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Data access method

A data access and data technology, applied in advanced technology, electrical components, sustainable buildings, etc., can solve problems such as reducing the efficiency of uplink channel usage, increasing terminal waiting time, and terminal energy waste, so as to reduce redundant requests and reduce Packet collision, energy saving effect

Inactive Publication Date: 2012-05-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this will cause waste of terminal energy, on the other hand, it will reduce the use efficiency of the uplink channel, resulting in an increase in the waiting time of the terminal
[0008] Second, there may be redundant requests
Obviously, redundant requests will cause energy waste on the one hand, and will aggravate the occurrence of collisions on the other hand

Method used

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Embodiment Construction

[0033] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0034] In an on-demand data access network, reducing unnecessary requests can reduce energy consumption and reduce collisions of request data packets, thereby achieving the purpose of improving system efficiency and increasing the use time of terminal power. In other words, when a terminal needs to obtain certain data, it can send a request with a certain probability to achieve the purpose of reducing energy consumption and reducing collisions. The key to solving the problem is to determine the best probability for the terminal to send a request.

[0035] Generally, a certain degree of cooperation is required between nodes to determine the best probability of a node sending a request. In a distributed network, d...

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PUM

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Abstract

The invention discloses a data access method which comprises the following steps: acquiring the optimum transmission probability of a terminal; sending a request to a server according to the optimum transmission probability when the terminal needs acquiring date from the server; and receiving the data sent by the server through the terminal during the next period. The invention avoids negotiationamong terminals, efficiently reduces system expense and time delay, and saves energy; the terminal determines whether a request needs sending out according to the selected optimum probability value, thereby efficiently reducing redundant requests. Therefore, on one hand, the energy is saved, on the other hand, data packet conflict is reduced; the system efficiency is improved; and the use time ofa terminal power supply is efficiently prolonged. Furthermore, the invention supports a network system framework based on PMP, so that the invention has low complexity of the system, easy accomplishment, and strong expansibility.

Description

Technical field [0001] The invention relates to the technical field of broadband wireless communication networks, in particular to a data access method. Background technique [0002] With the rapid development of wireless communication technology, wireless mobile terminals (such as mobile phones, PDAs, notebook computers, etc.) have become more and more popular, and the application range of wireless networks has become wider and wider. One application of the wireless network is on-demand data access, that is, all data is stored in a specific server, and the wireless terminal can send requests to the server as needed to obtain the required data. This technology can be widely used in wireless data on demand and wireless video on demand. However, the currently commonly used random access technology is the time-slot ALOHA method, which is not an efficient method. Therefore, it is an important problem that needs to be resolved in a new era that can effectively achieve on-demand data ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04W72/04
CPCY02B60/50Y02D30/70
Inventor 李伟樊平毅
Owner TSINGHUA UNIV
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