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

A TD-SCDMA and access control technology, applied in the field of multi-slot access control methods and devices, can solve the problems of lack of flexibility in resource allocation, insufficient consideration, and poor compliance with time slot load calculations, etc.

Inactive Publication Date: 2013-11-06
COMBA TELECOM SYST CHINA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Experimental program
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Embodiment 1

[0071] Such as figure 1 As shown, a kind of multi-slot access control method suitable for TD-SCDMA system described in the present invention comprises the following steps:

[0072] Step S1 , obtaining information about the service applying for access, and calculating the number of uplink BRUs (Basic Resource Units) and downlink BRUs required to access the services according to the information about the service applying for access.

[0073] The above service information includes: service direction indication, service type, service maximum rate, and the maximum number of time slots supported by a single subframe in the uplink and downlink directions of the user terminal, etc. Refer to the table below for how to obtain specific parameters:

[0074]

[0075]

[0076] Currently, the number of uplink and downlink BRUs required by the service to be accessed is mainly obtained by searching the referenced configuration in the 3GPP34.108 protocol according to the service type and...

Embodiment 2

[0151] As a better embodiment, the main difference between this embodiment and Embodiment 1 is that step S10 is also included before step S1: prioritizing multiple carriers configured in the cell; when a service is accessed, select a priority The highest carrier performs access control.

[0152] In the TD-SCDMA system, a cell may be configured with multiple frequency point carriers. When making access decisions on services, in order to improve efficiency and ensure real-time access, the present invention considers selecting one of the configured N carriers. The carrier with the highest priority performs access control. If the carrier with the highest priority cannot access the service, it is considered that other carriers cannot access the service at the moment, so the application for the service is directly rejected, and no further attempts are made to access the service. Access to other carriers. Carrier prioritization may specifically include the following steps:

[0153]...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/02H04W72/12
Inventor 陈少俊谢杰华李馨
Owner COMBA TELECOM SYST CHINA LTD