Autonomous equipment discovering method in D2D communication system

An autonomous device and discovery method technology, applied in the network field, can solve the problems of large time and power consumption, time waste, interference, etc., to save resources, solve the conflict of sending signals, and reduce the complexity of implementation

Active Publication Date: 2013-10-02
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0014] (3) Problems caused by FDM-based design
At the same time, this way of jumping also solves the problem of sensitivity
[0018] 2. Defects in FlashLinQ
[0023] (2) During the device discovery process of FlashLinQ, the device scans all the discovery resources within the first 8s of the discovery stage, and detects interference to determine the PDRID that can be used in the next cycle. Therefore, when the device is in a low-speed mobile state At this time, the change of the location of the devic

Method used

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  • Autonomous equipment discovering method in D2D communication system
  • Autonomous equipment discovering method in D2D communication system
  • Autonomous equipment discovering method in D2D communication system

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Embodiment Construction

[0055] refer to Figure 1-10 Examples of the present invention will be described.

[0056] In order to make the above objects, features and advantages more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057] Aiming at some defects existing in the existing equipment discovery algorithm, the present invention proposes a new and more flexible equipment discovery method.

[0058] The present invention is based on the following basic assumptions:

[0059] 1) The device discovery function uses the uplink resources of the LTE system, and the system allocates fixed channel resources for device discovery.

[0060] 2) If the devices are all within the coverage of the eNB, these devices can be consistent with the eNB in ​​the time slot. UEs that are not within the coverage of the eNB can be synchronized by GPS or the like.

[0061] 3) The present invention assumes that the equ...

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PUM

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Abstract

The invention discloses an autonomous equipment discovering method in a D2D (Dimension To Dimension) communication system. The discovering resources comprise a uniformly-spaced time slot resource and a uniformly-spaced single frequency resource, and the time slot resource appears periodically. The method comprises the following steps: setting the time slot resource period as the preset value T0, and informing UE (Unified Equipment) the discovered used total resource position; determining the sending used resource according to the principle of selecting time slot first and then selecting frequency by the equipment, and selecting according to the greedy manner by the frequency resource; sending periodic automatic switching, and setting the preset value N1, prolonging the period when the UE fails to send in continuous N1 periods, and corresponding shortening the period when the UE succeed in sending in continuous N1 periods; receiving discovering signals sent by other UE on other resources by the UE. The method can reduce the problems of disturbance, collision and speed in the discovering process, and improves the utilization ratio of the resource.

Description

technical field [0001] The present invention relates to the field of network technologies, in particular to a method for discovering autonomous devices in a D2D communication system. Background technique [0002] In the future, IMT-Advanced will provide bandwidth up to 100MHz to achieve high-speed transmission. In order to meet the requirements of IMT-A, many new wireless access technologies have been proposed. Among them, device-to-device (D2D) has attracted more and more attention as a promising technology. D2D communication is a technology that allows terminals to communicate directly under the control of the base station. It can increase the spectral efficiency of the cellular communication system, reduce the terminal transmission power, reduce the load of the cell base station, and reduce battery consumption. To a certain extent Solve the problem of lack of spectrum resources in wireless communication systems. [0003] With the popularity of applications such as soci...

Claims

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Application Information

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IPC IPC(8): H04W48/16H04W72/04
CPCY02D30/70
Inventor 薄晓宁徐少毅
Owner BEIJING JIAOTONG UNIV
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