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Multilevel random accessing method based on packet

A technology of random access and random access process, applied in access restriction, broadcast service distribution, digital transmission system, etc., can solve the problems of strong, network performance deterioration, collision, etc. The effect of reducing the probability of conflict and meeting real-time requirements

Inactive Publication Date: 2007-09-05
HUAZHONG UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

In this way, each mobile station will send data as soon as it has data. It will go its own way without a unified command. When there are many random access data packets, serious collisions will occur, causing strong noise, and the network performance will deteriorate sharply.

Method used

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  • Multilevel random accessing method based on packet
  • Multilevel random accessing method based on packet
  • Multilevel random accessing method based on packet

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and example the present invention is described in further detail.

[0039] As shown in Figure 1, the base station 010 sets several groups 20.1, 20.2, ..., 20.n for selection by the mobile station, so that each mobile station in the wireless access network belongs to a group, and each group A group corresponds to a group number. For example, group 20.1 includes mobile stations 1.1,...,1.m, group 20.2 includes mobile stations 2.1,...,2.j,..., group 20.n includes mobile stations n.1,...,n.k , where m, n, k, j represent arbitrary integers, and they can take the same value or be different. Hereinafter, the single-cell radio access network in FIG. 1 will be referred to as "network" or "the entire network".

[0040] As shown in Figure 2, the present invention is carried out between the above-mentioned base station and the mobile station, and the random access procedure of the system starts every time and all includes the random ...

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Abstract

The method comprises: dividing the mobile stations desired to access the network into several groups; through two random access stages, the mobile station accesses the network; in first stage random access stage, the base station is only permitted to send group number signals; according to the group access state, the base station sets one of groups as 'currently active group, and instructs the mobile station in the group to enter into the second random access stage, and instructs the other groups not content use the backward random access channel. In the second stage, the mobile station in the current active group sends the random access signals, until successfully accessing the network or the access process is stopped by base station; when the access process is stopped, the base station sets another group to enter into second stage.

Description

technical field [0001] The invention belongs to the technical field of random access of data link layer protocols in a wireless communication system, and in particular relates to a multi-level random access method based on grouping. Background technique [0002] Random access is a process in which a mobile station requests access to the system. Random access can be used not only for the first access of the mobile station, to support call initiation, but also for services such as paging response, registration, short message and burst data transmission. The random access protocols of the existing mobile communication systems all use the ALOHA random access technology, but there are differences in the ALOHA of different systems. [0003] The characteristic of random access is that each user can send information randomly according to their own wishes, and there is only one common channel. As long as the frames they send have a little overlap in time, collisions will occur. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04Q7/38H04Q7/28H04L29/08H04L29/06H04W4/08H04W48/10H04W74/08
Inventor 刘建朱光喜王玲罗力平
Owner HUAZHONG UNIV OF SCI & TECH
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