Second-stage user dynamic power control method for near field communication or D2D communication

A second-level user, near field communication technology, applied in the field of communication, can solve the problems of node access random network topology dynamic change control difficulty and other problems, and achieve the effect of reducing control difficulty and control overhead.

Active Publication Date: 2014-11-05
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The present invention aims to solve the problem of difficult control of node access randomness and network topology dynamic change in near-field communication, and proposes a two-level user dynamic power control method for near-field communication or D2D communication

Method used

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  • Second-stage user dynamic power control method for near field communication or D2D communication
  • Second-stage user dynamic power control method for near field communication or D2D communication
  • Second-stage user dynamic power control method for near field communication or D2D communication

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specific Embodiment approach 1

[0040] Specific Embodiments 1. A two-level user dynamic power control method for near field communication or D2D communication. In a near field communication network, it is implemented by the following steps:

[0041] Step 1. Initialization: the main system obtains the two-dimensional coordinate information of each node (including primary and secondary nodes) and the channel state information reported by each node;

[0042] Since the frequency points used by the first-level users are determined, each second-level node can establish a deterministic mapping relationship between the same level node and its frequency points Mainly affected by the distance between nodes;

[0043] After initialization, for each secondary node, the main system can calculate its corresponding mapping relationship set The elements in the set are

[0044] Step 2. Assume that the transmit power of each node is constant, which is the maximum power generated by the system. According to the possibilit...

specific example

[0056] Specific example: the first-level user set C has 5 elements, the available frequency point set F has one-to-one correspondence with the elements in set C; the candidate second-level user set D has 10 elements.

[0057] 1), initialization phase

[0058] Calculate the corresponding relationship between the elements in the set D and the elements in the set F, the formula is as follows:

[0059] μ f j i = 0.5 × ( 1 - e - ( d ij d min ) α ) + 0.5 ...

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Abstract

The invention discloses a second-stage user dynamic power control method for near field communication or D2D communication, and relates to the communication field. The second-stage user dynamic power control method aims at solving the problem that control over node access randomness and network topology dynamic changes in near field communication is difficult. The second-stage user dynamic power control method includes the steps that in the initial access grant stage, the mapping relation between nodes and available frequency points is built by a main system according to position information of the nodes; on the basis of the mapping relation, the possibility of the nodes to use any frequency point and disturbed conditions caused by the possibility are determined; the disturbed conditions of the nodes are analyzed, worst users are eliminated, and other users are operated to conduct official access; in the power control stage, a power control mathematic model under the probability statistical significance is built by the main system, and an optimal solution is searched; transmitted power of the nodes is controlled according to the optimal solution, and second-stage user access power control is completed. The second-stage user dynamic power control method is suitable for second-stage user dynamic power control over the near field communication or the D2D communication.

Description

technical field [0001] The invention relates to the communication field, in particular to a power control method. Background technique [0002] Near-field communication or D2D (Device-to-Device) terminal direct-through technology refers to the realization of the communication process between short-distance nodes by multiplexing system resources under the control of the system. This communication method can be widely used in Scenes such as social networks. The data sharing provided by near field communication can help complete many mobile service tasks. In the field of communication in hotspot areas, information such as video and audio can be quickly transmitted through collaborative transmission and data distribution between multiple nodes, and user customization is also supported. Business, etc.; in the field of national security, in response to emergencies such as earthquakes and tsunamis, and most communication equipment such as base stations are damaged, near-field comm...

Claims

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Application Information

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IPC IPC(8): H04W52/04H04W76/02
Inventor 李卓明王鹏沙学军毛圣歌刘宇琦吴玮吴宣利
Owner HARBIN INST OF TECH
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