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Wireless admission control method and device

An admission control and wireless technology, applied in access restriction, wireless communication, electrical components, etc., can solve the problem that the wireless admission control mechanism is not suitable for the high-speed railway environment, and achieve the effect of ensuring the service quality of the business and reducing the drop rate.

Inactive Publication Date: 2013-06-12
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0006] Compared with ordinary cellular networks, the distribution of base stations and cells and the speed of users in the high-speed railway environment have undergone great changes. The wireless admission control mechanism based on ordinary cellular networks is not suitable for high-speed railway environments.

Method used

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  • Wireless admission control method and device

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Embodiment 1

[0054] see figure 1, the high-speed railway communication system adopts a layered network architecture. Since handovers between different cells distributed along the railway line occur frequently, in order to reduce frequent handovers, it is necessary to expand the coverage of the cells. Therefore, this embodiment proposes a solution for distributed base stations. The base station includes: BBU (Building Baseband Unit, indoor baseband processing unit) and RRU (Radio Remote Unit, remote radio unit). The BBU is placed in the base station, and the RRU can be flexibly deployed along the railway line. Multiple RRUs can be connected to a BBU through optical fibers, and the RRUs are connected to nearby transmitting antennas through coaxial cables. The BBU and the RRU are used to process the baseband signal and the radio frequency signal respectively, so that the baseband signal and the radio frequency signal can be processed separately. Optical fibers are used to transmit baseband...

Embodiment 2

[0130] see Figure 9 , this embodiment provides a wireless admission control device, the device includes:

[0131] The bit error rate determination module 201 is used to determine the bit error rate by using the Rice fading model according to the moving speed of the user requesting to access the network;

[0132] The user bit rate determination module 202 is used to determine the bit rate of the user requesting to access the network according to the bit error rate and the requested data rate;

[0133] The admission control module 203 is used to determine whether to admit the user who requests to access the network according to the relationship between the sum of the bit rate of the existing users in the network and the bit rate of users who request to access the network, and the transmission capacity of the cell.

[0134] Wherein, the bit error rate determination module 201 is specifically used for

[0135] Calculate the channel impulse response of the line-of-sight path and...

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Abstract

The invention discloses a wireless admission control method and a device and relates to the field of wireless access. The wireless admission control method includes the steps: adopting a Rice fading model to confirm a bit error rate according to a mobile speed of a user requesting for accessing to network, confirming a bit speed of the user requesting for accessing to the network according to the bit error rate and a request data speed, and confirming whether to admit the user requesting for accessing to the network or not according to the size relationship between a sum of a bit speed of a user accessed to the network and the bit speed of the user requesting for accessing to the network and transmission capacity of a community. The wireless admission control method and the device capable of considering affects of the bit error rate to the data speed during high-speed mobile of the user and guaranteeing quality of business service.

Description

technical field [0001] The present invention relates to the field of wireless access technology, in particular to a method and device for wireless admission control. Background technique [0002] With the rapid development of high-speed railways, more and more users choose this fast and convenient means of transportation, which brings new challenges to the deployment of communication networks. [0003] The current wireless admission control mechanisms are all researched on the basis of vehicle speeds below 200km / h in ordinary cellular networks. In the cellular network, there are many indirect paths between the transmitter and the receiver, so the admission control mechanism also adopts the corresponding Rayleigh fading model. Moreover, the moving speed of the user in the cell is relatively slow, so the admission control mechanism usually ignores the moving speed of the user. [0004] However, in the high-speed railway environment, different cells are distributed along the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/08H04W48/04H04W48/06
Inventor 李曦赵宜升徐全盛李屹纪红王珂
Owner BEIJING UNIV OF POSTS & TELECOMM
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