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Data transmission method of terminal direct communication in cellular and D2D hybrid network

A data transmission method and terminal direct communication technology, applied in the field of wireless communication, can solve the problem of not being able to know when and how to send data, etc., and achieve the effect of improving the utilization rate of wireless resources, avoiding interference, avoiding collision and harmful interference

Inactive Publication Date: 2013-04-03
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0017] (D) Before D2D data is transmitted, signaling needs to be exchanged, otherwise, D2D UE cannot know when and how to send data

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  • Data transmission method of terminal direct communication in cellular and D2D hybrid network
  • Data transmission method of terminal direct communication in cellular and D2D hybrid network
  • Data transmission method of terminal direct communication in cellular and D2D hybrid network

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] The application scenario of the method of the present invention is: in a cellular network based on Long Term Evolution (LTE), cellular transmission adopts frequency division duplex FDD (Frequency Division Duplexing) or time division duplex TDD (Time Division Duplexing), D2D transmission The TDD mode is adopted, and the D2D UE multiplexes the uplink spectrum resource of the cellular UE. The present invention can also be used in other communication networks based on Orthogonal Frequency Division Multiple Access (OFDMA) technology or SC-FDMA (Single-carrier Frequency-Division Multiple Access) technology.

[0047] see Figure 5 , introduces the data transmission method of terminal direct communication in the cellular and D2D hybrid network of t...

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Abstract

The invention discloses a data transmission method of a terminal direct communication in a cellular and D2D hybrid network, which comprises the following operation steps of: (1) while initializing a network, dividing spectrum resources for a common control channel (CCCH) of D2D communication, and providing a same frame structure for the D2D communication and cellular communication; (2) allocating the CCCH spectrum of the D2D communication, and defining a signaling and temporal relation loaded on the CCCH; (3) before starting the D2D communication, acquiring uplink resource allocation information of cellular user equipment (UE) by D2D UE, and measuring signals loaded on the allocation resources depending on the information, to obtain information on interference intensity of the various cellular UE; and (4) when transmitting the data by the D2D UE, interacting by a public control signaling and the temporal relation thereof to compete for cellular uplink resources; and implementing a wireless resource management decision depending on the measured interference information, to complete the data transmission. The data transmission method disclosed by the invention has the advantages that the operation is simple and convenient, wireless resource utilization rate is improved, D2D data transmission is more efficient, and the interference with the cellular communication can be avoided.

Description

technical field [0001] The invention relates to a data transmission 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 these two networks are introduced as follows: [0003] Cellular network: The network divides the coverage area into multiple cells, and each cell has its own base station working at different frequencies, which greatly improves the capacity of the mobile communication network. Under this network structure, a user terminal UE (User Equipment) communicates with other user terminals through a base station, and this communication mode is called a cellular mode. Even when the distance between the sending and receiving terminals is very close, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W74/08H04L5/00H04L1/18
Inventor 彭涛漆渊刘子扬
Owner BEIJING UNIV OF POSTS & TELECOMM
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