Intra-cell device to device direct communication method based on user device relay

A user equipment, direct transmission communication technology, applied in the field of direct transmission communication from equipment to equipment in the same cell based on user equipment relay, can solve the problems of long transmission and waiting time, low data transmission rate, low network coverage, etc., and achieve improved Data transmission rate, improvement of system performance, and effect of alleviating business pressure
CN103634812AActive Publication Date: 2014-03-12XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2014-03-12

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Abstract

The invention discloses an intra-cell device to device direct communication method based on user device relay. According to the method, when a first device and a second device in the same cell need to be communicated with each other, if a ProSe server finds the distance between the two devices is too far to meet the distance requirement of device to device communication, the ProSe sends a request message for searching for an available relay device to an eNB (evolved node base) ; after receiving the request message, the eNB searches and feeds a result back to the ProSe server; the ProSe server selects a proper relay device by using the feedback result, and sends a beacon resource request to the eNB; the eNB respectively allocates beacon resources for the first device and the relay device as well as the second device and the relay device, and the relay device and the second device notify the eNB of a communication quality detection result; device to device communication scheduling is performed; after finishing service transmission, the communication devices release the device to device resources. According to the method, the communication is performed in a device to device relay mode, sending power is reduced, user device energy is saved, and the system performance is improved.
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Description

technical field

[0001] The invention belongs to the technical field of network communication, and in particular relates to a method for communicating directly from equipment to equipment in the same cell based on user equipment relay. Background technique

[0002] In the LTE system, a new communication method - direct communication of device to device (Device to Device D2D) is introduced. The so-called device-to-device (D2D) communication means that two adjacent user terminals use the resources allocated to them by the base station to perform direct transmission communication, and the data information transmitted between the user terminals of the device-to-device (D2D) communication does not need to pass through the base station ( Base station (eNB): evolved Node B) as a relay. The advantages of the device-to-device (D2D) proposal are as follows: ①. Data is directly transmitted between users without being forwarded by the base station, which can enable user devices to have ...

Claims

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