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A hierarchical access overload control method

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

Active Publication Date: 2019-07-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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] like 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 inform...

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Abstract

The invention discloses a hierarchical access overload control method, one embodiment of which includes dividing the available preambles for contention-based random access into a first group of preambles and a second group of preambles; Sending system information, the system information includes the grouping information of the preamble and the backoff time when the user collides; when the access slot is reached, the high-level user selects the preamble from the first group of preambles for random access, A low-level user selects a preamble from the second group of preambles for random access; monitors the overload situation of the high-level user random access in real time, and adjusts the first group according to the overload situation of the high-level user random access a preamble and the number of preambles in the second set of preambles. When the number of users participating in the access is large, the present invention gives priority to ensuring the access of high-level users, and at the same time satisfies that all users can successfully access the network as much 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 Patents(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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