Multi-slot access control method and device of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system

Abstract

The invention provides a multi-slot access control method and device of a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system. The method comprises the following steps of: acquiring information of an access application business, and calculating the number of uplink BRUs and the number of downlink BRUs needed to access the business; judging the direction of the business, and performing downlink access control if the direction of the business is one-way downlink; performing uplink access control if the direction of the business is one-way uplink; performing downlink access control if the direction of the business is two-way symmetrical or two-way asymmetrical, and performing uplink access control after the downlink access control is judged to be successful; and performing multi-slot joint code channel distribution according to the number of the uplink BRUs and the downlink BRUs needed to access the business and the number of the BRUs of the business which can be loaded by respective uplink time slots and respective downlink time slots, wherein the number of the BRUs is calculated to obtain in the uplink access control process and the downlink access control process. In the multi-slot access control method and device of the TD-SCDMA system, provided by the invention, the support on the multi-slot access ability of a subscriber terminal is sufficiently taken into consideration, thus, the channel distribution is more flexible, and the success rate of the access is increased.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multi-slot access control method and device applied to a TD-SCDMA system. Background technique [0002] The CDMA system is a self-interference system, its system capacity is not a relatively fixed value, but has greater flexibility, and there is a balance and compromise relationship between the quality of service and the quality of users who access at the same time. As the number of access users increases, the air interface load of the system gradually increases. If the air interface load is allowed to increase excessively, the coverage area of ​​the cell will be reduced below the planned value, and the service quality of the existing connection will not be obtained. ensure. Therefore, a reasonable and effective access control algorithm is of great significance to the stable operation of the CDMA system. [0003] In the TD-SCDMA system, the user's access decision is ma...

AI Technical Summary

Problems solved by technology

This method does not fully consider the characteristics that TD-SCDMA can allocate multiple time slot resources for one user, and lacks flexibility in the overall resource allocation of the system, resulting in a relatively low access success rate of the system; at the same time, most of the existing access The access control algorithm is based on the algorithm design of the WCDMA system, and the calculation of the load of the time slot cannot be well adapted to the characteristics of the TD-SCDMA system, and the load estimation after the new service access is inaccurate

The TD-SCDMA system has system characteristics different from WCDMA, such as joint detection technology, time-division characteristics, cell support N frequency points, etc. The access control algorithm should conform to its own system characteristics, and the traditional algorithm often involves complex matrix operations Or iterative calculation, the calculation delay is very large, so it is more difficult to ensure the real-time performance of access control

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