of wireless communication transmission. Background technique [0002] Because the traditional cellular mobile communication system is centered on the base station, its structure has limitations in cell coverage and service provision methods, and the IMT-A system still has problems in coverage and capacity. For this reason, relay (Relay) technology, Coordinated Multiple Points (Coordinated Multiple Points) technology, and SFN multicast communicatio...

AI Technical Summary

Problems solved by technology

Since D2D multicast uses the same frequency band for all users and transmits at the same time, if the base station does not allocate orthogonal frequency band resources, D2D multicast will cause greater interference to multiplexed cellular users. Therefore, D2D multicast spectrum resources The selection will be more stringent

At the same time, the traditional multicast transmission only includes the downlink, and generally there is no uplink, and D2D multicast will not generate the process of data mutual transmission. If the D2D multicast receiver wants to feed back data to the D2D multicast sender, Need to use D2D technology to achieve

[0008] Therefore, in view of the many differences and associations between D2D multicast and traditional multicast and traditional D2D technology, there is still no complete set of technical solutions that can clearly combine the advantages of the two traditional technologies so as to realize the use of base station authorization. Frequency Band D2D Link Multicast Transmission

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