Interference control coordination method for terminal direct communication in cellular and d2d hybrid network

Abstract

The invention discloses an interference control and coordination method for direct communication of terminals in a cellular and dimension to dimension (D2D) hybrid network. The method comprises the following steps that: (1) a base station counts and calculates uplink transmission resource of each cellular user equipment (CeUE) and D2D communication expected interference limit which can be borne by the uplink transmission resource, and periodically updates the interference limit; (2) the base station obtains an expected UE resource-interference table formed by the D2D communication expected interference limit which can be borne by the uplink transmission resource of the CeUE according to the acquired interference control and coordination information and scheduling information and sends the expected UE resource-interference table to D2D UE; and (3) the D2D UE flexibly executes a resource management decision according to the UE resource-interference table to avoid causing strong interference to cellular uplink communication. The expected interference limit is periodically updated, so changing interference conditions can be overcome and real-time quality requirement of service transmission can be met. The base station regulates and updates calculating parameters of the expected interference limit, and a network operator can control the interference generated by the D2D UE and balance average performance between a cellular system and a D2D system.

Description

technical field [0001] The invention relates to an interference control and coordination method for terminal direct communication in a cellular and terminal direct D2D (Device-to-Device) hybrid network, and belongs to the technical field of wireless communication. Background technique [0002] The current wireless communication network is mainly divided into two types: cellular network and Ad-hoc (point-to-point) network. The communication characteristics of the two networks are: in the cellular network, a user terminal UE (User Equipment) communicates with other UEs through a base station. In an Ad-hoc network, UEs communicate directly through direct connections (or through relays). In the cellular mode, since the base station eNodeB (EvolvedNodeB) centrally controls the transmission between UEs, the base station can conveniently manage and control the radio resources and interference of the network, but its significant disadvantage is that it cannot effectively utilize ra...

AI Technical Summary

Problems solved by technology

The main problem of this solution is: since the base station controls the entire D2D communication process, all signaling related to D2D communication, including resource allocation and interference control coordination, is carried by the wireless resources of the cellular network, which will affect the throughput and capacity of cellular communication

[0008] The problem with this solution is that the resource allocation and scheduling in LTE-Advanced has the characteristics of rapid changes, that is, the resources allocated to the UE change rapidly

[0011] In the above-mentioned D2D and cellular hybrid network scenario, the biggest challenge comes from controlling and coordinating the interference between D2DTx and CeUEs whose resources are reused, and the interference from D2D transmitters is more complicated

Without network assistance, it is difficult for D2D to know the tolerable interference margin on different RBs and the cumulative interference caused by multiple concurrent D2D links

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