Access control method for physical random access channel

A channel access, dynamic random technology, applied in the field of communication, can solve the problems of increased probability of collision, waste of resources, increased user delay, etc.

Inactive Publication Date: 2014-12-10
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

When the number of users is large, if it is not controlled, the probability of this kind of collision will increase greatly. On the one hand, it will cause waste of resources and increase user delay. Therefore, a method that can adapt to different users and different services is proposed. access control method.

Method used

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  • Access control method for physical random access channel
  • Access control method for physical random access channel
  • Access control method for physical random access channel

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Embodiment Construction

[0018] The basic idea of ​​the present invention is: first, the terminal classifies the clusters according to the QOS, and the base station allocates the maximum number of M clusters allowed. Sort cluster Mi according to the size of QOS. Each cluster has its own maximum delay requirement. When the number of users increases to a certain value and the user delay of a certain cluster exceeds the maximum transmission delay, the access attempt time of the cluster with the lowest priority is extended. When the access attempt time of the cluster is longer than the time for the system to start DAB, DAB is started. The base station continuously monitors the user delay of the cluster. When no cluster exceeds the maximum delay, DAB is prohibited. In this way, a reciprocating process realizes dynamic Control the number of access users to meet differentiated user needs.

[0019] The method for PRACH access control of the present invention, refer to figure 2 As shown, it mainly includes ...

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Abstract

The invention provides an access control method for a physical random access channel (PRACH). The method comprises the steps that cluster classification is carried out on users according to quality of service (QOS) of terminal request service, an evolved Node B (eNB) distributes the number of at most M permissible clusters; wherein each cluster has the maximum time delay requirement, when user quantity is increased to a certain number, the user time delay of a cluster exceeds the maximum transmission time delay, the access attempt time for the cluster of the least priority is prolonged, when the access attempt time of the cluster is longer than the time spent in starting dynamic access baring (DAB) by a system, the DAB is started; and when the eNB detects that the quantity of successfully received msg1 is greater than a threshold value, the cluster of maximum QOS in a DAB set is prohibited starting. While taking the QOS of the user into account, the method realizes dynamic control on access, increases the access success rate of the users, provides differentiated services for the users, and improves the economic benefits of the system.

Description

technical field [0001] The present invention relates to the communication field, in particular to an access control method for a random access channel (PRACH, physical Random Access Channel). Background technique [0002] With the development of personal mobile communications, the number of mobile terminals has increased dramatically, various applications have become popular, and various new types of terminal services have emerged, posing severe challenges to the transmission capabilities of mobile communication networks. In addition to human-to-human communication, human-to-machine communication, and machine-to-machine communication are becoming more and more popular. For example, the intelligent table lookup service is characterized by periodicity, and there are a large number of access users in a certain period of time, which will cause great access pressure on the access network, and user access delays will affect user access. experience. At the same time, various mobi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
Inventor 胡智群张振海路兆铭温向明李阳春陈小奎徐恒
Owner BEIJING UNIV OF POSTS & TELECOMM
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