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A kind of access congestion control method based on dynamic allocation of prach resources

A dynamic allocation and congestion control technology, applied in wireless communication, electrical components, etc., can solve the problems of access delay to be improved, and achieve the effects of convenient access congestion control, simple configuration, and good performance

Inactive Publication Date: 2020-02-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

However, this method is only applicable to the case where the number of users is not very large, and the access delay of high priority under this method needs to be improved, especially for some delay-sensitive services of the power grid

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  • A kind of access congestion control method based on dynamic allocation of prach resources
  • A kind of access congestion control method based on dynamic allocation of prach resources
  • A kind of access congestion control method based on dynamic allocation of prach resources

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Embodiment Construction

[0033] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0034] Such as figure 1 As shown, a method for access congestion control based on dynamically allocating PRACH resources includes the following steps:

[0035] S1. Divide all UE (User Equipment, indicating user terminal or user equipment) services into high and low levels;

[0036] S2. Initialize all parameters involved in access congestion;

[0037] S3.eNB (Evolved Node B, the name of the base station in LTE, which can be directly understood as a base station) sends the basic information required for random access through the broadcast channel; the basic information required for random access sent by the eNB through the broadcast channel includes: Load threshold, the number of usable preambles (generally 54 for contention), the time-freq...

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Abstract

The invention discloses an access congestion control method based on dynamically allocating PRACH resources, comprising the following steps: dividing all UE services into high and low levels; initializing all parameters involved in access congestion; Send the basic information required for random access; UE access streams with high and low priorities arrive at the access slot, and a preamble is randomly selected from the available preambles with equal probability and transmitted through the random access channel PRACH. to the eNB; if a conflict occurs, perform retransmission after backoff according to the backoff time; record the number of retransmissions of the preamble; the eNB decodes the preamble, and sends the corresponding RAR message to the UE according to the received preamble. After the UE receives the RAR message, Apply for resources to eNB; eNB implements network load estimation; eNB dynamically configures PRACH resources according to the load estimation situation, and realizes access congestion control; the present invention guarantees the access of high-priority UEs first, and reduces high-priority UEs at the same time UE access delay.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an access congestion control method based on dynamically allocating PRACH resources in an LTE communication system of a smart grid. Background technique [0002] The smart grid includes an intelligent dispatching system that can prioritize the use of clean energy, a smart metering system that can dynamically price, and an intelligent technology system that optimizes load balance by adjusting power generation and power consumption equipment. In the current power system, traditional communication methods such as PLC (Power line communication) can no longer meet the requirements of power grid construction. Due to its high reliability, high transmission efficiency and mature technology, the LTE system has been selected as the communication method of the grid access network by many countries and technologies. At present, the relevant research on applying LTE to smart g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W74/00H04W74/08
CPCH04W74/004H04W74/085H04W74/0866H04W72/52
Inventor 彭凤华阎波凤菲菲张颉
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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