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Graded access overload control method

An overload control and hierarchical technology, which is applied in access restriction, electrical components, wireless communication, etc., can solve problems such as conflicts and achieve good performance

Active Publication Date: 2016-08-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

If two or more UEs select the same preamble on the same time-frequency resource, it will cause a collision

Method used

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Embodiment Construction

[0027] 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.

[0028] Such as figure 2 As shown, a hierarchical access overload control method includes:

[0029] Step 1: Divide preambles of contention-based random access into a first group of preambles and a second group of preambles. The number of available preambles in this embodiment is 54, wherein the preambles included in the first group of preambles are 1~S, and the preambles included in the second group of preambles are S+1~54, and S represents the first The boundary between one group of preambles and the second group of preambles, high-level users can only choose the preambles in the first group of preambles, and low-level users can only choose the preambles in the second group of preambles.

[0030] Step 2. The base station sends system inf...

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Abstract

The invention discloses a graded access overload control method. An embodiment of the method comprises steps as follows: competition-based lead codes available to random access are divided into a first group of lead codes and a second group of lead codes; a base station issues system information through a broadcast channel; the system information comprises grouping information of the lead codes and backoff time during conflicts among users; when an access time slot is reached, advanced-level users select the lead codes from the first group of lead codes for random access, and low-level users select the lead codes from the second group of lead codes for random access; the overload condition of random access of the advanced-level users is monitored in real time, and the number of the lead codes in the first group of the lead codes and the number of the lead codes in the second group of the lead codes are adjusted according to the overload condition of random access of the advanced-level users. When more users participate in access, priority access of advanced-level users is guaranteed, and besides, the demand that all users can successfully access to the network is met as far as possible.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a hierarchical access overload control method. Background technique [0002] One of the biggest characteristics of communication in the context of smart grid is that it has a large number of users, so it is easy to have a dense access application flow in a relatively short period of time. In addition, considering the fact that the business in the smart grid is graded, that is, the smart grid business has a graded distinction in the index of tolerance to access delay, and some emergency services are less tolerant to delay in accessing the network , the requirements for access network delay are very strict, and some periodic reporting services have a greater tolerance for access delay, and it is acceptable to access the network within a relatively long period of time. At present, domestic smart grids generally use LTE as the basic communication architecture, but the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/06H04W74/08
CPCH04W48/06H04W74/085
Inventor 阎波官露郭志勇黎俣珩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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