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Method for reducing small-region interference in time-division synchronous CDMA accessing system

A technology of synchronous code division multiple access and inter-cell interference, which is applied in the direction of network traffic/resource management, electrical components, radio/inductive link selection and arrangement, and can solve the problem that TD-SCDMA system configuration cannot be optimized and system capacity is sacrificed And other issues

Inactive Publication Date: 2006-08-09
诺基亚西门子通信系统技术(北京)有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

In this way, although the strong interference between the adjacent cells can be avoided, it also loses the advantage that the TD-SCDMA system can flexibly configure the number of different uplink and downlink service time slots according to different service types, so that TD-SCDMA The configuration of the system cannot be optimized, sacrificing the capacity of the system

Method used

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  • Method for reducing small-region interference in time-division synchronous CDMA accessing system
  • Method for reducing small-region interference in time-division synchronous CDMA accessing system
  • Method for reducing small-region interference in time-division synchronous CDMA accessing system

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Embodiment Construction

[0025] Embodiment 1 of the present invention is shown in FIG. 5 .

[0026] In Embodiment 1 of the present invention, according to the difference of main service types in each area of ​​the TD-SCDMA system, the TS0 which is always the downlink service time slot and the TS0 which is always the uplink service time slot stipulated in the TD-SCDMA system standard are removed. TS1, in the voice service-based area A, TS2 and TS3 are configured as time slots for uplink services, TS4, TS5, and TS6 are configured as time slots for downlink services, and between TS3 and TS4 are uplink and downlink As shown in Figure 5(a), TS2 is configured as an uplink service time slot, and TS3, TS4, TS5, and TS6 are configured as downlink service time slots in the area B where the data download service is the main , between TS2 and TS3 is the switching point of uplink and downlink, as shown in FIG. 5(b); cell a and cell b are located in and adjacent to the area A and area B respectively.

[0027] It c...

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Abstract

Base on different types of service in each region of system, the method allows TD-SCDMA system configures different numbers of time slots for upward and downward services for the region smartly. The said method is only applied to adjacent sub zones in configuration area, where there are different numbers of time slots for upward and downward services. Based on link estimation of investigated user device, and result report for measured channel power of interference signal up or down link, network controller determines whether a time slot is assigned to the investigated user device in order to reduce mutual interference between adjacent sub zones with different service time slots being configured. The network controller also carries out periodic monitoring for switching number inside sub zone in the said two adjacent sub zones in order to overcome influence on channel allocation caused by time varying character of interference signal so as to optimize allocation and raise capacity.

Description

(1) Technical field [0001] The present invention relates to a method for reducing interference in a wireless communication system, and more specifically relates to a method for reducing inter-cell interference in a time division-synchronous code division multiple access system. (2) Background technology [0002] Time Division-Synchronous Code Division Multiple Access (TD-SCDMA: Time Division-Synchronous Code Division Multiple Access) system is one of the third generation mobile communication system access network (Radio Access Network) standards, working in UTRAN (UMTS Terrestrial Radio Access Network) under the network architecture, it is standardized by the 3GPP (3rd Generation Partner Project) standardization organization. [0003] The TD-SCDMA system adopts the Time Division Duplex (Time Division Duplex) method, that is, the uplink and downlink are not separated on the carrier frequency (Carrier frequency), but the uplink is separated by different time slots (Time Slot)....

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04W24/08H04W24/10H04W28/16H04W72/04
Inventor 马瑞克白伦博张宇
Owner 诺基亚西门子通信系统技术(北京)有限公司
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